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pjs/layout/tables/nsTableOuterFrame.cpp

1212 строки
44 KiB
C++
Исходник Обычный вид История

moved to pub
1998-04-14 00:24:54 +04:00
/* -*- 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 "nsTableCaptionFrame.h"
#include "nsITableContent.h"
#include "nsTableContent.h"
#include "nsBodyFrame.h"
#include "nsReflowCommand.h"
#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"
#include "nsReflowCommand.h"
#ifdef NS_DEBUG
static PRBool gsDebug = PR_FALSE;
//#define NOISY
//#define NOISY_FLOW
//#define NOISY_MARGINS
#else
static const PRBool gsDebug = PR_FALSE;
#endif
static NS_DEFINE_IID(kStyleMoleculeSID, NS_STYLEMOLECULE_SID);
static NS_DEFINE_IID(kITableContentIID, NS_ITABLECONTENT_IID);
struct OuterTableReflowState {
// The body's style molecule
nsStyleMolecule* mol;
// 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 nsSize& aMaxSize,
nsStyleMolecule* aMol)
{
mol = aMol;
availSize.width = aMaxSize.width;
availSize.height = aMaxSize.height;
prevMaxPosBottomMargin = 0;
prevMaxNegBottomMargin = 0;
y=0; // border/padding/margin???
unconstrainedWidth = PRBool(aMaxSize.width == NS_UNCONSTRAINEDSIZE);
unconstrainedHeight = PRBool(aMaxSize.height == NS_UNCONSTRAINEDSIZE);
firstRowGroup = PR_TRUE;
processingCaption = PR_FALSE;
}
~OuterTableReflowState() {
}
};
/* ----------- nsTableOuterFrame ---------- */
/**
*/
nsTableOuterFrame::nsTableOuterFrame(nsIContent* aContent,
PRInt32 aIndexInParent,
nsIFrame* aParentFrame)
: nsContainerFrame(aContent, aIndexInParent, aParentFrame),
mInnerTableFrame(nsnull),
mCaptionFrames(nsnull),
mBottomCaptions(nsnull),
mMinCaptionWidth(0),
mMaxCaptionWidth(0),
mFirstPassValid(PR_FALSE)
{
}
nsTableOuterFrame::~nsTableOuterFrame()
{
if (nsnull!=mCaptionFrames)
delete mCaptionFrames;
if (nsnull!=mBottomCaptions)
delete mBottomCaptions;
}
void nsTableOuterFrame::Paint(nsIPresContext& aPresContext,
nsIRenderingContext& aRenderingContext,
const nsRect& aDirtyRect)
{
// for debug...
if (nsIFrame::GetShowFrameBorders()) {
aRenderingContext.SetColor(NS_RGB(255,0,0));
aRenderingContext.DrawRect(0, 0, mRect.width, mRect.height);
}
PaintChildren(aPresContext, aRenderingContext, aDirtyRect);
}
PRBool nsTableOuterFrame::NeedsReflow(const nsSize& aMaxSize)
{
PRBool result=PR_TRUE;
if (nsnull!=mInnerTableFrame)
result = mInnerTableFrame->NeedsReflow(aMaxSize);
return result;
}
PRBool nsTableOuterFrame::IsFirstPassValid()
{
return mFirstPassValid;
}
void nsTableOuterFrame::SetFirstPassValid(PRBool aValidState)
{
mFirstPassValid = aValidState;
}
/**
* ResizeReflow is a 2-step process.
* 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.
*/
nsIFrame::ReflowStatus nsTableOuterFrame::ResizeReflow(nsIPresContext* aPresContext,
nsReflowMetrics& aDesiredSize,
const nsSize& aMaxSize,
nsSize* aMaxElementSize)
{
if (PR_TRUE==gsDebug) printf ("***table outer frame reflow \t\t%d\n", this);
if (gsDebug==PR_TRUE)
printf("nsTableOuterFrame::ResizeReflow : maxSize=%d,%d\n",
aMaxSize.width, aMaxSize.height);
#ifdef NS_DEBUG
// replace with a check that does not assume linear placement of children
// PreReflowCheck();
#endif
// Initialize out parameter
if (nsnull != aMaxElementSize) {
aMaxElementSize->width = 0;
aMaxElementSize->height = 0;
}
PRBool reflowMappedOK = PR_TRUE;
ReflowStatus status = frComplete;
nsSize innerTableMaxElementSize(0,0);
// 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);
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);
}
// 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!
return frComplete;
nsStyleMolecule* tableStyleMol =
(nsStyleMolecule*)mStyleContext->GetData(kStyleMoleculeSID);
OuterTableReflowState state(aPresContext, aMaxSize, tableStyleMol);
// lay out captions pass 1, if necessary
if (PR_FALSE==IsFirstPassValid())
{
mFirstPassValid = PR_TRUE;
status = ResizeReflowCaptionsPass1(aPresContext, tableStyleMol);
}
// 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);
status = mInnerTableFrame->ResizeReflowPass1(aPresContext, aDesiredSize, aMaxSize,
&innerTableMaxElementSize, tableStyleMol);
#ifdef NOISY_MARGINS
nsIContent* content = mInnerTableFrame->GetContent();
nsTablePart *table = (nsTablePart*)content;
if (table != nsnull)
table->DumpCellMap();
mInnerTableFrame->ResetColumnLayoutData();
mInnerTableFrame->ListColumnLayoutData(stdout,1);
NS_IF_RELEASE(content);
#endif
}
mInnerTableFrame->SetReflowPass(nsTableFrame::kPASS_SECOND);
// assign table width info only if the inner table frame is a first-in-flow
if (nsnull==mInnerTableFrame->GetPrevInFlow())
{
// assign column widths, and assign aMaxElementSize->width
mInnerTableFrame->BalanceColumnWidths(aPresContext, tableStyleMol, aMaxSize, aMaxElementSize);
// assign table width
mInnerTableFrame->SetTableWidth(aPresContext, tableStyleMol);
}
// inner table max is now the computed width and assigned height
state.innerTableMaxSize.width = mInnerTableFrame->GetWidth();
state.innerTableMaxSize.height = aMaxSize.height;
// Reflow the child frames
if (nsnull != mFirstChild) {
reflowMappedOK = ReflowMappedChildren(aPresContext, state, aMaxElementSize);
if (PR_FALSE == reflowMappedOK) {
status = frNotComplete;
}
}
// Did we successfully relow our mapped children?
if (PR_TRUE == reflowMappedOK) {
// Any space left?
if ((nsnull != mFirstChild) && (state.availSize.height <= 0)) {
// No space left. Don't try to pull-up children or reflow unmapped
if (NextChildOffset() < mContent->ChildCount()) {
status = frNotComplete;
}
} else if (NextChildOffset() < mContent->ChildCount()) {
// Try and pull-up some children from a next-in-flow
if ((nsnull == mNextInFlow) ||
PullUpChildren(aPresContext, state, aMaxElementSize)) {
// nothing to do, we will never have unmapped children!
} else {
// We were unable to pull-up all the existing frames from the
// next in flow
status = frNotComplete;
}
}
}
if (frComplete == status) {
// 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;
aDesiredSize.height = state.y;
if (gsDebug==PR_TRUE)
{
if (nsnull!=aMaxElementSize)
printf("Outer frame Reflow complete, returning aDesiredSize = %d,%d and aMaxElementSize=%d,%d\n",
aDesiredSize.width, aDesiredSize.height,
aMaxElementSize->width, aMaxElementSize->height);
else
printf("Outer frame Reflow complete, returning aDesiredSize = %d,%d and NSNULL aMaxElementSize\n",
aDesiredSize.width, aDesiredSize.height);
}
#ifdef NS_DEBUG
// replace with a check that does not assume linear placement of children
// PostReflowCheck(status);
#endif
return status;
}
// Collapse child's top margin with previous bottom margin
nscoord nsTableOuterFrame::GetTopMarginFor(nsIPresContext* aCX,
OuterTableReflowState& aState,
nsStyleMolecule* aKidMol)
{
nscoord margin;
nscoord maxNegTopMargin = 0;
nscoord maxPosTopMargin = 0;
if ((margin = aKidMol->margin.top) < 0) {
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( nsIPresContext* aPresContext,
OuterTableReflowState& aState,
nsIFrame* aKidFrame,
const nsRect& aKidRect,
nsStyleMolecule* aKidMol,
nsSize* aMaxElementSize,
nsSize& aKidMaxElementSize)
{
if (PR_TRUE==gsDebug) printf ("place child: %p with aKidRect %d %d %d %d\n",
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 lastContentIsComplete = mLastContentIsComplete;
nsSize kidMaxElementSize;
nsSize* pKidMaxElementSize = (nsnull != aMaxElementSize) ? &kidMaxElementSize : nsnull;
PRBool result = PR_TRUE;
for (nsIFrame* kidFrame = mFirstChild; nsnull != kidFrame; ) {
nsSize kidAvailSize(aState.innerTableMaxSize.width, aState.availSize.height);
nsReflowMetrics desiredSize;
nsIFrame::ReflowStatus status;
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
nsIStyleContext* kidSC = kidFrame->GetStyleContext(aPresContext);
nsStyleMolecule* kidMol = (nsStyleMolecule*)kidSC->GetData(kStyleMoleculeSID);
nscoord topMargin = GetTopMarginFor(aPresContext, aState, kidMol);
nscoord bottomMargin = kidMol->margin.bottom;
NS_RELEASE(kidSC);
// 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) {
kidAvailSize.height -= topMargin;
}
// Subtract off for left and right margin
if (PR_FALSE == aState.unconstrainedWidth) {
kidAvailSize.width -= kidMol->margin.left + kidMol->margin.right;
}
// Only skip the reflow if this is not our first child and we are
// out of space.
if ((kidFrame == mFirstChild) || (kidAvailSize.height > 0)) {
// Reflow the child into the available space
status = ReflowChild(kidFrame, aPresContext, desiredSize,
kidAvailSize, pKidMaxElementSize,
aState);
}
// Did the child fit?
if ((kidFrame != mFirstChild) &&
((kidAvailSize.height <= 0) ||
(desiredSize.height > kidAvailSize.height)))
{
// The child's height is too big to fit at all in our remaining space,
// and it's not our first child.
//
// Note that if the width is too big that's okay and we allow the
// child to extend horizontally outside of the reflow area
// Since we are giving the next-in-flow our last child, we
// give it our original mLastContentIsComplete, too (in case we
// are pushing into an empty next-in-flow)
if (PR_TRUE==gsDebug) printf ("ReflowMappedChildren: calling PushChildren\n");
PushChildren(kidFrame, prevKidFrame, lastContentIsComplete);
// Our mLastContentIsComplete was already set by the last kid we
// reflowed reflow's status
result = PR_FALSE;
break;
}
// Place the child after taking into account it's margin
aState.y += topMargin;
nsRect kidRect (0, 0, desiredSize.width, desiredSize.height);
kidRect.x += kidMol->margin.left;
kidRect.y += aState.y;
if (PR_TRUE==gsDebug) printf ("ReflowMappedChildren: calling PlaceChild\n");
PlaceChild(aPresContext, aState, kidFrame, kidRect, kidMol, aMaxElementSize,
kidMaxElementSize);
if (bottomMargin < 0) {
aState.prevMaxNegBottomMargin = -bottomMargin;
} else {
aState.prevMaxPosBottomMargin = bottomMargin;
}
childCount++;
// Update mLastContentIsComplete now that this kid fits
mLastContentIsComplete = PRBool(status == frComplete);
// Special handling for incomplete children
if (frNotComplete == status) {
// XXX It's good to assume that we might still have room
// even if the child didn't complete (floaters will want this)
nsIFrame* kidNextInFlow = kidFrame->GetNextInFlow();
if (nsnull == kidNextInFlow) {
// No the child isn't complete, and it doesn't have a next in flow so
// create a continuing frame. This hooks the child into the flow.
nsIFrame* continuingFrame =
kidFrame->CreateContinuingFrame(aPresContext, this);
// Insert the frame. We'll reflow it next pass through the loop
nsIFrame* nextSib = kidFrame->GetNextSibling();
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;
}
}
}
// Get the next child
prevKidFrame = kidFrame;
kidFrame = kidFrame->GetNextSibling();
// 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(LastChild() == prevKidFrame, "unexpected last child");
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)
{
#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
NS_PRECONDITION(nsnull != mNextInFlow, "null next-in-flow");
nsTableOuterFrame* nextInFlow = (nsTableOuterFrame*)mNextInFlow;
nsSize kidMaxElementSize;
nsSize* pKidMaxElementSize = (nsnull != aMaxElementSize) ? &kidMaxElementSize : nsnull;
// The frame previous to the current frame we are reflowing. This
// starts out initially as our last frame.
nsIFrame* prevKidFrame = LastChild();
// 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;
PRBool result = PR_TRUE;
while (nsnull != nextInFlow) {
nsReflowMetrics desiredSize;
nsSize kidAvailSize(aState.availSize);
// Get first available frame from the next-in-flow
nsIFrame* kidFrame = PullUpOneChild(nextInFlow, prevKidFrame);
if (nsnull == kidFrame) {
// We've pulled up all the children from that next-in-flow, so
// move to the next next-in-flow.
nextInFlow = (nsTableOuterFrame*) nextInFlow->mNextInFlow;
continue;
}
// Get top margin for this kid
nsIContent* kid = kidFrame->GetContent();
nsIStyleContext* kidSC = kidFrame->GetStyleContext(aPresContext);
nsStyleMolecule* kidMol = (nsStyleMolecule*)kidSC->GetData(kStyleMoleculeSID);
nscoord topMargin = GetTopMarginFor(aPresContext, aState, kidMol);
nscoord bottomMargin = kidMol->margin.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) {
kidAvailSize.height -= topMargin;
}
// Subtract off for left and right margin
if (PR_FALSE == aState.unconstrainedWidth) {
kidAvailSize.width -= kidMol->margin.left + kidMol->margin.right;
}
ReflowStatus status;
do {
// Only skip the reflow if this is not our first child and we are
// out of space.
if ((kidFrame == mFirstChild) || (kidAvailSize.height > 0)) {
SetReflowState(aState, kidFrame);
status = ReflowChild(kidFrame, aPresContext, desiredSize,
kidAvailSize, pKidMaxElementSize,
aState);
}
// Did the child fit?
if ((kidFrame != mFirstChild) &&
((kidAvailSize.height <= 0) ||
(desiredSize.height > kidAvailSize.height)))
{
// The child's height is too big to fit at all in our remaining space,
// and it wouldn't have been our first child.
//
// Note that if the width is too big that's okay and we allow the
// child to extend horizontally outside of the reflow area
PRBool lastComplete = PRBool(nsnull == kidFrame->GetNextInFlow());
PushChildren(kidFrame, prevKidFrame, lastComplete);
mLastContentIsComplete = prevLastContentIsComplete;
mChildCount--;
result = PR_FALSE;
NS_RELEASE(kid);
NS_RELEASE(kidSC);
goto push_done;
}
// Place the child
aState.y += topMargin;
nsRect kidRect (0, 0, desiredSize.width, desiredSize.height);
kidRect.x += kidMol->margin.left;
kidRect.y += aState.y;
PlaceChild(aPresContext, aState, kidFrame, kidRect, kidMol, aMaxElementSize,
kidMaxElementSize);
if (bottomMargin < 0) {
aState.prevMaxNegBottomMargin = -bottomMargin;
} else {
aState.prevMaxPosBottomMargin = bottomMargin;
}
mLastContentIsComplete = PRBool(status == frComplete);
#ifdef NOISY
ListTag(stdout);
printf(": pulled up ");
((nsFrame*)kidFrame)->ListTag(stdout);
printf("\n");
#endif
// Is the child we just pulled up complete?
if (frNotComplete == status) {
// No the child isn't complete.
nsIFrame* kidNextInFlow = kidFrame->GetNextInFlow();
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 =
kidFrame->CreateContinuingFrame(aPresContext, this);
// Add the continuing frame to our sibling list.
continuingFrame->SetNextSibling(kidFrame->GetNextSibling());
kidFrame->SetNextSibling(continuingFrame);
prevKidFrame = kidFrame;
prevLastContentIsComplete = mLastContentIsComplete;
kidFrame = continuingFrame;
mChildCount++;
} else {
// The child has a next-in-flow, but it's not one of ours.
// It *must* be in one of our next-in-flows. Collect it
// then.
NS_ASSERTION(kidNextInFlow->GetGeometricParent() != this,
"busted kid next-in-flow");
break;
}
}
} while (frNotComplete == status);
NS_RELEASE(kid);
NS_RELEASE(kidSC);
prevKidFrame = kidFrame;
prevLastContentIsComplete = mLastContentIsComplete;
}
push_done:;
// Update our last content index
if (nsnull != prevKidFrame) {
NS_ASSERTION(LastChild() == prevKidFrame, "bad last child");
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 = (nsTableOuterFrame*)nextInFlow->GetNextInFlow();
}
#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)
{
nsIContent *kid = aKidFrame->GetContent(); // kid: REFCNT++
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;
NS_RELEASE(kid); // kid: REFCNT--
}
/**
* 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.
*/
nsIFrame::ReflowStatus
nsTableOuterFrame::ReflowChild( nsIFrame* aKidFrame,
nsIPresContext* aPresContext,
nsReflowMetrics& aDesiredSize,
const nsSize& aMaxSize,
nsSize* aMaxElementSize,
OuterTableReflowState& aState)
{
ReflowStatus status;
/* call the appropriate reflow method based on the type and position of the child */
// if (((nsSplittableFrame*)aKidFrame)->GetFirstInFlow()!=mInnerTableFrame)
if (PR_TRUE==aState.processingCaption)
{ // it's a caption, find out if it's top or bottom
// Resolve style
nsIStyleContext* captionStyleContext = aKidFrame->GetStyleContext(aPresContext);
NS_ASSERTION(nsnull != captionStyleContext, "null style context for caption");
nsStyleMolecule* captionStyle =
(nsStyleMolecule*)captionStyleContext->GetData(kStyleMoleculeSID);
NS_ASSERTION(nsnull != captionStyle, "null style molecule for caption");
if (NS_STYLE_VERTICAL_ALIGN_BOTTOM==captionStyle->verticalAlign)
status = ResizeReflowBottomCaptionsPass2(aPresContext, aDesiredSize,
aMaxSize, aMaxElementSize,
aState.mol, aState.y);
else
status = ResizeReflowTopCaptionsPass2(aPresContext, aDesiredSize,
aMaxSize, aMaxElementSize,
aState.mol);
}
else
status = ((nsTableFrame*)aKidFrame)->ResizeReflowPass2(aPresContext, aDesiredSize, aState.innerTableMaxSize,
aMaxElementSize, aState.mol,
mMinCaptionWidth, mMaxCaptionWidth);
if (frComplete == status) {
nsIFrame* kidNextInFlow = aKidFrame->GetNextInFlow();
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 = (nsTableOuterFrame*)
aKidFrame->GetGeometricParent();
parent->DeleteChildsNextInFlow(aKidFrame);
}
}
return status;
}
void nsTableOuterFrame::CreateChildFrames(nsIPresContext* aPresContext)
{
nsIFrame *prevKidFrame = nsnull;
nsresult frameCreated = nsTableFrame::NewFrame((nsIFrame **)(&mInnerTableFrame), mContent, 0, this);
if (NS_OK!=frameCreated)
return; // SEC: an error!!!!
// Resolve style
nsIStyleContext* kidStyleContext =
aPresContext->ResolveStyleContextFor(mContent, this);
NS_ASSERTION(nsnull!=kidStyleContext, "bad style context for kid.");
mInnerTableFrame->SetStyleContext(kidStyleContext);
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++) {
nsIContent* caption = mContent->ChildAt(kidIndex); // caption: REFCNT++
if (nsnull == caption) {
break;
}
const PRInt32 contentType = ((nsTableContent *)caption)->GetType();
if (contentType==nsITableContent::kTableCaptionType)
{
nsIFrame *captionFrame=nsnull;
frameCreated = nsTableCaptionFrame::NewFrame(&captionFrame, caption, 0, this);
if (NS_OK!=frameCreated)
return; // SEC: an error!!!!
// Resolve style
nsIStyleContext* captionStyleContext =
aPresContext->ResolveStyleContextFor(caption, this);
NS_ASSERTION(nsnull!=captionStyleContext, "bad style context for caption.");
nsStyleMolecule* captionStyle =
(nsStyleMolecule*)captionStyleContext->GetData(kStyleMoleculeSID);
captionFrame->SetStyleContext(captionStyleContext);
mChildCount++;
// Link child frame into the list of children
if (NS_STYLE_VERTICAL_ALIGN_BOTTOM==captionStyle->verticalAlign)
{ // 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
lastTopCaption->SetNextSibling(captionFrame);
lastTopCaption = captionFrame;
}
lastTopCaption = captionFrame;
}
mCaptionFrames->AppendElement(captionFrame);
NS_RELEASE(caption); // caption: REFCNT--
}
else
{
NS_RELEASE(caption); // caption: REFCNT--
break;
}
}
}
nsIFrame::ReflowStatus
nsTableOuterFrame::ResizeReflowCaptionsPass1(nsIPresContext* aPresContext, nsStyleMolecule* aTableStyle)
{
if (nsnull!=mCaptionFrames)
{
PRInt32 numCaptions = mCaptionFrames->Count();
for (PRInt32 captionIndex = 0; captionIndex < numCaptions; captionIndex++)
{
nsSize maxElementSize(0,0);
nsSize maxSize(NS_UNCONSTRAINEDSIZE, NS_UNCONSTRAINEDSIZE);
nsReflowMetrics desiredSize;
nsTableCaptionFrame *captionFrame = (nsTableCaptionFrame *)mCaptionFrames->ElementAt(captionIndex);
captionFrame->ResizeReflow(aPresContext, desiredSize, maxSize, &maxElementSize);
if (mMinCaptionWidth<maxElementSize.width)
mMinCaptionWidth = maxElementSize.width;
if (mMaxCaptionWidth<desiredSize.width)
mMaxCaptionWidth = desiredSize.width;
captionFrame->VerticallyAlignChild(aPresContext);
}
}
return frComplete;
}
nsIFrame::ReflowStatus
nsTableOuterFrame::ResizeReflowTopCaptionsPass2(nsIPresContext* aPresContext,
nsReflowMetrics& aDesiredSize,
const nsSize& aMaxSize,
nsSize* aMaxElementSize,
nsStyleMolecule* aTableStyle)
{
ReflowStatus result = frComplete;
nscoord topCaptionY = 0;
if (nsnull!=mCaptionFrames)
{
PRInt32 numCaptions = mCaptionFrames->Count();
for (PRInt32 captionIndex = 0; captionIndex < numCaptions; captionIndex++)
{
// get the caption
nsTableCaptionFrame *captionFrame = (nsTableCaptionFrame *)mCaptionFrames->ElementAt(captionIndex);
// Resolve style
nsIStyleContext* captionStyleContext = captionFrame->GetStyleContext(aPresContext);
NS_ASSERTION(nsnull != captionStyleContext, "null style context for caption");
nsStyleMolecule* captionStyle =
(nsStyleMolecule*)captionStyleContext->GetData(kStyleMoleculeSID);
NS_ASSERTION(nsnull != captionStyle, "null style molecule for caption");
if (NS_STYLE_VERTICAL_ALIGN_BOTTOM==captionStyle->verticalAlign)
{
}
else
{ // top-align captions, the default
// reflow the caption, skipping top captions after the first that doesn't fit
if (frComplete==result)
{
nsReflowMetrics desiredSize;
result = nsContainerFrame::ReflowChild(captionFrame, aPresContext, desiredSize, aMaxSize, nsnull);
// 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);
if (0==captionFrame->GetIndexInParent())
{
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;
}
nsIFrame::ReflowStatus
nsTableOuterFrame::ResizeReflowBottomCaptionsPass2(nsIPresContext* aPresContext,
nsReflowMetrics& aDesiredSize,
const nsSize& aMaxSize,
nsSize* aMaxElementSize,
nsStyleMolecule* aTableStyle,
nscoord aYOffset)
{
ReflowStatus result = frComplete;
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
nsTableCaptionFrame *captionFrame = (nsTableCaptionFrame *)mBottomCaptions->ElementAt(captionIndex);
// Resolve style
/*
nsIStyleContext* captionStyleContext = captionFrame->GetStyleContext(aPresContext);
NS_ASSERTION(nsnull != captionStyleContext, "null style context for caption");
nsStyleMolecule* captionStyle =
(nsStyleMolecule*)captionStyleContext->GetData(kStyleMoleculeSID);
NS_ASSERTION(nsnull != captionStyle, "null style molecule for caption");
*/
// reflow the caption
nsReflowMetrics desiredSize;
result = nsContainerFrame::ReflowChild(captionFrame, aPresContext, desiredSize, aMaxSize, nsnull);
// place the caption
nsRect rect = captionFrame->GetRect();
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;
}
/**
* 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");
}
*/
nsIFrame::ReflowStatus
nsTableOuterFrame::IncrementalReflow(nsIPresContext* aPresContext,
nsReflowMetrics& aDesiredSize,
const nsSize& aMaxSize,
nsReflowCommand& aReflowCommand)
{
if (gsDebug == PR_TRUE) printf("nsTableOuterFrame::IncrementalReflow\n");
// total hack for now, just some hard-coded values
ResizeReflow(aPresContext, aDesiredSize, aMaxSize, nsnull);
return frComplete;
}
nsIFrame* nsTableOuterFrame::CreateContinuingFrame(nsIPresContext* aPresContext,
nsIFrame* aParent)
{
nsTableOuterFrame* cf = new nsTableOuterFrame(mContent, mIndexInParent, aParent);
PrepareContinuingFrame(aPresContext, aParent, cf);
cf->SetFirstPassValid(PR_TRUE);
printf("nsTableOuterFrame::CCF parent = %p, this=%p, cf=%p\n", aParent, this, cf);
return cf;
}
void nsTableOuterFrame::PrepareContinuingFrame(nsIPresContext* aPresContext,
nsIFrame* aParent,
nsTableOuterFrame* aContFrame)
{
// 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);
// Resolve style for the continuing frame and set its style context.
// XXX presumptive
nsIStyleContext* styleContext =
aPresContext->ResolveStyleContextFor(mContent, aParent);
aContFrame->SetStyleContext(styleContext);
NS_RELEASE(styleContext);
}
void nsTableOuterFrame::VerifyTree() const
{
#ifdef NS_DEBUG
#endif
}
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, mIndexInParent, this);
mChildCount++;
// Resolve style and set the style context
nsIStyleContext* styleContext =
aPresContext->ResolveStyleContextFor(mContent, this);
mInnerTableFrame->SetStyleContext(styleContext);
NS_RELEASE(styleContext);
} else {
nsTableOuterFrame* prevOuterTable = (nsTableOuterFrame*)mPrevInFlow;
nsIFrame* prevInnerTable = prevOuterTable->mInnerTableFrame;
// Create a continuing column
mInnerTableFrame = (nsTableFrame *)prevInnerTable->GetNextInFlow();
if (nsnull==mInnerTableFrame)
{
mInnerTableFrame = (nsTableFrame *)prevInnerTable->CreateContinuingFrame(aPresContext, this);
mChildCount++;
}
}
}
/* ----- static methods ----- */
nsresult nsTableOuterFrame::NewFrame(nsIFrame** aInstancePtrResult,
nsIContent* aContent,
PRInt32 aIndexInParent,
nsIFrame* aParent)
{
NS_PRECONDITION(nsnull != aInstancePtrResult, "null ptr");
if (nsnull == aInstancePtrResult) {
return NS_ERROR_NULL_POINTER;
}
nsIFrame* it = new nsTableOuterFrame(aContent, aIndexInParent, aParent);
if (nsnull == it) {
return NS_ERROR_OUT_OF_MEMORY;
}
*aInstancePtrResult = it;
return NS_OK;
}