gecko-dev/layout/tables/nsTableColGroupFrame.cpp

813 lines
27 KiB
C++

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
*
* The contents of this file are subject to the Netscape 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/NPL/
*
* 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 Netscape are
* Copyright (C) 1998 Netscape Communications Corporation. All
* Rights Reserved.
*
* Contributor(s):
*/
#include "nsTableColGroupFrame.h"
#include "nsTableColFrame.h"
#include "nsTableFrame.h"
#include "nsIHTMLTableColElement.h"
#include "nsIDOMHTMLTableColElement.h"
#include "nsIReflowCommand.h"
#include "nsIStyleContext.h"
#include "nsStyleConsts.h"
#include "nsIPresContext.h"
#include "nsIHTMLContent.h"
#include "nsHTMLParts.h"
#include "nsHTMLAtoms.h"
#include "nsHTMLIIDs.h"
#include "nsCOMPtr.h"
#include "nsCSSRendering.h"
#include "nsIPresShell.h"
#include "nsLayoutAtoms.h"
#define COLGROUP_TYPE_CONTENT 0x0
#define COLGROUP_TYPE_ANONYMOUS_COL 0x1
#define COLGROUP_TYPE_ANONYMOUS_CELL 0x2
nsTableColGroupType nsTableColGroupFrame::GetType() const {
switch(mBits.mType) {
case COLGROUP_TYPE_ANONYMOUS_COL:
return eColGroupAnonymousCol;
case COLGROUP_TYPE_ANONYMOUS_CELL:
return eColGroupAnonymousCell;
default:
return eColGroupContent;
}
}
void nsTableColGroupFrame::SetType(nsTableColGroupType aType) {
mBits.mType = aType - eColGroupContent;
}
void nsTableColGroupFrame::ResetColIndices(nsIPresContext* aPresContext,
nsIFrame* aFirstColGroup,
PRInt32 aFirstColIndex,
nsIFrame* aStartColFrame)
{
nsTableColGroupFrame* colGroupFrame = (nsTableColGroupFrame*)aFirstColGroup;
PRInt32 colIndex = aFirstColIndex;
while (colGroupFrame) {
nsCOMPtr<nsIAtom> cgType;
colGroupFrame->GetFrameType(getter_AddRefs(cgType));
if (nsLayoutAtoms::tableColGroupFrame == cgType.get()) {
// reset the starting col index for the first cg only if
// aFirstColIndex is smaller than the existing starting col index
if ((colIndex != aFirstColIndex) ||
(colIndex < colGroupFrame->GetStartColumnIndex())) {
colGroupFrame->SetStartColumnIndex(colIndex);
}
nsIFrame* colFrame = aStartColFrame;
if (!colFrame || (colIndex != aFirstColIndex)) {
colGroupFrame->FirstChild(aPresContext, nsnull, &colFrame);
}
while (colFrame) {
nsCOMPtr<nsIAtom> colType;
colFrame->GetFrameType(getter_AddRefs(colType));
if (nsLayoutAtoms::tableColFrame == colType.get()) {
((nsTableColFrame*)colFrame)->SetColIndex(colIndex);
colIndex++;
}
colFrame->GetNextSibling(&colFrame);
}
}
colGroupFrame->GetNextSibling((nsIFrame**)&colGroupFrame);
}
}
NS_IMETHODIMP
nsTableColGroupFrame::AddColsToTable(nsIPresContext& aPresContext,
PRInt32 aFirstColIndex,
PRBool aResetSubsequentColIndices,
nsIFrame* aFirstFrame,
nsIFrame* aLastFrame)
{
nsresult rv = NS_OK;
nsTableFrame* tableFrame = nsnull;
rv = nsTableFrame::GetTableFrame(this, tableFrame);
if (!(NS_SUCCEEDED(rv) && tableFrame && aFirstFrame)) {
return rv;
}
// 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) {
nsIAtom* kidType;
kidFrame->GetFrameType(&kidType);
if (nsLayoutAtoms::tableColFrame == kidType) {
((nsTableColFrame*)kidFrame)->SetColIndex(colIndex);
if (!foundLastFrame) {
mColCount++;
tableFrame->InsertCol(aPresContext, (nsTableColFrame &)*kidFrame, colIndex);
}
colIndex++;
}
NS_IF_RELEASE(kidType);
if (kidFrame == aLastFrame) {
foundLastFrame = PR_TRUE;
}
kidFrame->GetNextSibling(&kidFrame);
}
if (aResetSubsequentColIndices) {
nsIFrame* nextSibling;
GetNextSibling(&nextSibling);
if (nextSibling) {
ResetColIndices(&aPresContext, nextSibling, colIndex);
}
}
return rv;
}
// this is called when a col frame doesn't have an explicit col group parent.
nsTableColGroupFrame*
nsTableColGroupFrame::FindParentForAppendedCol(nsTableFrame* aTableFrame,
nsTableColType aColType)
{
nsVoidArray& cols = aTableFrame->GetColCache();
PRInt32 numCols = cols.Count();
nsIFrame* lastColGroup;
nsIFrame* lastCol = (nsIFrame*)cols.ElementAt(numCols - 1);
if (!lastCol) return nsnull; // no columns so no colgroups
lastCol->GetParent(&lastColGroup);
if (!lastColGroup) return nsnull; // shouldn't happen
nsTableColGroupFrame* relevantColGroup = (nsTableColGroupFrame *)lastColGroup;
nsTableColGroupType relevantColGroupType = relevantColGroup->GetType();
if (eColGroupAnonymousCell == relevantColGroupType) {
if (eColAnonymousCell == aColType) {
return relevantColGroup;
}
else {
// find the next to last col group
for (PRInt32 colX = numCols - 2; colX >= 0; colX--) {
nsTableColFrame* colFrame = (nsTableColFrame*)cols.ElementAt(colX);
nsTableColGroupFrame* colGroupFrame;
colFrame->GetParent((nsIFrame**)&colGroupFrame);
nsTableColGroupType cgType = colGroupFrame->GetType();
if (cgType != relevantColGroupType) {
relevantColGroup = colGroupFrame;
relevantColGroupType = cgType;
break;
}
else if (0 == colX) {
return nsnull;
}
}
}
}
if (eColGroupAnonymousCol == relevantColGroupType) {
if ((eColContent == aColType) || (eColAnonymousCol == aColType)) {
return relevantColGroup;
}
}
return nsnull;
}
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(&next);
if (next) {
nextToLastColGroup = lastColGroup;
lastColGroup = next;
}
else {
break;
}
}
if (!lastColGroup) return PR_TRUE; // there are no col group frames
nsTableColGroupType lastColGroupType = ((nsTableColGroupFrame *)lastColGroup)->GetType();
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(nsIPresContext* aPresContext,
nsIAtom* aListName,
nsIFrame* aChildList)
{
nsTableFrame* tableFrame;
nsTableFrame::GetTableFrame(this, tableFrame);
if (!aChildList) {
nsIFrame* firstChild;
tableFrame->CreateAnonymousColFrames(*aPresContext, *this, GetSpan(), eColAnonymousColGroup,
PR_FALSE, nsnull, &firstChild);
if (firstChild) {
SetInitialChildList(aPresContext, aListName, firstChild);
}
return NS_OK;
}
nsIFrame* kidFrame = aChildList;
while (kidFrame) {
nsIAtom* kidType;
kidFrame->GetFrameType(&kidType);
if (nsLayoutAtoms::tableColFrame == kidType) {
// Set the preliminary values for the column frame
PRInt32 span = ((nsTableColFrame*)kidFrame)->GetSpan();
if (span > 1) {
nsTableColFrame* firstSpannedCol;
tableFrame->CreateAnonymousColFrames(*aPresContext, *this, span - 1, eColAnonymousCol,
PR_FALSE, (nsTableColFrame*)kidFrame, (nsIFrame **)&firstSpannedCol);
nsIFrame* spanner = kidFrame;
kidFrame->GetNextSibling(&kidFrame); // need to do this before we insert the new frames
nsFrameList newChildren(aChildList); // used as a convience to hook up siblings
newChildren.InsertFrames(this, (nsTableColFrame*)spanner, (nsIFrame *)firstSpannedCol);
NS_RELEASE(kidType);
continue;
}
}
NS_IF_RELEASE(kidType);
kidFrame->GetNextSibling(&kidFrame);
}
mFrames.AppendFrames(this, aChildList);
return NS_OK;
}
// Helper function. It marks the table frame as dirty and generates
// a reflow command
nsresult
nsTableColGroupFrame::AddTableDirtyReflowCommand(nsIPresContext* aPresContext,
nsIPresShell& aPresShell,
nsIFrame* aTableFrame)
{
nsFrameState frameState;
nsIFrame* tableParentFrame;
nsIReflowCommand* reflowCmd;
nsresult rv;
// Mark the table frame as dirty
aTableFrame->GetFrameState(&frameState);
frameState |= NS_FRAME_IS_DIRTY;
aTableFrame->SetFrameState(frameState);
// Target the reflow comamnd at its parent frame
aTableFrame->GetParent(&tableParentFrame);
rv = NS_NewHTMLReflowCommand(&reflowCmd, tableParentFrame,
nsIReflowCommand::ReflowDirty);
if (NS_SUCCEEDED(rv)) {
// Add the reflow command
rv = aPresShell.AppendReflowCommand(reflowCmd);
NS_RELEASE(reflowCmd);
}
return rv;
}
NS_IMETHODIMP
nsTableColGroupFrame::AppendFrames(nsIPresContext* aPresContext,
nsIPresShell& aPresShell,
nsIAtom* aListName,
nsIFrame* aFrameList)
{
mFrames.AppendFrames(this, aFrameList);
InsertColsReflow(*aPresContext, aPresShell, mColCount, aFrameList);
return NS_OK;
}
NS_IMETHODIMP
nsTableColGroupFrame::InsertFrames(nsIPresContext* aPresContext,
nsIPresShell& aPresShell,
nsIAtom* aListName,
nsIFrame* aPrevFrameIn,
nsIFrame* aFrameList)
{
nsFrameList frames(aFrameList); // convience for getting last frame
nsIFrame* lastFrame = frames.LastChild();
mFrames.InsertFrames(this, aPrevFrameIn, aFrameList);
nsIFrame* prevFrame = nsTableFrame::GetFrameAtOrBefore(aPresContext, this, aPrevFrameIn,
nsLayoutAtoms::tableColFrame);
PRInt32 colIndex = (prevFrame) ? ((nsTableColFrame*)prevFrame)->GetColIndex() + 1 : 0;
InsertColsReflow(*aPresContext, aPresShell, colIndex, aFrameList, lastFrame);
return NS_OK;
}
void
nsTableColGroupFrame::InsertColsReflow(nsIPresContext& aPresContext,
nsIPresShell& aPresShell,
PRInt32 aColIndex,
nsIFrame* aFirstFrame,
nsIFrame* aLastFrame)
{
AddColsToTable(aPresContext, aColIndex, PR_TRUE, aFirstFrame, aLastFrame);
nsTableFrame* tableFrame;
nsTableFrame::GetTableFrame(this, tableFrame);
tableFrame->InvalidateColumnWidths();
// Generate a reflow command so we reflow the table
AddTableDirtyReflowCommand(&aPresContext, aPresShell, tableFrame);
}
void
nsTableColGroupFrame::RemoveChild(nsIPresContext& aPresContext,
nsTableColFrame& aChild,
PRBool aResetColIndices)
{
PRInt32 colIndex = 0;
nsIFrame* nextChild = nsnull;
if (aResetColIndices) {
colIndex = aChild.GetColIndex();
aChild.GetNextSibling(&nextChild);
}
if (mFrames.DestroyFrame(&aPresContext, (nsIFrame*)&aChild)) {
mColCount--;
if (aResetColIndices) {
ResetColIndices(&aPresContext, this, colIndex, nextChild);
}
}
}
// this removes children form the last col group (eColGroupAnonymousCell) in the
// table only,so there is no need to reset col indices for subsequent col groups.
void
nsTableColGroupFrame::RemoveChildrenAtEnd(nsIPresContext& aPresContext,
PRInt32 aNumChildrenToRemove)
{
PRInt32 numToRemove = aNumChildrenToRemove;
if (numToRemove > mColCount) {
NS_ASSERTION(PR_FALSE, "invalid arg to RemoveChildrenAtEnd");
numToRemove = mColCount;
}
PRInt32 offsetOfFirstRemoval = mColCount - numToRemove;
PRInt32 offsetX = 0;
nsIFrame* kidFrame = mFrames.FirstChild();
while(kidFrame) {
nsIAtom* kidType;
kidFrame->GetFrameType(&kidType);
if (nsLayoutAtoms::tableColFrame == kidType) {
offsetX++;
if (offsetX > offsetOfFirstRemoval) {
nsIFrame* byebye = kidFrame;
kidFrame->GetNextSibling(&kidFrame);
mFrames.DestroyFrame(&aPresContext, byebye);
NS_RELEASE(kidType);
continue;
}
}
NS_IF_RELEASE(kidType);
kidFrame->GetNextSibling(&kidFrame);
}
}
NS_IMETHODIMP
nsTableColGroupFrame::RemoveFrame(nsIPresContext* aPresContext,
nsIPresShell& aPresShell,
nsIAtom* aListName,
nsIFrame* aOldFrame)
{
if (!aOldFrame) return NS_OK;
nsIAtom* frameType = nsnull;
aOldFrame->GetFrameType(&frameType);
if (nsLayoutAtoms::tableColFrame == frameType) {
nsTableColFrame* colFrame = (nsTableColFrame*)aOldFrame;
PRInt32 colIndex = colFrame->GetColIndex();
RemoveChild(*aPresContext, *colFrame, PR_TRUE);
nsTableFrame* tableFrame;
nsTableFrame::GetTableFrame(this, tableFrame);
if (tableFrame) {
tableFrame->RemoveCol(*aPresContext, this, colIndex, PR_TRUE, PR_TRUE);
}
tableFrame->InvalidateColumnWidths();
// Generate a reflow command so we reflow the table
AddTableDirtyReflowCommand(aPresContext, aPresShell, tableFrame);
}
else {
mFrames.DestroyFrame(aPresContext, aOldFrame);
}
NS_IF_RELEASE(frameType);
return NS_OK;
}
NS_METHOD nsTableColGroupFrame::Paint(nsIPresContext* aPresContext,
nsIRenderingContext& aRenderingContext,
const nsRect& aDirtyRect,
nsFramePaintLayer aWhichLayer)
{
PRBool isVisible;
if (NS_SUCCEEDED(IsVisibleForPainting(aPresContext, aRenderingContext, PR_FALSE, &isVisible)) && !isVisible) {
return NS_OK;
}
if (NS_FRAME_PAINT_LAYER_BACKGROUND == aWhichLayer) {
nsCompatibility mode;
aPresContext->GetCompatibilityMode(&mode);
if (eCompatibility_Standard == mode) {
const nsStyleDisplay* disp =
(const nsStyleDisplay*)mStyleContext->GetStyleData(eStyleStruct_Display);
if (disp->IsVisibleOrCollapsed()) {
const nsStyleBorder* border =
(const nsStyleBorder*)mStyleContext->GetStyleData(eStyleStruct_Border);
const nsStyleColor* color =
(const nsStyleColor*)mStyleContext->GetStyleData(eStyleStruct_Color);
nsRect rect(0, 0, mRect.width, mRect.height);
nsCSSRendering::PaintBackground(aPresContext, aRenderingContext, this,
aDirtyRect, rect, *color, *border, 0, 0);
}
}
}
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(nsIPresContext* aPresContext,
const nsPoint& aPoint,
nsFramePaintLayer aWhichLayer,
nsIFrame** aFrame)
{
// this should act like a block, so we need to override
return GetFrameForPointUsing(aPresContext, aPoint, nsnull, aWhichLayer, (aWhichLayer == NS_FRAME_PAINT_LAYER_BACKGROUND), aFrame);
}
NS_METHOD nsTableColGroupFrame::Reflow(nsIPresContext* aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus)
{
DO_GLOBAL_REFLOW_COUNT("nsTableColGroupFrame", aReflowState.reason);
NS_ASSERTION(nsnull!=mContent, "bad state -- null content for frame");
nsresult rv=NS_OK;
// 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(aPresContext, aDesiredSize, aReflowState, aStatus);
}
for (kidFrame = mFrames.FirstChild(); nsnull != kidFrame;
kidFrame->GetNextSibling(&kidFrame)) {
// 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, kidSize, 0, 0, 0);
}
aDesiredSize.width=0;
aDesiredSize.height=0;
aDesiredSize.ascent=aDesiredSize.height;
aDesiredSize.descent=0;
if (nsnull!=aDesiredSize.maxElementSize)
{
aDesiredSize.maxElementSize->width=0;
aDesiredSize.maxElementSize->height=0;
}
aStatus = NS_FRAME_COMPLETE;
return rv;
}
NS_METHOD nsTableColGroupFrame::IncrementalReflow(nsIPresContext* aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus)
{
nsresult rv = NS_OK;
// determine if this frame is the target or not
nsIFrame *target=nsnull;
rv = aReflowState.reflowCommand->GetTarget(target);
if ((PR_TRUE==NS_SUCCEEDED(rv)) && (nsnull!=target))
{
if (this==target)
rv = IR_TargetIsMe(aPresContext, aDesiredSize, aReflowState, aStatus);
else
{
// Get the next frame in the reflow chain
nsIFrame* nextFrame;
aReflowState.reflowCommand->GetNext(nextFrame);
rv = IR_TargetIsChild(aPresContext, aDesiredSize, aReflowState, aStatus, nextFrame);
}
}
return rv;
}
NS_METHOD nsTableColGroupFrame::IR_TargetIsMe(nsIPresContext* aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus)
{
nsresult rv = NS_OK;
aStatus = NS_FRAME_COMPLETE;
nsIReflowCommand::ReflowType type;
aReflowState.reflowCommand->GetType(type);
nsIFrame *objectFrame;
aReflowState.reflowCommand->GetChildFrame(objectFrame);
const nsStyleDisplay *childDisplay=nsnull;
if (nsnull!=objectFrame)
objectFrame->GetStyleData(eStyleStruct_Display, ((const nsStyleStruct *&)childDisplay));
switch (type)
{
case nsIReflowCommand::StyleChanged :
rv = IR_StyleChanged(aPresContext, aDesiredSize, aReflowState, aStatus);
break;
case nsIReflowCommand::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(nsIPresContext* aPresContext,
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 ((NS_SUCCEEDED(rv)) && tableFrame) {
tableFrame->InvalidateColumnWidths();
tableFrame->InvalidateFirstPassCache();
}
return rv;
}
NS_METHOD nsTableColGroupFrame::IR_TargetIsChild(nsIPresContext* aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus,
nsIFrame * aNextFrame)
{
nsresult rv;
// Pass along the reflow command
nsHTMLReflowMetrics desiredSize(nsnull);
nsHTMLReflowState kidReflowState(aPresContext, aReflowState, aNextFrame,
nsSize(aReflowState.availableWidth,
aReflowState.availableHeight));
rv = ReflowChild(aNextFrame, aPresContext, desiredSize, kidReflowState, 0, 0, 0, aStatus);
aNextFrame->DidReflow(aPresContext, NS_FRAME_REFLOW_FINISHED);
if (NS_FAILED(rv))
return rv;
nsTableFrame *tableFrame=nsnull;
rv = nsTableFrame::GetTableFrame(this, tableFrame);
if ((NS_SUCCEEDED(rv)) && (nsnull!=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
tableFrame->InvalidateColumnWidths();
}
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)
{
const nsStyleDisplay *childDisplay;
childFrame->GetStyleData(eStyleStruct_Display, ((const nsStyleStruct *&)childDisplay));
if (NS_STYLE_DISPLAY_TABLE_COLUMN == childDisplay->mDisplay)
{
result = (nsTableColFrame *)childFrame;
break;
}
childFrame->GetNextSibling(&childFrame);
}
return result;
}
nsTableColFrame * nsTableColGroupFrame::GetColumnAt (PRInt32 aColIndex)
{
nsTableColFrame *result = nsnull;
PRInt32 count = 0;
nsIFrame *childFrame = mFrames.FirstChild();
while (nsnull!=childFrame) {
const nsStyleDisplay *childDisplay;
childFrame->GetStyleData(eStyleStruct_Display, ((const nsStyleStruct *&)childDisplay));
if (NS_STYLE_DISPLAY_TABLE_COLUMN == childDisplay->mDisplay) {
nsTableColFrame *col = (nsTableColFrame *)childFrame;
count++;
if (aColIndex<=count) {
result = col;
}
}
childFrame->GetNextSibling(&childFrame);
}
return result;
}
PRInt32 nsTableColGroupFrame::GetSpan()
{
PRInt32 span = 1;
nsCOMPtr<nsIContent> iContent;
nsresult rv = GetContent(getter_AddRefs(iContent));
if (NS_FAILED(rv) || !iContent) return rv;
// col group element derives from col element
nsIDOMHTMLTableColElement* cgContent = nsnull;
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;
}
/** returns colcount because it is frequently used in the context of
* shuffling relative colgroup order, and it's convenient to not have to
* call GetColumnCount redundantly.
*/
PRInt32 nsTableColGroupFrame::SetStartColumnIndex (int aIndex)
{
PRInt32 result = mColCount;
if (aIndex != mStartColIndex) {
mStartColIndex = aIndex;
result = GetColCount();
}
return result;
}
// this could be optimized by using col group frame starting indicies,
// but typically there aren't enough very large col groups for the added complexity.
nsTableColGroupFrame*
nsTableColGroupFrame::GetColGroupFrameContaining(nsIPresContext* aPresContext,
nsFrameList& aColGroupList,
nsTableColFrame& aColFrame)
{
nsIFrame* childFrame = aColGroupList.FirstChild();
while (childFrame) {
nsIAtom* frameType = nsnull;
childFrame->GetFrameType(&frameType);
if (nsLayoutAtoms::tableColGroupFrame == frameType) {
nsTableColFrame* colFrame = nsnull;
childFrame->FirstChild(aPresContext, nsnull, (nsIFrame **)&colFrame);
while (colFrame) {
if (colFrame == &aColFrame) {
NS_RELEASE(frameType);
return (nsTableColGroupFrame *)childFrame;
}
colFrame->GetNextSibling((nsIFrame **)&colFrame);
}
}
NS_IF_RELEASE(frameType);
childFrame->GetNextSibling(&childFrame);
}
return nsnull;
}
void nsTableColGroupFrame::DeleteColFrame(nsIPresContext* aPresContext, nsTableColFrame* aColFrame)
{
mFrames.DestroyFrame(aPresContext, aColFrame);
}
/* ----- 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(nsIPresContext* aPresContext,
nsIContent* aContent,
nsIFrame* aParent,
nsIStyleContext* 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;
}
NS_IMETHODIMP
nsTableColGroupFrame::GetFrameType(nsIAtom** aType) const
{
NS_PRECONDITION(nsnull != aType, "null OUT parameter pointer");
*aType = nsLayoutAtoms::tableColGroupFrame;
NS_ADDREF(*aType);
return NS_OK;
}
#ifdef DEBUG
NS_IMETHODIMP
nsTableColGroupFrame::GetFrameName(nsString& aResult) const
{
return MakeFrameName("TableColGroup", aResult);
}
NS_IMETHODIMP
nsTableColGroupFrame::SizeOf(nsISizeOfHandler* aHandler, PRUint32* aResult) const
{
if (!aResult) {
return NS_ERROR_NULL_POINTER;
}
PRUint32 sum = sizeof(*this);
*aResult = sum;
return NS_OK;
}
#endif