RetroZilla/layout/tables/nsTableColGroupFrame.cpp

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2015-10-21 05:03:22 +02:00
/* -*- 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):
*
* 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 "nsTableColGroupFrame.h"
#include "nsTableColFrame.h"
#include "nsTableFrame.h"
#include "nsIDOMHTMLTableColElement.h"
#include "nsReflowPath.h"
#include "nsStyleContext.h"
#include "nsStyleConsts.h"
#include "nsPresContext.h"
#include "nsHTMLParts.h"
#include "nsHTMLAtoms.h"
#include "nsCOMPtr.h"
#include "nsCSSRendering.h"
#include "nsIPresShell.h"
#include "nsLayoutAtoms.h"
#define COL_GROUP_TYPE_BITS 0xC0000000 // uses bits 31-32 from mState
#define COL_GROUP_TYPE_OFFSET 30
nsTableColGroupType
nsTableColGroupFrame::GetColType() const
{
return (nsTableColGroupType)((mState & COL_GROUP_TYPE_BITS) >> COL_GROUP_TYPE_OFFSET);
}
void nsTableColGroupFrame::SetColType(nsTableColGroupType aType)
{
PRUint32 type = aType - eColGroupContent;
mState |= (type << COL_GROUP_TYPE_OFFSET);
}
void nsTableColGroupFrame::ResetColIndices(nsIFrame* aFirstColGroup,
PRInt32 aFirstColIndex,
nsIFrame* aStartColFrame)
{
nsTableColGroupFrame* colGroupFrame = (nsTableColGroupFrame*)aFirstColGroup;
PRInt32 colIndex = aFirstColIndex;
while (colGroupFrame) {
if (nsLayoutAtoms::tableColGroupFrame == colGroupFrame->GetType()) {
// reset the starting col index for the first cg only if we should reset
// the whole colgroup (aStartColFrame defaults to nsnull) or if
// aFirstColIndex is smaller than the existing starting col index
if ((colIndex != aFirstColIndex) ||
(colIndex < colGroupFrame->GetStartColumnIndex()) ||
!aStartColFrame) {
colGroupFrame->SetStartColumnIndex(colIndex);
}
nsIFrame* colFrame = aStartColFrame;
if (!colFrame || (colIndex != aFirstColIndex)) {
colFrame = colGroupFrame->GetFirstChild(nsnull);
}
while (colFrame) {
if (nsLayoutAtoms::tableColFrame == colFrame->GetType()) {
((nsTableColFrame*)colFrame)->SetColIndex(colIndex);
colIndex++;
}
colFrame = colFrame->GetNextSibling();
}
}
colGroupFrame = NS_STATIC_CAST(nsTableColGroupFrame*,
colGroupFrame->GetNextSibling());
}
}
nsresult
nsTableColGroupFrame::AddColsToTable(PRInt32 aFirstColIndex,
PRBool aResetSubsequentColIndices,
nsIFrame* aFirstFrame,
nsIFrame* aLastFrame)
{
nsresult rv = NS_OK;
nsTableFrame* tableFrame = nsnull;
rv = nsTableFrame::GetTableFrame(this, tableFrame);
if (!tableFrame || !aFirstFrame) return NS_ERROR_NULL_POINTER;
// set the col indices of the col frames and and add col info to the table
PRInt32 colIndex = aFirstColIndex;
nsIFrame* kidFrame = aFirstFrame;
PRBool foundLastFrame = PR_FALSE;
while (kidFrame) {
if (nsLayoutAtoms::tableColFrame == kidFrame->GetType()) {
((nsTableColFrame*)kidFrame)->SetColIndex(colIndex);
if (!foundLastFrame) {
mColCount++;
tableFrame->InsertCol((nsTableColFrame &)*kidFrame, colIndex);
}
colIndex++;
}
if (kidFrame == aLastFrame) {
foundLastFrame = PR_TRUE;
}
kidFrame = kidFrame->GetNextSibling();
}
// We have already set the colindex for all the colframes in this
// colgroup that come after the first inserted colframe, but there could
// be other colgroups following this one and their colframes need
// correct colindices too.
if (aResetSubsequentColIndices && GetNextSibling()) {
ResetColIndices(GetNextSibling(), colIndex);
}
return rv;
}
PRBool
nsTableColGroupFrame::GetLastRealColGroup(nsTableFrame* aTableFrame,
nsIFrame** aLastColGroup)
{
*aLastColGroup = nsnull;
nsFrameList colGroups = aTableFrame->GetColGroups();
nsIFrame* nextToLastColGroup = nsnull;
nsIFrame* lastColGroup = colGroups.FirstChild();
while(lastColGroup) {
nsIFrame* next = lastColGroup->GetNextSibling();
if (next) {
nextToLastColGroup = lastColGroup;
lastColGroup = next;
}
else {
break;
}
}
if (!lastColGroup) return PR_TRUE; // there are no col group frames
nsTableColGroupType lastColGroupType =
((nsTableColGroupFrame *)lastColGroup)->GetColType();
if (eColGroupAnonymousCell == lastColGroupType) {
*aLastColGroup = nextToLastColGroup;
return PR_FALSE;
}
else {
*aLastColGroup = lastColGroup;
return PR_TRUE;
}
}
// don't set mColCount here, it is done in AddColsToTable
NS_IMETHODIMP
nsTableColGroupFrame::SetInitialChildList(nsPresContext* aPresContext,
nsIAtom* aListName,
nsIFrame* aChildList)
{
nsTableFrame* tableFrame;
nsTableFrame::GetTableFrame(this, tableFrame);
if (!tableFrame) return NS_ERROR_NULL_POINTER;
if (!aChildList) {
nsIFrame* firstChild;
tableFrame->CreateAnonymousColFrames(this, GetSpan(), eColAnonymousColGroup,
PR_FALSE, nsnull, &firstChild);
if (firstChild) {
SetInitialChildList(aPresContext, aListName, firstChild);
}
return NS_OK;
}
mFrames.AppendFrames(this, aChildList);
return NS_OK;
}
NS_IMETHODIMP
nsTableColGroupFrame::AppendFrames(nsIAtom* aListName,
nsIFrame* aFrameList)
{
nsTableColFrame* col = GetFirstColumn();
nsTableColFrame* nextCol;
while (col && col->GetColType() == eColAnonymousColGroup) {
// this colgroup spans one or more columns but now that there is a
// real column below, spanned anonymous columns should be removed
nextCol = col->GetNextCol();
RemoveFrame(nsnull, col);
col = nextCol;
}
mFrames.AppendFrames(this, aFrameList);
InsertColsReflow(GetStartColumnIndex() + mColCount, aFrameList);
return NS_OK;
}
NS_IMETHODIMP
nsTableColGroupFrame::InsertFrames(nsIAtom* aListName,
nsIFrame* aPrevFrameIn,
nsIFrame* aFrameList)
{
nsFrameList frames(aFrameList); // convience for getting last frame
nsIFrame* lastFrame = frames.LastChild();
nsTableColFrame* col = GetFirstColumn();
nsTableColFrame* nextCol;
while (col && col->GetColType() == eColAnonymousColGroup) {
// this colgroup spans one or more columns but now that there is
// real column below, spanned anonymous columns should be removed
nextCol = col->GetNextCol();
RemoveFrame(nsnull, col);
col = nextCol;
}
mFrames.InsertFrames(this, aPrevFrameIn, aFrameList);
nsIFrame* prevFrame = nsTableFrame::GetFrameAtOrBefore(this, aPrevFrameIn,
nsLayoutAtoms::tableColFrame);
PRInt32 colIndex = (prevFrame) ? ((nsTableColFrame*)prevFrame)->GetColIndex() + 1 : GetStartColumnIndex();
InsertColsReflow(colIndex, aFrameList, lastFrame);
return NS_OK;
}
void
nsTableColGroupFrame::InsertColsReflow(PRInt32 aColIndex,
nsIFrame* aFirstFrame,
nsIFrame* aLastFrame)
{
AddColsToTable(aColIndex, PR_TRUE, aFirstFrame, aLastFrame);
nsTableFrame* tableFrame;
nsTableFrame::GetTableFrame(this, tableFrame);
if (!tableFrame) return;
// XXX this could be optimized with much effort
tableFrame->SetNeedStrategyInit(PR_TRUE);
// Generate a reflow command so we reflow the table
nsTableFrame::AppendDirtyReflowCommand(tableFrame);
}
void
nsTableColGroupFrame::RemoveChild(nsTableColFrame& aChild,
PRBool aResetSubsequentColIndices)
{
PRInt32 colIndex = 0;
nsIFrame* nextChild = nsnull;
if (aResetSubsequentColIndices) {
colIndex = aChild.GetColIndex();
nextChild = aChild.GetNextSibling();
}
if (mFrames.DestroyFrame(GetPresContext(), (nsIFrame*)&aChild)) {
mColCount--;
if (aResetSubsequentColIndices) {
if (nextChild) { // reset inside this and all following colgroups
ResetColIndices(this, colIndex, nextChild);
}
else {
nsIFrame* nextGroup = GetNextSibling();
if (nextGroup) // reset next and all following colgroups
ResetColIndices(nextGroup, colIndex);
}
}
}
nsTableFrame* tableFrame;
nsTableFrame::GetTableFrame(this, tableFrame);
if (!tableFrame) return;
// XXX this could be optimized with much effort
tableFrame->SetNeedStrategyInit(PR_TRUE);
// Generate a reflow command so we reflow the table
nsTableFrame::AppendDirtyReflowCommand(tableFrame);
}
NS_IMETHODIMP
nsTableColGroupFrame::RemoveFrame(nsIAtom* aListName,
nsIFrame* aOldFrame)
{
if (!aOldFrame) return NS_OK;
if (nsLayoutAtoms::tableColFrame == aOldFrame->GetType()) {
nsTableColFrame* colFrame = (nsTableColFrame*)aOldFrame;
PRInt32 colIndex = colFrame->GetColIndex();
RemoveChild(*colFrame, PR_TRUE);
nsTableFrame* tableFrame;
nsTableFrame::GetTableFrame(this, tableFrame);
if (!tableFrame) return NS_ERROR_NULL_POINTER;
tableFrame->RemoveCol(this, colIndex, PR_TRUE, PR_TRUE);
// XXX This could probably be optimized with much effort
tableFrame->SetNeedStrategyInit(PR_TRUE);
// Generate a reflow command so we reflow the table
nsTableFrame::AppendDirtyReflowCommand(tableFrame);
}
else {
mFrames.DestroyFrame(GetPresContext(), aOldFrame);
}
return NS_OK;
}
NS_METHOD
nsTableColGroupFrame::Paint(nsPresContext* aPresContext,
nsIRenderingContext& aRenderingContext,
const nsRect& aDirtyRect,
nsFramePaintLayer aWhichLayer,
PRUint32 aFlags)
{
PRBool isVisible;
if (NS_SUCCEEDED(IsVisibleForPainting(aPresContext, aRenderingContext, PR_FALSE, &isVisible)) && !isVisible) {
return NS_OK;
}
PaintChildren(aPresContext, aRenderingContext, aDirtyRect, aWhichLayer);
return NS_OK;
}
PRIntn
nsTableColGroupFrame::GetSkipSides() const
{
PRIntn skip = 0;
if (nsnull != mPrevInFlow) {
skip |= 1 << NS_SIDE_TOP;
}
if (nsnull != mNextInFlow) {
skip |= 1 << NS_SIDE_BOTTOM;
}
return skip;
}
NS_IMETHODIMP
nsTableColGroupFrame::GetFrameForPoint(const nsPoint& aPoint,
nsFramePaintLayer aWhichLayer,
nsIFrame** aFrame)
{
// this should act like a block, so we need to override
return GetFrameForPointUsing(aPoint, nsnull, aWhichLayer, PR_FALSE, aFrame);
}
NS_METHOD nsTableColGroupFrame::Reflow(nsPresContext* aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus)
{
DO_GLOBAL_REFLOW_COUNT("nsTableColGroupFrame", aReflowState.reason);
DISPLAY_REFLOW(aPresContext, this, aReflowState, aDesiredSize, aStatus);
NS_ASSERTION(nsnull!=mContent, "bad state -- null content for frame");
nsresult rv=NS_OK;
const nsStyleVisibility* groupVis = GetStyleVisibility();
PRBool collapseGroup = (NS_STYLE_VISIBILITY_COLLAPSE == groupVis->mVisible);
if (collapseGroup) {
nsTableFrame* tableFrame = nsnull;
nsTableFrame::GetTableFrame(this, tableFrame);
if (tableFrame) {
tableFrame->SetNeedToCollapseColumns(PR_TRUE);
}
}
// for every content child that (is a column thingy and does not already have a frame)
// create a frame and adjust it's style
nsIFrame* kidFrame = nsnull;
if (eReflowReason_Incremental == aReflowState.reason) {
rv = IncrementalReflow(aDesiredSize, aReflowState, aStatus);
}
for (kidFrame = mFrames.FirstChild(); kidFrame;
kidFrame = kidFrame->GetNextSibling()) {
// Give the child frame a chance to reflow, even though we know it'll have 0 size
nsHTMLReflowMetrics kidSize(nsnull);
// XXX Use a valid reason...
nsHTMLReflowState kidReflowState(aPresContext, aReflowState, kidFrame,
nsSize(0,0), eReflowReason_Initial);
nsReflowStatus status;
ReflowChild(kidFrame, aPresContext, kidSize, kidReflowState, 0, 0, 0, status);
FinishReflowChild(kidFrame, aPresContext, nsnull, kidSize, 0, 0, 0);
}
aDesiredSize.width=0;
aDesiredSize.height=0;
aDesiredSize.ascent=aDesiredSize.height;
aDesiredSize.descent=0;
if (aDesiredSize.mComputeMEW)
{
aDesiredSize.mMaxElementWidth=0;
}
aStatus = NS_FRAME_COMPLETE;
NS_FRAME_SET_TRUNCATION(aStatus, aReflowState, aDesiredSize);
return rv;
}
NS_METHOD nsTableColGroupFrame::IncrementalReflow(nsHTMLReflowMetrics& aDesiredSize,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus)
{
// the col group is a target if its path has a reflow command
nsHTMLReflowCommand* command = aReflowState.path->mReflowCommand;
if (command)
IR_TargetIsMe(aDesiredSize, aReflowState, aStatus);
// see if the chidren are targets as well
nsReflowPath::iterator iter = aReflowState.path->FirstChild();
nsReflowPath::iterator end = aReflowState.path->EndChildren();
for (; iter != end; ++iter)
IR_TargetIsChild(aDesiredSize, aReflowState, aStatus, *iter);
return NS_OK;
}
NS_METHOD nsTableColGroupFrame::IR_TargetIsMe(nsHTMLReflowMetrics& aDesiredSize,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus)
{
nsresult rv = NS_OK;
aStatus = NS_FRAME_COMPLETE;
switch (aReflowState.path->mReflowCommand->Type())
{
case eReflowType_StyleChanged :
rv = IR_StyleChanged(aDesiredSize, aReflowState, aStatus);
break;
case eReflowType_ContentChanged :
NS_ASSERTION(PR_FALSE, "illegal reflow type: ContentChanged");
rv = NS_ERROR_ILLEGAL_VALUE;
break;
default:
NS_NOTYETIMPLEMENTED("unexpected reflow command type");
rv = NS_ERROR_NOT_IMPLEMENTED;
break;
}
return rv;
}
NS_METHOD nsTableColGroupFrame::IR_StyleChanged(nsHTMLReflowMetrics& aDesiredSize,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus)
{
nsresult rv = NS_OK;
// we presume that all the easy optimizations were done in the nsHTMLStyleSheet before we were called here
// XXX: we can optimize this when we know which style attribute changed
nsTableFrame* tableFrame = nsnull;
rv = nsTableFrame::GetTableFrame(this, tableFrame);
if (tableFrame) {
tableFrame->SetNeedStrategyInit(PR_TRUE);
}
return rv;
}
NS_METHOD nsTableColGroupFrame::IR_TargetIsChild(nsHTMLReflowMetrics& aDesiredSize,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus,
nsIFrame * aNextFrame)
{
nsresult rv;
// Pass along the reflow command
nsHTMLReflowMetrics desiredSize(nsnull);
nsPresContext* presContext = GetPresContext();
nsHTMLReflowState kidReflowState(presContext, aReflowState, aNextFrame,
nsSize(aReflowState.availableWidth,
aReflowState.availableHeight));
rv = ReflowChild(aNextFrame, presContext, desiredSize, kidReflowState, 0, 0, 0, aStatus);
aNextFrame->DidReflow(presContext, nsnull, NS_FRAME_REFLOW_FINISHED);
if (NS_FAILED(rv))
return rv;
nsTableFrame *tableFrame=nsnull;
rv = nsTableFrame::GetTableFrame(this, tableFrame);
if (tableFrame) {
// compare the new col count to the old col count.
// If they are the same, we just need to rebalance column widths
// If they differ, we need to fix up other column groups and the column cache
// XXX for now assume the worse
tableFrame->SetNeedStrategyInit(PR_TRUE);
}
return rv;
}
nsTableColFrame * nsTableColGroupFrame::GetFirstColumn()
{
return GetNextColumn(nsnull);
}
nsTableColFrame * nsTableColGroupFrame::GetNextColumn(nsIFrame *aChildFrame)
{
nsTableColFrame *result = nsnull;
nsIFrame *childFrame = aChildFrame;
if (nsnull==childFrame)
childFrame = mFrames.FirstChild();
while (nsnull!=childFrame)
{
if (NS_STYLE_DISPLAY_TABLE_COLUMN ==
childFrame->GetStyleDisplay()->mDisplay)
{
result = (nsTableColFrame *)childFrame;
break;
}
childFrame = childFrame->GetNextSibling();
}
return result;
}
PRInt32 nsTableColGroupFrame::GetSpan()
{
PRInt32 span = 1;
nsIContent* iContent = GetContent();
if (!iContent) return NS_OK;
// col group element derives from col element
nsIDOMHTMLTableColElement* cgContent = nsnull;
nsresult rv = iContent->QueryInterface(NS_GET_IID(nsIDOMHTMLTableColElement),
(void **)&cgContent);
if (cgContent && NS_SUCCEEDED(rv)) {
cgContent->GetSpan(&span);
// XXX why does this work!!
if (span == -1) {
span = 1;
}
NS_RELEASE(cgContent);
}
return span;
}
void nsTableColGroupFrame::SetContinuousBCBorderWidth(PRUint8 aForSide,
BCPixelSize aPixelValue)
{
switch (aForSide) {
case NS_SIDE_TOP:
mTopContBorderWidth = aPixelValue;
return;
case NS_SIDE_BOTTOM:
mBottomContBorderWidth = aPixelValue;
return;
default:
NS_ERROR("invalid side arg");
}
}
void nsTableColGroupFrame::GetContinuousBCBorderWidth(float aPixelsToTwips,
nsMargin& aBorder)
{
nsTableFrame* table;
nsTableFrame::GetTableFrame(this, table);
nsTableColFrame* col = table->GetColFrame(mStartColIndex + mColCount - 1);
col->GetContinuousBCBorderWidth(aPixelsToTwips, aBorder);
aBorder.top = BC_BORDER_BOTTOM_HALF_COORD(aPixelsToTwips,
mTopContBorderWidth);
aBorder.bottom = BC_BORDER_TOP_HALF_COORD(aPixelsToTwips,
mBottomContBorderWidth);
return;
}
/* ----- global methods ----- */
nsresult
NS_NewTableColGroupFrame(nsIPresShell* aPresShell, nsIFrame** aNewFrame)
{
NS_PRECONDITION(aNewFrame, "null OUT ptr");
if (nsnull == aNewFrame) {
return NS_ERROR_NULL_POINTER;
}
nsTableColGroupFrame* it = new (aPresShell) nsTableColGroupFrame;
if (nsnull == it) {
return NS_ERROR_OUT_OF_MEMORY;
}
*aNewFrame = it;
return NS_OK;
}
NS_IMETHODIMP
nsTableColGroupFrame::Init(nsPresContext* aPresContext,
nsIContent* aContent,
nsIFrame* aParent,
nsStyleContext* aContext,
nsIFrame* aPrevInFlow)
{
nsresult rv;
// Let the base class do its processing
rv = nsHTMLContainerFrame::Init(aPresContext, aContent, aParent, aContext,
aPrevInFlow);
// record that children that are ignorable whitespace should be excluded
mState |= NS_FRAME_EXCLUDE_IGNORABLE_WHITESPACE;
return rv;
}
nsIAtom*
nsTableColGroupFrame::GetType() const
{
return nsLayoutAtoms::tableColGroupFrame;
}
#ifdef DEBUG
NS_IMETHODIMP
nsTableColGroupFrame::GetFrameName(nsAString& aResult) const
{
return MakeFrameName(NS_LITERAL_STRING("TableColGroup"), aResult);
}
void nsTableColGroupFrame::Dump(PRInt32 aIndent)
{
char* indent = new char[aIndent + 1];
if (!indent) return;
for (PRInt32 i = 0; i < aIndent + 1; i++) {
indent[i] = ' ';
}
indent[aIndent] = 0;
printf("%s**START COLGROUP DUMP**\n%s startcolIndex=%d colcount=%d span=%d coltype=",
indent, indent, GetStartColumnIndex(), GetColCount(), GetSpan());
nsTableColGroupType colType = GetColType();
switch (colType) {
case eColGroupContent:
printf(" content ");
break;
case eColGroupAnonymousCol:
printf(" anonymous-column ");
break;
case eColGroupAnonymousCell:
printf(" anonymous-cell ");
break;
}
// verify the colindices
PRInt32 j = GetStartColumnIndex();
nsTableColFrame* col = GetFirstColumn();
while (col) {
NS_ASSERTION(j == col->GetColIndex(), "wrong colindex on col frame");
col = col->GetNextCol();
j++;
}
NS_ASSERTION((j - GetStartColumnIndex()) == GetColCount(),
"number of cols out of sync");
printf("\n%s**END COLGROUP DUMP** ", indent);
delete [] indent;
}
#endif