gecko-dev/layout/tables/nsTableOuterFrame.cpp

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C++
Исходник Обычный вид История

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/* -*- 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 1.0 (the "NPL"); you may not use this file except in
* compliance with the NPL. You may obtain a copy of the NPL at
* http://www.mozilla.org/NPL/
*
* Software distributed under the NPL is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
* for the specific language governing rights and limitations under the
* NPL.
*
* The Initial Developer of this code under the NPL is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1998 Netscape Communications Corporation. All Rights
* Reserved.
*/
#include "nsTableOuterFrame.h"
#include "nsTableFrame.h"
#include "nsITableContent.h"
#include "nsTableContent.h"
#include "nsBodyFrame.h"
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#include "nsIReflowCommand.h"
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#include "nsIStyleContext.h"
#include "nsStyleConsts.h"
#include "nsIPresContext.h"
#include "nsIRenderingContext.h"
#include "nsCSSRendering.h"
#include "nsIContent.h"
#include "nsIContentDelegate.h"
#include "nsCSSLayout.h"
#include "nsVoidArray.h"
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#include "nsIReflowCommand.h"
#include "nsIPtr.h"
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#ifdef NS_DEBUG
static PRBool gsDebug = PR_FALSE;
//#define NOISY
//#define NOISY_FLOW
#define NOISY_MARGINS
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#else
static const PRBool gsDebug = PR_FALSE;
#endif
static NS_DEFINE_IID(kITableContentIID, NS_ITABLECONTENT_IID);
NS_DEF_PTR(nsIStyleContext);
NS_DEF_PTR(nsIContent);
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struct OuterTableReflowState {
// The presentation context
nsIPresContext *pc;
// Our reflow state
const nsReflowState& reflowState;
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// The total available size (computed from the parent)
nsSize availSize;
// The available size for the inner table frame
nsSize innerTableMaxSize;
// Margin tracking information
nscoord prevMaxPosBottomMargin;
nscoord prevMaxNegBottomMargin;
// Flags for whether the max size is unconstrained
PRBool unconstrainedWidth;
PRBool unconstrainedHeight;
// Running y-offset
nscoord y;
// Flags for where we are in the content
PRBool firstRowGroup;
PRBool processingCaption;
OuterTableReflowState(nsIPresContext* aPresContext,
const nsReflowState& aReflowState)
: reflowState(aReflowState)
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{
pc = aPresContext;
availSize.width = reflowState.maxSize.width;
availSize.height = reflowState.maxSize.height;
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prevMaxPosBottomMargin = 0;
prevMaxNegBottomMargin = 0;
y=0; // border/padding/margin???
unconstrainedWidth = PRBool(aReflowState.maxSize.width == NS_UNCONSTRAINEDSIZE);
unconstrainedHeight = PRBool(aReflowState.maxSize.height == NS_UNCONSTRAINEDSIZE);
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firstRowGroup = PR_TRUE;
processingCaption = PR_FALSE;
innerTableMaxSize.width=0;
innerTableMaxSize.height=0;
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}
~OuterTableReflowState() {
}
};
/* ----------- nsTableOuterFrame ---------- */
/**
*/
nsTableOuterFrame::nsTableOuterFrame(nsIContent* aContent, nsIFrame* aParentFrame)
: nsContainerFrame(aContent, aParentFrame),
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mInnerTableFrame(nsnull),
mCaptionFrames(nsnull),
mBottomCaptions(nsnull),
mMinCaptionWidth(0),
mMaxCaptionWidth(0),
mDesiredSize(nsnull)
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{
}
nsTableOuterFrame::~nsTableOuterFrame()
{
if (nsnull!=mCaptionFrames)
delete mCaptionFrames;
if (nsnull!=mBottomCaptions)
delete mBottomCaptions;
}
NS_METHOD nsTableOuterFrame::Paint(nsIPresContext& aPresContext,
nsIRenderingContext& aRenderingContext,
const nsRect& aDirtyRect)
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{
// for debug...
if (nsIFrame::GetShowFrameBorders()) {
aRenderingContext.SetColor(NS_RGB(255,0,0));
aRenderingContext.DrawRect(0, 0, mRect.width, mRect.height);
}
PaintChildren(aPresContext, aRenderingContext, aDirtyRect);
return NS_OK;
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}
PRBool nsTableOuterFrame::NeedsReflow(const nsSize& aMaxSize)
{
PRBool result=PR_TRUE;
if (nsnull!=mInnerTableFrame)
result = mInnerTableFrame->NeedsReflow(aMaxSize);
return result;
}
// Recover the reflow state to what it should be if aKidFrame is about
// to be reflowed
nsresult nsTableOuterFrame::RecoverState(OuterTableReflowState& aState,
nsIFrame* aKidFrame)
{
// Get aKidFrame's previous sibling
nsIFrame* prevKidFrame = nsnull;
for (nsIFrame* frame = mFirstChild; frame != aKidFrame;) {
prevKidFrame = frame;
frame->GetNextSibling(frame);
}
if (nsnull != prevKidFrame) {
nsRect rect;
// Set our running y-offset
prevKidFrame->GetRect(rect);
aState.y = rect.YMost();
// Adjust the available space
if (PR_FALSE == aState.unconstrainedHeight) {
aState.availSize.height -= aState.y;
}
// Get the previous frame's bottom margin
const nsStyleSpacing* kidSpacing;
prevKidFrame->GetStyleData(eStyleStruct_Spacing, (nsStyleStruct *&)kidSpacing);
nsMargin margin;
kidSpacing->CalcMarginFor(prevKidFrame, margin);
if (margin.bottom < 0) {
aState.prevMaxNegBottomMargin = -margin.bottom;
} else {
aState.prevMaxPosBottomMargin = margin.bottom;
}
}
// Set the inner table max size
nsSize innerTableSize(0,0);
mInnerTableFrame->GetSize(innerTableSize);
aState.innerTableMaxSize.width = innerTableSize.width;
aState.innerTableMaxSize.height = aState.reflowState.maxSize.height;
return NS_OK;
}
nsresult nsTableOuterFrame::AdjustSiblingsAfterReflow(nsIPresContext* aPresContext,
OuterTableReflowState& aState,
nsIFrame* aKidFrame,
nscoord aDeltaY)
{
nsIFrame* lastKidFrame = aKidFrame;
if (aDeltaY != 0) {
// Move the frames that follow aKidFrame by aDeltaY
nsIFrame* kidFrame;
aKidFrame->GetNextSibling(kidFrame);
while (nsnull != kidFrame) {
nsPoint origin;
// XXX We can't just slide the child if it has a next-in-flow
kidFrame->GetOrigin(origin);
origin.y += aDeltaY;
// XXX We need to send move notifications to the frame...
kidFrame->WillReflow(*aPresContext);
kidFrame->MoveTo(origin.x, origin.y);
// Get the next frame
lastKidFrame = kidFrame;
kidFrame->GetNextSibling(kidFrame);
}
} else {
// Get the last frame
LastChild(lastKidFrame);
}
// Update our running y-offset to reflect the bottommost child
nsRect rect;
lastKidFrame->GetRect(rect);
aState.y = rect.YMost();
// Get the bottom margin for the last child frame
const nsStyleSpacing* kidSpacing;
lastKidFrame->GetStyleData(eStyleStruct_Spacing, (nsStyleStruct *&)kidSpacing);
nsMargin margin;
kidSpacing->CalcMarginFor(lastKidFrame, margin);
if (margin.bottom < 0) {
aState.prevMaxNegBottomMargin = -margin.bottom;
} else {
aState.prevMaxPosBottomMargin = margin.bottom;
}
return NS_OK;
}
nsresult nsTableOuterFrame::IncrementalReflow(nsIPresContext* aPresContext,
OuterTableReflowState& aState,
nsReflowMetrics& aDesiredSize,
const nsReflowState& aReflowState,
nsReflowStatus& aStatus)
{
// Get the next frame in the reflow chain
nsIFrame* kidFrame;
aReflowState.reflowCommand->GetNext(kidFrame);
// Recover our reflow state
RecoverState(aState, kidFrame);
// Pass along the reflow command
// XXX Check if we're the target...
nsSize kidMaxElementSize(0,0);
nsSize* pKidMaxElementSize = (nsnull != aDesiredSize.maxElementSize) ?
&kidMaxElementSize : nsnull;
nsReflowMetrics kidSize(pKidMaxElementSize);
nsRect oldKidRect;
kidFrame->GetRect(oldKidRect);
SetReflowState(aState, kidFrame);
// Get the top margin for the child
const nsStyleSpacing* kidSpacing;
kidFrame->GetStyleData(eStyleStruct_Spacing, (nsStyleStruct *&)kidSpacing);
nsMargin kidMargin;
kidSpacing->CalcMarginFor(kidFrame, kidMargin);
nscoord topMargin = GetTopMarginFor(aPresContext, aState, kidMargin);
nscoord bottomMargin = kidMargin.bottom;
// Figure out the amount of available size for the child (subtract
// off the top margin we are going to apply to it)
if (PR_FALSE == aState.unconstrainedHeight) {
aState.availSize.height -= topMargin;
}
// Subtract off for left and right margin
if (PR_FALSE == aState.unconstrainedWidth) {
aState.availSize.width -= kidMargin.left + kidMargin.right;
}
// Now do the reflow
aState.y += topMargin;
kidFrame->WillReflow(*aPresContext);
kidFrame->MoveTo(kidMargin.left, aState.y);
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nsReflowState kidReflowState(kidFrame, aState.reflowState, aState.availSize);
if (kidFrame != mInnerTableFrame) {
// Reflow captions to the width of the inner table
kidReflowState.maxSize.width = aState.innerTableMaxSize.width;
}
mInnerTableFrame->SetReflowPass(nsTableFrame::kPASS_INCREMENTAL);
aStatus = ReflowChild(kidFrame, aPresContext, kidSize, kidReflowState,
pKidMaxElementSize, aState);
// Place the child frame after taking into account its margin
nsRect kidRect (kidMargin.left, aState.y, kidSize.width, kidSize.height);
PlaceChild(aState, kidFrame, kidRect, aDesiredSize.maxElementSize, kidMaxElementSize);
if (bottomMargin < 0) {
aState.prevMaxNegBottomMargin = -bottomMargin;
} else {
aState.prevMaxPosBottomMargin = bottomMargin;
}
// XXX We're not correctly dealing with maxElementSize...
// Adjust the frames that follow
return AdjustSiblingsAfterReflow(aPresContext, aState, kidFrame,
kidRect.YMost() - oldKidRect.YMost());
}
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/**
* Reflow is a 2-step process.
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* In the first step, we lay out all of the captions and the inner table in NS_UNCONSTRAINEDSIZE space.
* This gives us absolute minimum and maximum widths.
* In the second step, we force all the captions and the table to the width of the widest component,
* given the table's width constraints.
* With the widths known, we reflow the captions and table.
* NOTE: for breaking across pages, this method has to account for table content that is not laid out
* linearly vis a vis the frames. That is, content hierarchy and the frame hierarchy do not match.
*/
NS_METHOD nsTableOuterFrame::Reflow(nsIPresContext* aPresContext,
nsReflowMetrics& aDesiredSize,
const nsReflowState& aReflowState,
nsReflowStatus& aStatus)
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{
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if (PR_TRUE==gsDebug)
printf("%p: nsTableOuterFrame::Reflow : maxSize=%d,%d\n",
this, aReflowState.maxSize.width, aReflowState.maxSize.height);
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#ifdef NS_DEBUG
// replace with a check that does not assume linear placement of children
// PreReflowCheck();
#endif
// Initialize out parameters
if (nsnull != aDesiredSize.maxElementSize) {
aDesiredSize.maxElementSize->width = 0;
aDesiredSize.maxElementSize->height = 0;
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}
aStatus = NS_FRAME_COMPLETE;
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// Initialize our local reflow state
OuterTableReflowState state(aPresContext, aReflowState);
if (eReflowReason_Incremental == aReflowState.reason) {
IncrementalReflow(aPresContext, state, aDesiredSize, aReflowState, aStatus);
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} else {
if (eReflowReason_Initial == aReflowState.reason) {
// Set up our kids. They're already present, on an overflow list,
// or there are none so we'll create them now
MoveOverflowToChildList();
if (nsnull==mFirstChild) {
CreateChildFrames(aPresContext);
}
// XXX Add a comment on why mInnerTableFrame would be nsnull at this point?
// You would think that the call to CreateChildFrames() would have created
// the inner table frame...
if (nsnull!=mPrevInFlow && nsnull==mInnerTableFrame)
{ // if I am a continuing frame, my inner table is my prev-in-flow's mInnerTableFrame's next-in-flow
CreateInnerTableFrame(aPresContext);
}
// lay out captions pass 1
aStatus = ResizeReflowCaptionsPass1(aPresContext, state, PR_TRUE);
}
// at this point, we must have at least one child frame, and we must have an inner table frame
NS_ASSERTION(nsnull!=mFirstChild, "no children");
NS_ASSERTION(nsnull!=mInnerTableFrame, "no mInnerTableFrame");
if (nsnull==mFirstChild || nsnull==mInnerTableFrame) {
//ERROR!
aStatus = NS_FRAME_COMPLETE;
return NS_OK;
}
// lay out inner table, if required
if (PR_FALSE==mInnerTableFrame->IsFirstPassValid())
{
// we treat the table as if we've never seen the layout data before
mInnerTableFrame->SetReflowPass(nsTableFrame::kPASS_FIRST);
nsReflowState innerTableReflowState(mInnerTableFrame, aReflowState, aReflowState.maxSize);
aStatus = mInnerTableFrame->ResizeReflowPass1(aPresContext, aDesiredSize,
innerTableReflowState, aStatus);
}
mInnerTableFrame->SetReflowPass(nsTableFrame::kPASS_SECOND);
// assign table width info only if the inner table frame is a first-in-flow
nsIFrame* prevInFlow;
mInnerTableFrame->GetPrevInFlow(prevInFlow);
if (nsnull==prevInFlow)
{
// assign column widths, and assign aMaxElementSize->width
mInnerTableFrame->BalanceColumnWidths(aPresContext, aReflowState,
aReflowState.maxSize,
aDesiredSize.maxElementSize);
// assign table width
mInnerTableFrame->SetTableWidth(aPresContext);
}
// inner table max is now the computed width and assigned height
nsSize innerTableSize(0,0);
mInnerTableFrame->GetSize(innerTableSize);
state.innerTableMaxSize.width = innerTableSize.width;
state.innerTableMaxSize.height = aReflowState.maxSize.height;
// Reflow the child frames
PRBool reflowMappedOK = PR_TRUE;
if (nsnull != mFirstChild) {
reflowMappedOK = ReflowMappedChildren(aPresContext, state, aDesiredSize.maxElementSize);
if (PR_FALSE == reflowMappedOK) {
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aStatus = NS_FRAME_NOT_COMPLETE;
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}
}
// Did we successfully relow our mapped children?
if (PR_TRUE == reflowMappedOK) {
// Any space left?
if (state.availSize.height <= 0) {
// No space left. Don't try to pull-up children or reflow unmapped
if (NextChildOffset() < mContent->ChildCount()) {
aStatus = NS_FRAME_NOT_COMPLETE;
}
}
else {
// this is where any other kind of frame would call PullUpChildren
// but that logic doesn't seem to work with tables because of the way
// captions are done. captions can come before or after the inner table,
// making compares between nextChildOffset and mContent->ChildCount unsuitable
/*
PRInt32 nextChildOffset = NextChildOffset();
if ( nextChildOffset < mContent->ChildCount()) {
// Try and pull-up some children from a next-in-flow
if (PullUpChildren(aPresContext, state, aDesiredSize.maxElementSize)) {
// If we still have unmapped children then create some new frames
NS_ABORT(); // huge error for tables!
} else {
// We were unable to pull-up all the existing frames from the next in flow
aStatus = NS_FRAME_NOT_COMPLETE;
}
}
*/
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}
}
}
if (NS_FRAME_IS_COMPLETE(aStatus)) {
// Don't forget to add in the bottom margin from our last child.
// Only add it in if there's room for it.
nscoord margin = state.prevMaxPosBottomMargin -
state.prevMaxNegBottomMargin;
if (state.availSize.height >= margin) {
state.y += margin;
}
}
// Return our desired rect
//NS_ASSERTION(0<state.y, "illegal height after reflow");
//NS_ASSERTION(0<state.innerTableMaxSize.width, "illegal width after reflow");
aDesiredSize.width = state.innerTableMaxSize.width;
/* if we're incomplete, take up all the remaining height so we don't waste time
* trying to lay out in a slot that we know isn't tall enough to fit our minimum.
* otherwise, we're as tall as our kids want us to be */
if (NS_FRAME_IS_NOT_COMPLETE(aStatus))
aDesiredSize.height = aReflowState.maxSize.height;
else
aDesiredSize.height = state.y;
if (gsDebug==PR_TRUE)
{
if (nsnull!=aDesiredSize.maxElementSize)
printf("%p: Outer frame Reflow complete, returning %s with aDesiredSize = %d,%d and aMaxElementSize=%d,%d\n",
this, NS_FRAME_IS_COMPLETE(aStatus)? "Complete" : "Not Complete",
aDesiredSize.width, aDesiredSize.height,
aDesiredSize.maxElementSize->width, aDesiredSize.maxElementSize->height);
else
printf("%p: Outer frame Reflow complete, returning %s with aDesiredSize = %d,%d and NSNULL aMaxElementSize\n",
this, NS_FRAME_IS_COMPLETE(aStatus)? "Complete" : "Not Complete",
aDesiredSize.width, aDesiredSize.height);
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}
#ifdef NS_DEBUG
// replace with a check that does not assume linear placement of children
// PostReflowCheck(status);
#endif
return NS_OK;
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}
// Collapse child's top margin with previous bottom margin
nscoord nsTableOuterFrame::GetTopMarginFor(nsIPresContext* aCX,
OuterTableReflowState& aState,
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const nsMargin& aKidMargin)
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{
nscoord margin;
nscoord maxNegTopMargin = 0;
nscoord maxPosTopMargin = 0;
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if ((margin = aKidMargin.top) < 0) {
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maxNegTopMargin = -margin;
} else {
maxPosTopMargin = margin;
}
nscoord maxPos = PR_MAX(aState.prevMaxPosBottomMargin, maxPosTopMargin);
nscoord maxNeg = PR_MAX(aState.prevMaxNegBottomMargin, maxNegTopMargin);
margin = maxPos - maxNeg;
return margin;
}
// Position and size aKidFrame and update our reflow state. The origin of
// aKidRect is relative to the upper-left origin of our frame, and includes
// any left/top margin.
void nsTableOuterFrame::PlaceChild( OuterTableReflowState& aState,
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nsIFrame* aKidFrame,
const nsRect& aKidRect,
nsSize* aMaxElementSize,
nsSize& aKidMaxElementSize)
{
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if (PR_TRUE==gsDebug)
printf ("outer table place child: %p with aKidRect %d %d %d %d\n",
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aKidFrame, aKidRect.x, aKidRect.y,
aKidRect.width, aKidRect.height);
// Place and size the child
aKidFrame->SetRect(aKidRect);
// Adjust the running y-offset
aState.y += aKidRect.height;
// If our height is constrained then update the available height
if (PR_FALSE == aState.unconstrainedHeight) {
aState.availSize.height -= aKidRect.height;
}
/* Update the maximum element size, which is the sum of:
* the maxElementSize of our first row
* plus the maxElementSize of the top caption if we include it
* plus the maxElementSize of the bottom caption if we include it
*/
if (PR_TRUE==aState.processingCaption || PR_TRUE==aState.firstRowGroup)
{
if (PR_FALSE==aState.processingCaption)
aState.firstRowGroup = PR_FALSE;
if (nsnull != aMaxElementSize) {
aMaxElementSize->width = aKidMaxElementSize.width;
aMaxElementSize->height = aKidMaxElementSize.height;
}
}
}
/**
* Reflow the frames we've already created
*
* @param aPresContext presentation context to use
* @param aState current inline state
* @return true if we successfully reflowed all the mapped children and false
* otherwise, e.g. we pushed children to the next in flow
*/
PRBool nsTableOuterFrame::ReflowMappedChildren( nsIPresContext* aPresContext,
OuterTableReflowState& aState,
nsSize* aMaxElementSize)
{
#ifdef NS_DEBUG
VerifyLastIsComplete();
#endif
#ifdef NOISY
ListTag(stdout);
printf(": reflow mapped (childCount=%d) [%d,%d,%c]\n",
mChildCount,
mFirstContentOffset, mLastContentOffset,
(mLastContentIsComplete ? 'T' : 'F'));
#ifdef NOISY_FLOW
{
nsTableOuterFrame* flow = (nsTableOuterFrame*) mNextInFlow;
while (flow != 0) {
printf(" %p: [%d,%d,%c]\n",
flow, flow->mFirstContentOffset, flow->mLastContentOffset,
(flow->mLastContentIsComplete ? 'T' : 'F'));
flow = (nsTableOuterFrame*) flow->mNextInFlow;
}
}
#endif
#endif
NS_PRECONDITION(nsnull != mFirstChild, "no children");
PRInt32 childCount = 0;
nsIFrame* prevKidFrame = nsnull;
// Remember our original mLastContentIsComplete so that if we end up
// having to push children, we have the correct value to hand to
// PushChildren.
PRBool originalLastContentIsComplete = mLastContentIsComplete;
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nsSize kidMaxElementSize(0,0);
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nsSize* pKidMaxElementSize = (nsnull != aMaxElementSize) ? &kidMaxElementSize : nsnull;
PRBool result = PR_TRUE;
aState.availSize.width = aState.innerTableMaxSize.width;
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for (nsIFrame* kidFrame = mFirstChild; nsnull != kidFrame; ) {
nsReflowMetrics kidSize(pKidMaxElementSize);
kidSize.width=kidSize.height=kidSize.ascent=kidSize.descent=0;
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nsReflowStatus status;
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SetReflowState(aState, kidFrame);
if (PR_TRUE==gsDebug) printf ("ReflowMappedChildren: %p with state = %s\n",
kidFrame, aState.processingCaption?"caption":"inner");
// Get top margin for this kid
const nsStyleSpacing* kidSpacing;
kidFrame->GetStyleData(eStyleStruct_Spacing, (nsStyleStruct *&)kidSpacing);
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nsMargin kidMargin;
kidSpacing->CalcMarginFor(kidFrame, kidMargin);
nscoord topMargin = GetTopMarginFor(aPresContext, aState, kidMargin);
nscoord bottomMargin = kidMargin.bottom;
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// Figure out the amount of available size for the child (subtract
// off the top margin we are going to apply to it)
if (PR_FALSE == aState.unconstrainedHeight) {
aState.availSize.height -= topMargin;
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}
// Subtract off for left and right margin
if (PR_FALSE == aState.unconstrainedWidth) {
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aState.availSize.width -= kidMargin.left + kidMargin.right;
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}
// Only skip the reflow if this is not our first child and we are
// out of space.
if ((kidFrame == mFirstChild) || (aState.availSize.height > 0)) {
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// Reflow the child into the available space
kidFrame->WillReflow(*aPresContext);
kidFrame->MoveTo(kidMargin.left, aState.y + topMargin);
nsReflowState kidReflowState(kidFrame, aState.reflowState, kidFrame == mInnerTableFrame ?
aState.innerTableMaxSize : aState.availSize,
eReflowReason_Resize);
status = ReflowChild(kidFrame, aPresContext, kidSize,
kidReflowState, pKidMaxElementSize, aState);
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}
// Did the child fit?
if ((kidSize.height > aState.availSize.height) && (kidFrame != mFirstChild)) {
// The child is too tall to fit in the available space, and it's
// not our first child
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// Since we are giving the next-in-flow our last child, we
// give it our original mLastContentIsComplete too (in case we
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// are pushing into an empty next-in-flow)
PushChildren(kidFrame, prevKidFrame, originalLastContentIsComplete);
SetLastContentOffset(prevKidFrame);
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result = PR_FALSE;
break;
}
// Place the child after taking into account it's margin
aState.y += topMargin;
nsRect kidRect (kidMargin.left, aState.y, kidSize.width, kidSize.height);
PlaceChild(aState, kidFrame, kidRect, aMaxElementSize, kidMaxElementSize);
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if (bottomMargin < 0) {
aState.prevMaxNegBottomMargin = -bottomMargin;
} else {
aState.prevMaxPosBottomMargin = bottomMargin;
}
childCount++;
// Remember where we just were in case we end up pushing children
prevKidFrame = kidFrame;
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// Update mLastContentIsComplete now that this kid fits
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mLastContentIsComplete = NS_FRAME_IS_COMPLETE(status);
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if (NS_FRAME_IS_NOT_COMPLETE(status)) {
// No, the child isn't complete
nsIFrame* kidNextInFlow;
kidFrame->GetNextInFlow(kidNextInFlow);
PRBool lastContentIsComplete = mLastContentIsComplete;
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if (nsnull == kidNextInFlow) {
// The child doesn't have a next-in-flow so create a continuing
// frame. This hooks the child into the flow
nsIFrame* continuingFrame;
nsIStyleContext* kidSC;
kidFrame->GetStyleContext(aPresContext, kidSC);
kidFrame->CreateContinuingFrame(aPresContext, this, kidSC,
continuingFrame);
NS_RELEASE(kidSC);
NS_ASSERTION(nsnull != continuingFrame, "frame creation failed");
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// Add the continuing frame to the sibling list
nsIFrame* nextSib;
kidFrame->GetNextSibling(nextSib);
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continuingFrame->SetNextSibling(nextSib);
kidFrame->SetNextSibling(continuingFrame);
if (nsnull == nextSib) {
// Assume that the continuation frame we just created is
// complete, for now. It will get reflowed by our
// next-in-flow (we are going to push it now)
lastContentIsComplete = PR_TRUE;
}
}
// We've used up all of our available space so push the remaining
// children to the next-in-flow
nsIFrame* nextSibling;
kidFrame->GetNextSibling(nextSibling);
if (nsnull != nextSibling) {
PushChildren(nextSibling, kidFrame, lastContentIsComplete);
/* debug */
/*
printf ("having just pushed children, here is the frame hierarchy.\n");
nsIFrame *p;
GetGeometricParent(p);
nsIFrame *root;
while (nsnull!=p)
{
root = p;
p->GetGeometricParent(p);
}
root->List();
fflush(stdout);
*/
/* end debug */
SetLastContentOffset(prevKidFrame);
}
result = PR_FALSE;
break;
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}
// Get the next child
kidFrame->GetNextSibling(kidFrame);
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// XXX talk with troy about checking for available space here
}
// Update the child count
mChildCount = childCount;
NS_POSTCONDITION(LengthOf(mFirstChild) == mChildCount, "bad child count");
// Set the last content offset based on the last child we mapped.
NS_ASSERTION(IsLastChild(prevKidFrame), "unexpected last child");
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SetLastContentOffset(prevKidFrame);
#ifdef NS_DEBUG
VerifyLastIsComplete();
#endif
#ifdef NOISY
ListTag(stdout);
printf(": reflow mapped %sok (childCount=%d) [%d,%d,%c]\n",
(result ? "" : "NOT "),
mChildCount,
mFirstContentOffset, mLastContentOffset,
(mLastContentIsComplete ? 'T' : 'F'));
#ifdef NOISY_FLOW
{
nsTableOuterFrame* flow = (nsTableOuterFrame*) mNextInFlow;
while (flow != 0) {
printf(" %p: [%d,%d,%c]\n",
flow, flow->mFirstContentOffset, flow->mLastContentOffset,
(flow->mLastContentIsComplete ? 'T' : 'F'));
flow = (nsTableOuterFrame*) flow->mNextInFlow;
}
}
#endif
#endif
return result;
}
/**
* Try and pull-up frames from our next-in-flow
*
* @param aPresContext presentation context to use
* @param aState current inline state
* @return true if we successfully pulled-up all the children and false
* otherwise, e.g. child didn't fit
*/
PRBool nsTableOuterFrame::PullUpChildren( nsIPresContext* aPresContext,
OuterTableReflowState& aState,
nsSize* aMaxElementSize)
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{
#ifdef NS_DEBUG
VerifyLastIsComplete();
#endif
#ifdef NOISY
ListTag(stdout);
printf(": pullup (childCount=%d) [%d,%d,%c]\n",
mChildCount,
mFirstContentOffset, mLastContentOffset,
(mLastContentIsComplete ? 'T' : 'F'));
#ifdef NOISY_FLOW
{
nsTableOuterFrame* flow = (nsTableOuterFrame*) mNextInFlow;
while (flow != 0) {
printf(" %p: [%d,%d,%c]\n",
flow, flow->mFirstContentOffset, flow->mLastContentOffset,
(flow->mLastContentIsComplete ? 'T' : 'F'));
flow = (nsTableOuterFrame*) flow->mNextInFlow;
}
}
#endif
#endif
nsTableOuterFrame* nextInFlow = (nsTableOuterFrame*)mNextInFlow;
nsSize kidMaxElementSize(0,0);
nsSize* pKidMaxElementSize = (nsnull != aMaxElementSize) ? &kidMaxElementSize : nsnull;
#ifdef NS_DEBUG
PRInt32 kidIndex = NextChildOffset();
#endif
nsIFrame* prevKidFrame;
LastChild(prevKidFrame);
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// This will hold the prevKidFrame's mLastContentIsComplete
// status. If we have to push the frame that follows prevKidFrame
// then this will become our mLastContentIsComplete state. Since
// prevKidFrame is initially our last frame, it's completion status
// is our mLastContentIsComplete value.
PRBool prevLastContentIsComplete = mLastContentIsComplete;
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PRBool result = PR_TRUE;
while (nsnull != nextInFlow) {
nsReflowMetrics kidSize(pKidMaxElementSize);
kidSize.width=kidSize.height=kidSize.ascent=kidSize.descent=0;
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nsReflowStatus status;
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// Get the next child
nsIFrame* kidFrame = nextInFlow->mFirstChild;
// Any more child frames?
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if (nsnull == kidFrame) {
// No. Any frames on its overflow list?
if (nsnull != nextInFlow->mOverflowList) {
// Move the overflow list to become the child list
//NS_ABORT();
nextInFlow->AppendChildren(nextInFlow->mOverflowList);
nextInFlow->mOverflowList = nsnull;
kidFrame = nextInFlow->mFirstChild;
} else {
// We've pulled up all the children, so move to the next-in-flow.
nextInFlow->GetNextInFlow((nsIFrame*&)nextInFlow);
continue;
}
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}
// See if the child fits in the available space. If it fits or
// it's splittable then reflow it. The reason we can't just move
// it is that we still need ascent/descent information
nsSize kidFrameSize(0,0);
nsSplittableType kidIsSplittable;
kidFrame->GetSize(kidFrameSize);
kidFrame->IsSplittable(kidIsSplittable);
if ((kidFrameSize.width > aState.availSize.height) &&
NS_FRAME_IS_NOT_SPLITTABLE(kidIsSplittable)) {
result = PR_FALSE;
mLastContentIsComplete = prevLastContentIsComplete;
break;
}
kidFrame->WillReflow(*aPresContext);
nsReflowState kidReflowState(kidFrame, aState.reflowState, kidFrame == mInnerTableFrame ?
aState.innerTableMaxSize : aState.availSize);
status = ReflowChild(kidFrame, aPresContext, kidSize, kidReflowState,
pKidMaxElementSize, aState);
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// Did the child fit?
if ((kidSize.height > aState.availSize.height) && (nsnull != mFirstChild)) {
// The child is too wide to fit in the available space, and it's
// not our first child
result = PR_FALSE;
mLastContentIsComplete = prevLastContentIsComplete;
break;
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}
// Place the child after taking into account it's margin
// aState.y += topMargin;
nsRect kidRect (0, 0, kidSize.width, kidSize.height);
// kidRect.x += kidMol->margin.left;
kidRect.y += aState.y;
PlaceChild(aState, kidFrame, kidRect, aMaxElementSize, *pKidMaxElementSize);
// Remove the frame from its current parent
kidFrame->GetNextSibling(nextInFlow->mFirstChild);
nextInFlow->mChildCount--;
// Update the next-in-flows first content offset
if (nsnull != nextInFlow->mFirstChild) {
nextInFlow->SetFirstContentOffset(nextInFlow->mFirstChild);
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}
// Link the frame into our list of children
kidFrame->SetGeometricParent(this);
nsIFrame* kidContentParent;
kidFrame->GetContentParent(kidContentParent);
if (nextInFlow == kidContentParent) {
kidFrame->SetContentParent(this);
}
if (nsnull == prevKidFrame) {
mFirstChild = kidFrame;
SetFirstContentOffset(kidFrame);
} else {
prevKidFrame->SetNextSibling(kidFrame);
}
kidFrame->SetNextSibling(nsnull);
mChildCount++;
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// Remember where we just were in case we end up pushing children
prevKidFrame = kidFrame;
prevLastContentIsComplete = mLastContentIsComplete;
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// Is the child we just pulled up complete?
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mLastContentIsComplete = NS_FRAME_IS_COMPLETE(status);
if (NS_FRAME_IS_NOT_COMPLETE(status)) {
// No the child isn't complete
nsIFrame* kidNextInFlow;
kidFrame->GetNextInFlow(kidNextInFlow);
if (nsnull == kidNextInFlow) {
// The child doesn't have a next-in-flow so create a
// continuing frame. The creation appends it to the flow and
// prepares it for reflow.
nsIFrame* continuingFrame;
nsIStyleContext* kidSC;
kidFrame->GetStyleContext(aPresContext, kidSC);
kidFrame->CreateContinuingFrame(aPresContext, this, kidSC,
continuingFrame);
NS_ASSERTION(nsnull != continuingFrame, "frame creation failed");
// Add the continuing frame to our sibling list and then push
// it to the next-in-flow. This ensures the next-in-flow's
// content offsets and child count are set properly. Note that
// we can safely assume that the continuation is complete so
// we pass PR_TRUE into PushChidren in case our next-in-flow
// was just drained and now needs to know it's
// mLastContentIsComplete state.
kidFrame->SetNextSibling(continuingFrame);
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PushChildren(continuingFrame, kidFrame, PR_TRUE);
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// After we push the continuation frame we don't need to fuss
// with mLastContentIsComplete beause the continuation frame
// is no longer on *our* list.
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}
// If the child isn't complete then it means that we've used up
// all of our available space.
result = PR_FALSE;
break;
}
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}
// Update our last content offset
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if (nsnull != prevKidFrame) {
NS_ASSERTION(IsLastChild(prevKidFrame), "bad last child");
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SetLastContentOffset(prevKidFrame);
}
// We need to make sure the first content offset is correct for any empty
// next-in-flow frames (frames where we pulled up all the child frames)
nextInFlow = (nsTableOuterFrame*)mNextInFlow;
if ((nsnull != nextInFlow) && (nsnull == nextInFlow->mFirstChild)) {
// We have at least one empty frame. Did we succesfully pull up all the
// child frames?
if (PR_FALSE == result) {
// No, so we need to adjust the first content offset of all the empty
// frames
AdjustOffsetOfEmptyNextInFlows();
#ifdef NS_DEBUG
} else {
// Yes, we successfully pulled up all the child frames which means all
// the next-in-flows must be empty. Do a sanity check
while (nsnull != nextInFlow) {
NS_ASSERTION(nsnull == nextInFlow->mFirstChild, "non-empty next-in-flow");
nextInFlow->GetNextInFlow((nsIFrame*&)nextInFlow);
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}
#endif
}
}
#ifdef NS_DEBUG
PRInt32 len = LengthOf(mFirstChild);
NS_ASSERTION(len == mChildCount, "bad child count");
VerifyLastIsComplete();
#endif
#ifdef NOISY
ListTag(stdout);
printf(": pullup %sok (childCount=%d) [%d,%d,%c]\n",
(result ? "" : "NOT "),
mChildCount,
mFirstContentOffset, mLastContentOffset,
(mLastContentIsComplete ? 'T' : 'F'));
#ifdef NOISY_FLOW
{
nsTableOuterFrame* flow = (nsTableOuterFrame*) mNextInFlow;
while (flow != 0) {
printf(" %p: [%d,%d,%c]\n",
flow, flow->mFirstContentOffset, flow->mLastContentOffset,
(flow->mLastContentIsComplete ? 'T' : 'F'));
flow = (nsTableOuterFrame*) flow->mNextInFlow;
}
}
#endif
#endif
return result;
}
/** set the OuterTableReflowState based on the child frame we are currently processing.
* must be called before ReflowChild, at a minimum.
*/
void nsTableOuterFrame::SetReflowState(OuterTableReflowState& aState, nsIFrame* aKidFrame)
{
nsIContentPtr kid;
aKidFrame->GetContent(kid.AssignRef()); // kid: REFCNT++
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nsITableContent *tableContentInterface = nsnull;
kid->QueryInterface(kITableContentIID, (void**)&tableContentInterface);// tableContentInterface: REFCNT++
if (nsnull!=tableContentInterface)
{
aState.processingCaption = PR_TRUE;
NS_RELEASE(tableContentInterface); // tableContentInterface: REFCNT--
}
else
aState.processingCaption = PR_FALSE;
}
/**
* Reflow a child frame and return the status of the reflow. If the
* child is complete and it has next-in-flows (it was a splittable child)
* then delete the next-in-flows.
*/
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nsReflowStatus
nsTableOuterFrame::ReflowChild( nsIFrame* aKidFrame,
nsIPresContext* aPresContext,
nsReflowMetrics& aDesiredSize,
const nsReflowState& aKidReflowState,
nsSize* aMaxElementSize,
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OuterTableReflowState& aState)
{
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nsReflowStatus status;
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/* call the appropriate reflow method based on the type and position of the child */
if (PR_TRUE==aState.processingCaption)
{ // it's a caption, find out if it's top or bottom
// Resolve style
#if 0
const nsStyleText* captionStyle;
aKidFrame->GetStyleData(eStyleStruct_Text, ( nsStyleStruct *&)captionStyle);
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NS_ASSERTION(nsnull != captionStyle, "null style molecule for caption");
if ((eStyleUnit_Enumerated == captionStyle->mVerticalAlign.GetUnit()) &&
(NS_STYLE_VERTICAL_ALIGN_BOTTOM==captionStyle->mVerticalAlign.GetIntValue()))
{
if (PR_TRUE==gsDebug) printf("reflowChild called with a bottom caption\n");
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status = ResizeReflowBottomCaptionsPass2(aPresContext, aDesiredSize,
aMaxSize, aMaxElementSize,
aState.y, aState);
}
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else
{
if (PR_TRUE==gsDebug) printf("reflowChild called with a top caption\n");
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status = ResizeReflowTopCaptionsPass2(aPresContext, aDesiredSize,
aMaxSize, aMaxElementSize, aState);
}
#else
status = nsContainerFrame::ReflowChild(aKidFrame, aPresContext, aDesiredSize,
aKidReflowState);
#endif
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}
else
{
if (PR_TRUE==gsDebug) printf("reflowChild called with a table body\n");
if (eReflowReason_Incremental == aKidReflowState.reason) {
aKidFrame->Reflow(aPresContext, aDesiredSize, aKidReflowState, status);
} else {
status = ((nsTableFrame*)aKidFrame)->ResizeReflowPass2(aPresContext, aDesiredSize, aKidReflowState,
mMinCaptionWidth, mMaxCaptionWidth);
}
}
if (PR_TRUE==gsDebug)
{
}
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if (NS_FRAME_IS_COMPLETE(status)) {
nsIFrame* kidNextInFlow;
aKidFrame->GetNextInFlow(kidNextInFlow);
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if (nsnull != kidNextInFlow) {
// Remove all of the childs next-in-flows. Make sure that we ask
// the right parent to do the removal (it's possible that the
// parent is not this because we are executing pullup code)
nsTableOuterFrame* parent;
aKidFrame->GetGeometricParent((nsIFrame*&)parent);
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parent->DeleteChildsNextInFlow(aKidFrame);
}
}
return status;
}
void nsTableOuterFrame::CreateChildFrames(nsIPresContext* aPresContext)
{
nsIFrame *prevKidFrame = nsnull;
nsresult frameCreated = nsTableFrame::NewFrame((nsIFrame **)(&mInnerTableFrame), mContent, this);
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if (NS_OK!=frameCreated)
return; // SEC: an error!!!!
// Resolve style
nsIStyleContextPtr kidStyleContext =
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aPresContext->ResolveStyleContextFor(mContent, this);
NS_ASSERTION(kidStyleContext.IsNotNull(), "bad style context for kid.");
mInnerTableFrame->SetStyleContext(aPresContext,kidStyleContext);
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mChildCount++;
// Link child frame into the list of children
mFirstChild = mInnerTableFrame;
prevKidFrame = mInnerTableFrame;
// now create the caption frames, prepending top captions and
// appending bottom captions
mCaptionFrames = new nsVoidArray();
// create caption frames as needed
nsIFrame *lastTopCaption = nsnull;
for (PRInt32 kidIndex=0; /* nada */ ;kidIndex++)
{
nsIContentPtr caption = mContent->ChildAt(kidIndex);
if (PR_TRUE==caption.IsNull()) {
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break;
}
// Resolve style
nsIStyleContextPtr captionSC =
aPresContext->ResolveStyleContextFor(caption, this);
NS_ASSERTION(captionSC.IsNotNull(), "bad style context for caption.");
nsStyleDisplay *childDisplay = (nsStyleDisplay*)captionSC->GetStyleData(eStyleStruct_Display);
if (NS_STYLE_DISPLAY_TABLE_CAPTION == childDisplay->mDisplay)
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{
const nsStyleText* captionTextStyle =
(const nsStyleText*)captionSC->GetStyleData(eStyleStruct_Text);
// create the frame
nsIFrame *captionFrame=nsnull;
frameCreated = ((nsIHTMLContent*)(nsIContent*)caption)->CreateFrame(aPresContext,
this, captionSC, captionFrame);
if (NS_OK!=frameCreated)
return; // SEC: an error!!!!
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mChildCount++;
// Link child frame into the list of children
if ((eStyleUnit_Enumerated == captionTextStyle->mVerticalAlign.GetUnit()) &&
(NS_STYLE_VERTICAL_ALIGN_BOTTOM==captionTextStyle->mVerticalAlign.GetIntValue()))
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{ // bottom captions get added to the end of the outer frame child list
prevKidFrame->SetNextSibling(captionFrame);
prevKidFrame = captionFrame;
// bottom captions get remembered in an instance variable for easy access later
if (nsnull==mBottomCaptions)
{
mBottomCaptions = new nsVoidArray();
}
mBottomCaptions->AppendElement(captionFrame);
}
else
{ // top captions get prepended to the outer frame child list
if (nsnull == lastTopCaption)
{ // our first top caption, therefore our first child
mFirstChild = captionFrame;
mFirstChild->SetNextSibling(mInnerTableFrame);
}
else
{ // just another grub in the brood of top captions
nsIFrame* nextSibling;
lastTopCaption->GetNextSibling(nextSibling);
captionFrame->SetNextSibling(nextSibling);
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lastTopCaption->SetNextSibling(captionFrame);
lastTopCaption = captionFrame;
}
lastTopCaption = captionFrame;
}
mCaptionFrames->AppendElement(captionFrame);
}
else
{ // otherwise I know there are no more captions
// I'm assuming the frames were created in the correct order
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break;
}
}
}
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nsReflowStatus
nsTableOuterFrame::ResizeReflowCaptionsPass1(nsIPresContext* aPresContext,
OuterTableReflowState& aState,
PRBool aIsInitialReflow)
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{
if (nsnull!=mCaptionFrames)
{
PRInt32 numCaptions = mCaptionFrames->Count();
nsReflowReason reflowReason = aIsInitialReflow ? eReflowReason_Initial :
eReflowReason_Resize;
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for (PRInt32 captionIndex = 0; captionIndex < numCaptions; captionIndex++)
{
nsSize maxElementSize(0,0);
nsSize maxSize(NS_UNCONSTRAINEDSIZE, NS_UNCONSTRAINEDSIZE);
nsReflowMetrics kidSize(&maxElementSize);
kidSize.width=kidSize.height=kidSize.ascent=kidSize.descent=0;
nsIFrame *captionFrame = (nsIFrame*)mCaptionFrames->ElementAt(captionIndex);
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nsReflowStatus status;
nsReflowState reflowState(captionFrame, aState.reflowState, maxSize,
reflowReason);
captionFrame->WillReflow(*aPresContext);
captionFrame->Reflow(aPresContext, kidSize, reflowState, status);
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if (mMinCaptionWidth<maxElementSize.width)
mMinCaptionWidth = maxElementSize.width;
if (mMaxCaptionWidth<kidSize.width)
mMaxCaptionWidth = kidSize.width;
// captionFrame->VerticallyAlignChild(aPresContext);
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}
}
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return NS_FRAME_COMPLETE;
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}
#if 0
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nsReflowStatus
nsTableOuterFrame::ResizeReflowTopCaptionsPass2(nsIPresContext* aPresContext,
nsReflowMetrics& aDesiredSize,
const nsSize& aMaxSize,
nsSize* aMaxElementSize,
OuterTableReflowState& aState)
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{
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nsReflowStatus result = NS_FRAME_COMPLETE;
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nscoord topCaptionY = 0;
if (nsnull!=mCaptionFrames)
{
PRInt32 numCaptions = mCaptionFrames->Count();
for (PRInt32 captionIndex = 0; captionIndex < numCaptions; captionIndex++)
{
// get the caption
nsIFrame* captionFrame = (nsIFrame*)mCaptionFrames->ElementAt(captionIndex);
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// Resolve style
const nsStyleText* captionTextStyle;
captionFrame->GetStyleData(eStyleStruct_Text, (nsStyleStruct *&)captionTextStyle);
NS_ASSERTION(nsnull != captionTextStyle, "null style molecule for caption");
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if ((eStyleUnit_Enumerated == captionTextStyle->mVerticalAlign.GetUnit()) &&
(NS_STYLE_VERTICAL_ALIGN_BOTTOM==captionTextStyle->mVerticalAlign.GetIntValue()))
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{
}
else
{ // top-align captions, the default
// reflow the caption, skipping top captions after the first that doesn't fit
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if (NS_FRAME_IS_COMPLETE(result))
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{
nsReflowMetrics desiredSize(nsnull);
desiredSize.width=desiredSize.height=desiredSize.ascent=desiredSize.descent=0;
nsReflowState reflowState(captionFrame, aState.reflowState, aMaxSize, eReflowReason_Resize);
captionFrame->WillReflow(*aPresContext);
result = nsContainerFrame::ReflowChild(captionFrame, aPresContext, desiredSize, reflowState);
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// place the caption
captionFrame->SetRect(nsRect(0, topCaptionY, desiredSize.width, desiredSize.height));
if (NS_UNCONSTRAINEDSIZE!=desiredSize.height)
topCaptionY += desiredSize.height;
else
topCaptionY = NS_UNCONSTRAINEDSIZE;
mInnerTableFrame->MoveTo(0, topCaptionY);
PRInt32 captionIndexInParent;
captionFrame->GetContentIndex(captionIndexInParent);
if (0==captionIndexInParent)
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{
SetFirstContentOffset(captionFrame);
if (gsDebug) printf("OUTER: set first content offset to %d\n", GetFirstContentOffset()); //@@@
}
}
// else continue on, so we can build the mBottomCaptions list
}
}
}
aDesiredSize.width = aMaxSize.width;
aDesiredSize.height = topCaptionY;
if (nsnull!=aMaxElementSize)
{ // SEC: this isn't right
aMaxElementSize->width = aMaxSize.width;
aMaxElementSize->height = topCaptionY;
}
return result;
}
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nsReflowStatus
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nsTableOuterFrame::ResizeReflowBottomCaptionsPass2(nsIPresContext* aPresContext,
nsReflowMetrics& aDesiredSize,
const nsSize& aMaxSize,
nsSize* aMaxElementSize,
nscoord aYOffset,
OuterTableReflowState& aState)
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{
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nsReflowStatus result = NS_FRAME_COMPLETE;
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nscoord bottomCaptionY = aYOffset;
// for now, assume all captions are stacked vertically
if (nsnull!=mBottomCaptions)
{
PRInt32 numCaptions = mBottomCaptions->Count();
for (PRInt32 captionIndex = 0; captionIndex < numCaptions; captionIndex++)
{
// get the caption
nsIFrame* captionFrame = (nsIFrame*)mBottomCaptions->ElementAt(captionIndex);
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// Resolve style
/*
nsIStyleContextPtr captionSC = captionFrame->GetStyleContext(aPresContext);
NS_ASSERTION(nsnull != captionSC, "null style context for caption");
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nsStyleMolecule* captionStyle =
(nsStyleMolecule*)captionSC->GetData(eStyleStruct_Molecule);
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NS_ASSERTION(nsnull != captionStyle, "null style molecule for caption");
*/
// reflow the caption
nsReflowMetrics desiredSize(nsnull);
desiredSize.width=desiredSize.height=desiredSize.ascent=desiredSize.descent=0;
nsReflowState reflowState(captionFrame, aState.reflowState, aMaxSize, eReflowReason_Resize);
captionFrame->WillReflow(*aPresContext);
result = nsContainerFrame::ReflowChild(captionFrame, aPresContext, desiredSize, reflowState);
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// place the caption
nsRect rect;
captionFrame->GetRect(rect);
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rect.y = bottomCaptionY;
rect.width=desiredSize.width;
rect.height=desiredSize.height;
captionFrame->SetRect(rect);
if (NS_UNCONSTRAINEDSIZE!=desiredSize.height)
bottomCaptionY += desiredSize.height;
else
bottomCaptionY = NS_UNCONSTRAINEDSIZE;
}
}
aDesiredSize.width = aMaxSize.width;
aDesiredSize.height = bottomCaptionY-aYOffset;
if (nsnull!=aMaxElementSize)
{ // SEC: not right
aMaxElementSize->width = aMaxSize.width;
aMaxElementSize->height = bottomCaptionY-aYOffset;
}
return result;
}
#endif
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/**
* Sets the last content offset based on the last child frame. If the last
* child is a pseudo frame then it sets mLastContentIsComplete to be the same
* as the last child's mLastContentIsComplete
*/
/*
void nsTableOuterFrame::SetLastContentOffset(const nsIFrame* aLastChild)
{
NS_PRECONDITION(nsnull != aLastChild, "bad argument");
NS_PRECONDITION(aLastChild->GetGeometricParent() == this, "bad geometric parent");
if (ChildIsPseudoFrame(aLastChild)) {
nsContainerFrame* pseudoFrame = (nsContainerFrame*)aLastChild;
mLastContentOffset = pseudoFrame->GetLastContentOffset();
mLastContentIsComplete = pseudoFrame->GetLastContentIsComplete();
} else {
mLastContentOffset = aLastChild->GetIndexInParent();
}
#ifdef NS_DEBUG
if (mLastContentOffset < mFirstContentOffset) {
nsIFrame* top = this;
while (top->GetGeometricParent() != nsnull) {
top = top->GetGeometricParent();
}
top->List();
}
#endif
// it is this next line that forces us to re-implement this method here
//NS_ASSERTION(mLastContentOffset >= mFirstContentOffset, "unexpected content mapping");
}
*/
NS_METHOD
nsTableOuterFrame::CreateContinuingFrame(nsIPresContext* aPresContext,
nsIFrame* aParent,
nsIStyleContext* aStyleContext,
nsIFrame*& aContinuingFrame)
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{
nsTableOuterFrame* cf = new nsTableOuterFrame(mContent, aParent);
if (nsnull == cf) {
return NS_ERROR_OUT_OF_MEMORY;
}
PrepareContinuingFrame(aPresContext, aParent, aStyleContext, cf);
if (PR_TRUE==gsDebug)
printf("nsTableOuterFrame::CCF parent = %p, this=%p, cf=%p\n", aParent, this, cf);
aContinuingFrame = cf;
return NS_OK;
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}
void
nsTableOuterFrame::PrepareContinuingFrame(nsIPresContext* aPresContext,
nsIFrame* aParent,
nsIStyleContext* aStyleContext,
nsTableOuterFrame* aContFrame)
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{
// Append the continuing frame to the flow
aContFrame->AppendToFlow(this);
// Initialize it's content offsets. Note that we assume for now that
// the continuingFrame will map the remainder of the content and
// that therefore mLastContentIsComplete will be true.
PRInt32 nextOffset;
if (mChildCount > 0) {
nextOffset = mLastContentOffset;
if (mLastContentIsComplete) {
nextOffset++;
}
} else {
nextOffset = mFirstContentOffset;
}
aContFrame->SetFirstContentOffset(nextOffset);
aContFrame->SetLastContentOffset(nextOffset);
aContFrame->SetLastContentIsComplete(PR_TRUE);
aContFrame->SetStyleContext(aPresContext, aStyleContext);
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}
NS_METHOD nsTableOuterFrame::VerifyTree() const
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{
#ifdef NS_DEBUG
#endif
return NS_OK;
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}
/**
* Remove and delete aChild's next-in-flow(s). Updates the sibling and flow
* pointers.
*
* Updates the child count and content offsets of all containers that are
* affected
*
* Overloaded here because nsContainerFrame makes assumptions about pseudo-frames
* that are not true for tables.
*
* @param aChild child this child's next-in-flow
* @return PR_TRUE if successful and PR_FALSE otherwise
*/
PRBool nsTableOuterFrame::DeleteChildsNextInFlow(nsIFrame* aChild)
{
NS_PRECONDITION(IsChild(aChild), "bad geometric parent");
nsIFrame* nextInFlow;
aChild->GetNextInFlow(nextInFlow);
NS_PRECONDITION(nsnull != nextInFlow, "null next-in-flow");
nsTableOuterFrame* parent;
nextInFlow->GetGeometricParent((nsIFrame*&)parent);
// If the next-in-flow has a next-in-flow then delete it too (and
// delete it first).
nsIFrame* nextNextInFlow;
nextInFlow->GetNextInFlow(nextNextInFlow);
if (nsnull != nextNextInFlow) {
parent->DeleteChildsNextInFlow(nextInFlow);
}
#ifdef NS_DEBUG
PRInt32 childCount;
nsIFrame* firstChild;
nextInFlow->ChildCount(childCount);
nextInFlow->FirstChild(firstChild);
NS_ASSERTION(childCount == 0, "deleting !empty next-in-flow");
NS_ASSERTION((0 == childCount) && (nsnull == firstChild), "deleting !empty next-in-flow");
#endif
// Disconnect the next-in-flow from the flow list
nextInFlow->BreakFromPrevFlow();
// Take the next-in-flow out of the parent's child list
if (parent->mFirstChild == nextInFlow) {
nextInFlow->GetNextSibling(parent->mFirstChild);
if (nsnull != parent->mFirstChild) {
parent->SetFirstContentOffset(parent->mFirstChild);
if (parent->IsPseudoFrame()) {
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// Tell the parent's parent to update its content offsets
nsContainerFrame* pp = (nsContainerFrame*) parent->mGeometricParent;
pp->PropagateContentOffsets(parent, parent->mFirstContentOffset,
parent->mLastContentOffset,
parent->mLastContentIsComplete);
}
}
// When a parent loses it's last child and that last child is a
// pseudo-frame then the parent's content offsets are now wrong.
// However, we know that the parent will eventually be reflowed
// in one of two ways: it will either get a chance to pullup
// children or it will be deleted because it's prev-in-flow
// (e.g. this) is complete. In either case, the content offsets
// will be repaired.
} else {
nsIFrame* nextSibling;
// Because the next-in-flow is not the first child of the parent
// we know that it shares a parent with aChild. Therefore, we need
// to capture the next-in-flow's next sibling (in case the
// next-in-flow is the last next-in-flow for aChild AND the
// next-in-flow is not the last child in parent)
NS_ASSERTION(parent->IsChild(aChild), "screwy flow");
aChild->GetNextSibling(nextSibling);
NS_ASSERTION(nextSibling == nextInFlow, "unexpected sibling");
nextInFlow->GetNextSibling(nextSibling);
aChild->SetNextSibling(nextSibling);
}
// Delete the next-in-flow frame and adjust it's parent's child count
nextInFlow->DeleteFrame();
parent->mChildCount--;
#ifdef NS_DEBUG
aChild->GetNextInFlow(nextInFlow);
NS_POSTCONDITION(nsnull == nextInFlow, "non null next-in-flow");
#endif
return PR_TRUE;
}
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void nsTableOuterFrame::CreateInnerTableFrame(nsIPresContext* aPresContext)
{
// Do we have a prev-in-flow?
if (nsnull == mPrevInFlow) {
// No, create a column pseudo frame
mInnerTableFrame = new nsTableFrame(mContent, this);
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mChildCount++;
// Resolve style and set the style context
nsIStyleContextPtr styleContext =
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aPresContext->ResolveStyleContextFor(mContent, this);
mInnerTableFrame->SetStyleContext(aPresContext,styleContext);
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} else {
nsTableOuterFrame* prevOuterTable = (nsTableOuterFrame*)mPrevInFlow;
nsIFrame* prevInnerTable = prevOuterTable->mInnerTableFrame;
// Create a continuing column
prevInnerTable->GetNextInFlow((nsIFrame*&)mInnerTableFrame);
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if (nsnull==mInnerTableFrame)
{
nsIFrame* continuingFrame;
nsIStyleContext* kidSC;
prevInnerTable->GetStyleContext(aPresContext, kidSC);
prevInnerTable->CreateContinuingFrame(aPresContext, this, kidSC,
continuingFrame);
mInnerTableFrame = (nsTableFrame*)continuingFrame;
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mChildCount++;
}
}
}
/* ----- static methods ----- */
nsresult nsTableOuterFrame::NewFrame(nsIFrame** aInstancePtrResult,
nsIContent* aContent,
nsIFrame* aParent)
{
NS_PRECONDITION(nsnull != aInstancePtrResult, "null ptr");
if (nsnull == aInstancePtrResult) {
return NS_ERROR_NULL_POINTER;
}
nsIFrame* it = new nsTableOuterFrame(aContent, aParent);
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if (nsnull == it) {
return NS_ERROR_OUT_OF_MEMORY;
}
*aInstancePtrResult = it;
return NS_OK;
}