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RetroZilla/layout/generic/nsTextFrame.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):
* Robert O'Callahan <roc+moz@cs.cmu.edu>
* Roger B. Sidje <rbs@maths.uq.edu.au>
* Pierre Phaneuf <pp@ludusdesign.com>
* Prabhat Hegde <prabhat.hegde@sun.com>
* Tomi Leppikangas <tomi.leppikangas@oulu.fi>
* Roland Mainz <roland.mainz@informatik.med.uni-giessen.de>
* Daniel Glazman <glazman@netscape.com>
* Neil Deakin <neil@mozdevgroup.com>
* Masayuki Nakano <masayuki@d-toybox.com>
*
* 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 ***** */
#include "nsCOMPtr.h"
#include "nsHTMLParts.h"
#include "nsCRT.h"
#include "nsSplittableFrame.h"
#include "nsLineLayout.h"
#include "nsString.h"
#include "nsUnicharUtils.h"
#include "nsPresContext.h"
#include "nsIContent.h"
#include "nsStyleConsts.h"
#include "nsStyleContext.h"
#include "nsCoord.h"
#include "nsIFontMetrics.h"
#include "nsIRenderingContext.h"
#include "nsIPresShell.h"
#include "nsIView.h"
#include "nsIViewManager.h"
#include "nsITimer.h"
#include "prtime.h"
#include "nsVoidArray.h"
#include "prprf.h"
#include "nsIDOMText.h"
#include "nsIDocument.h"
#include "nsIDeviceContext.h"
#include "nsICaret.h"
#include "nsCSSPseudoElements.h"
#include "nsILineBreaker.h"
#include "nsIWordBreaker.h"
#include "nsCompatibility.h"
#include "nsCSSColorUtils.h"
#include "nsITextContent.h"
#include "nsTextFragment.h"
#include "nsTextTransformer.h"
#include "nsHTMLAtoms.h"
#include "nsLayoutAtoms.h"
#include "nsIFrameSelection.h"
#include "nsISelection.h"
#include "nsIDOMRange.h"
#include "nsILookAndFeel.h"
#include "nsCSSRendering.h"
#include "nsContentUtils.h"
#include "nsILineIterator.h"
#include "nsCompressedCharMap.h"
#include "nsIServiceManager.h"
#ifdef ACCESSIBILITY
#include "nsIAccessible.h"
#include "nsIAccessibilityService.h"
#endif
#include "nsGUIEvent.h"
#include "nsAutoPtr.h"
#include "nsStyleSet.h"
#include "nsBidiFrames.h"
#include "nsBidiPresUtils.h"
#include "nsBidiUtils.h"
#ifdef SUNCTL
#include "nsILE.h"
static NS_DEFINE_CID(kLECID, NS_ULE_CID);
#endif /* SUNCTL */
#ifdef NS_DEBUG
#undef NOISY_BLINK
#undef DEBUG_WORD_WRAPPING
#undef NOISY_REFLOW
#undef NOISY_TRIM
#else
#undef NOISY_BLINK
#undef DEBUG_WORD_WRAPPING
#undef NOISY_REFLOW
#undef NOISY_TRIM
#endif
// #define DEBUGWORDJUMP
#define kSZLIG 0x00DF
//----------------------------------------------------------------------
#define TEXT_BUF_SIZE 100
//----------------------------------------
// checks to see if the text can be lightened..
// text is darkend
inline PRBool CanDarken(nsPresContext* aPresContext)
{
PRBool darken;
if (aPresContext->GetBackgroundColorDraw()) {
darken = PR_FALSE;
} else {
if (aPresContext->GetBackgroundImageDraw()) {
darken = PR_FALSE;
} else {
darken = PR_TRUE;
}
}
return darken;
}
struct nsAutoIndexBuffer {
nsAutoIndexBuffer();
~nsAutoIndexBuffer();
nsresult GrowTo(PRInt32 aAtLeast);
PRInt32* mBuffer;
PRInt32 mBufferLen;
PRInt32 mAutoBuffer[TEXT_BUF_SIZE];
};
nsAutoIndexBuffer::nsAutoIndexBuffer()
: mBuffer(mAutoBuffer),
mBufferLen(TEXT_BUF_SIZE)
{
#ifdef DEBUG
memset(mAutoBuffer, 0xdd, sizeof(mAutoBuffer));
#endif
}
nsAutoIndexBuffer::~nsAutoIndexBuffer()
{
if (mBuffer && (mBuffer != mAutoBuffer)) {
delete [] mBuffer;
}
}
nsresult
nsAutoIndexBuffer::GrowTo(PRInt32 aAtLeast)
{
if (aAtLeast > mBufferLen)
{
PRInt32 newSize = mBufferLen * 2;
if (newSize < mBufferLen + aAtLeast) {
newSize = mBufferLen * 2 + aAtLeast;
}
PRInt32* newBuffer = new PRInt32[newSize];
if (!newBuffer) {
return NS_ERROR_OUT_OF_MEMORY;
}
#ifdef DEBUG
memset(newBuffer, 0xdd, sizeof(PRInt32) * newSize);
#endif
memcpy(newBuffer, mBuffer, sizeof(PRInt32) * mBufferLen);
if (mBuffer != mAutoBuffer) {
delete [] mBuffer;
}
mBuffer = newBuffer;
mBufferLen = newSize;
}
return NS_OK;
}
struct nsAutoPRUint8Buffer {
nsAutoPRUint8Buffer();
~nsAutoPRUint8Buffer();
nsresult GrowTo(PRInt32 aAtLeast);
PRUint8* mBuffer;
PRInt32 mBufferLen;
PRUint8 mAutoBuffer[TEXT_BUF_SIZE];
};
nsAutoPRUint8Buffer::nsAutoPRUint8Buffer()
: mBuffer(mAutoBuffer),
mBufferLen(TEXT_BUF_SIZE)
{
#ifdef DEBUG
memset(mAutoBuffer, 0xdd, sizeof(mAutoBuffer));
#endif
}
nsAutoPRUint8Buffer::~nsAutoPRUint8Buffer()
{
if (mBuffer && (mBuffer != mAutoBuffer)) {
delete [] mBuffer;
}
}
nsresult
nsAutoPRUint8Buffer::GrowTo(PRInt32 aAtLeast)
{
if (aAtLeast > mBufferLen)
{
PRInt32 newSize = mBufferLen * 2;
if (newSize < mBufferLen + aAtLeast) {
newSize = mBufferLen * 2 + aAtLeast;
}
PRUint8* newBuffer = new PRUint8[newSize];
if (!newBuffer) {
return NS_ERROR_OUT_OF_MEMORY;
}
#ifdef DEBUG
memset(newBuffer, 0xdd, sizeof(PRUint8) * newSize);
#endif
memcpy(newBuffer, mBuffer, sizeof(PRUint8) * mBufferLen);
if (mBuffer != mAutoBuffer) {
delete [] mBuffer;
}
mBuffer = newBuffer;
mBufferLen = newSize;
}
return NS_OK;
}
//----------------------------------------------------------------------
// Helper class for managing blinking text
class nsBlinkTimer : public nsITimerCallback
{
public:
nsBlinkTimer();
virtual ~nsBlinkTimer();
NS_DECL_ISUPPORTS
void AddFrame(nsPresContext* aPresContext, nsIFrame* aFrame);
PRBool RemoveFrame(nsIFrame* aFrame);
PRInt32 FrameCount();
void Start();
void Stop();
NS_DECL_NSITIMERCALLBACK
static nsresult AddBlinkFrame(nsPresContext* aPresContext, nsIFrame* aFrame);
static nsresult RemoveBlinkFrame(nsIFrame* aFrame);
static PRBool GetBlinkIsOff() { return sState == 3; }
protected:
struct FrameData {
nsPresContext* mPresContext; // pres context associated with the frame
nsIFrame* mFrame;
FrameData(nsPresContext* aPresContext,
nsIFrame* aFrame)
: mPresContext(aPresContext), mFrame(aFrame) {}
};
nsCOMPtr<nsITimer> mTimer;
nsVoidArray mFrames;
nsPresContext* mPresContext;
protected:
static nsBlinkTimer* sTextBlinker;
static PRUint32 sState; // 0-2 == on; 3 == off
};
nsBlinkTimer* nsBlinkTimer::sTextBlinker = nsnull;
PRUint32 nsBlinkTimer::sState = 0;
#ifdef NOISY_BLINK
static PRTime gLastTick;
#endif
nsBlinkTimer::nsBlinkTimer()
{
}
nsBlinkTimer::~nsBlinkTimer()
{
Stop();
sTextBlinker = nsnull;
}
void nsBlinkTimer::Start()
{
nsresult rv;
mTimer = do_CreateInstance("@mozilla.org/timer;1", &rv);
if (NS_OK == rv) {
mTimer->InitWithCallback(this, 250, nsITimer::TYPE_REPEATING_PRECISE);
}
}
void nsBlinkTimer::Stop()
{
if (nsnull != mTimer) {
mTimer->Cancel();
}
}
NS_IMPL_ISUPPORTS1(nsBlinkTimer, nsITimerCallback)
void nsBlinkTimer::AddFrame(nsPresContext* aPresContext, nsIFrame* aFrame) {
FrameData* frameData = new FrameData(aPresContext, aFrame);
mFrames.AppendElement(frameData);
if (1 == mFrames.Count()) {
Start();
}
}
PRBool nsBlinkTimer::RemoveFrame(nsIFrame* aFrame) {
PRInt32 i, n = mFrames.Count();
PRBool rv = PR_FALSE;
for (i = 0; i < n; i++) {
FrameData* frameData = (FrameData*) mFrames.ElementAt(i);
if (frameData->mFrame == aFrame) {
rv = mFrames.RemoveElementAt(i);
delete frameData;
break;
}
}
if (0 == mFrames.Count()) {
Stop();
}
return rv;
}
PRInt32 nsBlinkTimer::FrameCount() {
return mFrames.Count();
}
NS_IMETHODIMP nsBlinkTimer::Notify(nsITimer *timer)
{
// Toggle blink state bit so that text code knows whether or not to
// render. All text code shares the same flag so that they all blink
// in unison.
sState = (sState + 1) % 4;
if (sState == 1 || sState == 2)
// States 0, 1, and 2 are all the same.
return NS_OK;
#ifdef NOISY_BLINK
PRTime now = PR_Now();
char buf[50];
PRTime delta;
LL_SUB(delta, now, gLastTick);
gLastTick = now;
PR_snprintf(buf, sizeof(buf), "%lldusec", delta);
printf("%s\n", buf);
#endif
PRInt32 i, n = mFrames.Count();
for (i = 0; i < n; i++) {
FrameData* frameData = (FrameData*) mFrames.ElementAt(i);
// Determine damaged area and tell view manager to redraw it
// blink doesn't blink outline ... I hope
nsRect bounds(nsPoint(0, 0), frameData->mFrame->GetSize());
frameData->mFrame->Invalidate(bounds, PR_FALSE);
}
return NS_OK;
}
// static
nsresult nsBlinkTimer::AddBlinkFrame(nsPresContext* aPresContext, nsIFrame* aFrame)
{
if (!sTextBlinker)
{
sTextBlinker = new nsBlinkTimer;
if (!sTextBlinker) return NS_ERROR_OUT_OF_MEMORY;
}
NS_ADDREF(sTextBlinker);
sTextBlinker->AddFrame(aPresContext, aFrame);
return NS_OK;
}
// static
nsresult nsBlinkTimer::RemoveBlinkFrame(nsIFrame* aFrame)
{
NS_ASSERTION(sTextBlinker, "Should have blink timer here");
nsBlinkTimer* blinkTimer = sTextBlinker; // copy so we can call NS_RELEASE on it
if (!blinkTimer) return NS_OK;
blinkTimer->RemoveFrame(aFrame);
NS_RELEASE(blinkTimer);
return NS_OK;
}
//----------------------------------------------------------------------
class nsTextFrame : public nsFrame {
public:
nsTextFrame();
// nsIFrame
NS_IMETHOD Paint(nsPresContext* aPresContext,
nsIRenderingContext& aRenderingContext,
const nsRect& aDirtyRect,
nsFramePaintLayer aWhichLayer,
PRUint32 aFlags);
NS_IMETHOD Destroy(nsPresContext* aPresContext);
NS_IMETHOD GetCursor(const nsPoint& aPoint,
nsIFrame::Cursor& aCursor);
NS_IMETHOD CharacterDataChanged(nsPresContext* aPresContext,
nsIContent* aChild,
PRBool aAppend);
virtual nsIFrame* GetNextInFlow() const {
return mNextInFlow;
}
NS_IMETHOD SetNextInFlow(nsIFrame* aNextInFlow) {
mNextInFlow = aNextInFlow;
return NS_OK;
}
virtual nsIFrame* GetLastInFlow() const;
NS_IMETHOD IsSplittable(nsSplittableType& aIsSplittable) const {
aIsSplittable = NS_FRAME_SPLITTABLE;
return NS_OK;
}
/**
* Get the "type" of the frame
*
* @see nsLayoutAtoms::textFrame
*/
virtual nsIAtom* GetType() const;
#ifdef DEBUG
NS_IMETHOD List(nsPresContext* aPresContext, FILE* out, PRInt32 aIndent) const;
NS_IMETHOD GetFrameName(nsAString& aResult) const;
NS_IMETHOD_(nsFrameState) GetDebugStateBits() const ;
#endif
NS_IMETHOD GetPosition(nsPresContext* aPresContext,
const nsPoint& aPoint,
nsIContent ** aNewContent,
PRInt32& aContentOffset,
PRInt32& aContentOffsetEnd);
NS_IMETHOD GetContentAndOffsetsFromPoint(nsPresContext* aPresContext,
const nsPoint& aPoint,
nsIContent ** aNewContent,
PRInt32& aContentOffset,
PRInt32& aContentOffsetEnd,
PRBool& aBeginFrameContent);
NS_IMETHOD GetPositionSlowly(nsPresContext* aPresContext,
nsIRenderingContext * aRendContext,
const nsPoint& aPoint,
nsIContent ** aNewContent,
PRInt32& aOffset);
NS_IMETHOD SetSelected(nsPresContext* aPresContext,
nsIDOMRange *aRange,
PRBool aSelected,
nsSpread aSpread);
NS_IMETHOD PeekOffset(nsPresContext* aPresContext, nsPeekOffsetStruct *aPos);
NS_IMETHOD CheckVisibility(nsPresContext* aContext, PRInt32 aStartIndex, PRInt32 aEndIndex, PRBool aRecurse, PRBool *aFinished, PRBool *_retval);
NS_IMETHOD HandleMultiplePress(nsPresContext* aPresContext,
nsGUIEvent * aEvent,
nsEventStatus* aEventStatus);
NS_IMETHOD GetOffsets(PRInt32 &start, PRInt32 &end)const;
virtual void AdjustOffsetsForBidi(PRInt32 start, PRInt32 end);
NS_IMETHOD GetPointFromOffset(nsPresContext* inPresContext,
nsIRenderingContext* inRendContext,
PRInt32 inOffset,
nsPoint* outPoint);
NS_IMETHOD GetChildFrameContainingOffset(PRInt32 inContentOffset,
PRBool inHint,
PRInt32* outFrameContentOffset,
nsIFrame* *outChildFrame);
NS_IMETHOD IsVisibleForPainting(nsPresContext * aPresContext,
nsIRenderingContext& aRenderingContext,
PRBool aCheckVis,
PRBool* aIsVisible);
virtual PRBool IsEmpty();
virtual PRBool IsSelfEmpty() { return IsEmpty(); }
#ifdef ACCESSIBILITY
NS_IMETHOD GetAccessible(nsIAccessible** aAccessible);
#endif
// nsIHTMLReflow
NS_IMETHOD Reflow(nsPresContext* aPresContext,
nsHTMLReflowMetrics& aMetrics,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus);
NS_IMETHOD CanContinueTextRun(PRBool& aContinueTextRun) const;
NS_IMETHOD AdjustFrameSize(nscoord aExtraSpace, nscoord& aUsedSpace);
NS_IMETHOD TrimTrailingWhiteSpace(nsPresContext* aPresContext,
nsIRenderingContext& aRC,
nscoord& aDeltaWidth,
PRBool& aLastCharIsJustifiable);
struct TextStyle {
const nsStyleFont* mFont;
const nsStyleText* mText;
nsIFontMetrics* mNormalFont;
nsIFontMetrics* mSmallFont;
nsIFontMetrics* mLastFont;
PRBool mSmallCaps;
nscoord mWordSpacing;
nscoord mLetterSpacing;
nscoord mSpaceWidth;
nscoord mAveCharWidth;
PRBool mJustifying;
PRBool mPreformatted;
PRInt32 mNumJustifiableCharacterToRender;
PRInt32 mNumJustifiableCharacterToMeasure;
nscoord mExtraSpacePerJustifiableCharacter;
PRInt32 mNumJustifiableCharacterReceivingExtraJot;
TextStyle(nsPresContext* aPresContext,
nsIRenderingContext& aRenderingContext,
nsStyleContext* sc)
{
// Get style data
mFont = sc->GetStyleFont();
mText = sc->GetStyleText();
// Cache the original decorations and reuse the current font
// to query metrics, rather than creating a new font which is expensive.
nsFont* plainFont = (nsFont *)&mFont->mFont; //XXX: Change to use a CONST_CAST macro.
NS_ASSERTION(plainFont, "null plainFont: font problems in TextStyle::TextStyle");
PRUint8 originalDecorations = plainFont->decorations;
plainFont->decorations = NS_FONT_DECORATION_NONE;
mAveCharWidth = 0;
SetFontFromStyle(&aRenderingContext, sc); // some users of the struct expect this state
aRenderingContext.GetFontMetrics(mNormalFont);
mNormalFont->GetSpaceWidth(mSpaceWidth);
mNormalFont->GetAveCharWidth(mAveCharWidth);
mLastFont = mNormalFont;
// Get the small-caps font if needed
mSmallCaps = NS_STYLE_FONT_VARIANT_SMALL_CAPS == plainFont->variant;
if (mSmallCaps) {
nscoord originalSize = plainFont->size;
plainFont->size = nscoord(0.8 * plainFont->size);
mSmallFont = aPresContext->GetMetricsFor(*plainFont).get(); // addrefs
// Reset to the size value saved earlier.
plainFont->size = originalSize;
}
else {
mSmallFont = nsnull;
}
// Reset to the decoration saved earlier
plainFont->decorations = originalDecorations;
// Get the word and letter spacing
PRIntn unit = mText->mWordSpacing.GetUnit();
if (eStyleUnit_Coord == unit) {
mWordSpacing = mText->mWordSpacing.GetCoordValue();
} else {
mWordSpacing = 0;
}
unit = mText->mLetterSpacing.GetUnit();
if (eStyleUnit_Coord == unit) {
mLetterSpacing = mText->mLetterSpacing.GetCoordValue();
} else {
mLetterSpacing = 0;
}
mNumJustifiableCharacterToRender = 0;
mNumJustifiableCharacterToMeasure = 0;
mNumJustifiableCharacterReceivingExtraJot = 0;
mExtraSpacePerJustifiableCharacter = 0;
mPreformatted = (NS_STYLE_WHITESPACE_PRE == mText->mWhiteSpace) ||
(NS_STYLE_WHITESPACE_MOZ_PRE_WRAP == mText->mWhiteSpace);
mJustifying = (NS_STYLE_TEXT_ALIGN_JUSTIFY == mText->mTextAlign) &&
!mPreformatted;
}
~TextStyle() {
NS_IF_RELEASE(mNormalFont);
NS_IF_RELEASE(mSmallFont);
}
};
// Contains extra style data needed only for painting (not reflowing)
struct TextPaintStyle : TextStyle {
const nsStyleColor* mColor;
nscolor mSelectionTextColor;
nscolor mSelectionBGColor;
TextPaintStyle(nsPresContext* aPresContext,
nsIRenderingContext& aRenderingContext,
nsStyleContext* sc)
: TextStyle(aPresContext, aRenderingContext, sc)
{
mColor = sc->GetStyleColor();
// Get colors from look&feel
mSelectionBGColor = NS_RGB(0, 0, 0);
mSelectionTextColor = NS_RGB(255, 255, 255);
nsILookAndFeel* look = aPresContext->LookAndFeel();
look->GetColor(nsILookAndFeel::eColor_TextSelectBackground,
mSelectionBGColor);
look->GetColor(nsILookAndFeel::eColor_TextSelectForeground,
mSelectionTextColor);
}
~TextPaintStyle() {
mColor = nsnull;
}
};
struct TextReflowData {
PRInt32 mX; // OUT
PRInt32 mOffset; // IN/OUT How far along we are in the content
nscoord mMaxWordWidth; // OUT
nscoord mAscent; // OUT
nscoord mDescent; // OUT
PRPackedBool mWrapping; // IN
PRPackedBool mSkipWhitespace; // IN
PRPackedBool mMeasureText; // IN
PRPackedBool mInWord; // IN
PRPackedBool mFirstLetterOK; // IN
PRPackedBool mCanBreakBefore; // IN
PRPackedBool mComputeMaxWordWidth; // IN
PRPackedBool mTrailingSpaceTrimmed; // IN/OUT
TextReflowData(PRInt32 aStartingOffset,
PRBool aWrapping,
PRBool aSkipWhitespace,
PRBool aMeasureText,
PRBool aInWord,
PRBool aFirstLetterOK,
PRBool aCanBreakBefore,
PRBool aComputeMaxWordWidth,
PRBool aTrailingSpaceTrimmed)
: mX(0),
mOffset(aStartingOffset),
mMaxWordWidth(0),
mAscent(0),
mDescent(0),
mWrapping(aWrapping),
mSkipWhitespace(aSkipWhitespace),
mMeasureText(aMeasureText),
mInWord(aInWord),
mFirstLetterOK(aFirstLetterOK),
mCanBreakBefore(aCanBreakBefore),
mComputeMaxWordWidth(aComputeMaxWordWidth),
mTrailingSpaceTrimmed(aTrailingSpaceTrimmed)
{}
};
nsIDocument* GetDocument(nsPresContext* aPresContext);
void PrepareUnicodeText(nsTextTransformer& aTransformer,
nsAutoIndexBuffer* aIndexBuffer,
nsAutoTextBuffer* aTextBuffer,
PRInt32* aTextLen,
PRBool aForceArabicShaping = PR_FALSE,
PRIntn* aJustifiableCharCount = nsnull);
void ComputeExtraJustificationSpacing(nsIRenderingContext& aRenderingContext,
TextStyle& aTextStyle,
PRUnichar* aBuffer, PRInt32 aLength, PRInt32 aNumJustifiableCharacter);
/**
* @param aRightToLeftText whether the rendering context is reversing text
* using its native right-to-left capability
*/
void PaintTextDecorations(nsIRenderingContext& aRenderingContext,
nsStyleContext* aStyleContext,
nsPresContext* aPresContext,
TextPaintStyle& aStyle,
nscoord aX, nscoord aY, nscoord aWidth,
PRBool aRightToLeftText,
PRUnichar* aText = nsnull,
SelectionDetails *aDetails = nsnull,
PRUint32 aIndex = 0,
PRUint32 aLength = 0,
const nscoord* aSpacing = nsnull);
void PaintTextSlowly(nsPresContext* aPresContext,
nsIRenderingContext& aRenderingContext,
nsStyleContext* aStyleContext,
TextPaintStyle& aStyle,
nscoord aX, nscoord aY);
// The passed-in rendering context must have its color set to the color the
// text should be rendered in.
/**
* @param aRightToLeftText whether the rendering context is reversing text
* using its native right-to-left capability
*/
void RenderString(nsIRenderingContext& aRenderingContext,
nsStyleContext* aStyleContext,
nsPresContext* aPresContext,
TextPaintStyle& aStyle,
PRBool aRightToLeftText,
PRUnichar* aBuffer, PRInt32 aLength, PRBool aIsEndOfFrame,
nscoord aX, nscoord aY,
nscoord aWidth,
SelectionDetails *aDetails = nsnull);
void MeasureSmallCapsText(const nsHTMLReflowState& aReflowState,
TextStyle& aStyle,
PRUnichar* aWord,
PRInt32 aWordLength,
PRBool aIsEndOfFrame,
nsTextDimensions* aDimensionsResult);
PRUint32 EstimateNumChars(PRUint32 aAvailableWidth,
PRUint32 aAverageCharWidth);
nsReflowStatus MeasureText(nsPresContext* aPresContext,
const nsHTMLReflowState& aReflowState,
nsTextTransformer& aTx,
nsILineBreaker* aLb,
TextStyle& aTs,
TextReflowData& aTextData);
void GetTextDimensions(nsIRenderingContext& aRenderingContext,
TextStyle& aStyle,
PRUnichar* aBuffer, PRInt32 aLength, PRBool aIsEndOfFrame,
nsTextDimensions* aDimensionsResult);
//this returns the index into the PAINTBUFFER of the x coord aWidth(based on 0 as far left)
//also note: this is NOT added to mContentOffset since that would imply that this return is
//meaningful to content yet. use index buffer from prepareunicodestring to find the content offset.
PRInt32 GetLengthSlowly(nsIRenderingContext& aRenderingContext,
TextStyle& aStyle,
PRUnichar* aBuffer, PRInt32 aLength, PRBool aIsEndOfFrame,
nscoord aWidth);
PRBool IsTextInSelection(nsPresContext* aPresContext,
nsIRenderingContext& aRenderingContext);
nsresult GetTextInfoForPainting(nsPresContext* aPresContext,
nsIRenderingContext& aRenderingContext,
nsIPresShell** aPresShell,
nsISelectionController** aSelectionController,
PRBool& aDisplayingSelection,
PRBool& aIsPaginated,
PRBool& aIsSelected,
PRBool& aHideStandardSelection,
PRInt16& aSelectionValue,
nsILineBreaker** aLineBreaker);
void PaintUnicodeText(nsPresContext* aPresContext,
nsIRenderingContext& aRenderingContext,
nsStyleContext* aStyleContext,
TextPaintStyle& aStyle,
nscoord dx, nscoord dy);
void PaintAsciiText(nsPresContext* aPresContext,
nsIRenderingContext& aRenderingContext,
nsStyleContext* aStyleContext,
TextPaintStyle& aStyle,
nscoord dx, nscoord dy);
/**
* ComputeTotalWordDimensions and ComputeWordFragmentDimensions work
* together to measure a text that spans multiple frames, e.g., as in
* "baseText<b>moreText<i>moreDeepText</i></b>moreAlsoHere"
* where the total text shoudn't be broken (or the joined pieces should be
* passed to the linebreaker for examination, especially in i18n cases).
*
* ComputeTotalWordDimensions will loop over ComputeWordFragmentDimensions
* to look-ahead and accumulate the joining fragments.
*
* @param aNextFrame is the first textFrame after the baseText's textFrame.
*
* @param aBaseDimensions is the dimension of baseText.
*
* @param aCanBreakBefore is false when it is not possible to break before
* the baseText (e.g., when this is the first word on the line).
*/
nsTextDimensions ComputeTotalWordDimensions(nsPresContext* aPresContext,
nsILineBreaker* aLineBreaker,
nsLineLayout& aLineLayout,
const nsHTMLReflowState& aReflowState,
nsIFrame* aNextFrame,
const nsTextDimensions& aBaseDimensions,
PRUnichar* aWordBuf,
PRUint32 aWordBufLen,
PRUint32 aWordBufSize,
PRBool aCanBreakBefore);
/**
* @param aNextFrame is the textFrame following the current fragment.
*
* @param aMoreSize plays a double role. The process should continue
* normally when it is zero. But when it returns -1, it means that there is
* no more fragment of interest and the look-ahead should be stopped. When
* it returns a positive value, it means that the current buffer (aWordBuf
* of size aWordBufSize) is not big enough to accumulate the current fragment.
* The returned positive value is the shortfall.
*
* @param aWordBufLen is the accumulated length of the fragments that have
* been accounted for so far.
*/
nsTextDimensions ComputeWordFragmentDimensions(nsPresContext* aPresContext,
nsILineBreaker* aLineBreaker,
nsLineLayout& aLineLayout,
const nsHTMLReflowState& aReflowState,
nsIFrame* aNextFrame,
nsIContent* aContent,
nsITextContent* aText,
PRInt32* aMoreSize,
const PRUnichar* aWordBuf,
PRUint32 &aWordBufLen,
PRUint32 aWordBufSize,
PRBool aCanBreakBefore);
#ifdef DEBUG
void ToCString(nsString& aBuf, PRInt32* aTotalContentLength) const;
#endif
protected:
virtual ~nsTextFrame();
nsIFrame* mNextInFlow;
PRInt32 mContentOffset;
PRInt32 mContentLength;
PRInt32 mColumn;
nscoord mAscent;
//factored out method for GetTextDimensions and getlengthslowly. if aGetTextDimensions is non-zero number then measure to the width field and return the length. else shove total dimensions into result
PRInt32 GetTextDimensionsOrLength(nsIRenderingContext& aRenderingContext,
TextStyle& aStyle,
PRUnichar* aBuffer, PRInt32 aLength, PRBool aIsEndOfFrame,
nsTextDimensions* aDimensionsResult,
PRBool aGetTextDimensions/* true=get dimensions false = return length up to aDimensionsResult->width size*/);
nsresult GetContentAndOffsetsForSelection(nsPresContext* aPresContext,nsIContent **aContent, PRInt32 *aOffset, PRInt32 *aLength);
void AdjustSelectionPointsForBidi(SelectionDetails *sdptr,
PRInt32 textLength,
PRBool isRTLChars,
PRBool isOddLevel,
PRBool isBidiSystem);
void SetOffsets(PRInt32 start, PRInt32 end);
PRBool IsChineseJapaneseLangGroup();
PRBool IsJustifiableCharacter(PRUnichar aChar, PRBool aLangIsCJ);
nsresult FillClusterBuffer(nsPresContext *aPresContext, const PRUnichar *aText,
PRUint32 aLength, nsAutoPRUint8Buffer& aClusterBuffer);
};
#ifdef ACCESSIBILITY
NS_IMETHODIMP nsTextFrame::GetAccessible(nsIAccessible** aAccessible)
{
if (mRect.width > 0 || mRect.height > 0 || GetNextInFlow()) {
nsCOMPtr<nsIAccessibilityService> accService = do_GetService("@mozilla.org/accessibilityService;1");
if (accService) {
return accService->CreateHTMLTextAccessible(NS_STATIC_CAST(nsIFrame*, this), aAccessible);
}
}
return NS_ERROR_FAILURE;
}
#endif
//-----------------------------------------------------------------------------
NS_IMETHODIMP
nsTextFrame::Destroy(nsPresContext* aPresContext)
{
if (mNextInFlow) {
mNextInFlow->SetPrevInFlow(nsnull);
}
// Let the base class destroy the frame
return nsFrame::Destroy(aPresContext);
}
class nsContinuingTextFrame : public nsTextFrame {
public:
NS_IMETHOD Init(nsPresContext* aPresContext,
nsIContent* aContent,
nsIFrame* aParent,
nsStyleContext* aContext,
nsIFrame* aPrevInFlow);
NS_IMETHOD Destroy(nsPresContext* aPresContext);
virtual nsIFrame* GetPrevInFlow() const {
return mPrevInFlow;
}
NS_IMETHOD SetPrevInFlow(nsIFrame* aPrevInFlow) {
mPrevInFlow = aPrevInFlow;
return NS_OK;
}
virtual nsIFrame* GetFirstInFlow() const;
protected:
nsIFrame* mPrevInFlow;
};
NS_IMETHODIMP
nsContinuingTextFrame::Init(nsPresContext* aPresContext,
nsIContent* aContent,
nsIFrame* aParent,
nsStyleContext* aContext,
nsIFrame* aPrevInFlow)
{
NS_PRECONDITION(aContent->IsContentOfType(nsIContent::eTEXT),
"Bogus content!");
nsresult rv;
rv = nsTextFrame::Init(aPresContext, aContent, aParent, aContext, aPrevInFlow);
if (aPrevInFlow) {
// Hook the frame into the flow
mPrevInFlow = aPrevInFlow;
aPrevInFlow->SetNextInFlow(this);
#ifdef IBMBIDI
if (aPrevInFlow->GetStateBits() & NS_FRAME_IS_BIDI) {
PRInt32 start, end;
aPrevInFlow->GetOffsets(start, mContentOffset);
nsPropertyTable *propTable = aPresContext->PropertyTable();
propTable->SetProperty(this, nsLayoutAtoms::embeddingLevel,
propTable->GetProperty(aPrevInFlow, nsLayoutAtoms::embeddingLevel),
nsnull, nsnull);
propTable->SetProperty(this, nsLayoutAtoms::baseLevel,
propTable->GetProperty(aPrevInFlow, nsLayoutAtoms::baseLevel),
nsnull, nsnull);
propTable->SetProperty(this, nsLayoutAtoms::charType,
propTable->GetProperty(aPrevInFlow, nsLayoutAtoms::charType),
nsnull, nsnull);
void* value = propTable->GetProperty(aPrevInFlow,
nsLayoutAtoms::nextBidi);
if (value) { // nextBidi
// aPrevInFlow and this frame will point to the same next bidi frame.
propTable->SetProperty(this, nsLayoutAtoms::nextBidi,
value, nsnull, nsnull);
( (nsIFrame*) value)->GetOffsets(start, end);
mContentLength = PR_MAX(1, start - mContentOffset);
} // value
mState |= NS_FRAME_IS_BIDI;
} // prev frame is bidi
#endif // IBMBIDI
}
return rv;
}
NS_IMETHODIMP
nsContinuingTextFrame::Destroy(nsPresContext* aPresContext)
{
if (mPrevInFlow || mNextInFlow) {
nsSplittableFrame::RemoveFromFlow(this);
}
// Let the base class destroy the frame
return nsFrame::Destroy(aPresContext);
}
nsIFrame*
nsContinuingTextFrame::GetFirstInFlow() const
{
// Can't cast to |nsContinuingTextFrame*| because the first one isn't.
nsIFrame *firstInFlow,
*previous = NS_CONST_CAST(nsIFrame*,
NS_STATIC_CAST(const nsIFrame*, this));
do {
firstInFlow = previous;
previous = firstInFlow->GetPrevInFlow();
} while (previous);
return firstInFlow;
}
inline nscolor EnsureDifferentColors(nscolor colorA, nscolor colorB)
{
if (colorA == colorB)
{
nscolor res;
res = NS_RGB(NS_GET_R(colorA) ^ 0xff,
NS_GET_G(colorA) ^ 0xff,
NS_GET_B(colorA) ^ 0xff);
return res;
}
return colorA;
}
//DRAW SELECTION ITERATOR USED FOR TEXTFRAMES ONLY
//helper class for drawing multiply selected text
class DrawSelectionIterator
{
enum {SELECTION_TYPES_WE_CARE_ABOUT=nsISelectionController::SELECTION_NONE+nsISelectionController::SELECTION_NORMAL};
public:
DrawSelectionIterator(nsIContent *aContent, const SelectionDetails *aSelDetails, PRUnichar *aText,
PRUint32 aTextLength, nsTextFrame::TextPaintStyle &aTextStyle,
PRInt16 aSelectionStatus, nsPresContext *aPresContext,
nsStyleContext *aStyleContext);
~DrawSelectionIterator();
PRBool First();
PRBool Next();
PRBool IsDone();
PRBool IsLast();
PRUnichar * CurrentTextUnicharPtr();
char * CurrentTextCStrPtr();
PRUint32 CurrentLength();
nsTextFrame::TextPaintStyle & CurrentStyle();
PRBool IsBeforeOrAfter();
/**
* Get foreground color, background color, whether the background is transparent,
* and whether the current range is the normal selection.
*
* @param aForeColor [out] returns the foreground color of the current range.
* @param aBackColor [out] returns the background color of the current range.
* Note that this value is undefined if aBackIsTransparent
* is true or if @return is false.
* @param aBackIsTransparent [out] returns whether the background is transparent.
* If true, the background is transparent.
* Otherwise, it isn't so.
* @return whether the current range is a normal selection.
*/
PRBool GetSelectionColors(nscolor *aForeColor, nscolor *aBackColor, PRBool *aBackIsTransparent);
private:
union {
PRUnichar *mUniStr;
char *mCStr;
};
PRUint32 mLength;
PRUint32 mCurrentIdx;
PRUint32 mCurrentLength;
nsTextFrame::TextPaintStyle &mOldStyle;//base new styles on this one???
const SelectionDetails *mDetails;
PRBool mDone;
PRUint8 * mTypes;
PRBool mInit;
PRInt16 mSelectionStatus;//see nsIDocument.h SetDisplaySelection()
nscolor mFrameBackgroundColor;
PRInt32 mSufficientContrast;
nscolor mDisabledColor;
nscolor mAttentionColor;
PRBool mSelectionPseudoStyle;
nscolor mSelectionPseudoFGcolor;
nscolor mSelectionPseudoBGcolor;
PRBool mSelectionPseudoBGIsTransparent;
//private methods
void FillCurrentData();
};
DrawSelectionIterator::DrawSelectionIterator(nsIContent *aContent,
const SelectionDetails *aSelDetails,
PRUnichar *aText,
PRUint32 aTextLength,
nsTextFrame::TextPaintStyle &aTextStyle,
PRInt16 aSelectionStatus,
nsPresContext *aPresContext,
nsStyleContext *aStyleContext)
:mOldStyle(aTextStyle)
{
mDetails = aSelDetails;
mCurrentIdx = 0;
mUniStr = aText;
mLength = aTextLength;
mTypes = nsnull;
mInit = PR_FALSE;
mSelectionStatus = aSelectionStatus;
mSelectionPseudoStyle = PR_FALSE;
mSelectionPseudoBGIsTransparent = PR_FALSE;
const nsStyleBackground* bg =
nsCSSRendering::FindNonTransparentBackground(aStyleContext);
NS_ASSERTION(bg, "Cannot find NonTransparentBackground.");
mFrameBackgroundColor = bg->mBackgroundColor;
if (aContent) {
nsRefPtr<nsStyleContext> sc;
sc = aPresContext->StyleSet()->
ProbePseudoStyleFor(aContent->GetParent(),
nsCSSPseudoElements::mozSelection, aStyleContext);
if (sc) {
mSelectionPseudoStyle = PR_TRUE;
bg = sc->GetStyleBackground();
mSelectionPseudoBGIsTransparent = PRBool(bg->mBackgroundFlags & NS_STYLE_BG_COLOR_TRANSPARENT);
if (!mSelectionPseudoBGIsTransparent )
mSelectionPseudoBGcolor = bg->mBackgroundColor;
mSelectionPseudoFGcolor = sc->GetStyleColor()->mColor;
}
}
// Get background colors for disabled selection at attention-getting selection (used with type ahead find)
nsILookAndFeel *look = aPresContext->LookAndFeel();
nscolor defaultWindowBackgroundColor;
look->GetColor(nsILookAndFeel::eColor_WindowBackground,
defaultWindowBackgroundColor);
look->GetColor(nsILookAndFeel::eColor_TextSelectBackgroundAttention,
mAttentionColor);
look->GetColor(nsILookAndFeel::eColor_TextSelectBackgroundDisabled,
mDisabledColor);
mDisabledColor = EnsureDifferentColors(mDisabledColor,
mOldStyle.mSelectionBGColor);
mAttentionColor = EnsureDifferentColors(mAttentionColor,
mOldStyle.mSelectionBGColor);
mSufficientContrast =
PR_MIN(PR_MIN(NS_SUFFICIENT_LUMINOSITY_DIFFERENCE,
NS_LUMINOSITY_DIFFERENCE(mOldStyle.mSelectionTextColor,
mOldStyle.mSelectionBGColor)),
NS_LUMINOSITY_DIFFERENCE(defaultWindowBackgroundColor,
mOldStyle.mSelectionBGColor));
if (!aSelDetails)
{
mDone = PR_TRUE;
return;
}
mDone = (PRBool)(mCurrentIdx>=mLength);
if (mDone)
return;
//special case for 1 selection. later
const SelectionDetails *details = aSelDetails;
if (details->mNext)
{
mTypes = new PRUint8[mLength];
if (!mTypes)
return;
memset(mTypes,0,mLength);//initialize to 0
while (details)
{
if ((details->mType & SELECTION_TYPES_WE_CARE_ABOUT ) &&
(details->mStart != details->mEnd))
{
mInit = PR_TRUE;//WE FOUND SOMETHING WE CARE ABOUT
for (int i = details->mStart; i < details->mEnd; i++)
{
if ((PRUint32)i>=mLength)
{
NS_ASSERTION(0,"Selection Details out of range?");
return;//eh
}
mTypes[i]|=details->mType;//add this bit
}
}
details= details->mNext;
}
if (!mInit && mTypes) //we have details but none that we care about.
{
delete [] mTypes;
mTypes = nsnull;
mDone = PR_TRUE;//we are finished
}
}
else if (details->mStart == details->mEnd)//no collapsed selections here!
{
mDone = PR_TRUE;
return;
}
else if (!(details->mType & SELECTION_TYPES_WE_CARE_ABOUT ))//if all we have is selection we DONT care about, do nothing
{
mDone = PR_TRUE;
return;
}
mInit = PR_TRUE;
}
DrawSelectionIterator::~DrawSelectionIterator()
{
if (mTypes)
delete [] mTypes;
}
void
DrawSelectionIterator::FillCurrentData()
{
if (mDone)
return;
mCurrentIdx += mCurrentLength; // advance to this chunk
mCurrentLength = 0;
if (mCurrentIdx >= mLength)
{
mDone = PR_TRUE;
return;
}
if (!mTypes)
{
if (mCurrentIdx < (PRUint32)mDetails->mStart)
{
mCurrentLength = mDetails->mStart;
}
else if (mCurrentIdx == (PRUint32)mDetails->mStart)
{//start
mCurrentLength = mDetails->mEnd-mCurrentIdx;
}
else if (mCurrentIdx > (PRUint32)mDetails->mStart)//last unselected part
{
mCurrentLength = mLength - mDetails->mEnd;
}
}
else
{
uint8 typevalue = mTypes[mCurrentIdx];
while (mCurrentIdx+mCurrentLength < mLength && typevalue == mTypes[mCurrentIdx+mCurrentLength])
{
mCurrentLength++;
}
}
// never overrun past mLength
if (mCurrentIdx+mCurrentLength > mLength)
{
mCurrentLength = mLength - mCurrentIdx;
}
}
PRBool
DrawSelectionIterator::First()
{
if (!mInit)
return PR_FALSE;
mCurrentIdx = 0;
mCurrentLength = 0;
if (!mTypes && mDetails->mStart == mDetails->mEnd)//no collapsed selections here!
mDone = PR_TRUE;
mDone = (mCurrentIdx+mCurrentLength) >= mLength;
FillCurrentData();
return PR_TRUE;
}
PRBool
DrawSelectionIterator::Next()
{
if (mDone || !mInit)
return PR_FALSE;
FillCurrentData();//advances to next chunk
return PR_TRUE;
}
PRBool
DrawSelectionIterator::IsLast()
{
return mDone || !mInit || mCurrentIdx + mCurrentLength >= mLength;
}
PRBool
DrawSelectionIterator::IsDone()
{
return mDone || !mInit;
}
PRUnichar *
DrawSelectionIterator::CurrentTextUnicharPtr()
{
return mUniStr+mCurrentIdx;
}
char *
DrawSelectionIterator::CurrentTextCStrPtr()
{
return mCStr+mCurrentIdx;
}
PRUint32
DrawSelectionIterator::CurrentLength()
{
return mCurrentLength;
}
nsTextFrame::TextPaintStyle &
DrawSelectionIterator::CurrentStyle()
{
return mOldStyle;
}
PRBool
DrawSelectionIterator::GetSelectionColors(nscolor *aForeColor,
nscolor *aBackColor,
PRBool *aBackIsTransparent)
{
*aBackIsTransparent = PR_FALSE;
PRBool isSelection =
(mTypes && (mTypes[mCurrentIdx] & nsISelectionController::SELECTION_NORMAL)) ||
(!mTypes && mCurrentIdx == (PRUint32)mDetails->mStart);
if (!isSelection) {
*aForeColor = mOldStyle.mColor->mColor;
return PR_FALSE;
}
if (mSelectionPseudoStyle &&
mSelectionStatus == nsISelectionController::SELECTION_ON) {
*aForeColor = mSelectionPseudoFGcolor;
*aBackColor = mSelectionPseudoBGcolor;
*aBackIsTransparent = mSelectionPseudoBGIsTransparent;
return PR_TRUE;
}
PRBool dontChangeTextColor =
mOldStyle.mSelectionTextColor == NS_DONT_CHANGE_COLOR;
if (dontChangeTextColor)
*aForeColor = mOldStyle.mColor->mColor;
else
*aForeColor = mOldStyle.mSelectionTextColor;
if (mSelectionStatus == nsISelectionController::SELECTION_ATTENTION)
*aBackColor = mAttentionColor;
else if (mSelectionStatus != nsISelectionController::SELECTION_ON)
*aBackColor = mDisabledColor;
else
*aBackColor = mOldStyle.mSelectionBGColor;
// We don't support selection color exchanging when selection text color is
// NS_DONT_CHANGE_COLOR. Because the text color should not be background color.
if (dontChangeTextColor) {
*aForeColor = EnsureDifferentColors(*aForeColor, *aBackColor);
return PR_TRUE;
}
// If the combination of selection background color and frame background color
// is sufficient contrast, don't exchange the selection colors.
PRInt32 backLuminosityDifference =
NS_LUMINOSITY_DIFFERENCE(*aBackColor, mFrameBackgroundColor);
if (backLuminosityDifference >= mSufficientContrast)
return PR_TRUE;
// Otherwise, we should use the higher-contrast color for the selection
// background color.
PRInt32 foreLuminosityDifference =
NS_LUMINOSITY_DIFFERENCE(*aForeColor, mFrameBackgroundColor);
if (backLuminosityDifference < foreLuminosityDifference) {
nscolor tmpColor = *aForeColor;
*aForeColor = *aBackColor;
*aBackColor = tmpColor;
}
return PR_TRUE;
}
PRBool
DrawSelectionIterator::IsBeforeOrAfter()
{
return mCurrentIdx != (PRUint32)mDetails->mStart;
}
//END DRAWSELECTIONITERATOR!!
// Flag information used by rendering code. This information is
// computed by the ResizeReflow code. The flags are stored in the
// mState variable in the frame class private section.
// Flag indicating that whitespace was skipped
#define TEXT_SKIP_LEADING_WS 0x01000000
#define TEXT_HAS_MULTIBYTE 0x02000000
#define TEXT_IN_WORD 0x04000000
// This bit is set on the first frame in a continuation indicating
// that it was chopped short because of :first-letter style.
#define TEXT_FIRST_LETTER 0x08000000
#define TEXT_WAS_TRANSFORMED 0x10000000
// Bits in mState used for reflow flags
#define TEXT_REFLOW_FLAGS 0x1F000000
#define TEXT_TRIMMED_WS 0x20000000
#define TEXT_OPTIMIZE_RESIZE 0x40000000
#define TEXT_BLINK_ON 0x80000000
#define TEXT_IS_ONLY_WHITESPACE 0x00100000
#define TEXT_ISNOT_ONLY_WHITESPACE 0x00200000
#define TEXT_WHITESPACE_FLAGS 0x00300000
#define TEXT_IS_END_OF_LINE 0x00400000
//----------------------------------------------------------------------
#if defined(DEBUG_rbs) || defined(DEBUG_bzbarsky)
static void
VerifyNotDirty(nsFrameState state)
{
PRBool isZero = state & NS_FRAME_FIRST_REFLOW;
PRBool isDirty = state & NS_FRAME_IS_DIRTY;
if (!isZero && isDirty)
NS_WARNING("internal offsets may be out-of-sync");
}
#define DEBUG_VERIFY_NOT_DIRTY(state) \
VerifyNotDirty(state)
#else
#define DEBUG_VERIFY_NOT_DIRTY(state)
#endif
nsresult
NS_NewTextFrame(nsIPresShell* aPresShell, nsIFrame** aNewFrame)
{
NS_PRECONDITION(aNewFrame, "null OUT ptr");
if (nsnull == aNewFrame) {
return NS_ERROR_NULL_POINTER;
}
nsTextFrame* it = new (aPresShell) nsTextFrame;
if (nsnull == it) {
return NS_ERROR_OUT_OF_MEMORY;
}
*aNewFrame = it;
return NS_OK;
}
nsresult
NS_NewContinuingTextFrame(nsIPresShell* aPresShell, nsIFrame** aNewFrame)
{
NS_PRECONDITION(aNewFrame, "null OUT ptr");
if (nsnull == aNewFrame) {
return NS_ERROR_NULL_POINTER;
}
nsContinuingTextFrame* it = new (aPresShell) nsContinuingTextFrame;
if (nsnull == it) {
return NS_ERROR_OUT_OF_MEMORY;
}
*aNewFrame = it;
return NS_OK;
}
nsTextFrame::nsTextFrame()
{
}
nsTextFrame::~nsTextFrame()
{
if (0 != (mState & TEXT_BLINK_ON))
{
nsBlinkTimer::RemoveBlinkFrame(this);
}
}
nsIDocument*
nsTextFrame::GetDocument(nsPresContext* aPresContext)
{
nsIDocument *result = nsnull;
if (mContent) {
result = mContent->GetDocument();
}
if (!result && aPresContext) {
result = aPresContext->PresShell()->GetDocument();
}
return result;
}
NS_IMETHODIMP
nsTextFrame::GetCursor(const nsPoint& aPoint,
nsIFrame::Cursor& aCursor)
{
FillCursorInformationFromStyle(GetStyleUserInterface(), aCursor);
if (NS_STYLE_CURSOR_AUTO == aCursor.mCursor) {
aCursor.mCursor = NS_STYLE_CURSOR_TEXT;
// If tabindex >= 0, use default cursor to indicate it's not selectable
nsIFrame *ancestorFrame = this;
while ((ancestorFrame = ancestorFrame->GetParent()) != nsnull) {
nsIContent *ancestorContent = ancestorFrame->GetContent();
if (ancestorContent && ancestorContent->HasAttr(kNameSpaceID_None, nsHTMLAtoms::tabindex)) {
nsAutoString tabIndexStr;
ancestorContent->GetAttr(kNameSpaceID_None, nsHTMLAtoms::tabindex, tabIndexStr);
if (!tabIndexStr.IsEmpty()) {
PRInt32 rv, tabIndexVal = tabIndexStr.ToInteger(&rv);
if (NS_SUCCEEDED(rv) && tabIndexVal >= 0) {
aCursor.mCursor = NS_STYLE_CURSOR_DEFAULT;
break;
}
}
}
}
}
return NS_OK;
}
nsIFrame*
nsTextFrame::GetLastInFlow() const
{
nsTextFrame* lastInFlow = (nsTextFrame*)this;
while (lastInFlow->mNextInFlow) {
lastInFlow = (nsTextFrame*)lastInFlow->mNextInFlow;
}
NS_POSTCONDITION(lastInFlow, "illegal state in flow chain.");
return lastInFlow;
}
NS_IMETHODIMP
nsTextFrame::CharacterDataChanged(nsPresContext* aPresContext,
nsIContent* aChild,
PRBool aAppend)
{
nsIFrame* targetTextFrame = this;
PRBool markAllDirty = PR_TRUE;
if (aAppend) {
markAllDirty = PR_FALSE;
nsTextFrame* frame = (nsTextFrame*)GetLastInFlow();
frame->mState &= ~TEXT_WHITESPACE_FLAGS;
frame->mState |= NS_FRAME_IS_DIRTY;
targetTextFrame = frame;
}
if (markAllDirty) {
// Mark this frame and all the next-in-flow frames as dirty
nsTextFrame* textFrame = this;
nsPropertyTable *propTable = aPresContext->PropertyTable();
while (textFrame) {
textFrame->mState &= ~TEXT_WHITESPACE_FLAGS;
textFrame->mState |= NS_FRAME_IS_DIRTY;
#ifdef IBMBIDI
void* nextBidiFrame;
if ((textFrame->mState & NS_FRAME_IS_BIDI) &&
(nextBidiFrame = propTable->GetProperty(textFrame, nsLayoutAtoms::nextBidi)))
textFrame = (nsTextFrame*)nextBidiFrame;
else
#endif
textFrame = (nsTextFrame*)textFrame->mNextInFlow;
}
}
// Ask the parent frame to reflow me.
nsIPresShell *shell = aPresContext->GetPresShell();
if (shell && mParent) {
mParent->ReflowDirtyChild(shell, targetTextFrame);
}
return NS_OK;
}
NS_IMETHODIMP
nsTextFrame::Paint(nsPresContext* aPresContext,
nsIRenderingContext& aRenderingContext,
const nsRect& aDirtyRect,
nsFramePaintLayer aWhichLayer,
PRUint32 aFlags)
{
if (NS_FRAME_PAINT_LAYER_FOREGROUND != aWhichLayer) {
return NS_OK;
}
if ((0 != (mState & TEXT_BLINK_ON)) && nsBlinkTimer::GetBlinkIsOff()) {
return NS_OK;
}
nsStyleContext* sc = mStyleContext;
PRBool isVisible;
if (NS_SUCCEEDED(IsVisibleForPainting(aPresContext, aRenderingContext, PR_TRUE, &isVisible)) && isVisible) {
TextPaintStyle ts(aPresContext, aRenderingContext, mStyleContext);
if (ts.mSmallCaps || (0 != ts.mWordSpacing) || (0 != ts.mLetterSpacing)
|| ts.mJustifying) {
PaintTextSlowly(aPresContext, aRenderingContext, sc, ts, 0, 0);
}
else {
// Get the text fragment
nsCOMPtr<nsITextContent> tc = do_QueryInterface(mContent);
const nsTextFragment* frag = nsnull;
if (tc) {
frag = tc->Text();
if (!frag) {
return NS_ERROR_FAILURE;
}
}
// Choose rendering pathway based on rendering context performance
// hint, whether it needs to be transformed, and whether it's
// multi-byte
PRBool hasMultiByteChars = (0 != (mState & TEXT_HAS_MULTIBYTE));
PRUint32 hints = 0;
aRenderingContext.GetHints(hints);
#ifdef IBMBIDI
PRBool bidiEnabled = aPresContext->BidiEnabled();
#else
const PRBool bidiEnabled = PR_FALSE;
#endif // IBMBIDI
// * BiDi text or text with multi-byte characters must always be
// rendered as Unicode.
// * Non-transformed, 1-byte text should always be rendered as
// ASCII.
// * Other transformed or 2-byte text should be rendered according
// to the preference of the hint from the rendering context.
if (bidiEnabled || hasMultiByteChars ||
((0 == (hints & NS_RENDERING_HINT_FAST_8BIT_TEXT)) &&
(frag->Is2b() || (0 != (mState & TEXT_WAS_TRANSFORMED))))) {
PaintUnicodeText(aPresContext, aRenderingContext, sc, ts, 0, 0);
}
else {
PaintAsciiText(aPresContext, aRenderingContext, sc, ts, 0, 0);
}
}
}
DO_GLOBAL_REFLOW_COUNT_DSP("nsTextFrame", &aRenderingContext);
return NS_OK;
}
PRBool
nsTextFrame::IsChineseJapaneseLangGroup()
{
const nsStyleVisibility* visibility = mStyleContext->GetStyleVisibility();
if (visibility->mLangGroup == nsLayoutAtoms::Japanese
|| visibility->mLangGroup == nsLayoutAtoms::Chinese
|| visibility->mLangGroup == nsLayoutAtoms::Taiwanese
|| visibility->mLangGroup == nsLayoutAtoms::HongKongChinese)
return PR_TRUE;
return PR_FALSE;
}
/*
* Currently only Unicode characters below 0x10000 have their spacing modified
* by justification. If characters above 0x10000 turn out to need
* justification spacing, that will require extra work. Currently,
* this function must not include 0xd800 to 0xdbff because these characters
* are surrogates.
*/
PRBool
nsTextFrame::IsJustifiableCharacter(PRUnichar aChar, PRBool aLangIsCJ)
{
if (0x20u == aChar || 0xa0u == aChar)
return PR_TRUE;
if (aChar < 0x2150u)
return PR_FALSE;
if (aLangIsCJ && (
(0x2150u <= aChar && aChar <= 0x22ffu) || // Number Forms, Arrows, Mathematical Operators
(0x2460u <= aChar && aChar <= 0x24ffu) || // Enclosed Alphanumerics
(0x2580u <= aChar && aChar <= 0x27bfu) || // Block Elements, Geometric Shapes, Miscellaneous Symbols, Dingbats
(0x27f0u <= aChar && aChar <= 0x2bffu) || // Supplemental Arrows-A, Braille Patterns, Supplemental Arrows-B,
// Miscellaneous Mathematical Symbols-B, Supplemental Mathematical Operators,
// Miscellaneous Symbols and Arrows
(0x2e80u <= aChar && aChar <= 0x312fu) || // CJK Radicals Supplement, CJK Radicals Supplement,
// Ideographic Description Characters, CJK Symbols and Punctuation,
// Hiragana, Katakana, Bopomofo
(0x3190u <= aChar && aChar <= 0xabffu) || // Kanbun, Bopomofo Extended, Katakana Phonetic Extensions,
// Enclosed CJK Letters and Months, CJK Compatibility,
// CJK Unified Ideographs Extension A, Yijing Hexagram Symbols,
// CJK Unified Ideographs, Yi Syllables, Yi Radicals
(0xf900u <= aChar && aChar <= 0xfaffu) || // CJK Compatibility Ideographs
(0xff5eu <= aChar && aChar <= 0xff9fu) // Halfwidth and Fullwidth Forms(a part)
))
return PR_TRUE;
return PR_FALSE;
}
nsresult
nsTextFrame::FillClusterBuffer(nsPresContext *aPresContext, const PRUnichar *aText,
PRUint32 aLength, nsAutoPRUint8Buffer& aClusterBuffer)
{
nsresult rv = aClusterBuffer.GrowTo(aLength);
NS_ENSURE_SUCCESS(rv, rv);
// Fill in the cluster hint information, if it's available.
nsCOMPtr<nsIRenderingContext> acx;
PRUint32 clusterHint = 0;
nsIPresShell *shell = aPresContext->GetPresShell();
if (shell) {
rv = shell->CreateRenderingContext(this, getter_AddRefs(acx));
NS_ENSURE_SUCCESS(rv, rv);
// Find the font metrics for this text
SetFontFromStyle(acx, mStyleContext);
acx->GetHints(clusterHint);
clusterHint &= NS_RENDERING_HINT_TEXT_CLUSTERS;
}
if (clusterHint) {
rv = acx->GetClusterInfo(aText, aLength, aClusterBuffer.mBuffer);
}
else {
memset(aClusterBuffer.mBuffer, 1, sizeof(PRInt8) * aLength);
}
return rv;
}
inline PRBool IsEndOfLine(nsFrameState aState)
{
return (aState & TEXT_IS_END_OF_LINE) ? PR_TRUE : PR_FALSE;
}
/**
* Prepare the text in the content for rendering. If aIndexes is not nsnull
* then fill in aIndexes's with the mapping from the original input to
* the prepared output.
*/
void
nsTextFrame::PrepareUnicodeText(nsTextTransformer& aTX,
nsAutoIndexBuffer* aIndexBuffer,
nsAutoTextBuffer* aTextBuffer,
PRInt32* aTextLen,
PRBool aForceArabicShaping,
PRIntn* aJustifiableCharCount)
{
// Setup transform to operate starting in the content at our content
// offset
aTX.Init(this, mContent, mContentOffset, aForceArabicShaping);
PRInt32 strInx = mContentOffset;
PRInt32* indexp = aIndexBuffer ? aIndexBuffer->mBuffer : nsnull;
// Skip over the leading whitespace
PRInt32 n = mContentLength;
if (0 != (mState & TEXT_SKIP_LEADING_WS)) {
PRBool isWhitespace, wasTransformed;
PRInt32 wordLen, contentLen;
// Set maximum word length. This is an ABUSE of the variable
// because on entry, this is DOM content length, but on exit,
// GetNextWord returns a transformed-string length in here!
wordLen = mContentOffset + mContentLength;
aTX.GetNextWord(PR_FALSE, &wordLen, &contentLen, &isWhitespace, &wasTransformed);
// we trip this assertion in bug 31053, but I think it's unnecessary
//NS_ASSERTION(isWhitespace, "mState and content are out of sync");
if (isWhitespace) {
if (nsnull != indexp) {
// Point mapping indicies at the same content index since
// all of the compressed whitespace maps down to the same
// renderable character.
PRInt32 i = contentLen;
while (--i >= 0) {
*indexp++ = strInx;
}
}
n -= contentLen;
if(n<0)
NS_WARNING("mContentLength is < FragmentLength");
}
}
// Rescan the content and transform it. Stop when we have consumed
// mContentLength characters.
PRUint8 textTransform = GetStyleText()->mTextTransform;
PRBool inWord = (TEXT_IN_WORD & mState) ? PR_TRUE : PR_FALSE;
PRInt32 column = mColumn;
PRInt32 textLength = 0;
PRInt32 dstOffset = 0;
nsAutoTextBuffer tmpTextBuffer;
nsAutoTextBuffer* textBuffer = aTextBuffer;
if (!textBuffer && aJustifiableCharCount)
textBuffer = &tmpTextBuffer;
while (n > 0) {
PRUnichar* bp;
PRBool isWhitespace, wasTransformed;
PRInt32 wordLen, contentLen;
// Set maximum word length. This is an ABUSE of the variable
// because on entry, this is DOM content length, but on exit,
// GetNextWord returns a transformed-string length in here!
wordLen = mContentOffset + mContentLength;
// Get the next word
bp = aTX.GetNextWord(inWord, &wordLen, &contentLen, &isWhitespace, &wasTransformed);
if (nsnull == bp) {
if (indexp) {
while (--n >= 0) {
*indexp++ = strInx;
}
}
break;
}
inWord = PR_FALSE;
if (isWhitespace) {
if ('\t' == bp[0]) {
PRInt32 spaces = 8 - (7 & column);
PRUnichar* tp = bp;
wordLen = spaces;
while (--spaces >= 0) {
*tp++ = ' ';
}
// XXX This is a one to many mapping that I think isn't handled well
if (nsnull != indexp) {
*indexp++ = strInx;
strInx += wordLen;
}
}
else if ('\n' == bp[0]) {
if (nsnull != indexp) {
*indexp++ = strInx;
}
break;
}
else if (nsnull != indexp) {
if (1 == wordLen) {
// Point mapping indicies at the same content index since
// all of the compressed whitespace maps down to the same
// renderable character.
PRInt32 i = contentLen;
while (--i >= 0) {
*indexp++ = strInx;
}
strInx++;
} else {
// Point mapping indicies at each content index in the word
PRInt32 i = contentLen;
while (--i >= 0) {
*indexp++ = strInx++;
}
}
}
}
else {
PRInt32 i = contentLen;
if (nsnull != indexp) {
// Point mapping indices at each content index in the word
if (!wasTransformed) {
while (--i >= 0) {
*indexp++ = strInx++;
}
} else {
PRUnichar* tp = bp;
PRBool caseChanged =
textTransform == NS_STYLE_TEXT_TRANSFORM_UPPERCASE ||
textTransform == NS_STYLE_TEXT_TRANSFORM_CAPITALIZE;
while (--i >= 0) {
PRUnichar ch = aTX.GetContentCharAt(mContentOffset +
indexp - aIndexBuffer->mBuffer);
if (IS_DISCARDED(ch) || ch == '\n') {
*indexp++ = strInx;
continue;
}
*indexp++ = strInx++;
// Point any capitalized German &szlig; to 'SS'
if (caseChanged && ch == kSZLIG && *tp == PRUnichar('S')) {
++strInx;
++tp;
}
++tp;
}
}
}
}
// Grow the buffer before we run out of room.
if (textBuffer != nsnull && dstOffset + wordLen > textBuffer->mBufferLen) {
nsresult rv = textBuffer->GrowBy(wordLen);
if (NS_FAILED(rv)) {
break;
}
}
column += wordLen;
textLength += wordLen;
n -= contentLen;
if (textBuffer != nsnull) {
memcpy(textBuffer->mBuffer + dstOffset, bp,
sizeof(PRUnichar)*wordLen);
}
dstOffset += wordLen;
}
#ifdef DEBUG
if (aIndexBuffer) {
NS_ASSERTION(indexp <= aIndexBuffer->mBuffer + aIndexBuffer->mBufferLen,
"yikes - we just overwrote memory");
}
if (textBuffer) {
NS_ASSERTION(dstOffset <= textBuffer->mBufferLen,
"yikes - we just overwrote memory");
}
#endif
// Remove trailing whitespace if it was trimmed after reflow
// TEXT_TRIMMED_WS can be set in measureText during reflow, and
// nonexitent text buffer may occur in this situation.
if (TEXT_TRIMMED_WS & mState && textBuffer) {
if (--dstOffset >= 0) {
PRUnichar ch = textBuffer->mBuffer[dstOffset];
if (XP_IS_SPACE(ch))
textLength--;
}
}
if (aIndexBuffer) {
PRInt32* ip = aIndexBuffer->mBuffer;
ip[mContentLength] = ip[mContentLength-1];
if ((ip[mContentLength] - mContentOffset) < textLength) {
// Must set up last one for selection beyond edge if in boundary
ip[mContentLength] = textLength + mContentOffset;
}
}
*aTextLen = textLength;
if (aJustifiableCharCount && textBuffer) {
PRBool isCJ = IsChineseJapaneseLangGroup();
PRIntn numJustifiableCharacter = 0;
PRInt32 justifiableRange = textLength;
if (IsEndOfLine(mState))
justifiableRange--;
for (PRInt32 i = 0; i < justifiableRange; i++) {
if (IsJustifiableCharacter(textBuffer->mBuffer[i], isCJ))
numJustifiableCharacter++;
}
*aJustifiableCharCount = numJustifiableCharacter;
}
}
//#define SHOW_SELECTION_CURSOR // should be turned off when the caret code is activated
#ifdef SHOW_SELECTION_CURSOR
// XXX This clearly needs to be done by the container, *somehow*
#define CURSOR_COLOR NS_RGB(0,0,255)
static void
RenderSelectionCursor(nsIRenderingContext& aRenderingContext,
nscoord dx, nscoord dy, nscoord aHeight,
nscolor aCursorColor)
{
nsPoint pnts[4];
nscoord ox = aHeight / 4;
nscoord oy = ox;
nscoord x0 = dx;
nscoord y0 = dy + aHeight;
pnts[0].x = x0 - ox;
pnts[0].y = y0;
pnts[1].x = x0;
pnts[1].y = y0 - oy;
pnts[2].x = x0 + ox;
pnts[2].y = y0;
pnts[3].x = x0 - ox;
pnts[3].y = y0;
// Draw little blue triangle
aRenderingContext.SetColor(aCursorColor);
aRenderingContext.FillPolygon(pnts, 4);
}
#endif
// XXX letter-spacing
// XXX word-spacing
#if defined(XP_MACOSX)
#define NO_INVERT
#elif defined(XP_WIN) || defined(XP_OS2) || defined(XP_UNIX)
#define USE_INVERT_FOR_SELECTION
#endif
// XXX we should get the following from style sheet or LookAndFeel later
#if defined(NO_INVERT)
#define IME_UNDERLINECOLOR NS_RGB(149,149,149) //light gray
#define IME_SELECTED_UNDERLINECOLOR NS_RGB(0,0,0) //black
#else
#define IME_RAW_COLOR NS_RGB(198,33,66)
#define IME_CONVERTED_COLOR NS_RGB(255,198,198)
#endif
void
nsTextFrame::PaintTextDecorations(nsIRenderingContext& aRenderingContext,
nsStyleContext* aStyleContext,
nsPresContext* aPresContext,
TextPaintStyle& aTextStyle,
nscoord aX, nscoord aY, nscoord aWidth,
PRBool aRightToLeftText,
PRUnichar *aText, /*=nsnull*/
SelectionDetails *aDetails,/*= nsnull*/
PRUint32 aIndex, /*= 0*/
PRUint32 aLength, /*= 0*/
const nscoord* aSpacing /* = nsnull*/ )
{
// Quirks mode text decoration are rendered by children; see bug 1777
// In non-quirks mode, nsHTMLContainer::Paint and nsBlockFrame::Paint
// does the painting of text decorations.
if (eCompatibility_NavQuirks == aPresContext->CompatibilityMode()) {
nscolor overColor, underColor, strikeColor;
PRBool useOverride = PR_FALSE;
nscolor overrideColor;
PRUint8 decorations = NS_STYLE_TEXT_DECORATION_NONE;
// A mask of all possible decorations.
PRUint8 decorMask = NS_STYLE_TEXT_DECORATION_UNDERLINE |
NS_STYLE_TEXT_DECORATION_OVERLINE |
NS_STYLE_TEXT_DECORATION_LINE_THROUGH;
nsStyleContext* context = aStyleContext;
PRBool hasDecorations = context->HasTextDecorations();
while (hasDecorations) {
const nsStyleTextReset* styleText = context->GetStyleTextReset();
if (!useOverride &&
(NS_STYLE_TEXT_DECORATION_OVERRIDE_ALL &
styleText->mTextDecoration)) {
// This handles the <a href="blah.html"><font color="green">La
// la la</font></a> case. The link underline should be green.
useOverride = PR_TRUE;
overrideColor = context->GetStyleColor()->mColor;
}
PRUint8 useDecorations = decorMask & styleText->mTextDecoration;
if (useDecorations) {// a decoration defined here
nscolor color = context->GetStyleColor()->mColor;
if (NS_STYLE_TEXT_DECORATION_UNDERLINE & useDecorations) {
underColor = useOverride ? overrideColor : color;
decorMask &= ~NS_STYLE_TEXT_DECORATION_UNDERLINE;
decorations |= NS_STYLE_TEXT_DECORATION_UNDERLINE;
}
if (NS_STYLE_TEXT_DECORATION_OVERLINE & useDecorations) {
overColor = useOverride ? overrideColor : color;
decorMask &= ~NS_STYLE_TEXT_DECORATION_OVERLINE;
decorations |= NS_STYLE_TEXT_DECORATION_OVERLINE;
}
if (NS_STYLE_TEXT_DECORATION_LINE_THROUGH & useDecorations) {
strikeColor = useOverride ? overrideColor : color;
decorMask &= ~NS_STYLE_TEXT_DECORATION_LINE_THROUGH;
decorations |= NS_STYLE_TEXT_DECORATION_LINE_THROUGH;
}
}
if (0 == decorMask)
break;
context = context->GetParent();
if (!context)
break;
hasDecorations = context->HasTextDecorations();
}
nscoord offset;
nscoord size;
nscoord baseline = mAscent;
if (decorations & (NS_FONT_DECORATION_OVERLINE |
NS_FONT_DECORATION_UNDERLINE)) {
aTextStyle.mNormalFont->GetUnderline(offset, size);
if (decorations & NS_FONT_DECORATION_OVERLINE) {
aRenderingContext.SetColor(overColor);
aRenderingContext.FillRect(aX, aY, aWidth, size);
}
if (decorations & NS_FONT_DECORATION_UNDERLINE) {
aRenderingContext.SetColor(underColor);
aRenderingContext.FillRect(aX, aY + baseline - offset, aWidth, size);
}
}
if (decorations & NS_FONT_DECORATION_LINE_THROUGH) {
aTextStyle.mNormalFont->GetStrikeout(offset, size);
aRenderingContext.SetColor(strikeColor);
aRenderingContext.FillRect(aX, aY + baseline - offset, aWidth, size);
}
}
if (aDetails){
nsRect rect = GetRect();
while(aDetails){
const nscoord* sp= aSpacing;
PRInt32 startOffset = 0;
PRInt32 textWidth = 0;
PRInt32 start = PR_MAX(0,(aDetails->mStart - (PRInt32)aIndex));
PRInt32 end = PR_MIN((PRInt32)aLength,(aDetails->mEnd - (PRInt32)aIndex));
PRInt32 i;
if ((start < end) && ((aLength - start) > 0))
{
//aDetails allready processed to have offsets from frame start not content offsets
if (start < end){
if (aLength == 1)
textWidth = aWidth;
else {
if (aDetails->mStart > 0){
if (sp)
{
for (i = 0; i < start;i ++){
startOffset += *sp ++;
}
}
else
aRenderingContext.GetWidth(aText, start, startOffset);
}
if (sp){
for (i = start; i < end;i ++){
textWidth += *sp ++;
}
}
else
aRenderingContext.GetWidth(aText + start,
PRUint32(end - start), textWidth);
}
nscoord offset, size;
nscoord baseline = mAscent;
switch (aDetails->mType)
{
case nsISelectionController::SELECTION_NORMAL:
#if 0
{
//using new selectionpainting now
//
// XOR InvertRect is currently implemented only in the unix and windows
// rendering contexts. When other platforms implement InvertRect(), they
// can be added here. Eventually this #ifdef should die.
//
// For platforms that dont implement InvertRect(), the selection will be
// a non-filled rectangle.
#ifdef USE_INVERT_FOR_SELECTION
aRenderingContext.SetColor(NS_RGB(255,255,255));
aRenderingContext.InvertRect(aX + startOffset, aY, textWidth, rect.height);
#else
aRenderingContext.SetColor(NS_RGB(0,0,0));
aRenderingContext.DrawRect(aX + startOffset, aY, textWidth, rect.height);
#endif
}
#endif //0
break;
case nsISelectionController::SELECTION_SPELLCHECK:{
aTextStyle.mNormalFont->GetUnderline(offset, size);
aRenderingContext.SetLineStyle(nsLineStyle_kDotted);
aRenderingContext.SetColor(NS_RGB(255,0,0));
/*
* If the rendering context is drawing text from right to left,
* reverse the coordinates of the underline to match.
*/
if (aRightToLeftText) {
nscoord rightEdge = aX + aWidth;
aRenderingContext.DrawLine(rightEdge - textWidth - startOffset,
aY + baseline - offset,
rightEdge - startOffset,
aY + baseline - offset);
}
else {
aRenderingContext.DrawLine(aX + startOffset,
aY + baseline - offset,
aX + startOffset + textWidth,
aY + baseline - offset);
}
}break;
#ifdef NO_INVERT
case nsISelectionController::SELECTION_IME_SELECTEDRAWTEXT:
case nsISelectionController::SELECTION_IME_SELECTEDCONVERTEDTEXT:{
NS_ASSERTION(!aRightToLeftText,
"Right-to-left text in IME not handled");
aTextStyle.mNormalFont->GetUnderline(offset, size);
aRenderingContext.SetColor(IME_SELECTED_UNDERLINECOLOR);
#ifdef XP_MACOSX // underline thickness is 2 pixel
aRenderingContext.FillRect(aX + startOffset+size, aY + baseline - offset, textWidth-2*size, 2*size);
#else
aRenderingContext.FillRect(aX + startOffset+size, aY + baseline - offset, textWidth-2*size, size);
#endif
}break;
case nsISelectionController::SELECTION_IME_RAWINPUT:
case nsISelectionController::SELECTION_IME_CONVERTEDTEXT:{
NS_ASSERTION(!aRightToLeftText,
"Right-to-left text in IME not handled");
aTextStyle.mNormalFont->GetUnderline(offset, size);
aRenderingContext.SetColor(IME_UNDERLINECOLOR);
#ifdef XP_MACOSX // underline thicness is 2 pixel
aRenderingContext.FillRect(aX + startOffset+size, aY + baseline - offset, textWidth-2*size, 2*size);
#else
aRenderingContext.FillRect(aX + startOffset+size, aY + baseline - offset, textWidth-2*size, size);
#endif
}break;
// end NO_INVERT part
#else
case nsISelectionController::SELECTION_IME_SELECTEDRAWTEXT:{
NS_ASSERTION(!aRightToLeftText,
"Right-to-left text in IME not handled");
#ifdef USE_INVERT_FOR_SELECTION
aRenderingContext.SetColor(NS_RGB(255,255,255));
aRenderingContext.InvertRect(aX + startOffset, aY, textWidth, rect.height);
#else
aRenderingContext.SetColor(NS_RGB(255,255,128));
aRenderingContext.DrawRect(aX + startOffset, aY, textWidth, rect.height);
#endif
aTextStyle.mNormalFont->GetUnderline(offset, size);
aRenderingContext.SetColor(IME_RAW_COLOR);
aRenderingContext.FillRect(aX + startOffset+size, aY + baseline - offset, textWidth-2*size, size);
}break;
case nsISelectionController::SELECTION_IME_RAWINPUT:{
NS_ASSERTION(!aRightToLeftText,
"Right-to-left text in IME not handled");
aTextStyle.mNormalFont->GetUnderline(offset, size);
aRenderingContext.SetColor(IME_RAW_COLOR);
aRenderingContext.FillRect(aX + startOffset+size, aY + baseline - offset, textWidth-2*size, size);
}break;
case nsISelectionController::SELECTION_IME_SELECTEDCONVERTEDTEXT:{
NS_ASSERTION(!aRightToLeftText,
"Right-to-left text in IME not handled");
#ifdef USE_INVERT_FOR_SELECTION
aRenderingContext.SetColor(NS_RGB(255,255,255));
aRenderingContext.InvertRect(aX + startOffset, aY, textWidth, rect.height);
#else
aRenderingContext.SetColor(NS_RGB(255,255,128));
aRenderingContext.DrawRect(aX + startOffset, aY, textWidth, rect.height);
#endif
aTextStyle.mNormalFont->GetUnderline(offset, size);
aRenderingContext.SetColor(IME_CONVERTED_COLOR);
aRenderingContext.FillRect(aX + startOffset+size, aY + baseline - offset, textWidth-2*size, size);
}break;
case nsISelectionController::SELECTION_IME_CONVERTEDTEXT:{
NS_ASSERTION(!aRightToLeftText,
"Right-to-left text in IME not handled");
aTextStyle.mNormalFont->GetUnderline(offset, size);
aRenderingContext.SetColor(IME_CONVERTED_COLOR);
aRenderingContext.FillRect(aX + startOffset+size, aY + baseline - offset, textWidth-2*size, size);
}break;
#endif
default:
NS_ASSERTION(0,"what type of selection do i not know about?");
break;
}
}
}
aDetails = aDetails->mNext;
}
}
}
nsresult
nsTextFrame::GetContentAndOffsetsForSelection(nsPresContext *aPresContext, nsIContent **aContent, PRInt32 *aOffset, PRInt32 *aLength)
{
if (!aContent || !aOffset || !aLength)
return NS_ERROR_NULL_POINTER;
//ARE WE GENERATED??
*aContent = nsnull;
*aOffset = mContentOffset;
*aLength = mContentLength;
nsIFrame *parent = GetParent();
if (parent)
{
if ((mState & NS_FRAME_GENERATED_CONTENT) != 0)//parent is generated so so are we.
{
//we COULD check the previous sibling but I dont think that is reliable
*aContent = parent->GetContent();
if(!*aContent)
return NS_ERROR_FAILURE;
NS_ADDREF(*aContent);
//ARE WE A BEFORE FRAME? if not then we assume we are an after frame. this may be bad later
nsIFrame *grandParent = parent->GetParent();
if (grandParent)
{
nsIFrame *firstParent = grandParent->GetFirstChild(nsnull);
if (firstParent)
{
*aLength = 0;
if (firstParent == parent) //then our parent is the first child of granddad. use BEFORE
{
*aOffset = 0;
}
else
{
*aOffset = (*aContent)->GetChildCount();
}
}
else
return NS_OK;
}
}
}
//END GENERATED BLOCK
if (!*aContent)
{
*aContent = mContent;
NS_IF_ADDREF(*aContent);
}
return NS_OK;
}
//---------------------------------------------------------
nsresult nsTextFrame::GetTextInfoForPainting(nsPresContext* aPresContext,
nsIRenderingContext& aRenderingContext,
nsIPresShell** aPresShell,
nsISelectionController** aSelectionController,
PRBool& aDisplayingSelection,
PRBool& aIsPaginated,
PRBool& aIsSelected,
PRBool& aHideStandardSelection,
PRInt16& aSelectionValue,
nsILineBreaker** aLineBreaker)
{
NS_ENSURE_ARG_POINTER(aPresContext);
NS_ENSURE_ARG_POINTER(aPresShell);
NS_ENSURE_ARG_POINTER(aSelectionController);
NS_ENSURE_ARG_POINTER(aLineBreaker);
//get the presshell
NS_IF_ADDREF(*aPresShell = aPresContext->GetPresShell());
if (!*aPresShell)
return NS_ERROR_FAILURE;
//get the selection controller
nsresult rv = GetSelectionController(aPresContext, aSelectionController);
if (NS_FAILED(rv) || !(*aSelectionController))
return NS_ERROR_FAILURE;
aIsPaginated = aPresContext->IsPaginated();
(*aSelectionController)->GetDisplaySelection(&aSelectionValue);
if (aIsPaginated) {
aDisplayingSelection = aPresContext->IsRenderingOnlySelection();
} else {
//if greater than hidden then we display some kind of selection
aDisplayingSelection = (aSelectionValue > nsISelectionController::SELECTION_HIDDEN);
}
PRInt16 textSel=0;
(*aSelectionController)->GetSelectionFlags(&textSel);
if (!(textSel & nsISelectionDisplay::DISPLAY_TEXT))
aDisplayingSelection = PR_FALSE;
// the spellcheck selection should be visible all the time
aHideStandardSelection = !aDisplayingSelection;
if (!aDisplayingSelection){
nsCOMPtr<nsISelection> spellcheckSelection;
(*aSelectionController)->GetSelection(nsISelectionController::SELECTION_SPELLCHECK,
getter_AddRefs(spellcheckSelection));
if (spellcheckSelection){
PRBool iscollapsed = PR_FALSE;
spellcheckSelection->GetIsCollapsed(&iscollapsed);
if (!iscollapsed)
aDisplayingSelection = PR_TRUE;
}
}
// Transform text from content into renderable form
// XXX If the text fragment is already Unicode and the text wasn't
// transformed when we formatted it, then there's no need to do all
// this and we should just render the text fragment directly. See
// PaintAsciiText()...
nsIDocument *doc = (*aPresShell)->GetDocument();
if (!doc)
return NS_ERROR_FAILURE;
NS_IF_ADDREF(*aLineBreaker = doc->GetLineBreaker());
aIsSelected = (GetStateBits() & NS_FRAME_SELECTED_CONTENT) == NS_FRAME_SELECTED_CONTENT;
return NS_OK;
}
PRBool
nsTextFrame::IsTextInSelection(nsPresContext* aPresContext,
nsIRenderingContext& aRenderingContext)
{
nsCOMPtr<nsISelectionController> selCon;
nsCOMPtr<nsIPresShell> shell;
PRBool displaySelection;
PRBool isPaginated;
PRBool isSelected;
PRBool hideStandardSelection;
PRInt16 selectionValue;
nsCOMPtr<nsILineBreaker> lb;
if (NS_FAILED(GetTextInfoForPainting(aPresContext,
aRenderingContext,
getter_AddRefs(shell),
getter_AddRefs(selCon),
displaySelection,
isPaginated,
isSelected,
hideStandardSelection,
selectionValue,
getter_AddRefs(lb)))) {
return PR_FALSE;
}
// Make enough space to transform
nsAutoTextBuffer paintBuffer;
nsAutoIndexBuffer indexBuffer;
if (NS_FAILED(indexBuffer.GrowTo(mContentLength + 1))) {
return PR_FALSE;
}
TextPaintStyle ts(aPresContext, aRenderingContext, mStyleContext);
// Transform text from content into renderable form
// XXX If the text fragment is already Unicode and the text wasn't
// transformed when we formatted it, then there's no need to do all
// this and we should just render the text fragment directly. See
// PaintAsciiText()...
nsTextTransformer tx(lb, nsnull, aPresContext);
PRInt32 textLength;
// no need to worry about justification, that's always on the slow path
PrepareUnicodeText(tx, &indexBuffer, &paintBuffer, &textLength);
PRInt32* ip = indexBuffer.mBuffer;
PRUnichar* text = paintBuffer.mBuffer;
isSelected = PR_FALSE;
if (0 != textLength) {
SelectionDetails *details = nsnull;
nsCOMPtr<nsIFrameSelection> frameSelection;
//get the frameSelection from the selection controller
if (selCon) {
frameSelection = do_QueryInterface(selCon); //this MAY implement
}
nsresult rv = NS_OK;
//if that failed get it from the pres shell
if (!frameSelection)
frameSelection = shell->FrameSelection();
nsCOMPtr<nsIContent> content;
PRInt32 offset;
PRInt32 length;
rv = GetContentAndOffsetsForSelection(aPresContext,
getter_AddRefs(content),
&offset, &length);
if (NS_SUCCEEDED(rv) && content) {
rv = frameSelection->LookUpSelection(content, mContentOffset,
mContentLength, &details,
PR_FALSE);
}
//where are the selection points "really"
SelectionDetails *sdptr = details;
while (sdptr){
sdptr->mStart = ip[sdptr->mStart] - mContentOffset;
sdptr->mEnd = ip[sdptr->mEnd] - mContentOffset;
sdptr = sdptr->mNext;
}
//while we have substrings...
//PRBool drawn = PR_FALSE;
DrawSelectionIterator iter(content, details,text,(PRUint32)textLength, ts, nsISelectionController::SELECTION_NORMAL, aPresContext, mStyleContext);
if (!iter.IsDone() && iter.First()) {
isSelected = PR_TRUE;
}
sdptr = details;
if (details) {
while ((sdptr = details->mNext) != nsnull) {
delete details;
details = sdptr;
}
delete details;
}
}
return isSelected;
}
NS_IMETHODIMP
nsTextFrame::IsVisibleForPainting(nsPresContext * aPresContext,
nsIRenderingContext& aRenderingContext,
PRBool aCheckVis,
PRBool* aIsVisible)
{
if (aCheckVis) {
if (!GetStyleVisibility()->IsVisible()) {
*aIsVisible = PR_FALSE;
return NS_OK;
}
}
// Start by assuming we are visible and need to be painted
PRBool isVisible = PR_TRUE;
if (aPresContext->IsPaginated()) {
if (aPresContext->IsRenderingOnlySelection()) {
// Check the quick way first
PRBool isSelected = (mState & NS_FRAME_SELECTED_CONTENT) == NS_FRAME_SELECTED_CONTENT;
if (isSelected) {
isVisible = IsTextInSelection(aPresContext, aRenderingContext);
} else {
isVisible = PR_FALSE;
}
}
}
*aIsVisible = isVisible;
return NS_OK;
}
void
nsTextFrame::PaintUnicodeText(nsPresContext* aPresContext,
nsIRenderingContext& aRenderingContext,
nsStyleContext* aStyleContext,
TextPaintStyle& aTextStyle,
nscoord dx, nscoord dy)
{
nsCOMPtr<nsISelectionController> selCon;
nsCOMPtr<nsIPresShell> shell;
PRBool displaySelection,canDarkenColor=PR_FALSE;
PRBool isPaginated;
PRBool isSelected;
PRBool hideStandardSelection;
PRInt16 selectionValue;
nsCOMPtr<nsILineBreaker> lb;
#ifdef IBMBIDI
PRBool isOddLevel = PR_FALSE;
#endif
if (NS_FAILED(GetTextInfoForPainting(aPresContext,
aRenderingContext,
getter_AddRefs(shell),
getter_AddRefs(selCon),
displaySelection,
isPaginated,
isSelected,
hideStandardSelection,
selectionValue,
getter_AddRefs(lb)))) {
return;
}
if(isPaginated){
canDarkenColor = CanDarken(aPresContext);
}
// Make enough space to transform
nsAutoTextBuffer paintBuffer;
nsAutoIndexBuffer indexBuffer;
if (displaySelection) {
if (NS_FAILED(indexBuffer.GrowTo(mContentLength + 1))) {
return;
}
}
nscoord width = mRect.width;
// Transform text from content into renderable form
// XXX If the text fragment is already Unicode and the text wasn't
// transformed when we formatted it, then there's no need to do all
// this and we should just render the text fragment directly. See
// PaintAsciiText()...
nsTextTransformer tx(lb, nsnull, aPresContext);
PRInt32 textLength;
// no need to worry about justification, that's always on the slow path
PrepareUnicodeText(tx, (displaySelection ? &indexBuffer : nsnull),
&paintBuffer, &textLength);
PRInt32* ip = indexBuffer.mBuffer;
PRUnichar* text = paintBuffer.mBuffer;
if (0 != textLength)
{
#ifdef IBMBIDI
PRBool isRightToLeftOnBidiPlatform = PR_FALSE;
PRBool isBidiSystem = PR_FALSE;
nsCharType charType = eCharType_LeftToRight;
if (aPresContext->BidiEnabled()) {
isBidiSystem = aPresContext->IsBidiSystem();
isOddLevel = NS_GET_EMBEDDING_LEVEL(this) & 1;
charType = (nsCharType)NS_PTR_TO_INT32(aPresContext->PropertyTable()->GetProperty(this, nsLayoutAtoms::charType));
isRightToLeftOnBidiPlatform = (isBidiSystem &&
(eCharType_RightToLeft == charType ||
eCharType_RightToLeftArabic == charType));
if (isRightToLeftOnBidiPlatform) {
// indicate that the platform should use its native
// capabilities to reorder the text with right-to-left
// base direction
aRenderingContext.SetRightToLeftText(PR_TRUE);
}
nsBidiPresUtils* bidiUtils = aPresContext->GetBidiUtils();
if (bidiUtils) {
#ifdef DEBUG
PRInt32 rememberTextLength = textLength;
#endif
bidiUtils->ReorderUnicodeText(text, textLength,
charType, isOddLevel, isBidiSystem);
NS_ASSERTION(rememberTextLength == textLength, "Bidi formatting changed text length");
}
}
#endif // IBMBIDI
if (!displaySelection || !isSelected ) //draw text normally
{
// When there is no selection showing, use the fastest and
// simplest rendering approach
aRenderingContext.SetColor(nsCSSRendering::TransformColor(aTextStyle.mColor->mColor,canDarkenColor));
aRenderingContext.DrawString(text, PRUint32(textLength), dx, dy + mAscent);
PaintTextDecorations(aRenderingContext, aStyleContext, aPresContext,
aTextStyle, dx, dy, width, PR_FALSE);
}
else
{ //we draw according to selection rules
SelectionDetails *details = nsnull;
nsCOMPtr<nsIFrameSelection> frameSelection;
//get the frameSelection from the selection controller
if (selCon)
{
frameSelection = do_QueryInterface(selCon); //this MAY implement
}
//if that failed get it from the pres shell
nsresult rv = NS_OK;
if (!frameSelection)
frameSelection = shell->FrameSelection();
nsCOMPtr<nsIContent> content;
PRInt32 offset;
PRInt32 length;
rv = GetContentAndOffsetsForSelection(aPresContext,
getter_AddRefs(content),
&offset, &length);
if (NS_SUCCEEDED(rv) && content) {
rv = frameSelection->LookUpSelection(content, mContentOffset,
mContentLength, &details,
PR_FALSE);
}
//where are the selection points "really"
SelectionDetails *sdptr = details;
while (sdptr){
sdptr->mStart = ip[sdptr->mStart] - mContentOffset;
sdptr->mEnd = ip[sdptr->mEnd] - mContentOffset;
#ifdef SUNCTL
nsCOMPtr<nsILE> ctlObj;
ctlObj = do_CreateInstance(kLECID, &rv);
if (NS_FAILED(rv)) {
NS_WARNING("Cell based cursor movement will not be supported\n");
ctlObj = nsnull;
}
else {
PRInt32 start, end;
PRBool needsCTL = PR_FALSE;
ctlObj->NeedsCTLFix(text, sdptr->mStart, sdptr->mEnd, &needsCTL);
if (needsCTL && (sdptr->mEnd < textLength)) {
ctlObj->GetRangeOfCluster(text, PRInt32(textLength), sdptr->mEnd,
&start, &end);
if (sdptr->mStart > sdptr->mEnd) /* Left Edge */
sdptr->mEnd = start;
else
sdptr->mEnd = end;
}
/* Always start selection from a Right Edge */
if (needsCTL && (sdptr->mStart > 0)) {
ctlObj->GetRangeOfCluster(text, PRInt32(textLength),
sdptr->mStart, &start, &end);
sdptr->mStart = end;
}
}
#endif /* SUNCTL */
#ifdef IBMBIDI
AdjustSelectionPointsForBidi(sdptr, textLength, CHARTYPE_IS_RTL(charType), isOddLevel, isBidiSystem);
#endif
sdptr = sdptr->mNext;
}
if (!hideStandardSelection || displaySelection) {
/*
* Text is drawn by drawing the entire string every time, but
* using clip regions to control which part of the text is shown
* (selected or unselected.) We do this because you can't
* assume that the layout of a part of text will be the same
* when it's drawn apart from the entire string. This is true
* in languages like arabic, where shaping affects entire words.
* Simply put: length("abcd") != length("ab") + length("cd") in
* some languages.
*/
// See if this rendering backend supports getting cluster
// information.
PRUint32 clusterHint = 0;
aRenderingContext.GetHints(clusterHint);
clusterHint &= NS_RENDERING_HINT_TEXT_CLUSTERS;
//while we have substrings...
//PRBool drawn = PR_FALSE;
DrawSelectionIterator iter(content, details,text,(PRUint32)textLength,aTextStyle, selectionValue, aPresContext, mStyleContext);
if (!iter.IsDone() && iter.First())
{
nscoord currentX = dx;
nscoord newWidth;//temp
#ifdef IBMBIDI // Simon - display substrings RTL in RTL frame
nscoord FrameWidth = 0;
if (isRightToLeftOnBidiPlatform)
if (NS_SUCCEEDED(aRenderingContext.GetWidth(text, textLength, FrameWidth)))
currentX = dx + FrameWidth;
#endif
while (!iter.IsDone())
{
PRUnichar *currenttext = iter.CurrentTextUnicharPtr();
PRUint32 currentlength= iter.CurrentLength();
//TextStyle &currentStyle = iter.CurrentStyle();
nscolor currentFGColor, currentBKColor;
PRBool isCurrentBKColorTransparent;
PRBool isSelection = iter.GetSelectionColors(&currentFGColor,
&currentBKColor,
&isCurrentBKColorTransparent);
if (currentlength > 0)
{
if (clusterHint) {
PRUint32 tmpWidth;
rv = aRenderingContext.GetRangeWidth(text, textLength, currenttext - text,
(currenttext - text) + currentlength,
tmpWidth);
newWidth = nscoord(tmpWidth);
}
else {
rv = aRenderingContext.GetWidth(currenttext, currentlength,newWidth); //ADJUST FOR CHAR SPACING
}
if (NS_SUCCEEDED(rv)) {
if (isRightToLeftOnBidiPlatform)
currentX -= newWidth;
if (isSelection && !isPaginated)
{//DRAW RECT HERE!!!
if (!isCurrentBKColorTransparent) {
aRenderingContext.SetColor(currentBKColor);
aRenderingContext.FillRect(currentX, dy, newWidth, mRect.height);
}
}
}
else {
newWidth = 0;
}
}
else {
newWidth = 0;
}
aRenderingContext.PushState();
nsRect rect(currentX, dy, newWidth, mRect.height);
aRenderingContext.SetClipRect(rect, nsClipCombine_kIntersect);
if (isPaginated && !iter.IsBeforeOrAfter()) {
aRenderingContext.SetColor(nsCSSRendering::TransformColor(aTextStyle.mColor->mColor,canDarkenColor));
aRenderingContext.DrawString(text, PRUint32(textLength), dx, dy + mAscent);
} else if (!isPaginated) {
aRenderingContext.SetColor(nsCSSRendering::TransformColor(currentFGColor,canDarkenColor));
aRenderingContext.DrawString(text, PRUint32(textLength), dx, dy + mAscent);
}
aRenderingContext.PopState();
#ifdef IBMBIDI
if (!isRightToLeftOnBidiPlatform)
#endif
currentX += newWidth; // increment twips X start
iter.Next();
}
}
else if (!isPaginated)
{
aRenderingContext.SetColor(nsCSSRendering::TransformColor(aTextStyle.mColor->mColor,canDarkenColor));
aRenderingContext.DrawString(text, PRUint32(textLength), dx, dy + mAscent);
}
}
PaintTextDecorations(aRenderingContext, aStyleContext, aPresContext,
aTextStyle, dx, dy, width,
isRightToLeftOnBidiPlatform, text, details, 0,
(PRUint32)textLength, nsnull);
sdptr = details;
if (details){
while ((sdptr = details->mNext) != nsnull) {
delete details;
details = sdptr;
}
delete details;
}
}
#ifdef IBMBIDI
if (isRightToLeftOnBidiPlatform) {
// indicate that future text should not be reordered with
// right-to-left base direction
aRenderingContext.SetRightToLeftText(PR_FALSE);
}
#endif // IBMBIDI
}
}
//measure Spaced Textvoid
nsresult
nsTextFrame::GetPositionSlowly(nsPresContext* aPresContext,
nsIRenderingContext* aRendContext,
const nsPoint& aPoint,
nsIContent** aNewContent,
PRInt32& aOffset)
{
// pre-condition tests
NS_PRECONDITION(aPresContext && aRendContext && aNewContent, "null arg");
if (!aPresContext || !aRendContext || !aNewContent) {
return NS_ERROR_NULL_POINTER;
}
// initialize out param
*aNewContent = nsnull;
TextStyle ts(aPresContext, *aRendContext, mStyleContext);
if (!ts.mSmallCaps && !ts.mWordSpacing && !ts.mLetterSpacing && !ts.mJustifying) {
return NS_ERROR_INVALID_ARG;
}
nsIView * view;
nsPoint origin;
GetOffsetFromView(origin, &view);
/* This if clause is the cause of much pain. If aNewContent is set, then any
* code path that returns an error must set aNewContent to null before returning,
* or risk the caller unknowingly decrementing aNewContent inappropriately.
* Here's what Robert O'Callahan has to say on the matter:
If I'm not mistaken, in GetPositionSlowly, the values of aNewContent and
aOffset set in the conditional "if (aPoint.x - origin.x < 0)" are
overwritten on all successful return paths. Since they should never be
used by the caller if the function fails, that entire "if" statement is
--- or should be --- a no-op. Come to think of it, it doesn't make sense
either; setting aOffset to zero is nonsense.
I recommend you just delete that "if" statement.
*
* If this clause is removed, then some of the bullet-proofing code
* prefaced with "bug 56704" comments can be removed as well.
*/
if (aPoint.x - origin.x < 0)
{
*aNewContent = mContent;
aOffset =0;
}
nsIDocument *doc = GetDocument(aPresContext);
// Make enough space to transform
nsAutoTextBuffer paintBuffer;
nsAutoIndexBuffer indexBuffer;
nsresult rv = indexBuffer.GrowTo(mContentLength + 1);
if (NS_FAILED(rv)) {
// If we've already assigned aNewContent, make sure to 0 it out here.
// See bug 56704.
*aNewContent = nsnull;
return rv;
}
// Transform text from content into renderable form
nsTextTransformer tx(doc->GetLineBreaker(), nsnull, aPresContext);
PRInt32 textLength;
PRIntn numJustifiableCharacter;
PrepareUnicodeText(tx, &indexBuffer, &paintBuffer, &textLength, PR_TRUE, &numJustifiableCharacter);
if (textLength <= 0) {
// If we've already assigned aNewContent, make sure to 0 it out here.
// aNewContent is undefined in the case that we return a failure,
// If we were to return a valid pointer, we risk decrementing that node's
// ref count an extra time by the caller.
// See bug 56704 for more details.
*aNewContent = nsnull;
return NS_ERROR_FAILURE;
}
#ifdef IBMBIDI // Simon -- reverse RTL text here
PRBool isOddLevel = NS_GET_EMBEDDING_LEVEL(this) & 1;
if (isOddLevel) {
PRUnichar *tStart, *tEnd;
PRUnichar tSwap;
for (tStart = paintBuffer.mBuffer, tEnd = tStart + textLength - 1; tEnd > tStart; tStart++, tEnd--) {
tSwap = *tStart;
*tStart = *tEnd;
*tEnd = tSwap;
}
}
#endif // IBMBIDI
ComputeExtraJustificationSpacing(*aRendContext, ts, paintBuffer.mBuffer, textLength, numJustifiableCharacter);
//IF STYLE SAYS TO SELECT TO END OF FRAME HERE...
PRInt32 prefInt =
nsContentUtils::GetIntPref("browser.drag_out_of_frame_style");
PRBool outofstylehandled = PR_FALSE;
if (prefInt)
{
if (aPoint.y < origin.y)//above rectangle
{
aOffset = mContentOffset;
outofstylehandled = PR_TRUE;
}
else if ((aPoint.y - origin.y) > mRect.height)
{
aOffset = mContentOffset + mContentLength;
outofstylehandled = PR_TRUE;
}
}
if (!outofstylehandled) //then we drag to closest X point and dont worry about the 'Y'
//END STYLE RULE
{
//the following will first get the index into the PAINTBUFFER then the actual content
nscoord adjustedX = PR_MAX(0,aPoint.x-origin.x);
#ifdef IBMBIDI
if (isOddLevel)
aOffset = mContentOffset + textLength -
GetLengthSlowly(*aRendContext, ts, paintBuffer.mBuffer,
textLength, PR_TRUE, adjustedX);
else
#endif
aOffset = mContentOffset +
GetLengthSlowly(*aRendContext, ts,paintBuffer.mBuffer,
textLength, PR_TRUE, adjustedX);
PRInt32 i;
PRInt32* ip = indexBuffer.mBuffer;
for (i = 0;i <= mContentLength; i ++){
if ((ip[i] >= aOffset) && //reverse mapping
(! IS_LOW_SURROGATE(paintBuffer.mBuffer[ip[i]-mContentOffset]))) {
aOffset = i + mContentOffset;
break;
}
}
}
*aNewContent = mContent;
if (*aNewContent)
(*aNewContent)->AddRef();
return NS_OK;
}
void
nsTextFrame::RenderString(nsIRenderingContext& aRenderingContext,
nsStyleContext* aStyleContext,
nsPresContext* aPresContext,
TextPaintStyle& aTextStyle,
PRBool aRightToLeftText,
PRUnichar* aBuffer, PRInt32 aLength, PRBool aIsEndOfFrame,
nscoord aX, nscoord aY,
nscoord aWidth,
SelectionDetails *aDetails /*=nsnull*/)
{
PRUnichar buf[TEXT_BUF_SIZE];
PRUnichar* bp0 = buf;
nscoord spacingMem[TEXT_BUF_SIZE];
nscoord* sp0 = spacingMem;
PRBool spacing = (0 != aTextStyle.mLetterSpacing) ||
(0 != aTextStyle.mWordSpacing) || aTextStyle.mJustifying;
PRBool justifying = aTextStyle.mJustifying &&
(aTextStyle.mNumJustifiableCharacterReceivingExtraJot != 0 || aTextStyle.mExtraSpacePerJustifiableCharacter != 0);
PRBool isCJ = IsChineseJapaneseLangGroup();
PRBool isEndOfLine = aIsEndOfFrame && IsEndOfLine(mState);
//German 0x00df might expand to "SS", but no need to count it for speed reason
if (aTextStyle.mSmallCaps) {
if (aLength*2 > TEXT_BUF_SIZE) {
bp0 = new PRUnichar[aLength*2];
if (spacing)
sp0 = new nscoord[aLength*2];
}
}
else if (aLength > TEXT_BUF_SIZE) {
bp0 = new PRUnichar[aLength];
if (spacing)
sp0 = new nscoord[aLength];
}
PRUnichar* bp = bp0;
nscoord* sp = sp0;
nsIFontMetrics* lastFont = aTextStyle.mLastFont;
PRInt32 pendingCount;
PRUnichar* runStart = bp;
nscoord charWidth, width = 0;
PRInt32 countSoFar = 0;
// Save the color we want to use for the text, since calls to
// PaintTextDecorations in this method will call SetColor() on the rendering
// context.
nscolor textColor;
aRenderingContext.GetColor(textColor);
for (; --aLength >= 0; aBuffer++) {
nsIFontMetrics* nextFont;
nscoord glyphWidth = 0;
PRUnichar ch = *aBuffer;
if (aTextStyle.mSmallCaps &&
(IsLowerCase(ch) || (ch == kSZLIG))) {
nextFont = aTextStyle.mSmallFont;
}
else {
nextFont = aTextStyle.mNormalFont;
}
if (nextFont != lastFont) {
pendingCount = bp - runStart;
if (0 != pendingCount) {
// Render the text with the color specified first.
aRenderingContext.SetColor(textColor);
// Measure previous run of characters using the previous font
aRenderingContext.DrawString(runStart, pendingCount,
aX, aY + mAscent, -1,
spacing ? sp0 : nsnull);
// Note: use aY not small-y so that decorations are drawn with
// respect to the normal-font not the current font.
PaintTextDecorations(aRenderingContext, aStyleContext, aPresContext,
aTextStyle, aX, aY, width,
aRightToLeftText, runStart, aDetails,
countSoFar, pendingCount, spacing ? sp0 : nsnull);
countSoFar += pendingCount;
aWidth -= width;
aX += width;
runStart = bp = bp0;
sp = sp0;
width = 0;
}
aRenderingContext.SetFont(nextFont);
lastFont = nextFont;
}
if (nextFont == aTextStyle.mSmallFont) {
PRUnichar upper_ch;
// German szlig should be expanded to "SS".
if (ch == kSZLIG)
upper_ch = (PRUnichar)'S';
else
upper_ch = ToUpperCase(ch);
aRenderingContext.GetWidth(upper_ch, charWidth);
glyphWidth += charWidth + aTextStyle.mLetterSpacing;
if (ch == kSZLIG) //add an additional 'S' here.
{
*bp++ = upper_ch;
if (spacing)
*sp++ = glyphWidth;
width += glyphWidth;
}
ch = upper_ch;
}
else if (ch == ' ') {
glyphWidth += aTextStyle.mSpaceWidth + aTextStyle.mWordSpacing + aTextStyle.mLetterSpacing;
}
else if (IS_HIGH_SURROGATE(ch) && aLength > 0 &&
IS_LOW_SURROGATE(*(aBuffer+1))) {
// special handling for surrogate pair
aRenderingContext.GetWidth(aBuffer, 2, charWidth);
glyphWidth += charWidth + aTextStyle.mLetterSpacing;
// copy the surrogate low
*bp++ = ch;
--aLength;
aBuffer++;
ch = *aBuffer;
// put the width into the space buffer
width += glyphWidth;
if (spacing)
*sp++ = glyphWidth;
// set the glyphWidth to 0 so the code later will
// set a 0 for one element in space array for surrogate low to 0
glyphWidth = 0;
}
else {
aRenderingContext.GetWidth(ch, charWidth);
glyphWidth += charWidth + aTextStyle.mLetterSpacing;
}
if (justifying && (!isEndOfLine || aLength > 0)
&& IsJustifiableCharacter(ch, isCJ)) {
glyphWidth += aTextStyle.mExtraSpacePerJustifiableCharacter;
if ((PRUint32)--aTextStyle.mNumJustifiableCharacterToRender
< (PRUint32)aTextStyle.mNumJustifiableCharacterReceivingExtraJot) {
glyphWidth++;
}
}
*bp++ = ch;
if (spacing)
*sp++ = glyphWidth;
width += glyphWidth;
}
pendingCount = bp - runStart;
if (0 != pendingCount) {
// Render the text with the color specified first.
aRenderingContext.SetColor(textColor);
// Measure previous run of characters using the previous font
aRenderingContext.DrawString(runStart, pendingCount, aX, aY + mAscent, -1,
spacing ? sp0 : nsnull);
// Note: use aY not small-y so that decorations are drawn with
// respect to the normal-font not the current font.
PaintTextDecorations(aRenderingContext, aStyleContext, aPresContext,
aTextStyle, aX, aY, aWidth,
aRightToLeftText, runStart, aDetails,
countSoFar, pendingCount, spacing ? sp0 : nsnull);
}
aTextStyle.mLastFont = lastFont;
if (bp0 != buf) {
delete [] bp0;
}
if (sp0 != spacingMem) {
delete [] sp0;
}
}
inline void
nsTextFrame::MeasureSmallCapsText(const nsHTMLReflowState& aReflowState,
TextStyle& aTextStyle,
PRUnichar* aWord,
PRInt32 aWordLength,
PRBool aIsEndOfFrame,
nsTextDimensions* aDimensionsResult)
{
nsIRenderingContext& rc = *aReflowState.rendContext;
aDimensionsResult->Clear();
GetTextDimensions(rc, aTextStyle, aWord, aWordLength, aIsEndOfFrame, aDimensionsResult);
if (aTextStyle.mLastFont != aTextStyle.mNormalFont) {
rc.SetFont(aTextStyle.mNormalFont);
aTextStyle.mLastFont = aTextStyle.mNormalFont;
}
}
PRInt32
nsTextFrame::GetTextDimensionsOrLength(nsIRenderingContext& aRenderingContext,
TextStyle& aStyle,
PRUnichar* aBuffer, PRInt32 aLength, PRBool aIsEndOfFrame,
nsTextDimensions* aDimensionsResult,
PRBool aGetTextDimensions/* true=get dimensions false = return length up to aDimensionsResult.width size*/)
{
PRUnichar *inBuffer = aBuffer;
PRInt32 length = aLength;
nsAutoTextBuffer dimensionsBuffer;
if (NS_FAILED(dimensionsBuffer.GrowTo(length))) {
aDimensionsResult->Clear();
return 0;
}
PRUnichar* bp = dimensionsBuffer.mBuffer;
nsIFontMetrics* lastFont = aStyle.mLastFont;
nsTextDimensions sum, glyphDimensions;
PRBool justifying = aStyle.mJustifying &&
(aStyle.mNumJustifiableCharacterReceivingExtraJot != 0 || aStyle.mExtraSpacePerJustifiableCharacter != 0);
PRBool isCJ = IsChineseJapaneseLangGroup();
PRBool isEndOfLine = aIsEndOfFrame && IsEndOfLine(mState);
for (PRInt32 prevLength = length; --length >= 0; prevLength = length) {
PRUnichar ch = *inBuffer++;
if (aStyle.mSmallCaps &&
(IsLowerCase(ch) || (ch == kSZLIG))) {
PRUnichar upper_ch;
// German szlig should be expanded to "SS".
if (ch == kSZLIG)
upper_ch = (PRUnichar)'S';
else
upper_ch = ToUpperCase(ch);
if (lastFont != aStyle.mSmallFont) {
lastFont = aStyle.mSmallFont;
aRenderingContext.SetFont(lastFont);
}
aRenderingContext.GetTextDimensions(&upper_ch, (PRUint32)1, glyphDimensions);
glyphDimensions.width += aStyle.mLetterSpacing;
if (ch == kSZLIG)
glyphDimensions.width += glyphDimensions.width;
}
else if (ch == ' ') {
glyphDimensions.width = aStyle.mSpaceWidth + aStyle.mLetterSpacing
+ aStyle.mWordSpacing;
}
else {
if (lastFont != aStyle.mNormalFont) {
lastFont = aStyle.mNormalFont;
aRenderingContext.SetFont(lastFont);
}
if (IS_HIGH_SURROGATE(ch) && length > 0 &&
IS_LOW_SURROGATE(*inBuffer)) {
aRenderingContext.GetTextDimensions(inBuffer-1, (PRUint32)2, glyphDimensions);
length--;
inBuffer++;
} else {
aRenderingContext.GetTextDimensions(&ch, (PRUint32)1, glyphDimensions);
}
glyphDimensions.width += aStyle.mLetterSpacing;
}
if (justifying && (!isEndOfLine || length > 0)
&& IsJustifiableCharacter(ch, isCJ)) {
glyphDimensions.width += aStyle.mExtraSpacePerJustifiableCharacter;
if ((PRUint32)--aStyle.mNumJustifiableCharacterToMeasure
< (PRUint32)aStyle.mNumJustifiableCharacterReceivingExtraJot) {
++glyphDimensions.width;
}
}
sum.Combine(glyphDimensions);
*bp++ = ch;
if (!aGetTextDimensions && sum.width >= aDimensionsResult->width) {
PRInt32 result = aLength - length;
if (2*(sum.width - aDimensionsResult->width) > glyphDimensions.width) //then we have gone too far, back up 1
result = aLength - prevLength;
aStyle.mLastFont = lastFont;
return result;
}
}
aStyle.mLastFont = lastFont;
*aDimensionsResult = sum;
return aLength;
}
// XXX factor in logic from RenderString into here; gaps, justification, etc.
void
nsTextFrame::GetTextDimensions(nsIRenderingContext& aRenderingContext,
TextStyle& aTextStyle,
PRUnichar* aBuffer, PRInt32 aLength, PRBool aIsEndOfFrame,
nsTextDimensions* aDimensionsResult)
{
GetTextDimensionsOrLength(aRenderingContext,aTextStyle,
aBuffer,aLength,aIsEndOfFrame,aDimensionsResult,PR_TRUE);
}
PRInt32
nsTextFrame::GetLengthSlowly(nsIRenderingContext& aRenderingContext,
TextStyle& aStyle,
PRUnichar* aBuffer, PRInt32 aLength, PRBool aIsEndOfFrame,
nscoord aWidth)
{
nsTextDimensions dimensions;
dimensions.width = aWidth;
return GetTextDimensionsOrLength(aRenderingContext,aStyle,
aBuffer,aLength,aIsEndOfFrame,&dimensions,PR_FALSE);
}
void
nsTextFrame::ComputeExtraJustificationSpacing(nsIRenderingContext& aRenderingContext,
TextStyle& aTextStyle,
PRUnichar* aBuffer, PRInt32 aLength,
PRInt32 aNumJustifiableCharacter)
{
if (aTextStyle.mJustifying) {
nsTextDimensions trueDimensions;
// OK, so this is a bit ugly. The problem is that to get the right margin
// nice and clean, we have to apply a little extra space to *some* of the
// justifiable characters. It has to be the same ones every time or things will go haywire.
// This implies that the GetTextDimensionsOrLength and RenderString functions depend
// on a little bit of secret state: which part of the prepared text they are
// looking at. It turns out that they get called in a regular way: they look
// at the text from the beginning to the end. So we just count which justifiable character
// we're up to, for each context.
// This is not a great solution, but a perfect solution requires much more
// widespread changes, to explicitly annotate all the transformed text fragments
// that are passed around with their position in the transformed text
// for the entire frame.
aTextStyle.mNumJustifiableCharacterToMeasure = 0;
aTextStyle.mExtraSpacePerJustifiableCharacter = 0;
aTextStyle.mNumJustifiableCharacterReceivingExtraJot = 0;
GetTextDimensions(aRenderingContext, aTextStyle, aBuffer, aLength, PR_TRUE, &trueDimensions);
aTextStyle.mNumJustifiableCharacterToMeasure = aNumJustifiableCharacter;
aTextStyle.mNumJustifiableCharacterToRender = aNumJustifiableCharacter;
nscoord extraSpace = mRect.width - trueDimensions.width;
if (extraSpace > 0 && aNumJustifiableCharacter > 0) {
aTextStyle.mExtraSpacePerJustifiableCharacter = extraSpace/aNumJustifiableCharacter;
aTextStyle.mNumJustifiableCharacterReceivingExtraJot =
extraSpace - aTextStyle.mExtraSpacePerJustifiableCharacter*aNumJustifiableCharacter;
}
}
}
void
nsTextFrame::PaintTextSlowly(nsPresContext* aPresContext,
nsIRenderingContext& aRenderingContext,
nsStyleContext* aStyleContext,
TextPaintStyle& aTextStyle,
nscoord dx, nscoord dy)
{
nsCOMPtr<nsISelectionController> selCon;
nsCOMPtr<nsIPresShell> shell;
PRBool displaySelection;
PRBool isPaginated,canDarkenColor=PR_FALSE;
PRBool isSelected;
PRBool hideStandardSelection;
PRInt16 selectionValue;
nsCOMPtr<nsILineBreaker> lb;
if (NS_FAILED(GetTextInfoForPainting(aPresContext,
aRenderingContext,
getter_AddRefs(shell),
getter_AddRefs(selCon),
displaySelection,
isPaginated,
isSelected,
hideStandardSelection,
selectionValue,
getter_AddRefs(lb)))) {
return;
}
if(isPaginated){
canDarkenColor = CanDarken(aPresContext);
}
// Make enough space to transform
nsAutoTextBuffer paintBuffer;
nsAutoIndexBuffer indexBuffer;
if (NS_FAILED(indexBuffer.GrowTo(mContentLength + 1))) {
return;
}
nscoord width = mRect.width;
PRInt32 textLength;
nsTextTransformer tx(lb, nsnull, aPresContext);
PRIntn numJustifiableCharacter;
PrepareUnicodeText(tx, (displaySelection ? &indexBuffer : nsnull),
&paintBuffer, &textLength, PR_TRUE, &numJustifiableCharacter);
PRInt32* ip = indexBuffer.mBuffer;
PRUnichar* text = paintBuffer.mBuffer;
if (0 != textLength) {
#ifdef IBMBIDI
PRBool isRightToLeftOnBidiPlatform = PR_FALSE;
PRBool isBidiSystem = PR_FALSE;
PRBool isOddLevel = PR_FALSE;
PRUint32 hints = 0;
aRenderingContext.GetHints(hints);
PRBool paintCharByChar = (0 == (hints & NS_RENDERING_HINT_REORDER_SPACED_TEXT)) &&
((0 != aTextStyle.mLetterSpacing) ||
(0 != aTextStyle.mWordSpacing) ||
aTextStyle.mJustifying);
nsCharType charType = eCharType_LeftToRight;
if (aPresContext->BidiEnabled()) {
isBidiSystem = aPresContext->IsBidiSystem();
nsBidiPresUtils* bidiUtils = aPresContext->GetBidiUtils();
if (bidiUtils) {
isOddLevel = NS_GET_EMBEDDING_LEVEL(this) & 1;
charType = (nsCharType)NS_PTR_TO_INT32(aPresContext->PropertyTable()->GetProperty(this, nsLayoutAtoms::charType));
#ifdef DEBUG
PRInt32 rememberTextLength = textLength;
#endif
isRightToLeftOnBidiPlatform = (!paintCharByChar &&
isBidiSystem &&
(eCharType_RightToLeft == charType ||
eCharType_RightToLeftArabic == charType));
if (isRightToLeftOnBidiPlatform) {
// indicate that the platform should use its native
// capabilities to reorder the text with right-to-left
// base direction
aRenderingContext.SetRightToLeftText(PR_TRUE);
}
// If we will be painting char by char, handle the text like on non-bidi platform
bidiUtils->ReorderUnicodeText(text, textLength, charType,
isOddLevel, (paintCharByChar) ? PR_FALSE : isBidiSystem);
NS_ASSERTION(rememberTextLength == textLength, "Bidi formatting changed text length");
}
}
#endif // IBMBIDI
ComputeExtraJustificationSpacing(aRenderingContext, aTextStyle, text, textLength, numJustifiableCharacter);
if (!displaySelection || !isSelected) {
// When there is no selection showing, use the fastest and
// simplest rendering approach
aRenderingContext.SetColor(nsCSSRendering::TransformColor(aTextStyle.mColor->mColor,canDarkenColor));
RenderString(aRenderingContext, aStyleContext, aPresContext, aTextStyle,
PR_FALSE, text, textLength, PR_TRUE, dx, dy, width);
}
else
{
SelectionDetails *details = nsnull;
nsCOMPtr<nsIFrameSelection> frameSelection;
//get the frame selection
nsresult rv = NS_OK;
frameSelection = do_QueryInterface(selCon); //this MAY implement
if (!frameSelection)//if that failed get it from the presshell
frameSelection = shell->FrameSelection();
nsCOMPtr<nsIContent> content;
PRInt32 offset;
PRInt32 length;
rv = GetContentAndOffsetsForSelection(aPresContext,
getter_AddRefs(content),
&offset, &length);
if (NS_SUCCEEDED(rv)) {
rv = frameSelection->LookUpSelection(content, mContentOffset,
mContentLength, &details,
PR_FALSE);
}
//where are the selection points "really"
SelectionDetails *sdptr = details;
while (sdptr){
sdptr->mStart = ip[sdptr->mStart] - mContentOffset;
sdptr->mEnd = ip[sdptr->mEnd] - mContentOffset;
#ifdef IBMBIDI
AdjustSelectionPointsForBidi(sdptr, textLength,
CHARTYPE_IS_RTL(charType), isOddLevel,
(paintCharByChar) ? PR_FALSE : isBidiSystem);
#endif
sdptr = sdptr->mNext;
}
DrawSelectionIterator iter(content, details,text,(PRUint32)textLength,aTextStyle, selectionValue, aPresContext, mStyleContext);
if (!iter.IsDone() && iter.First())
{
nscoord currentX = dx;
nsTextDimensions newDimensions;//temp
#ifdef IBMBIDI // Simon - display substrings RTL in RTL frame
if (isRightToLeftOnBidiPlatform)
{
nsTextDimensions frameDimensions;
GetTextDimensions(aRenderingContext, aTextStyle, text,
(PRInt32)textLength, iter.IsLast(), &frameDimensions);
currentX = dx + frameDimensions.width;
}
#endif
while (!iter.IsDone())
{
PRUnichar *currenttext = iter.CurrentTextUnicharPtr();
PRUint32 currentlength= iter.CurrentLength();
//TextStyle &currentStyle = iter.CurrentStyle();
nscolor currentFGColor, currentBKColor;
PRBool isCurrentBKColorTransparent;
PRBool isSelection = iter.GetSelectionColors(&currentFGColor,
&currentBKColor,
&isCurrentBKColorTransparent);
PRBool isEndOfFrame = iter.IsLast();
GetTextDimensions(aRenderingContext, aTextStyle, currenttext,
(PRInt32)currentlength, isEndOfFrame, &newDimensions);
if (newDimensions.width)
{
#ifdef IBMBIDI
if (isRightToLeftOnBidiPlatform)
currentX -= newDimensions.width;
#endif
if (isSelection && !isPaginated)
{//DRAW RECT HERE!!!
if (!isCurrentBKColorTransparent) {
aRenderingContext.SetColor(currentBKColor);
aRenderingContext.FillRect(currentX, dy, newDimensions.width, mRect.height);
}
}
}
if (isPaginated && !iter.IsBeforeOrAfter()) {
aRenderingContext.SetColor(nsCSSRendering::TransformColor(aTextStyle.mColor->mColor, canDarkenColor));
RenderString(aRenderingContext, aStyleContext, aPresContext,
aTextStyle, isRightToLeftOnBidiPlatform,
currenttext, currentlength, isEndOfFrame,
currentX, dy, newDimensions.width, details);
} else if (!isPaginated) {
aRenderingContext.SetColor(nsCSSRendering::TransformColor(currentFGColor, canDarkenColor));
RenderString(aRenderingContext,aStyleContext, aPresContext,
aTextStyle, isRightToLeftOnBidiPlatform,
currenttext, currentlength, isEndOfFrame,
currentX, dy, newDimensions.width, details);
}
#ifdef IBMBIDI
if (!isRightToLeftOnBidiPlatform)
#endif
// increment twips X start but remember to get ready for
// next draw by reducing current x by letter spacing amount
currentX += newDimensions.width; // + aTextStyle.mLetterSpacing;
iter.Next();
}
}
else if (!isPaginated)
{
aRenderingContext.SetColor(nsCSSRendering::TransformColor(aTextStyle.mColor->mColor,canDarkenColor));
RenderString(aRenderingContext, aStyleContext, aPresContext,
aTextStyle, isRightToLeftOnBidiPlatform, text,
PRUint32(textLength), PR_TRUE, dx, dy, width, details);
}
sdptr = details;
if (details){
while ((sdptr = details->mNext) != nsnull) {
delete details;
details = sdptr;
}
delete details;
}
}
#ifdef IBMBIDI
if (isRightToLeftOnBidiPlatform) {
// indicate that future text should not be reordered with
// right-to-left base direction
aRenderingContext.SetRightToLeftText(PR_FALSE);
}
#endif // IBMBIDI
}
}
void
nsTextFrame::PaintAsciiText(nsPresContext* aPresContext,
nsIRenderingContext& aRenderingContext,
nsStyleContext* aStyleContext,
TextPaintStyle& aTextStyle,
nscoord dx, nscoord dy)
{
NS_PRECONDITION(0 == (TEXT_HAS_MULTIBYTE & mState), "text is multi-byte");
nsCOMPtr<nsISelectionController> selCon;
nsCOMPtr<nsIPresShell> shell;
PRBool displaySelection,canDarkenColor=PR_FALSE;
PRBool isPaginated;
PRBool isSelected;
PRBool hideStandardSelection;
PRInt16 selectionValue;
nsCOMPtr<nsILineBreaker> lb;
if (NS_FAILED(GetTextInfoForPainting(aPresContext,
aRenderingContext,
getter_AddRefs(shell),
getter_AddRefs(selCon),
displaySelection,
isPaginated,
isSelected,
hideStandardSelection,
selectionValue,
getter_AddRefs(lb)))) {
return;
}
if(isPaginated){
canDarkenColor = CanDarken(aPresContext);
}
// Get the text fragment
nsCOMPtr<nsITextContent> tc = do_QueryInterface(mContent);
const nsTextFragment* frag = nsnull;
if (tc) {
frag = tc->Text();
if (!frag) {
return;
}
}
// Make enough space to transform
nsAutoTextBuffer unicodePaintBuffer;
nsAutoIndexBuffer indexBuffer;
if (displaySelection) {
if (NS_FAILED(indexBuffer.GrowTo(mContentLength + 1))) {
return;
}
}
nsTextTransformer tx(lb, nsnull, aPresContext);
// See if we need to transform the text. If the text fragment is ascii and
// wasn't transformed, then we can skip this step. If we're displaying the
// selection and the text is selected, then we need to do this step so we
// can create the index buffer
PRInt32 textLength = 0;
const char* text;
char paintBufMem[TEXT_BUF_SIZE];
char* paintBuf = paintBufMem;
if (frag->Is2b() ||
(0 != (mState & TEXT_WAS_TRANSFORMED)) ||
(displaySelection && isSelected)) {
// Transform text from content into Unicode renderable form
// XXX If the text fragment is ascii, then we should ask the
// text transformer to leave the text in ascii. That way we can
// elimninate the conversion from Unicode back to ascii...
PrepareUnicodeText(tx, (displaySelection ? &indexBuffer : nsnull),
&unicodePaintBuffer, &textLength);
// Translate unicode data into ascii for rendering
if (textLength > TEXT_BUF_SIZE) {
paintBuf = new char[textLength];
if (!paintBuf) {
return;
}
}
char* dst = paintBuf;
char* end = dst + textLength;
PRUnichar* src = unicodePaintBuffer.mBuffer;
while (dst < end) {
*dst++ = (char) ((unsigned char) *src++);
}
text = paintBuf;
}
else if (mContentOffset + mContentLength <= frag->GetLength()) {
text = frag->Get1b() + mContentOffset;
textLength = mContentLength;
// See if we should skip leading whitespace
if (0 != (mState & TEXT_SKIP_LEADING_WS)) {
while ((textLength > 0) && XP_IS_SPACE(*text)) {
text++;
textLength--;
}
}
// See if the text ends in a newline
if ((textLength > 0) && (text[textLength - 1] == '\n')) {
textLength--;
}
NS_ASSERTION(textLength >= 0, "bad text length");
}
else {
// This might happen if a paint event beats the reflow; e.g., as
// is the case in bug 73291. Not a big deal, because the reflow
// will schedule another invalidate.
NS_WARNING("content length exceeds fragment length");
}
nscoord width = mRect.width;
PRInt32* ip = indexBuffer.mBuffer;
if (0 != textLength) {
if (!displaySelection || !isSelected) {
//if selection is > content length then selection has "slid off"
// When there is no selection showing, use the fastest and
// simplest rendering approach
aRenderingContext.SetColor(nsCSSRendering::TransformColor(aTextStyle.mColor->mColor,canDarkenColor));
aRenderingContext.DrawString(text, PRUint32(textLength), dx, dy + mAscent);
PaintTextDecorations(aRenderingContext, aStyleContext,
aPresContext, aTextStyle, dx, dy, width, PR_FALSE);
}
else {
SelectionDetails *details;
nsCOMPtr<nsIFrameSelection> frameSelection;
//get the frame selection
frameSelection = do_QueryInterface(selCon); //this MAY implement
nsresult rv = NS_OK;
if (!frameSelection)//if that failed get it from the presshell
frameSelection = shell->FrameSelection();
nsCOMPtr<nsIContent> content;
PRInt32 offset;
PRInt32 length;
rv = GetContentAndOffsetsForSelection(aPresContext,
getter_AddRefs(content),
&offset, &length);
if (NS_SUCCEEDED(rv)) {
rv = frameSelection->LookUpSelection(content, mContentOffset,
mContentLength, &details,
PR_FALSE);
}
//where are the selection points "really"
SelectionDetails *sdptr = details;
while (sdptr){
sdptr->mStart = ip[sdptr->mStart] - mContentOffset;
sdptr->mEnd = ip[sdptr->mEnd] - mContentOffset;
sdptr = sdptr->mNext;
}
if (!hideStandardSelection || displaySelection) {
//ITS OK TO CAST HERE THE RESULT WE USE WILLNOT DO BAD CONVERSION
DrawSelectionIterator iter(content, details,(PRUnichar *)text,(PRUint32)textLength,aTextStyle,
selectionValue, aPresContext, mStyleContext);
// See if this rendering backend supports getting cluster
// information.
PRUint32 clusterHint = 0;
aRenderingContext.GetHints(clusterHint);
clusterHint &= NS_RENDERING_HINT_TEXT_CLUSTERS;
nscoord foo;
aRenderingContext.GetWidth(text, textLength, foo);
if (!iter.IsDone() && iter.First())
{
nscoord currentX = dx;
nscoord newWidth;//temp
while (!iter.IsDone())
{
char *currenttext = iter.CurrentTextCStrPtr();
PRUint32 currentlength= iter.CurrentLength();
//TextStyle &currentStyle = iter.CurrentStyle();
nscolor currentFGColor, currentBKColor;
PRBool isCurrentBKColorTransparent;
if (clusterHint) {
PRUint32 tmpWidth;
rv = aRenderingContext.GetRangeWidth(text, textLength, currenttext - text,
(currenttext - text) + currentlength,
tmpWidth);
newWidth = nscoord(tmpWidth);
}
else {
rv = aRenderingContext.GetWidth(currenttext, currentlength,newWidth); //ADJUST FOR CHAR SPACING
}
PRBool isSelection = iter.GetSelectionColors(&currentFGColor,
&currentBKColor,
&isCurrentBKColorTransparent);
if (NS_SUCCEEDED(rv)) {
if (isSelection && !isPaginated)
{//DRAW RECT HERE!!!
if (!isCurrentBKColorTransparent) {
aRenderingContext.SetColor(currentBKColor);
aRenderingContext.FillRect(currentX, dy, newWidth, mRect.height);
}
}
}
else {
newWidth =0;
}
aRenderingContext.PushState();
nsRect rect(currentX, dy, newWidth, mRect.height);
aRenderingContext.SetClipRect(rect, nsClipCombine_kIntersect);
if (isPaginated && !iter.IsBeforeOrAfter()) {
aRenderingContext.SetColor(nsCSSRendering::TransformColor(aTextStyle.mColor->mColor,canDarkenColor));
aRenderingContext.DrawString(text, PRUint32(textLength), dx, dy + mAscent);
} else if (!isPaginated) {
aRenderingContext.SetColor(nsCSSRendering::TransformColor(currentFGColor,canDarkenColor));
aRenderingContext.DrawString(text, PRUint32(textLength), dx, dy + mAscent);
}
aRenderingContext.PopState();
currentX+=newWidth;//increment twips X start
iter.Next();
}
}
else if (!isPaginated)
{
aRenderingContext.SetColor(nsCSSRendering::TransformColor(aTextStyle.mColor->mColor,canDarkenColor));
aRenderingContext.DrawString(text, PRUint32(textLength), dx, dy + mAscent);
}
}
PaintTextDecorations(aRenderingContext, aStyleContext, aPresContext,
aTextStyle, dx, dy, width, PR_FALSE,
unicodePaintBuffer.mBuffer,
details, 0, textLength);
sdptr = details;
if (details){
while ((sdptr = details->mNext) != nsnull) {
delete details;
details = sdptr;
}
delete details;
}
}
}
// Cleanup
if (paintBuf != paintBufMem) {
delete [] paintBuf;
}
}
//---------------------------------------------------
// Also defined for external use in nsTextFrame.h
//
// Uses a binary search for find where the cursor falls in the line of text
// It also keeps track of the part of the string that has already been measured
// so it doesn't have to keep measuring the same text over and over
//
// Param "aBaseWidth" contains the width in twips of the portion
// of the text that has already been measured, and aBaseInx contains
// the index of the text that has already been measured.
//
// aTextWidth returns the (in twips) the length of the text that falls before the cursor
// aIndex contains the index of the text where the cursor falls
PRBool
BinarySearchForPosition(nsIRenderingContext* aRendContext,
const PRUnichar* aText,
PRInt32 aBaseWidth,
PRInt32 aBaseInx,
PRInt32 aStartInx,
PRInt32 aEndInx,
PRInt32 aCursorPos,
PRInt32& aIndex,
PRInt32& aTextWidth)
{
PRInt32 range = aEndInx - aStartInx;
if ((range == 1) || (range == 2 && IS_HIGH_SURROGATE(aText[aStartInx]))) {
aIndex = aStartInx + aBaseInx;
aRendContext->GetWidth(aText, aIndex, aTextWidth);
return PR_TRUE;
}
PRInt32 inx = aStartInx + (range / 2);
// Make sure we don't leave a dangling low surrogate
if (IS_HIGH_SURROGATE(aText[inx-1]))
inx++;
PRInt32 textWidth = 0;
aRendContext->GetWidth(aText, inx, textWidth);
PRInt32 fullWidth = aBaseWidth + textWidth;
if (fullWidth == aCursorPos) {
aTextWidth = textWidth;
aIndex = inx;
return PR_TRUE;
} else if (aCursorPos < fullWidth) {
aTextWidth = aBaseWidth;
if (BinarySearchForPosition(aRendContext, aText, aBaseWidth, aBaseInx, aStartInx, inx, aCursorPos, aIndex, aTextWidth)) {
return PR_TRUE;
}
} else {
aTextWidth = fullWidth;
if (BinarySearchForPosition(aRendContext, aText, aBaseWidth, aBaseInx, inx, aEndInx, aCursorPos, aIndex, aTextWidth)) {
return PR_TRUE;
}
}
return PR_FALSE;
}
//---------------------------------------------------------------------------
// Uses a binary search to find the position of the cursor in the text.
// The "indices array is used to map from the compressed text back to the
// un-compressed text, selection is based on the un-compressed text, the visual
// display of selection is based on the compressed text.
//---------------------------------------------------------------------------
NS_IMETHODIMP
nsTextFrame::GetPosition(nsPresContext* aPresContext,
const nsPoint& aPoint,
nsIContent ** aNewContent,
PRInt32& aContentOffset,
PRInt32& aContentOffsetEnd)
{
// pre-condition tests
NS_PRECONDITION(aPresContext && aNewContent, "null arg");
if (!aPresContext || !aNewContent) {
return NS_ERROR_NULL_POINTER;
}
// initialize out param
*aNewContent = nsnull;
DEBUG_VERIFY_NOT_DIRTY(mState);
if (mState & NS_FRAME_IS_DIRTY)
return NS_ERROR_UNEXPECTED;
nsIPresShell *shell = aPresContext->GetPresShell();
if (shell) {
nsCOMPtr<nsIRenderingContext> rendContext;
nsresult rv = shell->CreateRenderingContext(this, getter_AddRefs(rendContext));
if (NS_SUCCEEDED(rv)) {
TextStyle ts(aPresContext, *rendContext, mStyleContext);
if (ts.mSmallCaps || ts.mWordSpacing || ts.mLetterSpacing || ts.mJustifying) {
nsresult result = GetPositionSlowly(aPresContext, rendContext, aPoint, aNewContent,
aContentOffset);
aContentOffsetEnd = aContentOffset;
return result;
}
// Make enough space to transform
nsAutoTextBuffer paintBuffer;
nsAutoIndexBuffer indexBuffer;
rv = indexBuffer.GrowTo(mContentLength + 1);
if (NS_FAILED(rv)) {
return rv;
}
// Find the font metrics for this text
SetFontFromStyle(rendContext, mStyleContext);
// Get the renderable form of the text
nsIDocument *doc = GetDocument(aPresContext);
nsTextTransformer tx(doc->GetLineBreaker(), nsnull, aPresContext);
PRInt32 textLength;
// no need to worry about justification, that's always on the slow path
PrepareUnicodeText(tx, &indexBuffer, &paintBuffer, &textLength);
nsPoint origin;
nsIView * view;
GetOffsetFromView(origin, &view);
//IF STYLE SAYS TO SELECT TO END OF FRAME HERE...
PRInt32 prefInt =
nsContentUtils::GetIntPref("browser.drag_out_of_frame_style");
PRBool outofstylehandled = PR_FALSE;
if (prefInt)
{
if ((aPoint.y - origin.y) < 0)//above rectangle
{
aContentOffset = mContentOffset;
aContentOffsetEnd = aContentOffset;
outofstylehandled = PR_TRUE;
}
else if ((aPoint.y - origin.y) > mRect.height)
{
aContentOffset = mContentOffset + mContentLength;
aContentOffsetEnd = aContentOffset;
outofstylehandled = PR_TRUE;
}
}
if (textLength <= 0) {
aContentOffset = mContentOffset;
aContentOffsetEnd = aContentOffset;
}
else if (!outofstylehandled) //then we need to track based on the X coord only
{
//END STYLE IF
PRInt32* ip = indexBuffer.mBuffer;
PRInt32 indx;
PRInt32 textWidth = 0;
PRUnichar* text = paintBuffer.mBuffer;
// See if the font backend will do all the hard work for us.
PRUint32 clusterHint = 0;
rendContext->GetHints(clusterHint);
clusterHint &= NS_RENDERING_HINT_TEXT_CLUSTERS;
if (clusterHint) {
nsPoint pt;
pt.x = aPoint.x - origin.x;
pt.y = aPoint.y - origin.y;
indx = rendContext->GetPosition(text, textLength, pt);
}
else {
#ifdef IBMBIDI
PRBool getReversedPos = NS_GET_EMBEDDING_LEVEL(this) & 1;
nscoord posX = (getReversedPos) ?
(mRect.width + origin.x) - (aPoint.x - origin.x) : aPoint.x;
PRBool found = BinarySearchForPosition(rendContext, text, origin.x, 0, 0,
PRInt32(textLength),
PRInt32(posX) , //go to local coordinates
indx, textWidth);
#else
PRBool found = BinarySearchForPosition(rendContext, text, origin.x, 0, 0,
PRInt32(textLength),
PRInt32(aPoint.x) , //go to local coordinates
indx, textWidth);
#endif // IBMBIDI
if (found) {
PRInt32 charWidth;
if (IS_HIGH_SURROGATE(text[indx]))
rendContext->GetWidth(&text[indx], 2, charWidth);
else
rendContext->GetWidth(text[indx], charWidth);
charWidth /= 2;
#ifdef IBMBIDI
if (getReversedPos) {
if (mRect.width - aPoint.x + origin.x > textWidth+charWidth ) {
indx++;
}
}
else
#endif // IBMBIDI
if ((aPoint.x - origin.x) > textWidth+charWidth) {
indx++;
}
}
}
aContentOffset = indx + mContentOffset;
//reusing wordBufMem
PRInt32 i;
for (i = 0; i < mContentLength; i ++){
if ((ip[i] >= aContentOffset) && //reverse mapping
(! IS_LOW_SURROGATE(paintBuffer.mBuffer[ip[i]-mContentOffset]))) {
break;
}
}
aContentOffset = i + mContentOffset;
#ifdef IBMBIDI
PRInt32 bidiStopOffset = mContentOffset + mContentLength;
if (aContentOffset >= mContentOffset && aContentOffset < bidiStopOffset) {
PRInt32 curindx = ip[aContentOffset - mContentOffset] - mContentOffset;
while (curindx < textLength && IS_BIDI_DIACRITIC(text[curindx])) {
if (++aContentOffset >= bidiStopOffset)
break;
curindx = ip[aContentOffset - mContentOffset] - mContentOffset;
}
}
#endif // IBMBIDI
aContentOffsetEnd = aContentOffset;
NS_ASSERTION(i<= mContentLength, "offset we got from binary search is messed up");
}
*aNewContent = mContent;
if (*aNewContent) {
(*aNewContent)->AddRef();
}
}
}
return NS_OK;
}
NS_IMETHODIMP
nsTextFrame::GetContentAndOffsetsFromPoint(nsPresContext* aPresContext,
const nsPoint& aPoint,
nsIContent ** aNewContent,
PRInt32& aContentOffset,
PRInt32& aContentOffsetEnd,
PRBool& aBeginFrameContent)
{
if (!aNewContent)
return NS_ERROR_NULL_POINTER;
*aNewContent = nsnull;//initialize
aContentOffset = 0;
aContentOffsetEnd = 0;
aBeginFrameContent = 0;
DEBUG_VERIFY_NOT_DIRTY(mState);
if (mState & NS_FRAME_IS_DIRTY)
return NS_ERROR_UNEXPECTED;
nsPoint newPoint;
newPoint.y = aPoint.y;
if (aPoint.x < 0)
newPoint.x = 0;
else
newPoint.x = aPoint.x;
nsresult rv = GetPosition(aPresContext, newPoint, aNewContent, aContentOffset, aContentOffsetEnd);
if (NS_FAILED(rv))
return rv;
if (aContentOffset == mContentOffset)
aBeginFrameContent = PR_TRUE;
else
aBeginFrameContent = PR_FALSE;
return rv;
}
// [HACK] Foward Declarations
void ForceDrawFrame(nsFrame * aFrame);
//null range means the whole thing
NS_IMETHODIMP
nsTextFrame::SetSelected(nsPresContext* aPresContext,
nsIDOMRange *aRange,
PRBool aSelected,
nsSpread aSpread)
{
if (aSelected && ParentDisablesSelection())
return NS_OK;
#if 0
PRBool isSelected = ((GetStateBits() & NS_FRAME_SELECTED_CONTENT) == NS_FRAME_SELECTED_CONTENT);
if (!aSelected && !isSelected) //already set thanks
{
return NS_OK;
}
#endif
// check whether style allows selection
PRBool selectable;
IsSelectable(&selectable, nsnull);
if (!selectable)
return NS_OK;//do not continue no selection for this frame.
PRBool found = PR_FALSE;
if (aRange) {
//lets see if the range contains us, if so we must redraw!
nsCOMPtr<nsIDOMNode> endNode;
PRInt32 endOffset;
nsCOMPtr<nsIDOMNode> startNode;
PRInt32 startOffset;
aRange->GetEndContainer(getter_AddRefs(endNode));
aRange->GetEndOffset(&endOffset);
aRange->GetStartContainer(getter_AddRefs(startNode));
aRange->GetStartOffset(&startOffset);
nsCOMPtr<nsIDOMNode> thisNode = do_QueryInterface(GetContent());
if (thisNode == startNode)
{
if ((mContentOffset + mContentLength) >= startOffset)
{
found = PR_TRUE;
if (thisNode == endNode)
{ //special case
if (endOffset == startOffset) //no need to redraw since drawing takes place with cursor
found = PR_FALSE;
if (mContentOffset > endOffset)
found = PR_FALSE;
}
}
}
else if (thisNode == endNode)
{
if (mContentOffset < endOffset)
found = PR_TRUE;
else
{
found = PR_FALSE;
}
}
else
{
found = PR_TRUE;
}
}
else {
// null range means the whole thing
found = PR_TRUE;
}
if ( aSelected )
AddStateBits(NS_FRAME_SELECTED_CONTENT);
else
{//we need to see if any other selection available.
SelectionDetails *details = nsnull;
nsCOMPtr<nsIFrameSelection> frameSelection;
nsIPresShell *shell = aPresContext->GetPresShell();
if (shell) {
nsCOMPtr<nsISelectionController> selCon;
nsresult rv = GetSelectionController(aPresContext,
getter_AddRefs(selCon));
if (NS_SUCCEEDED(rv) && selCon)
{
frameSelection = do_QueryInterface(selCon); //this MAY implement
}
if (!frameSelection)
frameSelection = shell->FrameSelection();
nsCOMPtr<nsIContent> content;
PRInt32 offset;
PRInt32 length;
rv = GetContentAndOffsetsForSelection(aPresContext,
getter_AddRefs(content),
&offset, &length);
if (NS_SUCCEEDED(rv) && content) {
rv = frameSelection->LookUpSelection(content, offset,
length, &details, PR_TRUE);
// PR_TRUE last param used here! we need to see if we are still selected. so no shortcut
}
}
if (!details)
RemoveStateBits(NS_FRAME_SELECTED_CONTENT);
else
{
SelectionDetails *sdptr = details;
while ((sdptr = details->mNext) != nsnull) {
delete details;
details = sdptr;
}
delete details;
}
}
if (found){ //if range contains this frame...
// Selection might change our border, content and outline appearance
// But textframes can't have an outline. So just use the simple
// bounds
Invalidate(nsRect(0, 0, mRect.width, mRect.height), PR_FALSE);
}
if (aSpread == eSpreadDown)
{
nsIFrame* frame = GetPrevInFlow();
while(frame){
frame->SetSelected(aPresContext, aRange,aSelected,eSpreadNone);
frame = frame->GetPrevInFlow();
}
frame = GetNextInFlow();
while (frame){
frame->SetSelected(aPresContext, aRange,aSelected,eSpreadNone);
frame = frame->GetNextInFlow();
}
#ifdef IBMBIDI
if ((mState & NS_FRAME_IS_BIDI) &&
(frame = NS_STATIC_CAST(nsIFrame*,
aPresContext->PropertyTable()->GetProperty(this, nsLayoutAtoms::nextBidi)))) {
frame->SetSelected(aPresContext, aRange, aSelected, aSpread);
}
#endif // IBMBIDI
}
return NS_OK;
}
NS_IMETHODIMP
nsTextFrame::GetPointFromOffset(nsPresContext* aPresContext,
nsIRenderingContext* inRendContext,
PRInt32 inOffset,
nsPoint* outPoint)
{
if (!aPresContext || !inRendContext || !outPoint)
return NS_ERROR_NULL_POINTER;
outPoint->x = 0;
outPoint->y = 0;
DEBUG_VERIFY_NOT_DIRTY(mState);
if (mState & NS_FRAME_IS_DIRTY)
return NS_ERROR_UNEXPECTED;
if (mContentLength <= 0) {
return NS_OK;
}
inOffset-=mContentOffset;
if (inOffset < 0){
NS_ASSERTION(0,"offset less than this frame has in GetPointFromOffset");
inOffset = 0;
}
if (inOffset >= mContentLength)
inOffset = mContentLength;
TextStyle ts(aPresContext, *inRendContext, mStyleContext);
// Make enough space to transform
nsAutoTextBuffer paintBuffer;
nsAutoIndexBuffer indexBuffer;
nsresult rv = indexBuffer.GrowTo(mContentLength + 1);
if (NS_FAILED(rv)) {
return rv;
}
// Transform text from content into renderable form
nsIDocument *doc = GetDocument(aPresContext);
nsTextTransformer tx(doc->GetLineBreaker(), nsnull, aPresContext);
PRInt32 textLength;
PRIntn numJustifiableCharacter;
PrepareUnicodeText(tx, &indexBuffer, &paintBuffer, &textLength, PR_FALSE, &numJustifiableCharacter);
ComputeExtraJustificationSpacing(*inRendContext, ts, paintBuffer.mBuffer, textLength, numJustifiableCharacter);
PRInt32* ip = indexBuffer.mBuffer;
if (inOffset > mContentLength){
NS_ASSERTION(0, "invalid offset passed to GetPointFromOffset");
inOffset = mContentLength;
}
while (inOffset >=0 && ip[inOffset] < mContentOffset) //buffer has shrunk
inOffset --;
nscoord width = mRect.width;
if (inOffset <0)
{
NS_ASSERTION(0, "invalid offset passed to GetPointFromOffset");
inOffset=0;
width = 0;
}
else
{
PRInt32 hitLength = ip[inOffset] - mContentOffset;
if (ts.mSmallCaps || (0 != ts.mWordSpacing) || (0 != ts.mLetterSpacing) || ts.mJustifying)
{
nsTextDimensions dimensions;
GetTextDimensions(*inRendContext, ts, paintBuffer.mBuffer, hitLength,
textLength == hitLength, &dimensions);
width = dimensions.width;
}
else
{
PRInt32 totalLength = 0; // length up to the last-in-flow frame
nsCOMPtr<nsITextContent> tc(do_QueryInterface(mContent));
if (tc) {
totalLength = tc->Text()->GetLength(); // raw value which includes whitespace
}
if ((hitLength == textLength) && (inOffset = mContentLength) &&
(mContentOffset + mContentLength == totalLength)) {
// no need to re-measure when at the end of the last-in-flow
}
else
inRendContext->GetWidth(paintBuffer.mBuffer, hitLength, width);
}
if ((hitLength == textLength) && (TEXT_TRIMMED_WS & mState)) {
//
// Offset must be after a space that has
// been trimmed off the end of the frame.
// Add the width of the trimmed space back
// to the total width, so the caret appears
// in the proper place!
//
// NOTE: the trailing whitespace includes the word and letter spacing!!
width += ts.mSpaceWidth + ts.mWordSpacing + ts.mLetterSpacing;
}
}
#ifdef IBMBIDI
if (NS_GET_EMBEDDING_LEVEL(this) & 1) {
if (width > mRect.width)
outPoint->x = 0;
else
outPoint->x = mRect.width - width;
}
else
#endif // IBMBIDI
//XXX callers need to safeguard themselves against empty frames, I noted that
//the caret can be locked when leftarrow'ing in: <span>...</span>\n<br>line
if (width > mRect.width)
outPoint->x = mRect.width;
else
outPoint->x = width;
outPoint->y = 0;
return NS_OK;
}
NS_IMETHODIMP
nsTextFrame::GetChildFrameContainingOffset(PRInt32 inContentOffset,
PRBool inHint,
PRInt32* outFrameContentOffset,
nsIFrame **outChildFrame)
{
if (nsnull == outChildFrame)
return NS_ERROR_NULL_POINTER;
PRInt32 contentOffset = inContentOffset;
if (contentOffset != -1) //-1 signified the end of the current content
contentOffset = inContentOffset - mContentOffset;
if ((contentOffset > mContentLength) || ((contentOffset == mContentLength) && inHint) )
{
//this is not the frame we are looking for.
nsIFrame* nextInFlow = GetNextInFlow();
if (nextInFlow)
{
return nextInFlow->GetChildFrameContainingOffset(inContentOffset, inHint, outFrameContentOffset, outChildFrame);
}
else {
#ifdef IBMBIDI // Simon
// There is no nextInFlow - check if there is a bidi
// continuation frame
if (mState & NS_FRAME_IS_BIDI)
{
nsIFrame *nextBidi = GetNextSibling();
if (nextBidi)
{
PRInt32 start, end;
if (NS_SUCCEEDED(nextBidi->GetOffsets(start, end)) && start > 0)
{
return nextBidi->GetChildFrameContainingOffset(inContentOffset,
inHint, outFrameContentOffset, outChildFrame);
}
}
}
#endif // IBMBIDI
{
if (contentOffset != mContentLength) //that condition was only for when there is a choice
return NS_ERROR_FAILURE;
}
}
}
if (inContentOffset < mContentOffset) //could happen with floats!
{
*outChildFrame = GetPrevInFlow();
if (*outChildFrame)
return (*outChildFrame)->GetChildFrameContainingOffset(inContentOffset, inHint,
outFrameContentOffset,outChildFrame);
else
return NS_OK; //this can't be the right thing to do?
}
*outFrameContentOffset = contentOffset;
*outChildFrame = this;
return NS_OK;
}
NS_IMETHODIMP
nsTextFrame::PeekOffset(nsPresContext* aPresContext, nsPeekOffsetStruct *aPos)
{
DEBUG_VERIFY_NOT_DIRTY(mState);
if (mState & NS_FRAME_IS_DIRTY)
return NS_ERROR_UNEXPECTED;
#ifdef IBMBIDI
// XXX TODO: - this explanation may not be accurate
// - need to better explain what aPos->mPreferLeft means
// for two frames on the same line
// - need to better explain for what happens when you move
// from the end of a line to the beginning of the next
// despite not making a move logically within the text.
// - need to explain why XORing with the embedding level
// achieves the desired effect
//
// When you move your caret by in some visual direction, and you find the
// new position is at the edge of a line (beginning or end), you usually
// want to stay on the current line rather than move to the next or the
// previous one; however, if you want to get to the edge of the next or
// the previous word (i.e. you're 'eating white space' when moving
// between words), and you couldn't find the word in the current line,
// you do _not_ want to stay on the current line - you want to get to that
// word.
//
// When your frames are ordered the same way logically as they are
// visually (e.g. when they're frames of LTR text displayed in
// left-then-down order), this translates to terms of 'prefer left' or
// 'prefer right', i.e. if you move to the left and hit the beginning of
// the line you have to choose between the frame "on the left" - the last
// frame on the previous line - and the frame "on the right" - the
// first frame of the current line.
//
// When the frames are displayed in right-then-down order (i.e. frames
// within an RTL line), the last sentence remains correct, but now
// the directions are reversed - if you're moving left, you hit the end
// of a line; the frame closer to your original position is the one
// "on the right" - the last frame on the current line - rather than the
// one "on the left" - the first frame on the next
// line.
//
// Now, it seems the PeekOffset() method does not _use_ the mPreferLeft
// value, but it does _set_ it for the caller, and this must be done
// consistently along calls to PeekOffset of nsTextFrames on the _same_
// line as well as on different lines.
//
// Note:
// eDirPrevious actually means 'in the visual left-then-down direction'
// eDirNext actually means 'in the visual right-then-down direction'
// (this is again due to the LTRish bias of the nomenclature)
PRBool isOddLevel = NS_GET_EMBEDDING_LEVEL(this) & 1;
if ((eSelectCharacter == aPos->mAmount)
|| (eSelectWord == aPos->mAmount))
// this 'flip' will be in effect only for this frame, not
// for recursive calls to PeekOffset()
aPos->mPreferLeft ^= isOddLevel;
#endif
if (!aPos || !mContent)
return NS_ERROR_NULL_POINTER;
// XXX TODO: explain this policy; why the assymetry between
// too high and too low start offsets?
//
// There are 4 possible ranges of aPos->mStartOffset:
//
// 0 mContentOffset mContentOffset+mContentLength
// | | |
// range #1 | range #2 | range #3 | range #4
// ***************
// our frame's part
// of the content
//
// Range Policy
// ------------------------------------------------------------------------
// #1 Assume the start position is at the end of the content of 'this'
// #2 Round up the position to the beginning of our frame
// #3 No change necessary
// #4 Delegate the PeekOffset() to the next frame (according
// to the direction, either to our left or our right)
//
// Note: the diagram above is drawn left-to-right, but advancing
// in the content may sometimes mean going right-to-left
if (aPos->mStartOffset < 0 )
aPos->mStartOffset = mContentLength + mContentOffset;
if (aPos->mStartOffset < mContentOffset){
aPos->mStartOffset = mContentOffset;
}
if (aPos->mStartOffset > (mContentOffset + mContentLength)){
nsIFrame *nextInFlow;
#ifdef IBMBIDI
if (isOddLevel) {
nextInFlow = NS_STATIC_CAST(nsIFrame*,
aPresContext->PropertyTable()->GetProperty(this,
nsLayoutAtoms::nextBidi));
}
else
#endif
nextInFlow = GetNextInFlow();
if (!nextInFlow){
NS_ASSERTION(PR_FALSE,"nsTextFrame::PeekOffset no more flow \n");
return NS_ERROR_INVALID_ARG;
}
// undoing the RTL flipping of mPreferLeft for the delegation
// to the next frame
if ((eSelectCharacter == aPos->mAmount)
|| (eSelectWord == aPos->mAmount))
aPos->mPreferLeft ^= isOddLevel;
return nextInFlow->PeekOffset(aPresContext, aPos);
}
// XXX TODO: explain the following:
// - if this frame is the first of the last in the line according
// to the content indices, why not handle the cases of
// eSelectBeginLine/eSelectEndLine
// - why can't we make the hand-off to the parent class' method
// before the of aPos->mStartOffset and aPos->mPreferLeft?
if (aPos->mAmount == eSelectLine || aPos->mAmount == eSelectBeginLine
|| aPos->mAmount == eSelectEndLine || aPos->mAmount == eSelectParagraph)
{
return nsFrame::PeekOffset(aPresContext, aPos);
}
nsAutoTextBuffer paintBuffer;
nsAutoIndexBuffer indexBuffer;
nsresult rv = indexBuffer.GrowTo(mContentLength + 1);
if (NS_FAILED(rv)) {
return rv;
}
PRInt32* ip = indexBuffer.mBuffer;
PRInt32 textLength;
nsresult result(NS_ERROR_FAILURE);
aPos->mResultContent = mContent;//do this right off
switch (aPos->mAmount){
case eSelectNoAmount:
{
// Transform text from content into renderable form
nsIDocument* doc = mContent->GetDocument();
if (!doc) {
return NS_OK;
}
nsTextTransformer tx(doc->GetLineBreaker(), nsnull, aPresContext);
PrepareUnicodeText(tx, &indexBuffer, &paintBuffer, &textLength);
if (textLength)//if no renderable length, you cant park here.
{
aPos->mContentOffset = aPos->mStartOffset;
result = NS_OK;
}
else
{
aPos->mAmount = eSelectDir;//go to "next" or previous frame based on direction not THIS frame
result = GetFrameFromDirection(aPresContext, aPos);
if (NS_SUCCEEDED(result) && aPos->mResultFrame && aPos->mResultFrame!= this)
return aPos->mResultFrame->PeekOffset(aPresContext, aPos);
else if (NS_FAILED(result))
return result;
}
}
break;
case eSelectCharacter:
{
// Transform text from content into renderable form
nsIDocument* doc = mContent->GetDocument();
if (!doc) {
return NS_OK;
}
nsTextTransformer tx(doc->GetLineBreaker(), nsnull, aPresContext);
PrepareUnicodeText(tx, &indexBuffer, &paintBuffer, &textLength);
nsIFrame *frameUsed = nsnull;
PRInt32 start;
PRBool found = PR_TRUE;
PRBool selectable;
PRUint8 selectStyle;
IsSelectable(&selectable, &selectStyle);
if ( selectStyle == NS_STYLE_USER_SELECT_ALL )
found = PR_FALSE;
else
{
#ifdef IBMBIDI // Simon - RTL frames reverse meaning of previous and next
// so that right arrow always moves to the right on screen
// and left arrow always moves left
if ( ((aPos->mDirection == eDirPrevious) && !isOddLevel) ||
((aPos->mDirection == eDirNext) && isOddLevel) ){
#else
if (aPos->mDirection == eDirPrevious){
#endif
aPos->mContentOffset = 0;
PRInt32 i;
nsAutoPRUint8Buffer clusterBuffer;
rv = FillClusterBuffer(aPresContext, paintBuffer.mBuffer,
(PRUint32)textLength, clusterBuffer);
NS_ENSURE_SUCCESS(rv, rv);
for (i = aPos->mStartOffset -1 - mContentOffset; i >=0; i--){
if ((ip[i] < ip[aPos->mStartOffset - mContentOffset]) &&
(clusterBuffer.mBuffer[ip[i] - mContentOffset]) &&
(! IS_LOW_SURROGATE(paintBuffer.mBuffer[ip[i]-mContentOffset])))
{
aPos->mContentOffset = i + mContentOffset;
break;
}
}
#ifdef SUNCTL
static NS_DEFINE_CID(kLECID, NS_ULE_CID);
nsCOMPtr<nsILE> ctlObj;
ctlObj = do_CreateInstance(kLECID, &rv);
if (NS_FAILED(rv)) {
NS_WARNING("Cell based cursor movement will not be supported\n");
ctlObj = nsnull;
}
else {
PRBool needsCTL = PR_FALSE;
PRInt32 previousOffset;
ctlObj->NeedsCTLFix(NS_REINTERPRET_CAST(const PRUnichar*,
paintBuffer.mBuffer),
aPos->mStartOffset, -1, &needsCTL);
if (needsCTL) {
ctlObj->PrevCluster(NS_REINTERPRET_CAST(const PRUnichar*,
paintBuffer.mBuffer),
textLength,aPos->mStartOffset,
&previousOffset);
aPos->mContentOffset = i = previousOffset;
}
}
#endif /* SUNCTL */
if (i <0){
found = PR_FALSE;
frameUsed = GetPrevInFlow();
start = mContentOffset;
aPos->mContentOffset = start;//in case next call fails we stop at this offset
}
}
#ifdef IBMBIDI // Simon, as above
else if ( ((aPos->mDirection == eDirNext) && !isOddLevel) ||
((aPos->mDirection == eDirPrevious) && isOddLevel) ){
#else
else if (aPos->mDirection == eDirNext){
#endif
PRInt32 i;
aPos->mContentOffset = mContentLength;
nsAutoPRUint8Buffer clusterBuffer;
rv = FillClusterBuffer(aPresContext, paintBuffer.mBuffer,
(PRUint32)textLength, clusterBuffer);
NS_ENSURE_SUCCESS(rv, rv);
for (i = aPos->mStartOffset - mContentOffset; i <= mContentLength; i++) {
if ((ip[i] > ip[aPos->mStartOffset - mContentOffset]) &&
((i == mContentLength) ||
(!IS_LOW_SURROGATE(paintBuffer.mBuffer[ip[i] - mContentOffset])) &&
(clusterBuffer.mBuffer[ip[i] - mContentOffset]))) {
aPos->mContentOffset = i + mContentOffset;
break;
}
}
#ifdef SUNCTL
static NS_DEFINE_CID(kLECID, NS_ULE_CID);
nsCOMPtr<nsILE> ctlObj;
ctlObj = do_CreateInstance(kLECID, &rv);
if (NS_FAILED(rv)) {
NS_WARNING("Cell based cursor movement will not be supported\n");
ctlObj = nsnull;
}
else {
PRBool needsCTL = PR_FALSE;
PRInt32 nextOffset;
ctlObj->NeedsCTLFix(NS_REINTERPRET_CAST(const PRUnichar*,
paintBuffer.mBuffer),
aPos->mStartOffset, 0, &needsCTL);
if (needsCTL) {
ctlObj->NextCluster(NS_REINTERPRET_CAST(const PRUnichar*,
paintBuffer.mBuffer),
textLength, aPos->mStartOffset,
&nextOffset);
aPos->mContentOffset = i = nextOffset;
}
}
#endif /* SUNCTL */
/* if (aStartOffset == 0 && (mState & TEXT_SKIP_LEADING_WS))
i--; //back up because we just skipped over some white space. why skip over the char also?
*/
if (i > mContentLength){
found = PR_FALSE;
// XXX TODO: explain why in this case GetNextInFlow() is good enough,
// but in the case of
// aPos->mStartOffset > (mContentOffset + mContentLength)
// above, we use the presentation context and get the 'nextBidi'
frameUsed = GetNextInFlow();
start = mContentOffset + mContentLength;
aPos->mContentOffset = start;//in case next call fails we stop at this offset
}
}
}
if (!found)
{
result = GetFrameFromDirection(aPresContext, aPos);
if (NS_SUCCEEDED(result) && aPos->mResultFrame && aPos->mResultFrame!= this)
{
// undoing the RTL flipping of mPreferLeft in the case where
// the inner call will do it itself;
// note that mAmount, as well as mPreferLeft might have been modified
// by the call to GetFrameFromDirection (if we are moving to another line)
if (eSelectCharacter == aPos->mAmount)
aPos->mPreferLeft ^= isOddLevel;
result = aPos->mResultFrame->PeekOffset(aPresContext, aPos);
if (NS_FAILED(result))
return result;
}
}
else
aPos->mResultContent = mContent;
}
break;
case eSelectWord:
{
// Transform text from content into renderable form
nsIDocument* doc = mContent->GetDocument();
if (!doc) {
return result;
}
nsTextTransformer tx(doc->GetLineBreaker(),
doc->GetWordBreaker(), aPresContext);
PrepareUnicodeText(tx, &indexBuffer, &paintBuffer, &textLength);
nsIFrame *frameUsed = nsnull;
PRBool keepSearching; //if you run out of chars before you hit the end of word, maybe next frame has more text to select?
PRInt32 start;
PRBool found = PR_FALSE;
PRBool isWhitespace, wasTransformed;
PRInt32 wordLen, contentLen;
PRBool wordSelectEatSpaceAfter = tx.GetWordSelectEatSpaceAfter();
PRBool selectable;
PRUint8 selectStyle;
IsSelectable(&selectable, &selectStyle);
if ( selectStyle == NS_STYLE_USER_SELECT_ALL )
found = PR_FALSE;
else
{
#ifdef IBMBIDI // Simon - RTL frames reverse meaning of previous and next
// so that right arrow always moves to the right on screen
// and left arrow always moves left
if ( ((aPos->mDirection == eDirPrevious) && !isOddLevel) ||
((aPos->mDirection == eDirNext) && isOddLevel) ) {
#else
if (aPos->mDirection == eDirPrevious){
#endif
keepSearching = PR_TRUE;
tx.Init(this, mContent, aPos->mStartOffset);
aPos->mContentOffset = mContentOffset;//initialize
#ifdef IBMBIDI
wordLen = (mState & NS_FRAME_IS_BIDI) ? mContentOffset : -1;
#endif // IBMBIDI
if (tx.GetPrevWord(PR_FALSE, &wordLen, &contentLen, &isWhitespace,
PR_FALSE, aPos->mIsKeyboardSelect) &&
(aPos->mStartOffset - contentLen >= mContentOffset) ){
if ((aPos->mEatingWS && !isWhitespace) || !aPos->mEatingWS){
aPos->mContentOffset = aPos->mStartOffset - contentLen;
//check for whitespace next.
if (isWhitespace && aPos->mContentOffset <= mContentOffset)
{
keepSearching = PR_FALSE;//reached the beginning of a word
aPos->mEatingWS = PR_FALSE;//if no real word then
}
else{
#ifdef IBMBIDI
wordLen = (mState & NS_FRAME_IS_BIDI) ? mContentOffset : -1;
#endif // IBMBIDI
while (isWhitespace &&
tx.GetPrevWord(PR_FALSE, &wordLen, &contentLen,
&isWhitespace, PR_FALSE,
aPos->mIsKeyboardSelect)){
aPos->mContentOffset -= contentLen;
aPos->mEatingWS = PR_TRUE;
#ifdef IBMBIDI
wordLen = (mState & NS_FRAME_IS_BIDI) ? mContentOffset : -1;
#endif // IBMBIDI
}
aPos->mEatingWS = !isWhitespace;//nowhite space, just eat chars.
keepSearching = aPos->mContentOffset <= mContentOffset;
if (!isWhitespace){
if (!keepSearching)
found = PR_TRUE;
else
aPos->mEatingWS = PR_TRUE;
}
}
}
else {
aPos->mContentOffset = mContentLength + mContentOffset;
found = PR_TRUE;
}
}
}
#ifdef IBMBIDI // Simon, as above
else if ( ((aPos->mDirection == eDirNext) && !isOddLevel) ||
((aPos->mDirection == eDirPrevious) && isOddLevel) ) {
#else
else if (aPos->mDirection == eDirNext) {
#endif
tx.Init(this, mContent, aPos->mStartOffset );
aPos->mContentOffset = mContentOffset + mContentLength;//initialize
#ifdef IBMBIDI
wordLen = (mState & NS_FRAME_IS_BIDI) ? mContentOffset + mContentLength : -1;
#endif // IBMBIDI
if (tx.GetNextWord(PR_FALSE, &wordLen, &contentLen, &isWhitespace, &wasTransformed, PR_TRUE, PR_FALSE, aPos->mIsKeyboardSelect) &&
(aPos->mStartOffset + contentLen <= (mContentLength + mContentOffset))){
// On some platforms (mac, unix), we want the selection to end
// at the end of the word (not the beginning of the next one).
if ((wordSelectEatSpaceAfter ? isWhitespace : !isWhitespace) || !aPos->mEatingWS) {
aPos->mContentOffset = aPos->mStartOffset + contentLen;
keepSearching = PR_TRUE;
if (wordSelectEatSpaceAfter ? isWhitespace : !isWhitespace)
aPos->mEatingWS = PR_TRUE;
#ifdef IBMBIDI
wordLen = (mState & NS_FRAME_IS_BIDI)
? mContentOffset + mContentLength : -1;
#endif // IBMBIDI
while (tx.GetNextWord(PR_FALSE, &wordLen, &contentLen, &isWhitespace, &wasTransformed, PR_TRUE, PR_FALSE, aPos->mIsKeyboardSelect))
{
if (wordSelectEatSpaceAfter ? !isWhitespace : aPos->mEatingWS)
break;
if (aPos->mStartOffset + contentLen >= (mContentLength + mContentOffset))
goto TryNextFrame;
if (wordSelectEatSpaceAfter ? isWhitespace : !isWhitespace)
aPos->mEatingWS = PR_TRUE;
aPos->mContentOffset += contentLen;
#ifdef IBMBIDI
wordLen = (mState & NS_FRAME_IS_BIDI)
? mContentOffset + mContentLength : -1;
#endif // IBMBIDI
}
keepSearching = (mContentOffset + mContentLength) <= aPos->mContentOffset;
if (!keepSearching)
found = PR_TRUE;
}
else
{
aPos->mContentOffset = mContentOffset;
found = PR_TRUE;
}
}
TryNextFrame:
// XXX TODO: explain why in this case GetNextInFlow() is good enough,
// but in the case of
// aPos->mStartOffset > (mContentOffset + mContentLength)
// above, we use the presentation context and get the 'nextBidi'
frameUsed = GetNextInFlow();
start = 0;
}
}
if (!found ||
(aPos->mContentOffset > (mContentOffset + mContentLength)) ||
(aPos->mContentOffset < mContentOffset))
{
aPos->mContentOffset = PR_MIN(aPos->mContentOffset, mContentOffset + mContentLength);
aPos->mContentOffset = PR_MAX(aPos->mContentOffset, mContentOffset);
if (wordSelectEatSpaceAfter && aPos->mDirection == eDirNext && aPos->mEatingWS) {
//If we want to stop at beginning of the next word
//GetFrameFromDirction should not return NS_ERROR_FAILURE at end of line
aPos->mEatingWS = PR_FALSE;
result = GetFrameFromDirection(aPresContext, aPos);
aPos->mEatingWS = PR_TRUE;
}
else
result = GetFrameFromDirection(aPresContext, aPos);
if (NS_SUCCEEDED(result) && aPos->mResultFrame && aPos->mResultFrame!= this)
{
// undoing the RTL flipping of mPreferLeft in the case where
// the inner call will do it itself;
// note that mAmount, as well as mPreferLeft might have been modified
// by the call to GetFrameFromDirection (if we are moving to another line)
if (eSelectWord == aPos->mAmount)
aPos->mPreferLeft ^= isOddLevel;
if (NS_SUCCEEDED(result = aPos->mResultFrame->PeekOffset(aPresContext, aPos)))
return NS_OK;//else fall through
else if (aPos->mDirection == eDirNext)
aPos->mContentOffset = mContentOffset + mContentLength;
else
aPos->mContentOffset = mContentOffset;
}
else
aPos->mResultContent = mContent;
}
else
{
aPos->mResultContent = mContent;
}
}
break;
#ifdef IBMBIDI
case eSelectDir:
result = GetFrameFromDirection(aPresContext, aPos);
if (NS_SUCCEEDED(result) && aPos->mResultFrame && aPos->mResultFrame!= this)
return aPos->mResultFrame->PeekOffset(aPresContext, aPos);
else {
return result;
}
break;
#endif
default:
result = NS_ERROR_FAILURE; break;
}
aPos->mContentOffsetEnd = aPos->mContentOffset;
if (NS_FAILED(result)){
aPos->mResultContent = mContent;
//aPos->mContentOffset = aPos->mStartOffset;
result = NS_OK;
}
aPos->mResultFrame = this;
return result;
}
NS_IMETHODIMP
nsTextFrame::HandleMultiplePress(nsPresContext* aPresContext,
nsGUIEvent* aEvent,
nsEventStatus* aEventStatus)
{
if (DisplaySelection(aPresContext) == nsISelectionController::SELECTION_OFF) {
return NS_OK;
}
nsMouseEvent *me = (nsMouseEvent *)aEvent;
if (!me) return NS_OK;
// Triple- and greater click counts are handled by nsFrame.
if (me->clickCount > 2)
return nsFrame::HandleMultiplePress(aPresContext, aEvent, aEventStatus);
// Double-click: word selection, handled here:
PRInt32 startPos = 0;
PRInt32 contentOffsetEnd = 0;
nsCOMPtr<nsIContent> newContent;
nsresult rv = GetPosition(aPresContext, aEvent->point,
getter_AddRefs(newContent), startPos,
contentOffsetEnd);
if (NS_FAILED(rv))
return rv;
return PeekBackwardAndForward(eSelectWord, eSelectWord, startPos,
aPresContext, PR_FALSE);
}
NS_IMETHODIMP
nsTextFrame::CheckVisibility(nsPresContext* aContext, PRInt32 aStartIndex, PRInt32 aEndIndex, PRBool aRecurse, PRBool *aFinished, PRBool *_retval)
{
if (!aFinished || !_retval)
return NS_ERROR_NULL_POINTER;
if (*aFinished)
return NS_ERROR_FAILURE; //dont call with finished != false
if (mContentOffset > aEndIndex)
return NS_OK; //reached the end
if (mContentOffset > aStartIndex)
aStartIndex = mContentOffset;
if (aStartIndex >= aEndIndex) //how can it be greater?? check anyway
return NS_OK; //reached the end.
nsresult rv ;
if (aStartIndex < (mContentOffset + mContentLength))
{
//get the presshell
nsIPresShell *shell = aContext->GetPresShell();
if (!shell)
return NS_ERROR_FAILURE;
//get the document
nsIDocument *doc = shell->GetDocument();
if (!doc)
return NS_ERROR_FAILURE;
//create texttransformer
nsTextTransformer tx(doc->GetLineBreaker(), nsnull, aContext);
//create the buffers
nsAutoTextBuffer paintBuffer;
nsAutoIndexBuffer indexBuffer;
if (NS_FAILED(indexBuffer.GrowTo(mContentLength + 1)))
return NS_ERROR_FAILURE;//bail out
PRInt32 textLength;
PrepareUnicodeText(tx, &indexBuffer, &paintBuffer, &textLength);
if (textLength)//we have something to measure?
{
PRInt32 start = PR_MAX(aStartIndex,mContentOffset);
PRInt32 end = PR_MIN(mContentOffset + mContentLength-1, aEndIndex); //base 0 index of array
while (start != end)
{
if (indexBuffer.mBuffer[start] < indexBuffer.mBuffer[start+1]) //we have a rendered char!
{
*aFinished = PR_TRUE;//we are done bubble out.
*_retval = PR_TRUE;//hit a drawn char
return NS_OK;
}
start++;
}
if (start == aEndIndex)
{
*aFinished = PR_TRUE;
}
}
}
if (aRecurse) //recurse through the siblings.
{
nsIFrame *nextInFlow = this;
rv = NS_OK;
while (!aFinished && nextInFlow && NS_SUCCEEDED(rv) && !*_retval) //while we havent found anything visible
{
nextInFlow = nextInFlow->GetNextInFlow();
if (nextInFlow)
{
rv = nextInFlow->CheckVisibility(aContext,aStartIndex,aEndIndex,PR_FALSE,aFinished,_retval);
}
}
}
return NS_OK;
}
NS_IMETHODIMP
nsTextFrame::GetOffsets(PRInt32 &start, PRInt32 &end) const
{
start = mContentOffset;
end = mContentOffset+mContentLength;
return NS_OK;
}
#define TEXT_MAX_NUM_SEGMENTS 65
struct SegmentData {
PRUint32 mIsWhitespace : 1;
PRUint32 mContentLen : 31; // content length
PRBool IsWhitespace() {return PRBool(mIsWhitespace);}
// Get the content length. This is a running total of all
// the previous segments as well
PRInt32 ContentLen() {return PRInt32(mContentLen);}
};
struct TextRun {
// Total number of characters and the accumulated content length
PRInt32 mTotalNumChars, mTotalContentLen;
// Words and whitespace each count as a segment
PRInt32 mNumSegments;
// Possible break points specified as offsets into the buffer
PRInt32 mBreaks[TEXT_MAX_NUM_SEGMENTS];
// Per segment data
SegmentData mSegments[TEXT_MAX_NUM_SEGMENTS];
TextRun()
{
Reset();
}
void Reset()
{
mNumSegments = 0;
mTotalNumChars = 0;
mTotalContentLen = 0;
}
// Returns PR_TRUE if we're currently buffering text
PRBool IsBuffering()
{
return mNumSegments > 0;
}
void AddSegment(PRInt32 aNumChars, PRInt32 aContentLen, PRBool aIsWhitespace)
{
NS_PRECONDITION(mNumSegments < TEXT_MAX_NUM_SEGMENTS, "segment overflow");
#ifdef IBMBIDI
if (mNumSegments >= TEXT_MAX_NUM_SEGMENTS) {
return;
}
#endif // IBMBIDI
mTotalNumChars += aNumChars;
mBreaks[mNumSegments] = mTotalNumChars;
mSegments[mNumSegments].mIsWhitespace = aIsWhitespace;
mTotalContentLen += aContentLen;
mSegments[mNumSegments].mContentLen = PRUint32(mTotalContentLen);
mNumSegments++;
}
};
// Transforms characters in place from ascii to Unicode
static void
TransformTextToUnicode(char* aText, PRInt32 aNumChars)
{
// Go backwards over the characters and convert them.
unsigned char* cp1 = (unsigned char*)aText + aNumChars - 1;
PRUnichar* cp2 = (PRUnichar*)aText + (aNumChars - 1);
while (aNumChars-- > 0) {
// XXX: If you crash here then you may see the issue described
// in http://bugzilla.mozilla.org/show_bug.cgi?id=36146#c44
*cp2-- = PRUnichar(*cp1--);
}
}
PRUint32
nsTextFrame::EstimateNumChars(PRUint32 aAvailableWidth,
PRUint32 aAverageCharWidth)
{
// Estimate the number of characters that will fit. Use 105% of the available
// width divided by the average character width.
// If mAveCharWidth is zero, we can fit the entire line.
if (aAverageCharWidth == 0) {
return PR_UINT32_MAX;
}
PRUint32 estimatedNumChars = aAvailableWidth / aAverageCharWidth;
return estimatedNumChars + estimatedNumChars / 20;
}
// Replaced by precompiled CCMap (see bug 180266). To update the list
// of characters, see one of files included below. As for the way
// the original list of characters was obtained by Frank Tang, see bug 54467.
// Updated to fix the regression (bug 263411). The list contains
// characters of the following Unicode character classes : Ps, Pi, Po, Pf, Pe.
// (ref.: http://www.w3.org/TR/2004/CR-CSS21-20040225/selector.html#first-letter)
// Note that the file does NOT yet include non-BMP characters because
// there's no point including them without fixing the way we identify
// 'first-letter' currently working only with BMP characters.
#include "punct_marks.ccmap"
DEFINE_CCMAP(gPuncCharsCCMap, const);
#define IsPunctuationMark(ch) (CCMAP_HAS_CHAR(gPuncCharsCCMap, ch))
nsReflowStatus
nsTextFrame::MeasureText(nsPresContext* aPresContext,
const nsHTMLReflowState& aReflowState,
nsTextTransformer& aTx,
nsILineBreaker* aLb,
TextStyle& aTs,
TextReflowData& aTextData)
{
PRBool firstThing = PR_TRUE;
nscoord maxWidth = aReflowState.availableWidth;
nsLineLayout& lineLayout = *aReflowState.mLineLayout;
PRInt32 contentLength = aTx.GetContentLength();
PRInt32 startingOffset = aTextData.mOffset;
PRInt32 prevOffset = -1;
PRInt32 column = mColumn;
PRInt32 prevColumn = column;
nscoord prevMaxWordWidth = 0, prevAscent = 0, prevDescent = 0;
PRInt32 lastWordLen = 0;
PRUnichar* lastWordPtr = nsnull;
PRBool endsInWhitespace = PR_FALSE;
PRBool endsInNewline = PR_FALSE;
PRBool justDidFirstLetter = PR_FALSE;
nsTextDimensions dimensions, lastWordDimensions;
PRBool measureTextRuns = PR_FALSE;
if (contentLength == 0) {
aTextData.mX = 0;
aTextData.mAscent = 0;
aTextData.mDescent = 0;
return NS_FRAME_COMPLETE;
}
#if defined(_WIN32) || defined(XP_OS2) || defined(MOZ_X11) || defined(XP_BEOS)
// see if we have implementation for GetTextDimensions()
PRUint32 hints = 0;
aReflowState.rendContext->GetHints(hints);
if (hints & NS_RENDERING_HINT_FAST_MEASURE) {
measureTextRuns = !aTextData.mComputeMaxWordWidth && !aTs.mPreformatted &&
!aTs.mSmallCaps && !aTs.mWordSpacing && !aTs.mLetterSpacing &&
aTextData.mWrapping;
}
// Don't measure text runs with letter spacing active, it doesn't work
// it also doesn't work if we are not word-wrapping (bug 42832)
#endif /* defined(_WIN32) || defined(XP_OS2) || defined(MOZ_X11) || defined(XP_BEOS)*/
TextRun textRun;
PRUint32 estimatedNumChars = EstimateNumChars(maxWidth - aTextData.mX,
aTs.mAveCharWidth);
#ifdef IBMBIDI
nsTextFrame* nextBidi = nsnull;
PRInt32 start = -1, end;
if (mState & NS_FRAME_IS_BIDI) {
nextBidi = NS_STATIC_CAST(nsTextFrame*,
aPresContext->PropertyTable()->GetProperty(this,
nsLayoutAtoms::nextBidi));
if (nextBidi) {
if (mContentLength < 1) {
mContentLength = 1;
}
nextBidi->GetOffsets(start, end);
if (start <= mContentOffset) {
nextBidi->AdjustOffsetsForBidi(mContentOffset + mContentLength, end);
}
else {
mContentLength = start - mContentOffset;
}
}
}
#endif //IBMBIDI
aTextData.mX = 0;
if (aTextData.mMeasureText) {
aTs.mNormalFont->GetMaxAscent(aTextData.mAscent);
aTs.mNormalFont->GetMaxDescent(aTextData.mDescent);
}
PRBool firstWordDone = PR_FALSE;
for (;;) {
#ifdef IBMBIDI
if (nextBidi && (mContentLength <= 0) ) {
if (textRun.IsBuffering()) {
// Measure the remaining text
goto MeasureTextRun;
}
else {
break;
}
}
#endif // IBMBIDI
// Get next word/whitespace from the text
PRBool isWhitespace, wasTransformed;
PRInt32 wordLen, contentLen;
union {
char* bp1;
PRUnichar* bp2;
};
#ifdef IBMBIDI
wordLen = start;
#endif // IBMBIDI
bp2 = aTx.GetNextWord(aTextData.mInWord, &wordLen, &contentLen, &isWhitespace,
&wasTransformed, textRun.mNumSegments == 0);
// We need to set aTextData.mCanBreakBefore to true after 1st word. But we can't set
// aTextData.mCanBreakBefore without seeing the 2nd word. That's because this frame
// may only contain part of one word, the other part is in next frame.
// we don't care if first word is whitespace, that will be addressed later.
if (!aTextData.mCanBreakBefore && !firstThing && !isWhitespace) {
firstWordDone = PR_TRUE;
}
#ifdef IBMBIDI
if (nextBidi) {
mContentLength -= contentLen;
if (mContentLength < 0) {
contentLen += mContentLength;
wordLen = PR_MIN(wordLen, contentLen);
}
}
#endif // IBMBIDI
// Remember if the text was transformed
if (wasTransformed) {
mState |= TEXT_WAS_TRANSFORMED;
}
if (bp2) {
if (firstWordDone) {
// The first word has been processed, and 2nd word is seen
// we can set it be breakable here after.
aTextData.mCanBreakBefore = PR_TRUE;
}
} else {
if (textRun.IsBuffering()) {
// Measure the remaining text
goto MeasureTextRun;
}
else {
// Advance the offset in case we just consumed a bunch of
// discarded characters. Otherwise, if this is the first piece
// of content for this frame we will attempt to break-before it.
aTextData.mOffset += contentLen;
break;
}
}
lastWordLen = wordLen;
lastWordPtr = bp2;
aTextData.mInWord = PR_FALSE;
// Measure the word/whitespace
PRUnichar firstChar;
if (aTx.TransformedTextIsAscii()) {
firstChar = *bp1;
} else {
firstChar = *bp2;
}
if (isWhitespace) {
if ('\n' == firstChar) {
// We hit a newline. Stop looping.
NS_WARN_IF_FALSE(aTs.mPreformatted, "newline w/o ts.mPreformatted");
prevOffset = aTextData.mOffset;
aTextData.mOffset++;
endsInWhitespace = PR_TRUE;
endsInNewline = PR_TRUE;
break;
}
if (aTextData.mSkipWhitespace) {
aTextData.mOffset += contentLen;
aTextData.mSkipWhitespace = PR_FALSE;
if (wasTransformed) {
// As long as there were no discarded characters, then don't consider
// skipped leading whitespace as being transformed
if (wordLen == contentLen) {
mState &= ~TEXT_WAS_TRANSFORMED;
}
}
// Only set flag when we actually do skip whitespace
mState |= TEXT_SKIP_LEADING_WS;
continue;
}
firstThing = PR_FALSE;
// NOTE: Even if the textRun absorbs the whitespace below, we still
// want to remember that we're breakable.
aTextData.mCanBreakBefore = PR_TRUE;
aTextData.mFirstLetterOK = PR_FALSE;
if ('\t' == firstChar) {
// Expand tabs to the proper width
wordLen = 8 - (7 & column);
// Apply word spacing to every space derived from a tab
dimensions.width = (aTs.mSpaceWidth + aTs.mWordSpacing + aTs.mLetterSpacing)*wordLen;
// Because we have to expand the tab when rendering consider that
// a transformation of the text
mState |= TEXT_WAS_TRANSFORMED;
}
else if (textRun.IsBuffering()) {
// Add a whitespace segment
textRun.AddSegment(wordLen, contentLen, PR_TRUE);
continue;
}
else {
// Apply word spacing to every space, if there's more than one
dimensions.width = wordLen*(aTs.mWordSpacing + aTs.mLetterSpacing + aTs.mSpaceWidth);// XXX simplistic
}
//Even if there is not enough space for this "space", we still put it
//here instead of next line
prevColumn = column;
column += wordLen;
endsInWhitespace = PR_TRUE;
prevOffset = aTextData.mOffset;
aTextData.mOffset += contentLen;
if (aTextData.mMeasureText) {
//if we're wrapping, then don't add the whitespace width to the
// x-offset unless the whitespace will fit within maxWidth.''
if (aTextData.mWrapping) {
if (aTextData.mX + dimensions.width <= maxWidth) {
aTextData.mX += dimensions.width;
}
else {
// since we didn't add the trailing space width, set this flag so that
// we will not trim this non-existing space
aTextData.mTrailingSpaceTrimmed = PR_TRUE;
break;
}
}
else {
//if we're not wrapping, then always advance
// the x-offset regardless of maxWidth
aTextData.mX += dimensions.width;
}
} //(aTextData.mMeasureText)
}
else {
firstThing = PR_FALSE;
aTextData.mSkipWhitespace = PR_FALSE;
if (aTextData.mFirstLetterOK) {
if (IsPunctuationMark(firstChar)) {
if (contentLen > 1)
{
wordLen = 2;
contentLen = 2;
}
}
else {
wordLen = 1;
contentLen = 1;
}
justDidFirstLetter = PR_TRUE;
}
if (aTextData.mMeasureText) {
if (measureTextRuns && !justDidFirstLetter) {
// Add another word to the text run
textRun.AddSegment(wordLen, contentLen, PR_FALSE);
// See if we should measure the text
if ((textRun.mTotalNumChars >= estimatedNumChars) ||
(textRun.mNumSegments >= (TEXT_MAX_NUM_SEGMENTS - 1))) {
goto MeasureTextRun;
}
}
else {
if (aTs.mSmallCaps) {
MeasureSmallCapsText(aReflowState, aTs, bp2, wordLen, PR_FALSE, &dimensions);
}
else {
// Measure just the one word
if (aTx.TransformedTextIsAscii()) {
aReflowState.rendContext->GetTextDimensions(bp1, wordLen, dimensions);
} else {
aReflowState.rendContext->GetTextDimensions(bp2, wordLen, dimensions);
}
#ifdef MOZ_MATHML
// If GetBoundingMetrics is available, use the exact glyph metrics
// for ::first-letter
// XXX remove the #ifdef if GetBoundingMetrics becomes mainstream
if (justDidFirstLetter) {
nsresult res;
nsBoundingMetrics bm;
if (aTx.TransformedTextIsAscii()) {
res = aReflowState.rendContext->GetBoundingMetrics(bp1, wordLen, bm);
} else {
res = aReflowState.rendContext->GetBoundingMetrics(bp2, wordLen, bm);
}
if (NS_SUCCEEDED(res)) {
aTextData.mAscent = dimensions.ascent = bm.ascent;
aTextData.mDescent = dimensions.descent = bm.descent;
}
}
#endif
if (aTs.mLetterSpacing) {
dimensions.width += aTs.mLetterSpacing * wordLen;
}
}
lastWordDimensions = dimensions;
// See if there is room for the text
if ((0 != aTextData.mX) && aTextData.mWrapping && (aTextData.mX + dimensions.width > maxWidth)) {
// The text will not fit.
break;
}
prevMaxWordWidth = aTextData.mMaxWordWidth;
prevAscent = aTextData.mAscent;
prevDescent = aTextData.mDescent;
aTextData.mX += dimensions.width;
if (dimensions.width > aTextData.mMaxWordWidth) {
aTextData.mMaxWordWidth = dimensions.width;
}
if (aTextData.mAscent < dimensions.ascent) {
aTextData.mAscent = dimensions.ascent;
}
if (aTextData.mDescent < dimensions.descent) {
aTextData.mDescent = dimensions.descent;
}
prevColumn = column;
column += wordLen;
endsInWhitespace = PR_FALSE;
prevOffset = aTextData.mOffset;
aTextData.mOffset += contentLen;
if (justDidFirstLetter) {
// Time to stop
break;
}
}
}
else {
// We didn't measure the text, but we need to update our state
prevColumn = column;
column += wordLen;
endsInWhitespace = PR_FALSE;
prevOffset = aTextData.mOffset;
aTextData.mOffset += contentLen;
if (justDidFirstLetter) {
// Time to stop
break;
}
}
}
continue;
MeasureTextRun:
#if defined(_WIN32) || defined(XP_OS2) || defined(MOZ_X11) || defined(XP_BEOS)
// see if we have implementation for GetTextDimensions()
if (hints & NS_RENDERING_HINT_FAST_MEASURE) {
PRInt32 numCharsFit;
// These calls can return numCharsFit not positioned at a break in the textRun. Beware.
if (aTx.TransformedTextIsAscii()) {
aReflowState.rendContext->GetTextDimensions((char*)aTx.GetWordBuffer(), textRun.mTotalNumChars,
maxWidth - aTextData.mX,
textRun.mBreaks, textRun.mNumSegments,
dimensions, numCharsFit, lastWordDimensions);
} else {
aReflowState.rendContext->GetTextDimensions(aTx.GetWordBuffer(), textRun.mTotalNumChars,
maxWidth - aTextData.mX,
textRun.mBreaks, textRun.mNumSegments,
dimensions, numCharsFit, lastWordDimensions);
}
// See how much of the text fit
if ((0 != aTextData.mX) && aTextData.mWrapping && (aTextData.mX + dimensions.width > maxWidth)) {
// None of the text fits
#ifdef IBMBIDI
nextBidi = nsnull;
#endif // IBMBIDI
break;
}
// Find the index of the last segment that fit
PRInt32 lastSegment;
if (numCharsFit >= textRun.mTotalNumChars) { // fast path, normal case
NS_ASSERTION(numCharsFit == textRun.mTotalNumChars, "shouldn't overshoot");
lastSegment = textRun.mNumSegments - 1;
} else {
for (lastSegment = 0; textRun.mBreaks[lastSegment] < numCharsFit; lastSegment++) ;
NS_ASSERTION(lastSegment < textRun.mNumSegments, "failed to find segment");
// now we have textRun.mBreaks[lastSegment] >= numCharsFit
/* O'Callahan XXX: This snippet together with the snippet below prevents mail from loading
Justification seems to work just fine without these changes.
We get into trouble in a case where lastSegment gets set to -1
if (textRun.mBreaks[lastSegment] > numCharsFit) {
// NOTE: this segment did not actually fit!
lastSegment--;
}
*/
}
/* O'Callahan XXX: This snippet together with the snippet above prevents mail from loading
if (lastSegment < 0) {
// no segments fit
break;
} else */
if (lastSegment == 0) {
// Only one segment fit
prevColumn = column;
prevOffset = aTextData.mOffset;
} else {
// The previous state is for the next to last word
// NOTE: The textRun data are relative to the last updated column and offset!
prevColumn = column + textRun.mBreaks[lastSegment - 1];
prevOffset = aTextData.mOffset + textRun.mSegments[lastSegment - 1].ContentLen();
}
aTextData.mX += dimensions.width;
if (aTextData.mAscent < dimensions.ascent) {
aTextData.mAscent = dimensions.ascent;
}
if (aTextData.mDescent < dimensions.descent) {
aTextData.mDescent = dimensions.descent;
}
// this is where to backup if line-breaking happens to push the last word
prevAscent = aTextData.mAscent;
prevDescent = aTextData.mDescent;
// we can now consider the last word since we know where to backup
if (aTextData.mAscent < lastWordDimensions.ascent) {
aTextData.mAscent = lastWordDimensions.ascent;
}
if (aTextData.mDescent < lastWordDimensions.descent) {
aTextData.mDescent = lastWordDimensions.descent;
}
column += numCharsFit;
aTextData.mOffset += textRun.mSegments[lastSegment].ContentLen();
endsInWhitespace = textRun.mSegments[lastSegment].IsWhitespace();
// If all the text didn't fit, then we're done
if (numCharsFit != textRun.mTotalNumChars) {
#ifdef IBMBIDI
nextBidi = nsnull;
#endif // IBMBIDI
break;
}
#ifdef IBMBIDI
if (nextBidi && (mContentLength <= 0) ) {
break;
}
#endif // IBMBIDI
if (nsnull == bp2) {
// No more text so we're all finished. Advance the offset in case the last
// call to GetNextWord() discarded characters
aTextData.mOffset += contentLen;
break;
}
// Reset the number of text run segments
textRun.Reset();
// Estimate the remaining number of characters we think will fit
estimatedNumChars = EstimateNumChars(maxWidth - aTextData.mX,
aTs.mAveCharWidth);
}
#else /* defined(_WIN32) || defined(XP_OS2) || defined(MOZ_X11) || defined(XP_BEOS) */
int unused = -1;
#endif /* defined(_WIN32) || defined(XP_OS2) || defined(MOZ_X11) || defined(XP_BEOS) */
}
// If we didn't actually measure any text, then make sure it looks
// like we did
if (!aTextData.mMeasureText) {
aTextData.mAscent = mAscent;
aTextData.mDescent = mRect.height - aTextData.mAscent;
aTextData.mX = mRect.width;
if (mState & TEXT_TRIMMED_WS) {
// Add back in the width of a space since it was trimmed away last time
// NOTE: Trailing whitespace includes word and letter spacing!
aTextData.mX += aTs.mSpaceWidth + aTs.mWordSpacing + aTs.mLetterSpacing;
}
}
// Post processing logic to deal with word-breaking that spans
// multiple frames.
if (lineLayout.InWord()) {
// We are already in a word. This means a text frame prior to this
// one had a fragment of a nbword that is joined with this
// frame. It also means that the prior frame already found this
// frame and recorded it as part of the word.
#ifdef DEBUG_WORD_WRAPPING
ListTag(stdout);
printf(": in word; skipping\n");
#endif
lineLayout.ForgetWordFrame(this);
}
if (!lineLayout.InWord()) {
// There is no currently active word. This frame may contain the
// start of one.
if (endsInWhitespace) {
// Nope, this frame doesn't start a word.
lineLayout.ForgetWordFrames();
}
else if ((aTextData.mOffset == contentLength) && (prevOffset >= 0)) {
// Force breakable to false when we aren't wrapping (this
// guarantees that the combined word will stay together)
if (!aTextData.mWrapping) {
aTextData.mCanBreakBefore = PR_FALSE;
}
// This frame does start a word. However, there is no point
// messing around with it if we are already out of room. We
// always have room if we are not breakable.
if (!aTextData.mCanBreakBefore || (aTextData.mX <= maxWidth)) {
// There is room for this word fragment. It's possible that
// this word fragment is the end of the text-run. If it's not
// then we continue with the look-ahead processing.
nsIFrame* next = lineLayout.FindNextText(aPresContext, this);
if (nsnull != next) {
#ifdef DEBUG_WORD_WRAPPING
nsAutoString tmp(aTx.GetWordBuffer(), lastWordLen);
ListTag(stdout);
printf(": start='");
fputs(NS_LossyConvertUCS2toASCII(tmp).get(), stdout);
printf("' lastWordLen=%d baseWidth=%d prevOffset=%d offset=%d next=",
lastWordLen, lastWordDimensions.width, prevOffset, aTextData.mOffset);
ListTag(stdout, next);
printf("\n");
#endif
PRUnichar* pWordBuf = lastWordPtr;
PRUint32 wordBufLen = aTx.GetWordBufferLength() -
(lastWordPtr - aTx.GetWordBuffer());
if (aTx.TransformedTextIsAscii()) {
// The text transform buffer contains ascii characters, so
// transform it to Unicode
NS_ASSERTION(wordBufLen >= PRUint32(lastWordLen), "no room to transform in place");
TransformTextToUnicode((char*)lastWordPtr, lastWordLen);
}
// Look ahead in the text-run and compute the final word
// width, taking into account any style changes and stopping
// at the first breakable point.
if (!aTextData.mMeasureText || (lastWordDimensions.width == -1)) {
// We either didn't measure any text or we measured multiple words
// at once so either way we don't know lastWordDimensions. We'll have to
// compute it now
if (prevOffset == startingOffset) {
// There's only one word, so we don't have to measure after all
lastWordDimensions.width = aTextData.mX;
}
else if (aTs.mSmallCaps) {
MeasureSmallCapsText(aReflowState, aTs, pWordBuf,
lastWordLen, PR_FALSE, &lastWordDimensions);
}
else {
aReflowState.rendContext->GetTextDimensions(pWordBuf, lastWordLen, lastWordDimensions);
if (aTs.mLetterSpacing) {
lastWordDimensions.width += aTs.mLetterSpacing * lastWordLen;
}
}
}
nsTextDimensions wordDimensions = ComputeTotalWordDimensions(aPresContext, aLb,
lineLayout,
aReflowState, next,
lastWordDimensions,
pWordBuf,
lastWordLen,
wordBufLen,
aTextData.mCanBreakBefore);
if (!aTextData.mCanBreakBefore || (aTextData.mX - lastWordDimensions.width + wordDimensions.width <= maxWidth)) {
// The fully joined word has fit. Account for the joined
// word's affect on the max-element-size here (since the
// joined word is large than it's pieces, the right effect
// will occur from the perspective of the container
// reflowing this frame)
if (wordDimensions.width > aTextData.mMaxWordWidth) {
aTextData.mMaxWordWidth = wordDimensions.width;
}
// Now that we now that we will retain the last word, we should
// account for its ascent and descent
if (aTextData.mAscent < lastWordDimensions.ascent) {
aTextData.mAscent = lastWordDimensions.ascent;
}
if (aTextData.mDescent < lastWordDimensions.descent) {
aTextData.mDescent = lastWordDimensions.descent;
}
}
else {
#ifdef NOISY_REFLOW
ListTag(stdout);
printf(": look-ahead (didn't fit) x=%d wordWidth=%d lastWordWidth=%d\n",
aTextData.mX, wordDimensions.width, lastWordDimensions.width);
#endif
// The fully joined word won't fit. We need to reduce our
// size by lastWordDimensions
aTextData.mX -= lastWordDimensions.width;
aTextData.mMaxWordWidth = prevMaxWordWidth;
aTextData.mOffset = prevOffset;
column = prevColumn;
if (aTextData.mMeasureText) {
aTextData.mAscent = prevAscent;
aTextData.mDescent = prevDescent;
}
// else {
// XXX we didn't measure the text, and so we don't know where to back up,
// we will retain our current height. However, there is a possible
// edge case that is not handled: since we just chopped the last word,
// our remaining text could have got shorter.
// }
#ifdef DEBUG_WORD_WRAPPING
printf(" x=%d maxWordWidth=%d len=%d\n", aTextData.mX, aTextData.mMaxWordWidth,
aTextData.mOffset - startingOffset);
#endif
lineLayout.ForgetWordFrames();
}
}
}
}
}
// Inform line layout of how this piece of text ends in whitespace
// (only text objects do this). Note that if x is zero then this
// text object collapsed into nothingness which means it shouldn't
// effect the current setting of the ends-in-whitespace flag.
lineLayout.SetColumn(column);
lineLayout.SetUnderstandsWhiteSpace(PR_TRUE);
if (0 != aTextData.mX) {
lineLayout.SetEndsInWhiteSpace(endsInWhitespace);
}
if (justDidFirstLetter) {
lineLayout.SetFirstLetterFrame(this);
lineLayout.SetFirstLetterStyleOK(PR_FALSE);
mState |= TEXT_FIRST_LETTER;
}
// Return our reflow status
nsReflowStatus rs = (aTextData.mOffset == contentLength)
#ifdef IBMBIDI
|| (aTextData.mOffset == start)
#endif // IBMBIDI
? NS_FRAME_COMPLETE
: NS_FRAME_NOT_COMPLETE;
if (endsInNewline) {
rs = NS_INLINE_LINE_BREAK_AFTER(rs);
lineLayout.SetLineEndsInBR(PR_TRUE);
}
else if ((aTextData.mOffset != contentLength) && (aTextData.mOffset == startingOffset)) {
// Break-before a long-word that doesn't fit here
rs = NS_INLINE_LINE_BREAK_BEFORE();
}
return rs;
}
NS_IMETHODIMP
nsTextFrame::Reflow(nsPresContext* aPresContext,
nsHTMLReflowMetrics& aMetrics,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus)
{
DO_GLOBAL_REFLOW_COUNT("nsTextFrame", aReflowState.reason);
DISPLAY_REFLOW(aPresContext, this, aReflowState, aMetrics, aStatus);
#ifdef NOISY_REFLOW
ListTag(stdout);
printf(": BeginReflow: availableSize=%d,%d\n",
aReflowState.availableWidth, aReflowState.availableHeight);
#endif
mState &= ~TEXT_IS_END_OF_LINE;
// XXX If there's no line layout, we shouldn't even have created this
// frame. This may happen if, for example, this is text inside a table
// but not inside a cell. For now, just don't reflow.
if (nsnull == aReflowState.mLineLayout) {
// XXX Add a method to aMetrics that does this; we do it several places
aMetrics.width = 0;
aMetrics.height = 0;
aMetrics.ascent = 0;
aMetrics.descent = 0;
if (aMetrics.mComputeMEW) {
aMetrics.mMaxElementWidth = 0;
}
#ifdef MOZ_MATHML
if (NS_REFLOW_CALC_BOUNDING_METRICS & aMetrics.mFlags)
aMetrics.mBoundingMetrics.Clear();
#endif
return NS_OK;
}
// Get starting offset into the content
PRInt32 startingOffset = 0;
nsIFrame* prevInFlow = GetPrevInFlow();
if (nsnull != prevInFlow) {
nsTextFrame* prev = (nsTextFrame*)prevInFlow;
startingOffset = prev->mContentOffset + prev->mContentLength;
// If our starting offset doesn't agree with mContentOffset, then our
// prev-in-flow has changed the number of characters it maps and so we
// need to measure text and not try and optimize a resize reflow
if (startingOffset != mContentOffset) {
mState &= ~TEXT_OPTIMIZE_RESIZE;
}
}
nsLineLayout& lineLayout = *aReflowState.mLineLayout;
TextStyle ts(aPresContext, *aReflowState.rendContext, mStyleContext);
if ( (mContentLength > 0) && (mState & NS_FRAME_IS_BIDI) ) {
startingOffset = mContentOffset;
}
if (aPresContext->BidiEnabled()) {
nsCharType charType = eCharType_LeftToRight;
PRUint32 hints = 0;
aReflowState.rendContext->GetHints(hints);
charType = (nsCharType)NS_PTR_TO_INT32(aPresContext->PropertyTable()->GetProperty(this, nsLayoutAtoms::charType));
if ((eCharType_RightToLeftArabic == charType &&
(hints & NS_RENDERING_HINT_ARABIC_SHAPING) == NS_RENDERING_HINT_ARABIC_SHAPING) ||
(eCharType_RightToLeft == charType &&
(hints & NS_RENDERING_HINT_BIDI_REORDERING) == NS_RENDERING_HINT_BIDI_REORDERING)) {
aPresContext->SetIsBidiSystem(PR_TRUE);
}
}
// Clear out the reflow state flags in mState (without destroying
// the TEXT_BLINK_ON bit).
PRBool lastTimeWeSkippedLeadingWS = 0 != (mState & TEXT_SKIP_LEADING_WS);
mState &= ~TEXT_REFLOW_FLAGS;
if (aReflowState.mFlags.mBlinks) {
if (0 == (mState & TEXT_BLINK_ON)) {
mState |= TEXT_BLINK_ON;
nsBlinkTimer::AddBlinkFrame(aPresContext, this);
}
}
else {
if (0 != (mState & TEXT_BLINK_ON)) {
mState &= ~TEXT_BLINK_ON;
nsBlinkTimer::RemoveBlinkFrame(this);
}
}
PRBool wrapping = (NS_STYLE_WHITESPACE_NORMAL == ts.mText->mWhiteSpace) ||
(NS_STYLE_WHITESPACE_MOZ_PRE_WRAP == ts.mText->mWhiteSpace);
// Set whitespace skip flag
PRBool skipWhitespace = PR_FALSE;
if (!ts.mPreformatted) {
if (lineLayout.GetEndsInWhiteSpace()) {
skipWhitespace = PR_TRUE;
}
}
nscoord maxWidth = aReflowState.availableWidth;
// Setup text transformer to transform this frames text content
nsIDocument* doc = mContent->GetDocument();
if (!doc) {
NS_NOTREACHED("Content has no document");
return NS_ERROR_FAILURE;
}
PRBool forceArabicShaping = (ts.mSmallCaps ||
(0 != ts.mWordSpacing) ||
(0 != ts.mLetterSpacing) ||
ts.mJustifying);
nsILineBreaker *lb = doc->GetLineBreaker();
nsTextTransformer tx(lb, nsnull, aPresContext);
// Keep the text in ascii if possible. Note that if we're measuring small
// caps text then transform to Unicode because the helper function only
// accepts Unicode text
nsresult rv = tx.Init(this, mContent, startingOffset, forceArabicShaping, !ts.mSmallCaps);
if (NS_OK != rv) {
return rv;
}
//PRInt32 contentLength = tx.GetContentLength();
// Set inWord to true if we are part of a previous piece of text's word. This
// is only valid for one pass through the measuring loop.
PRBool inWord = lineLayout.InWord() || ((nsnull != prevInFlow) && (((nsTextFrame*)prevInFlow)->mState & TEXT_FIRST_LETTER));
if (inWord) {
mState |= TEXT_IN_WORD;
}
mState &= ~TEXT_FIRST_LETTER;
PRInt32 column = lineLayout.GetColumn();
PRInt32 prevColumn = mColumn;
mColumn = column;
PRBool measureText = PR_TRUE;
// We can avoid actually measuring the text if:
// - this is a resize reflow
// - we're not dirty (see CharacterDataChanged() function)
// - we don't have a next in flow
// - the previous reflow successfully reflowed all text in the
// available space
// - we aren't computing the max element size (that requires we measure
// text)
// - skipping leading whitespace is the same as it was the last time
// - we're wrapping text and the available width is at least as big as our
// current frame width -or-
// we're not wrapping text and we're at the same column as before (this is
// an issue for preformatted tabbed text only)
// - AND we aren't justified (in which case the frame width has already been tweaked and can't be used)
if ((eReflowReason_Resize == aReflowState.reason) &&
(0 == (mState & NS_FRAME_IS_DIRTY))) {
nscoord realWidth = mRect.width;
if (mState & TEXT_TRIMMED_WS) {
// NOTE: Trailing whitespace includes word and letter spacing!
realWidth += ts.mSpaceWidth + ts.mWordSpacing + ts.mLetterSpacing;
}
if (!mNextInFlow &&
(mState & TEXT_OPTIMIZE_RESIZE) &&
!aMetrics.mComputeMEW &&
(lastTimeWeSkippedLeadingWS == skipWhitespace) &&
((wrapping && (maxWidth >= realWidth)) ||
(!wrapping && (prevColumn == column))) &&
#ifdef IBMBIDI
(0 == (mState & NS_FRAME_IS_BIDI) ) &&
#endif // IBMBIDI
!ts.mJustifying) {
// We can skip measuring of text and use the value from our
// previous reflow
measureText = PR_FALSE;
#ifdef NOISY_REFLOW
printf(" => measureText=%s wrapping=%s skipWhitespace=%s",
measureText ? "yes" : "no",
wrapping ? "yes" : "no",
skipWhitespace ? "yes" : "no");
printf(" realWidth=%d maxWidth=%d\n",
realWidth, maxWidth);
#endif
}
}
// Local state passed to the routines that do the actual text measurement
TextReflowData textData(startingOffset, wrapping, skipWhitespace,
measureText, inWord, lineLayout.GetFirstLetterStyleOK(),
lineLayout.LineIsBreakable(), aMetrics.mComputeMEW,
PR_FALSE);
// Measure the text
// MeasureText may set TEXT_TRIMMED_WS flag, so don't clear after the call
if (ts.mFont->mSize)
aStatus = MeasureText(aPresContext, aReflowState, tx, lb, ts, textData);
else {
textData.mX = 0;
textData.mAscent = 0;
textData.mDescent = 0;
aStatus = NS_FRAME_COMPLETE;
}
if (textData.mTrailingSpaceTrimmed)
mState |= TEXT_TRIMMED_WS;
else
mState &= ~TEXT_TRIMMED_WS;
if (tx.HasMultibyte()) {
mState |= TEXT_HAS_MULTIBYTE;
}
// Setup metrics for caller; store final max-element-size information
aMetrics.width = textData.mX;
if ((0 == textData.mX) && !ts.mPreformatted) {
aMetrics.height = 0;
aMetrics.ascent = 0;
aMetrics.descent = 0;
}
else {
aMetrics.ascent = textData.mAscent;
aMetrics.descent = textData.mDescent;
aMetrics.height = aMetrics.ascent + aMetrics.descent;
}
mAscent = aMetrics.ascent;
if (!wrapping) {
textData.mMaxWordWidth = textData.mX;
}
if (aMetrics.mComputeMEW) {
aMetrics.mMaxElementWidth = textData.mMaxWordWidth;
}
// Set content offset and length
mContentOffset = startingOffset;
mContentLength = textData.mOffset - startingOffset;
// Compute space and letter counts for justification, if required
// Also use this one-shot path to compute the metrics needed for MathML, if required
// (the flag is set only if this text happens to be inside MathML)
PRBool calcMathMLMetrics = PR_FALSE;
nsAutoTextBuffer* textBufferPtr = nsnull;
#ifdef MOZ_MATHML
nsAutoTextBuffer textBuffer;
calcMathMLMetrics = (NS_REFLOW_CALC_BOUNDING_METRICS & aMetrics.mFlags) != 0;
if (calcMathMLMetrics) {
textBufferPtr = &textBuffer;
// always use the Unicode path with MathML fonts in gfx, it is safer this way
mState |= TEXT_HAS_MULTIBYTE;
}
#endif
if (ts.mJustifying || calcMathMLMetrics) {
PRIntn numJustifiableCharacter;
PRInt32 textLength;
// This will include a space for trailing whitespace, if any is present.
// This is corrected for in nsLineLayout::TrimWhiteSpaceIn.
// This work could be done in MeasureText, but it's complex to do accurately
// there because of the need to repair counts when wrapped words are backed out.
// So I do it via PrepareUnicodeText ... a little slower perhaps, but a lot saner,
// and it localizes the counting logic to one place.
PrepareUnicodeText(tx, nsnull, textBufferPtr, &textLength, PR_TRUE, &numJustifiableCharacter);
lineLayout.SetTextJustificationWeights(numJustifiableCharacter, textLength - numJustifiableCharacter);
#ifdef MOZ_MATHML
if (calcMathMLMetrics) {
SetFontFromStyle(aReflowState.rendContext, mStyleContext);
nsBoundingMetrics bm;
rv = aReflowState.rendContext->GetBoundingMetrics(textBuffer.mBuffer, textLength, bm);
if (NS_SUCCEEDED(rv))
aMetrics.mBoundingMetrics = bm;
else {
// Things didn't turn out well, just return the reflow metrics.
aMetrics.mBoundingMetrics.ascent = aMetrics.ascent;
aMetrics.mBoundingMetrics.descent = aMetrics.descent;
aMetrics.mBoundingMetrics.width = aMetrics.width;
aMetrics.mBoundingMetrics.rightBearing = aMetrics.width;
}
}
#endif
}
nscoord maxFrameWidth = mRect.width;
nscoord maxFrameHeight = mRect.height;
// For future resize reflows we would like to avoid measuring the text.
// We can only do this if after this reflow we're:
// - complete. If we're not complete then our desired width doesn't
// represent our total size
// - we fit in the available space. We may be complete, but if we
// return a larger desired width than is available we may get pushed
// and our frame width won't get set
if (NS_FRAME_IS_COMPLETE(aStatus) && !NS_INLINE_IS_BREAK(aStatus) &&
(aMetrics.width <= maxWidth)) {
mState |= TEXT_OPTIMIZE_RESIZE;
mRect.width = aMetrics.width;
}
else {
mState &= ~TEXT_OPTIMIZE_RESIZE;
}
// If it's an incremental reflow command, then invalidate our existing
// bounds.
// XXX We need a finer granularity than this, but it isn't clear what
// has actually changed...
/*if (eReflowReason_Incremental == aReflowState.reason ||
eReflowReason_Dirty == aReflowState.reason) {*/
// XXX See bug 71523 We should really adjust the frames x coordinate to
// a pixel boundary to solve this.
// For now we add 1 pixel to the width of the invalidated rect.
// This fixes cases where the twips to pixel roundoff causes the invalidated
// rect's width to be one pixel short.
nscoord onePixel = aPresContext->IntScaledPixelsToTwips(1);
maxFrameWidth = PR_MAX(maxFrameWidth, mRect.width) + onePixel;
maxFrameHeight = PR_MAX(maxFrameHeight, mRect.height);
nsRect damage(0,0,maxFrameWidth,maxFrameHeight);
Invalidate(damage);
/*}*/
#ifdef NOISY_REFLOW
ListTag(stdout);
printf(": desiredSize=%d,%d(a=%d/d=%d) status=%x\n",
aMetrics.width, aMetrics.height, aMetrics.ascent, aMetrics.descent,
aStatus);
#endif
NS_FRAME_SET_TRUNCATION(aStatus, aReflowState, aMetrics);
return NS_OK;
}
NS_IMETHODIMP
nsTextFrame::CanContinueTextRun(PRBool& aContinueTextRun) const
{
// We can continue a text run through a text frame
aContinueTextRun = PR_TRUE;
return NS_OK;
}
NS_IMETHODIMP
nsTextFrame::AdjustFrameSize(nscoord aExtraSpace, nscoord& aUsedSpace)
{
aUsedSpace = 0;
return NS_OK;
}
NS_IMETHODIMP
nsTextFrame::TrimTrailingWhiteSpace(nsPresContext* aPresContext,
nsIRenderingContext& aRC,
nscoord& aDeltaWidth,
PRBool& aLastCharIsJustifiable)
{
aLastCharIsJustifiable = PR_FALSE;
mState |= TEXT_IS_END_OF_LINE;
// in some situation (for instance, in wrapping mode, last space will not
// be added to total width if it exceed maxwidth), this flag will be set
// and we shouldn't trim non-added space
if (mState & TEXT_TRIMMED_WS) {
aDeltaWidth = 0;
return NS_OK;
}
nscoord dw = 0;
const nsStyleText* textStyle = GetStyleText();
if (mContentLength &&
(NS_STYLE_WHITESPACE_PRE != textStyle->mWhiteSpace) &&
(NS_STYLE_WHITESPACE_MOZ_PRE_WRAP != textStyle->mWhiteSpace)) {
// Get the text fragments that make up our content
nsCOMPtr<nsITextContent> tc = do_QueryInterface(mContent);
if (tc) {
const nsTextFragment* frag = tc->Text();
PRInt32 lastCharIndex = mContentOffset + mContentLength - 1;
if (lastCharIndex < frag->GetLength()) {
PRUnichar ch = frag->CharAt(lastCharIndex);
if (XP_IS_SPACE(ch)) {
// Get font metrics for a space so we can adjust the width by the
// right amount.
SetFontFromStyle(&aRC, mStyleContext);
aRC.GetWidth(' ', dw);
// NOTE: Trailing whitespace includes word and letter spacing!
nsStyleUnit unit;
unit = textStyle->mWordSpacing.GetUnit();
if (eStyleUnit_Coord == unit) {
dw += textStyle->mWordSpacing.GetCoordValue();
}
unit = textStyle->mLetterSpacing.GetUnit();
if (eStyleUnit_Coord == unit) {
dw += textStyle->mLetterSpacing.GetCoordValue();
}
aLastCharIsJustifiable = PR_TRUE;
} else if (IsJustifiableCharacter(ch, IsChineseJapaneseLangGroup())) {
aLastCharIsJustifiable = PR_TRUE;
}
}
}
}
#ifdef NOISY_TRIM
ListTag(stdout);
printf(": trim => %d\n", dw);
#endif
if (0 != dw) {
mState |= TEXT_TRIMMED_WS;
}
else {
mState &= ~TEXT_TRIMMED_WS;
}
aDeltaWidth = dw;
return NS_OK;
}
static void
RevertSpacesToNBSP(PRUnichar* aBuffer, PRInt32 aWordLen)
{
PRUnichar* end = aBuffer + aWordLen;
for (; aBuffer < end; aBuffer++) {
PRUnichar ch = *aBuffer;
if (ch == ' ') {
*aBuffer = CH_NBSP;
}
}
}
nsTextDimensions
nsTextFrame::ComputeTotalWordDimensions(nsPresContext* aPresContext,
nsILineBreaker* aLineBreaker,
nsLineLayout& aLineLayout,
const nsHTMLReflowState& aReflowState,
nsIFrame* aNextFrame,
const nsTextDimensions& aBaseDimensions,
PRUnichar* aWordBuf,
PRUint32 aWordLen,
PRUint32 aWordBufSize,
PRBool aCanBreakBefore)
{
// Before we get going, convert any spaces in the current word back
// to nbsp's. This keeps the breaking logic happy.
RevertSpacesToNBSP(aWordBuf, (PRInt32) aWordLen);
nsTextDimensions addedDimensions;
PRUnichar *newWordBuf = aWordBuf;
PRUint32 newWordBufSize = aWordBufSize;
while (aNextFrame) {
nsIContent* content = aNextFrame->GetContent();
#ifdef DEBUG_WORD_WRAPPING
printf(" next textRun=");
nsFrame::ListTag(stdout, aNextFrame);
printf("\n");
#endif
nsCOMPtr<nsITextContent> tc(do_QueryInterface(content));
if (tc) {
PRInt32 moreSize = 0;
nsTextDimensions moreDimensions;
moreDimensions = ComputeWordFragmentDimensions(aPresContext,
aLineBreaker,
aLineLayout,
aReflowState,
aNextFrame, content, tc,
&moreSize,
newWordBuf,
aWordLen,
newWordBufSize,
aCanBreakBefore);
if (moreSize > 0) {
//Oh, wordBuf is too small, we have to grow it
newWordBufSize += moreSize;
if (newWordBuf != aWordBuf) {
newWordBuf = (PRUnichar*)nsMemory::Realloc(newWordBuf, sizeof(PRUnichar)*newWordBufSize);
NS_ASSERTION(newWordBuf, "not enough memory");
} else {
newWordBuf = (PRUnichar*)nsMemory::Alloc(sizeof(PRUnichar)*newWordBufSize);
NS_ASSERTION(newWordBuf, "not enough memory");
if(newWordBuf) {
memcpy((void*)newWordBuf, aWordBuf, sizeof(PRUnichar)*(newWordBufSize-moreSize));
}
}
if(newWordBuf) {
moreDimensions =
ComputeWordFragmentDimensions(aPresContext, aLineBreaker,
aLineLayout, aReflowState,
aNextFrame, content, tc, &moreSize,
newWordBuf, aWordLen, newWordBufSize,
aCanBreakBefore);
NS_ASSERTION((moreSize <= 0),
"ComputeWordFragmentDimensions is asking more buffer");
} else {
moreSize = -1;
moreDimensions.Clear();
}
}
addedDimensions.Combine(moreDimensions);
#ifdef DEBUG_WORD_WRAPPING
printf(" moreWidth=%d (addedWidth=%d) stop=%c\n", moreDimensions.width,
addedDimensions.width, stop?'T':'F');
#endif
if (moreSize == -1) {
goto done;
}
}
else {
// It claimed it was text but it doesn't implement the
// nsITextContent API. Therefore I don't know what to do with it
// and can't look inside it. Oh well.
goto done;
}
// Move on to the next frame in the text-run
aNextFrame = aLineLayout.FindNextText(aPresContext, aNextFrame);
}
done:;
#ifdef DEBUG_WORD_WRAPPING
printf(" total word width=%d\n", aBaseDimensions.width + addedDimensions.width);
#endif
if (newWordBuf && (newWordBuf != aWordBuf)) {
nsMemory::Free(newWordBuf);
}
addedDimensions.Combine(aBaseDimensions);
return addedDimensions;
}
nsTextDimensions
nsTextFrame::ComputeWordFragmentDimensions(nsPresContext* aPresContext,
nsILineBreaker* aLineBreaker,
nsLineLayout& aLineLayout,
const nsHTMLReflowState& aReflowState,
nsIFrame* aNextFrame,
nsIContent* aContent,
nsITextContent* aText,
PRInt32* aMoreSize,
const PRUnichar* aWordBuf,
PRUint32& aRunningWordLen,
PRUint32 aWordBufSize,
PRBool aCanBreakBefore)
{
nsTextTransformer tx(aLineBreaker, nsnull, aPresContext);
tx.Init(aNextFrame, aContent, 0);
PRBool isWhitespace, wasTransformed;
PRInt32 wordLen, contentLen;
nsTextDimensions dimensions;
#ifdef IBMBIDI
if (aNextFrame->GetStateBits() & NS_FRAME_IS_BIDI) {
PRInt32 nextFrameStart, nextFrameEnd;
aNextFrame->GetOffsets(nextFrameStart, nextFrameEnd);
wordLen = nextFrameEnd;
} else {
wordLen = -1;
}
#endif // IBMBIDI
*aMoreSize = 0;
PRUnichar* bp = tx.GetNextWord(PR_TRUE, &wordLen, &contentLen, &isWhitespace, &wasTransformed);
if (!bp) {
//empty text node, but we need to continue lookahead measurement
// AND we need to remember the text frame for later so that we don't
// bother doing the word look ahead.
aLineLayout.RecordWordFrame(aNextFrame);
return dimensions; // 0
}
if (isWhitespace) {
// Don't bother measuring nothing
*aMoreSize = -1; // flag that we should stop now
return dimensions; // 0
}
// We need to adjust the length by looking at the two pieces together. But if
// we have to grow aWordBuf, ask the caller to do it by returning the shortfall
if ((wordLen + aRunningWordLen) > aWordBufSize) {
*aMoreSize = wordLen + aRunningWordLen - aWordBufSize;
return dimensions; // 0
}
if (contentLen < tx.GetContentLength())
*aMoreSize = -1;
// Convert any spaces in the current word back to nbsp's. This keeps
// the breaking logic happy.
RevertSpacesToNBSP(bp, wordLen);
if (aCanBreakBefore) {
if(wordLen > 0)
{
memcpy((void*)&(aWordBuf[aRunningWordLen]), bp, sizeof(PRUnichar)*wordLen);
PRUint32 breakP=0;
PRBool needMore=PR_TRUE;
nsresult lres = aLineBreaker->Next(aWordBuf, aRunningWordLen+wordLen,
0, &breakP, &needMore);
if(NS_SUCCEEDED(lres))
{
// when we look at two pieces text together, we might decide to break
// eariler than if we only look at the 2nd pieces of text
if(!needMore && (breakP < (aRunningWordLen + wordLen)))
{
wordLen = breakP - aRunningWordLen;
if(wordLen < 0)
wordLen = 0;
*aMoreSize = -1;
}
}
// if we don't stop, we need to extend the buf so the next one can
// see this part otherwise, it does not matter since we will stop
// anyway
if (*aMoreSize != -1)
aRunningWordLen += wordLen;
}
}
else {
// Even if the previous text fragment is not breakable, the connected pieces
// can be breakable in between. This especially true for CJK.
PRBool canBreak;
nsresult lres = aLineBreaker->BreakInBetween(aWordBuf, aRunningWordLen, bp, wordLen, &canBreak);
if (NS_SUCCEEDED(lres) && canBreak) {
wordLen = 0;
*aMoreSize = -1;
}
}
if ((*aMoreSize == -1) && (wordLen == 0))
return dimensions; // 0;
nsStyleContext* sc = aNextFrame->GetStyleContext();
if (sc) {
// Measure the piece of text. Note that we have to select the
// appropriate font into the text first because the rendering
// context has our font in it, not the font that aText is using.
nsIRenderingContext& rc = *aReflowState.rendContext;
nsCOMPtr<nsIFontMetrics> oldfm;
rc.GetFontMetrics(*getter_AddRefs(oldfm));
TextStyle ts(aLineLayout.mPresContext, rc, sc);
if (ts.mSmallCaps) {
MeasureSmallCapsText(aReflowState, ts, bp, wordLen, PR_FALSE, &dimensions);
}
else {
rc.GetTextDimensions(bp, wordLen, dimensions);
// NOTE: Don't forget to add letter spacing for the word fragment!
dimensions.width += wordLen*ts.mLetterSpacing;
}
rc.SetFont(oldfm);
#ifdef DEBUG_WORD_WRAPPING
nsAutoString tmp(bp, wordLen);
printf(" fragment='");
fputs(NS_LossyConvertUCS2toASCII(tmp).get(), stdout);
printf("' width=%d [wordLen=%d contentLen=%d ContentLength=%d]\n",
dimensions.width, wordLen, contentLen, tx.GetContentLength());
#endif
// Remember the text frame for later so that we don't bother doing
// the word look ahead.
aLineLayout.RecordWordFrame(aNextFrame);
return dimensions;
}
*aMoreSize = -1;
return dimensions; // 0
}
#ifdef DEBUG
// Translate the mapped content into a string that's printable
void
nsTextFrame::ToCString(nsString& aBuf, PRInt32* aTotalContentLength) const
{
// Get the frames text content
nsCOMPtr<nsITextContent> tc(do_QueryInterface(mContent));
if (!tc) {
return;
}
const nsTextFragment* frag = tc->Text();
// Compute the total length of the text content.
*aTotalContentLength = frag->GetLength();
// Set current fragment and current fragment offset
if (0 == mContentLength) {
return;
}
PRInt32 fragOffset = mContentOffset;
PRInt32 n = fragOffset + mContentLength;
while (fragOffset < n) {
PRUnichar ch = frag->CharAt(fragOffset++);
if (ch == '\r') {
aBuf.AppendLiteral("\\r");
} else if (ch == '\n') {
aBuf.AppendLiteral("\\n");
} else if (ch == '\t') {
aBuf.AppendLiteral("\\t");
} else if ((ch < ' ') || (ch >= 127)) {
aBuf.AppendLiteral("\\0");
aBuf.AppendInt((PRInt32)ch, 8);
} else {
aBuf.Append(ch);
}
}
}
#endif
nsIAtom*
nsTextFrame::GetType() const
{
return nsLayoutAtoms::textFrame;
}
/* virtual */ PRBool
nsTextFrame::IsEmpty()
{
NS_ASSERTION(!(mState & TEXT_IS_ONLY_WHITESPACE) ||
!(mState & TEXT_ISNOT_ONLY_WHITESPACE),
"Invalid state");
// XXXldb Should this check compatibility mode as well???
if (GetStyleText()->WhiteSpaceIsSignificant()) {
return PR_FALSE;
}
if (mState & TEXT_ISNOT_ONLY_WHITESPACE) {
return PR_FALSE;
}
if (mState & TEXT_IS_ONLY_WHITESPACE) {
return PR_TRUE;
}
nsCOMPtr<nsITextContent> textContent( do_QueryInterface(mContent) );
if (! textContent) {
NS_NOTREACHED("text frame has no text content");
return PR_TRUE;
}
PRBool isEmpty = textContent->IsOnlyWhitespace();
mState |= (isEmpty ? TEXT_IS_ONLY_WHITESPACE : TEXT_ISNOT_ONLY_WHITESPACE);
return isEmpty;
}
#ifdef DEBUG
NS_IMETHODIMP
nsTextFrame::GetFrameName(nsAString& aResult) const
{
return MakeFrameName(NS_LITERAL_STRING("Text"), aResult);
}
NS_IMETHODIMP_(nsFrameState)
nsTextFrame::GetDebugStateBits() const
{
// mask out our emptystate flags; those are just caches
return nsFrame::GetDebugStateBits() &
~(TEXT_WHITESPACE_FLAGS | TEXT_REFLOW_FLAGS);
}
NS_IMETHODIMP
nsTextFrame::List(nsPresContext* aPresContext, FILE* out, PRInt32 aIndent) const
{
// Output the tag
IndentBy(out, aIndent);
ListTag(out);
#ifdef DEBUG_waterson
fprintf(out, " [parent=%p]", mParent);
#endif
if (HasView()) {
fprintf(out, " [view=%p]", NS_STATIC_CAST(void*, GetView()));
}
PRInt32 totalContentLength;
nsAutoString tmp;
ToCString(tmp, &totalContentLength);
// Output the first/last content offset and prev/next in flow info
PRBool isComplete = (mContentOffset + mContentLength) == totalContentLength;
fprintf(out, "[%d,%d,%c] ",
mContentOffset, mContentLength,
isComplete ? 'T':'F');
if (nsnull != mNextSibling) {
fprintf(out, " next=%p", NS_STATIC_CAST(void*, mNextSibling));
}
nsIFrame* prevInFlow = GetPrevInFlow();
if (nsnull != prevInFlow) {
fprintf(out, " prev-in-flow=%p", NS_STATIC_CAST(void*, prevInFlow));
}
if (nsnull != mNextInFlow) {
fprintf(out, " next-in-flow=%p", NS_STATIC_CAST(void*, mNextInFlow));
}
// Output the rect and state
fprintf(out, " {%d,%d,%d,%d}", mRect.x, mRect.y, mRect.width, mRect.height);
if (0 != mState) {
if (mState & NS_FRAME_SELECTED_CONTENT) {
fprintf(out, " [state=%08x] SELECTED", mState);
} else {
fprintf(out, " [state=%08x]", mState);
}
}
fprintf(out, " [content=%p]", NS_STATIC_CAST(void*, mContent));
fprintf(out, " sc=%p", NS_STATIC_CAST(void*, mStyleContext));
nsIAtom* pseudoTag = mStyleContext->GetPseudoType();
if (pseudoTag) {
nsAutoString atomString;
pseudoTag->ToString(atomString);
fprintf(out, " pst=%s",
NS_LossyConvertUCS2toASCII(atomString).get());
}
fputs("<\n", out);
// Output the text
aIndent++;
IndentBy(out, aIndent);
fputs("\"", out);
fputs(NS_LossyConvertUCS2toASCII(tmp).get(), out);
fputs("\"\n", out);
aIndent--;
IndentBy(out, aIndent);
fputs(">\n", out);
return NS_OK;
}
#endif
void nsTextFrame::AdjustSelectionPointsForBidi(SelectionDetails *sdptr,
PRInt32 textLength,
PRBool isRTLChars,
PRBool isOddLevel,
PRBool isBidiSystem)
{
/* This adjustment is required whenever the text has been reversed by
* Mozilla before rendering.
*
* In theory this means any text whose Bidi embedding level has been
* set by the Unicode Bidi algorithm to an odd value, but this is
* only true in practice on a non-Bidi platform.
*
* On a Bidi platform the situation is more complicated because the
* platform will automatically reverse right-to-left characters; so
* Mozilla reverses text whose natural directionality is the opposite
* of its embedding level: right-to-left characters whose Bidi
* embedding level is even (e.g. Visual Hebrew) or left-to-right and
* neutral characters whose Bidi embedding level is odd (e.g. English
* text with <bdo dir="rtl">).
*
* The following condition is accordingly an optimization of
* if ( (!isBidiSystem && isOddLevel) ||
* (isBidiSystem &&
* ((isRTLChars && !isOddLevel) ||
* (!isRTLChars && isOddLevel))))
*/
if (isOddLevel ^ (isRTLChars && isBidiSystem)) {
PRInt32 swap = sdptr->mStart;
sdptr->mStart = textLength - sdptr->mEnd;
sdptr->mEnd = textLength - swap;
// temp fix for 75026 crasher untill we fix the bidi code
// the above bidi code cause mStart < 0 in some case
// the problem is we have whitespace compression code in
// nsTextTransformer which cause mEnd > textLength
NS_ASSERTION((sdptr->mStart >= 0) , "mStart >= 0");
if(sdptr->mStart < 0 )
sdptr->mStart = 0;
NS_ASSERTION((sdptr->mEnd >= 0) , "mEnd >= 0");
if(sdptr->mEnd < 0 )
sdptr->mEnd = 0;
NS_ASSERTION((sdptr->mStart <= sdptr->mEnd), "mStart <= mEnd");
if(sdptr->mStart > sdptr->mEnd)
sdptr->mEnd = sdptr->mStart;
}
return;
}
void
nsTextFrame::AdjustOffsetsForBidi(PRInt32 aStart, PRInt32 aEnd)
{
AddStateBits(NS_FRAME_IS_BIDI);
SetOffsets(aStart, aEnd);
}
void
nsTextFrame::SetOffsets(PRInt32 aStart, PRInt32 aEnd)
{
mContentOffset = aStart;
mContentLength = aEnd - aStart;
}
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