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RetroZilla/layout/base/nsPresShell.cpp

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1998
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Steve Clark <buster@netscape.com>
* H<EFBFBD>kan Waara <hwaara@chello.se>
* Dan Rosen <dr@netscape.com>
* Daniel Glazman <glazman@netscape.com>
* Mats Palmgren <mats.palmgren@bredband.net>
*
* Alternatively, the contents of this file may be used under the terms of
* either of the GNU General Public License Version 2 or later (the "GPL"),
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK *****
*
* This Original Code has been modified by IBM Corporation.
* Modifications made by IBM described herein are
* Copyright (c) International Business Machines
* Corporation, 2000
*
* Modifications to Mozilla code or documentation
* identified per MPL Section 3.3
*
* Date Modified by Description of modification
* 05/03/2000 IBM Corp. Observer events for reflow states
*/
#define PL_ARENA_CONST_ALIGN_MASK 3
#include "nsIPresShell.h"
#include "nsPresContext.h"
#include "nsIContent.h"
#include "nsIDocument.h"
#include "nsIDOMXULDocument.h"
#include "nsStubDocumentObserver.h"
#include "nsStyleSet.h"
#include "nsICSSStyleSheet.h" // XXX for UA sheet loading hack, can this go away please?
#include "nsIDOMCSSStyleSheet.h" // for Pref-related rule management (bugs 22963,20760,31816)
#include "nsINameSpaceManager.h" // for Pref-related rule management (bugs 22963,20760,31816)
#include "nsIServiceManager.h"
#include "nsFrame.h"
#include "nsHTMLReflowCommand.h"
#include "nsIViewManager.h"
#include "nsCRT.h"
#include "prlog.h"
#include "prmem.h"
#include "prprf.h"
#include "prinrval.h"
#include "nsVoidArray.h"
#include "nsCOMArray.h"
#include "nsHashtable.h"
#include "nsIViewObserver.h"
#include "nsContainerFrame.h"
#include "nsIDeviceContext.h"
#include "nsEventStateManager.h"
#include "nsDOMEvent.h"
#include "nsGUIEvent.h"
#include "nsHTMLParts.h"
#include "nsContentUtils.h"
#include "nsISelection.h"
#include "nsISelectionController.h"
#include "nsReflowPath.h"
#include "nsLayoutCID.h"
#include "nsLayoutAtoms.h"
#include "nsIDOMRange.h"
#include "nsIDOMDocument.h"
#include "nsIDOMNode.h"
#include "nsIDOM3Node.h"
#include "nsIDOMNodeList.h"
#include "nsIDOMElement.h"
#include "nsHTMLAtoms.h"
#include "nsCSSPseudoElements.h"
#include "nsCOMPtr.h"
#include "nsAutoPtr.h"
#include "nsReadableUtils.h"
#include "nsUnicharUtils.h"
#include "nsWeakReference.h"
#include "nsIPageSequenceFrame.h"
#include "nsICaret.h"
#include "nsIDOMHTMLDocument.h"
#include "nsIXPointer.h"
#include "nsIDOMXMLDocument.h"
#include "nsIScrollableView.h"
#include "nsIParser.h"
#include "nsParserCIID.h"
#include "nsIFrameSelection.h"
#include "nsIDOMNSHTMLInputElement.h" //optimization for ::DoXXX commands
#include "nsIDOMNSHTMLTextAreaElement.h"
#include "nsViewsCID.h"
#include "nsFrameManager.h"
#include "nsXPCOM.h"
#include "nsISupportsPrimitives.h"
#include "nsILayoutHistoryState.h"
#include "nsIScrollPositionListener.h"
#include "nsICompositeListener.h"
#include "nsILineIterator.h" // for ScrollFrameIntoView
#include "nsTimer.h"
#include "nsWeakPtr.h"
#include "plarena.h"
#include "pldhash.h"
#include "nsIObserverService.h"
#include "nsIObserver.h"
#include "nsIDocShell.h" // for reflow observation
#include "nsIBaseWindow.h"
#include "nsLayoutErrors.h"
#include "nsLayoutUtils.h"
#include "nsCSSRendering.h"
#ifdef NS_DEBUG
#include "nsIFrameDebug.h"
#endif
// for |#ifdef DEBUG| code
#include "nsSpaceManager.h"
#include "prenv.h"
#include "nsIAttribute.h"
#include "nsIGlobalHistory2.h"
#ifdef MOZ_REFLOW_PERF_DSP
#include "nsIRenderingContext.h"
#include "nsIFontMetrics.h"
#endif
#include "nsIReflowCallback.h"
#include "nsIScriptGlobalObject.h"
#include "nsIDOMWindowInternal.h"
#include "nsPIDOMWindow.h"
#include "nsIFocusController.h"
#include "nsIPluginInstance.h"
#include "nsIObjectFrame.h"
#include "nsIPluginHost.h"
// Drag & Drop, Clipboard
#include "nsWidgetsCID.h"
#include "nsIClipboard.h"
#include "nsIClipboardHelper.h"
#include "nsIDocShellTreeItem.h"
#include "nsIURI.h"
#include "nsIEventQueue.h"
#include "nsIEventQueueService.h"
#include "nsIScrollableFrame.h"
#include "prtime.h"
#include "prlong.h"
#include "nsIDragService.h"
#include "nsCopySupport.h"
#include "nsIDOMHTMLAnchorElement.h"
#include "nsIDOMHTMLAreaElement.h"
#include "nsIDOMHTMLLinkElement.h"
#include "nsITimer.h"
#include "nsITimerInternal.h"
#ifdef ACCESSIBILITY
#include "nsIAccessibilityService.h"
#include "nsIAccessible.h"
#include "nsIAccessibleEvent.h"
#endif
// For style data reconstruction
#include "nsStyleChangeList.h"
#include "nsCSSFrameConstructor.h"
#include "nsIBindingManager.h"
#ifdef MOZ_XUL
#include "nsIMenuFrame.h"
#include "nsITreeBoxObject.h"
#endif
#include "nsIMenuParent.h"
#include "nsPlaceholderFrame.h"
// Dummy layout request
#include "nsDummyLayoutRequest.h"
// Content viewer interfaces
#include "nsIContentViewer.h"
#ifdef IBMBIDI
#include "nsIBidiKeyboard.h"
#endif // IBMBIDI
#include "nsContentCID.h"
static NS_DEFINE_CID(kCSSStyleSheetCID, NS_CSS_STYLESHEET_CID);
static NS_DEFINE_IID(kRangeCID, NS_RANGE_CID);
// convert a color value to a string, in the CSS format #RRGGBB
// * - initially created for bugs 31816, 20760, 22963
static void ColorToString(nscolor aColor, nsAutoString &aString);
// Class ID's
static NS_DEFINE_CID(kFrameSelectionCID, NS_FRAMESELECTION_CID);
static NS_DEFINE_CID(kEventQueueServiceCID, NS_EVENTQUEUESERVICE_CID);
#undef NOISY
// ----------------------------------------------------------------------
#ifdef NS_DEBUG
// Set the environment variable GECKO_VERIFY_REFLOW_FLAGS to one or
// more of the following flags (comma separated) for handy debug
// output.
static PRUint32 gVerifyReflowFlags;
struct VerifyReflowFlags {
const char* name;
PRUint32 bit;
};
static const VerifyReflowFlags gFlags[] = {
{ "verify", VERIFY_REFLOW_ON },
{ "reflow", VERIFY_REFLOW_NOISY },
{ "all", VERIFY_REFLOW_ALL },
{ "list-commands", VERIFY_REFLOW_DUMP_COMMANDS },
{ "noisy-commands", VERIFY_REFLOW_NOISY_RC },
{ "really-noisy-commands", VERIFY_REFLOW_REALLY_NOISY_RC },
{ "space-manager", VERIFY_REFLOW_INCLUDE_SPACE_MANAGER },
{ "resize", VERIFY_REFLOW_DURING_RESIZE_REFLOW },
};
#define NUM_VERIFY_REFLOW_FLAGS (sizeof(gFlags) / sizeof(gFlags[0]))
static void
ShowVerifyReflowFlags()
{
printf("Here are the available GECKO_VERIFY_REFLOW_FLAGS:\n");
const VerifyReflowFlags* flag = gFlags;
const VerifyReflowFlags* limit = gFlags + NUM_VERIFY_REFLOW_FLAGS;
while (flag < limit) {
printf(" %s\n", flag->name);
++flag;
}
printf("Note: GECKO_VERIFY_REFLOW_FLAGS is a comma separated list of flag\n");
printf("names (no whitespace)\n");
}
#endif
//========================================================================
//========================================================================
//========================================================================
#ifdef MOZ_REFLOW_PERF
class ReflowCountMgr;
static const char kGrandTotalsStr[] = "Grand Totals";
#define NUM_REFLOW_TYPES 5
// Counting Class
class ReflowCounter {
public:
ReflowCounter(ReflowCountMgr * aMgr = nsnull);
~ReflowCounter();
void ClearTotals();
void DisplayTotals(const char * aStr);
void DisplayDiffTotals(const char * aStr);
void DisplayHTMLTotals(const char * aStr);
void Add(nsReflowReason aType) { mTotals[aType]++; }
void Add(nsReflowReason aType, PRUint32 aTotal) { mTotals[aType] += aTotal; }
void CalcDiffInTotals();
void SetTotalsCache();
void SetMgr(ReflowCountMgr * aMgr) { mMgr = aMgr; }
PRUint32 GetTotalByType(nsReflowReason aType) { if (aType >= eReflowReason_Initial && aType <= eReflowReason_Dirty) return mTotals[aType]; else return 0; }
protected:
void DisplayTotals(PRUint32 * aArray, const char * aTitle);
void DisplayHTMLTotals(PRUint32 * aArray, const char * aTitle);
PRUint32 mTotals[NUM_REFLOW_TYPES];
PRUint32 mCacheTotals[NUM_REFLOW_TYPES];
ReflowCountMgr * mMgr; // weak reference (don't delete)
};
// Counting Class
class IndiReflowCounter {
public:
IndiReflowCounter(ReflowCountMgr * aMgr = nsnull)
: mFrame(nsnull),
mCount(0),
mMgr(aMgr),
mCounter(aMgr),
mHasBeenOutput(PR_FALSE)
{}
virtual ~IndiReflowCounter() {}
nsAutoString mName;
nsIFrame * mFrame; // weak reference (don't delete)
PRInt32 mCount;
ReflowCountMgr * mMgr; // weak reference (don't delete)
ReflowCounter mCounter;
PRBool mHasBeenOutput;
};
//--------------------
// Manager Class
//--------------------
class ReflowCountMgr {
public:
ReflowCountMgr();
virtual ~ReflowCountMgr();
void ClearTotals();
void ClearGrandTotals();
void DisplayTotals(const char * aStr);
void DisplayHTMLTotals(const char * aStr);
void DisplayDiffsInTotals(const char * aStr);
void Add(const char * aName, nsReflowReason aType, nsIFrame * aFrame);
ReflowCounter * LookUp(const char * aName);
void PaintCount(const char * aName, nsIRenderingContext* aRenderingContext, nsPresContext* aPresContext, nsIFrame * aFrame, PRUint32 aColor);
FILE * GetOutFile() { return mFD; }
PLHashTable * GetIndiFrameHT() { return mIndiFrameCounts; }
void SetPresContext(nsPresContext * aPresContext) { mPresContext = aPresContext; } // weak reference
void SetPresShell(nsIPresShell* aPresShell) { mPresShell= aPresShell; } // weak reference
void SetDumpFrameCounts(PRBool aVal) { mDumpFrameCounts = aVal; }
void SetDumpFrameByFrameCounts(PRBool aVal) { mDumpFrameByFrameCounts = aVal; }
void SetPaintFrameCounts(PRBool aVal) { mPaintFrameByFrameCounts = aVal; }
protected:
void DisplayTotals(PRUint32 * aArray, PRUint32 * aDupArray, char * aTitle);
void DisplayHTMLTotals(PRUint32 * aArray, PRUint32 * aDupArray, char * aTitle);
PR_STATIC_CALLBACK(PRIntn) RemoveItems(PLHashEntry *he, PRIntn i, void *arg);
PR_STATIC_CALLBACK(PRIntn) RemoveIndiItems(PLHashEntry *he, PRIntn i, void *arg);
void CleanUp();
// stdout Output Methods
PR_STATIC_CALLBACK(PRIntn) DoSingleTotal(PLHashEntry *he, PRIntn i, void *arg);
PR_STATIC_CALLBACK(PRIntn) DoSingleIndi(PLHashEntry *he, PRIntn i, void *arg);
void DoGrandTotals();
void DoIndiTotalsTree();
// HTML Output Methods
PR_STATIC_CALLBACK(PRIntn) DoSingleHTMLTotal(PLHashEntry *he, PRIntn i, void *arg);
void DoGrandHTMLTotals();
// Zero Out the Totals
PR_STATIC_CALLBACK(PRIntn) DoClearTotals(PLHashEntry *he, PRIntn i, void *arg);
// Displays the Diff Totals
PR_STATIC_CALLBACK(PRIntn) DoDisplayDiffTotals(PLHashEntry *he, PRIntn i, void *arg);
PLHashTable * mCounts;
PLHashTable * mIndiFrameCounts;
FILE * mFD;
PRBool mDumpFrameCounts;
PRBool mDumpFrameByFrameCounts;
PRBool mPaintFrameByFrameCounts;
PRBool mCycledOnce;
// Root Frame for Individual Tracking
nsPresContext * mPresContext;
nsIPresShell* mPresShell;
// ReflowCountMgr gReflowCountMgr;
};
#endif
//========================================================================
// comment out to hide caret
#define SHOW_CARET
// The upper bound on the amount of time to spend reflowing, in
// microseconds. When this bound is exceeded and reflow commands are
// still queued up, a reflow event is posted. The idea is for reflow
// to not hog the processor beyond the time specifed in
// gMaxRCProcessingTime. This data member is initialized from the
// layout.reflow.timeslice pref.
#define NS_MAX_REFLOW_TIME 1000000
static PRInt32 gMaxRCProcessingTime = -1;
// Set to true to enable async reflow during document load.
// This flag is initialized from the layout.reflow.async.duringDocLoad pref.
static PRBool gAsyncReflowDuringDocLoad = PR_FALSE;
// Largest chunk size we recycle
static const size_t gMaxRecycledSize = 400;
#define MARK_INCREMENT 50
#define BLOCK_INCREMENT 4044 /* a bit under 4096, for malloc overhead */
/**A block of memory that the stack will
* chop up and hand out
*/
struct StackBlock {
// a block of memory. Note that this must be first so that it will
// be aligned.
char mBlock[BLOCK_INCREMENT];
// another block of memory that would only be created
// if our stack overflowed. Yes we have the ability
// to grow on a stack overflow
StackBlock* mNext;
StackBlock() : mNext(nsnull) { }
~StackBlock() { }
};
/* we hold an array of marks. A push pushes a mark on the stack
* a pop pops it off.
*/
struct StackMark {
// the block of memory we are currently handing out chunks of
StackBlock* mBlock;
// our current position in the memory
size_t mPos;
};
/* A stack arena allows a stack based interface to a block of memory.
* It should be used when you need to allocate some temporary memory that
* you will immediately return.
*/
class StackArena {
public:
StackArena();
~StackArena();
// Memory management functions
nsresult Allocate(size_t aSize, void** aResult);
nsresult Push();
nsresult Pop();
private:
// our current position in memory
size_t mPos;
// a list of memory block. Usually there is only one
// but if we overrun our stack size we can get more memory.
StackBlock* mBlocks;
// the current block of memory we are passing our chucks of
StackBlock* mCurBlock;
// our stack of mark where push has been called
StackMark* mMarks;
// the current top of the the mark list
PRUint32 mStackTop;
// the size of the mark array
PRUint32 mMarkLength;
};
StackArena::StackArena()
{
// allocate the marks array
mMarkLength = MARK_INCREMENT;
mMarks = new StackMark[mMarkLength];
// allocate our stack memory
mBlocks = new StackBlock();
mCurBlock = mBlocks;
mStackTop = 0;
mPos = 0;
}
StackArena::~StackArena()
{
// free up our data
delete[] mMarks;
while(mBlocks)
{
StackBlock* toDelete = mBlocks;
mBlocks = mBlocks->mNext;
delete toDelete;
}
}
nsresult
StackArena::Push()
{
// if the we overrun our mark array. Resize it.
if (mStackTop + 1 >= mMarkLength)
{
StackMark* oldMarks = mMarks;
PRUint32 oldLength = mMarkLength;
mMarkLength += MARK_INCREMENT;
mMarks = new StackMark[mMarkLength];
memcpy(mMarks, oldMarks, sizeof(StackMark)*oldLength);
delete[] oldMarks;
}
// set a mark at the top
mMarks[mStackTop].mBlock = mCurBlock;
mMarks[mStackTop].mPos = mPos;
mStackTop++;
return NS_OK;
}
nsresult
StackArena::Allocate(size_t aSize, void** aResult)
{
NS_ASSERTION(mStackTop > 0, "Error allocate called before push!!!");
// make sure we are aligned. Beard said 8 was safer then 4.
// Round size to multiple of 8
aSize = PR_ROUNDUP(aSize, 8);
// if the size makes the stack overflow. Grab another block for the stack
if (mPos + aSize >= BLOCK_INCREMENT)
{
NS_ASSERTION(aSize <= BLOCK_INCREMENT,"Requested memory is greater that our block size!!");
if (mCurBlock->mNext == nsnull)
mCurBlock->mNext = new StackBlock();
mCurBlock = mCurBlock->mNext;
mPos = 0;
}
// return the chunk they need.
*aResult = mCurBlock->mBlock + mPos;
mPos += aSize;
return NS_OK;
}
nsresult
StackArena::Pop()
{
// pop off the mark
NS_ASSERTION(mStackTop > 0, "Error Pop called 1 too many times");
mStackTop--;
#ifdef DEBUG
// Mark the "freed" memory with 0xdd to help with debugging of memory
// allocation problems.
{
StackBlock *block = mMarks[mStackTop].mBlock, *block_end = mCurBlock;
size_t pos = mMarks[mStackTop].mPos;
for (; block != block_end; block = block->mNext, pos = 0) {
memset(block->mBlock + pos, 0xdd, sizeof(block->mBlock) - pos);
}
memset(block->mBlock + pos, 0xdd, mPos - pos);
}
#endif
mCurBlock = mMarks[mStackTop].mBlock;
mPos = mMarks[mStackTop].mPos;
return NS_OK;
}
// Uncomment this to disable the frame arena.
//#define DEBUG_TRACEMALLOC_FRAMEARENA 1
// Memory is allocated 4-byte aligned. We have recyclers for chunks up to
// 200 bytes
class FrameArena {
public:
FrameArena(PRUint32 aArenaSize = 4096);
~FrameArena();
// Memory management functions
NS_HIDDEN_(void*) AllocateFrame(size_t aSize);
NS_HIDDEN_(void) FreeFrame(size_t aSize, void* aPtr);
private:
#ifdef DEBUG
// Number of frames in the pool
PRUint32 mFrameCount;
#endif
#if !defined(DEBUG_TRACEMALLOC_FRAMEARENA)
// Underlying arena pool
PLArenaPool mPool;
// The recycler array is sparse with the indices being multiples of 4,
// i.e., 0, 4, 8, 12, 16, 20, ...
void* mRecyclers[gMaxRecycledSize >> 2];
#endif
};
FrameArena::FrameArena(PRUint32 aArenaSize)
#ifdef DEBUG
: mFrameCount(0)
#endif
{
#if !defined(DEBUG_TRACEMALLOC_FRAMEARENA)
// Initialize the arena pool
PL_INIT_ARENA_POOL(&mPool, "FrameArena", aArenaSize);
// Zero out the recyclers array
memset(mRecyclers, 0, sizeof(mRecyclers));
#endif
}
FrameArena::~FrameArena()
{
NS_ASSERTION(mFrameCount == 0,
"Some objects allocated with AllocateFrame were not freed");
#if !defined(DEBUG_TRACEMALLOC_FRAMEARENA)
// Free the arena in the pool and finish using it
PL_FinishArenaPool(&mPool);
#endif
}
void*
FrameArena::AllocateFrame(size_t aSize)
{
void* result = nsnull;
#if defined(DEBUG_TRACEMALLOC_FRAMEARENA)
result = PR_Malloc(aSize);
#else
// Ensure we have correct alignment for pointers. Important for Tru64
aSize = PR_ROUNDUP(aSize, sizeof(void*));
// Check recyclers first
if (aSize < gMaxRecycledSize) {
const int index = aSize >> 2;
result = mRecyclers[index];
if (result) {
// Need to move to the next object
void* next = *((void**)result);
mRecyclers[index] = next;
}
}
if (!result) {
// Allocate a new chunk from the arena
PL_ARENA_ALLOCATE(result, &mPool, aSize);
}
#endif
#ifdef DEBUG
if (result != nsnull)
++mFrameCount;
#endif
return result;
}
void
FrameArena::FreeFrame(size_t aSize, void* aPtr)
{
#ifdef DEBUG
--mFrameCount;
// Mark the memory with 0xdd in DEBUG builds so that there will be
// problems if someone tries to access memory that they've freed.
memset(aPtr, 0xdd, aSize);
#endif
#if defined(DEBUG_TRACEMALLOC_FRAMEARENA)
PR_Free(aPtr);
#else
// Ensure we have correct alignment for pointers. Important for Tru64
aSize = PR_ROUNDUP(aSize, sizeof(void*));
// See if it's a size that we recycle
if (aSize < gMaxRecycledSize) {
const int index = aSize >> 2;
void* currentTop = mRecyclers[index];
mRecyclers[index] = aPtr;
*((void**)aPtr) = currentTop;
}
#ifdef DEBUG_dbaron
else {
fprintf(stderr,
"WARNING: FrameArena::FreeFrame leaking chunk of %d bytes.\n",
aSize);
}
#endif
#endif
}
class PresShellViewEventListener : public nsIScrollPositionListener,
public nsICompositeListener
{
public:
PresShellViewEventListener();
virtual ~PresShellViewEventListener();
NS_DECL_ISUPPORTS
// nsIScrollPositionListener methods
NS_IMETHOD ScrollPositionWillChange(nsIScrollableView *aView, nscoord aX, nscoord aY);
NS_IMETHOD ScrollPositionDidChange(nsIScrollableView *aView, nscoord aX, nscoord aY);
// nsICompositeListener methods
NS_IMETHOD WillRefreshRegion(nsIViewManager *aViewManager,
nsIView *aView,
nsIRenderingContext *aContext,
nsIRegion *aRegion,
PRUint32 aUpdateFlags);
NS_IMETHOD DidRefreshRegion(nsIViewManager *aViewManager,
nsIView *aView,
nsIRenderingContext *aContext,
nsIRegion *aRegion,
PRUint32 aUpdateFlags);
NS_IMETHOD WillRefreshRect(nsIViewManager *aViewManager,
nsIView *aView,
nsIRenderingContext *aContext,
const nsRect *aRect,
PRUint32 aUpdateFlags);
NS_IMETHOD DidRefreshRect(nsIViewManager *aViewManager,
nsIView *aView,
nsIRenderingContext *aContext,
const nsRect *aRect,
PRUint32 aUpdateFlags);
nsresult SetPresShell(nsIPresShell *aPresShell);
private:
nsresult HideCaret();
nsresult RestoreCaretVisibility();
nsIPresShell *mPresShell;
PRBool mWasVisible;
PRInt32 mCallCount;
};
struct nsDOMEventRequest
{
nsIContent* content;
nsEvent* event;
nsDOMEventRequest* next;
};
struct nsAttributeChangeRequest
{
nsIContent* content;
PRInt32 nameSpaceID;
nsIAtom* name;
nsAutoString value;
PRBool notify;
nsAttributeChangeType type;
nsAttributeChangeRequest* next;
};
struct nsCallbackEventRequest
{
nsIReflowCallback* callback;
nsCallbackEventRequest* next;
};
PRInt32 nsDummyLayoutRequest::gRefCnt;
nsIURI* nsDummyLayoutRequest::gURI;
NS_IMPL_ADDREF(nsDummyLayoutRequest)
NS_IMPL_RELEASE(nsDummyLayoutRequest)
NS_IMPL_QUERY_INTERFACE2(nsDummyLayoutRequest, nsIRequest, nsIChannel)
nsresult
nsDummyLayoutRequest::Create(nsIRequest** aResult, nsIPresShell* aPresShell)
{
*aResult = new nsDummyLayoutRequest(aPresShell);
if (!*aResult)
return NS_ERROR_OUT_OF_MEMORY;
NS_ADDREF(*aResult);
return NS_OK;
}
nsDummyLayoutRequest::nsDummyLayoutRequest(nsIPresShell* aPresShell)
{
if (gRefCnt++ == 0) {
nsresult rv;
rv = NS_NewURI(&gURI, "about:layout-dummy-request", nsnull);
NS_ASSERTION(NS_SUCCEEDED(rv), "unable to create about:layout-dummy-request");
}
mPresShell = do_GetWeakReference(aPresShell);
}
nsDummyLayoutRequest::~nsDummyLayoutRequest()
{
if (--gRefCnt == 0) {
NS_IF_RELEASE(gURI);
}
}
NS_IMETHODIMP
nsDummyLayoutRequest::Cancel(nsresult status)
{
// Cancel layout
nsresult rv = NS_OK;
nsCOMPtr<nsIPresShell> presShell = do_QueryReferent(mPresShell);
if (presShell) {
rv = presShell->CancelAllReflowCommands();
}
return rv;
}
// ----------------------------------------------------------------------------
/**
* Used to build and maintain the incremental reflow tree, and
* dispatch incremental reflows to individual reflow roots.
*/
class IncrementalReflow
{
public:
~IncrementalReflow();
/**
* Add a reflow command to the set of commands that are to be
* dispatched in the incremental reflow.
*/
enum AddCommandResult {
eEnqueued, // the command was successfully added
eTryLater, // the command could not be added; try again
eCancel, // the command was not added; delete it
eOOM // Out of memory.
};
AddCommandResult
AddCommand(nsPresContext *aPresContext,
nsHTMLReflowCommand *aCommand);
/**
* Dispatch the incremental reflow.
*/
void
Dispatch(nsPresContext *aPresContext,
nsHTMLReflowMetrics &aDesiredSize,
const nsSize &aMaxSize,
nsIRenderingContext &aRendContext);
#ifdef NS_DEBUG
/**
* Dump the incremental reflow state.
*/
void
Dump(nsPresContext *aPresContext) const;
#endif
protected:
/**
* The set of incremental reflow roots.
*/
nsAutoVoidArray mRoots;
};
IncrementalReflow::~IncrementalReflow()
{
for (PRInt32 i = mRoots.Count() - 1; i >= 0; --i)
delete NS_STATIC_CAST(nsReflowPath *, mRoots[i]);
}
void
IncrementalReflow::Dispatch(nsPresContext *aPresContext,
nsHTMLReflowMetrics &aDesiredSize,
const nsSize &aMaxSize,
nsIRenderingContext &aRendContext)
{
for (PRInt32 i = mRoots.Count() - 1; i >= 0; --i) {
// Send an incremental reflow notification to the first frame in the
// path.
nsReflowPath *path = NS_STATIC_CAST(nsReflowPath *, mRoots[i]);
nsIFrame *first = path->mFrame;
nsIFrame* root = aPresContext->PresShell()->FrameManager()->GetRootFrame();
first->WillReflow(aPresContext);
nsContainerFrame::PositionFrameView(first);
// If the first frame in the path is the root of the frame
// hierarchy, then use all the available space. If it's simply a
// `reflow root', then use the first frame's size as the available
// space.
nsSize size;
if (first == root)
size = aMaxSize;
else
size = first->GetSize();
nsHTMLReflowState reflowState(aPresContext, first, path,
&aRendContext, size);
nsReflowStatus status;
first->Reflow(aPresContext, aDesiredSize, reflowState, status);
// If an incremental reflow is initiated at a frame other than the
// root frame, then its desired size had better not change!
NS_ASSERTION(first == root ||
(aDesiredSize.width == size.width && aDesiredSize.height == size.height),
"non-root frame's desired size changed during an incremental reflow");
first->SetSize(nsSize(aDesiredSize.width, aDesiredSize.height));
nsContainerFrame::SyncFrameViewAfterReflow(aPresContext, first, first->GetView(),
&aDesiredSize.mOverflowArea);
first->DidReflow(aPresContext, nsnull, NS_FRAME_REFLOW_FINISHED);
}
}
IncrementalReflow::AddCommandResult
IncrementalReflow::AddCommand(nsPresContext *aPresContext,
nsHTMLReflowCommand *aCommand)
{
nsIFrame *frame;
aCommand->GetTarget(frame);
NS_ASSERTION(frame != nsnull, "reflow command with no target");
// Construct the reflow path by walking up the through the frames'
// parent chain until we reach either a `reflow root' or the root
// frame in the frame hierarchy.
nsAutoVoidArray path;
do {
path.AppendElement(frame);
} while (!(frame->GetStateBits() & NS_FRAME_REFLOW_ROOT) &&
(frame = frame->GetParent()) != nsnull);
// Pop off the root, add it to the set if it's not there already.
PRInt32 lastIndex = path.Count() - 1;
nsIFrame *rootFrame = NS_STATIC_CAST(nsIFrame *, path[lastIndex]);
path.RemoveElementAt(lastIndex);
// Prevent an incremental reflow from being posted inside a reflow
// root if the reflow root's container has not yet been reflowed.
// This can cause problems like bug 228156.
if (rootFrame->GetParent() &&
(rootFrame->GetParent()->GetStateBits() & NS_FRAME_FIRST_REFLOW)) {
return eCancel;
}
nsReflowPath *root = nsnull;
PRInt32 i;
for (i = mRoots.Count() - 1; i >= 0; --i) {
nsReflowPath *r = NS_STATIC_CAST(nsReflowPath *, mRoots[i]);
if (r->mFrame == rootFrame) {
root = r;
break;
}
}
if (! root) {
root = new nsReflowPath(rootFrame);
if (! root)
return eOOM;
root->mReflowCommand = nsnull;
mRoots.AppendElement(root);
}
// Now walk the path from the root to the leaf, adding to the reflow
// tree as necessary.
nsReflowPath *target = root;
for (i = path.Count() - 1; i >= 0; --i) {
nsIFrame *f = NS_STATIC_CAST(nsIFrame *, path[i]);
target = target->EnsureSubtreeFor(f);
// Out of memory. Ugh.
if (! target)
return eOOM;
}
// Place the reflow command in the leaf, if one isn't there already.
if (target->mReflowCommand) {
// XXXwaterson it's probably possible to have some notion of
// `promotion' here that would avoid any re-queuing; for example,
// promote a dirty reflow to a style changed. For now, let's punt
// and not worry about it.
#ifdef NS_DEBUG
if (gVerifyReflowFlags & VERIFY_REFLOW_NOISY_RC)
printf("requeuing command %p because %p was already scheduled "
"for the same frame",
(void*)aCommand, (void*)target->mReflowCommand);
#endif
return eTryLater;
}
target->mReflowCommand = aCommand;
return eEnqueued;
}
#ifdef NS_DEBUG
void
IncrementalReflow::Dump(nsPresContext *aPresContext) const
{
for (PRInt32 i = mRoots.Count() - 1; i >= 0; --i)
NS_STATIC_CAST(nsReflowPath *, mRoots[i])->Dump(aPresContext, stdout, 0);
}
#endif
// ----------------------------------------------------------------------------
struct ReflowCommandEntry : public PLDHashEntryHdr
{
nsHTMLReflowCommand* mCommand;
};
PR_STATIC_CALLBACK(const void *)
ReflowCommandHashGetKey(PLDHashTable *table, PLDHashEntryHdr *entry)
{
ReflowCommandEntry *e = NS_STATIC_CAST(ReflowCommandEntry *, entry);
return e->mCommand;
}
PR_STATIC_CALLBACK(PLDHashNumber)
ReflowCommandHashHashKey(PLDHashTable *table, const void *key)
{
const nsHTMLReflowCommand* command =
NS_STATIC_CAST(const nsHTMLReflowCommand*, key);
// The target is going to be reasonably unique, if we shift out the
// always-zero low-order bits, the type comes from an enum and we just don't
// have that many types, and the child list name is either null or has the
// same high-order bits as all the other child list names.
return
(NS_PTR_TO_INT32(command->GetTarget()) >> 2) ^
(command->Type() << 17) ^
(NS_PTR_TO_INT32(command->GetChildListName()) << 20);
}
PR_STATIC_CALLBACK(PRBool)
ReflowCommandHashMatchEntry(PLDHashTable *table, const PLDHashEntryHdr *entry,
const void *key)
{
const ReflowCommandEntry *e =
NS_STATIC_CAST(const ReflowCommandEntry *, entry);
const nsHTMLReflowCommand *command = e->mCommand;
const nsHTMLReflowCommand *command2 =
NS_STATIC_CAST(const nsHTMLReflowCommand *, key);
return
command->GetTarget() == command2->GetTarget() &&
command->Type() == command2->Type() &&
command->GetChildListName() == command2->GetChildListName();
}
// ----------------------------------------------------------------------------
struct CantRenderReplacedElementEvent;
class PresShell : public nsIPresShell_MOZILLA_1_8_BRANCH2, public nsIViewObserver,
public nsStubDocumentObserver,
public nsISelectionController, public nsIObserver,
public nsSupportsWeakReference
{
public:
friend class nsIPresShell;
PresShell();
NS_DECL_AND_IMPL_ZEROING_OPERATOR_NEW
// nsISupports
NS_DECL_ISUPPORTS
// nsIPresShell
NS_IMETHOD Init(nsIDocument* aDocument,
nsPresContext* aPresContext,
nsIViewManager* aViewManager,
nsStyleSet* aStyleSet,
nsCompatibility aCompatMode);
NS_IMETHOD Destroy();
virtual NS_HIDDEN_(void*) AllocateFrame(size_t aSize);
virtual NS_HIDDEN_(void) FreeFrame(size_t aSize, void* aFreeChunk);
// Dynamic stack memory allocation
NS_IMETHOD PushStackMemory();
NS_IMETHOD PopStackMemory();
NS_IMETHOD AllocateStackMemory(size_t aSize, void** aResult);
NS_IMETHOD GetActiveAlternateStyleSheet(nsString& aSheetTitle);
NS_IMETHOD SelectAlternateStyleSheet(const nsString& aSheetTitle);
NS_IMETHOD ListAlternateStyleSheets(nsStringArray& aTitleList);
NS_IMETHOD SetPreferenceStyleRules(PRBool aForceReflow);
NS_IMETHOD GetSelection(SelectionType aType, nsISelection** aSelection);
NS_IMETHOD SetDisplaySelection(PRInt16 aToggle);
NS_IMETHOD GetDisplaySelection(PRInt16 *aToggle);
NS_IMETHOD ScrollSelectionIntoView(SelectionType aType, SelectionRegion aRegion, PRBool aIsSynchronous);
NS_IMETHOD RepaintSelection(SelectionType aType);
NS_IMETHOD BeginObservingDocument();
NS_IMETHOD EndObservingDocument();
NS_IMETHOD GetDidInitialReflow(PRBool *aDidInitialReflow);
NS_IMETHOD InitialReflow(nscoord aWidth, nscoord aHeight);
NS_IMETHOD ResizeReflow(nscoord aWidth, nscoord aHeight);
NS_IMETHOD StyleChangeReflow();
NS_IMETHOD GetPageSequenceFrame(nsIPageSequenceFrame** aResult) const;
NS_IMETHOD GetPrimaryFrameFor(nsIContent* aContent,
nsIFrame** aPrimaryFrame) const;
NS_IMETHOD GetLayoutObjectFor(nsIContent* aContent,
nsISupports** aResult) const;
NS_IMETHOD GetPlaceholderFrameFor(nsIFrame* aFrame,
nsIFrame** aPlaceholderFrame) const;
NS_IMETHOD AppendReflowCommand(nsIFrame* aTargetFrame,
nsReflowType aReflowType,
nsIAtom* aChildListName);
NS_IMETHOD CancelReflowCommand(nsIFrame* aTargetFrame,
nsReflowType* aCmdType);
NS_IMETHOD CancelReflowCommandInternal(nsIFrame* aTargetFrame,
nsReflowType* aCmdType,
PRBool aProcessDummyLayoutRequest = PR_TRUE);
NS_IMETHOD CancelAllReflowCommands();
NS_IMETHOD IsSafeToFlush(PRBool& aIsSafeToFlush);
NS_IMETHOD FlushPendingNotifications(mozFlushType aType);
/**
* Recreates the frames for a node
*/
NS_IMETHOD RecreateFramesFor(nsIContent* aContent);
/**
* Post a request to handle a DOM event after Reflow has finished.
*/
NS_IMETHOD PostDOMEvent(nsIContent* aContent, nsEvent* aEvent);
/**
* Post a request to set and attribute after reflow has finished.
*/
NS_IMETHOD PostAttributeChange(nsIContent* aContent,
PRInt32 aNameSpaceID,
nsIAtom* aName,
const nsString& aValue,
PRBool aNotify,
nsAttributeChangeType aType);
/**
* Post a callback that should be handled after reflow has finished.
*/
NS_IMETHOD PostReflowCallback(nsIReflowCallback* aCallback);
NS_IMETHOD CancelReflowCallback(nsIReflowCallback* aCallback);
/**
* Reflow batching
*/
NS_IMETHOD BeginReflowBatching();
NS_IMETHOD EndReflowBatching(PRBool aFlushPendingReflows);
NS_IMETHOD GetReflowBatchingStatus(PRBool* aBatch);
NS_IMETHOD ClearFrameRefs(nsIFrame* aFrame);
NS_IMETHOD CreateRenderingContext(nsIFrame *aFrame,
nsIRenderingContext** aContext);
NS_IMETHOD CantRenderReplacedElement(nsIFrame* aFrame);
NS_IMETHOD GoToAnchor(const nsAString& aAnchorName, PRBool aScroll);
NS_IMETHOD ScrollFrameIntoView(nsIFrame *aFrame,
PRIntn aVPercent,
PRIntn aHPercent) const;
NS_IMETHOD SetIgnoreFrameDestruction(PRBool aIgnore);
NS_IMETHOD NotifyDestroyingFrame(nsIFrame* aFrame);
NS_IMETHOD DoCopy();
NS_IMETHOD GetSelectionForCopy(nsISelection** outSelection);
NS_IMETHOD GetLinkLocation(nsIDOMNode* aNode, nsAString& aLocationString);
NS_IMETHOD DoGetContents(const nsACString& aMimeType, PRUint32 aFlags, PRBool aSelectionOnly, nsAString& outValue);
NS_IMETHOD CaptureHistoryState(nsILayoutHistoryState** aLayoutHistoryState, PRBool aLeavingPage);
NS_IMETHOD GetGeneratedContentIterator(nsIContent* aContent,
GeneratedContentType aType,
nsIContentIterator** aIterator) const;
NS_IMETHOD SetAnonymousContentFor(nsIContent* aContent, nsISupportsArray* aAnonymousElements);
NS_IMETHOD GetAnonymousContentFor(nsIContent* aContent, nsISupportsArray** aAnonymousElements);
NS_IMETHOD ReleaseAnonymousContent();
NS_IMETHOD IsPaintingSuppressed(PRBool* aResult);
NS_IMETHOD UnsuppressPainting();
NS_IMETHOD DisableThemeSupport();
virtual PRBool IsThemeSupportEnabled();
virtual nsresult GetAgentStyleSheets(nsCOMArray<nsIStyleSheet>& aSheets);
virtual nsresult SetAgentStyleSheets(const nsCOMArray<nsIStyleSheet>& aSheets);
virtual nsresult AddOverrideStyleSheet(nsIStyleSheet *aSheet);
virtual nsresult RemoveOverrideStyleSheet(nsIStyleSheet *aSheet);
NS_IMETHOD HandleEventWithTarget(nsEvent* aEvent, nsIFrame* aFrame, nsIContent* aContent, PRUint32 aFlags, nsEventStatus* aStatus);
NS_IMETHOD GetEventTargetFrame(nsIFrame** aFrame);
NS_IMETHOD GetEventTargetContent(nsEvent* aEvent, nsIContent** aContent);
NS_IMETHOD IsReflowLocked(PRBool* aIsLocked);
virtual nsresult ReconstructFrames(void);
virtual void Freeze();
virtual void Thaw();
#ifdef IBMBIDI
NS_IMETHOD SetCaretBidiLevel(PRUint8 aLevel);
NS_IMETHOD GetCaretBidiLevel(PRUint8 *aOutLevel);
NS_IMETHOD UndefineCaretBidiLevel();
NS_IMETHOD BidiStyleChangeReflow();
#endif
virtual void HidePopups();
virtual void BlockFlushing();
virtual void UnblockFlushing();
virtual void AddObserver(nsIDocumentObserver* aObserver);
virtual PRBool RemoveObserver(nsIDocumentObserver* aObserver);
//nsIViewObserver interface
NS_IMETHOD Paint(nsIView *aView,
nsIRenderingContext& aRenderingContext,
const nsRect& aDirtyRect);
NS_IMETHOD HandleEvent(nsIView* aView,
nsGUIEvent* aEvent,
nsEventStatus* aEventStatus,
PRBool aForceHandle,
PRBool& aHandled);
NS_IMETHOD HandleDOMEventWithTarget(nsIContent* aTargetContent,
nsEvent* aEvent,
nsEventStatus* aStatus);
NS_IMETHOD ResizeReflow(nsIView *aView, nscoord aWidth, nscoord aHeight);
NS_IMETHOD_(PRBool) IsVisible();
NS_IMETHOD_(void) WillPaint();
// caret handling
NS_IMETHOD GetCaret(nsICaret **aOutCaret);
NS_IMETHOD SetCaretEnabled(PRBool aInEnable);
NS_IMETHOD SetCaretReadOnly(PRBool aReadOnly);
NS_IMETHOD GetCaretEnabled(PRBool *aOutEnabled);
NS_IMETHOD SetCaretVisibilityDuringSelection(PRBool aVisibility);
NS_IMETHOD SetSelectionFlags(PRInt16 aInEnable);
NS_IMETHOD GetSelectionFlags(PRInt16 *aOutEnable);
// nsISelectionController
NS_IMETHOD CharacterMove(PRBool aForward, PRBool aExtend);
NS_IMETHOD WordMove(PRBool aForward, PRBool aExtend);
NS_IMETHOD LineMove(PRBool aForward, PRBool aExtend);
NS_IMETHOD IntraLineMove(PRBool aForward, PRBool aExtend);
NS_IMETHOD PageMove(PRBool aForward, PRBool aExtend);
NS_IMETHOD ScrollPage(PRBool aForward);
NS_IMETHOD ScrollLine(PRBool aForward);
NS_IMETHOD ScrollHorizontal(PRBool aLeft);
NS_IMETHOD CompleteScroll(PRBool aForward);
NS_IMETHOD CompleteMove(PRBool aForward, PRBool aExtend);
NS_IMETHOD SelectAll();
NS_IMETHOD CheckVisibility(nsIDOMNode *node, PRInt16 startOffset, PRInt16 EndOffset, PRBool *_retval);
// nsIDocumentObserver
virtual void BeginUpdate(nsIDocument* aDocument, nsUpdateType aUpdateType);
virtual void EndUpdate(nsIDocument* aDocument, nsUpdateType aUpdateType);
virtual void BeginLoad(nsIDocument* aDocument);
virtual void EndLoad(nsIDocument* aDocument);
virtual void CharacterDataChanged(nsIDocument* aDocument,
nsIContent* aContent,
PRBool aAppend);
virtual void ContentStatesChanged(nsIDocument* aDocument,
nsIContent* aContent1,
nsIContent* aContent2,
PRInt32 aStateMask);
virtual void AttributeChanged(nsIDocument* aDocument, nsIContent* aContent,
PRInt32 aNameSpaceID, nsIAtom* aAttribute,
PRInt32 aModType);
virtual void ContentAppended(nsIDocument* aDocument, nsIContent* aContainer,
PRInt32 aNewIndexInContainer);
virtual void ContentInserted(nsIDocument* aDocument, nsIContent* aContainer,
nsIContent* aChild, PRInt32 aIndexInContainer);
virtual void ContentRemoved(nsIDocument* aDocument, nsIContent* aContainer,
nsIContent* aChild, PRInt32 aIndexInContainer);
virtual void StyleSheetAdded(nsIDocument* aDocument,
nsIStyleSheet* aStyleSheet,
PRBool aDocumentSheet);
virtual void StyleSheetRemoved(nsIDocument* aDocument,
nsIStyleSheet* aStyleSheet,
PRBool aDocumentSheet);
virtual void StyleSheetApplicableStateChanged(nsIDocument* aDocument,
nsIStyleSheet* aStyleSheet,
PRBool aApplicable);
virtual void StyleRuleChanged(nsIDocument* aDocument,
nsIStyleSheet* aStyleSheet,
nsIStyleRule* aOldStyleRule,
nsIStyleRule* aNewStyleRule);
virtual void StyleRuleAdded(nsIDocument* aDocument,
nsIStyleSheet* aStyleSheet,
nsIStyleRule* aStyleRule);
virtual void StyleRuleRemoved(nsIDocument* aDocument,
nsIStyleSheet* aStyleSheet,
nsIStyleRule* aStyleRule);
NS_DECL_NSIOBSERVER
#ifdef MOZ_REFLOW_PERF
NS_IMETHOD DumpReflows();
NS_IMETHOD CountReflows(const char * aName, PRUint32 aType, nsIFrame * aFrame);
NS_IMETHOD PaintCount(const char * aName, nsIRenderingContext* aRenderingContext, nsPresContext* aPresContext, nsIFrame * aFrame, PRUint32 aColor);
NS_IMETHOD SetPaintFrameCount(PRBool aOn);
#endif
#ifdef DEBUG
virtual void ListStyleContexts(nsIFrame *aRootFrame, FILE *out,
PRInt32 aIndent = 0);
virtual void ListStyleSheets(FILE *out, PRInt32 aIndent = 0);
#endif
#ifdef PR_LOGGING
static PRLogModuleInfo* gLog;
#endif
protected:
virtual ~PresShell();
void HandlePostedDOMEvents();
void HandlePostedAttributeChanges();
void HandlePostedReflowCallbacks();
void UnsuppressAndInvalidate();
nsresult ReflowCommandAdded(nsHTMLReflowCommand* aRC);
nsresult ReflowCommandRemoved(nsHTMLReflowCommand* aRC);
// This method should be called after a reflow commands have been
// removed from the queue, but after the state in the presshell is
// such that it's safe to flush (i.e. mIsReflowing == PR_FALSE)
// If we are not reflowing and there are no load-crated reflow commands, then
// the dummyLayoutRequest is removed
void DoneRemovingReflowCommands();
friend struct DummyLayoutRequestEvent;
nsresult AddDummyLayoutRequest(void);
nsresult RemoveDummyLayoutRequest();
friend struct CantRenderReplacedElementEvent;
NS_HIDDEN_(void) DequeuePostedEventFor(nsIFrame* aFrame);
NS_HIDDEN_(CantRenderReplacedElementEvent**)
FindPostedEventFor(nsIFrame* aFrame);
void WillCauseReflow() { ++mChangeNestCount; }
nsresult DidCauseReflow();
void DidDoReflow();
nsresult ProcessReflowCommands(PRBool aInterruptible);
nsresult ClearReflowEventStatus();
void PostReflowEvent();
// Note: when PR_FALSE is returned, AlreadyInQueue assumes the command will
// in fact be added to the queue. If it's not, it needs to be removed from
// mReflowCommandTable (AlreadyInQueue will insert it in that table).
PRBool AlreadyInQueue(nsHTMLReflowCommand* aReflowCommand);
friend struct ReflowEvent;
// Utility to determine if we're in the middle of a drag.
PRBool IsDragInProgress ( ) const ;
// Utility to find which view to scroll.
nsIScrollableView* GetViewToScroll(nsLayoutUtils::Direction aDirection);
PRBool mCaretEnabled;
#ifdef IBMBIDI
PRUint8 mBidiLevel; // The Bidi level of the cursor
nsCOMPtr<nsIBidiKeyboard> mBidiKeyboard;
#endif // IBMBIDI
#ifdef NS_DEBUG
nsresult CloneStyleSet(nsStyleSet* aSet, nsStyleSet** aResult);
PRBool VerifyIncrementalReflow();
PRBool mInVerifyReflow;
#endif
/**
* methods that manage rules that are used to implement the associated preferences
* - initially created for bugs 31816, 20760, 22963
*/
nsresult ClearPreferenceStyleRules(void);
nsresult CreatePreferenceStyleSheet(void);
nsresult SetPrefColorRules(void);
nsresult SetPrefLinkRules(void);
nsresult SetPrefFocusRules(void);
nsresult SetPrefNoScriptRule();
nsresult SetPrefNoFramesRule(void);
// Hide a view if it is a popup
void HideViewIfPopup(nsIView* aView);
nsICSSStyleSheet* mPrefStyleSheet; // mStyleSet owns it but we maintain a ref, may be null
#ifdef DEBUG
PRUint32 mUpdateCount;
#endif
// normal reflow commands
nsVoidArray mReflowCommands;
PLDHashTable mReflowCommandTable;
PRPackedBool mDocumentLoading;
PRPackedBool mIsReflowing;
PRPackedBool mIsDestroying;
PRPackedBool mIsReleasingAnonymousContent;
PRPackedBool mIgnoreFrameDestruction;
PRPackedBool mHaveShutDown;
// This is used to protect ourselves from triggering reflow while in the
// middle of frame construction and the like... it really shouldn't be
// needed, one hopes, but it is for now.
PRUint32 mChangeNestCount;
nsIFrame* mCurrentEventFrame;
nsCOMPtr<nsIContent> mCurrentEventContent;
nsVoidArray mCurrentEventFrameStack;
nsCOMArray<nsIContent> mCurrentEventContentStack;
nsSupportsHashtable* mAnonymousContentTable;
#ifdef NS_DEBUG
nsRect mCurrentTargetRect;
nsIView* mCurrentTargetView;
#endif
nsCOMPtr<nsICaret> mCaret;
PRInt16 mSelectionFlags;
PRPackedBool mBatchReflows; // When set to true, the pres shell batches reflow commands.
// When mDummyLayoutRequestEventPosted is true, we have an event
// posted that will call RemoveDummyLayoutRequest when it fires.
PRPackedBool mDummyLayoutRequestEventPosted;
PresShellViewEventListener *mViewEventListener;
nsCOMPtr<nsIEventQueueService> mEventQueueService;
nsCOMPtr<nsIEventQueue> mReflowEventQueue;
FrameArena mFrameArena;
StackArena* mStackArena;
nsCOMPtr<nsIDragService> mDragService;
PRInt32 mRCCreatedDuringLoad; // Counter to keep track of reflow commands created during doc
// The dummy layout request is used to prevent onload from firing
// until after all the reflows that were posted during document load
// have been processed. The control flow here is the following:
// 1) Any time a reflow command is added while the document is loading, if
// we do not already have a dummy layout request we go ahead and create
// one.
// 2) Any time we've removed all reflow commands that were added during
// document load and have a mDummyLayoutRequest we post an event to
// remove this request. The one exception is when we're destroying the
// presshell; then we don't post an event (see item #4).
// 3) While the event to remove the request is posted,
// mDummyLayoutRequestEventPosted is set to true. It's set to false when
// the event fires, before removing the request. While this boolean is
// set, additional events are _not_ posted.
// 4) Destroy() guarantees that the dummy layout request is removed by
// calling RemoveDummyLayoutRequest(), since we may already have no
// reflow commands around and we revoke our events.
nsCOMPtr<nsIRequest> mDummyLayoutRequest;
CantRenderReplacedElementEvent* mPostedReplaces;
// used for list of posted events and attribute changes. To be done
// after reflow.
nsDOMEventRequest* mFirstDOMEventRequest;
nsDOMEventRequest* mLastDOMEventRequest;
nsAttributeChangeRequest* mFirstAttributeRequest;
nsAttributeChangeRequest* mLastAttributeRequest;
nsCallbackEventRequest* mFirstCallbackEventRequest;
nsCallbackEventRequest* mLastCallbackEventRequest;
PRPackedBool mIsThemeSupportDisabled; // Whether or not form controls should use nsITheme in this shell.
PRPackedBool mIsDocumentGone; // We've been disconnected from the document.
PRPackedBool mPaintingSuppressed; // For all documents we initially lock down painting.
// We will refuse to paint the document until either
// (a) our timer fires or (b) all frames are constructed.
PRPackedBool mShouldUnsuppressPainting; // Indicates that it is safe to unlock painting once all pending
// reflows have been processed.
nsCOMPtr<nsITimer> mPaintSuppressionTimer; // This timer controls painting suppression. Until it fires
// or all frames are constructed, we won't paint anything but
// our <body> background and scrollbars.
#define PAINTLOCK_EVENT_DELAY 250 // 250ms. This is actually
// pref-controlled, but we use this
// value if we fail to get the pref
// for any reason.
static void sPaintSuppressionCallback(nsITimer* aTimer, void* aPresShell); // A callback for the timer.
MOZ_TIMER_DECLARE(mReflowWatch) // Used for measuring time spent in reflow
MOZ_TIMER_DECLARE(mFrameCreationWatch) // Used for measuring time spent in frame creation
#ifdef MOZ_REFLOW_PERF
ReflowCountMgr * mReflowCountMgr;
#endif
// Array of document observers that actually need to observe
// the PresShell. See bug 400421.
// XXXdholbert: The PresShell only passes on document-observer notifications
// for AttributeChanged, ContentAppended, ContentInserted, and
// ContentRemoved. If PresShell has observers with non-null implementations
// of any other observer functions, we need to pass on notifications for
// those, too.
nsAutoVoidArray mObservers;
private:
PRBool InZombieDocument(nsIContent *aContent);
nsresult RetargetEventToParent(nsIView *aView, nsGUIEvent* aEvent,
nsEventStatus* aEventStatus, PRBool aForceHandle,
PRBool& aHandled, nsIContent *aZombieFocusedContent);
void FreeDynamicStack();
//helper funcs for event handling
nsIFrame* GetCurrentEventFrame();
void PushCurrentEventInfo(nsIFrame* aFrame, nsIContent* aContent);
void PopCurrentEventInfo();
nsresult HandleEventInternal(nsEvent* aEvent, nsIView* aView, PRUint32 aFlags, nsEventStatus *aStatus);
//help funcs for resize events
void CreateResizeEventTimer();
void KillResizeEventTimer();
void FireResizeEvent();
static void sResizeEventCallback(nsITimer* aTimer, void* aPresShell) ;
nsCOMPtr<nsITimer> mResizeEventTimer;
typedef void (*nsPluginEnumCallback)(PresShell*, nsIContent*);
void EnumeratePlugins(nsIDOMDocument *aDocument,
const nsString &aPluginTag,
nsPluginEnumCallback aCallback);
};
// Based on NS_DOCUMENT_NOTIFY_OBSERVERS
#define NS_PRESSHELL_NOTIFY_OBSERVERS(func_, params_) \
do { \
for (PRInt32 i_ = 0; i_ < mObservers.Count(); ++i_) { \
nsIDocumentObserver* obs_ = NS_STATIC_CAST(nsIDocumentObserver*, \
mObservers[i_]); \
obs_ -> func_ params_ ; \
} \
} while (0)
#ifdef PR_LOGGING
PRLogModuleInfo* PresShell::gLog;
#endif
#ifdef NS_DEBUG
static void
VerifyStyleTree(nsPresContext* aPresContext, nsFrameManager* aFrameManager)
{
if (nsIFrameDebug::GetVerifyStyleTreeEnable()) {
nsIFrame* rootFrame = aFrameManager->GetRootFrame();
aFrameManager->DebugVerifyStyleTree(rootFrame);
}
}
#define VERIFY_STYLE_TREE VerifyStyleTree(mPresContext, FrameManager())
#else
#define VERIFY_STYLE_TREE
#endif
static PRBool gVerifyReflowEnabled;
PRBool
nsIPresShell::GetVerifyReflowEnable()
{
#ifdef NS_DEBUG
static PRBool firstTime = PR_TRUE;
if (firstTime) {
firstTime = PR_FALSE;
char* flags = PR_GetEnv("GECKO_VERIFY_REFLOW_FLAGS");
if (flags) {
PRBool error = PR_FALSE;
for (;;) {
char* comma = PL_strchr(flags, ',');
if (comma)
*comma = '\0';
PRBool found = PR_FALSE;
const VerifyReflowFlags* flag = gFlags;
const VerifyReflowFlags* limit = gFlags + NUM_VERIFY_REFLOW_FLAGS;
while (flag < limit) {
if (PL_strcasecmp(flag->name, flags) == 0) {
gVerifyReflowFlags |= flag->bit;
found = PR_TRUE;
break;
}
++flag;
}
if (! found)
error = PR_TRUE;
if (! comma)
break;
*comma = ',';
flags = comma + 1;
}
if (error)
ShowVerifyReflowFlags();
}
if (VERIFY_REFLOW_ON & gVerifyReflowFlags) {
gVerifyReflowEnabled = PR_TRUE;
}
printf("Note: verifyreflow is %sabled",
gVerifyReflowEnabled ? "en" : "dis");
if (VERIFY_REFLOW_NOISY & gVerifyReflowFlags) {
printf(" (noisy)");
}
if (VERIFY_REFLOW_ALL & gVerifyReflowFlags) {
printf(" (all)");
}
if (VERIFY_REFLOW_DUMP_COMMANDS & gVerifyReflowFlags) {
printf(" (show reflow commands)");
}
if (VERIFY_REFLOW_NOISY_RC & gVerifyReflowFlags) {
printf(" (noisy reflow commands)");
if (VERIFY_REFLOW_REALLY_NOISY_RC & gVerifyReflowFlags) {
printf(" (REALLY noisy reflow commands)");
}
}
printf("\n");
}
#endif
return gVerifyReflowEnabled;
}
void
nsIPresShell::SetVerifyReflowEnable(PRBool aEnabled)
{
gVerifyReflowEnabled = aEnabled;
}
PRInt32
nsIPresShell::GetVerifyReflowFlags()
{
#ifdef NS_DEBUG
return gVerifyReflowFlags;
#else
return 0;
#endif
}
void
nsIPresShell_MOZILLA_1_8_BRANCH::AddWeakFrame(nsWeakFrame* aWeakFrame)
{
if (aWeakFrame->GetFrame()) {
aWeakFrame->GetFrame()->AddStateBits(NS_FRAME_EXTERNAL_REFERENCE);
}
aWeakFrame->SetPreviousWeakFrame(mWeakFrames);
mWeakFrames = aWeakFrame;
}
void
nsIPresShell_MOZILLA_1_8_BRANCH::RemoveWeakFrame(nsWeakFrame* aWeakFrame)
{
if (mWeakFrames == aWeakFrame) {
mWeakFrames = aWeakFrame->GetPreviousWeakFrame();
return;
}
nsWeakFrame* nextWeak = mWeakFrames;
while (nextWeak && nextWeak->GetPreviousWeakFrame() != aWeakFrame) {
nextWeak = nextWeak->GetPreviousWeakFrame();
}
if (nextWeak) {
nextWeak->SetPreviousWeakFrame(aWeakFrame->GetPreviousWeakFrame());
}
}
//----------------------------------------------------------------------
nsresult
NS_NewPresShell(nsIPresShell** aInstancePtrResult)
{
NS_PRECONDITION(nsnull != aInstancePtrResult, "null ptr");
if (nsnull == aInstancePtrResult) {
return NS_ERROR_NULL_POINTER;
}
PresShell* it = new PresShell();
if (nsnull == it) {
return NS_ERROR_OUT_OF_MEMORY;
}
return it->QueryInterface(NS_GET_IID(nsIPresShell),
(void **) aInstancePtrResult);
}
PresShell::PresShell()
#ifdef IBMBIDI
: mBidiLevel(BIDI_LEVEL_UNDEFINED)
#endif
{
mIsAccessibilityActive = PR_FALSE;
mSelection = nsnull;
#ifdef MOZ_REFLOW_PERF
mReflowCountMgr = new ReflowCountMgr();
mReflowCountMgr->SetPresContext(mPresContext);
mReflowCountMgr->SetPresShell(this);
#endif
#ifdef IBMBIDI
mBidiLevel = BIDI_LEVEL_UNDEFINED;
#endif
#ifdef PR_LOGGING
if (! gLog)
gLog = PR_NewLogModule("PresShell");
#endif
mSelectionFlags = nsISelectionDisplay::DISPLAY_TEXT | nsISelectionDisplay::DISPLAY_IMAGES;
mIsThemeSupportDisabled = PR_FALSE;
mIsReleasingAnonymousContent = PR_FALSE;
new (this) nsFrameManager();
}
NS_IMPL_ISUPPORTS9(PresShell, nsIPresShell, nsIPresShell_MOZILLA_1_8_BRANCH,
nsIPresShell_MOZILLA_1_8_BRANCH2, nsIDocumentObserver,
nsIViewObserver, nsISelectionController,
nsISelectionDisplay, nsIObserver, nsISupportsWeakReference)
PresShell::~PresShell()
{
if (!mHaveShutDown) {
NS_NOTREACHED("Someone did not call nsIPresShell::destroy");
Destroy();
}
NS_ASSERTION(mCurrentEventContentStack.Count() == 0,
"Huh, event content left on the stack in pres shell dtor!");
NS_ASSERTION(mFirstDOMEventRequest == nsnull &&
mLastDOMEventRequest == nsnull &&
mFirstAttributeRequest == nsnull &&
mLastAttributeRequest == nsnull &&
mFirstCallbackEventRequest == nsnull &&
mLastCallbackEventRequest == nsnull,
"post-reflow queues not empty. This means we're leaking");
delete mStyleSet;
delete mFrameConstructor;
mCurrentEventContent = nsnull;
// if we allocated any stack memory free it.
FreeDynamicStack();
NS_IF_RELEASE(mPresContext);
NS_IF_RELEASE(mDocument);
NS_IF_RELEASE(mSelection);
}
/**
* Initialize the presentation shell. Create view manager and style
* manager.
*/
NS_IMETHODIMP
PresShell::Init(nsIDocument* aDocument,
nsPresContext* aPresContext,
nsIViewManager* aViewManager,
nsStyleSet* aStyleSet,
nsCompatibility aCompatMode)
{
NS_PRECONDITION(nsnull != aDocument, "null ptr");
NS_PRECONDITION(nsnull != aPresContext, "null ptr");
NS_PRECONDITION(nsnull != aViewManager, "null ptr");
if ((nsnull == aDocument) || (nsnull == aPresContext) ||
(nsnull == aViewManager)) {
return NS_ERROR_NULL_POINTER;
}
if (mDocument) {
return NS_ERROR_ALREADY_INITIALIZED;
}
mDocument = aDocument;
NS_ADDREF(mDocument);
mViewManager = aViewManager;
// Create our frame constructor.
mFrameConstructor = new nsCSSFrameConstructor(mDocument, this);
NS_ENSURE_TRUE(mFrameConstructor, NS_ERROR_OUT_OF_MEMORY);
// The document viewer owns both view manager and pres shell.
mViewManager->SetViewObserver(this);
// Bind the context to the presentation shell.
mPresContext = aPresContext;
NS_ADDREF(mPresContext);
aPresContext->SetShell(this);
// Create our reflow command hashtable
static PLDHashTableOps reflowCommandOps =
{
PL_DHashAllocTable,
PL_DHashFreeTable,
ReflowCommandHashGetKey,
ReflowCommandHashHashKey,
ReflowCommandHashMatchEntry,
PL_DHashMoveEntryStub,
PL_DHashClearEntryStub,
PL_DHashFinalizeStub
};
if (!PL_DHashTableInit(&mReflowCommandTable, &reflowCommandOps,
nsnull, sizeof(ReflowCommandEntry), 16)) {
mReflowCommandTable.ops = nsnull;
return NS_ERROR_OUT_OF_MEMORY;
}
// Now we can initialize the style set.
nsresult result = aStyleSet->Init(aPresContext);
NS_ENSURE_SUCCESS(result, result);
// From this point on, any time we return an error we need to make
// sure to null out mStyleSet first, since an error return from this
// method will cause the caller to delete the style set, so we don't
// want to delete it in our destructor.
mStyleSet = aStyleSet;
// Set the compatibility mode after attaching the pres context and
// style set, but before creating any frames.
mPresContext->SetCompatibilityMode(aCompatMode);
// setup the preference style rules (no forced reflow), and do it
// before creating any frames.
SetPreferenceStyleRules(PR_FALSE);
result = CallCreateInstance(kFrameSelectionCID, &mSelection);
if (NS_FAILED(result)) {
mStyleSet = nsnull;
return result;
}
// Create and initialize the frame manager
result = FrameManager()->Init(this, mStyleSet);
if (NS_FAILED(result)) {
NS_WARNING("Frame manager initialization failed");
mStyleSet = nsnull;
return result;
}
result = mSelection->Init(this, nsnull);
if (NS_FAILED(result)) {
mStyleSet = nsnull;
return result;
}
// Important: this has to happen after the selection has been set up
#ifdef SHOW_CARET
// make the caret
nsresult err = NS_NewCaret(getter_AddRefs(mCaret));
if (NS_SUCCEEDED(err))
{
mCaret->Init(this);
}
//SetCaretEnabled(PR_TRUE); // make it show in browser windows
#endif
//set up selection to be displayed in document
SetDisplaySelection(nsISelectionController::SELECTION_DISABLED);
mEventQueueService = do_GetService(kEventQueueServiceCID, &result);
if (!mEventQueueService) {
NS_WARNING("couldn't get event queue service");
mStyleSet = nsnull;
return NS_ERROR_FAILURE;
}
if (gMaxRCProcessingTime == -1) {
gMaxRCProcessingTime =
nsContentUtils::GetIntPref("layout.reflow.timeslice",
NS_MAX_REFLOW_TIME);
gAsyncReflowDuringDocLoad =
nsContentUtils::GetBoolPref("layout.reflow.async.duringDocLoad",
PR_TRUE);
}
{
nsCOMPtr<nsIObserverService> os =
do_GetService("@mozilla.org/observer-service;1", &result);
if (os) {
os->AddObserver(this, NS_LINK_VISITED_EVENT_TOPIC, PR_FALSE);
#ifdef MOZ_XUL
os->AddObserver(this, "chrome-flush-skin-caches", PR_FALSE);
#endif
}
}
// cache the drag service so we can check it during reflows
mDragService = do_GetService("@mozilla.org/widget/dragservice;1");
#ifdef IBMBIDI
mBidiKeyboard = do_GetService("@mozilla.org/widget/bidikeyboard;1");
#endif
#ifdef MOZ_REFLOW_PERF
if (mReflowCountMgr) {
PRBool paintFrameCounts =
nsContentUtils::GetBoolPref("layout.reflow.showframecounts");
PRBool dumpFrameCounts =
nsContentUtils::GetBoolPref("layout.reflow.dumpframecounts");
PRBool dumpFrameByFrameCounts =
nsContentUtils::GetBoolPref("layout.reflow.dumpframebyframecounts");
mReflowCountMgr->SetDumpFrameCounts(dumpFrameCounts);
mReflowCountMgr->SetDumpFrameByFrameCounts(dumpFrameByFrameCounts);
mReflowCountMgr->SetPaintFrameCounts(paintFrameCounts);
}
#endif
return NS_OK;
}
NS_IMETHODIMP
PresShell::Destroy()
{
#ifdef MOZ_REFLOW_PERF
DumpReflows();
if (mReflowCountMgr) {
delete mReflowCountMgr;
mReflowCountMgr = nsnull;
}
#endif
if (mHaveShutDown)
return NS_OK;
{
nsCOMPtr<nsIObserverService> os =
do_GetService("@mozilla.org/observer-service;1");
if (os) {
os->RemoveObserver(this, NS_LINK_VISITED_EVENT_TOPIC);
#ifdef MOZ_XUL
os->RemoveObserver(this, "chrome-flush-skin-caches");
#endif
}
}
// If our paint suppression timer is still active, kill it.
if (mPaintSuppressionTimer) {
mPaintSuppressionTimer->Cancel();
mPaintSuppressionTimer = nsnull;
}
if (mCaret) {
mCaret->Terminate();
mCaret = nsnull;
}
// release our pref style sheet, if we have one still
ClearPreferenceStyleRules();
// free our table of anonymous content
ReleaseAnonymousContent();
mIsDestroying = PR_TRUE;
// We can't release all the event content in
// mCurrentEventContentStack here since there might be code on the
// stack that will release the event content too. Double release
// bad!
// The frames will be torn down, so remove them from the current
// event frame stack (since they'd be dangling references if we'd
// leave them in) and null out the mCurrentEventFrame pointer as
// well.
mCurrentEventFrame = nsnull;
PRInt32 i, count = mCurrentEventFrameStack.Count();
for (i = 0; i < count; i++) {
mCurrentEventFrameStack.ReplaceElementAt(nsnull, i);
}
if (mViewManager) {
// Clear the view manager's weak pointer back to |this| in case it
// was leaked.
mViewManager->SetViewObserver(nsnull);
mViewManager = nsnull;
}
mStyleSet->BeginShutdown(mPresContext);
// This shell must be removed from the document before the frame
// hierarchy is torn down to avoid finding deleted frames through
// this presshell while the frames are being torn down
if (mDocument) {
mDocument->DeleteShell(this);
}
// Revoke pending events. We need to do this and cancel reflow commands
// before we destroy the frame manager, since apparently frame destruction
// sometimes spins the event queue when plug-ins are involved(!).
mPostedReplaces = nsnull;
mReflowEventQueue = nsnull;
nsCOMPtr<nsIEventQueue> eventQueue;
mEventQueueService->GetSpecialEventQueue(nsIEventQueueService::UI_THREAD_EVENT_QUEUE,
getter_AddRefs(eventQueue));
eventQueue->RevokeEvents(this);
CancelAllReflowCommands();
// Destroy the frame manager. This will destroy the frame hierarchy
mFrameConstructor->WillDestroyFrameTree();
FrameManager()->Destroy();
NS_WARN_IF_FALSE(!mWeakFrames, "Weak frames alive after destroying FrameManager");
while (mWeakFrames) {
mWeakFrames->Clear(this);
}
// Let the style set do its cleanup.
mStyleSet->Shutdown(mPresContext);
if (mPresContext) {
// Clear out the prescontext's property table -- since our frame tree is
// now dead, we shouldn't be looking up any more properties in that table.
// We want to do this before we call SetShell() on the prescontext, so
// property destructors can usefully call GetPresShell() on the
// prescontext.
mPresContext->PropertyTable()->DeleteAllProperties();
// We hold a reference to the pres context, and it holds a weak link back
// to us. To avoid the pres context having a dangling reference, set its
// pres shell to NULL
mPresContext->SetShell(nsnull);
// Clear the link handler (weak reference) as well
mPresContext->SetLinkHandler(nsnull);
}
if (mViewEventListener) {
mViewEventListener->SetPresShell((nsIPresShell*)nsnull);
NS_RELEASE(mViewEventListener);
}
RemoveDummyLayoutRequest();
KillResizeEventTimer();
// Now that mReflowCommandTable won't be accessed anymore, finish it
if (mReflowCommandTable.ops) {
PL_DHashTableFinish(&mReflowCommandTable);
}
mHaveShutDown = PR_TRUE;
return NS_OK;
}
// Dynamic stack memory allocation
NS_IMETHODIMP
PresShell::PushStackMemory()
{
if (!mStackArena) {
mStackArena = new StackArena();
if (!mStackArena)
return NS_ERROR_OUT_OF_MEMORY;
}
return mStackArena->Push();
}
NS_IMETHODIMP
PresShell::PopStackMemory()
{
NS_ENSURE_TRUE(mStackArena, NS_ERROR_UNEXPECTED);
return mStackArena->Pop();
}
NS_IMETHODIMP
PresShell::AllocateStackMemory(size_t aSize, void** aResult)
{
if (!mStackArena) {
mStackArena = new StackArena();
if (!mStackArena)
return NS_ERROR_OUT_OF_MEMORY;
}
return mStackArena->Allocate(aSize, aResult);
}
void
PresShell::FreeDynamicStack()
{
if (mStackArena) {
delete mStackArena;
mStackArena = nsnull;
}
}
void
PresShell::FreeFrame(size_t aSize, void* aPtr)
{
mFrameArena.FreeFrame(aSize, aPtr);
}
void*
PresShell::AllocateFrame(size_t aSize)
{
return mFrameArena.AllocateFrame(aSize);
}
NS_IMETHODIMP
PresShell::GetActiveAlternateStyleSheet(nsString& aSheetTitle)
{ // first non-html sheet in style set that has title
if (mStyleSet) {
PRInt32 count = mStyleSet->SheetCount(nsStyleSet::eDocSheet);
PRInt32 index;
NS_NAMED_LITERAL_STRING(textHtml, "text/html");
for (index = 0; index < count; index++) {
nsIStyleSheet* sheet = mStyleSet->StyleSheetAt(nsStyleSet::eDocSheet,
index);
if (nsnull != sheet) {
nsAutoString type;
sheet->GetType(type);
if (PR_FALSE == type.Equals(textHtml)) {
nsAutoString title;
sheet->GetTitle(title);
if (!title.IsEmpty()) {
aSheetTitle = title;
index = count; // stop looking
}
}
}
}
}
return NS_OK;
}
NS_IMETHODIMP
PresShell::SelectAlternateStyleSheet(const nsString& aSheetTitle)
{
if (mDocument && mStyleSet) {
mStyleSet->BeginUpdate();
PRInt32 count = mDocument->GetNumberOfStyleSheets();
PRInt32 index;
NS_NAMED_LITERAL_STRING(textHtml,"text/html");
for (index = 0; index < count; index++) {
nsIStyleSheet *sheet = mDocument->GetStyleSheetAt(index);
PRBool complete;
sheet->GetComplete(complete);
if (complete) {
nsAutoString type;
sheet->GetType(type);
if (!type.Equals(textHtml)) {
nsAutoString title;
sheet->GetTitle(title);
if (!title.IsEmpty()) {
if (title.Equals(aSheetTitle)) {
mStyleSet->AddDocStyleSheet(sheet, mDocument);
}
else {
mStyleSet->RemoveStyleSheet(nsStyleSet::eDocSheet, sheet);
}
}
}
}
}
mStyleSet->EndUpdate();
ReconstructStyleData();
}
return NS_OK;
}
NS_IMETHODIMP
PresShell::ListAlternateStyleSheets(nsStringArray& aTitleList)
{
// XXX should this be returning incomplete sheets? Probably.
if (mDocument) {
PRInt32 count = mDocument->GetNumberOfStyleSheets();
PRInt32 index;
NS_NAMED_LITERAL_STRING(textHtml,"text/html");
for (index = 0; index < count; index++) {
nsIStyleSheet *sheet = mDocument->GetStyleSheetAt(index);
if (sheet) {
nsAutoString type;
sheet->GetType(type);
if (PR_FALSE == type.Equals(textHtml)) {
nsAutoString title;
sheet->GetTitle(title);
if (!title.IsEmpty()) {
if (-1 == aTitleList.IndexOf(title)) {
aTitleList.AppendString(title);
}
}
}
}
}
}
return NS_OK;
}
void
nsIPresShell::SetAuthorStyleDisabled(PRBool aStyleDisabled)
{
if (aStyleDisabled != mStyleSet->GetAuthorStyleDisabled()) {
mStyleSet->SetAuthorStyleDisabled(aStyleDisabled);
ReconstructStyleData();
}
}
PRBool
nsIPresShell::GetAuthorStyleDisabled()
{
return mStyleSet->GetAuthorStyleDisabled();
}
NS_IMETHODIMP
PresShell::SetPreferenceStyleRules(PRBool aForceReflow)
{
if (!mDocument) {
return NS_ERROR_NULL_POINTER;
}
nsIScriptGlobalObject *globalObj = mDocument->GetScriptGlobalObject();
// If the document doesn't have a global object there's no need to
// notify its presshell about changes to preferences since the
// document is in a state where it doesn't matter any more (see
// DocumentViewerImpl::Close()).
if (!globalObj) {
return NS_ERROR_NULL_POINTER;
}
NS_PRECONDITION(mPresContext, "presContext cannot be null");
if (mPresContext) {
nsresult result = NS_OK;
// first, make sure this is not a chrome shell
nsCOMPtr<nsISupports> container = mPresContext->GetContainer();
if (container) {
nsCOMPtr<nsIDocShellTreeItem> docShell(do_QueryInterface(container, &result));
if (NS_SUCCEEDED(result) && docShell){
PRInt32 docShellType;
result = docShell->GetItemType(&docShellType);
if (NS_SUCCEEDED(result)){
if (nsIDocShellTreeItem::typeChrome == docShellType){
return NS_OK;
}
}
}
}
if (NS_SUCCEEDED(result)) {
#ifdef DEBUG_attinasi
printf("Setting Preference Style Rules:\n");
#endif
// if here, we need to create rules for the prefs
// - this includes the background-color, the text-color,
// the link color, the visited link color and the link-underlining
// first clear any exising rules
result = ClearPreferenceStyleRules();
// now do the color rules
if (NS_SUCCEEDED(result)) {
result = SetPrefColorRules();
}
// now the link rules (must come after the color rules, or links will not be correct color!)
// XXX - when there is both an override and agent pref stylesheet this won't matter,
// as the color rules will be overrides and the links rules will be agent
if (NS_SUCCEEDED(result)) {
result = SetPrefLinkRules();
}
if (NS_SUCCEEDED(result)) {
result = SetPrefFocusRules();
}
if (NS_SUCCEEDED(result)) {
result = SetPrefNoScriptRule();
}
if (NS_SUCCEEDED(result)) {
result = SetPrefNoFramesRule();
}
}
#ifdef DEBUG_attinasi
printf( "Preference Style Rules set: error=%ld\n", (long)result);
#endif
if (aForceReflow){
mPresContext->ClearStyleDataAndReflow();
}
return result;
}
return NS_ERROR_NULL_POINTER;
}
nsresult PresShell::ClearPreferenceStyleRules(void)
{
nsresult result = NS_OK;
if (mPrefStyleSheet) {
NS_ASSERTION(mStyleSet, "null styleset entirely unexpected!");
if (mStyleSet) {
// remove the sheet from the styleset:
// - note that we have to check for success by comparing the count before and after...
#ifdef NS_DEBUG
PRInt32 numBefore = mStyleSet->SheetCount(nsStyleSet::eUserSheet);
NS_ASSERTION(numBefore > 0, "no user stylesheets in styleset, but we have one!");
#endif
mStyleSet->RemoveStyleSheet(nsStyleSet::eUserSheet, mPrefStyleSheet);
#ifdef DEBUG_attinasi
NS_ASSERTION((numBefore - 1) == mStyleSet->GetNumberOfUserStyleSheets(),
"Pref stylesheet was not removed");
printf("PrefStyleSheet removed\n");
#endif
// clear the sheet pointer: it is strictly historical now
NS_RELEASE(mPrefStyleSheet);
}
}
return result;
}
nsresult PresShell::CreatePreferenceStyleSheet(void)
{
NS_ASSERTION(!mPrefStyleSheet, "prefStyleSheet already exists");
nsresult result = CallCreateInstance(kCSSStyleSheetCID, &mPrefStyleSheet);
if (NS_SUCCEEDED(result)) {
NS_ASSERTION(mPrefStyleSheet, "null but no error");
nsCOMPtr<nsIURI> uri;
result = NS_NewURI(getter_AddRefs(uri), "about:PreferenceStyleSheet", nsnull);
if (NS_SUCCEEDED(result)) {
NS_ASSERTION(uri, "null but no error");
nsCOMPtr<nsICSSStyleSheet_MOZILLA_1_8_BRANCH> sheet =
do_QueryInterface(mPrefStyleSheet);
result = sheet->SetURIs18(uri, uri, uri);
if (NS_SUCCEEDED(result)) {
mPrefStyleSheet->SetComplete();
nsCOMPtr<nsIDOMCSSStyleSheet> sheet(do_QueryInterface(mPrefStyleSheet));
if (sheet) {
PRUint32 index;
result = sheet->InsertRule(NS_LITERAL_STRING("@namespace url(http://www.w3.org/1999/xhtml);"),
0, &index);
NS_ENSURE_SUCCESS(result, result);
}
mStyleSet->AppendStyleSheet(nsStyleSet::eUserSheet, mPrefStyleSheet);
}
}
} else {
result = NS_ERROR_OUT_OF_MEMORY;
}
#ifdef DEBUG_attinasi
printf("CreatePrefStyleSheet completed: error=%ld\n",(long)result);
#endif
return result;
}
// XXX We want these after the @namespace rule. Does order matter
// for these rules, or can we call nsICSSStyleRule::StyleRuleCount()
// and just "append"?
static PRUint32 sInsertPrefSheetRulesAt = 1;
nsresult PresShell::SetPrefColorRules(void)
{
NS_ASSERTION(mPresContext,"null prescontext not allowed");
if (mPresContext) {
nsresult result = NS_OK;
// see if we need to create the rules first
PRBool useDocColors =
mPresContext->GetCachedBoolPref(kPresContext_UseDocumentColors);
if (!useDocColors) {
#ifdef DEBUG_attinasi
printf(" - Creating rules for document colors\n");
#endif
// OK, not using document colors, so we have to force the user's colors via style rules
if (!mPrefStyleSheet) {
result = CreatePreferenceStyleSheet();
}
if (NS_SUCCEEDED(result)) {
NS_ASSERTION(mPrefStyleSheet, "prefstylesheet should not be null");
nscolor bgColor = mPresContext->DefaultBackgroundColor();
nscolor textColor = mPresContext->DefaultColor();
// get the DOM interface to the stylesheet
nsCOMPtr<nsIDOMCSSStyleSheet> sheet(do_QueryInterface(mPrefStyleSheet,&result));
if (NS_SUCCEEDED(result)) {
PRUint32 index = 0;
nsAutoString strColor, strBackgroundColor;
// create a rule for background and foreground color and
// add it to the style sheet
// - the rule is !important so it overrides all but author
// important rules (when put into an agent stylesheet) and
// all (even author important) when put into an override stylesheet
///////////////////////////////////////////////////////////////
// - default colors: ':root {color:#RRGGBB !important;
// background: #RRGGBB !important;}'
ColorToString(textColor,strColor);
ColorToString(bgColor,strBackgroundColor);
result = sheet->InsertRule(NS_LITERAL_STRING(":root {color:") +
strColor +
NS_LITERAL_STRING(" !important; ") +
NS_LITERAL_STRING("border-color: -moz-use-text-color !important; ") +
NS_LITERAL_STRING("background:") +
strBackgroundColor +
NS_LITERAL_STRING(" !important; }"),
sInsertPrefSheetRulesAt, &index);
NS_ENSURE_SUCCESS(result, result);
///////////////////////////////////////////////////////////////
// - everything else inherits the color, and has transparent background
result = sheet->InsertRule(NS_LITERAL_STRING("* {color: inherit !important; border-color: -moz-use-text-color !important; background: transparent !important;} "),
sInsertPrefSheetRulesAt, &index);
}
}
}
return result;
} else {
return NS_ERROR_FAILURE;
}
}
nsresult
PresShell::SetPrefNoScriptRule()
{
nsresult rv = NS_OK;
// also handle the case where print is done from print preview
// see bug #342439 for more details
PRBool scriptEnabled = mDocument->IsScriptEnabled() ||
((mPresContext->Type() == nsPresContext::eContext_PrintPreview ||
mPresContext->Type() == nsPresContext::eContext_Print) &&
NS_PTR_TO_INT32(mDocument->GetProperty(
nsLayoutAtoms::scriptEnabledBeforePrintPreview)));
if (scriptEnabled) {
if (!mPrefStyleSheet) {
rv = CreatePreferenceStyleSheet();
NS_ENSURE_SUCCESS(rv, rv);
}
// get the DOM interface to the stylesheet
nsCOMPtr<nsIDOMCSSStyleSheet> sheet(do_QueryInterface(mPrefStyleSheet, &rv));
NS_ENSURE_SUCCESS(rv, rv);
PRUint32 index = 0;
rv = sheet->InsertRule(NS_LITERAL_STRING("noscript{display:none!important}"),
sInsertPrefSheetRulesAt, &index);
}
return rv;
}
nsresult PresShell::SetPrefNoFramesRule(void)
{
NS_ASSERTION(mPresContext,"null prescontext not allowed");
if (!mPresContext) {
return NS_ERROR_FAILURE;
}
nsresult rv = NS_OK;
if (!mPrefStyleSheet) {
rv = CreatePreferenceStyleSheet();
NS_ENSURE_SUCCESS(rv, rv);
}
NS_ASSERTION(mPrefStyleSheet, "prefstylesheet should not be null");
// get the DOM interface to the stylesheet
nsCOMPtr<nsIDOMCSSStyleSheet> sheet(do_QueryInterface(mPrefStyleSheet, &rv));
NS_ENSURE_SUCCESS(rv, rv);
PRBool allowSubframes = PR_TRUE;
nsCOMPtr<nsISupports> container = mPresContext->GetContainer();
nsCOMPtr<nsIDocShell> docShell(do_QueryInterface(container));
if (docShell) {
docShell->GetAllowSubframes(&allowSubframes);
}
if (!allowSubframes) {
PRUint32 index = 0;
rv = sheet->InsertRule(NS_LITERAL_STRING("noframes{display:block}"),
sInsertPrefSheetRulesAt, &index);
NS_ENSURE_SUCCESS(rv, rv);
rv = sheet->InsertRule(NS_LITERAL_STRING("frame, frameset, iframe {display:none!important}"),
sInsertPrefSheetRulesAt, &index);
}
return rv;
}
nsresult PresShell::SetPrefLinkRules(void)
{
NS_ASSERTION(mPresContext,"null prescontext not allowed");
if (!mPresContext) {
return NS_ERROR_FAILURE;
}
nsresult rv = NS_OK;
if (!mPrefStyleSheet) {
rv = CreatePreferenceStyleSheet();
NS_ENSURE_SUCCESS(rv, rv);
}
NS_ASSERTION(mPrefStyleSheet, "prefstylesheet should not be null");
// get the DOM interface to the stylesheet
nsCOMPtr<nsIDOMCSSStyleSheet> sheet(do_QueryInterface(mPrefStyleSheet, &rv));
NS_ENSURE_SUCCESS(rv, rv);
// support default link colors:
// this means the link colors need to be overridable,
// which they are if we put them in the agent stylesheet,
// though if using an override sheet this will cause authors grief still
// In the agent stylesheet, they are !important when we are ignoring document colors
nscolor linkColor(mPresContext->DefaultLinkColor());
nscolor activeColor(mPresContext->DefaultActiveLinkColor());
nscolor visitedColor(mPresContext->DefaultVisitedLinkColor());
PRBool useDocColors =
mPresContext->GetCachedBoolPref(kPresContext_UseDocumentColors);
NS_NAMED_LITERAL_STRING(notImportantStr, "}");
NS_NAMED_LITERAL_STRING(importantStr, "!important}");
const nsAString& ruleClose = useDocColors ? notImportantStr : importantStr;
PRUint32 index = 0;
nsAutoString strColor;
// insert a rule to color links: '*|*:link {color: #RRGGBB [!important];}'
ColorToString(linkColor, strColor);
rv = sheet->InsertRule(NS_LITERAL_STRING("*|*:link{color:") +
strColor + ruleClose,
sInsertPrefSheetRulesAt, &index);
NS_ENSURE_SUCCESS(rv, rv);
// - visited links: '*|*:visited {color: #RRGGBB [!important];}'
ColorToString(visitedColor, strColor);
rv = sheet->InsertRule(NS_LITERAL_STRING("*|*:visited{color:") +
strColor + ruleClose,
sInsertPrefSheetRulesAt, &index);
NS_ENSURE_SUCCESS(rv, rv);
// - active links: '*|*:-moz-any-link:active {color: #RRGGBB [!important];}'
ColorToString(activeColor, strColor);
rv = sheet->InsertRule(NS_LITERAL_STRING("*|*:-moz-any-link:active{color:") +
strColor + ruleClose,
sInsertPrefSheetRulesAt, &index);
NS_ENSURE_SUCCESS(rv, rv);
PRBool underlineLinks =
mPresContext->GetCachedBoolPref(kPresContext_UnderlineLinks);
if (underlineLinks) {
// create a rule to make underlining happen
// '*|*:-moz-any-link {text-decoration:[underline|none];}'
// no need for important, we want these to be overridable
// NOTE: these must go in the agent stylesheet or they cannot be
// overridden by authors
rv = sheet->InsertRule(NS_LITERAL_STRING("*|*:-moz-any-link{text-decoration:underline}"),
sInsertPrefSheetRulesAt, &index);
} else {
rv = sheet->InsertRule(NS_LITERAL_STRING("*|*:-moz-any-link{text-decoration:none}"),
sInsertPrefSheetRulesAt, &index);
}
return rv;
}
nsresult PresShell::SetPrefFocusRules(void)
{
NS_ASSERTION(mPresContext,"null prescontext not allowed");
nsresult result = NS_OK;
if (!mPresContext)
result = NS_ERROR_FAILURE;
if (NS_SUCCEEDED(result) && !mPrefStyleSheet)
result = CreatePreferenceStyleSheet();
if (NS_SUCCEEDED(result)) {
NS_ASSERTION(mPrefStyleSheet, "prefstylesheet should not be null");
// get the DOM interface to the stylesheet
nsCOMPtr<nsIDOMCSSStyleSheet> sheet(do_QueryInterface(mPrefStyleSheet,&result));
if (NS_SUCCEEDED(result)) {
if (mPresContext->GetUseFocusColors()) {
nscolor focusBackground(mPresContext->FocusBackgroundColor());
nscolor focusText(mPresContext->FocusTextColor());
// insert a rule to make focus the preferred color
PRUint32 index = 0;
nsAutoString strRule, strColor;
///////////////////////////////////////////////////////////////
// - focus: '*:focus
ColorToString(focusText,strColor);
strRule.AppendLiteral("*:focus,*:focus>font {color: ");
strRule.Append(strColor);
strRule.AppendLiteral(" !important; background-color: ");
ColorToString(focusBackground,strColor);
strRule.Append(strColor);
strRule.AppendLiteral(" !important; } ");
// insert the rules
result = sheet->InsertRule(strRule, sInsertPrefSheetRulesAt, &index);
}
PRUint8 focusRingWidth = mPresContext->FocusRingWidth();
PRBool focusRingOnAnything = mPresContext->GetFocusRingOnAnything();
if ((NS_SUCCEEDED(result) && focusRingWidth != 1 && focusRingWidth <= 4 ) || focusRingOnAnything) {
PRUint32 index = 0;
nsAutoString strRule;
if (!focusRingOnAnything)
strRule.AppendLiteral("*|*:link:focus, *|*:visited"); // If we only want focus rings on the normal things like links
strRule.AppendLiteral(":focus {outline: "); // For example 3px dotted WindowText (maximum 4)
strRule.AppendInt(focusRingWidth);
strRule.AppendLiteral("px dotted WindowText !important; } "); // For example 3px dotted WindowText
// insert the rules
result = sheet->InsertRule(strRule, sInsertPrefSheetRulesAt, &index);
NS_ENSURE_SUCCESS(result, result);
if (focusRingWidth != 1) {
// If the focus ring width is different from the default, fix buttons with rings
strRule.AssignLiteral("button::-moz-focus-inner, input[type=\"reset\"]::-moz-focus-inner,");
strRule.AppendLiteral("input[type=\"button\"]::-moz-focus-inner, ");
strRule.AppendLiteral("input[type=\"submit\"]::-moz-focus-inner { padding: 1px 2px 1px 2px; border: ");
strRule.AppendInt(focusRingWidth);
strRule.AppendLiteral("px dotted transparent !important; } ");
result = sheet->InsertRule(strRule, sInsertPrefSheetRulesAt, &index);
NS_ENSURE_SUCCESS(result, result);
strRule.AssignLiteral("button:focus::-moz-focus-inner, input[type=\"reset\"]:focus::-moz-focus-inner,");
strRule.AppendLiteral("input[type=\"button\"]:focus::-moz-focus-inner, input[type=\"submit\"]:focus::-moz-focus-inner {");
strRule.AppendLiteral("border-color: ButtonText !important; }");
result = sheet->InsertRule(strRule, sInsertPrefSheetRulesAt, &index);
}
}
}
}
return result;
}
NS_IMETHODIMP
PresShell::SetDisplaySelection(PRInt16 aToggle)
{
return mSelection->SetDisplaySelection(aToggle);
}
NS_IMETHODIMP
PresShell::GetDisplaySelection(PRInt16 *aToggle)
{
return mSelection->GetDisplaySelection(aToggle);
}
NS_IMETHODIMP
PresShell::GetSelection(SelectionType aType, nsISelection **aSelection)
{
if (!aSelection || !mSelection)
return NS_ERROR_NULL_POINTER;
return mSelection->GetSelection(aType, aSelection);
}
NS_IMETHODIMP
PresShell::ScrollSelectionIntoView(SelectionType aType, SelectionRegion aRegion, PRBool aIsSynchronous)
{
if (!mSelection)
return NS_ERROR_NULL_POINTER;
return mSelection->ScrollSelectionIntoView(aType, aRegion, aIsSynchronous);
}
NS_IMETHODIMP
PresShell::RepaintSelection(SelectionType aType)
{
if (!mSelection)
return NS_ERROR_NULL_POINTER;
return mSelection->RepaintSelection(mPresContext, aType);
}
// Make shell be a document observer
NS_IMETHODIMP
PresShell::BeginObservingDocument()
{
if (mDocument && !mIsDestroying) {
mDocument->AddObserver(this);
if (mIsDocumentGone) {
NS_WARNING("Adding a presshell that was disconnected from the document "
"as a document observer? Sounds wrong...");
mIsDocumentGone = PR_FALSE;
}
}
return NS_OK;
}
// Make shell stop being a document observer
NS_IMETHODIMP
PresShell::EndObservingDocument()
{
// XXXbz do we need to tell the frame constructor that the document
// is gone, perhaps? Except for printing it's NOT gone, sometimes.
mIsDocumentGone = PR_TRUE;
if (mDocument) {
mDocument->RemoveObserver(this);
}
if (mSelection){
nsCOMPtr<nsISelection> domselection;
nsresult result;
result = mSelection->GetSelection(nsISelectionController::SELECTION_NORMAL, getter_AddRefs(domselection));
if (NS_FAILED(result))
return result;
if (!domselection)
return NS_ERROR_UNEXPECTED;
mSelection->ShutDown();
}
return NS_OK;
}
#ifdef DEBUG_kipp
char* nsPresShell_ReflowStackPointerTop;
#endif
static void CheckForFocus(nsPIDOMWindow* aOurWindow,
nsIFocusController* aFocusController,
nsIDocument* aDocument)
{
NS_ASSERTION(aOurWindow->IsOuterWindow(),
"Uh, our window has to be an outer window!");
// Now that we have a root frame, we can set focus on the presshell.
// We do this only if our DOM window is currently focused or is an
// an ancestor of a previously focused window.
if (!aFocusController)
return;
nsCOMPtr<nsIDOMWindowInternal> ourWin = do_QueryInterface(aOurWindow);
nsCOMPtr<nsIDOMWindowInternal> focusedWindow;
aFocusController->GetFocusedWindow(getter_AddRefs(focusedWindow));
if (!focusedWindow) {
// This should never really happen, but if it does, assume
// we can focus ourself to keep the window from being keydead.
focusedWindow = ourWin;
}
// Walk up the document chain, starting with focusedWindow's document.
// We stop walking when we find a document that has a null DOMWindow
// (meaning that the DOMWindow has a new document now) or find ourWin
// as the document's window. We also stop if we hit aDocument, since
// that means there is a child document which loaded before us that's
// already been given focus.
nsCOMPtr<nsIDOMDocument> focusedDOMDoc;
focusedWindow->GetDocument(getter_AddRefs(focusedDOMDoc));
nsCOMPtr<nsIDocument> curDoc = do_QueryInterface(focusedDOMDoc);
if (!curDoc) {
// This can happen if the previously focused DOM window has been
// unhooked from its document during document teardown. We don't
// really have any other information to help us determine where
// focusedWindow fits into the DOM window hierarchy. For now, we'll
// go ahead and allow this window to take focus, so that something
// ends up focused.
curDoc = aDocument;
}
while (curDoc) {
nsPIDOMWindow *curWin = curDoc->GetWindow();
if (!curWin || curWin == ourWin)
break;
curDoc = curDoc->GetParentDocument();
if (curDoc == aDocument)
return;
}
if (!curDoc) {
// We reached the top of the document chain, and did not encounter ourWin
// or a windowless document. So, focus should be unaffected by this
// document load.
return;
}
PRBool active;
aFocusController->GetActive(&active);
if (active)
ourWin->Focus();
// We need to ensure that the focus controller is updated, since it may be
// suppressed when this function is called.
aFocusController->SetFocusedWindow(ourWin);
}
static nsIFrame*
GetRootScrollFrame(nsIFrame* aRootFrame) {
// Ensure root frame is a viewport frame
if (aRootFrame && nsLayoutAtoms::viewportFrame == aRootFrame->GetType()) {
nsIFrame* theFrame = aRootFrame->GetFirstChild(nsnull);
if (theFrame && nsLayoutAtoms::scrollFrame == theFrame->GetType()) {
return theFrame;
}
}
return nsnull;
}
NS_IMETHODIMP
PresShell::GetDidInitialReflow(PRBool *aDidInitialReflow)
{
if (!aDidInitialReflow)
return NS_ERROR_FAILURE;
*aDidInitialReflow = mDidInitialReflow;
return NS_OK;
}
NS_IMETHODIMP
PresShell::InitialReflow(nscoord aWidth, nscoord aHeight)
{
mDidInitialReflow = PR_TRUE;
#ifdef NS_DEBUG
if (VERIFY_REFLOW_NOISY_RC & gVerifyReflowFlags) {
if (mDocument) {
nsIURI *uri = mDocument->GetDocumentURI();
if (uri) {
nsCAutoString url;
uri->GetSpec(url);
printf("*** PresShell::InitialReflow (this=%p, url='%s')\n", (void*)this, url.get());
}
}
}
#endif
if (mCaret)
mCaret->EraseCaret();
NS_ASSERTION(mViewManager, "Should have view manager");
// Painting should be suppressed for the initial reflow, so this won't
// really do anything right now, but it will be useful when we
// start batching widget changes
mViewManager->BeginUpdateViewBatch();
WillCauseReflow();
if (mPresContext) {
nsRect r(0, 0, aWidth, aHeight);
mPresContext->SetVisibleArea(r);
}
nsIContent *root = mDocument ? mDocument->GetRootContent() : nsnull;
// Get the root frame from the frame manager
nsIFrame* rootFrame = FrameManager()->GetRootFrame();
if (root) {
MOZ_TIMER_DEBUGLOG(("Reset and start: Frame Creation: PresShell::InitialReflow(), this=%p\n",
(void*)this));
MOZ_TIMER_RESET(mFrameCreationWatch);
MOZ_TIMER_START(mFrameCreationWatch);
if (!rootFrame) {
// Have style sheet processor construct a frame for the
// precursors to the root content object's frame
mFrameConstructor->ConstructRootFrame(root, &rootFrame);
FrameManager()->SetRootFrame(rootFrame);
}
// Have the style sheet processor construct frame for the root
// content object down
mFrameConstructor->ContentInserted(nsnull, nsnull, root, 0,
nsnull, PR_FALSE);
VERIFY_STYLE_TREE;
MOZ_TIMER_DEBUGLOG(("Stop: Frame Creation: PresShell::InitialReflow(), this=%p\n",
(void*)this));
MOZ_TIMER_STOP(mFrameCreationWatch);
NS_ENSURE_STATE(!mHaveShutDown);
// Run the XBL binding constructors for any new frames we've constructed
// Hold a strong ref to ourselves while we do that
nsCOMPtr<nsIPresShell> kungFuDeathGrip(this);
mDocument->BindingManager()->ProcessAttachedQueue();
// Constructors may have killed us too
NS_ENSURE_STATE(!mHaveShutDown);
// Now flush out pending restyles before we actually reflow, in
// case XBL constructors changed styles somewhere.
mFrameConstructor->ProcessPendingRestyles();
// And that might have run _more_ XBL constructors
NS_ENSURE_STATE(!mHaveShutDown);
// Now reget the root frame, since all that script might have affected it
// somehow. Currently that can't happen, as long as mHaveShutDown is
// false, but let's not rely on that.
rootFrame = FrameManager()->GetRootFrame();
}
if (rootFrame) {
MOZ_TIMER_DEBUGLOG(("Reset and start: Reflow: PresShell::InitialReflow(), this=%p\n",
(void*)this));
MOZ_TIMER_RESET(mReflowWatch);
MOZ_TIMER_START(mReflowWatch);
// Kick off a top-down reflow
NS_FRAME_LOG(NS_FRAME_TRACE_CALLS,
("enter nsPresShell::InitialReflow: %d,%d", aWidth, aHeight));
#ifdef NS_DEBUG
if (nsIFrameDebug::GetVerifyTreeEnable()) {
nsIFrameDebug* frameDebug;
if (NS_SUCCEEDED(rootFrame->QueryInterface(NS_GET_IID(nsIFrameDebug),
(void**)&frameDebug))) {
frameDebug->VerifyTree();
}
}
#endif
#ifdef DEBUG_kipp
nsPresShell_ReflowStackPointerTop = (char*) &aWidth;
#endif
nsRect bounds = mPresContext->GetVisibleArea();
nsSize maxSize(bounds.width, bounds.height);
nsHTMLReflowMetrics desiredSize(nsnull);
nsReflowStatus status;
nsIRenderingContext* rcx = nsnull;
nsresult rv=CreateRenderingContext(rootFrame, &rcx);
if (NS_FAILED(rv)) return rv;
mIsReflowing = PR_TRUE;
nsHTMLReflowState reflowState(mPresContext, rootFrame,
eReflowReason_Initial, rcx, maxSize);
rootFrame->WillReflow(mPresContext);
nsContainerFrame::PositionFrameView(rootFrame);
rootFrame->Reflow(mPresContext, desiredSize, reflowState, status);
rootFrame->SetSize(nsSize(desiredSize.width, desiredSize.height));
mPresContext->SetVisibleArea(nsRect(0,0,desiredSize.width,desiredSize.height));
nsContainerFrame::SyncFrameViewAfterReflow(mPresContext, rootFrame, rootFrame->GetView(),
nsnull);
rootFrame->DidReflow(mPresContext, nsnull, NS_FRAME_REFLOW_FINISHED);
#ifdef NS_DEBUG
if (nsIFrameDebug::GetVerifyTreeEnable()) {
nsIFrameDebug* frameDebug;
if (NS_SUCCEEDED(rootFrame->QueryInterface(NS_GET_IID(nsIFrameDebug),
(void**)&frameDebug))) {
frameDebug->VerifyTree();
}
}
#endif
VERIFY_STYLE_TREE;
NS_IF_RELEASE(rcx);
NS_FRAME_LOG(NS_FRAME_TRACE_CALLS, ("exit nsPresShell::InitialReflow"));
MOZ_TIMER_DEBUGLOG(("Stop: Reflow: PresShell::InitialReflow(), this=%p\n", (void*)this));
MOZ_TIMER_STOP(mReflowWatch);
mIsReflowing = PR_FALSE;
}
DidCauseReflow();
DidDoReflow();
mViewManager->EndUpdateViewBatch(NS_VMREFRESH_NO_SYNC);
if (mViewManager && mCaret && !mViewEventListener) {
nsIScrollableView* scrollingView = nsnull;
mViewManager->GetRootScrollableView(&scrollingView);
if (scrollingView) {
mViewEventListener = new PresShellViewEventListener;
if (!mViewEventListener)
return NS_ERROR_OUT_OF_MEMORY;
NS_ADDREF(mViewEventListener);
mViewEventListener->SetPresShell(this);
scrollingView->AddScrollPositionListener((nsIScrollPositionListener *)mViewEventListener);
mViewManager->AddCompositeListener((nsICompositeListener *)mViewEventListener);
}
}
// For printing, we just immediately unsuppress.
if (!mPresContext->IsPaginated()) {
// Kick off a one-shot timer based off our pref value. When this timer
// fires, if painting is still locked down, then we will go ahead and
// trigger a full invalidate and allow painting to proceed normally.
mPaintingSuppressed = PR_TRUE;
mPaintSuppressionTimer = do_CreateInstance("@mozilla.org/timer;1");
if (!mPaintSuppressionTimer)
// Uh-oh. We must be out of memory. No point in keeping painting locked down.
mPaintingSuppressed = PR_FALSE;
else {
// Initialize the timer.
// Default to PAINTLOCK_EVENT_DELAY if we can't get the pref value.
PRInt32 delay =
nsContentUtils::GetIntPref("nglayout.initialpaint.delay",
PAINTLOCK_EVENT_DELAY);
nsCOMPtr<nsITimerInternal> ti = do_QueryInterface(mPaintSuppressionTimer);
ti->SetIdle(PR_FALSE);
mPaintSuppressionTimer->InitWithFuncCallback(sPaintSuppressionCallback,
this, delay,
nsITimer::TYPE_ONE_SHOT);
}
}
return NS_OK; //XXX this needs to be real. MMP
}
void
PresShell::sPaintSuppressionCallback(nsITimer *aTimer, void* aPresShell)
{
PresShell* self = NS_STATIC_CAST(PresShell*, aPresShell);
if (self)
self->UnsuppressPainting();
}
NS_IMETHODIMP
PresShell::ResizeReflow(nscoord aWidth, nscoord aHeight)
{
PRBool firstReflow = PR_FALSE;
NS_ASSERTION(mViewManager, "Must have view manager");
mViewManager->BeginUpdateViewBatch();
WillCauseReflow();
if (mCaret)
mCaret->EraseCaret();
// If we don't have a root frame yet, that means we haven't had our initial
// reflow... If that's the case, and aWidth or aHeight is unconstrained,
// ignore them altogether.
nsIFrame* rootFrame = FrameManager()->GetRootFrame();
if (!rootFrame &&
(aWidth == NS_UNCONSTRAINEDSIZE || aHeight == NS_UNCONSTRAINEDSIZE)) {
return NS_ERROR_NOT_AVAILABLE;
}
if (mPresContext) {
nsRect r(0, 0, aWidth, aHeight);
mPresContext->SetVisibleArea(r);
}
if (rootFrame) {
// Kick off a top-down reflow
NS_FRAME_LOG(NS_FRAME_TRACE_CALLS,
("enter nsPresShell::ResizeReflow: %d,%d", aWidth, aHeight));
#ifdef NS_DEBUG
if (nsIFrameDebug::GetVerifyTreeEnable()) {
nsIFrameDebug* frameDebug;
if (NS_SUCCEEDED(rootFrame->QueryInterface(NS_GET_IID(nsIFrameDebug),
(void**)&frameDebug))) {
frameDebug->VerifyTree();
}
}
#endif
#ifdef DEBUG_kipp
nsPresShell_ReflowStackPointerTop = (char*) &aWidth;
#endif
nsRect bounds = mPresContext->GetVisibleArea();
nsSize maxSize(bounds.width, bounds.height);
nsHTMLReflowMetrics desiredSize(nsnull);
nsReflowStatus status;
nsIRenderingContext* rcx = nsnull;
nsresult rv=CreateRenderingContext(rootFrame, &rcx);
if (NS_FAILED(rv)) return rv;
nsHTMLReflowState reflowState(mPresContext, rootFrame,
eReflowReason_Resize, rcx, maxSize);
rootFrame->WillReflow(mPresContext);
nsContainerFrame::PositionFrameView(rootFrame);
rootFrame->Reflow(mPresContext, desiredSize, reflowState, status);
rootFrame->SetSize(nsSize(desiredSize.width, desiredSize.height));
mPresContext->SetVisibleArea(nsRect(0,0,desiredSize.width,desiredSize.height));
nsContainerFrame::SyncFrameViewAfterReflow(mPresContext, rootFrame, rootFrame->GetView(),
nsnull);
rootFrame->DidReflow(mPresContext, nsnull, NS_FRAME_REFLOW_FINISHED);
#ifdef NS_DEBUG
if (nsIFrameDebug::GetVerifyTreeEnable()) {
nsIFrameDebug* frameDebug;
if (NS_SUCCEEDED(rootFrame->QueryInterface(NS_GET_IID(nsIFrameDebug),
(void**)&frameDebug))) {
frameDebug->VerifyTree();
}
}
#endif
VERIFY_STYLE_TREE;
NS_IF_RELEASE(rcx);
NS_FRAME_LOG(NS_FRAME_TRACE_CALLS, ("exit nsPresShell::ResizeReflow"));
// XXX if debugging then we should assert that the cache is empty
} else {
firstReflow = PR_TRUE;
#ifdef NOISY
printf("PresShell::ResizeReflow: null root frame\n");
#endif
}
DidCauseReflow();
// if the proper flag is set, VerifyReflow now
#ifdef NS_DEBUG
if (GetVerifyReflowEnable() && (VERIFY_REFLOW_DURING_RESIZE_REFLOW & gVerifyReflowFlags))
{
mInVerifyReflow = PR_TRUE;
/*PRBool ok = */VerifyIncrementalReflow();
mInVerifyReflow = PR_FALSE;
}
#endif
DidDoReflow();
mViewManager->EndUpdateViewBatch(NS_VMREFRESH_NO_SYNC);
if (!firstReflow) {
//Set resize event timer
CreateResizeEventTimer();
}
return NS_OK; //XXX this needs to be real. MMP
}
#define RESIZE_EVENT_DELAY 200
void
PresShell::CreateResizeEventTimer ()
{
KillResizeEventTimer();
if (mIsDocumentGone)
return;
mResizeEventTimer = do_CreateInstance("@mozilla.org/timer;1");
if (mResizeEventTimer) {
mResizeEventTimer->InitWithFuncCallback(sResizeEventCallback, this, RESIZE_EVENT_DELAY,
nsITimer::TYPE_ONE_SHOT);
}
}
void
PresShell::KillResizeEventTimer()
{
if(mResizeEventTimer) {
mResizeEventTimer->Cancel();
mResizeEventTimer = nsnull;
}
}
void
PresShell::sResizeEventCallback(nsITimer *aTimer, void* aPresShell)
{
PresShell* self = NS_STATIC_CAST(PresShell*, aPresShell);
if (self) {
self->FireResizeEvent();
}
}
void
PresShell::FireResizeEvent()
{
if (mIsDocumentGone)
return;
//Send resize event from here.
nsEvent event(PR_TRUE, NS_RESIZE_EVENT);
nsEventStatus status = nsEventStatus_eIgnore;
nsCOMPtr<nsIScriptGlobalObject> globalObj = mDocument->GetScriptGlobalObject();
if (globalObj) {
globalObj->HandleDOMEvent(mPresContext, &event, nsnull, NS_EVENT_FLAG_INIT, &status);
}
}
NS_IMETHODIMP
PresShell::SetIgnoreFrameDestruction(PRBool aIgnore)
{
mIgnoreFrameDestruction = aIgnore;
return NS_OK;
}
NS_IMETHODIMP
PresShell::NotifyDestroyingFrame(nsIFrame* aFrame)
{
if (!mIgnoreFrameDestruction) {
mFrameConstructor->NotifyDestroyingFrame(aFrame);
// Cancel any pending reflow commands targeted at this frame
CancelReflowCommandInternal(aFrame, nsnull);
DequeuePostedEventFor(aFrame);
// Notify the frame manager
FrameManager()->NotifyDestroyingFrame(aFrame);
// Remove frame properties
mPresContext->PropertyTable()->DeleteAllPropertiesFor(aFrame);
}
return NS_OK;
}
// note that this can return a null caret, but NS_OK
NS_IMETHODIMP PresShell::GetCaret(nsICaret **outCaret)
{
NS_ENSURE_ARG_POINTER(outCaret);
*outCaret = mCaret;
NS_IF_ADDREF(*outCaret);
return NS_OK;
}
NS_IMETHODIMP PresShell::SetCaretEnabled(PRBool aInEnable)
{
nsresult result = NS_OK;
PRBool oldEnabled = mCaretEnabled;
mCaretEnabled = aInEnable;
if (mCaret && (mCaretEnabled != oldEnabled))
{
/* Don't change the caret's selection here! This was an evil side-effect of SetCaretEnabled()
nsCOMPtr<nsIDOMSelection> domSel;
if (NS_SUCCEEDED(GetSelection(nsISelectionController::SELECTION_NORMAL, getter_AddRefs(domSel))) && domSel)
mCaret->SetCaretDOMSelection(domSel);
*/
result = mCaret->SetCaretVisible(mCaretEnabled);
}
return result;
}
NS_IMETHODIMP PresShell::SetCaretReadOnly(PRBool aReadOnly)
{
if (mCaret)
mCaret->SetCaretReadOnly(aReadOnly);
return NS_OK;
}
NS_IMETHODIMP PresShell::GetCaretEnabled(PRBool *aOutEnabled)
{
NS_ENSURE_ARG_POINTER(aOutEnabled);
*aOutEnabled = mCaretEnabled;
return NS_OK;
}
NS_IMETHODIMP PresShell::SetCaretVisibilityDuringSelection(PRBool aVisibility)
{
if (mCaret)
mCaret->SetVisibilityDuringSelection(aVisibility);
return NS_OK;
}
NS_IMETHODIMP PresShell::SetSelectionFlags(PRInt16 aInEnable)
{
mSelectionFlags = aInEnable;
return NS_OK;
}
NS_IMETHODIMP PresShell::GetSelectionFlags(PRInt16 *aOutEnable)
{
if (!aOutEnable)
return NS_ERROR_INVALID_ARG;
*aOutEnable = mSelectionFlags;
return NS_OK;
}
//implementation of nsISelectionController
NS_IMETHODIMP
PresShell::CharacterMove(PRBool aForward, PRBool aExtend)
{
return mSelection->CharacterMove(aForward, aExtend);
}
NS_IMETHODIMP
PresShell::WordMove(PRBool aForward, PRBool aExtend)
{
return mSelection->WordMove(aForward, aExtend);
}
NS_IMETHODIMP
PresShell::LineMove(PRBool aForward, PRBool aExtend)
{
nsresult result = mSelection->LineMove(aForward, aExtend);
// if we cant go down/up any more we must then move caret completely to
// end/beginning respectively.
if (NS_FAILED(result))
result = CompleteMove(aForward,aExtend);
return result;
}
NS_IMETHODIMP
PresShell::IntraLineMove(PRBool aForward, PRBool aExtend)
{
return mSelection->IntraLineMove(aForward, aExtend);
}
NS_IMETHODIMP
PresShell::PageMove(PRBool aForward, PRBool aExtend)
{
nsresult result;
nsIViewManager* viewManager = GetViewManager();
nsIScrollableView *scrollableView;
if (!viewManager)
return NS_ERROR_UNEXPECTED;
result = viewManager->GetRootScrollableView(&scrollableView);
if (NS_FAILED(result))
return result;
if (!scrollableView)
return NS_ERROR_UNEXPECTED;
nsIView *scrolledView;
result = scrollableView->GetScrolledView(scrolledView);
mSelection->CommonPageMove(aForward, aExtend, scrollableView, mSelection);
// do ScrollSelectionIntoView()
return ScrollSelectionIntoView(nsISelectionController::SELECTION_NORMAL, nsISelectionController::SELECTION_FOCUS_REGION, PR_TRUE);
}
NS_IMETHODIMP
PresShell::ScrollPage(PRBool aForward)
{
nsIScrollableView* scrollView = GetViewToScroll(nsLayoutUtils::eVertical);
if (scrollView) {
scrollView->ScrollByPages(0, aForward ? 1 : -1);
}
return NS_OK;
}
NS_IMETHODIMP
PresShell::ScrollLine(PRBool aForward)
{
nsIScrollableView* scrollView = GetViewToScroll(nsLayoutUtils::eVertical);
if (scrollView) {
#ifdef MOZ_WIDGET_COCOA
// Emulate the Mac IE behavior of scrolling a minimum of 2 lines
// rather than 1. This vastly improves scrolling speed.
scrollView->ScrollByLines(0, aForward ? 2 : -2);
#else
scrollView->ScrollByLines(0, aForward ? 1 : -1);
#endif
//NEW FOR LINES
// force the update to happen now, otherwise multiple scrolls can
// occur before the update is processed. (bug #7354)
// I'd use Composite here, but it doesn't always work.
// vm->Composite();
nsIViewManager* viewManager = GetViewManager();
if (viewManager) {
viewManager->ForceUpdate();
}
}
return NS_OK;
}
NS_IMETHODIMP
PresShell::ScrollHorizontal(PRBool aLeft)
{
nsIScrollableView* scrollView = GetViewToScroll(nsLayoutUtils::eHorizontal);
if (scrollView) {
scrollView->ScrollByLines(aLeft ? -1 : 1, 0);
//NEW FOR LINES
// force the update to happen now, otherwise multiple scrolls can
// occur before the update is processed. (bug #7354)
// I'd use Composite here, but it doesn't always work.
// vm->Composite();
nsIViewManager* viewManager = GetViewManager();
if (viewManager) {
viewManager->ForceUpdate();
}
}
return NS_OK;
}
NS_IMETHODIMP
PresShell::CompleteScroll(PRBool aForward)
{
nsIScrollableView* scrollView = GetViewToScroll(nsLayoutUtils::eVertical);
if (scrollView) {
scrollView->ScrollByWhole(!aForward);//TRUE = top, aForward TRUE=bottom
}
return NS_OK;
}
NS_IMETHODIMP
PresShell::CompleteMove(PRBool aForward, PRBool aExtend)
{
nsIScrollableView *scrollableView;
if (!mViewManager)
return NS_ERROR_UNEXPECTED;
nsresult result = mViewManager->GetRootScrollableView(&scrollableView);
if (NS_FAILED(result))
return result;
if (!scrollableView)
return NS_ERROR_UNEXPECTED;
nsIView *scrolledView;
result = scrollableView->GetScrolledView(scrolledView);
// get a frame
nsIFrame *frame = (nsIFrame*)scrolledView->GetClientData();
if (!frame)
return NS_ERROR_FAILURE;
//we need to get to the area frame.
nsIAtom* frameType;
do
{
frameType = frame->GetType();
if (frameType != nsLayoutAtoms::areaFrame)
{
frame = frame->GetFirstChild(nsnull);
if (!frame)
break;
}
}while(frameType != nsLayoutAtoms::areaFrame);
if (!frame)
return NS_ERROR_FAILURE; //could not find an area frame.
nsPeekOffsetStruct pos = frame->GetExtremeCaretPosition(!aForward);
// we 'prefer left' (i.e. prefer the beginning of the next line)
// iff we're moving to the end of the content
pos.mPreferLeft = aForward;
mSelection->HandleClick(pos.mResultContent ,pos.mContentOffset ,pos.mContentOffset/*End*/ ,aExtend, PR_FALSE, pos.mPreferLeft);
return ScrollSelectionIntoView(nsISelectionController::SELECTION_NORMAL, nsISelectionController::SELECTION_FOCUS_REGION, PR_TRUE);
}
NS_IMETHODIMP
PresShell::SelectAll()
{
return mSelection->SelectAll();
}
NS_IMETHODIMP
PresShell::CheckVisibility(nsIDOMNode *node, PRInt16 startOffset, PRInt16 EndOffset, PRBool *_retval)
{
if (!node || startOffset>EndOffset || !_retval || startOffset<0 || EndOffset<0)
return NS_ERROR_INVALID_ARG;
*_retval = PR_FALSE; //initialize return parameter
nsCOMPtr<nsIContent> content(do_QueryInterface(node));
if (!content)
return NS_ERROR_FAILURE;
nsIFrame *frame;
nsresult result = GetPrimaryFrameFor(content,&frame);
if (NS_FAILED(result)) //failure is taken as a no.
return result;
if (!frame) //no frame to look at so it must not be visible
return NS_OK;
//start process now to go through all frames to find startOffset. then check chars after that to see
//if anything until EndOffset is visible.
PRBool finished = PR_FALSE;
frame->CheckVisibility(mPresContext,startOffset,EndOffset,PR_TRUE,&finished, _retval);
return NS_OK;//dont worry about other return val
}
//end implementations nsISelectionController
static void UpdateViewProperties(nsPresContext* aPresContext, nsIViewManager* aVM,
nsIView* aView) {
nsIViewManager* thisVM = aView->GetViewManager();
if (thisVM != aVM) {
return;
}
nsIFrame* frame = NS_STATIC_CAST(nsIFrame*, aView->GetClientData());
if (frame) {
nsContainerFrame::SyncFrameViewProperties(aPresContext, frame, nsnull, aView);
}
for (nsIView* child = aView->GetFirstChild(); child;
child = child->GetNextSibling()) {
UpdateViewProperties(aPresContext, aVM, child);
}
}
NS_IMETHODIMP
PresShell::StyleChangeReflow()
{
WillCauseReflow();
nsIFrame* rootFrame = FrameManager()->GetRootFrame();
if (rootFrame) {
// Kick off a top-down reflow
NS_FRAME_LOG(NS_FRAME_TRACE_CALLS,
("enter nsPresShell::StyleChangeReflow"));
#ifdef NS_DEBUG
if (nsIFrameDebug::GetVerifyTreeEnable()) {
nsIFrameDebug* frameDebug;
if (NS_SUCCEEDED(rootFrame->QueryInterface(NS_GET_IID(nsIFrameDebug),
(void**)&frameDebug))) {
frameDebug->VerifyTree();
}
}
#endif
nsRect bounds = mPresContext->GetVisibleArea();
nsSize maxSize(bounds.width, bounds.height);
nsHTMLReflowMetrics desiredSize(nsnull);
nsReflowStatus status;
nsIRenderingContext* rcx = nsnull;
nsresult rv=CreateRenderingContext(rootFrame, &rcx);
if (NS_FAILED(rv)) return rv;
nsHTMLReflowState reflowState(mPresContext, rootFrame,
eReflowReason_StyleChange, rcx, maxSize);
rootFrame->WillReflow(mPresContext);
nsContainerFrame::PositionFrameView(rootFrame);
rootFrame->Reflow(mPresContext, desiredSize, reflowState, status);
rootFrame->SetSize(nsSize(desiredSize.width, desiredSize.height));
mPresContext->SetVisibleArea(nsRect(0,0,desiredSize.width,desiredSize.height));
nsIView* view = rootFrame->GetView();
nsContainerFrame::SyncFrameViewAfterReflow(mPresContext, rootFrame, view,
nsnull);
rootFrame->DidReflow(mPresContext, nsnull, NS_FRAME_REFLOW_FINISHED);
#ifdef NS_DEBUG
if (nsIFrameDebug::GetVerifyTreeEnable()) {
nsIFrameDebug* frameDebug;
if (NS_SUCCEEDED(rootFrame->QueryInterface(NS_GET_IID(nsIFrameDebug),
(void**)&frameDebug))) {
frameDebug->VerifyTree();
}
}
#endif
VERIFY_STYLE_TREE;
NS_IF_RELEASE(rcx);
NS_FRAME_LOG(NS_FRAME_TRACE_CALLS, ("exit nsPresShell::StyleChangeReflow"));
// The following two calls are needed to make sure we reacquire any needed
// style structs that were cleared by the caller
// Update properties of all views to reflect style changes
UpdateViewProperties(mPresContext, mViewManager, view);
// Repaint everything just to be sure
mViewManager->UpdateAllViews(NS_VMREFRESH_NO_SYNC);
}
DidCauseReflow();
DidDoReflow();
return NS_OK; //XXX this needs to be real. MMP
}
nsIFrame*
nsIPresShell::GetRootFrame() const
{
return FrameManager()->GetRootFrame();
}
NS_IMETHODIMP
PresShell::GetPageSequenceFrame(nsIPageSequenceFrame** aResult) const
{
NS_PRECONDITION(nsnull != aResult, "null ptr");
if (nsnull == aResult) {
return NS_ERROR_NULL_POINTER;
}
*aResult = nsnull;
nsIFrame* frame = mFrameConstructor->GetPageSequenceFrame();
if (frame) {
CallQueryInterface(frame, aResult);
}
return *aResult ? NS_OK : NS_ERROR_FAILURE;
}
void
PresShell::BeginUpdate(nsIDocument *aDocument, nsUpdateType aUpdateType)
{
#ifdef DEBUG
mUpdateCount++;
#endif
mFrameConstructor->BeginUpdate();
if (aUpdateType & UPDATE_STYLE)
mStyleSet->BeginUpdate();
}
void
PresShell::EndUpdate(nsIDocument *aDocument, nsUpdateType aUpdateType)
{
#ifdef DEBUG
NS_PRECONDITION(0 != mUpdateCount, "too many EndUpdate's");
--mUpdateCount;
#endif
if (aUpdateType & UPDATE_STYLE) {
mStyleSet->EndUpdate();
if (mStylesHaveChanged)
ReconstructStyleData();
}
mFrameConstructor->EndUpdate();
}
void
PresShell::BeginLoad(nsIDocument *aDocument)
{
#ifdef MOZ_PERF_METRICS
// Reset style resolution stopwatch maintained by style set
MOZ_TIMER_DEBUGLOG(("Reset: Style Resolution: PresShell::BeginLoad(), this=%p\n", (void*)this));
#endif
mDocumentLoading = PR_TRUE;
}
void
PresShell::EndLoad(nsIDocument *aDocument)
{
// Restore frame state for the root scroll frame
nsIFrame* rootFrame = FrameManager()->GetRootFrame();
nsCOMPtr<nsILayoutHistoryState> historyState =
aDocument->GetLayoutHistoryState();
// Make sure we don't reenter reflow via the sync paint that happens while
// we're scrolling to our restored position. Entering reflow for the
// scrollable frame will cause it to reenter ScrollToRestoredPosition(), and
// it'll get all confused.
++mChangeNestCount;
if (rootFrame && historyState) {
nsIFrame* scrollFrame = GetRootScrollFrame(rootFrame);
if (scrollFrame) {
nsIScrollableFrame* scrollableFrame;
CallQueryInterface(scrollFrame, &scrollableFrame);
if (scrollableFrame) {
FrameManager()->RestoreFrameStateFor(scrollFrame, historyState,
nsIStatefulFrame::eDocumentScrollState);
scrollableFrame->ScrollToRestoredPosition();
}
}
}
--mChangeNestCount;
#ifdef MOZ_PERF_METRICS
// Dump reflow, style resolution and frame construction times here.
MOZ_TIMER_DEBUGLOG(("Stop: Reflow: PresShell::EndLoad(), this=%p\n", this));
MOZ_TIMER_STOP(mReflowWatch);
MOZ_TIMER_LOG(("Reflow time (this=%p): ", this));
MOZ_TIMER_PRINT(mReflowWatch);
MOZ_TIMER_DEBUGLOG(("Stop: Frame Creation: PresShell::EndLoad(), this=%p\n", this));
MOZ_TIMER_STOP(mFrameCreationWatch);
MOZ_TIMER_LOG(("Frame construction plus style resolution time (this=%p): ", this));
MOZ_TIMER_PRINT(mFrameCreationWatch);
// Print style resolution stopwatch maintained by style set
MOZ_TIMER_DEBUGLOG(("Stop: Style Resolution: PresShell::EndLoad(), this=%p\n", this));
#endif
mDocumentLoading = PR_FALSE;
}
// aReflowCommand is considered to be already in the queue if the
// frame it targets is targeted by a pre-existing reflow command in
// the queue.
PRBool
PresShell::AlreadyInQueue(nsHTMLReflowCommand* aReflowCommand)
{
if (!mReflowCommandTable.ops) {
// We're already destroyed
NS_ERROR("We really shouldn't be posting reflow commands here");
}
ReflowCommandEntry* e =
NS_STATIC_CAST(ReflowCommandEntry*,
PL_DHashTableOperate(&mReflowCommandTable, aReflowCommand,
PL_DHASH_ADD));
if (!e) {
// We lie no matter what we say here
return PR_FALSE;
}
// We're using the stub ClearEntry, which zeros out entries, so a
// non-null mCommand means we're in the queue already.
if (e->mCommand) {
#ifdef DEBUG
if (VERIFY_REFLOW_NOISY_RC & gVerifyReflowFlags) {
printf("*** PresShell::AlreadyInQueue(): Discarding reflow command: this=%p\n", (void*)this);
aReflowCommand->List(stdout);
}
#endif
return PR_TRUE;
}
e->mCommand = aReflowCommand;
return PR_FALSE;
}
NS_IMETHODIMP
PresShell::AppendReflowCommand(nsIFrame* aTargetFrame,
nsReflowType aReflowType,
nsIAtom* aChildListName)
{
// If we've not yet done the initial reflow, then don't bother
// enqueuing a reflow command yet.
if (! mDidInitialReflow)
return NS_OK;
// If we're already destroying, don't bother with this either.
if (mIsDestroying)
return NS_OK;
#ifdef DEBUG
//printf("gShellCounter: %d\n", gShellCounter++);
if (mInVerifyReflow) {
return NS_OK;
}
#endif
nsHTMLReflowCommand* command = new nsHTMLReflowCommand(aTargetFrame,
aReflowType,
aChildListName);
if (!command) {
return NS_ERROR_OUT_OF_MEMORY;
}
#ifdef DEBUG
if (VERIFY_REFLOW_NOISY_RC & gVerifyReflowFlags) {
printf("\nPresShell@%p: adding reflow command\n", (void*)this);
command->List(stdout);
if (VERIFY_REFLOW_REALLY_NOISY_RC & gVerifyReflowFlags) {
printf("Current content model:\n");
nsIContent *rootContent = mDocument->GetRootContent();
if (rootContent) {
rootContent->List(stdout, 0);
}
}
}
#endif
// Add the reflow command to the queue
nsresult rv = NS_OK;
if (!AlreadyInQueue(command)) {
if (mReflowCommands.AppendElement(command)) {
ReflowCommandAdded(command);
} else {
// Drop this command.... we're out of memory
PL_DHashTableOperate(&mReflowCommandTable, command,
PL_DHASH_REMOVE);
delete command;
rv = NS_ERROR_OUT_OF_MEMORY;
}
}
else {
// We're not going to process this reflow command.
delete command;
}
// For async reflow during doc load, post a reflow event if we are not batching reflow commands.
// For sync reflow during doc load, post a reflow event if we are not batching reflow commands
// and the document is not loading.
if ((gAsyncReflowDuringDocLoad && !mBatchReflows) ||
(!gAsyncReflowDuringDocLoad && !mBatchReflows && !mDocumentLoading)) {
// If we're in the middle of a drag, process it right away (needed for mac,
// might as well do it on all platforms just to keep the code paths the same).
if ( !IsDragInProgress() )
PostReflowEvent();
}
return rv;
}
//
// IsDragInProgress
//
// Ask the drag service if we're in the middle of a drag
//
PRBool
PresShell :: IsDragInProgress ( ) const
{
PRBool dragInProgress = PR_FALSE;
if ( mDragService ) {
nsCOMPtr<nsIDragSession> session;
mDragService->GetCurrentSession ( getter_AddRefs(session) );
if ( session )
dragInProgress = PR_TRUE;
}
return dragInProgress;
} // IsDragInProgress
nsIScrollableView*
PresShell::GetViewToScroll(nsLayoutUtils::Direction aDirection)
{
nsCOMPtr<nsIEventStateManager> esm = mPresContext->EventStateManager();
nsIScrollableView* scrollView = nsnull;
nsCOMPtr<nsIContent> focusedContent;
esm->GetFocusedContent(getter_AddRefs(focusedContent));
if (!focusedContent && mSelection) {
nsCOMPtr<nsISelection> domSelection;
mSelection->GetSelection(nsISelectionController::SELECTION_NORMAL,
getter_AddRefs(domSelection));
if (domSelection) {
nsCOMPtr<nsIDOMNode> focusedNode;
domSelection->GetFocusNode(getter_AddRefs(focusedNode));
focusedContent = do_QueryInterface(focusedNode);
}
}
if (focusedContent) {
nsIFrame* startFrame = nsnull;
GetPrimaryFrameFor(focusedContent, &startFrame);
if (startFrame) {
nsCOMPtr<nsIScrollableViewProvider> svp = do_QueryInterface(startFrame);
// If this very frame provides a scroll view, start there instead of frame's
// closest view, because the scroll view may be inside a child frame.
// For example, this happens in the case of overflow:scroll.
// In that case we still use GetNearestScrollingView() because
// we need a scrolling view that matches aDirection.
nsIScrollableView* sv;
nsIView* startView = svp && (sv = svp->GetScrollableView()) ? sv->View() : startFrame->GetClosestView();
NS_ASSERTION(startView, "No view to start searching for scrollable view from");
scrollView = nsLayoutUtils::GetNearestScrollingView(startView, aDirection);
}
}
if (!scrollView) {
nsIViewManager* viewManager = GetViewManager();
if (viewManager) {
viewManager->GetRootScrollableView(&scrollView);
}
}
return scrollView;
}
NS_IMETHODIMP
PresShell::CancelReflowCommandInternal(nsIFrame* aTargetFrame,
nsReflowType* aCmdType,
PRBool aProcessDummyLayoutRequest)
{
PRInt32 i, n = mReflowCommands.Count();
for (i = 0; i < n; i++) {
nsHTMLReflowCommand* rc = (nsHTMLReflowCommand*) mReflowCommands.ElementAt(i);
if (rc && rc->GetTarget() == aTargetFrame &&
(!aCmdType || rc->Type() == *aCmdType)) {
#ifdef DEBUG
if (VERIFY_REFLOW_NOISY_RC & gVerifyReflowFlags) {
printf("PresShell: removing rc=%p for frame ", (void*)rc);
nsFrame::ListTag(stdout, aTargetFrame);
printf("\n");
}
#endif
mReflowCommands.RemoveElementAt(i);
ReflowCommandRemoved(rc);
delete rc;
n--;
i--;
}
}
if (aProcessDummyLayoutRequest) {
DoneRemovingReflowCommands();
}
return NS_OK;
}
NS_IMETHODIMP
PresShell::CancelReflowCommand(nsIFrame* aTargetFrame,
nsReflowType* aCmdType)
{
return CancelReflowCommandInternal(aTargetFrame, aCmdType);
}
NS_IMETHODIMP
PresShell::CancelAllReflowCommands()
{
PRInt32 n = mReflowCommands.Count();
nsHTMLReflowCommand* rc;
PRInt32 i;
for (i = 0; i < n; i++) {
rc = NS_STATIC_CAST(nsHTMLReflowCommand*, mReflowCommands.ElementAt(i));
ReflowCommandRemoved(rc);
delete rc;
}
NS_ASSERTION(n == mReflowCommands.Count(),"reflow command list changed during cancel!");
mReflowCommands.Clear();
DoneRemovingReflowCommands();
return NS_OK;
}
#ifdef ACCESSIBILITY
void nsIPresShell::InvalidateAccessibleSubtree(nsIContent *aContent)
{
if (mIsAccessibilityActive) {
nsCOMPtr<nsIAccessibilityService> accService =
do_GetService("@mozilla.org/accessibilityService;1");
if (accService) {
accService->InvalidateSubtreeFor(this, aContent,
nsIAccessibleEvent::EVENT_REORDER);
}
}
}
#endif
NS_IMETHODIMP
PresShell::RecreateFramesFor(nsIContent* aContent)
{
NS_ENSURE_TRUE(mPresContext, NS_ERROR_FAILURE);
// Don't call RecreateFramesForContent since that is not exported and we want
// to keep the number of entrypoints down.
nsStyleChangeList changeList;
changeList.AppendChange(nsnull, aContent, nsChangeHint_ReconstructFrame);
NS_ASSERTION(mViewManager, "Should have view manager");
mViewManager->BeginUpdateViewBatch();
nsresult rv = mFrameConstructor->ProcessRestyledFrames(changeList);
mViewManager->EndUpdateViewBatch(NS_VMREFRESH_NO_SYNC);
#ifdef ACCESSIBILITY
InvalidateAccessibleSubtree(aContent);
#endif
return rv;
}
NS_IMETHODIMP
PresShell::ClearFrameRefs(nsIFrame* aFrame)
{
mPresContext->EventStateManager()->ClearFrameRefs(aFrame);
if (aFrame == mCurrentEventFrame) {
mCurrentEventContent = aFrame->GetContent();
mCurrentEventFrame = nsnull;
}
for (int i=0; i<mCurrentEventFrameStack.Count(); i++) {
if (aFrame == (nsIFrame*)mCurrentEventFrameStack.ElementAt(i)) {
//One of our stack frames was deleted. Get its content so that when we
//pop it we can still get its new frame from its content
nsIContent *currentEventContent = aFrame->GetContent();
mCurrentEventContentStack.ReplaceObjectAt(currentEventContent, i);
mCurrentEventFrameStack.ReplaceElementAt(nsnull, i);
}
}
nsWeakFrame* weakFrame = mWeakFrames;
while (weakFrame) {
nsWeakFrame* prev = weakFrame->GetPreviousWeakFrame();
if (weakFrame->GetFrame() == aFrame) {
// This removes weakFrame from mWeakFrames.
weakFrame->Clear(this);
}
weakFrame = prev;
}
return NS_OK;
}
NS_IMETHODIMP
PresShell::CreateRenderingContext(nsIFrame *aFrame,
nsIRenderingContext** aResult)
{
NS_PRECONDITION(nsnull != aResult, "null ptr");
if (nsnull == aResult) {
return NS_ERROR_NULL_POINTER;
}
nsresult rv;
nsIView *view = aFrame->GetClosestView();
nsIWidget* widget = view ? view->GetNearestWidget(nsnull) : nsnull;
nsIRenderingContext* result = nsnull;
nsIDeviceContext *deviceContext = mPresContext->DeviceContext();
if (widget) {
rv = deviceContext->CreateRenderingContext(widget, result);
}
else {
rv = deviceContext->CreateRenderingContext(result);
}
*aResult = result;
return rv;
}
// A CantRenderReplacedElementEvent has a weak pointer to the presshell and the
// presshell has a weak pointer to the event. The event queue owns the event
// and the presshell will delete the event if it's going to go away.
struct CantRenderReplacedElementEvent : public PLEvent {
CantRenderReplacedElementEvent(PresShell* aPresShell,
nsIFrame* aFrame) NS_HIDDEN;
~CantRenderReplacedElementEvent() {
RemoveLoadGroupRequest();
}
// XXXldb Should the pres shell maintain a reference count on a single
// dummy layout request instead of doing creation of a separate one
// here (and per-event!)?
// XXXbz absolutely! Should be a per-document counter, actually....
NS_HIDDEN_(void) AddLoadGroupRequest();
NS_HIDDEN_(void) RemoveLoadGroupRequest();
NS_HIDDEN_(PresShell*) OurPresShell() {
return NS_STATIC_CAST(PresShell*, owner);
}
void HandleEvent();
nsIFrame* mFrame; // the frame that can't be rendered
CantRenderReplacedElementEvent* mNext; // next event in the list
nsCOMPtr<nsIRequest> mDummyLayoutRequest; // load group request
};
PR_STATIC_CALLBACK(void*)
HandleCantRenderReplacedElementEvent(PLEvent* aEvent)
{
CantRenderReplacedElementEvent* evt =
NS_STATIC_CAST(CantRenderReplacedElementEvent*, aEvent);
evt->HandleEvent();
return nsnull;
}
PR_STATIC_CALLBACK(void)
DestroyCantRenderReplacedElementEvent(PLEvent* aEvent)
{
CantRenderReplacedElementEvent* evt =
NS_STATIC_CAST(CantRenderReplacedElementEvent*, aEvent);
delete evt;
}
CantRenderReplacedElementEvent::CantRenderReplacedElementEvent(PresShell* aPresShell,
nsIFrame* aFrame) :
mFrame(aFrame)
{
PL_InitEvent(this, aPresShell,
::HandleCantRenderReplacedElementEvent,
::DestroyCantRenderReplacedElementEvent);
// XXXbz why only for object frames?
if (nsLayoutAtoms::objectFrame == aFrame->GetType()) {
AddLoadGroupRequest();
}
}
void
PresShell::DequeuePostedEventFor(nsIFrame* aFrame)
{
// If there's a posted event for this frame, then remove it
CantRenderReplacedElementEvent** event = FindPostedEventFor(aFrame);
if (!*event) {
return;
}
CantRenderReplacedElementEvent* tmp = *event;
// Remove it from our linked list of posted events
*event = (*event)->mNext;
// Dequeue it from the event queue
nsCOMPtr<nsIEventQueue> eventQueue;
mEventQueueService->
GetSpecialEventQueue(nsIEventQueueService::UI_THREAD_EVENT_QUEUE,
getter_AddRefs(eventQueue));
NS_ASSERTION(eventQueue,
"will crash soon due to event holding dangling pointer to "
"frame");
if (eventQueue) {
PLEventQueue* plqueue;
eventQueue->GetPLEventQueue(&plqueue);
NS_ASSERTION(plqueue,
"will crash soon due to event holding dangling pointer to "
"frame");
if (plqueue) {
// Remove the event and then destroy it
PL_DequeueEvent(tmp, plqueue);
PL_DestroyEvent(tmp);
}
}
}
// Add a load group request in order to delay the onLoad handler when we have
// pending replacements
void
CantRenderReplacedElementEvent::AddLoadGroupRequest()
{
PresShell* presShell = OurPresShell();
nsIDocument *doc = presShell->GetDocument();
if (!doc) {
return;
}
nsDummyLayoutRequest::Create(getter_AddRefs(mDummyLayoutRequest), presShell);
if (!mDummyLayoutRequest) {
return;
}
nsCOMPtr<nsILoadGroup> loadGroup = doc->GetDocumentLoadGroup();
if (!loadGroup) {
return;
}
nsresult rv = mDummyLayoutRequest->SetLoadGroup(loadGroup);
if (NS_FAILED(rv)) {
return;
}
loadGroup->AddRequest(mDummyLayoutRequest, nsnull);
}
// Remove the load group request added above
void
CantRenderReplacedElementEvent::RemoveLoadGroupRequest()
{
if (mDummyLayoutRequest) {
nsCOMPtr<nsIRequest> request = mDummyLayoutRequest;
mDummyLayoutRequest = nsnull;
nsIDocument *doc = OurPresShell()->GetDocument();
if (!doc) {
return;
}
nsCOMPtr<nsILoadGroup> loadGroup = doc->GetDocumentLoadGroup();
if (!loadGroup) {
return;
}
loadGroup->RemoveRequest(request, nsnull, NS_OK);
}
}
void
CantRenderReplacedElementEvent::HandleEvent()
{
// Remove ourselves from the linked list
PresShell* presShell = OurPresShell();
CantRenderReplacedElementEvent** events = &presShell->mPostedReplaces;
while (*events) {
if (*events == this) {
*events = (*events)->mNext;
break;
}
events = &(*events)->mNext;
NS_ASSERTION(*events, "event not in queue");
}
// Make sure to prevent reflow while we're messing with frames
++presShell->mChangeNestCount;
presShell->FrameConstructor()->CantRenderReplacedElement(mFrame);
--presShell->mChangeNestCount;
}
CantRenderReplacedElementEvent**
PresShell::FindPostedEventFor(nsIFrame* aFrame)
{
CantRenderReplacedElementEvent** event = &mPostedReplaces;
while (*event) {
if ((*event)->mFrame == aFrame) {
return event;
}
event = &(*event)->mNext;
}
return event;
}
NS_IMETHODIMP
PresShell::CantRenderReplacedElement(nsIFrame* aFrame)
{
if (*FindPostedEventFor(aFrame))
return NS_OK;
// Handle this asynchronously
nsCOMPtr<nsIEventQueue> eventQueue;
nsresult rv = mEventQueueService->
GetSpecialEventQueue(nsIEventQueueService::UI_THREAD_EVENT_QUEUE,
getter_AddRefs(eventQueue));
NS_ENSURE_SUCCESS(rv, rv);
// Verify that there isn't already a posted event associated with
// this frame.
CantRenderReplacedElementEvent* ev;
// Create a new event
ev = new CantRenderReplacedElementEvent(this, aFrame);
if (!ev) {
return NS_ERROR_OUT_OF_MEMORY;
}
// Post the event
rv = eventQueue->PostEvent(ev);
if (NS_FAILED(rv)) {
PL_DestroyEvent(ev);
}
else {
// Add the event to our linked list of posted events
ev->mNext = mPostedReplaces;
mPostedReplaces = ev;
}
return rv;
}
NS_IMETHODIMP
PresShell::GoToAnchor(const nsAString& aAnchorName, PRBool aScroll)
{
if (!mDocument) {
return NS_ERROR_FAILURE;
}
// Hold a reference to the ESM in case event dispatch tears us down.
nsCOMPtr<nsIEventStateManager> esm = mPresContext->EventStateManager();
if (aAnchorName.IsEmpty()) {
NS_ASSERTION(!aScroll, "can't scroll to empty anchor name");
esm->SetContentState(nsnull, NS_EVENT_STATE_URLTARGET);
return NS_OK;
}
nsCOMPtr<nsIDOMDocument> doc = do_QueryInterface(mDocument);
nsCOMPtr<nsIDOMHTMLDocument> htmlDoc = do_QueryInterface(mDocument);
nsresult rv = NS_OK;
nsCOMPtr<nsIContent> content;
// Search for an element with a matching "id" attribute
if (doc) {
nsCOMPtr<nsIDOMElement> element;
rv = doc->GetElementById(aAnchorName, getter_AddRefs(element));
if (NS_SUCCEEDED(rv) && element) {
// Get the nsIContent interface, because that's what we need to
// get the primary frame
content = do_QueryInterface(element);
}
}
// Search for an anchor element with a matching "name" attribute
if (!content && htmlDoc) {
nsCOMPtr<nsIDOMNodeList> list;
// Find a matching list of named nodes
rv = htmlDoc->GetElementsByName(aAnchorName, getter_AddRefs(list));
if (NS_SUCCEEDED(rv) && list) {
PRUint32 i;
// Loop through the named nodes looking for the first anchor
for (i = 0; PR_TRUE; i++) {
nsCOMPtr<nsIDOMNode> node;
rv = list->Item(i, getter_AddRefs(node));
if (!node) { // End of list
break;
}
// Ensure it's an anchor element
content = do_QueryInterface(node);
if (content) {
if (content->Tag() == nsHTMLAtoms::a &&
content->IsContentOfType(nsIContent::eHTML)) {
break;
}
content = nsnull;
}
}
}
}
// Search for anchor in the HTML namespace with a matching name
if (!content && !htmlDoc)
{
nsCOMPtr<nsIDOMNodeList> list;
NS_NAMED_LITERAL_STRING(nameSpace, "http://www.w3.org/1999/xhtml");
// Get the list of anchor elements
rv = doc->GetElementsByTagNameNS(nameSpace, NS_LITERAL_STRING("a"), getter_AddRefs(list));
if (NS_SUCCEEDED(rv) && list) {
PRUint32 i;
// Loop through the named nodes looking for the first anchor
for (i = 0; PR_TRUE; i++) {
nsCOMPtr<nsIDOMNode> node;
rv = list->Item(i, getter_AddRefs(node));
if (!node) { // End of list
break;
}
// Compare the name attribute
nsCOMPtr<nsIDOMElement> element = do_QueryInterface(node);
nsAutoString value;
if (element && NS_SUCCEEDED(element->GetAttribute(NS_LITERAL_STRING("name"), value))) {
if (value.Equals(aAnchorName)) {
content = do_QueryInterface(element);
break;
}
}
}
}
}
nsCOMPtr<nsIDOMRange> jumpToRange;
nsCOMPtr<nsIXPointerResult> xpointerResult;
if (!content) {
nsCOMPtr<nsIDOMXMLDocument> xmldoc = do_QueryInterface(mDocument);
if (xmldoc) {
// Try XPointer
xmldoc->EvaluateXPointer(aAnchorName, getter_AddRefs(xpointerResult));
if (xpointerResult) {
xpointerResult->Item(0, getter_AddRefs(jumpToRange));
if (!jumpToRange) {
// We know it was an XPointer, so there is no point in
// trying any other pointer types, let's just return
// an error.
return NS_ERROR_FAILURE;
}
}
// Finally try FIXptr
if (!jumpToRange) {
xmldoc->EvaluateFIXptr(aAnchorName,getter_AddRefs(jumpToRange));
}
if (jumpToRange) {
nsCOMPtr<nsIDOMNode> node;
jumpToRange->GetStartContainer(getter_AddRefs(node));
if (node) {
PRUint16 nodeType;
node->GetNodeType(&nodeType);
PRInt32 offset = -1;
jumpToRange->GetStartOffset(&offset);
switch (nodeType) {
case nsIDOMNode::ATTRIBUTE_NODE:
{
// XXX Assuming jumping to the ownerElement is the sanest action.
nsCOMPtr<nsIAttribute> attr = do_QueryInterface(node);
content = attr->GetContent();
break;
}
case nsIDOMNode::DOCUMENT_NODE:
{
if (offset >= 0) {
nsCOMPtr<nsIDocument> document = do_QueryInterface(node);
content = document->GetChildAt(offset);
}
break;
}
case nsIDOMNode::DOCUMENT_FRAGMENT_NODE:
case nsIDOMNode::ELEMENT_NODE:
case nsIDOMNode::ENTITY_REFERENCE_NODE:
{
if (offset >= 0) {
nsCOMPtr<nsIContent> parent = do_QueryInterface(node);
content = parent->GetChildAt(offset);
}
break;
}
case nsIDOMNode::CDATA_SECTION_NODE:
case nsIDOMNode::COMMENT_NODE:
case nsIDOMNode::TEXT_NODE:
case nsIDOMNode::PROCESSING_INSTRUCTION_NODE:
{
// XXX This should scroll to a specific position in the text.
content = do_QueryInterface(node);
break;
}
}
}
}
}
}
esm->SetContentState(content, NS_EVENT_STATE_URLTARGET);
if (content) {
// Flush notifications so we scroll to the right place
if (aScroll) {
mDocument->FlushPendingNotifications(Flush_Layout);
// Get the primary frame
nsIFrame* frame = nsnull;
GetPrimaryFrameFor(content, &frame);
NS_ENSURE_TRUE(frame, NS_ERROR_FAILURE);
rv = ScrollFrameIntoView(frame, NS_PRESSHELL_SCROLL_TOP,
NS_PRESSHELL_SCROLL_ANYWHERE);
NS_ENSURE_SUCCESS(rv, rv);
}
// Should we select the target? This action is controlled by a
// preference: the default is to not select.
PRBool selectAnchor = nsContentUtils::GetBoolPref("layout.selectanchor");
// Even if select anchor pref is false, we must still move the
// caret there. That way tabbing will start from the new
// location
if (!jumpToRange) {
jumpToRange = do_CreateInstance(kRangeCID);
if (jumpToRange) {
while (content && content->GetChildCount() > 0) {
content = content->GetChildAt(0);
}
nsCOMPtr<nsIDOMNode> node(do_QueryInterface(content));
NS_ASSERTION(node, "No nsIDOMNode for descendent of anchor");
jumpToRange->SelectNodeContents(node);
}
}
if (jumpToRange) {
// Select the anchor
nsCOMPtr<nsISelection> sel;
if (NS_SUCCEEDED(
GetSelection(nsISelectionController::SELECTION_NORMAL,
getter_AddRefs(sel))) &&
sel) {
sel->RemoveAllRanges();
sel->AddRange(jumpToRange);
if (!selectAnchor) {
// Use a caret (collapsed selection) at the start of the anchor
sel->CollapseToStart();
}
}
if (selectAnchor && xpointerResult) {
// Select the rest (if any) of the ranges in XPointerResult
PRUint32 count, i;
xpointerResult->GetLength(&count);
for (i = 1; i < count; i++) { // jumpToRange is i = 0
nsCOMPtr<nsIDOMRange> range;
xpointerResult->Item(i, getter_AddRefs(range));
sel->AddRange(range);
}
}
// Selection is at anchor.
// Now focus the document itself if focus is on an element within it.
nsPIDOMWindow *win = mDocument->GetWindow();
if (win) {
nsCOMPtr<nsIFocusController> focusController = win->GetRootFocusController();
if (focusController) {
nsCOMPtr<nsIDOMWindowInternal> focusedWin;
focusController->GetFocusedWindow(getter_AddRefs(focusedWin));
if (SameCOMIdentity(win, focusedWin)) {
esm->ChangeFocusWith(nsnull, nsIEventStateManager::eEventFocusedByApplication);
}
}
}
}
} else {
rv = NS_ERROR_FAILURE; //changed to NS_OK in quirks mode if ScrollTo is called
// Scroll to the top/left if the anchor can not be
// found and it is labelled top (quirks mode only). @see bug 80784
if ((NS_LossyConvertUCS2toASCII(aAnchorName).LowerCaseEqualsLiteral("top")) &&
(mPresContext->CompatibilityMode() == eCompatibility_NavQuirks)) {
rv = NS_OK;
// Check |aScroll| after setting |rv| so we set |rv| to the same
// thing whether or not |aScroll| is true.
if (aScroll && mViewManager) {
// Get the viewport scroller
nsIScrollableView* scrollingView;
mViewManager->GetRootScrollableView(&scrollingView);
if (scrollingView) {
// Scroll to the top of the page
scrollingView->ScrollTo(0, 0, NS_VMREFRESH_IMMEDIATE);
}
}
}
}
return rv;
}
/**
* This function takes a scrolling view, a rect, and a scroll position and
* attempts to scroll that rect to that position in that view. The rect
* should be in the coordinate system of the _scrolled_ view.
*/
static void ScrollViewToShowRect(nsIScrollableView* aScrollingView,
nsRect & aRect,
PRIntn aVPercent,
PRIntn aHPercent)
{
// Determine the visible rect in the scrolling view's coordinate space.
// The size of the visible area is the clip view size
nsRect visibleRect = aScrollingView->View()->GetBounds(); // get width and height
aScrollingView->GetScrollPosition(visibleRect.x, visibleRect.y);
// The actual scroll offsets
nscoord scrollOffsetX = visibleRect.x;
nscoord scrollOffsetY = visibleRect.y;
nscoord lineHeight;
aScrollingView->GetLineHeight(&lineHeight);
// See how the rect should be positioned vertically
if (NS_PRESSHELL_SCROLL_ANYWHERE == aVPercent) {
// The caller doesn't care where the frame is positioned vertically,
// so long as it's fully visible
if (aRect.y < visibleRect.y) {
// Scroll up so the frame's top edge is visible
scrollOffsetY = aRect.y;
} else if (aRect.YMost() > visibleRect.YMost()) {
// Scroll down so the frame's bottom edge is visible. Make sure the
// frame's top edge is still visible
scrollOffsetY += aRect.YMost() - visibleRect.YMost();
if (scrollOffsetY > aRect.y) {
scrollOffsetY = aRect.y;
}
}
} else if (NS_PRESSHELL_SCROLL_IF_NOT_VISIBLE == aVPercent) {
// Scroll only if no part of the frame is visible in this view
if (aRect.YMost() - lineHeight < visibleRect.y) {
// Scroll up so the frame's top edge is visible
scrollOffsetY = aRect.y;
} else if (aRect.y + lineHeight > visibleRect.YMost()) {
// Scroll down so the frame's bottom edge is visible. Make sure the
// frame's top edge is still visible
scrollOffsetY += aRect.YMost() - visibleRect.YMost();
if (scrollOffsetY > aRect.y) {
scrollOffsetY = aRect.y;
}
}
} else {
// Align the frame edge according to the specified percentage
nscoord frameAlignY =
NSToCoordRound(aRect.y + aRect.height * (aVPercent / 100.0f));
scrollOffsetY =
NSToCoordRound(frameAlignY - visibleRect.height * (aVPercent / 100.0f));
}
// See how the frame should be positioned horizontally
if (NS_PRESSHELL_SCROLL_ANYWHERE == aHPercent) {
// The caller doesn't care where the frame is positioned horizontally,
// so long as it's fully visible
if (aRect.x < visibleRect.x) {
// Scroll left so the frame's left edge is visible
scrollOffsetX = aRect.x;
} else if (aRect.XMost() > visibleRect.XMost()) {
// Scroll right so the frame's right edge is visible. Make sure the
// frame's left edge is still visible
scrollOffsetX += aRect.XMost() - visibleRect.XMost();
if (scrollOffsetX > aRect.x) {
scrollOffsetX = aRect.x;
}
}
} else if (NS_PRESSHELL_SCROLL_IF_NOT_VISIBLE == aHPercent) {
// Scroll only if no part of the frame is visible in this view
// XXXbz using the line height here is odd, but there are no
// natural dimensions to use here, really....
if (aRect.XMost() - lineHeight < visibleRect.x) {
// Scroll left so the frame's left edge is visible
scrollOffsetX = aRect.x;
} else if (aRect.x + lineHeight > visibleRect.XMost()) {
// Scroll right so the frame's right edge is visible. Make sure the
// frame's left edge is still visible
scrollOffsetX += aRect.XMost() - visibleRect.XMost();
if (scrollOffsetX > aRect.x) {
scrollOffsetX = aRect.x;
}
}
} else {
// Align the frame edge according to the specified percentage
nscoord frameAlignX =
NSToCoordRound(aRect.x + (aRect.width) * (aHPercent / 100.0f));
scrollOffsetX =
NSToCoordRound(frameAlignX - visibleRect.width * (aHPercent / 100.0f));
}
aScrollingView->ScrollTo(scrollOffsetX, scrollOffsetY,
NS_VMREFRESH_IMMEDIATE);
}
NS_IMETHODIMP
PresShell::ScrollFrameIntoView(nsIFrame *aFrame,
PRIntn aVPercent,
PRIntn aHPercent) const
{
if (!aFrame) {
return NS_ERROR_NULL_POINTER;
}
// Before we scroll the frame into view, ask the command dispatcher
// if we're resetting focus because a window just got an activate
// event. If we are, we do not want to scroll the frame into view.
// Example: The user clicks on an anchor, and then deactivates the
// window. When they reactivate the window, the expected behavior
// is not for the anchor link to scroll back into view. That is what
// this check is preventing.
// XXX: The dependency on the command dispatcher needs to be fixed.
nsIContent* content = aFrame->GetContent();
if (content) {
nsIDocument* document = content->GetDocument();
if (document){
nsCOMPtr<nsPIDOMWindow> ourWindow = do_QueryInterface(document->GetScriptGlobalObject());
if(ourWindow) {
nsIFocusController *focusController =
ourWindow->GetRootFocusController();
if (focusController) {
PRBool dontScroll;
focusController->GetSuppressFocusScroll(&dontScroll);
if(dontScroll)
return NS_OK;
}
}
}
}
// Flush out pending reflows to make sure we scroll to the right place
mDocument->FlushPendingNotifications(Flush_OnlyReflow);
// This is a two-step process.
// Step 1: Find the bounds of the rect we want to scroll into view. For
// example, for an inline frame we may want to scroll in the whole
// line.
// Step 2: Walk the views that are parents of the frame and scroll them
// appropriately.
nsRect frameBounds = aFrame->GetRect();
nsPoint offset;
nsIView* closestView;
aFrame->GetOffsetFromView(offset, &closestView);
frameBounds.MoveTo(offset);
// If this is an inline frame and either the bounds height is 0 (quirks
// layout model) or aVPercent is not NS_PRESSHELL_SCROLL_ANYWHERE, we need to
// change the top of the bounds to include the whole line.
if (frameBounds.height == 0 || aVPercent != NS_PRESSHELL_SCROLL_ANYWHERE) {
nsIAtom* frameType = NULL;
nsIFrame *prevFrame = aFrame;
nsIFrame *frame = aFrame;
while (frame &&
(frameType = frame->GetType()) == nsLayoutAtoms::inlineFrame) {
prevFrame = frame;
frame = prevFrame->GetParent();
}
if (frame != aFrame &&
frame &&
frameType == nsLayoutAtoms::blockFrame) {
// find the line containing aFrame and increase the top of |offset|.
nsCOMPtr<nsILineIterator> lines( do_QueryInterface(frame) );
if (lines) {
PRInt32 index = -1;
lines->FindLineContaining(prevFrame, &index);
if (index >= 0) {
nsIFrame *trash1;
PRInt32 trash2;
nsRect lineBounds;
PRUint32 trash3;
if (NS_SUCCEEDED(lines->GetLine(index, &trash1, &trash2,
lineBounds, &trash3))) {
nsPoint blockOffset;
nsIView* blockView;
frame->GetOffsetFromView(blockOffset, &blockView);
if (blockView == closestView) {
// XXX If views not equal, this is hard. Do we want to bother?
nscoord newoffset = lineBounds.y + blockOffset.y;
if (newoffset < frameBounds.y)
frameBounds.y = newoffset;
}
}
}
}
}
}
NS_ASSERTION(closestView && !closestView->ToScrollableView(),
"What happened to the scrolled view? "
"The frame should not be directly in the scrolling view!");
// Walk up the view hierarchy. Make sure to add the view's position
// _after_ we get the parent and see whether it's scrollable. We want to
// make sure to get the scrolled view's position after it has been scrolled.
nsIScrollableView* scrollingView = nsnull;
while (closestView) {
nsIView* parent = closestView->GetParent();
if (parent) {
scrollingView = parent->ToScrollableView();
if (scrollingView) {
ScrollViewToShowRect(scrollingView, frameBounds, aVPercent, aHPercent);
}
}
frameBounds += closestView->GetPosition();;
closestView = parent;
}
return NS_OK;
}
// GetLinkLocation: copy link location to clipboard
NS_IMETHODIMP PresShell::GetLinkLocation(nsIDOMNode* aNode, nsAString& aLocationString)
{
#ifdef DEBUG_dr
printf("dr :: PresShell::GetLinkLocation\n");
#endif
NS_ENSURE_ARG_POINTER(aNode);
nsresult rv;
nsAutoString anchorText;
static char strippedChars[] = {'\t','\r','\n'};
// are we an anchor?
nsCOMPtr<nsIDOMHTMLAnchorElement> anchor(do_QueryInterface(aNode));
nsCOMPtr<nsIDOMHTMLAreaElement> area;
nsCOMPtr<nsIDOMHTMLLinkElement> link;
nsAutoString xlinkType;
if (anchor) {
rv = anchor->GetHref(anchorText);
NS_ENSURE_SUCCESS(rv, rv);
} else {
// area?
area = do_QueryInterface(aNode);
if (area) {
rv = area->GetHref(anchorText);
NS_ENSURE_SUCCESS(rv, rv);
} else {
// link?
link = do_QueryInterface(aNode);
if (link) {
rv = link->GetHref(anchorText);
NS_ENSURE_SUCCESS(rv, rv);
} else {
// Xlink?
nsCOMPtr<nsIDOMElement> element(do_QueryInterface(aNode));
if (element) {
NS_NAMED_LITERAL_STRING(xlinkNS,"http://www.w3.org/1999/xlink");
element->GetAttributeNS(xlinkNS,NS_LITERAL_STRING("type"),xlinkType);
if (xlinkType.EqualsLiteral("simple")) {
element->GetAttributeNS(xlinkNS,NS_LITERAL_STRING("href"),anchorText);
if (!anchorText.IsEmpty()) {
// Resolve the full URI using baseURI property
nsAutoString base;
nsCOMPtr<nsIDOM3Node> node(do_QueryInterface(aNode,&rv));
NS_ENSURE_SUCCESS(rv, rv);
node->GetBaseURI(base);
nsCOMPtr<nsIIOService>
ios(do_GetService("@mozilla.org/network/io-service;1", &rv));
NS_ENSURE_SUCCESS(rv, rv);
nsCOMPtr<nsIURI> baseURI;
rv = ios->NewURI(NS_ConvertUCS2toUTF8(base),nsnull,nsnull,getter_AddRefs(baseURI));
NS_ENSURE_SUCCESS(rv, rv);
nsCAutoString spec;
rv = baseURI->Resolve(NS_ConvertUCS2toUTF8(anchorText),spec);
NS_ENSURE_SUCCESS(rv, rv);
CopyUTF8toUTF16(spec, anchorText);
}
}
}
}
}
}
if (anchor || area || link || xlinkType.EqualsLiteral("simple")) {
//Remove all the '\t', '\r' and '\n' from 'anchorText'
anchorText.StripChars(strippedChars);
aLocationString = anchorText;
return NS_OK;
}
// if no link, fail.
return NS_ERROR_FAILURE;
}
NS_IMETHODIMP
PresShell::GetSelectionForCopy(nsISelection** outSelection)
{
nsresult rv = NS_OK;
*outSelection = nsnull;
if (!mDocument) return NS_ERROR_FAILURE;
nsCOMPtr<nsIContent> content;
nsCOMPtr<nsPIDOMWindow> ourWindow = do_QueryInterface(mDocument->GetScriptGlobalObject());
if (ourWindow) {
nsIFocusController *focusController = ourWindow->GetRootFocusController();
if (focusController) {
nsCOMPtr<nsIDOMElement> focusedElement;
focusController->GetFocusedElement(getter_AddRefs(focusedElement));
content = do_QueryInterface(focusedElement);
}
}
nsCOMPtr<nsISelection> sel;
if (content)
{
//check to see if we need to get selection from frame
//optimization that MAY need to be expanded as more things implement their own "selection"
nsCOMPtr<nsIDOMNSHTMLInputElement> htmlInputElement(do_QueryInterface(content));
nsCOMPtr<nsIDOMNSHTMLTextAreaElement> htmlTextAreaElement(do_QueryInterface(content));
if (htmlInputElement || htmlTextAreaElement)
{
nsIFrame *htmlInputFrame;
rv = GetPrimaryFrameFor(content, &htmlInputFrame);
if (NS_FAILED(rv)) return rv;
if (!htmlInputFrame) return NS_ERROR_FAILURE;
nsCOMPtr<nsISelectionController> selCon;
rv = htmlInputFrame->GetSelectionController(mPresContext,getter_AddRefs(selCon));
if (NS_FAILED(rv)) return rv;
if (!selCon) return NS_ERROR_FAILURE;
rv = selCon->GetSelection(nsISelectionController::SELECTION_NORMAL, getter_AddRefs(sel));
}
}
if (!sel) //get selection from this PresShell
rv = GetSelection(nsISelectionController::SELECTION_NORMAL, getter_AddRefs(sel));
*outSelection = sel;
NS_IF_ADDREF(*outSelection);
return rv;
}
NS_IMETHODIMP
PresShell::DoGetContents(const nsACString& aMimeType, PRUint32 aFlags, PRBool aSelectionOnly, nsAString& aOutValue)
{
aOutValue.Truncate();
if (!mDocument) return NS_ERROR_FAILURE;
nsresult rv;
nsCOMPtr<nsISelection> sel;
// Now we have the selection. Make sure it's nonzero:
if (aSelectionOnly)
{
rv = GetSelectionForCopy(getter_AddRefs(sel));
if (NS_FAILED(rv)) return rv;
if (!sel) return NS_ERROR_FAILURE;
PRBool isCollapsed;
sel->GetIsCollapsed(&isCollapsed);
if (isCollapsed)
return NS_OK;
}
// call the copy code
return nsCopySupport::GetContents(aMimeType, aFlags, sel,
mDocument, aOutValue);
}
NS_IMETHODIMP
PresShell::DoCopy()
{
if (!mDocument) return NS_ERROR_FAILURE;
nsCOMPtr<nsISelection> sel;
nsresult rv = GetSelectionForCopy(getter_AddRefs(sel));
if (NS_FAILED(rv))
return rv;
if (!sel)
return NS_ERROR_FAILURE;
// Now we have the selection. Make sure it's nonzero:
PRBool isCollapsed;
sel->GetIsCollapsed(&isCollapsed);
if (isCollapsed)
return NS_OK;
// call the copy code
rv = nsCopySupport::HTMLCopy(sel, mDocument, nsIClipboard::kGlobalClipboard);
if (NS_FAILED(rv))
return rv;
// Now that we have copied, update the Paste menu item
nsCOMPtr<nsIDOMWindowInternal> domWindow =
do_QueryInterface(mDocument->GetScriptGlobalObject());
if (domWindow)
{
domWindow->UpdateCommands(NS_LITERAL_STRING("clipboard"));
}
return NS_OK;
}
NS_IMETHODIMP
PresShell::CaptureHistoryState(nsILayoutHistoryState** aState, PRBool aLeavingPage)
{
nsresult rv = NS_OK;
NS_PRECONDITION(nsnull != aState, "null state pointer");
// We actually have to mess with the docshell here, since we want to
// store the state back in it.
// XXXbz this isn't really right, since this is being called in the
// content viewer's Hide() method... by that point the docshell's
// state could be wrong. We should sort out a better ownership
// model for the layout history state.
nsCOMPtr<nsISupports> container = mPresContext->GetContainer();
if (!container)
return NS_ERROR_FAILURE;
nsCOMPtr<nsIDocShell> docShell(do_QueryInterface(container));
if (!docShell)
return NS_ERROR_FAILURE;
nsCOMPtr<nsILayoutHistoryState> historyState;
docShell->GetLayoutHistoryState(getter_AddRefs(historyState));
if (!historyState) {
// Create the document state object
rv = NS_NewLayoutHistoryState(getter_AddRefs(historyState));
if (NS_FAILED(rv)) {
*aState = nsnull;
return rv;
}
docShell->SetLayoutHistoryState(historyState);
}
*aState = historyState;
NS_IF_ADDREF(*aState);
// Capture frame state for the entire frame hierarchy
nsIFrame* rootFrame = FrameManager()->GetRootFrame();
if (!rootFrame) return NS_OK;
// Capture frame state for the root scroll frame
// Don't capture state when first creating doc element heirarchy
// As the scroll position is 0 and this will cause us to loose
// our previously saved place!
if (aLeavingPage) {
nsIFrame* scrollFrame = GetRootScrollFrame(rootFrame);
if (scrollFrame) {
FrameManager()->CaptureFrameStateFor(scrollFrame, historyState,
nsIStatefulFrame::eDocumentScrollState);
}
}
FrameManager()->CaptureFrameState(rootFrame, historyState);
return NS_OK;
}
NS_IMETHODIMP
PresShell::GetGeneratedContentIterator(nsIContent* aContent,
GeneratedContentType aType,
nsIContentIterator** aIterator) const
{
nsIFrame* primaryFrame;
nsresult rv = NS_OK;
// Initialize OUT parameter
*aIterator = nsnull;
// Get the primary frame associated with the content object
GetPrimaryFrameFor(aContent, &primaryFrame);
if (primaryFrame) {
// See whether it's a request for the before or after generated content
if (Before == aType) {
nsIFrame* beforeFrame = nsLayoutUtils::GetBeforeFrame(primaryFrame);
if (beforeFrame) {
// Create an iterator
rv = NS_NewFrameContentIterator(mPresContext, beforeFrame, aIterator);
}
} else {
// Avoid finding the :after frame unless we need to (it's
// expensive). Instead probe for the existence of the pseudo-element
nsStyleContext *styleContext;
styleContext = primaryFrame->GetStyleContext();
if (nsLayoutUtils::HasPseudoStyle(aContent, styleContext,
nsCSSPseudoElements::after,
mPresContext)) {
nsIFrame* afterFrame = nsLayoutUtils::GetAfterFrame(primaryFrame);
if (afterFrame)
{
NS_ASSERTION(afterFrame->IsGeneratedContentFrame(),
"can't find generated content frame");
// Create an iterator
rv = NS_NewFrameContentIterator(mPresContext, afterFrame, aIterator);
}
}
}
}
return rv;
}
NS_IMETHODIMP
PresShell::SetAnonymousContentFor(nsIContent* aContent, nsISupportsArray* aAnonymousElements)
{
NS_PRECONDITION(aContent != nsnull, "null ptr");
if (! aContent)
return NS_ERROR_NULL_POINTER;
if (! mAnonymousContentTable) {
mAnonymousContentTable = new nsSupportsHashtable;
if (! mAnonymousContentTable)
return NS_ERROR_OUT_OF_MEMORY;
}
nsISupportsKey key(aContent);
nsCOMPtr<nsISupportsArray> oldAnonymousElements =
getter_AddRefs(NS_STATIC_CAST(nsISupportsArray*, mAnonymousContentTable->Get(&key)));
if (!oldAnonymousElements) {
if (aAnonymousElements) {
mAnonymousContentTable->Put(&key, aAnonymousElements);
}
} else {
if (aAnonymousElements) {
oldAnonymousElements->AppendElements(aAnonymousElements);
} else {
// If we're trying to clear anonymous content for an element that
// already had anonymous content, then we need to be sure to clean
// up after the old content. (This can happen, for example, when a
// reframe occurs.)
PRUint32 count;
oldAnonymousElements->Count(&count);
while (PRInt32(--count) >= 0) {
nsCOMPtr<nsIContent> content = do_QueryElementAt(oldAnonymousElements,
count);
NS_ASSERTION(content != nsnull, "not an nsIContent");
if (! content)
continue;
content->UnbindFromTree();
}
if (!mIsReleasingAnonymousContent)
mAnonymousContentTable->Remove(&key);
}
}
return NS_OK;
}
NS_IMETHODIMP
PresShell::GetAnonymousContentFor(nsIContent* aContent, nsISupportsArray** aAnonymousElements)
{
if (! mAnonymousContentTable) {
*aAnonymousElements = nsnull;
return NS_OK;
}
nsISupportsKey key(aContent);
*aAnonymousElements =
NS_REINTERPRET_CAST(nsISupportsArray*, mAnonymousContentTable->Get(&key)); // addrefs
return NS_OK;
}
static PRBool PR_CALLBACK
ClearDocumentEnumerator(nsHashKey* aKey, void* aData, void* aClosure)
{
nsISupportsArray* anonymousElements =
NS_STATIC_CAST(nsISupportsArray*, aData);
PRUint32 count;
anonymousElements->Count(&count);
while (PRInt32(--count) >= 0) {
nsCOMPtr<nsIContent> content = do_QueryElementAt(anonymousElements, count);
NS_ASSERTION(content != nsnull, "not an nsIContent");
if (! content)
continue;
content->UnbindFromTree();
}
return PR_TRUE;
}
NS_IMETHODIMP
PresShell::ReleaseAnonymousContent()
{
if (mAnonymousContentTable) {
mIsReleasingAnonymousContent = PR_TRUE;
mAnonymousContentTable->Enumerate(ClearDocumentEnumerator);
delete mAnonymousContentTable;
mAnonymousContentTable = nsnull;
}
return NS_OK;
}
NS_IMETHODIMP
PresShell::IsPaintingSuppressed(PRBool* aResult)
{
*aResult = mPaintingSuppressed;
return NS_OK;
}
void
PresShell::UnsuppressAndInvalidate()
{
if (!mPresContext->EnsureVisible(PR_FALSE)) {
// No point; we're about to be torn down anyway.
return;
}
mPaintingSuppressed = PR_FALSE;
nsIFrame* rootFrame = FrameManager()->GetRootFrame();
if (rootFrame) {
// let's assume that outline on a root frame is not supported
nsRect rect(nsPoint(0, 0), rootFrame->GetSize());
rootFrame->Invalidate(rect, PR_FALSE);
}
// This makes sure to get the same thing that nsPresContext::EnsureVisible()
// got.
nsCOMPtr<nsISupports> container = mPresContext->GetContainer();
nsCOMPtr<nsPIDOMWindow> ourWindow = do_GetInterface(container);
nsCOMPtr<nsIFocusController> focusController =
ourWindow ? ourWindow->GetRootFocusController() : nsnull;
if (ourWindow)
CheckForFocus(ourWindow, focusController, mDocument);
if (focusController) // Unsuppress now that we've shown the new window and focused it.
focusController->SetSuppressFocus(PR_FALSE, "PresShell suppression on Web page loads");
if (mViewManager)
mViewManager->SynthesizeMouseMove(PR_FALSE);
}
NS_IMETHODIMP
PresShell::UnsuppressPainting()
{
if (mPaintSuppressionTimer) {
mPaintSuppressionTimer->Cancel();
mPaintSuppressionTimer = nsnull;
}
if (mIsDocumentGone || !mPaintingSuppressed)
return NS_OK;
// If we have reflows pending, just wait until we process
// the reflows and get all the frames where we want them
// before actually unlocking the painting. Otherwise
// go ahead and unlock now.
if (mReflowCommands.Count() > 0)
mShouldUnsuppressPainting = PR_TRUE;
else
UnsuppressAndInvalidate();
return NS_OK;
}
NS_IMETHODIMP
PresShell::DisableThemeSupport()
{
// Doesn't have to be dynamic. Just set the bool.
mIsThemeSupportDisabled = PR_TRUE;
return NS_OK;
}
PRBool
PresShell::IsThemeSupportEnabled()
{
return !mIsThemeSupportDisabled;
}
// Post a request to handle an arbitrary callback after reflow has finished.
NS_IMETHODIMP
PresShell::PostReflowCallback(nsIReflowCallback* aCallback)
{
nsCallbackEventRequest* request = nsnull;
void* result = AllocateFrame(sizeof(nsCallbackEventRequest));
request = (nsCallbackEventRequest*)result;
request->callback = aCallback;
NS_ADDREF(aCallback);
request->next = nsnull;
if (mLastCallbackEventRequest) {
mLastCallbackEventRequest = mLastCallbackEventRequest->next = request;
} else {
mFirstCallbackEventRequest = request;
mLastCallbackEventRequest = request;
}
return NS_OK;
}
NS_IMETHODIMP
PresShell::CancelReflowCallback(nsIReflowCallback* aCallback)
{
nsCallbackEventRequest* before = nsnull;
nsCallbackEventRequest* node = mFirstCallbackEventRequest;
while(node)
{
nsIReflowCallback* callback = node->callback;
if (callback == aCallback)
{
nsCallbackEventRequest* toFree = node;
if (node == mFirstCallbackEventRequest) {
node = node->next;
mFirstCallbackEventRequest = node;
NS_ASSERTION(before == nsnull, "impossible");
} else {
node = node->next;
before->next = node;
}
if (toFree == mLastCallbackEventRequest) {
mLastCallbackEventRequest = before;
}
FreeFrame(sizeof(nsCallbackEventRequest), toFree);
NS_RELEASE(callback);
} else {
before = node;
node = node->next;
}
}
return NS_OK;
}
/**
* Post a request to handle a DOM event after Reflow has finished.
* The event must have been created with the "new" operator.
*/
NS_IMETHODIMP
PresShell::PostDOMEvent(nsIContent* aContent, nsEvent* aEvent)
{
// ok we have a list of events to handle. Queue them up and handle them
// after we finish reflow.
nsDOMEventRequest* request = nsnull;
void* result = AllocateFrame(sizeof(nsDOMEventRequest));
request = (nsDOMEventRequest*)result;
request->content = aContent;
NS_ADDREF(aContent);
request->event = aEvent;
request->next = nsnull;
if (mLastDOMEventRequest) {
mLastDOMEventRequest = mLastDOMEventRequest->next = request;
} else {
mFirstDOMEventRequest = request;
mLastDOMEventRequest = request;
}
return NS_OK;
}
/**
* Post a request to set and attribute after reflow has finished.
*/
NS_IMETHODIMP
PresShell::PostAttributeChange(nsIContent* aContent,
PRInt32 aNameSpaceID,
nsIAtom* aName,
const nsString& aValue,
PRBool aNotify,
nsAttributeChangeType aType)
{
// ok we have a list of events to handle. Queue them up and handle them
// after we finish reflow.
nsAttributeChangeRequest* request = nsnull;
void* result = AllocateFrame(sizeof(nsAttributeChangeRequest));
request = new (result) nsAttributeChangeRequest();
request->content = aContent;
NS_ADDREF(aContent);
request->nameSpaceID = aNameSpaceID;
request->name = aName;
request->value = aValue;
request->notify = aNotify;
request->type = aType;
request->next = nsnull;
if (mLastAttributeRequest) {
mLastAttributeRequest = mLastAttributeRequest->next = request;
} else {
mFirstAttributeRequest = request;
mLastAttributeRequest = request;
}
return NS_OK;
}
void
PresShell::HandlePostedReflowCallbacks()
{
PRBool shouldFlush = PR_FALSE;
while (mFirstCallbackEventRequest) {
nsCallbackEventRequest* node = mFirstCallbackEventRequest;
mFirstCallbackEventRequest = node->next;
if (!mFirstCallbackEventRequest) {
mLastCallbackEventRequest = nsnull;
}
nsIReflowCallback* callback = node->callback;
FreeFrame(sizeof(nsCallbackEventRequest), node);
if (callback)
callback->ReflowFinished(this, &shouldFlush);
NS_IF_RELEASE(callback);
}
if (shouldFlush)
FlushPendingNotifications(Flush_Layout);
}
void
PresShell::HandlePostedDOMEvents()
{
while(mFirstDOMEventRequest)
{
/* pull the node from the event request list. Be prepared for reentrant access to the list
from within HandleDOMEvent and its callees! */
nsDOMEventRequest* node = mFirstDOMEventRequest;
nsEventStatus status = nsEventStatus_eIgnore;
mFirstDOMEventRequest = node->next;
if (nsnull == mFirstDOMEventRequest) {
mLastDOMEventRequest = nsnull;
}
node->content->HandleDOMEvent(mPresContext, node->event, nsnull, NS_EVENT_FLAG_INIT, &status);
NS_RELEASE(node->content);
delete node->event;
node->nsDOMEventRequest::~nsDOMEventRequest(); // doesn't do anything, but just in case
FreeFrame(sizeof(nsDOMEventRequest), node);
}
}
void
PresShell::HandlePostedAttributeChanges()
{
while(mFirstAttributeRequest)
{
/* pull the node from the request list. Be prepared for reentrant access to the list
from within SetAttribute/UnsetAttribute and its callees! */
nsAttributeChangeRequest* node = mFirstAttributeRequest;
mFirstAttributeRequest = node->next;
if (nsnull == mFirstAttributeRequest) {
mLastAttributeRequest = nsnull;
}
if (node->type == eChangeType_Set)
node->content->SetAttr(node->nameSpaceID, node->name, node->value, node->notify);
else
node->content->UnsetAttr(node->nameSpaceID, node->name, node->notify);
NS_RELEASE(node->content);
node->nsAttributeChangeRequest::~nsAttributeChangeRequest();
FreeFrame(sizeof(nsAttributeChangeRequest), node);
}
}
NS_IMETHODIMP
PresShell::IsSafeToFlush(PRBool& aIsSafeToFlush)
{
aIsSafeToFlush = PR_TRUE;
if (mIsReflowing || mChangeNestCount) {
// Not safe if we are reflowing or in the middle of frame construction
aIsSafeToFlush = PR_FALSE;
} else {
// Not safe if we are painting
nsIViewManager* viewManager = GetViewManager();
if (viewManager) {
PRBool isPainting = PR_FALSE;
viewManager->IsPainting(isPainting);
if (isPainting) {
aIsSafeToFlush = PR_FALSE;
}
}
}
return NS_OK;
}
NS_IMETHODIMP
PresShell::FlushPendingNotifications(mozFlushType aType)
{
NS_ASSERTION(aType & (Flush_StyleReresolves | Flush_OnlyReflow |
Flush_OnlyPaint),
"Why did we get called?");
PRBool isSafeToFlush;
IsSafeToFlush(isSafeToFlush);
NS_ASSERTION(!isSafeToFlush || mViewManager, "Must have view manager");
// Make sure the view manager stays alive while batching view updates.
nsCOMPtr<nsIViewManager> viewManager = mViewManager;
if (isSafeToFlush && viewManager) {
// Style reresolves not in conjunction with reflows can't cause
// painting or geometry changes, so don't bother with view update
// batching if we only have style reresolve
viewManager->BeginUpdateViewBatch();
if (aType & Flush_StyleReresolves) {
// Processing pending restyles can kill us, and some callers only
// hold weak refs when calling FlushPendingNotifications(). :(
nsCOMPtr<nsIPresShell> kungFuDeathGrip(this);
mFrameConstructor->ProcessPendingRestyles();
if (mIsDestroying) {
// We no longer have a view manager and all that.
// XXX FIXME: Except we're in the middle of a view update batch... We
// need to address that somehow. See bug 369165.
return NS_OK;
}
mDocument->BindingManager()->ProcessAttachedQueue();
if (mIsDestroying) {
// We no longer have a view manager and all that.
// XXX FIXME: Except we're in the middle of a view update batch... We
// need to address that somehow. See bug 369165.
return NS_OK;
}
}
if (aType & Flush_OnlyReflow) {
mFrameConstructor->RecalcQuotesAndCounters();
ProcessReflowCommands(PR_FALSE);
}
PRUint32 updateFlags = NS_VMREFRESH_NO_SYNC;
if (aType & Flush_OnlyPaint) {
// Flushing paints, so perform the invalidates and drawing
// immediately
updateFlags = NS_VMREFRESH_IMMEDIATE;
}
else if (!(aType & Flush_OnlyReflow)) {
// Not flushing reflows, so do deferred invalidates. This will keep us
// from possibly flushing out reflows due to invalidates being processed
// at the end of this view batch.
updateFlags = NS_VMREFRESH_DEFERRED;
}
viewManager->EndUpdateViewBatch(updateFlags);
}
return NS_OK;
}
NS_IMETHODIMP
PresShell::IsReflowLocked(PRBool* aIsReflowLocked)
{
*aIsReflowLocked = mIsReflowing;
return NS_OK;
}
NS_IMETHODIMP
PresShell::BeginReflowBatching()
{
mBatchReflows = PR_TRUE;
return NS_OK;
}
NS_IMETHODIMP
PresShell::EndReflowBatching(PRBool aFlushPendingReflows)
{
nsresult rv = NS_OK;
mBatchReflows = PR_FALSE;
if (aFlushPendingReflows) {
rv = FlushPendingNotifications(Flush_OnlyReflow);
}
else {
PostReflowEvent();
}
return rv;
}
NS_IMETHODIMP
PresShell::GetReflowBatchingStatus(PRBool* aIsBatching)
{
*aIsBatching = mBatchReflows;
return NS_OK;
}
void
PresShell::CharacterDataChanged(nsIDocument *aDocument,
nsIContent* aContent,
PRBool aAppend)
{
NS_PRECONDITION(!mIsDocumentGone, "Unexpected CharacterDataChanged");
NS_PRECONDITION(aDocument == mDocument, "Unexpected aDocument");
WillCauseReflow();
mFrameConstructor->CharacterDataChanged(aContent, aAppend);
VERIFY_STYLE_TREE;
DidCauseReflow();
}
void
PresShell::ContentStatesChanged(nsIDocument* aDocument,
nsIContent* aContent1,
nsIContent* aContent2,
PRInt32 aStateMask)
{
NS_PRECONDITION(!mIsDocumentGone, "Unexpected ContentStatesChanged");
NS_PRECONDITION(aDocument == mDocument, "Unexpected aDocument");
WillCauseReflow();
mFrameConstructor->ContentStatesChanged(aContent1, aContent2, aStateMask);
VERIFY_STYLE_TREE;
DidCauseReflow();
}
void
PresShell::AttributeChanged(nsIDocument *aDocument,
nsIContent* aContent,
PRInt32 aNameSpaceID,
nsIAtom* aAttribute,
PRInt32 aModType)
{
NS_PRECONDITION(!mIsDocumentGone, "Unexpected AttributeChanged");
NS_PRECONDITION(aDocument == mDocument, "Unexpected aDocument");
NS_PRESSHELL_NOTIFY_OBSERVERS(AttributeChanged,
(aDocument, aContent, aNameSpaceID,
aAttribute, aModType));
// XXXwaterson it might be more elegant to wait until after the
// initial reflow to begin observing the document. That would
// squelch any other inappropriate notifications as well.
if (mDidInitialReflow) {
WillCauseReflow();
mFrameConstructor->AttributeChanged(aContent, aNameSpaceID,
aAttribute, aModType);
VERIFY_STYLE_TREE;
DidCauseReflow();
}
}
void
PresShell::ContentAppended(nsIDocument *aDocument,
nsIContent* aContainer,
PRInt32 aNewIndexInContainer)
{
NS_PRECONDITION(!mIsDocumentGone, "Unexpected ContentAppended");
NS_PRECONDITION(aDocument == mDocument, "Unexpected aDocument");
NS_PRESSHELL_NOTIFY_OBSERVERS(ContentAppended,
(aDocument, aContainer,
aNewIndexInContainer));
if (!mDidInitialReflow) {
return;
}
WillCauseReflow();
MOZ_TIMER_DEBUGLOG(("Start: Frame Creation: PresShell::ContentAppended(), this=%p\n", this));
MOZ_TIMER_START(mFrameCreationWatch);
mFrameConstructor->ContentAppended(aContainer, aNewIndexInContainer);
VERIFY_STYLE_TREE;
MOZ_TIMER_DEBUGLOG(("Stop: Frame Creation: PresShell::ContentAppended(), this=%p\n", this));
MOZ_TIMER_STOP(mFrameCreationWatch);
DidCauseReflow();
}
void
PresShell::ContentInserted(nsIDocument* aDocument,
nsIContent* aContainer,
nsIContent* aChild,
PRInt32 aIndexInContainer)
{
NS_PRECONDITION(!mIsDocumentGone, "Unexpected ContentInserted");
NS_PRECONDITION(aDocument == mDocument, "Unexpected aDocument");
NS_PRESSHELL_NOTIFY_OBSERVERS(ContentInserted,
(aDocument, aContainer, aChild,
aIndexInContainer));
if (!mDidInitialReflow) {
return;
}
WillCauseReflow();
mFrameConstructor->ContentInserted(aContainer, nsnull, aChild,
aIndexInContainer, nsnull, PR_FALSE);
VERIFY_STYLE_TREE;
DidCauseReflow();
}
void
PresShell::ContentRemoved(nsIDocument *aDocument,
nsIContent* aContainer,
nsIContent* aChild,
PRInt32 aIndexInContainer)
{
NS_PRECONDITION(!mIsDocumentGone, "Unexpected ContentRemoved");
NS_PRECONDITION(aDocument == mDocument, "Unexpected aDocument");
NS_PRESSHELL_NOTIFY_OBSERVERS(ContentRemoved,
(aDocument, aContainer, aChild,
aIndexInContainer));
// XXX fix for bug 304383. Remove when bug 287813 is fixed?
if (mCaret) {
nsIFrame* frame = nsnull;
GetPrimaryFrameFor(aChild, &frame);
if (frame && (frame->GetStateBits() & NS_FRAME_EXTERNAL_REFERENCE)) {
mCaret->EraseCaret();
}
}
// Notify the ESM that the content has been removed, so that
// it can clean up any state related to the content.
mPresContext->EventStateManager()->ContentRemoved(aChild);
WillCauseReflow();
mFrameConstructor->ContentRemoved(aContainer, aChild,
aIndexInContainer, PR_FALSE);
// If we have no root content node at this point, be sure to reset
// mDidInitialReflow to PR_FALSE, this will allow InitialReflow()
// to be called again should a new root node be inserted for this
// presShell. (Bug 167355)
if (mDocument && !mDocument->GetRootContent())
mDidInitialReflow = PR_FALSE;
VERIFY_STYLE_TREE;
DidCauseReflow();
}
nsresult
PresShell::ReconstructFrames(void)
{
nsresult rv = NS_OK;
WillCauseReflow();
rv = mFrameConstructor->ReconstructDocElementHierarchy();
VERIFY_STYLE_TREE;
DidCauseReflow();
return rv;
}
void
nsIPresShell::ReconstructStyleDataInternal()
{
if (NS_UNLIKELY(NS_STATIC_CAST(PresShell*, this)->mIsDestroying))
return;
mStylesHaveChanged = PR_FALSE;
if (!mDidInitialReflow) {
// Nothing to do here, since we have no frames yet
return;
}
nsIContent* root = mDocument->GetRootContent();
if (!root) {
// No content to restyle
return;
}
mFrameConstructor->PostRestyleEvent(root, eReStyle_Self, NS_STYLE_HINT_NONE);
#ifdef ACCESSIBILITY
InvalidateAccessibleSubtree(nsnull);
#endif
}
void
nsIPresShell::ReconstructStyleDataExternal()
{
if (NS_UNLIKELY(NS_STATIC_CAST(PresShell*, this)->mIsDestroying))
return;
ReconstructStyleDataInternal();
FlushPendingNotifications(Flush_Style);
}
void
PresShell::StyleSheetAdded(nsIDocument *aDocument,
nsIStyleSheet* aStyleSheet,
PRBool aDocumentSheet)
{
// We only care when enabled sheets are added
NS_PRECONDITION(aStyleSheet, "Must have a style sheet!");
PRBool applicable;
aStyleSheet->GetApplicable(applicable);
if (applicable && aStyleSheet->HasRules()) {
mStylesHaveChanged = PR_TRUE;
}
}
void
PresShell::StyleSheetRemoved(nsIDocument *aDocument,
nsIStyleSheet* aStyleSheet,
PRBool aDocumentSheet)
{
// We only care when enabled sheets are removed
NS_PRECONDITION(aStyleSheet, "Must have a style sheet!");
PRBool applicable;
aStyleSheet->GetApplicable(applicable);
if (applicable && aStyleSheet->HasRules()) {
mStylesHaveChanged = PR_TRUE;
}
}
void
PresShell::StyleSheetApplicableStateChanged(nsIDocument *aDocument,
nsIStyleSheet* aStyleSheet,
PRBool aApplicable)
{
if (aStyleSheet->HasRules()) {
mStylesHaveChanged = PR_TRUE;
}
}
void
PresShell::StyleRuleChanged(nsIDocument *aDocument,
nsIStyleSheet* aStyleSheet,
nsIStyleRule* aOldStyleRule,
nsIStyleRule* aNewStyleRule)
{
mStylesHaveChanged = PR_TRUE;
}
void
PresShell::StyleRuleAdded(nsIDocument *aDocument,
nsIStyleSheet* aStyleSheet,
nsIStyleRule* aStyleRule)
{
mStylesHaveChanged = PR_TRUE;
}
void
PresShell::StyleRuleRemoved(nsIDocument *aDocument,
nsIStyleSheet* aStyleSheet,
nsIStyleRule* aStyleRule)
{
mStylesHaveChanged = PR_TRUE;
}
NS_IMETHODIMP
PresShell::GetPrimaryFrameFor(nsIContent* aContent,
nsIFrame** aResult) const
{
*aResult = FrameManager()->GetPrimaryFrameFor(aContent);
return NS_OK;
}
NS_IMETHODIMP
PresShell::GetLayoutObjectFor(nsIContent* aContent,
nsISupports** aResult) const
{
nsresult result = NS_ERROR_NULL_POINTER;
if ((nsnull!=aResult) && (nsnull!=aContent))
{
*aResult = nsnull;
nsIFrame *primaryFrame=nsnull;
result = GetPrimaryFrameFor(aContent, &primaryFrame);
if ((NS_SUCCEEDED(result)) && (nsnull!=primaryFrame))
{
result = primaryFrame->QueryInterface(NS_GET_IID(nsISupports),
(void**)aResult);
}
}
return result;
}
NS_IMETHODIMP
PresShell::GetPlaceholderFrameFor(nsIFrame* aFrame,
nsIFrame** aResult) const
{
*aResult = FrameManager()->GetPlaceholderFrameFor(aFrame);
return NS_OK;
}
#ifdef IBMBIDI
NS_IMETHODIMP
PresShell::SetCaretBidiLevel(PRUint8 aLevel)
{
// If the current level is undefined, we have just inserted new text.
// In this case, we don't want to reset the keyboard language
PRBool afterInsert = mBidiLevel & BIDI_LEVEL_UNDEFINED;
mBidiLevel = aLevel;
// PRBool parityChange = ((mBidiLevel ^ aLevel) & 1); // is the parity of the new level different from the current level?
// if (parityChange) // if so, change the keyboard language
if (mBidiKeyboard && !afterInsert)
mBidiKeyboard->SetLangFromBidiLevel(aLevel);
return NS_OK;
}
NS_IMETHODIMP
PresShell::GetCaretBidiLevel(PRUint8 *aOutLevel)
{
if (!aOutLevel) { return NS_ERROR_INVALID_ARG; }
*aOutLevel = mBidiLevel;
return NS_OK;
}
NS_IMETHODIMP
PresShell::UndefineCaretBidiLevel()
{
mBidiLevel |= BIDI_LEVEL_UNDEFINED;
return NS_OK;
}
NS_IMETHODIMP
PresShell::BidiStyleChangeReflow()
{
// Have the root frame's style context remap its style
nsIFrame* rootFrame = FrameManager()->GetRootFrame();
if (rootFrame) {
mStyleSet->ClearStyleData(mPresContext);
ReconstructFrames();
}
return NS_OK;
}
#endif // IBMBIDI
//nsIViewObserver
// Return TRUE if any clipping is to be done.
static PRBool ComputeClipRect(nsIFrame* aFrame, nsRect& aResult) {
const nsStyleDisplay* display = aFrame->GetStyleDisplay();
// 'clip' only applies to absolutely positioned elements, and is
// relative to the element's border edge. 'clip' applies to the entire
// element: border, padding, and content areas, and even scrollbars if
// there are any.
if (display->IsAbsolutelyPositioned() && (display->mClipFlags & NS_STYLE_CLIP_RECT)) {
nsSize size = aFrame->GetSize();
// Start with the 'auto' values and then factor in user specified values
nsRect clipRect(0, 0, size.width, size.height);
if (display->mClipFlags & NS_STYLE_CLIP_RECT) {
if (0 == (NS_STYLE_CLIP_TOP_AUTO & display->mClipFlags)) {
clipRect.y = display->mClip.y;
}
if (0 == (NS_STYLE_CLIP_LEFT_AUTO & display->mClipFlags)) {
clipRect.x = display->mClip.x;
}
if (0 == (NS_STYLE_CLIP_RIGHT_AUTO & display->mClipFlags)) {
clipRect.width = display->mClip.width;
}
if (0 == (NS_STYLE_CLIP_BOTTOM_AUTO & display->mClipFlags)) {
clipRect.height = display->mClip.height;
}
}
aResult = clipRect;
return PR_TRUE;
}
return PR_FALSE;
}
// If the element is absolutely positioned and has a specified clip rect
// then it pushes the current rendering context and sets the clip rect.
// Returns PR_TRUE if the clip rect is set and PR_FALSE otherwise
static PRBool
SetClipRect(nsIRenderingContext& aRenderingContext, nsIFrame* aFrame)
{
nsRect clipRect;
if (ComputeClipRect(aFrame, clipRect)) {
// Set updated clip-rect into the rendering context
aRenderingContext.PushState();
aRenderingContext.SetClipRect(clipRect, nsClipCombine_kIntersect);
return PR_TRUE;
}
return PR_FALSE;
}
static PRBool
InClipRect(nsIFrame* aFrame, nsPoint& aEventPoint)
{
nsRect clipRect;
if (ComputeClipRect(aFrame, clipRect)) {
return clipRect.Contains(aEventPoint);
} else {
return PR_TRUE;
}
}
NS_IMETHODIMP
PresShell::Paint(nsIView *aView,
nsIRenderingContext& aRenderingContext,
const nsRect& aDirtyRect)
{
nsIFrame* frame;
nsresult rv = NS_OK;
if (mIsDestroying) {
NS_ASSERTION(PR_FALSE, "A paint message was dispatched to a destroyed PresShell");
return NS_OK;
}
NS_ASSERTION(!(nsnull == aView), "null view");
frame = NS_STATIC_CAST(nsIFrame*, aView->GetClientData());
if (nsnull != frame)
{
if (mCaret)
mCaret->EraseCaret();
// If the frame is absolutely positioned, then the 'clip' property
// applies
PRBool setClipRect = SetClipRect(aRenderingContext, frame);
rv = frame->Paint(mPresContext, aRenderingContext, aDirtyRect,
NS_FRAME_PAINT_LAYER_BACKGROUND);
rv = frame->Paint(mPresContext, aRenderingContext, aDirtyRect,
NS_FRAME_PAINT_LAYER_FLOATS);
rv = frame->Paint(mPresContext, aRenderingContext, aDirtyRect,
NS_FRAME_PAINT_LAYER_FOREGROUND);
if (setClipRect)
aRenderingContext.PopState();
#ifdef NS_DEBUG
// Draw a border around the frame
if (nsIFrameDebug::GetShowFrameBorders()) {
nsRect r = frame->GetRect();
aRenderingContext.SetColor(NS_RGB(0,0,255));
aRenderingContext.DrawRect(0, 0, r.width, r.height);
}
// Draw a border around the current event target
if ((nsIFrameDebug::GetShowEventTargetFrameBorder()) && (aView == mCurrentTargetView)) {
aRenderingContext.SetColor(NS_RGB(128,0,128));
aRenderingContext.DrawRect(mCurrentTargetRect.x, mCurrentTargetRect.y, mCurrentTargetRect.width, mCurrentTargetRect.height);
}
#endif
}
return rv;
}
nsIFrame*
PresShell::GetCurrentEventFrame()
{
if (!mCurrentEventFrame && mCurrentEventContent) {
// Make sure the content still has a document reference. If not,
// then we assume it is no longer in the content tree and the
// frame shouldn't get an event, nor should we even assume its
// safe to try and find the frame.
if (mCurrentEventContent->GetDocument()) {
GetPrimaryFrameFor(mCurrentEventContent, &mCurrentEventFrame);
}
}
return mCurrentEventFrame;
}
NS_IMETHODIMP
PresShell::GetEventTargetFrame(nsIFrame** aFrame)
{
*aFrame = GetCurrentEventFrame();
return NS_OK;
}
NS_IMETHODIMP
PresShell::GetEventTargetContent(nsEvent* aEvent, nsIContent** aContent)
{
if (mCurrentEventContent) {
*aContent = mCurrentEventContent;
NS_IF_ADDREF(*aContent);
} else {
nsIFrame* currentEventFrame = GetCurrentEventFrame();
if (currentEventFrame) {
currentEventFrame->GetContentForEvent(mPresContext, aEvent, aContent);
} else {
*aContent = nsnull;
}
}
return NS_OK;
}
void
PresShell::PushCurrentEventInfo(nsIFrame* aFrame, nsIContent* aContent)
{
if (mCurrentEventFrame || mCurrentEventContent) {
mCurrentEventFrameStack.InsertElementAt((void*)mCurrentEventFrame, 0);
mCurrentEventContentStack.InsertObjectAt(mCurrentEventContent, 0);
}
mCurrentEventFrame = aFrame;
mCurrentEventContent = aContent;
}
void
PresShell::PopCurrentEventInfo()
{
mCurrentEventFrame = nsnull;
mCurrentEventContent = nsnull;
if (0 != mCurrentEventFrameStack.Count()) {
mCurrentEventFrame = (nsIFrame*)mCurrentEventFrameStack.ElementAt(0);
mCurrentEventFrameStack.RemoveElementAt(0);
mCurrentEventContent = mCurrentEventContentStack.ObjectAt(0);
mCurrentEventContentStack.RemoveObjectAt(0);
}
}
PRBool PresShell::InZombieDocument(nsIContent *aContent)
{
// If a content node points to a null document, or the document is not
// attached to a window, then it is possibly in a zombie document,
// about to be replaced by a newly loading document.
// Such documents cannot handle DOM events.
// It might actually be in a node not attached to any document,
// in which case there is not parent presshell to retarget it to.
nsIDocument *doc = aContent->GetDocument();
return !doc || !doc->GetScriptGlobalObject();
}
nsresult PresShell::RetargetEventToParent(nsIView *aView,
nsGUIEvent* aEvent,
nsEventStatus* aEventStatus,
PRBool aForceHandle,
PRBool& aHandled,
nsIContent* aZombieFocusedContent)
{
// Send this events straight up to the parent pres shell.
// We do this for non-mouse events in zombie documents.
// That way at least the UI key bindings can work.
// First, eliminate the focus ring in the current docshell, which
// is now a zombie. If we key navigate, it won't be within this
// docshell, until the newly loading document is displayed.
nsCOMPtr<nsIPresShell> kungFuDeathGrip(this);
// hold a reference to the ESM across event dispatch
nsCOMPtr<nsIEventStateManager> esm = mPresContext->EventStateManager();
esm->SetContentState(nsnull, NS_EVENT_STATE_FOCUS);
esm->SetFocusedContent(nsnull);
ContentStatesChanged(mDocument, aZombieFocusedContent,
nsnull, NS_EVENT_STATE_FOCUS);
// Next, update the display so the old focus ring is no longer visible
nsCOMPtr<nsISupports> container = mPresContext->GetContainer();
if (!container)
container = do_QueryReferent(mForwardingContainer);
nsCOMPtr<nsIDocShell> docShell(do_QueryInterface(container));
if (!docShell) {
// We don't have any place to send this event.
NS_WARNING("dropping event, no forwarding shell");
return NS_OK;
}
nsCOMPtr<nsIContentViewer> contentViewer;
docShell->GetContentViewer(getter_AddRefs(contentViewer));
if (contentViewer) {
nsCOMPtr<nsIContentViewer> zombieViewer;
contentViewer->GetPreviousViewer(getter_AddRefs(zombieViewer));
if (zombieViewer) {
zombieViewer->Show();
}
}
// Now, find the parent pres shell and send the event there
nsCOMPtr<nsIDocShellTreeItem> treeItem =
do_QueryInterface(container);
NS_ASSERTION(treeItem, "No tree item for container.");
nsCOMPtr<nsIDocShellTreeItem> parentTreeItem;
treeItem->GetParent(getter_AddRefs(parentTreeItem));
nsCOMPtr<nsIDocShell> parentDocShell =
do_QueryInterface(parentTreeItem);
if (!parentDocShell || treeItem == parentTreeItem) {
return NS_ERROR_FAILURE;
}
nsCOMPtr<nsIPresShell> parentPresShell;
parentDocShell->GetPresShell(getter_AddRefs(parentPresShell));
nsCOMPtr<nsIViewObserver> parentViewObserver =
do_QueryInterface(parentPresShell);
if (!parentViewObserver) {
return NS_ERROR_FAILURE;
}
PopCurrentEventInfo();
return parentViewObserver->HandleEvent(aView, aEvent,
aEventStatus,
aForceHandle,
aHandled);
}
NS_IMETHODIMP
PresShell::HandleEvent(nsIView *aView,
nsGUIEvent* aEvent,
nsEventStatus* aEventStatus,
PRBool aForceHandle,
PRBool& aHandled)
{
NS_ASSERTION(aView, "null view");
aHandled = PR_TRUE;
if (mIsDestroying || mIsReflowing || mChangeNestCount) {
return NS_OK;
}
#ifdef ACCESSIBILITY
if (aEvent->eventStructType == NS_ACCESSIBLE_EVENT) {
return HandleEventInternal(aEvent, aView,
NS_EVENT_FLAG_INIT, aEventStatus);
}
#endif
// Check for a theme change up front, since the frame type is irrelevant
if (aEvent->message == NS_THEMECHANGED && mPresContext) {
mPresContext->ThemeChanged();
return NS_OK;
}
// Check for a system color change up front, since the frame type is
// irrelevant
if ((aEvent->message == NS_SYSCOLORCHANGED) && mPresContext) {
nsIViewManager* vm = GetViewManager();
if (vm) {
// Only dispatch system color change when the message originates from
// from the root views widget. This is necessary to prevent us from
// dispatching the SysColorChanged notification for each child window
// which may be redundant.
nsIView *view;
vm->GetRootView(view);
if (view == aView) {
aHandled = PR_TRUE;
*aEventStatus = nsEventStatus_eConsumeDoDefault;
mPresContext->SysColorChanged();
return NS_OK;
}
}
return NS_OK;
}
nsIFrame* frame = NS_STATIC_CAST(nsIFrame*, aView->GetClientData());
// if this event has no frame, we need to retarget it at a parent
// view that has a frame.
if (!frame &&
((NS_IS_KEY_EVENT(aEvent) || NS_IS_IME_EVENT(aEvent)))) {
nsIView* targetView = aView;
while (targetView && !targetView->GetClientData()) {
targetView = targetView->GetParent();
}
if (targetView) {
aEvent->point += aView->GetOffsetTo(targetView);
aView = targetView;
frame = NS_STATIC_CAST(nsIFrame*, aView->GetClientData());
}
}
nsresult rv = NS_OK;
if (frame) {
PushCurrentEventInfo(nsnull, nsnull);
// key and IME events go to the focused frame
nsCOMPtr<nsIEventStateManager> manager;
if ((NS_IS_KEY_EVENT(aEvent) || NS_IS_IME_EVENT(aEvent) ||
aEvent->message == NS_CONTEXTMENU_KEY)) {
nsIEventStateManager *esm = mPresContext->EventStateManager();
esm->GetFocusedFrame(&mCurrentEventFrame);
if (mCurrentEventFrame) {
esm->GetFocusedContent(getter_AddRefs(mCurrentEventContent));
}
else {
#if defined(MOZ_X11) || defined(XP_WIN)
#if defined(MOZ_X11)
if (NS_IS_IME_EVENT(aEvent)) {
// bug 52416 (MOZ_X11)
// Lookup region (candidate window) of UNIX IME grabs
// input focus from Mozilla but wants to send IME event
// to redraw pre-edit (composed) string
// If Mozilla does not have input focus and event is IME,
// sends IME event to pre-focused element
#else
if (NS_IS_KEY_EVENT(aEvent) || NS_IS_IME_EVENT(aEvent)) {
// bug 292263 (XP_WIN)
// If software keyboard has focus, it may send the key messages and
// the IME messages to pre-focused window. Therefore, if Mozilla
// doesn't have focus and event is key event or IME event, we should
// send the events to pre-focused element.
#endif /* defined(MOZ_X11) */
nsCOMPtr<nsPIDOMWindow> ourWindow = do_QueryInterface(mDocument->GetScriptGlobalObject());
if (ourWindow) {
nsIFocusController *focusController =
ourWindow->GetRootFocusController();
if (focusController) {
PRBool active = PR_FALSE;
// check input focus is in Mozilla
focusController->GetActive(&active);
if (!active) {
// if not, search for pre-focused element
nsCOMPtr<nsIDOMElement> focusedElement;
focusController->GetFocusedElement(getter_AddRefs(focusedElement));
if (focusedElement) {
// get mCurrentEventContent from focusedElement
mCurrentEventContent = do_QueryInterface(focusedElement);
}
}
}
}
}
#endif /* defined(MOZ_X11) || defined(XP_WIN) */
if (!mCurrentEventContent) {
mCurrentEventContent = mDocument->GetRootContent();
}
mCurrentEventFrame = nsnull; // XXXldb Isn't it already?
}
if (mCurrentEventContent && InZombieDocument(mCurrentEventContent)) {
return RetargetEventToParent(aView, aEvent, aEventStatus, aForceHandle,
aHandled, mCurrentEventContent);
}
}
else if (!InClipRect(frame, aEvent->point)) {
// we only check for the clip rect on this frame ... all frames with clip
// have views so any viewless children of this frame cannot have clip.
// Furthermore if the event is not in the clip for this frame, then none
// of the children can get it either.
if (aForceHandle) {
mCurrentEventFrame = frame;
}
else {
mCurrentEventFrame = nsnull;
}
aHandled = PR_FALSE;
rv = NS_OK;
} else {
// aEvent->point is relative to aView's upper left corner. We need
// a point that is in the same coordinate system as frame's rect
// so that the frame->mRect.Contains(aPoint) calls in
// GetFrameForPoint() work. The assumption here is that frame->GetView()
// will return aView, and frame's parent view is aView's parent.
nsPoint eventPoint = frame->GetPosition();
eventPoint += aEvent->point;
nsPoint originOffset;
nsIView *view = nsnull;
frame->GetOriginToViewOffset(originOffset, &view);
NS_ASSERTION(view == aView, "view != aView");
if (view == aView)
eventPoint -= originOffset;
rv = frame->GetFrameForPoint(eventPoint,
NS_FRAME_PAINT_LAYER_FOREGROUND,
&mCurrentEventFrame);
if (NS_FAILED(rv)) {
rv = frame->GetFrameForPoint(eventPoint,
NS_FRAME_PAINT_LAYER_FLOATS,
&mCurrentEventFrame);
if (NS_FAILED(rv)) {
rv = frame->GetFrameForPoint(eventPoint,
NS_FRAME_PAINT_LAYER_BACKGROUND,
&mCurrentEventFrame);
if (NS_FAILED (rv)) {
if (aForceHandle) {
mCurrentEventFrame = frame;
}
else {
mCurrentEventFrame = nsnull;
}
aHandled = PR_FALSE;
rv = NS_OK;
}
}
}
if (mCurrentEventFrame) {
nsCOMPtr<nsIContent> targetElement;
mCurrentEventFrame->GetContentForEvent(mPresContext, aEvent,
getter_AddRefs(targetElement));
// If there is no content for this frame, target it anyway. Some
// frames can be targeted but do not have content, particularly
// windows with scrolling off.
if (targetElement) {
// Bug 103055, bug 185889: mouse events apply to *elements*, not all
// nodes. Thus we get the nearest element parent here.
// XXX we leave the frame the same even if we find an element
// parent, so that the text frame will receive the event (selection
// and friends are the ones who care about that anyway)
//
// We use weak pointers because during this tight loop, the node
// will *not* go away. And this happens on every mousemove.
while (targetElement &&
!targetElement->IsContentOfType(nsIContent::eELEMENT)) {
targetElement = targetElement->GetParent();
}
// If we found an element, target it. Otherwise, target *nothing*.
if (!targetElement) {
mCurrentEventContent = nsnull;
mCurrentEventFrame = nsnull;
} else if (targetElement != mCurrentEventContent) {
mCurrentEventContent = targetElement;
}
}
}
}
if (GetCurrentEventFrame()) {
rv = HandleEventInternal(aEvent, aView,
NS_EVENT_FLAG_INIT, aEventStatus);
}
#ifdef NS_DEBUG
if ((nsIFrameDebug::GetShowEventTargetFrameBorder()) &&
(GetCurrentEventFrame())) {
nsIView *oldView = mCurrentTargetView;
nsPoint offset(0,0);
nsRect oldTargetRect(mCurrentTargetRect);
mCurrentTargetRect = mCurrentEventFrame->GetRect();
mCurrentTargetView = mCurrentEventFrame->GetView();
if (!mCurrentTargetView ) {
mCurrentEventFrame->GetOffsetFromView(offset, &mCurrentTargetView);
}
if (mCurrentTargetView) {
mCurrentTargetRect.x = offset.x;
mCurrentTargetRect.y = offset.y;
// use aView or mCurrentTargetView??
if ((mCurrentTargetRect != oldTargetRect) ||
(mCurrentTargetView != oldView)) {
nsIViewManager* vm = GetViewManager();
if (vm) {
vm->UpdateView(mCurrentTargetView,mCurrentTargetRect,0);
if (oldView)
vm->UpdateView(oldView,oldTargetRect,0);
}
}
}
}
#endif
PopCurrentEventInfo();
}
else {
// Focus events need to be dispatched even if no frame was found, since
// we don't want the focus controller to be out of sync.
if (!NS_EVENT_NEEDS_FRAME(aEvent)) {
mCurrentEventFrame = nsnull;
return HandleEventInternal(aEvent, aView,
NS_EVENT_FLAG_INIT, aEventStatus);
}
else if (NS_IS_KEY_EVENT(aEvent)) {
// Keypress events in new blank tabs should not be completely thrown away.
// Retarget them -- the parent chrome shell might make use of them.
return RetargetEventToParent(aView, aEvent, aEventStatus, aForceHandle,
aHandled, mCurrentEventContent);
}
aHandled = PR_FALSE;
}
return rv;
}
NS_IMETHODIMP
PresShell::HandleEventWithTarget(nsEvent* aEvent, nsIFrame* aFrame, nsIContent* aContent, PRUint32 aFlags, nsEventStatus* aStatus)
{
nsresult ret;
PushCurrentEventInfo(aFrame, aContent);
ret = HandleEventInternal(aEvent, nsnull, aFlags, aStatus);
PopCurrentEventInfo();
return NS_OK;
}
inline PRBool
IsSynthesizedMouseMove(nsEvent* aEvent)
{
return aEvent->eventStructType == NS_MOUSE_EVENT &&
NS_STATIC_CAST(nsMouseEvent*, aEvent)->reason != nsMouseEvent::eReal;
}
nsresult
PresShell::HandleEventInternal(nsEvent* aEvent, nsIView *aView,
PRUint32 aFlags, nsEventStatus* aStatus)
{
#ifdef ACCESSIBILITY
if (aEvent->eventStructType == NS_ACCESSIBLE_EVENT)
{
NS_STATIC_CAST(nsAccessibleEvent*, aEvent)->accessible = nsnull;
nsCOMPtr<nsIAccessibilityService> accService =
do_GetService("@mozilla.org/accessibilityService;1");
if (accService) {
nsCOMPtr<nsISupports> container = mPresContext->GetContainer();
if (!container) {
// This presshell is not active. This often happens when a
// preshell is being held onto for fastback.
return NS_OK;
}
nsIAccessible* acc;
nsCOMPtr<nsIDOMNode> domNode(do_QueryInterface(mDocument));
NS_ASSERTION(domNode, "No dom node for doc");
accService->GetAccessibleInShell(domNode, this, &acc);
// Addref this - it's not a COM Ptr
// We'll make sure the right number of Addref's occur before
// handing this back to the accessibility client
NS_STATIC_CAST(nsAccessibleEvent*, aEvent)->accessible = acc;
mIsAccessibilityActive = PR_TRUE;
return NS_OK;
}
}
#endif
nsCOMPtr<nsIEventStateManager> manager = mPresContext->EventStateManager();
nsresult rv = NS_OK;
// Grab the offset of aView from our root view. We can use this to adjust
// coordinates as needed. Note that we can't just adjust them later, because
// event dispatch can destroy aView. Also note that at times aView is null
// here. When that happens, there isn't much we can do about getting
// coordinates right....
nsPoint offsetOfaView(0,0);
if (aView) {
nsIView* rootView;
mViewManager->GetRootView(rootView);
offsetOfaView = aView->GetOffsetTo(rootView);
}
if (!NS_EVENT_NEEDS_FRAME(aEvent) || GetCurrentEventFrame()) {
PRBool isHandlingUserInput = PR_FALSE;
if (aEvent->internalAppFlags & NS_APP_EVENT_FLAG_TRUSTED) {
switch (aEvent->message) {
case NS_GOTFOCUS:
case NS_LOSTFOCUS:
case NS_ACTIVATE:
case NS_DEACTIVATE:
// Treat focus/blur events as user input if they happen while
// executing trusted script, or no script at all. If they
// happen during execution of non-trusted script, then they
// should not be considerd user input.
if (!nsContentUtils::IsCallerChrome()) {
break;
}
case NS_MOUSE_LEFT_BUTTON_DOWN:
case NS_MOUSE_MIDDLE_BUTTON_DOWN:
case NS_MOUSE_RIGHT_BUTTON_DOWN:
case NS_MOUSE_LEFT_BUTTON_UP:
case NS_MOUSE_RIGHT_BUTTON_UP:
case NS_MOUSE_MIDDLE_BUTTON_UP:
case NS_KEY_PRESS:
case NS_KEY_DOWN:
case NS_KEY_UP:
isHandlingUserInput = PR_TRUE;
}
}
nsAutoHandlingUserInputStatePusher userInpStatePusher(isHandlingUserInput);
nsAutoPopupStatePusher popupStatePusher(nsDOMEvent::GetEventPopupControlState(aEvent));
nsWeakView weakView(aView);
// 1. Give event to event manager for pre event state changes and
// generation of synthetic events.
rv = manager->PreHandleEvent(mPresContext, aEvent, mCurrentEventFrame,
aStatus, aView);
// 2. Give event to the DOM for third party and JS use.
if ((GetCurrentEventFrame()) && NS_SUCCEEDED(rv)) {
// We want synthesized mouse moves to cause mouseover and mouseout
// DOM events (PreHandleEvent above), but not mousemove DOM events.
if (!IsSynthesizedMouseMove(aEvent)) {
if (mCurrentEventContent) {
rv = mCurrentEventContent->HandleDOMEvent(mPresContext, aEvent, nsnull,
aFlags, aStatus);
}
else {
nsCOMPtr<nsIContent> targetContent;
rv = mCurrentEventFrame->GetContentForEvent(mPresContext, aEvent,
getter_AddRefs(targetContent));
if (NS_SUCCEEDED(rv) && targetContent) {
rv = targetContent->HandleDOMEvent(mPresContext, aEvent, nsnull,
aFlags, aStatus);
}
}
// Stopping propagation in the default group does not affect
// propagation in the system event group.
// (see also section 1.2.2.6 of the DOM3 Events Working Draft)
aEvent->flags &= ~NS_EVENT_FLAG_STOP_DISPATCH;
// 3. Give event to the Frames for browser default processing.
if (GetCurrentEventFrame() && NS_SUCCEEDED (rv) &&
aEvent->eventStructType != NS_EVENT) {
// If aView is non-null, adjust coordinates of aEvent to be in the
// coordinate system of mCurrentEventFrame's closest view. Don't use
// aView here, since it may be dead by now.
nsPoint offset(0,0);
if (aView) {
NS_ASSERTION(mViewManager,
"How did GetCurrentEventFrame() succeed?");
nsIView* rootView;
mViewManager->GetRootView(rootView);
nsIView* frameView;
nsPoint pt;
mCurrentEventFrame->GetOffsetFromView(pt, &frameView);
offset = frameView->GetOffsetTo(rootView) - offsetOfaView;
}
// Transform aEvent->point from aView's coordinate system to
// that of mCurrentEventFrame's closest view
aEvent->point -= offset;
rv = mCurrentEventFrame->HandleEvent(mPresContext, (nsGUIEvent*)aEvent,
aStatus);
// Now transform back
aEvent->point += offset;
}
// Continue with second dispatch to system event handlers.
// Need to null check mCurrentEventContent and mCurrentEventFrame
// since the previous dispatch could have nuked them.
if (mCurrentEventContent) {
rv = mCurrentEventContent->HandleDOMEvent(mPresContext, aEvent, nsnull,
aFlags | NS_EVENT_FLAG_SYSTEM_EVENT,
aStatus);
}
else if (mCurrentEventFrame) {
nsCOMPtr<nsIContent> targetContent;
rv = mCurrentEventFrame->GetContentForEvent(mPresContext, aEvent,
getter_AddRefs(targetContent));
if (NS_SUCCEEDED(rv) && targetContent) {
rv = targetContent->HandleDOMEvent(mPresContext, aEvent, nsnull,
aFlags | NS_EVENT_FLAG_SYSTEM_EVENT,
aStatus);
}
}
}
// 4. Give event to event manager for post event state changes and
// generation of synthetic events.
if (NS_SUCCEEDED (rv) &&
(GetCurrentEventFrame() || !NS_EVENT_NEEDS_FRAME(aEvent))) {
rv = manager->PostHandleEvent(mPresContext, aEvent, mCurrentEventFrame,
aStatus, weakView.GetView());
}
}
}
return rv;
}
// Dispatch event to content only (NOT full processing)
// See also HandleEventWithTarget which does full event processing.
NS_IMETHODIMP
PresShell::HandleDOMEventWithTarget(nsIContent* aTargetContent, nsEvent* aEvent, nsEventStatus* aStatus)
{
PushCurrentEventInfo(nsnull, aTargetContent);
// Bug 41013: Check if the event should be dispatched to content.
// It's possible that we are in the middle of destroying the window
// and the js context is out of date. This check detects the case
// that caused a crash in bug 41013, but there may be a better way
// to handle this situation!
nsCOMPtr<nsISupports> container = mPresContext->GetContainer();
if (container) {
// Dispatch event to content
aTargetContent->HandleDOMEvent(mPresContext, aEvent, nsnull,
NS_EVENT_FLAG_INIT, aStatus);
}
PopCurrentEventInfo();
return NS_OK;
}
NS_IMETHODIMP
PresShell::ResizeReflow(nsIView *aView, nscoord aWidth, nscoord aHeight)
{
return ResizeReflow(aWidth, aHeight);
}
NS_IMETHODIMP_(PRBool)
PresShell::IsVisible()
{
nsCOMPtr<nsISupports> container = mPresContext->GetContainer();
nsCOMPtr<nsIBaseWindow> bw = do_QueryInterface(container);
if (!bw)
return PR_FALSE;
PRBool res = PR_TRUE;
bw->GetVisibility(&res);
return res;
}
NS_IMETHODIMP_(void)
PresShell::WillPaint()
{
// Don't reenter reflow and don't reflow during frame construction. Also
// don't bother reflowing if some viewmanager in our tree is painting while
// we still have painting suppressed.
if (mIsReflowing || mChangeNestCount || mPaintingSuppressed) {
return;
}
// Process reflows, if we have them, to reduce flicker due to invalidates and
// reflow being interspersed. Note that we _do_ allow this to be
// interruptible; if we can't do all the reflows it's better to flicker a bit
// than to freeze up.
// XXXbz this update batch may not be strictly necessary, but it's good form.
// XXXbz should we be flushing out style changes here? Probably not, I'd say.
NS_ASSERTION(mViewManager, "Something weird is going on");
mViewManager->BeginUpdateViewBatch();
ProcessReflowCommands(PR_TRUE);
mViewManager->EndUpdateViewBatch(NS_VMREFRESH_NO_SYNC);
}
nsresult
PresShell::GetAgentStyleSheets(nsCOMArray<nsIStyleSheet>& aSheets)
{
aSheets.Clear();
PRInt32 sheetCount = mStyleSet->SheetCount(nsStyleSet::eAgentSheet);
for (PRInt32 i = 0; i < sheetCount; ++i) {
nsIStyleSheet *sheet = mStyleSet->StyleSheetAt(nsStyleSet::eAgentSheet, i);
if (!aSheets.AppendObject(sheet))
return NS_ERROR_OUT_OF_MEMORY;
}
return NS_OK;
}
nsresult
PresShell::SetAgentStyleSheets(const nsCOMArray<nsIStyleSheet>& aSheets)
{
return mStyleSet->ReplaceSheets(nsStyleSet::eAgentSheet, aSheets);
}
nsresult
PresShell::AddOverrideStyleSheet(nsIStyleSheet *aSheet)
{
return mStyleSet->PrependStyleSheet(nsStyleSet::eOverrideSheet, aSheet);
}
nsresult
PresShell::RemoveOverrideStyleSheet(nsIStyleSheet *aSheet)
{
return mStyleSet->RemoveStyleSheet(nsStyleSet::eOverrideSheet, aSheet);
}
static void
StopPluginInstance(PresShell *aShell, nsIContent *aContent)
{
nsIFrame *frame = aShell->FrameManager()->GetPrimaryFrameFor(aContent);
nsIObjectFrame *objectFrame = nsnull;
if (frame)
CallQueryInterface(frame, &objectFrame);
if (!objectFrame)
return;
nsCOMPtr<nsIPluginInstance> instance;
objectFrame->GetPluginInstance(*getter_AddRefs(instance));
if (!instance)
return;
// Note on the frame that it used to have a plugin instance, since
// we're about to make said instance go away
frame->SetProperty(nsLayoutAtoms::objectFrame, NS_INT32_TO_PTR(1));
// Check whether the plugin wants SetWindow to be called before or after
// Stop/Destroy. This is similar to nsObjectFrame::Destroy(), but we
// don't want to destroy the frame just yet.
PRBool callSetWindowLast = PR_FALSE;
instance->GetValue(nsPluginInstanceVariable_CallSetWindowAfterDestroyBool,
(void *) &callSetWindowLast);
if (callSetWindowLast) {
instance->Stop();
instance->Destroy();
instance->SetWindow(nsnull);
} else {
instance->Stop();
instance->SetWindow(nsnull);
instance->Destroy();
}
// XXXbz have to use the plugin manager contract because the plugin host
// registers for two different contracts with two difference CIDs! We want
// the plugin manager CID, since that's the one nsObjectFrame gets.
nsCOMPtr<nsIPluginHost> pluginHost =
do_GetService("@mozilla.org/plugin/manager;1");
if (pluginHost)
pluginHost->StopPluginInstance(instance);
}
PR_STATIC_CALLBACK(PRBool)
FreezeSubDocument(nsIDocument *aDocument, void *aData)
{
nsIPresShell *shell = aDocument->GetShellAt(0);
if (shell)
shell->Freeze();
return PR_TRUE;
}
void
PresShell::Freeze()
{
nsCOMPtr<nsIDOMDocument> domDoc = do_QueryInterface(mDocument);
if (domDoc) {
EnumeratePlugins(domDoc, NS_LITERAL_STRING("object"), StopPluginInstance);
EnumeratePlugins(domDoc, NS_LITERAL_STRING("applet"), StopPluginInstance);
EnumeratePlugins(domDoc, NS_LITERAL_STRING("embed"), StopPluginInstance);
}
if (mCaret)
mCaret->SetCaretVisible(PR_FALSE);
mPaintingSuppressed = PR_TRUE;
if (mDocument)
mDocument->EnumerateSubDocuments(FreezeSubDocument, nsnull);
}
static void
StartPluginInstance(PresShell *aShell, nsIContent *aContent)
{
// For now we just reconstruct the frame, but only if the element
// had a plugin instance before we stopped it. Other types of
// embedded content (eg SVG) become unhappy if we do a frame
// reconstruct here.
nsIFrame *frame = nsnull;
aShell->GetPrimaryFrameFor(aContent, &frame);
if (frame) {
nsIObjectFrame *objFrame = nsnull;
CallQueryInterface(frame, &objFrame);
if (objFrame && frame->GetProperty(nsLayoutAtoms::objectFrame)) {
// Note: no need to remove the property here, since we're about
// to blow away the frame
aShell->RecreateFramesFor(aContent);
}
}
}
PR_STATIC_CALLBACK(PRBool)
ThawSubDocument(nsIDocument *aDocument, void *aData)
{
nsIPresShell *shell = aDocument->GetShellAt(0);
if (shell)
shell->Thaw();
return PR_TRUE;
}
void
PresShell::Thaw()
{
nsCOMPtr<nsIDOMDocument> domDoc = do_QueryInterface(mDocument);
if (domDoc) {
EnumeratePlugins(domDoc, NS_LITERAL_STRING("object"), StartPluginInstance);
EnumeratePlugins(domDoc, NS_LITERAL_STRING("applet"), StartPluginInstance);
EnumeratePlugins(domDoc, NS_LITERAL_STRING("embed"), StartPluginInstance);
}
if (mDocument)
mDocument->EnumerateSubDocuments(ThawSubDocument, nsnull);
UnsuppressPainting();
}
void
PresShell::HidePopups()
{
nsIViewManager *vm = GetViewManager();
if (vm) {
nsIView *rootView = nsnull;
vm->GetRootView(rootView);
if (rootView)
HideViewIfPopup(rootView);
}
}
void
PresShell::BlockFlushing()
{
++mChangeNestCount;
}
void
PresShell::UnblockFlushing()
{
--mChangeNestCount;
}
// Based on nsDocument::AddObserver and nsDocumentObserverList::Contains
void
PresShell::AddObserver(nsIDocumentObserver* aObserver)
{
if (mObservers.IndexOf(aObserver) == -1) {
mObservers.AppendElement(aObserver);
}
}
// Based on nsDocumentObserverList::RemoveElement
PRBool
PresShell::RemoveObserver(nsIDocumentObserver* aObserver)
{
PRInt32 index = mObservers.IndexOf(aObserver);
if (index == -1) {
return PR_FALSE;
}
#ifdef DEBUG
PRBool removed =
#endif
mObservers.RemoveElementAt(index);
NS_ASSERTION(removed, "How could we fail to remove by index?");
return PR_TRUE;
}
//--------------------------------------------------------
// Start of protected and private methods on the PresShell
//--------------------------------------------------------
//-------------- Begin Reflow Event Definition ------------------------
struct ReflowEvent : public PLEvent {
ReflowEvent(nsIPresShell* aPresShell);
~ReflowEvent() { }
void HandleEvent() {
nsCOMPtr<nsIPresShell> presShell = do_QueryReferent(mPresShell);
if (presShell) {
#ifdef DEBUG
if (VERIFY_REFLOW_NOISY_RC & gVerifyReflowFlags) {
printf("\n*** Handling reflow event: PresShell=%p, event=%p\n", (void*)presShell.get(), (void*)this);
}
#endif
// XXX Statically cast the pres shell pointer so that we can call
// protected methods on the pres shell. (the ReflowEvent struct
// is a friend of the PresShell class)
PresShell* ps = NS_REINTERPRET_CAST(PresShell*, presShell.get());
PRBool isBatching;
ps->ClearReflowEventStatus();
ps->GetReflowBatchingStatus(&isBatching);
if (!isBatching) {
// Set a kung fu death grip on the view manager associated with the pres shell
// before processing that pres shell's reflow commands. Fixes bug 54868.
nsCOMPtr<nsIViewManager> viewManager = presShell->GetViewManager();
viewManager->BeginUpdateViewBatch();
ps->ProcessReflowCommands(PR_TRUE);
viewManager->EndUpdateViewBatch(NS_VMREFRESH_NO_SYNC);
// Now, explicitly release the pres shell before the view manager
presShell = nsnull;
viewManager = nsnull;
}
}
else
mPresShell = 0;
}
nsWeakPtr mPresShell;
};
static void PR_CALLBACK HandlePLEvent(ReflowEvent* aEvent)
{
aEvent->HandleEvent();
}
static void PR_CALLBACK DestroyPLEvent(ReflowEvent* aEvent)
{
delete aEvent;
}
ReflowEvent::ReflowEvent(nsIPresShell* aPresShell)
{
NS_ASSERTION(aPresShell, "Null parameters!");
mPresShell = do_GetWeakReference(aPresShell);
PL_InitEvent(this, aPresShell,
(PLHandleEventProc) ::HandlePLEvent,
(PLDestroyEventProc) ::DestroyPLEvent);
}
//-------------- End Reflow Event Definition ---------------------------
void
PresShell::PostReflowEvent()
{
nsCOMPtr<nsIEventQueue> eventQueue;
mEventQueueService->GetSpecialEventQueue(nsIEventQueueService::UI_THREAD_EVENT_QUEUE,
getter_AddRefs(eventQueue));
if (eventQueue != mReflowEventQueue && !mIsDestroying &&
!mIsReflowing && mReflowCommands.Count() > 0) {
ReflowEvent* ev = new ReflowEvent(NS_STATIC_CAST(nsIPresShell*, this));
if (NS_FAILED(eventQueue->PostEvent(ev))) {
NS_ERROR("failed to post reflow event");
PL_DestroyEvent(ev);
}
else {
mReflowEventQueue = eventQueue;
#ifdef DEBUG
if (VERIFY_REFLOW_NOISY_RC & gVerifyReflowFlags) {
printf("\n*** PresShell::PostReflowEvent(), this=%p, event=%p\n", (void*)this, (void*)ev);
}
#endif
}
}
}
nsresult
PresShell::DidCauseReflow()
{
NS_ASSERTION(mChangeNestCount != 0, "Unexpected call to DidCauseReflow()");
if (--mChangeNestCount == 0) {
// We may have had more reflow commands appended to the queue during
// our reflow. Make sure these get processed at some point.
if (!gAsyncReflowDuringDocLoad && mDocumentLoading) {
FlushPendingNotifications(Flush_Layout);
} else {
PostReflowEvent();
}
}
return NS_OK;
}
void
PresShell::DidDoReflow()
{
HandlePostedDOMEvents();
HandlePostedAttributeChanges();
HandlePostedReflowCallbacks();
// Null-check mViewManager in case this happens during Destroy. See
// bugs 244435 and 238546.
if (!mPaintingSuppressed && mViewManager)
mViewManager->SynthesizeMouseMove(PR_FALSE);
}
nsresult
PresShell::ProcessReflowCommands(PRBool aInterruptible)
{
MOZ_TIMER_DEBUGLOG(("Start: Reflow: PresShell::ProcessReflowCommands(), this=%p\n", this));
MOZ_TIMER_START(mReflowWatch);
if (0 != mReflowCommands.Count()) {
nsHTMLReflowMetrics desiredSize(nsnull);
nsCOMPtr<nsIRenderingContext> rcx;
nsIFrame* rootFrame = FrameManager()->GetRootFrame();
nsSize maxSize = rootFrame->GetSize();
nsresult rv=CreateRenderingContext(rootFrame, getter_AddRefs(rcx));
if (NS_FAILED(rv)) return rv;
#ifdef DEBUG
if (GetVerifyReflowEnable()) {
if (VERIFY_REFLOW_ALL & gVerifyReflowFlags) {
printf("ProcessReflowCommands: begin incremental reflow\n");
}
}
if (VERIFY_REFLOW_DUMP_COMMANDS & gVerifyReflowFlags) {
PRInt32 i, n = mReflowCommands.Count();
printf("\nPresShell::ProcessReflowCommands: this=%p, count=%d\n", (void*)this, n);
for (i = 0; i < n; i++) {
nsHTMLReflowCommand* rc = (nsHTMLReflowCommand*)
mReflowCommands.ElementAt(i);
rc->List(stdout);
}
}
#endif
// If reflow is interruptible, then make a note of our deadline.
const PRIntervalTime deadline = aInterruptible
? PR_IntervalNow() + PR_MicrosecondsToInterval(gMaxRCProcessingTime)
: (PRIntervalTime)0;
// force flushing of any pending notifications
mDocument->BeginUpdate(UPDATE_ALL);
mDocument->EndUpdate(UPDATE_ALL);
// That might have executed (via XBL binding constructors). So we
// may no longer have reflow commands. In fact, we may have
// gotten destroyed.
if (!mIsDestroying && mReflowCommands.Count() != 0) {
mIsReflowing = PR_TRUE;
do {
// Coalesce the reflow commands into a tree.
IncrementalReflow reflow;
for (PRInt32 i = mReflowCommands.Count() - 1; i >= 0; --i) {
nsHTMLReflowCommand *command =
NS_STATIC_CAST(nsHTMLReflowCommand *, mReflowCommands[i]);
IncrementalReflow::AddCommandResult res =
reflow.AddCommand(mPresContext, command);
if (res == IncrementalReflow::eEnqueued ||
res == IncrementalReflow::eCancel) {
// Remove the command from the queue.
mReflowCommands.RemoveElementAt(i);
ReflowCommandRemoved(command);
if (res == IncrementalReflow::eCancel)
delete command;
}
else {
// The reflow command couldn't be added to the tree; leave
// it in the queue, and we'll handle it next time.
#ifdef DEBUG
printf("WARNING: Couldn't add reflow command, so splitting.\n");
#endif
}
}
#ifdef DEBUG
if (VERIFY_REFLOW_NOISY_RC & gVerifyReflowFlags) {
printf("Incremental reflow tree:\n");
reflow.Dump(mPresContext);
}
#endif
// Dispatch an incremental reflow.
reflow.Dispatch(mPresContext, desiredSize, maxSize, *rcx);
// Keep going until we're out of reflow commands, or we've run
// past our deadline.
} while (mReflowCommands.Count() &&
(!aInterruptible || PR_IntervalNow() < deadline));
// XXXwaterson for interruptible reflow, examine the tree and
// re-enqueue any unflowed reflow targets.
mIsReflowing = PR_FALSE;
}
// If any new reflow commands were enqueued during the reflow,
// schedule another reflow event to process them.
if (mReflowCommands.Count())
PostReflowEvent();
#ifdef DEBUG
if (VERIFY_REFLOW_DUMP_COMMANDS & gVerifyReflowFlags) {
printf("\nPresShell::ProcessReflowCommands() finished: this=%p\n", (void*)this);
}
if (nsIFrameDebug::GetVerifyTreeEnable()) {
nsIFrameDebug* frameDebug;
if (NS_SUCCEEDED(rootFrame->QueryInterface(NS_GET_IID(nsIFrameDebug),
(void**)&frameDebug))) {
frameDebug->VerifyTree();
}
}
if (GetVerifyReflowEnable()) {
// First synchronously render what we have so far so that we can
// see it.
nsIView* rootView;
mViewManager->GetRootView(rootView);
mViewManager->UpdateView(rootView, NS_VMREFRESH_IMMEDIATE);
mInVerifyReflow = PR_TRUE;
PRBool ok = VerifyIncrementalReflow();
mInVerifyReflow = PR_FALSE;
if (VERIFY_REFLOW_ALL & gVerifyReflowFlags) {
printf("ProcessReflowCommands: finished (%s)\n",
ok ? "ok" : "failed");
}
if (0 != mReflowCommands.Count()) {
printf("XXX yikes! reflow commands queued during verify-reflow\n");
}
}
#endif
// If there are no more reflow commands in the queue, we'll want
// to remove the ``dummy request''.
DoneRemovingReflowCommands();
DidDoReflow();
}
MOZ_TIMER_DEBUGLOG(("Stop: Reflow: PresShell::ProcessReflowCommands(), this=%p\n", this));
MOZ_TIMER_STOP(mReflowWatch);
if (mShouldUnsuppressPainting && mReflowCommands.Count() == 0) {
// We only unlock if we're out of reflows. It's pointless
// to unlock if reflows are still pending, since reflows
// are just going to thrash the frames around some more. By
// waiting we avoid an overeager "jitter" effect.
mShouldUnsuppressPainting = PR_FALSE;
UnsuppressAndInvalidate();
}
return NS_OK;
}
nsresult
PresShell::ClearReflowEventStatus()
{
mReflowEventQueue = nsnull;
return NS_OK;
}
nsresult
PresShell::ReflowCommandAdded(nsHTMLReflowCommand* aRC)
{
if (gAsyncReflowDuringDocLoad) {
NS_PRECONDITION(mRCCreatedDuringLoad >= 0, "PresShell's reflow command queue is in a bad state.");
if (mDocumentLoading) {
aRC->AddFlagBits(NS_RC_CREATED_DURING_DOCUMENT_LOAD);
mRCCreatedDuringLoad++;
#ifdef PR_LOGGING
if (PR_LOG_TEST(gLog, PR_LOG_DEBUG)) {
nsIFrame* target;
aRC->GetTarget(target);
nsIAtom* type = target->GetType();
NS_ASSERTION(type, "frame didn't override GetType()");
nsAutoString typeStr(NS_LITERAL_STRING("unknown"));
if (type)
type->ToString(typeStr);
PR_LOG(gLog, PR_LOG_DEBUG,
("presshell=%p, ReflowCommandAdded(%p) target=%p[%s] mRCCreatedDuringLoad=%d\n",
this, aRC, target, NS_ConvertUCS2toUTF8(typeStr).get(), mRCCreatedDuringLoad));
}
#endif
if (!mDummyLayoutRequest) {
AddDummyLayoutRequest();
}
}
}
return NS_OK;
}
nsresult
PresShell::ReflowCommandRemoved(nsHTMLReflowCommand* aRC)
{
NS_PRECONDITION(mReflowCommandTable.ops, "How did that happen?");
PL_DHashTableOperate(&mReflowCommandTable, aRC, PL_DHASH_REMOVE);
if (gAsyncReflowDuringDocLoad) {
NS_PRECONDITION(mRCCreatedDuringLoad >= 0, "PresShell's reflow command queue is in a bad state.");
if (aRC->GetFlagBits() & NS_RC_CREATED_DURING_DOCUMENT_LOAD) {
mRCCreatedDuringLoad--;
PR_LOG(gLog, PR_LOG_DEBUG,
("presshell=%p, ReflowCommandRemoved(%p) mRCCreatedDuringLoad=%d\n",
this, aRC, mRCCreatedDuringLoad));
}
}
return NS_OK;
}
struct DummyLayoutRequestEvent : public PLEvent {
DummyLayoutRequestEvent(PresShell* aPresShell) NS_HIDDEN;
~DummyLayoutRequestEvent() { }
void HandleEvent() {
// Hold a ref here, just in case, since we can trigger DOM event dispatch
nsRefPtr<PresShell> presShell = NS_STATIC_CAST(PresShell*, owner);
presShell->mDummyLayoutRequestEventPosted = PR_FALSE;
presShell->RemoveDummyLayoutRequest();
}
};
PR_STATIC_CALLBACK(void*)
HandleDummyLayoutRequestPLEvent(PLEvent* aEvent)
{
DummyLayoutRequestEvent* evt = NS_STATIC_CAST(DummyLayoutRequestEvent*,
aEvent);
evt->HandleEvent();
return nsnull;
}
PR_STATIC_CALLBACK(void)
DestroyDummyLayoutRequestPLEvent(PLEvent* aEvent)
{
DummyLayoutRequestEvent* evt = NS_STATIC_CAST(DummyLayoutRequestEvent*,
aEvent);
delete evt;
}
DummyLayoutRequestEvent::DummyLayoutRequestEvent(PresShell* aPresShell)
{
NS_PRECONDITION(aPresShell, "Must have a presshell");
NS_PRECONDITION(aPresShell->mDummyLayoutRequest, "No layout request?");
PL_InitEvent(this, aPresShell, ::HandleDummyLayoutRequestPLEvent,
::DestroyDummyLayoutRequestPLEvent);
}
void
PresShell::DoneRemovingReflowCommands()
{
if (mRCCreatedDuringLoad == 0 && mDummyLayoutRequest && !mIsReflowing &&
!mIsDestroying && !mDummyLayoutRequestEventPosted) {
// Post an event to remove mDummyLayoutRequest from the loadgroup
nsCOMPtr<nsIEventQueue> eventQueue;
mEventQueueService->
GetSpecialEventQueue(nsIEventQueueService::UI_THREAD_EVENT_QUEUE,
getter_AddRefs(eventQueue));
if (!eventQueue) {
NS_WARNING("onload won't fire, due to failure to get event queue.");
return;
}
DummyLayoutRequestEvent* evt = new DummyLayoutRequestEvent(this);
if (!evt) {
NS_WARNING("onload won't fire, due to failure to create event.");
return;
}
nsresult rv = eventQueue->PostEvent(evt);
if (NS_FAILED(rv)) {
NS_WARNING("onload won't fire, due to failure to post dummy layout "
"request event");
PL_DestroyEvent(evt);
return;
}
mDummyLayoutRequestEventPosted = PR_TRUE;
}
}
nsresult
PresShell::AddDummyLayoutRequest(void)
{
nsresult rv = NS_OK;
if (gAsyncReflowDuringDocLoad && !mIsReflowing) {
rv = nsDummyLayoutRequest::Create(getter_AddRefs(mDummyLayoutRequest), this);
if (NS_FAILED(rv)) return rv;
nsCOMPtr<nsILoadGroup> loadGroup;
if (mDocument)
loadGroup = mDocument->GetDocumentLoadGroup();
if (loadGroup) {
rv = mDummyLayoutRequest->SetLoadGroup(loadGroup);
if (NS_FAILED(rv)) return rv;
rv = loadGroup->AddRequest(mDummyLayoutRequest, nsnull);
if (NS_FAILED(rv)) return rv;
PR_LOG(gLog, PR_LOG_ALWAYS,
("presshell=%p, Added dummy layout request %p", this, mDummyLayoutRequest.get()));
}
}
return rv;
}
nsresult
PresShell::RemoveDummyLayoutRequest()
{
nsresult rv = NS_OK;
if (gAsyncReflowDuringDocLoad) {
nsCOMPtr<nsILoadGroup> loadGroup;
if (mDocument)
loadGroup = mDocument->GetDocumentLoadGroup();
if (loadGroup && mDummyLayoutRequest) {
rv = loadGroup->RemoveRequest(mDummyLayoutRequest, nsnull, NS_OK);
NS_ENSURE_SUCCESS(rv, rv);
PR_LOG(gLog, PR_LOG_ALWAYS,
("presshell=%p, Removed dummy layout request %p", this,
mDummyLayoutRequest.get()));
mDummyLayoutRequest = nsnull;
}
}
return rv;
}
#ifdef MOZ_XUL
/*
* It's better to add stuff to the |DidSetStyleContext| method of the
* relevant frames than adding it here. These methods should (ideally,
* anyway) go away.
*/
// Return value says whether to walk children.
typedef PRBool (* PR_CALLBACK frameWalkerFn)(nsIFrame *aFrame, void *aClosure);
PR_STATIC_CALLBACK(PRBool)
ReResolveMenusAndTrees(nsIFrame *aFrame, void *aClosure)
{
// Trees have a special style cache that needs to be flushed when
// the theme changes.
nsCOMPtr<nsITreeBoxObject> treeBox(do_QueryInterface(aFrame));
if (treeBox)
treeBox->ClearStyleAndImageCaches();
// We deliberately don't re-resolve style on a menu's popup
// sub-content, since doing so slows menus to a crawl. That means we
// have to special-case them on a skin switch, and ensure that the
// popup frames just get destroyed completely.
nsCOMPtr<nsIMenuFrame> menuFrame(do_QueryInterface(aFrame));
if (menuFrame) {
menuFrame->UngenerateMenu();
menuFrame->OpenMenu(PR_FALSE);
}
return PR_TRUE;
}
PR_STATIC_CALLBACK(PRBool)
ReframeImageBoxes(nsIFrame *aFrame, void *aClosure)
{
nsStyleChangeList *list = NS_STATIC_CAST(nsStyleChangeList*, aClosure);
if (aFrame->GetType() == nsLayoutAtoms::imageBoxFrame) {
list->AppendChange(aFrame, aFrame->GetContent(),
NS_STYLE_HINT_FRAMECHANGE);
return PR_FALSE; // don't walk descendants
}
return PR_TRUE; // walk descendants
}
static void
WalkFramesThroughPlaceholders(nsPresContext *aPresContext, nsIFrame *aFrame,
frameWalkerFn aFunc, void *aClosure)
{
PRBool walkChildren = (*aFunc)(aFrame, aClosure);
if (!walkChildren)
return;
PRInt32 listIndex = 0;
nsIAtom* childList = nsnull;
do {
nsIFrame *child = aFrame->GetFirstChild(childList);
while (child) {
if (!(child->GetStateBits() & NS_FRAME_OUT_OF_FLOW)) {
// only do frames that are in flow, and recur through the
// out-of-flows of placeholders.
WalkFramesThroughPlaceholders(aPresContext,
nsPlaceholderFrame::GetRealFrameFor(child),
aFunc, aClosure);
}
child = child->GetNextSibling();
}
childList = aFrame->GetAdditionalChildListName(listIndex++);
} while (childList);
}
#endif
NS_IMETHODIMP
PresShell::Observe(nsISupports* aSubject,
const char* aTopic,
const PRUnichar* aData)
{
#ifdef MOZ_XUL
if (!nsCRT::strcmp(aTopic, "chrome-flush-skin-caches")) {
nsIFrame *rootFrame = FrameManager()->GetRootFrame();
// Need to null-check because "chrome-flush-skin-caches" can happen
// at interesting times during startup.
if (rootFrame) {
NS_ASSERTION(mViewManager, "View manager must exist");
mViewManager->BeginUpdateViewBatch();
WalkFramesThroughPlaceholders(mPresContext, rootFrame,
&ReResolveMenusAndTrees, nsnull);
// Because "chrome:" URL equality is messy, reframe image box
// frames (hack!).
nsStyleChangeList changeList;
WalkFramesThroughPlaceholders(mPresContext, rootFrame,
ReframeImageBoxes, &changeList);
mFrameConstructor->ProcessRestyledFrames(changeList);
mViewManager->EndUpdateViewBatch(NS_VMREFRESH_NO_SYNC);
#ifdef ACCESSIBILITY
InvalidateAccessibleSubtree(nsnull);
#endif
}
return NS_OK;
}
#endif
if (!nsCRT::strcmp(aTopic, NS_LINK_VISITED_EVENT_TOPIC)) {
nsCOMPtr<nsIURI> uri = do_QueryInterface(aSubject);
if (uri && mDocument) {
mDocument->NotifyURIVisitednessChanged(uri);
}
return NS_OK;
}
NS_WARNING("unrecognized topic in PresShell::Observe");
return NS_ERROR_FAILURE;
}
void
PresShell::EnumeratePlugins(nsIDOMDocument *aDocument,
const nsString &aPluginTag,
nsPluginEnumCallback aCallback)
{
nsCOMPtr<nsIDOMNodeList> nodes;
aDocument->GetElementsByTagName(aPluginTag, getter_AddRefs(nodes));
if (!nodes)
return;
PRUint32 length;
nodes->GetLength(&length);
for (PRUint32 i = 0; i < length; ++i) {
nsCOMPtr<nsIDOMNode> node;
nodes->Item(i, getter_AddRefs(node));
nsCOMPtr<nsIContent> content = do_QueryInterface(node);
if (content)
aCallback(this, content);
}
}
void
PresShell::HideViewIfPopup(nsIView* aView)
{
nsIFrame* frame = NS_STATIC_CAST(nsIFrame*, aView->GetClientData());
if (frame) {
nsIMenuParent* parent;
CallQueryInterface(frame, &parent);
if (parent) {
parent->HideChain();
// really make sure the view is hidden
mViewManager->SetViewVisibility(aView, nsViewVisibility_kHide);
}
}
nsIView* child = aView->GetFirstChild();
while (child) {
HideViewIfPopup(child);
child = child->GetNextSibling();
}
}
//------------------------------------------------------
// End of protected and private methods on the PresShell
//------------------------------------------------------
// Start of DEBUG only code
#ifdef NS_DEBUG
#include "nsViewsCID.h"
#include "nsWidgetsCID.h"
#include "nsIDeviceContext.h"
#include "nsIURL.h"
#include "nsILinkHandler.h"
static NS_DEFINE_CID(kViewManagerCID, NS_VIEW_MANAGER_CID);
static NS_DEFINE_CID(kWidgetCID, NS_CHILD_CID);
static void
LogVerifyMessage(nsIFrame* k1, nsIFrame* k2, const char* aMsg)
{
printf("verifyreflow: ");
nsAutoString name;
if (nsnull != k1) {
nsIFrameDebug* frameDebug;
if (NS_SUCCEEDED(k1->QueryInterface(NS_GET_IID(nsIFrameDebug),
(void**)&frameDebug))) {
frameDebug->GetFrameName(name);
}
}
else {
name.Assign(NS_LITERAL_STRING("(null)"));
}
fputs(NS_LossyConvertUCS2toASCII(name).get(), stdout);
printf(" != ");
if (nsnull != k2) {
nsIFrameDebug* frameDebug;
if (NS_SUCCEEDED(k2->QueryInterface(NS_GET_IID(nsIFrameDebug),
(void**)&frameDebug))) {
frameDebug->GetFrameName(name);
}
}
else {
name.Assign(NS_LITERAL_STRING("(null)"));
}
fputs(NS_LossyConvertUCS2toASCII(name).get(), stdout);
printf(" %s", aMsg);
}
static void
LogVerifyMessage(nsIFrame* k1, nsIFrame* k2, const char* aMsg,
const nsRect& r1, const nsRect& r2)
{
printf("VerifyReflow Error:\n");
nsAutoString name;
nsIFrameDebug* frameDebug;
if (NS_SUCCEEDED(k1->QueryInterface(NS_GET_IID(nsIFrameDebug),
(void**)&frameDebug))) {
fprintf(stdout, " ");
frameDebug->GetFrameName(name);
fputs(NS_LossyConvertUCS2toASCII(name).get(), stdout);
fprintf(stdout, " %p ", (void*)k1);
}
printf("{%d, %d, %d, %d}", r1.x, r1.y, r1.width, r1.height);
printf(" != \n");
if (NS_SUCCEEDED(k2->QueryInterface(NS_GET_IID(nsIFrameDebug),
(void**)&frameDebug))) {
fprintf(stdout, " ");
frameDebug->GetFrameName(name);
fputs(NS_LossyConvertUCS2toASCII(name).get(), stdout);
fprintf(stdout, " %p ", (void*)k2);
}
printf("{%d, %d, %d, %d}\n", r2.x, r2.y, r2.width, r2.height);
printf(" %s\n", aMsg);
}
static PRBool
CompareTrees(nsPresContext* aFirstPresContext, nsIFrame* aFirstFrame,
nsPresContext* aSecondPresContext, nsIFrame* aSecondFrame)
{
if (!aFirstPresContext || !aFirstFrame || !aSecondPresContext || !aSecondFrame)
return PR_TRUE;
PRBool ok = PR_TRUE;
nsIAtom* listName = nsnull;
PRInt32 listIndex = 0;
do {
nsIFrame* k1 = aFirstFrame->GetFirstChild(listName);
nsIFrame* k2 = aSecondFrame->GetFirstChild(listName);
PRInt32 l1 = nsContainerFrame::LengthOf(k1);
PRInt32 l2 = nsContainerFrame::LengthOf(k2);
if (l1 != l2) {
ok = PR_FALSE;
LogVerifyMessage(k1, k2, "child counts don't match: ");
printf("%d != %d\n", l1, l2);
if (0 == (VERIFY_REFLOW_ALL & gVerifyReflowFlags)) {
break;
}
}
nsRect r1, r2;
nsIView* v1, *v2;
for (;;) {
if (((nsnull == k1) && (nsnull != k2)) ||
((nsnull != k1) && (nsnull == k2))) {
ok = PR_FALSE;
LogVerifyMessage(k1, k2, "child lists are different\n");
break;
}
else if (nsnull != k1) {
// Verify that the frames are the same size
if (k1->GetRect() != k2->GetRect()) {
ok = PR_FALSE;
LogVerifyMessage(k1, k2, "(frame rects)", k1->GetRect(), k2->GetRect());
}
// Make sure either both have views or neither have views; if they
// do have views, make sure the views are the same size. If the
// views have widgets, make sure they both do or neither does. If
// they do, make sure the widgets are the same size.
v1 = k1->GetView();
v2 = k2->GetView();
if (((nsnull == v1) && (nsnull != v2)) ||
((nsnull != v1) && (nsnull == v2))) {
ok = PR_FALSE;
LogVerifyMessage(k1, k2, "child views are not matched\n");
}
else if (nsnull != v1) {
if (v1->GetBounds() != v2->GetBounds()) {
LogVerifyMessage(k1, k2, "(view rects)", v1->GetBounds(), v2->GetBounds());
}
nsIWidget* w1 = v1->GetWidget();
nsIWidget* w2 = v2->GetWidget();
if (((nsnull == w1) && (nsnull != w2)) ||
((nsnull != w1) && (nsnull == w2))) {
ok = PR_FALSE;
LogVerifyMessage(k1, k2, "child widgets are not matched\n");
}
else if (nsnull != w1) {
w1->GetBounds(r1);
w2->GetBounds(r2);
if (r1 != r2) {
LogVerifyMessage(k1, k2, "(widget rects)", r1, r2);
}
}
}
if (!ok && (0 == (VERIFY_REFLOW_ALL & gVerifyReflowFlags))) {
break;
}
// verify that neither frame has a space manager,
// or they both do and the space managers are equivalent
nsSpaceManager *sm1 = NS_STATIC_CAST(nsSpaceManager*,
k1->GetProperty(nsLayoutAtoms::spaceManagerProperty));
// look at the test frame
nsSpaceManager *sm2 = NS_STATIC_CAST(nsSpaceManager*,
k2->GetProperty(nsLayoutAtoms::spaceManagerProperty));
// now compare the space managers
if (((nsnull == sm1) && (nsnull != sm2)) ||
((nsnull != sm1) && (nsnull == sm2))) { // one is null, and the other is not
ok = PR_FALSE;
LogVerifyMessage(k1, k2, "space managers are not matched\n");
}
else if (sm1 && sm2) { // both are not null, compare them
// first, compare yMost
nscoord yMost1, yMost2;
nsresult smresult = sm1->YMost(yMost1);
if (NS_ERROR_ABORT != smresult)
{
NS_ASSERTION(NS_SUCCEEDED(smresult), "bad result");
smresult = sm2->YMost(yMost2);
NS_ASSERTION(NS_SUCCEEDED(smresult), "bad result");
if (yMost1 != yMost2) {
LogVerifyMessage(k1, k2, "yMost of space managers differs\n");
}
// now compare bands by sampling
PRInt32 yIncrement = yMost1/100;
if (0==yIncrement) {
yIncrement = 1; // guarantee we make progress in the loop below
}
nscoord yOffset = 0;
for ( ; ok && yOffset < yMost1; yOffset += yIncrement)
{
nscoord small=5, large=100;
nsBandData band1, band2;
nsBandTrapezoid trap1[20], trap2[20];
band1.mSize = band2.mSize = 20;
band1.mTrapezoids = trap1;
band2.mTrapezoids = trap2;
sm1->GetBandData(yOffset, nsSize(small,small), band1);
sm2->GetBandData(yOffset, nsSize(small,small), band2);
if (band1.mCount != band2.mCount)
{ // count mismatch, stop comparing
LogVerifyMessage(k1, k2, "band.mCount of space managers differs\n");
printf("count1= %d, count2=%d, yOffset = %d, size=%d\n",
band1.mCount, band2.mCount, yOffset, small);
ok = PR_FALSE;
}
else // band counts match, compare individual traps
{
PRInt32 trapIndex=0;
for ( ;trapIndex<band1.mCount; trapIndex++)
{
PRBool match = (trap1[trapIndex].EqualGeometry(trap2[trapIndex])) &&
trap1[trapIndex].mState == trap2[trapIndex].mState;
if (!match)
{
LogVerifyMessage(k1, k2, "band.mTrapezoids of space managers differs\n");
printf ("index %d\n", trapIndex);
}
}
}
// test the larger maxSize
sm1->GetBandData(yOffset, nsSize(large,large), band1);
sm2->GetBandData(yOffset, nsSize(large,large), band2);
if (band1.mCount != band2.mCount)
{ // count mismatch, stop comparing
LogVerifyMessage(k1, k2, "band.mCount of space managers differs\n");
printf("count1= %d, count2=%d, yOffset = %d, size=%d\n",
band1.mCount, band2.mCount, yOffset, small);
ok = PR_FALSE;
}
else // band counts match, compare individual traps
{
PRInt32 trapIndex=0;
for ( ; trapIndex<band1.mCount; trapIndex++)
{
PRBool match = (trap1[trapIndex].EqualGeometry(trap2[trapIndex])) &&
trap1[trapIndex].mState == trap2[trapIndex].mState;
if (!match)
{
LogVerifyMessage(k1, k2, "band.mTrapezoids of space managers differs\n");
printf ("index %d\n", trapIndex);
}
}
}
}
}
}
// Compare the sub-trees too
if (!CompareTrees(aFirstPresContext, k1, aSecondPresContext, k2)) {
ok = PR_FALSE;
if (0 == (VERIFY_REFLOW_ALL & gVerifyReflowFlags)) {
break;
}
}
// Advance to next sibling
k1 = k1->GetNextSibling();
k2 = k2->GetNextSibling();
}
else {
break;
}
}
if (!ok && (0 == (VERIFY_REFLOW_ALL & gVerifyReflowFlags))) {
break;
}
nsIAtom* listName1 = aFirstFrame->GetAdditionalChildListName(listIndex);
nsIAtom* listName2 = aSecondFrame->GetAdditionalChildListName(listIndex);
listIndex++;
if (listName1 != listName2) {
if (0 == (VERIFY_REFLOW_ALL & gVerifyReflowFlags)) {
ok = PR_FALSE;
}
LogVerifyMessage(k1, k2, "child list names are not matched: ");
nsAutoString tmp;
if (nsnull != listName1) {
listName1->ToString(tmp);
fputs(NS_LossyConvertUCS2toASCII(tmp).get(), stdout);
}
else
fputs("(null)", stdout);
printf(" != ");
if (nsnull != listName2) {
listName2->ToString(tmp);
fputs(NS_LossyConvertUCS2toASCII(tmp).get(), stdout);
}
else
fputs("(null)", stdout);
printf("\n");
break;
}
listName = listName1;
} while (ok && (listName != nsnull));
return ok;
}
#endif
#if 0
static nsIFrame*
FindTopFrame(nsIFrame* aRoot)
{
if (aRoot) {
nsIContent* content = aRoot->GetContent();
if (content) {
nsIAtom* tag;
content->GetTag(tag);
if (nsnull != tag) {
NS_RELEASE(tag);
return aRoot;
}
}
// Try one of the children
nsIFrame* kid = aRoot->GetFirstChild(nsnull);
while (nsnull != kid) {
nsIFrame* result = FindTopFrame(kid);
if (nsnull != result) {
return result;
}
kid = kid->GetNextSibling();
}
}
return nsnull;
}
#endif
#ifdef DEBUG
nsresult
PresShell::CloneStyleSet(nsStyleSet* aSet, nsStyleSet** aResult)
{
nsStyleSet *clone = new nsStyleSet();
if (!clone) {
return NS_ERROR_OUT_OF_MEMORY;
}
PRInt32 i, n = aSet->SheetCount(nsStyleSet::eOverrideSheet);
for (i = 0; i < n; i++) {
nsIStyleSheet* ss = aSet->StyleSheetAt(nsStyleSet::eOverrideSheet, i);
if (ss)
clone->AppendStyleSheet(nsStyleSet::eOverrideSheet, ss);
}
n = aSet->SheetCount(nsStyleSet::eDocSheet);
for (i = 0; i < n; i++) {
nsIStyleSheet* ss = aSet->StyleSheetAt(nsStyleSet::eDocSheet, i);
if (ss)
clone->AddDocStyleSheet(ss, mDocument);
}
n = aSet->SheetCount(nsStyleSet::eUserSheet);
for (i = 0; i < n; i++) {
nsIStyleSheet* ss = aSet->StyleSheetAt(nsStyleSet::eUserSheet, i);
if (ss)
clone->AppendStyleSheet(nsStyleSet::eUserSheet, ss);
}
n = aSet->SheetCount(nsStyleSet::eAgentSheet);
for (i = 0; i < n; i++) {
nsIStyleSheet* ss = aSet->StyleSheetAt(nsStyleSet::eAgentSheet, i);
if (ss)
clone->AppendStyleSheet(nsStyleSet::eAgentSheet, ss);
}
*aResult = clone;
return NS_OK;
}
// After an incremental reflow, we verify the correctness by doing a
// full reflow into a fresh frame tree.
PRBool
PresShell::VerifyIncrementalReflow()
{
if (VERIFY_REFLOW_NOISY & gVerifyReflowFlags) {
printf("Building Verification Tree...\n");
}
// All the stuff we are creating that needs releasing
nsPresContext* cx;
nsIViewManager* vm;
nsIPresShell* sh;
// Create a presentation context to view the new frame tree
NS_IF_ADDREF(cx = new nsPresContext(mPresContext->IsPaginated() ?
nsPresContext::eContext_PrintPreview :
nsPresContext::eContext_Galley));
if (!cx)
return NS_ERROR_OUT_OF_MEMORY;
nsCOMPtr<nsISupports> container = mPresContext->GetContainer();
if (container) {
cx->SetContainer(container);
nsCOMPtr<nsILinkHandler> lh = do_QueryInterface(container);
if (lh) {
cx->SetLinkHandler(lh);
}
}
nsIDeviceContext *dc = mPresContext->DeviceContext();
nsresult rv = cx->Init(dc);
NS_ENSURE_SUCCESS(rv, rv);
// Get our scrolling preference
nsIView* rootView;
mViewManager->GetRootView(rootView);
void* nativeParentWidget = rootView->GetWidget()->GetNativeData(NS_NATIVE_WIDGET);
// Create a new view manager.
rv = CallCreateInstance(kViewManagerCID, &vm);
NS_ASSERTION(NS_SUCCEEDED (rv), "failed to create view manager");
rv = vm->Init(dc);
NS_ASSERTION(NS_SUCCEEDED (rv), "failed to init view manager");
// Create a child window of the parent that is our "root view/window"
// Create a view
nsRect tbounds = mPresContext->GetVisibleArea();
nsIView* view = vm->CreateView(tbounds, nsnull);
NS_ASSERTION(view, "failed to create view");
if (!view)
return PR_FALSE;
//now create the widget for the view
rv = view->CreateWidget(kWidgetCID, nsnull, nativeParentWidget, PR_TRUE);
NS_ASSERTION(NS_SUCCEEDED(rv), "failed to create scroll view widget");
// Setup hierarchical relationship in view manager
vm->SetRootView(view);
// Make the new presentation context the same size as our
// presentation context.
nsRect r = mPresContext->GetVisibleArea();
cx->SetVisibleArea(r);
// Create a new presentation shell to view the document. Use the
// exact same style information that this document has.
nsAutoPtr<nsStyleSet> newSet;
rv = CloneStyleSet(mStyleSet, getter_Transfers(newSet));
NS_ASSERTION(NS_SUCCEEDED(rv), "failed to clone style set");
rv = mDocument->CreateShell(cx, vm, newSet, &sh);
sh->SetVerifyReflowEnable(PR_FALSE); // turn off verify reflow while we're reflowing the test frame tree
NS_ASSERTION(NS_SUCCEEDED (rv), "failed to create presentation shell");
vm->SetViewObserver((nsIViewObserver *)((PresShell*)sh));
sh->InitialReflow(r.width, r.height);
sh->SetVerifyReflowEnable(PR_TRUE); // turn on verify reflow again now that we're done reflowing the test frame tree
if (VERIFY_REFLOW_NOISY & gVerifyReflowFlags) {
printf("Verification Tree built, comparing...\n");
}
// Now that the document has been reflowed, use its frame tree to
// compare against our frame tree.
nsIFrame* root1 = FrameManager()->GetRootFrame();
nsIFrame* root2 = sh->FrameManager()->GetRootFrame();
PRBool ok = CompareTrees(mPresContext, root1, cx, root2);
if (!ok && (VERIFY_REFLOW_NOISY & gVerifyReflowFlags)) {
printf("Verify reflow failed, primary tree:\n");
nsIFrameDebug* frameDebug;
if (NS_SUCCEEDED(root1->QueryInterface(NS_GET_IID(nsIFrameDebug),
(void**)&frameDebug))) {
frameDebug->List(mPresContext, stdout, 0);
}
printf("Verification tree:\n");
if (NS_SUCCEEDED(root2->QueryInterface(NS_GET_IID(nsIFrameDebug),
(void**)&frameDebug))) {
frameDebug->List(mPresContext, stdout, 0);
}
}
cx->SetContainer(nsnull);
NS_RELEASE(cx);
sh->EndObservingDocument();
NS_RELEASE(sh);
NS_RELEASE(vm);
if (VERIFY_REFLOW_NOISY & gVerifyReflowFlags) {
printf("Finished Verifying Reflow...\n");
}
return ok;
}
// Layout debugging hooks
void
PresShell::ListStyleContexts(nsIFrame *aRootFrame, FILE *out, PRInt32 aIndent)
{
nsStyleContext *sc = aRootFrame->GetStyleContext();
if (sc)
sc->List(out, aIndent);
}
void
PresShell::ListStyleSheets(FILE *out, PRInt32 aIndent)
{
PRInt32 sheetCount = mStyleSet->SheetCount(nsStyleSet::eDocSheet);
for (PRInt32 i = 0; i < sheetCount; ++i) {
mStyleSet->StyleSheetAt(nsStyleSet::eDocSheet, i)->List(out, aIndent);
fputs("\n", out);
}
}
#endif
// PresShellViewEventListener
NS_IMPL_ISUPPORTS2(PresShellViewEventListener, nsIScrollPositionListener, nsICompositeListener)
PresShellViewEventListener::PresShellViewEventListener()
{
mPresShell = 0;
mWasVisible = PR_FALSE;
mCallCount = 0;
}
PresShellViewEventListener::~PresShellViewEventListener()
{
mPresShell = 0;
}
nsresult
PresShellViewEventListener::SetPresShell(nsIPresShell *aPresShell)
{
mPresShell = aPresShell;
return NS_OK;
}
nsresult
PresShellViewEventListener::HideCaret()
{
nsresult result = NS_OK;
if (mPresShell && 0 == mCallCount)
{
nsCOMPtr<nsISelectionController> selCon = do_QueryInterface(mPresShell);
if (selCon)
{
result = selCon->GetCaretEnabled(&mWasVisible);
if (NS_SUCCEEDED(result) && mWasVisible)
result = selCon->SetCaretEnabled(PR_FALSE);
}
}
++mCallCount;
return result;
}
nsresult
PresShellViewEventListener::RestoreCaretVisibility()
{
nsresult result = NS_OK;
--mCallCount;
if (mPresShell && 0 == mCallCount && mWasVisible)
{
nsCOMPtr<nsISelectionController> selCon = do_QueryInterface(mPresShell);
if (selCon)
result = selCon->SetCaretEnabled(PR_TRUE);
}
return result;
}
NS_IMETHODIMP
PresShellViewEventListener::ScrollPositionWillChange(nsIScrollableView *aView, nscoord aX, nscoord aY)
{
return HideCaret();
}
NS_IMETHODIMP
PresShellViewEventListener::ScrollPositionDidChange(nsIScrollableView *aView, nscoord aX, nscoord aY)
{
return RestoreCaretVisibility();
}
NS_IMETHODIMP
PresShellViewEventListener::WillRefreshRegion(nsIViewManager *aViewManager,
nsIView *aView,
nsIRenderingContext *aContext,
nsIRegion *aRegion,
PRUint32 aUpdateFlags)
{
return HideCaret();
}
NS_IMETHODIMP
PresShellViewEventListener::DidRefreshRegion(nsIViewManager *aViewManager,
nsIView *aView,
nsIRenderingContext *aContext,
nsIRegion *aRegion,
PRUint32 aUpdateFlags)
{
nsCSSRendering::DidPaint();
return RestoreCaretVisibility();
}
NS_IMETHODIMP
PresShellViewEventListener::WillRefreshRect(nsIViewManager *aViewManager,
nsIView *aView,
nsIRenderingContext *aContext,
const nsRect *aRect,
PRUint32 aUpdateFlags)
{
return HideCaret();
}
NS_IMETHODIMP
PresShellViewEventListener::DidRefreshRect(nsIViewManager *aViewManager,
nsIView *aView,
nsIRenderingContext *aContext,
const nsRect *aRect,
PRUint32 aUpdateFlags)
{
nsCSSRendering::DidPaint();
return RestoreCaretVisibility();
}
//=============================================================
//=============================================================
//-- Debug Reflow Counts
//=============================================================
//=============================================================
#ifdef MOZ_REFLOW_PERF
//-------------------------------------------------------------
NS_IMETHODIMP
PresShell::DumpReflows()
{
if (mReflowCountMgr) {
nsCAutoString uriStr;
if (mDocument) {
nsIURI *uri = mDocument->GetDocumentURI();
if (uri) {
uri->GetPath(uriStr);
}
}
mReflowCountMgr->DisplayTotals(uriStr.get());
mReflowCountMgr->DisplayHTMLTotals(uriStr.get());
mReflowCountMgr->DisplayDiffsInTotals("Differences");
}
return NS_OK;
}
//-------------------------------------------------------------
NS_IMETHODIMP
PresShell::CountReflows(const char * aName, PRUint32 aType, nsIFrame * aFrame)
{
if (mReflowCountMgr) {
mReflowCountMgr->Add(aName, (nsReflowReason)aType, aFrame);
}
return NS_OK;
}
//-------------------------------------------------------------
NS_IMETHODIMP
PresShell::PaintCount(const char * aName, nsIRenderingContext* aRenderingContext, nsPresContext* aPresContext, nsIFrame * aFrame, PRUint32 aColor)
{
if (mReflowCountMgr) {
mReflowCountMgr->PaintCount(aName, aRenderingContext, aPresContext, aFrame, aColor);
}
return NS_OK;
}
//-------------------------------------------------------------
NS_IMETHODIMP
PresShell::SetPaintFrameCount(PRBool aPaintFrameCounts)
{
if (mReflowCountMgr) {
mReflowCountMgr->SetPaintFrameCounts(aPaintFrameCounts);
}
return NS_OK;
}
//------------------------------------------------------------------
//-- Reflow Counter Classes Impls
//------------------------------------------------------------------
//------------------------------------------------------------------
ReflowCounter::ReflowCounter(ReflowCountMgr * aMgr) :
mMgr(aMgr)
{
ClearTotals();
SetTotalsCache();
}
//------------------------------------------------------------------
ReflowCounter::~ReflowCounter()
{
}
//------------------------------------------------------------------
void ReflowCounter::ClearTotals()
{
for (PRUint32 i=0;i<NUM_REFLOW_TYPES;i++) {
mTotals[i] = 0;
}
}
//------------------------------------------------------------------
void ReflowCounter::SetTotalsCache()
{
for (PRUint32 i=0;i<NUM_REFLOW_TYPES;i++) {
mCacheTotals[i] = mTotals[i];
}
}
//------------------------------------------------------------------
void ReflowCounter::CalcDiffInTotals()
{
for (PRUint32 i=0;i<NUM_REFLOW_TYPES;i++) {
mCacheTotals[i] = mTotals[i] - mCacheTotals[i];
}
}
//------------------------------------------------------------------
void ReflowCounter::DisplayTotals(const char * aStr)
{
DisplayTotals(mTotals, aStr?aStr:"Totals");
}
//------------------------------------------------------------------
void ReflowCounter::DisplayDiffTotals(const char * aStr)
{
DisplayTotals(mCacheTotals, aStr?aStr:"Diff Totals");
}
//------------------------------------------------------------------
void ReflowCounter::DisplayHTMLTotals(const char * aStr)
{
DisplayHTMLTotals(mTotals, aStr?aStr:"Totals");
}
//------------------------------------------------------------------
void ReflowCounter::DisplayTotals(PRUint32 * aArray, const char * aTitle)
{
// figure total
PRUint32 total = 0;
PRUint32 i;
for (i=0;i<NUM_REFLOW_TYPES;i++) {
total += aArray[i];
}
if (total == 0) {
return;
}
ReflowCounter * gTots = (ReflowCounter *)mMgr->LookUp(kGrandTotalsStr);
printf("%25s\t", aTitle);
for (i=0;i<NUM_REFLOW_TYPES;i++) {
printf("%d\t", aArray[i]);
if (gTots != this && aArray[i] > 0) {
gTots->Add((nsReflowReason)i, aArray[i]);
}
}
printf("%d\n", total);
}
//------------------------------------------------------------------
void ReflowCounter::DisplayHTMLTotals(PRUint32 * aArray, const char * aTitle)
{
// figure total
PRUint32 total = 0;
PRUint32 i;
for (i=0;i<NUM_REFLOW_TYPES;i++) {
total += aArray[i];
}
if (total == 0) {
return;
}
ReflowCounter * gTots = (ReflowCounter *)mMgr->LookUp(kGrandTotalsStr);
FILE * fd = mMgr->GetOutFile();
if (!fd) {
return;
}
fprintf(fd, "<tr><td><center>%s</center></td>", aTitle);
for (i=0;i<NUM_REFLOW_TYPES;i++) {
fprintf(fd, "<td><center>");
if (aArray[i]) {
fprintf(fd, "%d", aArray[i]);
} else {
fprintf(fd, "&nbsp;");
}
fprintf(fd, "</center></td>");
if (gTots != this && aArray[i] > 0) {
gTots->Add((nsReflowReason)i, aArray[i]);
}
}
fprintf(fd, "<td><center>%d</center></td></tr>\n", total);
}
//------------------------------------------------------------------
//-- ReflowCountMgr
//------------------------------------------------------------------
ReflowCountMgr::ReflowCountMgr()
{
mCounts = PL_NewHashTable(10, PL_HashString, PL_CompareStrings,
PL_CompareValues, nsnull, nsnull);
mIndiFrameCounts = PL_NewHashTable(10, PL_HashString, PL_CompareStrings,
PL_CompareValues, nsnull, nsnull);
mCycledOnce = PR_FALSE;
mDumpFrameCounts = PR_FALSE;
mDumpFrameByFrameCounts = PR_FALSE;
mPaintFrameByFrameCounts = PR_FALSE;
}
//------------------------------------------------------------------
ReflowCountMgr::~ReflowCountMgr()
{
CleanUp();
}
//------------------------------------------------------------------
ReflowCounter * ReflowCountMgr::LookUp(const char * aName)
{
if (nsnull != mCounts) {
ReflowCounter * counter = (ReflowCounter *)PL_HashTableLookup(mCounts, aName);
return counter;
}
return nsnull;
}
//------------------------------------------------------------------
void ReflowCountMgr::Add(const char * aName, nsReflowReason aType, nsIFrame * aFrame)
{
NS_ASSERTION(aName != nsnull, "Name shouldn't be null!");
if (mDumpFrameCounts && nsnull != mCounts) {
ReflowCounter * counter = (ReflowCounter *)PL_HashTableLookup(mCounts, aName);
if (counter == nsnull) {
counter = new ReflowCounter(this);
NS_ASSERTION(counter != nsnull, "null ptr");
char * name = nsCRT::strdup(aName);
NS_ASSERTION(name != nsnull, "null ptr");
PL_HashTableAdd(mCounts, name, counter);
}
counter->Add(aType);
}
if ((mDumpFrameByFrameCounts || mPaintFrameByFrameCounts) &&
nsnull != mIndiFrameCounts &&
aFrame != nsnull) {
char * key = new char[16];
sprintf(key, "%p", (void*)aFrame);
IndiReflowCounter * counter = (IndiReflowCounter *)PL_HashTableLookup(mIndiFrameCounts, key);
if (counter == nsnull) {
counter = new IndiReflowCounter(this);
NS_ASSERTION(counter != nsnull, "null ptr");
counter->mFrame = aFrame;
counter->mName.AssignASCII(aName);
PL_HashTableAdd(mIndiFrameCounts, key, counter);
}
// this eliminates extra counts from super classes
if (counter != nsnull && counter->mName.EqualsASCII(aName)) {
counter->mCount++;
counter->mCounter.Add(aType, 1);
}
}
}
//------------------------------------------------------------------
void ReflowCountMgr::PaintCount(const char * aName,
nsIRenderingContext* aRenderingContext,
nsPresContext* aPresContext,
nsIFrame* aFrame,
PRUint32 aColor)
{
if (mPaintFrameByFrameCounts &&
nsnull != mIndiFrameCounts &&
aFrame != nsnull) {
char * key = new char[16];
sprintf(key, "%p", (void*)aFrame);
IndiReflowCounter * counter = (IndiReflowCounter *)PL_HashTableLookup(mIndiFrameCounts, key);
if (counter != nsnull && counter->mName.EqualsASCII(aName)) {
aRenderingContext->PushState();
nsFont font("Times", NS_FONT_STYLE_NORMAL,NS_FONT_VARIANT_NORMAL,
NS_FONT_WEIGHT_NORMAL,0,NSIntPointsToTwips(8));
nsCOMPtr<nsIFontMetrics> fm = aPresContext->GetMetricsFor(font);
aRenderingContext->SetFont(fm);
char buf[16];
sprintf(buf, "%d", counter->mCount);
nscoord x = 0, y;
nscoord width, height;
aRenderingContext->GetWidth((char*)buf, width);
fm->GetHeight(height);
fm->GetMaxAscent(y);
PRUint32 color;
PRUint32 color2;
if (aColor != 0) {
color = aColor;
color2 = NS_RGB(0,0,0);
} else {
PRUint8 rc = 0, gc = 0, bc = 0;
if (counter->mCount < 5) {
rc = 255;
gc = 255;
} else if ( counter->mCount < 11) {
gc = 255;
} else {
rc = 255;
}
color = NS_RGB(rc,gc,bc);
color2 = NS_RGB(rc/2,gc/2,bc/2);
}
nsRect rect(0,0, width+15, height+15);
aRenderingContext->SetColor(NS_RGB(0,0,0));
aRenderingContext->FillRect(rect);
aRenderingContext->SetColor(color2);
aRenderingContext->DrawString(buf, strlen(buf), x+15,y+15);
aRenderingContext->SetColor(color);
aRenderingContext->DrawString(buf, strlen(buf), x,y);
aRenderingContext->PopState();
}
}
}
//------------------------------------------------------------------
PRIntn ReflowCountMgr::RemoveItems(PLHashEntry *he, PRIntn i, void *arg)
{
char *str = (char *)he->key;
ReflowCounter * counter = (ReflowCounter *)he->value;
delete counter;
delete [] str;
return HT_ENUMERATE_REMOVE;
}
//------------------------------------------------------------------
PRIntn ReflowCountMgr::RemoveIndiItems(PLHashEntry *he, PRIntn i, void *arg)
{
char *str = (char *)he->key;
IndiReflowCounter * counter = (IndiReflowCounter *)he->value;
delete counter;
delete [] str;
return HT_ENUMERATE_REMOVE;
}
//------------------------------------------------------------------
void ReflowCountMgr::CleanUp()
{
if (nsnull != mCounts) {
PL_HashTableEnumerateEntries(mCounts, RemoveItems, nsnull);
PL_HashTableDestroy(mCounts);
mCounts = nsnull;
}
if (nsnull != mIndiFrameCounts) {
PL_HashTableEnumerateEntries(mIndiFrameCounts, RemoveIndiItems, nsnull);
PL_HashTableDestroy(mIndiFrameCounts);
mIndiFrameCounts = nsnull;
}
}
//------------------------------------------------------------------
PRIntn ReflowCountMgr::DoSingleTotal(PLHashEntry *he, PRIntn i, void *arg)
{
char *str = (char *)he->key;
ReflowCounter * counter = (ReflowCounter *)he->value;
counter->DisplayTotals(str);
return HT_ENUMERATE_NEXT;
}
//------------------------------------------------------------------
void ReflowCountMgr::DoGrandTotals()
{
if (nsnull != mCounts) {
ReflowCounter * gTots = (ReflowCounter *)PL_HashTableLookup(mCounts, kGrandTotalsStr);
if (gTots == nsnull) {
gTots = new ReflowCounter(this);
PL_HashTableAdd(mCounts, nsCRT::strdup(kGrandTotalsStr), gTots);
} else {
gTots->ClearTotals();
}
static const char * title[] = {"Init", "Incrm", "Resze", "Style", "Dirty", "Total"};
printf("\t\t\t");
PRUint32 i;
for (i=0;i<NUM_REFLOW_TYPES+1;i++) {
printf("\t%s", title[i]);
}
printf("\n");
for (i=0;i<78;i++) {
printf("-");
}
printf("\n");
PL_HashTableEnumerateEntries(mCounts, DoSingleTotal, this);
}
}
static void RecurseIndiTotals(nsPresContext* aPresContext,
PLHashTable * aHT,
nsIFrame * aParentFrame,
PRInt32 aLevel)
{
if (aParentFrame == nsnull) {
return;
}
char key[16];
sprintf(key, "%p", (void*)aParentFrame);
IndiReflowCounter * counter = (IndiReflowCounter *)PL_HashTableLookup(aHT, key);
if (counter) {
counter->mHasBeenOutput = PR_TRUE;
char * name = ToNewCString(counter->mName);
for (PRInt32 i=0;i<aLevel;i++) printf(" ");
printf("%s - %p [%d][", name, (void*)aParentFrame, counter->mCount);
for (PRInt32 inx=0;inx<5;inx++) {
if (inx != 0) printf(",");
printf("%d", counter->mCounter.GetTotalByType(nsReflowReason(inx)));
}
printf("]\n");
nsMemory::Free(name);
}
nsIFrame* child = aParentFrame->GetFirstChild(nsnull);
while (child) {
RecurseIndiTotals(aPresContext, aHT, child, aLevel+1);
child = child->GetNextSibling();
}
}
//------------------------------------------------------------------
PRIntn ReflowCountMgr::DoSingleIndi(PLHashEntry *he, PRIntn i, void *arg)
{
IndiReflowCounter * counter = (IndiReflowCounter *)he->value;
if (counter && !counter->mHasBeenOutput) {
char * name = ToNewCString(counter->mName);
printf("%s - %p [%d][", name, (void*)counter->mFrame, counter->mCount);
for (PRInt32 inx=0;inx<5;inx++) {
if (inx != 0) printf(",");
printf("%d", counter->mCounter.GetTotalByType(nsReflowReason(inx)));
}
printf("]\n");
nsMemory::Free(name);
}
return HT_ENUMERATE_NEXT;
}
//------------------------------------------------------------------
void ReflowCountMgr::DoIndiTotalsTree()
{
if (nsnull != mCounts) {
printf("\n------------------------------------------------\n");
printf("-- Individual Frame Counts\n");
printf("------------------------------------------------\n");
if (mPresShell) {
nsIFrame * rootFrame = mPresShell->FrameManager()->GetRootFrame();
RecurseIndiTotals(mPresContext, mIndiFrameCounts, rootFrame, 0);
printf("------------------------------------------------\n");
printf("-- Individual Counts of Frames not in Root Tree\n");
printf("------------------------------------------------\n");
PL_HashTableEnumerateEntries(mIndiFrameCounts, DoSingleIndi, this);
}
}
}
//------------------------------------------------------------------
PRIntn ReflowCountMgr::DoSingleHTMLTotal(PLHashEntry *he, PRIntn i, void *arg)
{
char *str = (char *)he->key;
ReflowCounter * counter = (ReflowCounter *)he->value;
counter->DisplayHTMLTotals(str);
return HT_ENUMERATE_NEXT;
}
//------------------------------------------------------------------
void ReflowCountMgr::DoGrandHTMLTotals()
{
if (nsnull != mCounts) {
ReflowCounter * gTots = (ReflowCounter *)PL_HashTableLookup(mCounts, kGrandTotalsStr);
if (gTots == nsnull) {
gTots = new ReflowCounter(this);
PL_HashTableAdd(mCounts, nsCRT::strdup(kGrandTotalsStr), gTots);
} else {
gTots->ClearTotals();
}
static const char * title[] = {"Class", "Init", "Incrm", "Resze", "Style", "Dirty", "Total"};
fprintf(mFD, "<tr>");
PRUint32 i;
for (i=0;i<NUM_REFLOW_TYPES+2;i++) {
fprintf(mFD, "<td><center><b>%s<b></center></td>", title[i]);
}
fprintf(mFD, "</tr>\n");
PL_HashTableEnumerateEntries(mCounts, DoSingleHTMLTotal, this);
}
}
//------------------------------------
void ReflowCountMgr::DisplayTotals(const char * aStr)
{
#ifdef DEBUG_rods
printf("%s\n", aStr?aStr:"No name");
#endif
if (mDumpFrameCounts) {
DoGrandTotals();
}
if (mDumpFrameByFrameCounts) {
DoIndiTotalsTree();
}
}
//------------------------------------
void ReflowCountMgr::DisplayHTMLTotals(const char * aStr)
{
#ifdef WIN32x // XXX NOT XP!
char name[1024];
char * sptr = strrchr(aStr, '/');
if (sptr) {
sptr++;
strcpy(name, sptr);
char * eptr = strrchr(name, '.');
if (eptr) {
*eptr = 0;
}
strcat(name, "_stats.html");
}
mFD = fopen(name, "w");
if (mFD) {
fprintf(mFD, "<html><head><title>Reflow Stats</title></head><body>\n");
const char * title = aStr?aStr:"No name";
fprintf(mFD, "<center><b>%s</b><br><table border=1 style=\"background-color:#e0e0e0\">", title);
DoGrandHTMLTotals();
fprintf(mFD, "</center></table>\n");
fprintf(mFD, "</body></html>\n");
fclose(mFD);
mFD = nsnull;
}
#endif // not XP!
}
//------------------------------------------------------------------
PRIntn ReflowCountMgr::DoClearTotals(PLHashEntry *he, PRIntn i, void *arg)
{
ReflowCounter * counter = (ReflowCounter *)he->value;
counter->ClearTotals();
return HT_ENUMERATE_NEXT;
}
//------------------------------------------------------------------
void ReflowCountMgr::ClearTotals()
{
PL_HashTableEnumerateEntries(mCounts, DoClearTotals, this);
}
//------------------------------------------------------------------
void ReflowCountMgr::ClearGrandTotals()
{
if (nsnull != mCounts) {
ReflowCounter * gTots = (ReflowCounter *)PL_HashTableLookup(mCounts, kGrandTotalsStr);
if (gTots == nsnull) {
gTots = new ReflowCounter(this);
PL_HashTableAdd(mCounts, nsCRT::strdup(kGrandTotalsStr), gTots);
} else {
gTots->ClearTotals();
gTots->SetTotalsCache();
}
}
}
//------------------------------------------------------------------
PRIntn ReflowCountMgr::DoDisplayDiffTotals(PLHashEntry *he, PRIntn i, void *arg)
{
PRBool cycledOnce = (arg != 0);
char *str = (char *)he->key;
ReflowCounter * counter = (ReflowCounter *)he->value;
if (cycledOnce) {
counter->CalcDiffInTotals();
counter->DisplayDiffTotals(str);
}
counter->SetTotalsCache();
return HT_ENUMERATE_NEXT;
}
//------------------------------------------------------------------
void ReflowCountMgr::DisplayDiffsInTotals(const char * aStr)
{
if (mCycledOnce) {
printf("Differences\n");
for (PRInt32 i=0;i<78;i++) {
printf("-");
}
printf("\n");
ClearGrandTotals();
}
PL_HashTableEnumerateEntries(mCounts, DoDisplayDiffTotals, (void *)mCycledOnce);
mCycledOnce = PR_TRUE;
}
#endif // MOZ_REFLOW_PERF
// make a color string like #RRGGBB
void ColorToString(nscolor aColor, nsAutoString &aString)
{
char buf[8];
PR_snprintf(buf, sizeof(buf), "#%02x%02x%02x",
NS_GET_R(aColor), NS_GET_G(aColor), NS_GET_B(aColor));
CopyASCIItoUTF16(buf, aString);
}
PRBool
nsPresContext::IsChrome()
{
PRBool isChrome = PR_FALSE;
nsCOMPtr<nsISupports> container = GetContainer();
if (container) {
nsresult result;
nsCOMPtr<nsIDocShellTreeItem> docShell(do_QueryInterface(container, &result));
if (NS_SUCCEEDED(result) && docShell) {
PRInt32 docShellType;
result = docShell->GetItemType(&docShellType);
if (NS_SUCCEEDED(result)) {
isChrome = nsIDocShellTreeItem::typeChrome == docShellType;
}
}
}
return isChrome;
}
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