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454 lines
14 KiB
C++
454 lines
14 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 "nsAreaFrame.h"
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#include "nsBlockBandData.h"
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#include "nsIReflowCommand.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 "nsIViewManager.h"
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#include "nsSpaceManager.h"
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#include "nsHTMLAtoms.h"
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#include "nsIView.h"
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#include "nsHTMLIIDs.h"
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#include "nsHTMLValue.h"
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#include "nsHTMLParts.h"
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#include "nsLayoutAtoms.h"
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#undef NOISY_MAX_ELEMENT_SIZE
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static NS_DEFINE_IID(kAreaFrameIID, NS_IAREAFRAME_IID);
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nsresult
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NS_NewAreaFrame(nsIFrame** aNewFrame, PRUint32 aFlags)
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{
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NS_PRECONDITION(aNewFrame, "null OUT ptr");
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if (nsnull == aNewFrame) {
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return NS_ERROR_NULL_POINTER;
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}
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nsAreaFrame* it = new nsAreaFrame;
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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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it->SetFlags(aFlags);
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*aNewFrame = it;
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return NS_OK;
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}
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nsAreaFrame::nsAreaFrame()
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{
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}
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nsAreaFrame::~nsAreaFrame()
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{
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NS_IF_RELEASE(mSpaceManager);
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}
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/////////////////////////////////////////////////////////////////////////////
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// nsISupports
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NS_IMETHODIMP
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nsAreaFrame::QueryInterface(const nsIID& aIID, void** aInstancePtr)
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{
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if (NULL == aInstancePtr) {
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return NS_ERROR_NULL_POINTER;
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}
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if (aIID.Equals(kAreaFrameIID)) {
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nsIAreaFrame* tmp = (nsIAreaFrame*)this;
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*aInstancePtr = (void*)tmp;
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return NS_OK;
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}
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return nsBlockFrame::QueryInterface(aIID, aInstancePtr);
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}
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/////////////////////////////////////////////////////////////////////////////
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// nsIFrame
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NS_IMETHODIMP
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nsAreaFrame::Init(nsIPresContext& aPresContext,
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nsIContent* aContent,
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nsIFrame* aParent,
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nsIStyleContext* aContext,
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nsIFrame* aPrevInFlow)
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{
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nsresult rv;
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// Let the block frame do its initialization
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rv = nsBlockFrame::Init(aPresContext, aContent, aParent, aContext, aPrevInFlow);
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// Create a space manager if requested
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if (0 == (mFlags & NS_AREA_NO_SPACE_MGR)) {
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mSpaceManager = new nsSpaceManager(this);
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if (!mSpaceManager) {
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return NS_ERROR_OUT_OF_MEMORY;
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}
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NS_ADDREF(mSpaceManager);
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}
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return rv;
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}
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NS_IMETHODIMP
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nsAreaFrame::Destroy(nsIPresContext& aPresContext)
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{
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mAbsoluteContainer.DestroyFrames(this, aPresContext);
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return nsBlockFrame::Destroy(aPresContext);
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}
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NS_IMETHODIMP
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nsAreaFrame::SetInitialChildList(nsIPresContext& aPresContext,
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nsIAtom* aListName,
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nsIFrame* aChildList)
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{
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nsresult rv;
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if (nsLayoutAtoms::absoluteList == aListName) {
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rv = mAbsoluteContainer.SetInitialChildList(this, aPresContext, aListName, aChildList);
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} else {
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rv = nsBlockFrame::SetInitialChildList(aPresContext, aListName, aChildList);
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}
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return rv;
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}
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NS_IMETHODIMP
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nsAreaFrame::AppendFrames(nsIPresContext& aPresContext,
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nsIPresShell& aPresShell,
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nsIAtom* aListName,
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nsIFrame* aFrameList)
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{
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nsresult rv;
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if (nsLayoutAtoms::absoluteList == aListName) {
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rv = mAbsoluteContainer.AppendFrames(this, aPresContext, aPresShell, aListName,
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aFrameList);
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} else {
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rv = nsBlockFrame::AppendFrames(aPresContext, aPresShell, aListName,
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aFrameList);
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}
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return rv;
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}
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NS_IMETHODIMP
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nsAreaFrame::InsertFrames(nsIPresContext& aPresContext,
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nsIPresShell& aPresShell,
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nsIAtom* aListName,
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nsIFrame* aPrevFrame,
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nsIFrame* aFrameList)
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{
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nsresult rv;
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if (nsLayoutAtoms::absoluteList == aListName) {
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rv = mAbsoluteContainer.InsertFrames(this, aPresContext, aPresShell, aListName,
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aPrevFrame, aFrameList);
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} else {
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rv = nsBlockFrame::InsertFrames(aPresContext, aPresShell, aListName,
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aPrevFrame, aFrameList);
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}
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return rv;
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}
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NS_IMETHODIMP
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nsAreaFrame::RemoveFrame(nsIPresContext& aPresContext,
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nsIPresShell& aPresShell,
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nsIAtom* aListName,
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nsIFrame* aOldFrame)
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{
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nsresult rv;
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if (nsLayoutAtoms::absoluteList == aListName) {
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rv = mAbsoluteContainer.RemoveFrame(this, aPresContext, aPresShell, aListName, aOldFrame);
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} else {
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rv = nsBlockFrame::RemoveFrame(aPresContext, aPresShell, aListName, aOldFrame);
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}
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return rv;
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}
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NS_IMETHODIMP
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nsAreaFrame::GetAdditionalChildListName(PRInt32 aIndex,
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nsIAtom** aListName) const
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{
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NS_PRECONDITION(nsnull != aListName, "null OUT parameter pointer");
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if (aIndex <= NS_BLOCK_FRAME_LAST_LIST_INDEX) {
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return nsBlockFrame::GetAdditionalChildListName(aIndex, aListName);
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}
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*aListName = nsnull;
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if (NS_AREA_FRAME_ABSOLUTE_LIST_INDEX == aIndex) {
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*aListName = nsLayoutAtoms::absoluteList;
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NS_ADDREF(*aListName);
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}
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return NS_OK;
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}
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NS_IMETHODIMP
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nsAreaFrame::FirstChild(nsIAtom* aListName, nsIFrame** aFirstChild) const
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{
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NS_PRECONDITION(nsnull != aFirstChild, "null OUT parameter pointer");
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if (aListName == nsLayoutAtoms::absoluteList) {
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return mAbsoluteContainer.FirstChild(this, aListName, aFirstChild);
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}
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return nsBlockFrame::FirstChild(aListName, aFirstChild);
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}
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#ifdef NS_DEBUG
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NS_IMETHODIMP
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nsAreaFrame::Paint(nsIPresContext& aPresContext,
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nsIRenderingContext& aRenderingContext,
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const nsRect& aDirtyRect,
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nsFramePaintLayer aWhichLayer)
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{
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// Note: all absolutely positioned elements have views so we don't
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// need to worry about painting them
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nsresult rv = nsBlockFrame::Paint(aPresContext, aRenderingContext,
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aDirtyRect, aWhichLayer);
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if ((NS_FRAME_PAINT_LAYER_DEBUG == aWhichLayer) && GetShowFrameBorders()) {
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// Render the bands in the spacemanager
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nsISpaceManager* sm = mSpaceManager;
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if (nsnull != sm) {
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nsBlockBandData band;
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band.Init(sm, nsSize(mRect.width, mRect.height));
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nscoord y = 0;
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while (y < mRect.height) {
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nsRect availArea;
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band.GetAvailableSpace(y, availArea);
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// Render a box and a diagonal line through the band
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aRenderingContext.SetColor(NS_RGB(0,255,0));
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aRenderingContext.DrawRect(0, availArea.y,
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mRect.width, availArea.height);
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aRenderingContext.DrawLine(0, availArea.y,
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mRect.width, availArea.YMost());
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// Render boxes and opposite diagonal lines around the
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// unavailable parts of the band.
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PRInt32 i;
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for (i = 0; i < band.GetTrapezoidCount(); i++) {
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const nsBandTrapezoid* trapezoid = band.GetTrapezoid(i);
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if (nsBandTrapezoid::Available != trapezoid->mState) {
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nsRect r;
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trapezoid->GetRect(r);
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if (nsBandTrapezoid::OccupiedMultiple == trapezoid->mState) {
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aRenderingContext.SetColor(NS_RGB(0,255,128));
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}
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else {
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aRenderingContext.SetColor(NS_RGB(128,255,0));
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}
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aRenderingContext.DrawRect(r);
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aRenderingContext.DrawLine(r.x, r.YMost(), r.XMost(), r.y);
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}
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}
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y = availArea.YMost();
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}
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}
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}
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return rv;
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}
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#endif
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// Return the x-most and y-most for the child absolutely positioned
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// elements
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NS_IMETHODIMP
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nsAreaFrame::GetPositionedInfo(nscoord& aXMost, nscoord& aYMost) const
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{
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nsresult rv = mAbsoluteContainer.GetPositionedInfo(this, aXMost, aYMost);
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// If we have child frames that stick outside of our box, and they should
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// be visible, then include them too so the total size is correct
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if (mState & NS_FRAME_OUTSIDE_CHILDREN) {
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const nsStyleDisplay* display = (const nsStyleDisplay*)
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mStyleContext->GetStyleData(eStyleStruct_Display);
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if (NS_STYLE_OVERFLOW_VISIBLE == display->mOverflow) {
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if (mCombinedArea.XMost() > aXMost) {
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aXMost = mCombinedArea.XMost();
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}
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if (mCombinedArea.YMost() > aYMost) {
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aYMost = mCombinedArea.YMost();
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}
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}
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}
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return rv;
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}
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NS_IMETHODIMP
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nsAreaFrame::Reflow(nsIPresContext& aPresContext,
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nsHTMLReflowMetrics& aDesiredSize,
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const nsHTMLReflowState& aReflowState,
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nsReflowStatus& aStatus)
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{
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NS_FRAME_TRACE(NS_FRAME_TRACE_CALLS,
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("enter nsAreaFrame::Reflow: maxSize=%d,%d reason=%d",
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aReflowState.availableWidth,
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aReflowState.availableHeight,
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aReflowState.reason));
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nsresult rv = NS_OK;
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// See if it's an incremental reflow command
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if (eReflowReason_Incremental == aReflowState.reason) {
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// Give the absolute positioning code a chance to handle it
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PRBool handled;
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mAbsoluteContainer.IncrementalReflow(this, aPresContext, aReflowState, handled);
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// If the incremental reflow command was handled by the absolute positioning
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// code, then we're all done
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if (handled) {
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// Just return our current size as our desired size
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aDesiredSize.width = mRect.width;
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aDesiredSize.height = mRect.height;
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aDesiredSize.ascent = mRect.height;
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aDesiredSize.descent = 0;
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// Whether or not we're complete hasn't changed
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aStatus = (nsnull != mNextInFlow) ? NS_FRAME_NOT_COMPLETE : NS_FRAME_COMPLETE;
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return rv;
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}
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}
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// If we have a space manager, then set it in the reflow state
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if (nsnull != mSpaceManager) {
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// Modify the existing reflow state
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nsHTMLReflowState& reflowState = (nsHTMLReflowState&)aReflowState;
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reflowState.mSpaceManager = mSpaceManager;
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// Clear the spacemanager's regions.
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mSpaceManager->ClearRegions();
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}
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// Let the block frame do its reflow first
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rv = nsBlockFrame::Reflow(aPresContext, aDesiredSize, aReflowState, aStatus);
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// Let the absolutely positioned container reflow any absolutely positioned
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// child frames that need to be reflowed, e.g., elements with a percentage
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// based width/height
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if (NS_SUCCEEDED(rv)) {
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rv = mAbsoluteContainer.Reflow(this, aPresContext, aReflowState);
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}
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if (mFlags & NS_AREA_WRAP_SIZE) {
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// When the area frame is supposed to wrap around all in-flow
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// children, make sure its big enough to include those that stick
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// outside the box.
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if (NS_FRAME_OUTSIDE_CHILDREN & mState) {
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nscoord xMost = aDesiredSize.mCombinedArea.XMost();
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if (xMost > aDesiredSize.width) {
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aDesiredSize.width = xMost;
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}
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nscoord yMost = aDesiredSize.mCombinedArea.YMost();
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if (yMost > aDesiredSize.height) {
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aDesiredSize.height = yMost;
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}
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}
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}
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#ifdef NOISY_MAX_ELEMENT_SIZE
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ListTag(stdout);
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printf(": maxElementSize=%d,%d desiredSize=%d,%d\n",
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aDesiredSize.maxElementSize ? aDesiredSize.maxElementSize->width : 0,
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aDesiredSize.maxElementSize ? aDesiredSize.maxElementSize->height : 0,
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aDesiredSize.width, aDesiredSize.height);
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#endif
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// If we have children that stick outside our box, then remember the
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// combined area, because we'll need it later when sizing our view
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if (mState & NS_FRAME_OUTSIDE_CHILDREN) {
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mCombinedArea = aDesiredSize.mCombinedArea;
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}
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return rv;
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}
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NS_IMETHODIMP
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nsAreaFrame::GetFrameType(nsIAtom** aType) const
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{
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NS_PRECONDITION(nsnull != aType, "null OUT parameter pointer");
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*aType = nsLayoutAtoms::areaFrame;
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NS_ADDREF(*aType);
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return NS_OK;
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}
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NS_IMETHODIMP
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nsAreaFrame::DidReflow(nsIPresContext& aPresContext,
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nsDidReflowStatus aStatus)
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{
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if (NS_FRAME_REFLOW_FINISHED == aStatus) {
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// If we should position our view, and we have child frames that stick
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// outside our box, then we need to size our view large enough to include
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// those child frames
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if ((mState & NS_FRAME_SYNC_FRAME_AND_VIEW) &&
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(mState & NS_FRAME_OUTSIDE_CHILDREN)) {
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nsIView* view;
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const nsStyleDisplay* display = (const nsStyleDisplay*)
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mStyleContext->GetStyleData(eStyleStruct_Display);
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GetView(&view);
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if (view && (NS_STYLE_OVERFLOW_VISIBLE == display->mOverflow)) {
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// Don't let our base class position the view since we're doing it
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mState &= ~NS_FRAME_SYNC_FRAME_AND_VIEW;
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// Set the view's bit that indicates that it has transparent content
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nsIViewManager* vm;
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view->GetViewManager(vm);
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vm->SetViewContentTransparency(view, PR_TRUE);
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// Position and size view relative to its parent, not relative to our
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// parent frame (our parent frame may not have a view).
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nsIView* parentWithView;
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nsPoint origin;
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// XXX We need to handle the case where child frames stick out on the
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// left and top edges as well...
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GetOffsetFromView(origin, &parentWithView);
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vm->ResizeView(view, mCombinedArea.XMost(), mCombinedArea.YMost());
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vm->MoveViewTo(view, origin.x, origin.y);
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NS_RELEASE(vm);
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// Call our base class
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nsresult rv = nsBlockFrame::DidReflow(aPresContext, aStatus);
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// Set the flag again...
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mState |= NS_FRAME_SYNC_FRAME_AND_VIEW;
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return rv;
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}
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}
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}
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return nsBlockFrame::DidReflow(aPresContext, aStatus);
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}
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/////////////////////////////////////////////////////////////////////////////
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// Diagnostics
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NS_IMETHODIMP
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nsAreaFrame::GetFrameName(nsString& aResult) const
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{
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return MakeFrameName("Area", aResult);
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}
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