зеркало из https://github.com/mozilla/pjs.git
788 строки
26 KiB
C++
788 строки
26 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 "nsIContent.h"
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#include "nsIHTMLContent.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 "nsIPresShell.h"
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#include "nsIViewManager.h"
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#include "nsIDeviceContext.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 "nsViewsCID.h"
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#include "nsHTMLIIDs.h"
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#include "nsIWebShell.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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static NS_DEFINE_IID(kIWebShellIID, NS_IWEB_SHELL_IID);
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static NS_DEFINE_IID(kAreaFrameIID, NS_IAREAFRAME_IID);
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nsresult
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NS_NewAreaFrame(nsIFrame*& aResult, PRUint32 aFlags)
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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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aResult = 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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mState &= ~NS_FRAME_SYNC_FRAME_AND_VIEW; // let us handle it
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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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{
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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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NS_ADDREF(mSpaceManager);
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}
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return nsBlockFrame::Init(aPresContext, aContent, aParent, aContext);
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}
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NS_IMETHODIMP
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nsAreaFrame::DeleteFrame(nsIPresContext& aPresContext)
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{
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mAbsoluteFrames.DeleteFrames(aPresContext);
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return nsBlockFrame::DeleteFrame(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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mAbsoluteFrames.SetFrames(aChildList);
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rv = NS_OK;
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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::GetAdditionalChildListName(PRInt32 aIndex,
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nsIAtom*& aListName) const
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{
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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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nsIAtom* atom = nsnull;
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if (NS_AREA_FRAME_ABSOLUTE_LIST_INDEX == aIndex) {
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atom = nsLayoutAtoms::absoluteList;
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NS_ADDREF(atom);
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}
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aListName = atom;
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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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if (aListName == nsLayoutAtoms::absoluteList) {
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aFirstChild = mAbsoluteFrames.FirstChild();
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return NS_OK;
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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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void
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nsAreaFrame::BandData::ComputeAvailSpaceRect()
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{
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nsBandTrapezoid* trapezoid = data;
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if (count > 1) {
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// If there's more than one trapezoid that means there are floaters
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PRInt32 i;
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// Stop when we get to space occupied by a right floater, or when we've
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// looked at every trapezoid and none are right floaters
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for (i = 0; i < count; i++) {
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nsBandTrapezoid* trapezoid = &data[i];
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if (trapezoid->state != nsBandTrapezoid::Available) {
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const nsStyleDisplay* display;
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if (nsBandTrapezoid::OccupiedMultiple == trapezoid->state) {
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PRInt32 j, numFrames = trapezoid->frames->Count();
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NS_ASSERTION(numFrames > 0, "bad trapezoid frame list");
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for (j = 0; j < numFrames; j++) {
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nsIFrame* f = (nsIFrame*)trapezoid->frames->ElementAt(j);
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f->GetStyleData(eStyleStruct_Display,
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(const nsStyleStruct*&)display);
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if (NS_STYLE_FLOAT_RIGHT == display->mFloats) {
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goto foundRightFloater;
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}
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}
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} else {
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trapezoid->frame->GetStyleData(eStyleStruct_Display,
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(const nsStyleStruct*&)display);
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if (NS_STYLE_FLOAT_RIGHT == display->mFloats) {
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break;
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}
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}
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}
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}
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foundRightFloater:
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if (i > 0) {
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trapezoid = &data[i - 1];
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}
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}
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if (nsBandTrapezoid::Available == trapezoid->state) {
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// The trapezoid is available
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trapezoid->GetRect(availSpace);
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} else {
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const nsStyleDisplay* display;
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// The trapezoid is occupied. That means there's no available space
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trapezoid->GetRect(availSpace);
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// XXX Better handle the case of multiple frames
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if (nsBandTrapezoid::Occupied == trapezoid->state) {
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trapezoid->frame->GetStyleData(eStyleStruct_Display,
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(const nsStyleStruct*&)display);
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if (NS_STYLE_FLOAT_LEFT == display->mFloats) {
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availSpace.x = availSpace.XMost();
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}
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}
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availSpace.width = 0;
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}
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}
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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 ((eFramePaintLayer_Overlay == aWhichLayer) && nsIFrame::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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BandData band;
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nscoord y = 0;
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while (y < mRect.height) {
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sm->GetBandData(y, nsSize(mRect.width, mRect.height - y), band);
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band.ComputeAvailSpaceRect();
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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, band.availSpace.y,
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mRect.width, band.availSpace.height);
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aRenderingContext.DrawLine(0, band.availSpace.y,
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mRect.width, band.availSpace.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.count; i++) {
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nsBandTrapezoid* trapezoid = &band.data[i];
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if (nsBandTrapezoid::Available != trapezoid->state) {
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nsRect r;
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trapezoid->GetRect(r);
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if (nsBandTrapezoid::OccupiedMultiple == trapezoid->state) {
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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 = band.availSpace.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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aXMost = aYMost = 0;
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for (nsIFrame* f = mAbsoluteFrames.FirstChild(); nsnull != f; f->GetNextSibling(f)) {
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// Get the frame's x-most and y-most. This is for its flowed content only
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nsRect rect;
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f->GetRect(rect);
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if (rect.XMost() > aXMost) {
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aXMost = rect.XMost();
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}
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if (rect.YMost() > aYMost) {
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aYMost = rect.YMost();
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}
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// If the child frame is also an area frame, then take into account its child
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// absolutely positioned elements
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nsIAreaFrame* areaFrame;
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if (NS_SUCCEEDED(f->QueryInterface(kAreaFrameIID, (void**)&areaFrame))) {
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nscoord xMost, yMost;
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areaFrame->GetPositionedInfo(xMost, yMost);
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// Convert to our coordinate space
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xMost += rect.x;
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yMost += rect.y;
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if (xMost > aXMost) {
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aXMost = xMost;
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}
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if (yMost > aYMost) {
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aYMost = yMost;
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}
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}
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}
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return NS_OK;
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}
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// XXX Temporary until the view code allows positioned child views to extend
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// outside their parent without being clipped...
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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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nsresult rv = nsBlockFrame::DidReflow(aPresContext, aStatus);
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if (NS_FRAME_REFLOW_FINISHED == aStatus) {
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nsIView* view;
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GetView(view);
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// Size and position the view if requested
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if (nsnull != view) {
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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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GetOffsetFromView(origin, parentWithView);
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nsIViewManager *vm;
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view->GetViewManager(vm);
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// Take into account any absolutely positioned children
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nscoord xMost, yMost;
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GetPositionedInfo(xMost, yMost);
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vm->ResizeView(view, PR_MAX(mRect.width, xMost), PR_MAX(mRect.height, yMost));
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vm->MoveViewTo(view, origin.x, origin.y);
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NS_RELEASE(vm);
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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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// Make a copy of the reflow state so we can set the space manager
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nsHTMLReflowState reflowState(aReflowState);
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if (nsnull != mSpaceManager) {
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reflowState.spaceManager = mSpaceManager;
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// Clear the spacemanager's regions.
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mSpaceManager->ClearRegions();
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}
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// See if the reflow command is for an absolutely positioned frame
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PRBool wasHandled = PR_FALSE;
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if (eReflowReason_Incremental == aReflowState.reason) {
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nsIFrame* targetFrame;
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aReflowState.reflowCommand->GetTarget(targetFrame);
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if (this == targetFrame) {
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nsIAtom* listName;
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PRBool isAbsoluteChild;
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// See if it's for an absolutely positioned child frame
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aReflowState.reflowCommand->GetChildListName(listName);
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isAbsoluteChild = nsLayoutAtoms::absoluteList == listName;
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NS_IF_RELEASE(listName);
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if (isAbsoluteChild) {
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nsIReflowCommand::ReflowType type;
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aReflowState.reflowCommand->GetType(type);
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// Handle each specific type
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if (nsIReflowCommand::FrameAppended == type) {
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// Add the frames to our list of absolutely position frames
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nsIFrame* childFrames;
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aReflowState.reflowCommand->GetChildFrame(childFrames);
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NS_ASSERTION(nsnull != childFrames, "null child list");
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AddAbsoluteFrame(childFrames);
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// Indicate we handled the reflow command
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wasHandled = PR_TRUE;
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} else if (nsIReflowCommand::FrameRemoved == type) {
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// Get the new frame
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nsIFrame* childFrame;
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aReflowState.reflowCommand->GetChildFrame(childFrame);
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PRBool zap = mAbsoluteFrames.DeleteFrame(aPresContext, childFrame);
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NS_ASSERTION(zap, "didn't find frame");
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// XXX We don't need to reflow all the absolutely positioned
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// frames. Compute the desired size and exit...
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wasHandled = PR_TRUE;
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} else if (nsIReflowCommand::FrameInserted == type) {
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// Get the new frame
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nsIFrame* childFrame;
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aReflowState.reflowCommand->GetChildFrame(childFrame);
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// Get the previous sibling
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nsIFrame* prevSibling;
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aReflowState.reflowCommand->GetPrevSiblingFrame(prevSibling);
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// Insert the frame
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mAbsoluteFrames.InsertFrame(nsnull, prevSibling, childFrame);
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wasHandled = PR_TRUE;
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} else {
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NS_ASSERTION(PR_FALSE, "unexpected reflow type");
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}
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}
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}
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}
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if (!wasHandled) {
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// XXX We need to peek at incremental reflow commands and see if the next
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// frame is one of the absolutely positioned frames...
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rv = nsBlockFrame::Reflow(aPresContext, aDesiredSize, reflowState, aStatus);
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}
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// Reflow any absolutely positioned frames that need reflowing
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// XXX We shouldn't really be doing this for all incremental reflow commands
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ReflowAbsoluteItems(aPresContext, reflowState);
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// Compute our desired size. Take into account any floaters when computing the
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// height
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if (nsnull != mSpaceManager) {
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nscoord floaterYMost;
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mSpaceManager->YMost(floaterYMost);
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if (floaterYMost > 0) {
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// What we need to check for is if the bottom most floater extends below
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// the content area of the desired size
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nsMargin borderPadding;
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nscoord contentYMost;
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nsHTMLReflowState::ComputeBorderPaddingFor(this, aReflowState.parentReflowState,
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borderPadding);
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contentYMost = aDesiredSize.height - borderPadding.bottom;
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if (floaterYMost > contentYMost) {
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aDesiredSize.height += floaterYMost - contentYMost;
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}
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}
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}
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// XXX This code is really temporary; the lower level frame
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// classes need to contribute to the area that needs damage
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// repair. This class should only worry about damage repairing
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// it's border+padding area.
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nsRect damageArea(0, 0, 0, 0);
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// Decide how much to repaint based on the reflow type.
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// Note: we don't have to handle the initial reflow case and the
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// resize reflow case, because they're handled by the scroll frame
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if (eReflowReason_Incremental == aReflowState.reason) {
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nsIReflowCommand::ReflowType reflowType;
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aReflowState.reflowCommand->GetType(reflowType);
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// For append reflow commands that target the flowed frames just
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// repaint the newly added part of the frame.
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if (nsIReflowCommand::FrameAppended == reflowType) {
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//this blows. we're repainting everything, but we have no choice
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//since we don't know how we got here. see the XXX above for a
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//real fix.
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#if 1
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damageArea.y = 0;
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damageArea.height = aDesiredSize.height;
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damageArea.width = aDesiredSize.width;
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#else
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// It's an append reflow command
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damageArea.y = mRect.YMost();
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damageArea.width = aDesiredSize.width;
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damageArea.height = aDesiredSize.height - mRect.height;
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if ((damageArea.height < 0) ||
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(aDesiredSize.height == mRect.height)) {
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// Since we don't know what changed, assume it all changed.
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damageArea.y = 0;
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damageArea.height = aDesiredSize.height;
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}
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#endif
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} else {
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// Ideally the frame that is the target of the reflow command
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// (or its parent frame) would generate a damage rect, but
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// since none of the frame classes know how to do this then
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// for the time being just repaint the entire frame
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damageArea.width = aDesiredSize.width;
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// If the new height is smaller than the old height then make
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// sure we erase whatever used to be displayed
|
|
damageArea.height = PR_MAX(aDesiredSize.height, mRect.height);
|
|
}
|
|
}
|
|
|
|
// If this is really the body, force a repaint of the damage area
|
|
if ((NS_BLOCK_DOCUMENT_ROOT & mFlags) && !damageArea.IsEmpty()) {
|
|
Invalidate(damageArea);
|
|
}
|
|
|
|
return rv;
|
|
}
|
|
|
|
NS_METHOD
|
|
nsAreaFrame::CreateContinuingFrame(nsIPresContext& aPresContext,
|
|
nsIFrame* aParent,
|
|
nsIStyleContext* aStyleContext,
|
|
nsIFrame*& aContinuingFrame)
|
|
{
|
|
nsAreaFrame* cf = new nsAreaFrame;
|
|
if (nsnull == cf) {
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
}
|
|
cf->Init(aPresContext, mContent, aParent, aStyleContext);
|
|
cf->SetFlags(mFlags);
|
|
cf->AppendToFlow(this);
|
|
aContinuingFrame = cf;
|
|
return NS_OK;
|
|
}
|
|
|
|
/////////////////////////////////////////////////////////////////////////////
|
|
// Helper functions
|
|
|
|
// Add the frame to the end of the child list
|
|
void nsAreaFrame::AddAbsoluteFrame(nsIFrame* aFrame)
|
|
{
|
|
mAbsoluteFrames.AppendFrames(nsnull, aFrame);
|
|
}
|
|
|
|
// Called at the end of the Reflow() member function so we can process
|
|
// any abolutely positioned items that need to be reflowed
|
|
void
|
|
nsAreaFrame::ReflowAbsoluteItems(nsIPresContext& aPresContext,
|
|
const nsHTMLReflowState& aReflowState)
|
|
{
|
|
for (nsIFrame* absoluteFrame = mAbsoluteFrames.FirstChild();
|
|
nsnull != absoluteFrame; absoluteFrame->GetNextSibling(absoluteFrame)) {
|
|
|
|
PRBool placeFrame = PR_FALSE;
|
|
#if 0
|
|
PRBool reflowFrame = PR_FALSE;
|
|
#else
|
|
PRBool reflowFrame = PR_TRUE;
|
|
#endif
|
|
nsReflowReason reflowReason = eReflowReason_Resize;
|
|
|
|
// Get its style information
|
|
const nsStyleDisplay* display;
|
|
const nsStylePosition* position;
|
|
|
|
absoluteFrame->GetStyleData(eStyleStruct_Display, (const nsStyleStruct*&)display);
|
|
absoluteFrame->GetStyleData(eStyleStruct_Position, (const nsStyleStruct*&)position);
|
|
|
|
#if 0
|
|
// See whether the frame is a newly added frame
|
|
if (!IsAbsoluteFrame(absoluteFrame)) {
|
|
// The absolutely position item hasn't yet been added to our child list
|
|
absoluteFrame->SetGeometricParent(this);
|
|
|
|
// Add the absolutely positioned frame to the end of the child list
|
|
AddAbsoluteFrame(absoluteFrame);
|
|
|
|
// See whether this is the frame's initial reflow
|
|
nsFrameState frameState;
|
|
absoluteFrame->GetFrameState(frameState);
|
|
if (frameState & NS_FRAME_FIRST_REFLOW) {
|
|
reflowReason = eReflowReason_Initial;
|
|
}
|
|
|
|
// We need to place and reflow the absolutely positioned frame
|
|
placeFrame = reflowFrame = PR_TRUE;
|
|
|
|
} else {
|
|
#endif
|
|
// We need to place the frame if the left-offset or the top-offset are
|
|
// auto or a percentage
|
|
if ((eStyleUnit_Coord != position->mOffset.GetLeftUnit()) ||
|
|
(eStyleUnit_Coord != position->mOffset.GetTopUnit())) {
|
|
placeFrame = PR_TRUE;
|
|
}
|
|
|
|
// We need to reflow the frame if its width or its height is auto or
|
|
// a percentage
|
|
if ((eStyleUnit_Coord != position->mWidth.GetUnit()) ||
|
|
(eStyleUnit_Coord != position->mHeight.GetUnit())) {
|
|
reflowFrame = PR_TRUE;
|
|
}
|
|
#if 0
|
|
}
|
|
#endif
|
|
|
|
if (placeFrame || reflowFrame) {
|
|
nsIHTMLReflow* htmlReflow;
|
|
if (NS_OK == absoluteFrame->QueryInterface(kIHTMLReflowIID, (void**)&htmlReflow)) {
|
|
htmlReflow->WillReflow(aPresContext);
|
|
|
|
if (reflowFrame) {
|
|
nsSize availSize(aReflowState.computedWidth, NS_UNCONSTRAINEDSIZE);
|
|
nsHTMLReflowMetrics kidDesiredSize(nsnull);
|
|
nsHTMLReflowState kidReflowState(aPresContext, absoluteFrame,
|
|
aReflowState, availSize,
|
|
reflowReason);
|
|
nsReflowStatus status;
|
|
// XXX Temporary hack until the block/inline code starts using 'computedWidth'
|
|
kidReflowState.availableWidth = kidReflowState.computedWidth;
|
|
htmlReflow->Reflow(aPresContext, kidDesiredSize, kidReflowState, status);
|
|
|
|
#if 0
|
|
// Figure out what size to actually use. If we let the child choose its
|
|
// size, then use what the child requested. Otherwise, use the value
|
|
// specified in the style information
|
|
if ((eStyleUnit_Auto == position->mWidth.GetUnit()) ||
|
|
((desiredSize.width > availSize.width) &&
|
|
(NS_STYLE_OVERFLOW_VISIBLE == display->mOverflow))) {
|
|
rect.width = desiredSize.width;
|
|
}
|
|
if ((eStyleUnit_Auto == position->mHeight.GetUnit()) ||
|
|
(NS_UNCONSTRAINEDSIZE == rect.height) ||
|
|
((desiredSize.height > rect.height) &&
|
|
(NS_STYLE_OVERFLOW_VISIBLE == display->mOverflow))) {
|
|
rect.height = desiredSize.height;
|
|
}
|
|
#else
|
|
nsRect rect(kidReflowState.computedOffsets.left + kidReflowState.computedMargin.left,
|
|
kidReflowState.computedOffsets.top + kidReflowState.computedMargin.top,
|
|
kidDesiredSize.width, kidDesiredSize.height);
|
|
#endif
|
|
absoluteFrame->SetRect(rect);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// Translate aPoint from aFrameFrom's coordinate space to our coordinate space
|
|
void nsAreaFrame::TranslatePoint(nsIFrame* aFrameFrom, nsPoint& aPoint) const
|
|
{
|
|
nsIFrame* parent;
|
|
|
|
aFrameFrom->GetParent(parent);
|
|
while ((nsnull != parent) && (parent != (nsIFrame*)this)) {
|
|
nsPoint origin;
|
|
|
|
parent->GetOrigin(origin);
|
|
aPoint += origin;
|
|
parent->GetParent(parent);
|
|
}
|
|
}
|
|
|
|
void nsAreaFrame::ComputeAbsoluteFrameBounds(nsIPresContext& aPresContext,
|
|
nsIFrame* aFrame,
|
|
const nsHTMLReflowState& aReflowState,
|
|
const nsStylePosition* aPosition,
|
|
nsRect& aRect) const
|
|
{
|
|
// Compute the offset and size of the view based on the position properties,
|
|
// and the inner rect of the containing block (which we get from the reflow
|
|
// state)
|
|
//
|
|
// If either the left or top are 'auto' then get the offset of the anchor
|
|
// frame from this frame
|
|
nsPoint offset(0, 0);
|
|
if ((eStyleUnit_Auto == aPosition->mOffset.GetLeftUnit()) ||
|
|
(eStyleUnit_Auto == aPosition->mOffset.GetTopUnit())) {
|
|
// Get the placeholder frame
|
|
nsIFrame* placeholderFrame;
|
|
nsIPresShell* presShell = aPresContext.GetShell();
|
|
|
|
presShell->GetPlaceholderFrameFor(aFrame, placeholderFrame);
|
|
NS_RELEASE(presShell);
|
|
NS_ASSERTION(nsnull != placeholderFrame, "no placeholder frame");
|
|
if (nsnull != placeholderFrame) {
|
|
placeholderFrame->GetOrigin(offset);
|
|
TranslatePoint(placeholderFrame, offset);
|
|
}
|
|
}
|
|
|
|
// left-offset
|
|
if (eStyleUnit_Auto == aPosition->mOffset.GetLeftUnit()) {
|
|
// Use the current x-offset of the anchor frame translated into our
|
|
// coordinate space
|
|
aRect.x = offset.x;
|
|
} else if (eStyleUnit_Coord == aPosition->mOffset.GetLeftUnit()) {
|
|
nsStyleCoord coord;
|
|
aRect.x = aPosition->mOffset.GetLeft(coord).GetCoordValue();
|
|
} else {
|
|
NS_ASSERTION(eStyleUnit_Percent == aPosition->mOffset.GetLeftUnit(),
|
|
"unexpected offset type");
|
|
// Percentage values refer to the width of the containing block. If the
|
|
// width is unconstrained then just use 0
|
|
if (NS_UNCONSTRAINEDSIZE == aReflowState.availableWidth) {
|
|
aRect.x = 0;
|
|
} else {
|
|
nsStyleCoord coord;
|
|
aRect.x = (nscoord)((float)aReflowState.availableWidth *
|
|
aPosition->mOffset.GetLeft(coord).GetPercentValue());
|
|
}
|
|
}
|
|
|
|
// top-offset
|
|
if (eStyleUnit_Auto == aPosition->mOffset.GetTopUnit()) {
|
|
// Use the current y-offset of the anchor frame translated into our
|
|
// coordinate space
|
|
aRect.y = offset.y;
|
|
} else if (eStyleUnit_Coord == aPosition->mOffset.GetTopUnit()) {
|
|
nsStyleCoord coord;
|
|
aRect.y = aPosition->mOffset.GetTop(coord).GetCoordValue();
|
|
} else {
|
|
NS_ASSERTION(eStyleUnit_Percent == aPosition->mOffset.GetTopUnit(),
|
|
"unexpected offset type");
|
|
// Percentage values refer to the height of the containing block. If the
|
|
// height is unconstrained then interpret it like 'auto'
|
|
if (NS_UNCONSTRAINEDSIZE == aReflowState.availableHeight) {
|
|
aRect.y = offset.y;
|
|
} else {
|
|
nsStyleCoord coord;
|
|
aRect.y = (nscoord)((float)aReflowState.availableHeight *
|
|
aPosition->mOffset.GetTop(coord).GetPercentValue());
|
|
}
|
|
}
|
|
|
|
// XXX We aren't properly handling 'auto' width and height
|
|
// XXX The width/height represent the size of the padding area only, and not
|
|
// the frame size...
|
|
|
|
// width
|
|
if (eStyleUnit_Auto == aPosition->mWidth.GetUnit()) {
|
|
// Use the right-edge of the containing block
|
|
aRect.width = aReflowState.availableWidth - aRect.x;
|
|
} else if (eStyleUnit_Coord == aPosition->mWidth.GetUnit()) {
|
|
aRect.width = aPosition->mWidth.GetCoordValue();
|
|
} else {
|
|
NS_ASSERTION(eStyleUnit_Percent == aPosition->mWidth.GetUnit(),
|
|
"unexpected width type");
|
|
// Percentage values refer to the width of the containing block
|
|
if (NS_UNCONSTRAINEDSIZE == aReflowState.availableWidth) {
|
|
aRect.width = NS_UNCONSTRAINEDSIZE;
|
|
} else {
|
|
aRect.width = (nscoord)((float)aReflowState.availableWidth *
|
|
aPosition->mWidth.GetPercentValue());
|
|
}
|
|
}
|
|
|
|
// height
|
|
if (eStyleUnit_Auto == aPosition->mHeight.GetUnit()) {
|
|
// Allow it to be as high as it wants
|
|
aRect.height = NS_UNCONSTRAINEDSIZE;
|
|
} else if (eStyleUnit_Coord == aPosition->mHeight.GetUnit()) {
|
|
aRect.height = aPosition->mHeight.GetCoordValue();
|
|
} else {
|
|
NS_ASSERTION(eStyleUnit_Percent == aPosition->mHeight.GetUnit(),
|
|
"unexpected height type");
|
|
// Percentage values refer to the height of the containing block. If the
|
|
// height is unconstrained, then interpret it like 'auto' and make the
|
|
// height unconstrained
|
|
if (NS_UNCONSTRAINEDSIZE == aReflowState.availableHeight) {
|
|
aRect.height = NS_UNCONSTRAINEDSIZE;
|
|
} else {
|
|
aRect.height = (nscoord)((float)aReflowState.availableHeight *
|
|
aPosition->mHeight.GetPercentValue());
|
|
}
|
|
}
|
|
}
|
|
|
|
/////////////////////////////////////////////////////////////////////////////
|
|
// Diagnostics
|
|
|
|
NS_IMETHODIMP
|
|
nsAreaFrame::GetFrameName(nsString& aResult) const
|
|
{
|
|
return MakeFrameName("Area", aResult);
|
|
}
|