зеркало из https://github.com/mozilla/pjs.git
1185 строки
40 KiB
C++
1185 строки
40 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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*
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* The contents of this file are subject to the Netscape Public License
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* Version 1.0 (the "NPL"); you may not use this file except in
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* compliance with the NPL. You may obtain a copy of the NPL at
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* http://www.mozilla.org/NPL/
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*
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* Software distributed under the NPL is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
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* for the specific language governing rights and limitations under the
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* NPL.
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*
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* The Initial Developer of this code under the NPL is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All Rights
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* Reserved.
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*/
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#include "nsInlineFrame.h"
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#include "nsSize.h"
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#include "nsIContent.h"
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#include "nsIContentDelegate.h"
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#include "nsIStyleContext.h"
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#include "nsStyleConsts.h"
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#include "nsIPresContext.h"
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#include "nsIPresShell.h"
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#include "nsCSSLayout.h"
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#include "nsPlaceholderFrame.h"
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#include "nsReflowCommand.h"
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#include "nsHTMLAtoms.h"
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#include "nsAbsoluteFrame.h"
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#include "nsLeafFrame.h"
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#include "nsIPtr.h"
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// XXX To Do:
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// 2. horizontal child margins
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// 3. borders/padding and splitting
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// 4. child relative positioning
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// 5. absolutely positioned children
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// 6. direction support
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// 7. CSS line-height property
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/* XXX */
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#include "nsHTMLIIDs.h"
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#include "nsBlockFrame.h"
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#define DEFAULT_ASCENT_LEN 10
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NS_DEF_PTR(nsIStyleContext);
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NS_DEF_PTR(nsIContent);
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NS_DEF_PTR(nsIContentDelegate);
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class nsInlineState
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{
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public:
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nsStyleFont* font; // style font
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nsMargin borderPadding; // inner margin
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nsSize mStyleSize;
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PRIntn mStyleSizeFlags;
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nsSize availSize; // available space in which to reflow (starts as max size minus insets)
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nsSize* maxElementSize; // maximum element size (may be null)
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nscoord x; // running x-offset (starts at left inner edge)
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const nscoord y; // y-offset (top inner edge)
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nscoord maxAscent; // max child ascent
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nscoord maxDescent; // max child descent
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nscoord* ascents; // ascent information for each child
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PRBool unconstrainedWidth;
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PRBool unconstrainedHeight;
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// Constructor
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nsInlineState(nsStyleFont* aStyleFont,
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const nsMargin& aBorderPadding,
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const nsSize& aMaxSize,
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nsSize* aMaxElementSize)
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: x(aBorderPadding.left), // determined by inner edge
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y(aBorderPadding.top) // determined by inner edge
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{
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font = aStyleFont;
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borderPadding = aBorderPadding;
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unconstrainedWidth = PRBool(aMaxSize.width == NS_UNCONSTRAINEDSIZE);
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unconstrainedHeight = PRBool(aMaxSize.height == NS_UNCONSTRAINEDSIZE);
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// If we're constrained adjust the available size so it excludes space
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// needed for border/padding
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availSize.width = aMaxSize.width;
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if (PR_FALSE == unconstrainedWidth) {
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availSize.width -= aBorderPadding.left + aBorderPadding.right;
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}
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availSize.height = aMaxSize.height;
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if (PR_FALSE == unconstrainedHeight) {
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availSize.height -= aBorderPadding.top + aBorderPadding.bottom;
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}
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// Initialize max element size
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maxElementSize = aMaxElementSize;
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if (nsnull != maxElementSize) {
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maxElementSize->SizeTo(0, 0);
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}
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ascents = ascentBuf;
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maxAscent = 0;
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maxDescent = 0;
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}
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void SetNumAscents(PRIntn aNumAscents) {
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// We keep around ascent information so that we can vertically align
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// children after we figure out how many children fit.
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if (aNumAscents > DEFAULT_ASCENT_LEN) {
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ascents = new nscoord[aNumAscents];
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}
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}
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// Destructor
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~nsInlineState() {
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if (ascents != ascentBuf) {
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delete ascents;
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}
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}
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private:
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nscoord ascentBuf[DEFAULT_ASCENT_LEN];
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};
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/////////////////////////////////////////////////////////////////////////////
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//
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nsresult nsInlineFrame::NewFrame(nsIFrame** aInstancePtrResult,
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nsIContent* aContent,
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nsIFrame* aParent)
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{
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NS_PRECONDITION(nsnull != aInstancePtrResult, "null ptr");
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if (nsnull == aInstancePtrResult) {
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return NS_ERROR_NULL_POINTER;
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}
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nsIFrame* it = new nsInlineFrame(aContent, aParent);
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if (nsnull == it) {
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return NS_ERROR_OUT_OF_MEMORY;
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}
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*aInstancePtrResult = it;
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return NS_OK;
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}
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nsInlineFrame::nsInlineFrame(nsIContent* aContent, nsIFrame* aParent)
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: nsHTMLContainerFrame(aContent, aParent)
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{
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NS_PRECONDITION(!IsPseudoFrame(), "can not be a pseudo frame");
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}
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nsInlineFrame::~nsInlineFrame()
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{
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}
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void nsInlineFrame::PlaceChild(nsIFrame* aChild,
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PRInt32 aIndex,
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nsInlineState& aState,
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const nsReflowMetrics& aChildSize,
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const nsSize* aChildMaxElementSize)
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{
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// Set the child's rect
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aChild->SetRect(nsRect(aState.x, aState.y, aChildSize.width, aChildSize.height));
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// Adjust the running x-offset
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aState.x += aChildSize.width;
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// Update the array of ascents and the max ascent and descent
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aState.ascents[aIndex] = aChildSize.ascent;
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if (aChildSize.ascent > aState.maxAscent) {
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aState.maxAscent = aChildSize.ascent;
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}
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if (aChildSize.descent > aState.maxDescent) {
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aState.maxDescent = aChildSize.descent;
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}
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// If we're constrained then update the available width
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if (!aState.unconstrainedWidth) {
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aState.availSize.width -= aChildSize.width;
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}
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// Update the maximum element size
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if (nsnull != aChildMaxElementSize) {
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if (aChildMaxElementSize->width > aState.maxElementSize->width) {
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aState.maxElementSize->width = aChildMaxElementSize->width;
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}
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if (aChildMaxElementSize->height > aState.maxElementSize->height) {
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aState.maxElementSize->height = aChildMaxElementSize->height;
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}
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}
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}
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/**
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* Reflow the frames we've already created
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*
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* @param aPresContext presentation context to use
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* @param aState current inline state
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* @param aChildFrame the first child frame to reflow
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* @param aChildIndex the first child frame's index in the frame list
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* @return true if we successfully reflowed all the mapped children and false
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* otherwise, e.g. we pushed children to the next in flow
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*/
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PRBool nsInlineFrame::ReflowMappedChildrenFrom(nsIPresContext* aPresContext,
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nsInlineState& aState,
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nsIFrame* aChildFrame,
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PRInt32 aChildIndex)
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{
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#ifdef NS_DEBUG
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if (GetVerifyTreeEnable()) {
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VerifyLastIsComplete();
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}
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#endif
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NS_PRECONDITION(nsnull != aChildFrame, "no children");
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PRInt32 childCount = aChildIndex;
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nsIFrame* prevKidFrame = nsnull;
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// Remember our original mLastContentIsComplete so that if we end up
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// having to push children, we have the correct value to hand to
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// PushChildren.
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PRBool originalLastContentIsComplete = mLastContentIsComplete;
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nsSize kidMaxElementSize;
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nsSize* pKidMaxElementSize = (nsnull != aState.maxElementSize) ? &kidMaxElementSize : nsnull;
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PRBool result = PR_TRUE;
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for (nsIFrame* kidFrame = aChildFrame; nsnull != kidFrame; ) {
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nsReflowMetrics kidSize;
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nsReflowStatus status;
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// Reflow the child into the available space
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kidFrame->WillReflow(*aPresContext);
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status = ReflowChild(kidFrame, aPresContext, kidSize, aState.availSize,
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pKidMaxElementSize);
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// Did the child fit?
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if ((kidSize.width > aState.availSize.width) && (kidFrame != mFirstChild)) {
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// The child is too wide to fit in the available space, and it's
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// not our first child
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// Since we are giving the next-in-flow our last child, we
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// give it our original mLastContentIsComplete too (in case we
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// are pushing into an empty next-in-flow)
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PushChildren(kidFrame, prevKidFrame, originalLastContentIsComplete);
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SetLastContentOffset(prevKidFrame);
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result = PR_FALSE;
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break;
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}
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// Place and size the child. We'll deal with vertical alignment when
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// we're all done
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PlaceChild(kidFrame, childCount, aState, kidSize, pKidMaxElementSize);
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childCount++;
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// Remember where we just were in case we end up pushing children
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prevKidFrame = kidFrame;
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// Is the child complete?
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mLastContentIsComplete = NS_FRAME_IS_COMPLETE(status);
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if (NS_FRAME_IS_NOT_COMPLETE(status)) {
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// No, the child isn't complete
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nsIFrame* kidNextInFlow;
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kidFrame->GetNextInFlow(kidNextInFlow);
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PRBool lastContentIsComplete = mLastContentIsComplete;
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if (nsnull == kidNextInFlow) {
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// The child doesn't have a next-in-flow so create a continuing
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// frame. This hooks the child into the flow
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nsIFrame* continuingFrame;
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nsIStyleContextPtr kidSC;
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kidFrame->GetStyleContext(aPresContext, kidSC.AssignRef());
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kidFrame->CreateContinuingFrame(aPresContext, this, kidSC,
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continuingFrame);
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NS_ASSERTION(nsnull != continuingFrame, "frame creation failed");
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// Add the continuing frame to the sibling list
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nsIFrame* nextSib;
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kidFrame->GetNextSibling(nextSib);
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continuingFrame->SetNextSibling(nextSib);
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kidFrame->SetNextSibling(continuingFrame);
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if (nsnull == nextSib) {
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// Assume that the continuation frame we just created is
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// complete, for now. It will get reflowed by our
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// next-in-flow (we are going to push it now)
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lastContentIsComplete = PR_TRUE;
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}
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}
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// We've used up all of our available space so push the remaining
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// children to the next-in-flow
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nsIFrame* nextSibling;
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kidFrame->GetNextSibling(nextSibling);
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if (nsnull != nextSibling) {
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PushChildren(nextSibling, kidFrame, lastContentIsComplete);
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SetLastContentOffset(prevKidFrame);
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}
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result = PR_FALSE;
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break;
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}
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// Get the next child frame
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kidFrame->GetNextSibling(kidFrame);
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// XXX talk with troy about checking for available space here
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}
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// Update the child count member data
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mChildCount = childCount;
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#ifdef NS_DEBUG
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if (GetVerifyTreeEnable()) {
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NS_POSTCONDITION(LengthOf(mFirstChild) == mChildCount, "bad child count");
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nsIFrame* lastChild;
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PRInt32 lastIndexInParent;
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LastChild(lastChild);
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lastChild->GetContentIndex(lastIndexInParent);
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NS_POSTCONDITION(lastIndexInParent == mLastContentOffset, "bad last content offset");
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VerifyLastIsComplete();
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}
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#endif
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return result;
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}
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/**
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* Try and pull-up frames from our next-in-flow
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*
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* @param aPresContext presentation context to use
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* @param aState current inline state
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* @return true if we successfully pulled-up all the children and false
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* otherwise, e.g. child didn't fit
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*/
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PRBool nsInlineFrame::PullUpChildren(nsIPresContext* aPresContext,
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nsInlineState& aState)
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{
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#ifdef NS_DEBUG
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if (GetVerifyTreeEnable()) {
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VerifyLastIsComplete();
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}
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#endif
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nsInlineFrame* nextInFlow = (nsInlineFrame*)mNextInFlow;
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nsSize kidMaxElementSize;
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nsSize* pKidMaxElementSize = (nsnull != aState.maxElementSize) ? &kidMaxElementSize : nsnull;
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#ifdef NS_DEBUG
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PRInt32 kidIndex = NextChildOffset();
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#endif
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nsIFrame* prevKidFrame;
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LastChild(prevKidFrame);
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// This will hold the prevKidFrame's mLastContentIsComplete
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// status. If we have to push the frame that follows prevKidFrame
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// then this will become our mLastContentIsComplete state. Since
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// prevKidFrame is initially our last frame, it's completion status
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// is our mLastContentIsComplete value.
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PRBool prevLastContentIsComplete = mLastContentIsComplete;
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PRBool result = PR_TRUE;
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while (nsnull != nextInFlow) {
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nsReflowMetrics kidSize;
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nsReflowStatus status;
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// Get the next child
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nsIFrame* kidFrame = nextInFlow->mFirstChild;
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// Any more child frames?
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if (nsnull == kidFrame) {
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// No. Any frames on its overflow list?
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if (nsnull != nextInFlow->mOverflowList) {
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// Move the overflow list to become the child list
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NS_ABORT();
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nextInFlow->AppendChildren(nextInFlow->mOverflowList);
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nextInFlow->mOverflowList = nsnull;
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kidFrame = nextInFlow->mFirstChild;
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} else {
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// We've pulled up all the children, so move to the next-in-flow.
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nextInFlow = (nsInlineFrame*)nextInFlow->mNextInFlow;
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continue;
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}
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}
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// XXX if the frame being pulled up is not appropriate (e.g. a block
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// frame) then we should stop! If we have an inline BR tag we should
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// stop too!
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// See if the child fits in the available space. If it fits or
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// it's splittable then reflow it. The reason we can't just move
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// it is that we still need ascent/descent information
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nsSize kidFrameSize;
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nsSplittableType kidIsSplittable;
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kidFrame->GetSize(kidFrameSize);
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kidFrame->IsSplittable(kidIsSplittable);
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if ((kidFrameSize.width > aState.availSize.width) &&
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NS_FRAME_IS_NOT_SPLITTABLE(kidIsSplittable)) {
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result = PR_FALSE;
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mLastContentIsComplete = prevLastContentIsComplete;
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break;
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}
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kidFrame->WillReflow(*aPresContext);
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status = ReflowChild(kidFrame, aPresContext, kidSize, aState.availSize,
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pKidMaxElementSize);
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// Did the child fit?
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if ((kidSize.width > aState.availSize.width) && (nsnull != mFirstChild)) {
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// The child is too wide to fit in the available space, and it's
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// not our first child
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result = PR_FALSE;
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mLastContentIsComplete = prevLastContentIsComplete;
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break;
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}
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// Place and size the child. We'll deal with vertical alignment when
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// we're all done
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PlaceChild(kidFrame, mChildCount, aState, kidSize, pKidMaxElementSize);
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// Remove the frame from its current parent
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kidFrame->GetNextSibling(nextInFlow->mFirstChild);
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nextInFlow->mChildCount--;
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// Update the next-in-flows first content offset
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if (nsnull != nextInFlow->mFirstChild) {
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nextInFlow->SetFirstContentOffset(nextInFlow->mFirstChild);
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}
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// Link the frame into our list of children
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kidFrame->SetGeometricParent(this);
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nsIFrame* kidContentParent;
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kidFrame->GetContentParent(kidContentParent);
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if (nextInFlow == kidContentParent) {
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kidFrame->SetContentParent(this);
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}
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if (nsnull == prevKidFrame) {
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mFirstChild = kidFrame;
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SetFirstContentOffset(kidFrame);
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} else {
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prevKidFrame->SetNextSibling(kidFrame);
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}
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kidFrame->SetNextSibling(nsnull);
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mChildCount++;
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// Remember where we just were in case we end up pushing children
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prevKidFrame = kidFrame;
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prevLastContentIsComplete = mLastContentIsComplete;
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// Is the child we just pulled up complete?
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mLastContentIsComplete = NS_FRAME_IS_COMPLETE(status);
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if (NS_FRAME_IS_NOT_COMPLETE(status)) {
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// No the child isn't complete
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nsIFrame* kidNextInFlow;
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kidFrame->GetNextInFlow(kidNextInFlow);
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if (nsnull == kidNextInFlow) {
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// The child doesn't have a next-in-flow so create a
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// continuing frame. The creation appends it to the flow and
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// prepares it for reflow.
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nsIFrame* continuingFrame;
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nsIStyleContextPtr kidSC;
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kidFrame->GetStyleContext(aPresContext, kidSC.AssignRef());
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kidFrame->CreateContinuingFrame(aPresContext, this, kidSC,
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continuingFrame);
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NS_ASSERTION(nsnull != continuingFrame, "frame creation failed");
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// Add the continuing frame to our sibling list and then push
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// it to the next-in-flow. This ensures the next-in-flow's
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// content offsets and child count are set properly. Note that
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// we can safely assume that the continuation is complete so
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// we pass PR_TRUE into PushChidren in case our next-in-flow
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// was just drained and now needs to know it's
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// mLastContentIsComplete state.
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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
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// with mLastContentIsComplete beause the continuation frame
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// is no longer on *our* list.
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}
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// If the child isn't complete then it means that we've used up
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// all of our available space.
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result = PR_FALSE;
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break;
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}
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}
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// Update our last content offset
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if (nsnull != prevKidFrame) {
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NS_ASSERTION(IsLastChild(prevKidFrame), "bad last child");
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SetLastContentOffset(prevKidFrame);
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}
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// We need to make sure the first content offset is correct for any empty
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// next-in-flow frames (frames where we pulled up all the child frames)
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nextInFlow = (nsInlineFrame*)mNextInFlow;
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if ((nsnull != nextInFlow) && (nsnull == nextInFlow->mFirstChild)) {
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// We have at least one empty frame. Did we succesfully pull up all the
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// child frames?
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if (PR_FALSE == result) {
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// No, so we need to adjust the first content offset of all the empty
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// 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
|
|
if (GetVerifyTreeEnable()) {
|
|
while (nsnull != nextInFlow) {
|
|
NS_ASSERTION(nsnull == nextInFlow->mFirstChild,
|
|
"non-empty next-in-flow");
|
|
nextInFlow = (nsInlineFrame*)nextInFlow->mNextInFlow;
|
|
}
|
|
}
|
|
#endif
|
|
}
|
|
}
|
|
|
|
#ifdef NS_DEBUG
|
|
if (GetVerifyTreeEnable()) {
|
|
VerifyLastIsComplete();
|
|
}
|
|
#endif
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* Create new frames for content we haven't yet mapped
|
|
*
|
|
* @param aPresContext presentation context to use
|
|
* @param aState current inline state
|
|
* @return NS_FRAME_COMPLETE if all content has been mapped and 0 if we
|
|
* should be continued
|
|
*/
|
|
nsReflowStatus nsInlineFrame::ReflowUnmappedChildren(nsIPresContext* aPresContext,
|
|
nsInlineState& aState)
|
|
{
|
|
#ifdef NS_DEBUG
|
|
if (GetVerifyTreeEnable()) {
|
|
VerifyLastIsComplete();
|
|
}
|
|
#endif
|
|
nsIFrame* kidPrevInFlow = nsnull;
|
|
nsReflowStatus result = NS_FRAME_NOT_COMPLETE;
|
|
|
|
// If we have no children and we have a prev-in-flow then we need to pick
|
|
// up where it left off. If we have children, e.g. we're being resized, then
|
|
// our content offset should already be set correctly...
|
|
if ((nsnull == mFirstChild) && (nsnull != mPrevInFlow)) {
|
|
nsInlineFrame* prev = (nsInlineFrame*)mPrevInFlow;
|
|
NS_ASSERTION(prev->mLastContentOffset >= prev->mFirstContentOffset, "bad prevInFlow");
|
|
|
|
mFirstContentOffset = prev->NextChildOffset();
|
|
if (!prev->mLastContentIsComplete) {
|
|
// Our prev-in-flow's last child is not complete
|
|
prev->LastChild(kidPrevInFlow);
|
|
}
|
|
}
|
|
mLastContentIsComplete = PR_TRUE;
|
|
|
|
// Place our children, one at a time until we are out of children
|
|
nsSize kidMaxElementSize;
|
|
nsSize* pKidMaxElementSize = (nsnull != aState.maxElementSize) ? &kidMaxElementSize : nsnull;
|
|
PRInt32 kidIndex = NextChildOffset();
|
|
nsIFrame* prevKidFrame;
|
|
|
|
PRBool breakAfter = PR_FALSE;
|
|
LastChild(prevKidFrame);
|
|
for (;;) {
|
|
// Get the next content object
|
|
nsIContentPtr kid = mContent->ChildAt(kidIndex);
|
|
if (kid.IsNull()) {
|
|
result = NS_FRAME_COMPLETE;
|
|
break;
|
|
}
|
|
|
|
// Make sure we still have room left
|
|
if (aState.availSize.width <= 0) {
|
|
// Note: return status was set to 0 above...
|
|
break;
|
|
}
|
|
|
|
// Resolve style for the child
|
|
nsIStyleContextPtr kidStyleContext = aPresContext->ResolveStyleContextFor(kid, this);
|
|
|
|
// Figure out how we should treat the child
|
|
nsIFrame* kidFrame;
|
|
nsStyleDisplay* kidDisplay =
|
|
(nsStyleDisplay*)kidStyleContext->GetData(eStyleStruct_Display);
|
|
nsStylePosition* kidPosition = (nsStylePosition*)
|
|
kidStyleContext->GetData(eStyleStruct_Position);
|
|
|
|
// Check whether it wants to floated or absolutely positioned
|
|
nsresult rv;
|
|
if (NS_STYLE_POSITION_ABSOLUTE == kidPosition->mPosition) {
|
|
rv = AbsoluteFrame::NewFrame(&kidFrame, kid, this);
|
|
if (NS_OK == rv) {
|
|
kidFrame->SetStyleContext(aPresContext, kidStyleContext);
|
|
}
|
|
} else if (kidDisplay->mFloats != NS_STYLE_FLOAT_NONE) {
|
|
rv = PlaceholderFrame::NewFrame(&kidFrame, kid, this);
|
|
if (NS_OK == rv) {
|
|
kidFrame->SetStyleContext(aPresContext, kidStyleContext);
|
|
}
|
|
} else if (nsnull == kidPrevInFlow) {
|
|
nsIContentDelegatePtr kidDel;
|
|
switch (kidDisplay->mDisplay) {
|
|
case NS_STYLE_DISPLAY_BLOCK:
|
|
case NS_STYLE_DISPLAY_LIST_ITEM:
|
|
if (kidIndex != mFirstContentOffset) {
|
|
// We don't allow block elements to be placed in us anywhere
|
|
// other than at our left margin.
|
|
goto done;
|
|
}
|
|
// FALLTHROUGH
|
|
|
|
case NS_STYLE_DISPLAY_INLINE:
|
|
kidDel = kid->GetDelegate(aPresContext);
|
|
rv = kidDel->CreateFrame(aPresContext, kid, this,
|
|
kidStyleContext, kidFrame);
|
|
break;
|
|
|
|
default:
|
|
NS_ASSERTION(nsnull == kidPrevInFlow, "bad prev in flow");
|
|
rv = nsFrame::NewFrame(&kidFrame, kid, this);
|
|
if (NS_OK == rv) {
|
|
kidFrame->SetStyleContext(aPresContext, kidStyleContext);
|
|
}
|
|
break;
|
|
}
|
|
} else {
|
|
rv = kidPrevInFlow->CreateContinuingFrame(aPresContext, this,
|
|
kidStyleContext, kidFrame);
|
|
}
|
|
|
|
// Try to reflow the child into the available space. It might not
|
|
// fit or might need continuing.
|
|
nsReflowMetrics kidSize;
|
|
kidFrame->WillReflow(*aPresContext);
|
|
nsReflowStatus status = ReflowChild(kidFrame, aPresContext, kidSize,
|
|
aState.availSize, pKidMaxElementSize);
|
|
|
|
// Did the child fit?
|
|
if ((kidSize.width > aState.availSize.width) && (nsnull != mFirstChild)) {
|
|
// The child is too wide to fit in the available space, and it's
|
|
// not our first child. Add the frame to our overflow list
|
|
NS_ASSERTION(nsnull == mOverflowList, "bad overflow list");
|
|
mOverflowList = kidFrame;
|
|
prevKidFrame->SetNextSibling(nsnull);
|
|
break;
|
|
}
|
|
|
|
// Place and size the child. We'll deal with vertical alignment when
|
|
// we're all done
|
|
PlaceChild(kidFrame, mChildCount, aState, kidSize, pKidMaxElementSize);
|
|
|
|
// Link child frame into the list of children
|
|
if (nsnull != prevKidFrame) {
|
|
prevKidFrame->SetNextSibling(kidFrame);
|
|
} else {
|
|
mFirstChild = kidFrame; // our first child
|
|
SetFirstContentOffset(kidFrame);
|
|
}
|
|
prevKidFrame = kidFrame;
|
|
mChildCount++;
|
|
kidIndex++;
|
|
|
|
// Did the child complete?
|
|
if (NS_FRAME_IS_NOT_COMPLETE(status)) {
|
|
// If the child isn't complete then it means that we've used up
|
|
// all of our available space
|
|
mLastContentIsComplete = PR_FALSE;
|
|
break;
|
|
}
|
|
kidPrevInFlow = nsnull;
|
|
|
|
// If we need to break after the kidFrame, then do so now
|
|
if (breakAfter) {
|
|
break;
|
|
}
|
|
}
|
|
|
|
done:;
|
|
// Update the content mapping
|
|
NS_ASSERTION(IsLastChild(prevKidFrame), "bad last child");
|
|
SetLastContentOffset(prevKidFrame);
|
|
#ifdef NS_DEBUG
|
|
if (GetVerifyTreeEnable()) {
|
|
PRInt32 len = LengthOf(mFirstChild);
|
|
NS_ASSERTION(len == mChildCount, "bad child count");
|
|
VerifyLastIsComplete();
|
|
}
|
|
#endif
|
|
return result;
|
|
}
|
|
|
|
void
|
|
nsInlineFrame::InitializeState(nsIPresContext* aPresContext,
|
|
nsInlineState& aState)
|
|
{
|
|
PRIntn ss = aState.mStyleSizeFlags =
|
|
nsCSSLayout::GetStyleSize(aPresContext, this, aState.mStyleSize);
|
|
if (0 != (ss & NS_SIZE_HAS_WIDTH)) {
|
|
// When we are given a width, change the reflow behavior to
|
|
// unconstrained.
|
|
aState.unconstrainedWidth = PR_TRUE;
|
|
aState.availSize.width = NS_UNCONSTRAINEDSIZE;
|
|
}
|
|
}
|
|
|
|
NS_METHOD nsInlineFrame::ResizeReflow(nsIPresContext* aPresContext,
|
|
nsReflowMetrics& aDesiredSize,
|
|
const nsSize& aMaxSize,
|
|
nsSize* aMaxElementSize,
|
|
nsReflowStatus& aStatus)
|
|
{
|
|
NS_FRAME_TRACE_REFLOW_IN("nsInlineFrame::ResizeReflow");
|
|
#ifdef NS_DEBUG
|
|
if (GetVerifyTreeEnable()) {
|
|
PreReflowCheck();
|
|
}
|
|
#endif
|
|
|
|
//XXX not now NS_PRECONDITION((aMaxSize.width > 0) && (aMaxSize.height > 0), "unexpected max size");
|
|
|
|
PRBool reflowMappedOK = PR_TRUE;
|
|
|
|
aStatus = NS_FRAME_COMPLETE; // initialize out parameter
|
|
|
|
// Get the style molecule
|
|
nsStyleFont* styleFont = (nsStyleFont*)
|
|
mStyleContext->GetData(eStyleStruct_Font);
|
|
nsStyleSpacing* styleSpacing = (nsStyleSpacing*)
|
|
mStyleContext->GetData(eStyleStruct_Spacing);
|
|
|
|
// Check for an overflow list
|
|
MoveOverflowToChildList();
|
|
|
|
// Initialize our reflow state. We must wait until after we've processed
|
|
// the overflow list, because our first content offset might change
|
|
nsMargin borderPadding;
|
|
styleSpacing->CalcBorderPaddingFor(this, borderPadding);
|
|
nsInlineState state(styleFont, borderPadding, aMaxSize, aMaxElementSize);
|
|
InitializeState(aPresContext, state);
|
|
state.SetNumAscents(mContent->ChildCount() - mFirstContentOffset);
|
|
|
|
// Reflow any existing frames
|
|
if (nsnull != mFirstChild) {
|
|
reflowMappedOK = ReflowMappedChildrenFrom(aPresContext, state, mFirstChild, 0);
|
|
|
|
if (PR_FALSE == reflowMappedOK) {
|
|
// We didn't successfully reflow our mapped frames; therefore, we're not complete
|
|
aStatus = NS_FRAME_NOT_COMPLETE;
|
|
}
|
|
}
|
|
|
|
// Did we successfully relow our mapped children?
|
|
if (PR_TRUE == reflowMappedOK) {
|
|
// Any space left?
|
|
if (state.availSize.width <= 0) {
|
|
// No space left. Don't try to pull-up children or reflow unmapped
|
|
if (NextChildOffset() < mContent->ChildCount()) {
|
|
// No room left to map the remaining content; therefore, we're not complete
|
|
aStatus = NS_FRAME_NOT_COMPLETE;
|
|
}
|
|
} else if (NextChildOffset() < mContent->ChildCount()) {
|
|
// Try and pull-up some children from a next-in-flow
|
|
if (PullUpChildren(aPresContext, state)) {
|
|
// If we still have unmapped children then create some new frames
|
|
if (NextChildOffset() < mContent->ChildCount()) {
|
|
aStatus = ReflowUnmappedChildren(aPresContext, state);
|
|
}
|
|
} else {
|
|
// We were unable to pull-up all the existing frames from the next in flow;
|
|
// therefore, we're not complete
|
|
aStatus = NS_FRAME_NOT_COMPLETE;
|
|
}
|
|
}
|
|
}
|
|
|
|
// Vertically align the children
|
|
nscoord lineHeight =
|
|
nsCSSLayout::VerticallyAlignChildren(aPresContext, this, styleFont,
|
|
borderPadding.top,
|
|
mFirstChild, mChildCount,
|
|
state.ascents, state.maxAscent);
|
|
|
|
ComputeFinalSize(aPresContext, state, aDesiredSize);
|
|
|
|
#if 0
|
|
// XXX I don't think our return size properly accounts for the lineHeight
|
|
// (which may not == state.maxAscent + state.maxDescent)
|
|
// Return our size and our status
|
|
#endif
|
|
|
|
#ifdef NS_DEBUG
|
|
if (GetVerifyTreeEnable()) {
|
|
PostReflowCheck(aStatus);
|
|
}
|
|
#endif
|
|
NS_FRAME_TRACE_REFLOW_OUT("nsInlineFrame::ResizeReflow", aStatus);
|
|
return NS_OK;
|
|
}
|
|
|
|
void
|
|
nsInlineFrame::ComputeFinalSize(nsIPresContext* aPresContext,
|
|
nsInlineState& aState,
|
|
nsReflowMetrics& aDesiredSize)
|
|
{
|
|
// Compute default size
|
|
aDesiredSize.width = aState.x + aState.borderPadding.right;
|
|
aDesiredSize.ascent = aState.borderPadding.top + aState.maxAscent;
|
|
aDesiredSize.descent = aState.maxDescent + aState.borderPadding.bottom;
|
|
aDesiredSize.height = aDesiredSize.ascent + aDesiredSize.descent;
|
|
|
|
// Apply width/height style properties
|
|
PRIntn ss = aState.mStyleSizeFlags;
|
|
if (0 != (ss & NS_SIZE_HAS_WIDTH)) {
|
|
aDesiredSize.width = aState.borderPadding.left + aState.mStyleSize.width +
|
|
aState.borderPadding.right;
|
|
}
|
|
if (0 != (ss & NS_SIZE_HAS_HEIGHT)) {
|
|
aDesiredSize.height = aState.borderPadding.top + aState.mStyleSize.height +
|
|
aState.borderPadding.bottom;
|
|
}
|
|
}
|
|
|
|
/////////////////////////////////////////////////////////////////////////////
|
|
|
|
PRIntn nsInlineFrame::GetSkipSides() const
|
|
{
|
|
PRIntn skip = 0;
|
|
if (nsnull != mPrevInFlow) {
|
|
skip |= 1 << NS_SIDE_LEFT;
|
|
}
|
|
if (nsnull != mNextInFlow) {
|
|
skip |= 1 << NS_SIDE_RIGHT;
|
|
}
|
|
return skip;
|
|
}
|
|
|
|
/////////////////////////////////////////////////////////////////////////////
|
|
|
|
// Incremental reflow support
|
|
|
|
NS_METHOD nsInlineFrame::GetReflowMetrics(nsIPresContext* aPresContext,
|
|
nsReflowMetrics& aMetrics)
|
|
{
|
|
nscoord maxAscent = 0;
|
|
nscoord maxDescent = 0;
|
|
nsIFrame* kid = mFirstChild;
|
|
while (nsnull != kid) {
|
|
nsReflowMetrics kidMetrics;
|
|
kid->GetReflowMetrics(aPresContext, kidMetrics);
|
|
if (kidMetrics.ascent > maxAscent) maxAscent = kidMetrics.ascent;
|
|
if (kidMetrics.descent > maxDescent) maxDescent = kidMetrics.descent;
|
|
kid->GetNextSibling(kid);
|
|
}
|
|
|
|
// XXX what about border & padding
|
|
aMetrics.width = mRect.width;
|
|
aMetrics.height = mRect.height;
|
|
aMetrics.ascent = maxAscent;
|
|
aMetrics.descent = maxDescent;
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
/**
|
|
* Setup aState to the state it would have had we just reflowed our
|
|
* children up to, but not including, aSkipChild. Return the index
|
|
* of aSkipChild in our list of children.
|
|
* If aSkipChild is nsnull then resets the state for appended content.
|
|
*/
|
|
PRInt32 nsInlineFrame::RecoverState(nsIPresContext* aPresContext,
|
|
nsInlineState& aState,
|
|
nsIFrame* aSkipChild)
|
|
{
|
|
// Get ascent & descent info for all the children up to but not
|
|
// including aSkipChild. Also compute the x coordinate for where
|
|
// aSkipChild will be place after it is reflowed.
|
|
PRInt32 i = 0;
|
|
nsIFrame* kid = mFirstChild;
|
|
nscoord x = aState.x;
|
|
nscoord maxAscent = 0;
|
|
nscoord maxDescent = 0;
|
|
while ((nsnull != kid) && (kid != aSkipChild)) {
|
|
nsReflowMetrics kidMetrics;
|
|
kid->GetReflowMetrics(aPresContext, kidMetrics);
|
|
aState.ascents[i] = kidMetrics.ascent;
|
|
if (kidMetrics.ascent > maxAscent) maxAscent = kidMetrics.ascent;
|
|
if (kidMetrics.descent > maxDescent) maxDescent = kidMetrics.descent;
|
|
|
|
// XXX Factor in left and right margins
|
|
x += kidMetrics.width;
|
|
|
|
kid->GetNextSibling(kid);
|
|
i++;
|
|
}
|
|
aState.maxAscent = maxAscent;
|
|
aState.maxDescent = maxDescent;
|
|
aState.x = x;
|
|
return i;
|
|
}
|
|
|
|
// XXX We need to return information about whether our next-in-flow is
|
|
// dirty...
|
|
nsReflowStatus
|
|
nsInlineFrame::IncrementalReflowFrom(nsIPresContext* aPresContext,
|
|
nsInlineState& aState,
|
|
nsIFrame* aChildFrame,
|
|
PRInt32 aChildIndex)
|
|
{
|
|
nsReflowStatus status = NS_FRAME_COMPLETE;
|
|
|
|
// Just reflow all the mapped children starting with childFrame.
|
|
// XXX This isn't the optimal thing to do...
|
|
if (ReflowMappedChildrenFrom(aPresContext, aState, aChildFrame, aChildIndex)) {
|
|
if (NextChildOffset() < mContent->ChildCount()) {
|
|
// Any space left?
|
|
if (aState.availSize.width <= 0) {
|
|
// No space left. Don't try to pull-up children
|
|
status = NS_FRAME_NOT_COMPLETE;
|
|
} else {
|
|
// Try and pull-up some children from a next-in-flow
|
|
if (!PullUpChildren(aPresContext, aState)) {
|
|
// We were not able to pull-up all the child frames from our
|
|
// next-in-flow
|
|
status = NS_FRAME_NOT_COMPLETE;
|
|
}
|
|
}
|
|
}
|
|
} else {
|
|
// We were unable to reflow all our mapped frames
|
|
status = NS_FRAME_NOT_COMPLETE;
|
|
}
|
|
|
|
return status;
|
|
}
|
|
|
|
nsReflowStatus
|
|
nsInlineFrame::IncrementalReflowAfter(nsIPresContext* aPresContext,
|
|
nsInlineState& aState,
|
|
nsIFrame* aChildFrame,
|
|
PRInt32 aChildIndex)
|
|
{
|
|
nsReflowStatus status = NS_FRAME_COMPLETE;
|
|
nsIFrame* nextFrame;
|
|
|
|
aChildFrame->GetNextSibling(nextFrame);
|
|
|
|
// Just reflow all the remaining mapped children
|
|
// XXX This isn't the optimal thing to do...
|
|
if ((nsnull == nextFrame) ||
|
|
ReflowMappedChildrenFrom(aPresContext, aState, nextFrame, aChildIndex + 1)) {
|
|
if (NextChildOffset() < mContent->ChildCount()) {
|
|
// Any space left?
|
|
if (aState.availSize.width <= 0) {
|
|
// No space left. Don't try to pull-up children
|
|
status = NS_FRAME_NOT_COMPLETE;
|
|
} else {
|
|
// Try and pull-up some children from a next-in-flow
|
|
if (!PullUpChildren(aPresContext, aState)) {
|
|
// We were not able to pull-up all the child frames from our
|
|
// next-in-flow
|
|
status = NS_FRAME_NOT_COMPLETE;
|
|
}
|
|
}
|
|
}
|
|
} else {
|
|
// We were unable to reflow all our mapped frames
|
|
status = NS_FRAME_NOT_COMPLETE;
|
|
}
|
|
|
|
return status;
|
|
}
|
|
|
|
NS_METHOD nsInlineFrame::IncrementalReflow(nsIPresContext* aPresContext,
|
|
nsReflowMetrics& aDesiredSize,
|
|
const nsSize& aMaxSize,
|
|
nsReflowCommand& aReflowCommand,
|
|
nsReflowStatus& aStatus)
|
|
{
|
|
NS_FRAME_TRACE_REFLOW_IN("nsInlineFrame::IncrementalReflow");
|
|
|
|
aStatus = NS_FRAME_COMPLETE; // initialize out parameter
|
|
|
|
// Get the style molecule
|
|
nsStyleFont* styleFont =
|
|
(nsStyleFont*)mStyleContext->GetData(eStyleStruct_Font);
|
|
nsStyleSpacing* styleSpacing =
|
|
(nsStyleSpacing*)mStyleContext->GetData(eStyleStruct_Spacing);
|
|
|
|
nscoord lineHeight;
|
|
PRInt32 kidIndex;
|
|
|
|
nsMargin borderPadding;
|
|
styleSpacing->CalcBorderPaddingFor(this, borderPadding);
|
|
nsInlineState state(styleFont, borderPadding, aMaxSize, nsnull);
|
|
InitializeState(aPresContext, state);
|
|
state.SetNumAscents(mContent->ChildCount() - mFirstContentOffset);
|
|
|
|
if (aReflowCommand.GetTarget() == this) {
|
|
switch (aReflowCommand.GetType()) {
|
|
case nsReflowCommand::FrameAppended:
|
|
// Recover our state
|
|
RecoverState(aPresContext, state, nsnull);
|
|
aStatus = ReflowUnmappedChildren(aPresContext, state);
|
|
|
|
// Vertically align the children
|
|
lineHeight = nsCSSLayout::VerticallyAlignChildren(aPresContext, this,
|
|
styleFont, borderPadding.top, mFirstChild,
|
|
mChildCount, state.ascents, state.maxAscent);
|
|
|
|
ComputeFinalSize(aPresContext, state, aDesiredSize);
|
|
break;
|
|
|
|
#if 0
|
|
case nsReflowCommand::ContentChanged:
|
|
// Recover our state
|
|
kidFrame = aReflowCommand.GetChildFrame();
|
|
kidIndex = RecoverState(aPresContext, state, kidFrame);
|
|
aStatus = IncrementalReflowFrom(aPresContext, state, kidFrame, kidIndex);
|
|
|
|
// Vertically align the children
|
|
lineHeight = nsCSSLayout::VerticallyAlignChildren(aPresContext, this,
|
|
styleFont, borderPadding.top, mFirstChild,
|
|
mChildCount, state.ascents, state.maxAscent);
|
|
|
|
ComputeFinalSize(aPresContext, state, aDesiredSize);
|
|
break;
|
|
#endif
|
|
|
|
default:
|
|
NS_NOTYETIMPLEMENTED("unexpected reflow command");
|
|
break;
|
|
}
|
|
|
|
} else {
|
|
// The command is passing through us. Get the next frame in the reflow chain
|
|
nsIFrame* kidFrame = aReflowCommand.GetNext();
|
|
nsReflowMetrics kidSize;
|
|
|
|
// Restore our state as if nextFrame is the next frame to reflow
|
|
kidIndex = RecoverState(aPresContext, state, kidFrame);
|
|
|
|
// Reflow the child into the available space
|
|
aStatus = aReflowCommand.Next(kidSize, state.availSize, kidFrame);
|
|
|
|
// Did the child fit?
|
|
if ((kidSize.width > state.availSize.width) && (kidFrame != mFirstChild)) {
|
|
nsIFrame* prevFrame;
|
|
|
|
// The child is too wide to fit in the available space, and it's not our
|
|
// first child
|
|
PrevChild(kidFrame, prevFrame);
|
|
PushChildren(kidFrame, prevFrame, mLastContentIsComplete);
|
|
SetLastContentOffset(prevFrame);
|
|
mChildCount = kidIndex - 1;
|
|
aStatus = NS_FRAME_NOT_COMPLETE;
|
|
|
|
} else {
|
|
// Place and size the child
|
|
PlaceChild(kidFrame, kidIndex, state, kidSize, nsnull);
|
|
|
|
nsIFrame* kidNextInFlow;
|
|
kidFrame->GetNextInFlow(kidNextInFlow);
|
|
|
|
// Is the child complete?
|
|
if (NS_FRAME_IS_COMPLETE(aStatus)) {
|
|
// Check whether the frame has next-in-flow(s) that are no longer needed
|
|
if (nsnull != kidNextInFlow) {
|
|
// Remove the next-in-flow(s)
|
|
DeleteChildsNextInFlow(kidFrame);
|
|
}
|
|
|
|
// Adjust the frames that follow
|
|
aStatus = IncrementalReflowAfter(aPresContext, state, kidFrame, kidIndex);
|
|
|
|
} else {
|
|
nsIFrame* nextSibling;
|
|
|
|
// No, the child isn't complete
|
|
if (nsnull == kidNextInFlow) {
|
|
// The child doesn't have a next-in-flow so create a continuing
|
|
// frame.
|
|
nsIFrame* continuingFrame;
|
|
|
|
nsIStyleContextPtr kidSC;
|
|
kidFrame->GetStyleContext(aPresContext, kidSC.AssignRef());
|
|
kidFrame->CreateContinuingFrame(aPresContext, this, kidSC, continuingFrame);
|
|
|
|
// Link the child into the sibling list
|
|
kidFrame->GetNextSibling(nextSibling);
|
|
continuingFrame->SetNextSibling(nextSibling);
|
|
kidFrame->SetNextSibling(continuingFrame);
|
|
}
|
|
|
|
// We've used up all of our available space, so push the remaining
|
|
// children to the next-in-flow
|
|
kidFrame->GetNextSibling(nextSibling);
|
|
if (nsnull != nextSibling) {
|
|
PushChildren(nextSibling, kidFrame, mLastContentIsComplete);
|
|
}
|
|
|
|
SetLastContentOffset(kidFrame);
|
|
mChildCount = kidIndex;
|
|
}
|
|
}
|
|
|
|
// Vertically align the children
|
|
lineHeight = nsCSSLayout::VerticallyAlignChildren(aPresContext, this,
|
|
styleFont, borderPadding.top, mFirstChild,
|
|
mChildCount, state.ascents, state.maxAscent);
|
|
|
|
ComputeFinalSize(aPresContext, state, aDesiredSize);
|
|
}
|
|
|
|
NS_FRAME_TRACE_REFLOW_OUT("nsInlineFrame::IncrementalReflow", aStatus);
|
|
return NS_OK;
|
|
}
|
|
|
|
|
|
// In order to execute the vertical alignment code after incremental
|
|
// reflow of the inline frame, we need to reposition any child frames
|
|
// that were relatively positioned back to their computed x origin.
|
|
// This should probably be done as a pre-alignment computation (and it
|
|
// can be avoided if there are no relatively positioned children).
|
|
|
|
/**
|
|
* Adjust the position of all the children in this frame.
|
|
*
|
|
* The children after aKid in the list of children are slid over by
|
|
* dx.
|
|
*
|
|
* Once the x and y coordinates have been set, then the vertical
|
|
* alignment code is executed to place the children vertically and to
|
|
* compute the final height of our frame.
|
|
*
|
|
* If one of our children spills over the end then push it to the
|
|
* next-in-flow or to our overflow list.
|
|
*/
|
|
#if 0
|
|
nsReflowStatus
|
|
nsInlineFrame::AdjustChildren(nsIPresContext* aPresContext,
|
|
nsReflowMetrics& aDesiredSize,
|
|
nsInlineState& aState,
|
|
nsIFrame* aKid,
|
|
nsReflowMetrics& aKidMetrics,
|
|
ReflowStatus aKidReflowStatus)
|
|
{
|
|
nscoord xr = aState.availSize.width + aState.borderPadding.left;
|
|
nscoord remainingSpace = xr - aState.x;
|
|
nscoord x = aState.x;
|
|
|
|
// Slide all of the children over following aKid
|
|
nsIFrame* kid = aKid;
|
|
nsRect r;
|
|
while (nsnull != kid) {
|
|
kid->GetRect(r);
|
|
if (r.x != x) {
|
|
kid->MoveTo(x, r.y);
|
|
}
|
|
x += r.width;
|
|
// XXX factor in left and right margins
|
|
kid->GetNextSibling(kid);
|
|
}
|
|
|
|
// Vertically align the children
|
|
const nsMargin& insets = aState.borderPadding;
|
|
nsCSSLayout::VerticallyAlignChildren(aPresContext, this, aState.font,
|
|
insets.top, mFirstChild, mChildCount,
|
|
aState.ascents, aState.maxAscent);
|
|
|
|
// XXX relative position children, if any
|
|
|
|
// XXX adjust mLastContentOffset if we push
|
|
// XXX if we push, generate a reflow command
|
|
|
|
return NS_FRAME_COMPLETE;
|
|
}
|
|
#endif
|