зеркало из https://github.com/mozilla/gecko-dev.git
539 строки
21 KiB
C++
539 строки
21 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: NPL 1.1/GPL 2.0/LGPL 2.1
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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 1.1 (the "License"); you may not use this file except in
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* compliance with the License. You may obtain a copy of the License at
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* http://www.mozilla.org/NPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is mozilla.org code.
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*
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* The Initial Developer of the Original Code is
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 1998
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the NPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the NPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#include "nsCOMPtr.h"
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#include "nsAbsoluteContainingBlock.h"
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#include "nsContainerFrame.h"
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#include "nsReflowPath.h"
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#include "nsIViewManager.h"
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#include "nsLayoutAtoms.h"
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#include "nsIPresShell.h"
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#include "nsHTMLParts.h"
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#include "nsIPresContext.h"
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#ifdef DEBUG
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#include "nsBlockFrame.h"
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#endif
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nsresult
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nsAbsoluteContainingBlock::FirstChild(const nsIFrame* aDelegatingFrame,
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nsIAtom* aListName,
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nsIFrame** aFirstChild) const
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{
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NS_PRECONDITION(GetChildListName() == aListName, "unexpected child list name");
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*aFirstChild = mAbsoluteFrames.FirstChild();
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return NS_OK;
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}
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nsresult
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nsAbsoluteContainingBlock::SetInitialChildList(nsIFrame* aDelegatingFrame,
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nsIPresContext* aPresContext,
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nsIAtom* aListName,
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nsIFrame* aChildList)
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{
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NS_PRECONDITION(GetChildListName() == aListName, "unexpected child list name");
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#ifdef NS_DEBUG
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nsFrame::VerifyDirtyBitSet(aChildList);
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#endif
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mAbsoluteFrames.SetFrames(aChildList);
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return NS_OK;
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}
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nsresult
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nsAbsoluteContainingBlock::AppendFrames(nsIFrame* aDelegatingFrame,
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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 = NS_OK;
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// Append the frames to our list of absolutely positioned frames
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#ifdef NS_DEBUG
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nsFrame::VerifyDirtyBitSet(aFrameList);
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#endif
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mAbsoluteFrames.AppendFrames(nsnull, aFrameList);
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// Generate a reflow command to reflow the dirty frames
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nsHTMLReflowCommand* reflowCmd;
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rv = NS_NewHTMLReflowCommand(&reflowCmd, aDelegatingFrame, eReflowType_ReflowDirty);
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if (NS_SUCCEEDED(rv)) {
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reflowCmd->SetChildListName(GetChildListName());
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aPresShell.AppendReflowCommand(reflowCmd);
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}
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return rv;
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}
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nsresult
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nsAbsoluteContainingBlock::InsertFrames(nsIFrame* aDelegatingFrame,
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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 = NS_OK;
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// Insert the new frames
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#ifdef NS_DEBUG
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nsFrame::VerifyDirtyBitSet(aFrameList);
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#endif
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mAbsoluteFrames.InsertFrames(nsnull, aPrevFrame, aFrameList);
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// Generate a reflow command to reflow the dirty frames
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nsHTMLReflowCommand* reflowCmd;
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rv = NS_NewHTMLReflowCommand(&reflowCmd, aDelegatingFrame, eReflowType_ReflowDirty);
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if (NS_SUCCEEDED(rv)) {
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reflowCmd->SetChildListName(GetChildListName());
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aPresShell.AppendReflowCommand(reflowCmd);
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}
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return rv;
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}
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nsresult
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nsAbsoluteContainingBlock::RemoveFrame(nsIFrame* aDelegatingFrame,
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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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PRBool result = mAbsoluteFrames.DestroyFrame(aPresContext, aOldFrame);
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NS_ASSERTION(result, "didn't find frame to delete");
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// Because positioned frames aren't part of a flow, there's no additional
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// work to do, e.g. reflowing sibling frames. And because positioned frames
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// have a view, we don't need to repaint
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return result ? NS_OK : NS_ERROR_FAILURE;
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}
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nsresult
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nsAbsoluteContainingBlock::ReplaceFrame(nsIFrame* aDelegatingFrame,
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nsIPresContext* aPresContext,
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nsIPresShell& aPresShell,
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nsIAtom* aListName,
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nsIFrame* aOldFrame,
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nsIFrame* aNewFrame)
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{
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PRBool result = mAbsoluteFrames.ReplaceFrame(aPresContext, aDelegatingFrame,
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aOldFrame, aNewFrame, PR_TRUE);
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NS_ASSERTION(result, "Problems replacing a frame");
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return result ? NS_OK : NS_ERROR_FAILURE;
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}
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nsresult
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nsAbsoluteContainingBlock::Reflow(nsIFrame* aDelegatingFrame,
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nsIPresContext* aPresContext,
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const nsHTMLReflowState& aReflowState,
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nscoord aContainingBlockWidth,
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nscoord aContainingBlockHeight,
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nsRect* aChildBounds)
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{
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// Initialize OUT parameter
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if (aChildBounds)
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aChildBounds->SetRect(0, 0, 0, 0);
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// Make a copy of the reflow state. If the reason is
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// eReflowReason_Incremental (which should mean either that the target
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// is the frame for which this is the absolute container or that the
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// container changed size due to incremental reflow of its children),
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// then change it to eReflowReason_Resize.
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// XXXldb If the target is this frame, shouldn't we be setting it
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// appropriately (which might mean to StyleChanged)?
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nsHTMLReflowState reflowState(aReflowState);
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if (eReflowReason_Incremental == reflowState.reason) {
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reflowState.reason = eReflowReason_Resize;
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}
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nsIFrame* kidFrame;
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for (kidFrame = mAbsoluteFrames.FirstChild(); kidFrame; kidFrame = kidFrame->GetNextSibling()) {
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nsReflowReason reason = reflowState.reason;
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nsFrameState kidState = kidFrame->GetStateBits();
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if (NS_FRAME_FIRST_REFLOW & kidState) {
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// The frame has never had a reflow, so change the reason to eReflowReason_Initial
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reason = eReflowReason_Initial;
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} else if (NS_FRAME_IS_DIRTY & kidState) {
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// The frame is dirty so give it the correct reflow reason
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reason = eReflowReason_Dirty;
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}
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// Reflow the frame
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nsReflowStatus kidStatus;
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ReflowAbsoluteFrame(aDelegatingFrame, aPresContext, reflowState, aContainingBlockWidth,
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aContainingBlockHeight, kidFrame, reason, kidStatus);
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if (aChildBounds) {
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// Add in the child's bounds
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nsRect kidBounds = kidFrame->GetRect();
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aChildBounds->UnionRect(*aChildBounds, kidBounds);
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// If the frame has visible overflow, then take it into account, too.
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if (kidFrame->GetStateBits() & NS_FRAME_OUTSIDE_CHILDREN) {
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// Get the property
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nsRect* overflowArea = kidFrame->GetOverflowAreaProperty(aPresContext);
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if (overflowArea) {
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// The overflow area is in the child's coordinate space, so translate
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// it into the parent's coordinate space
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nsRect rect(*overflowArea);
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rect.MoveBy(kidBounds.x, kidBounds.y);
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aChildBounds->UnionRect(*aChildBounds, rect);
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}
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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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void
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nsAbsoluteContainingBlock::CalculateChildBounds(nsIPresContext* aPresContext,
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nsRect& aChildBounds)
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{
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// Initialize the OUT parameters
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aChildBounds.SetRect(0, 0, 0, 0);
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for (nsIFrame* f = mAbsoluteFrames.FirstChild(); f; f = f->GetNextSibling()) {
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// Add in the child's bounds
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nsRect bounds = f->GetRect();
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aChildBounds.UnionRect(aChildBounds, bounds);
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// If the frame has visible overflow, then take it into account, too.
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if (f->GetStateBits() & NS_FRAME_OUTSIDE_CHILDREN) {
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// Get the property
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nsRect* overflowArea = f->GetOverflowAreaProperty(aPresContext);
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if (overflowArea) {
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// The overflow area is in the child's coordinate space, so translate
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// it into the parent's coordinate space
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nsRect rect(*overflowArea);
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rect.MoveBy(bounds.x, bounds.y);
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aChildBounds.UnionRect(aChildBounds, rect);
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}
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}
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}
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}
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nsresult
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nsAbsoluteContainingBlock::IncrementalReflow(nsIFrame* aDelegatingFrame,
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nsIPresContext* aPresContext,
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const nsHTMLReflowState& aReflowState,
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nscoord aContainingBlockWidth,
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nscoord aContainingBlockHeight,
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PRBool& aWasHandled)
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{
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// Initialize the OUT parameters
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// Assume we handled the incremental reflow
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// until we find something that requires a full block reflow
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aWasHandled = PR_TRUE;
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// See if the reflow command is targeted at us.
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nsReflowPath *path = aReflowState.path;
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nsHTMLReflowCommand *command = path->mReflowCommand;
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if (command) {
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// It's targeted at us. See if it's for the positioned child frames
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nsCOMPtr<nsIAtom> listName;
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command->GetChildListName(*getter_AddRefs(listName));
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if (GetChildListName() == listName) {
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nsReflowType type;
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// Get the type of reflow command
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command->GetType(type);
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// The only type of reflow command we expect is that we have dirty
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// child frames to reflow
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NS_ASSERTION(type == eReflowType_ReflowDirty, "unexpected reflow type");
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// Walk the positioned frames and reflow the dirty frames
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for (nsIFrame* f = mAbsoluteFrames.FirstChild(); f; f = f->GetNextSibling()) {
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nsFrameState frameState = f->GetStateBits();
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if (frameState & NS_FRAME_IS_DIRTY) {
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nsReflowStatus status;
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nsReflowReason reason;
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reason = (frameState & NS_FRAME_FIRST_REFLOW)
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? eReflowReason_Initial
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: eReflowReason_Dirty;
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ReflowAbsoluteFrame(aDelegatingFrame, aPresContext, aReflowState,
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aContainingBlockWidth, aContainingBlockHeight, f,
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reason, status);
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}
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}
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} else {
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// A reflow command is targeted directly at this block.
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// The block will have to do a proper reflow.
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// But keep going to make sure that we process any dirty absolute frames, below.
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aWasHandled = PR_FALSE;
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}
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}
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nsReflowPath::iterator iter = path->FirstChild();
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nsReflowPath::iterator end = path->EndChildren();
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if (iter != end && mAbsoluteFrames.NotEmpty()) {
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for ( ; iter != end; ++iter) {
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// See if it's one of our absolutely positioned child frames
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if (mAbsoluteFrames.ContainsFrame(*iter)) {
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// Remove the next frame from the reflow path
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nsReflowStatus kidStatus;
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ReflowAbsoluteFrame(aDelegatingFrame, aPresContext, aReflowState,
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aContainingBlockWidth, aContainingBlockHeight, *iter,
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aReflowState.reason, kidStatus);
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// We don't need to invalidate anything because the frame
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// should invalidate any area within its frame that needs
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// repainting, and because it has a view if it changes size
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// the view manager will damage the dirty area
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// Prune the path so we don't flow the block frame _again_
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// when returning to the caller.
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aReflowState.path->Remove(iter);
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}
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else {
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// At least one of the frames along the reflow path wasn't
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// absolutely positioned, so we'll need to deal with it in
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// normal block reflow.
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aWasHandled = PR_FALSE;
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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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void
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nsAbsoluteContainingBlock::DestroyFrames(nsIFrame* aDelegatingFrame,
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nsIPresContext* aPresContext)
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{
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mAbsoluteFrames.DestroyFrames(aPresContext);
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}
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// XXX Optimize the case where it's a resize reflow and the absolutely
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// positioned child has the exact same size and position and skip the
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// reflow...
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// When bug 154892 is checked in, make sure that when
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// GetChildListName() == nsLayoutAtoms::fixedList, the height is unconstrained.
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// since we don't allow replicated frames to split.
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nsresult
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nsAbsoluteContainingBlock::ReflowAbsoluteFrame(nsIFrame* aDelegatingFrame,
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nsIPresContext* aPresContext,
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const nsHTMLReflowState& aReflowState,
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nscoord aContainingBlockWidth,
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nscoord aContainingBlockHeight,
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nsIFrame* aKidFrame,
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nsReflowReason aReason,
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nsReflowStatus& aStatus)
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{
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#ifdef DEBUG
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if (nsBlockFrame::gNoisyReflow) {
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nsFrame::IndentBy(stdout,nsBlockFrame::gNoiseIndent);
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printf("abs pos ");
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if (nsnull != aKidFrame) {
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nsIFrameDebug* frameDebug;
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if (NS_SUCCEEDED(CallQueryInterface(aKidFrame, &frameDebug))) {
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nsAutoString name;
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frameDebug->GetFrameName(name);
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printf("%s ", NS_LossyConvertUCS2toASCII(name).get());
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}
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}
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printf("r=%d",aReflowState.reason);
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if (aReflowState.reason == eReflowReason_Incremental) {
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nsHTMLReflowCommand *command = aReflowState.path->mReflowCommand;
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if (command) {
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// We're the target.
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nsReflowType type;
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command->GetType(type);
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printf("(%d)", type);
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}
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}
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char width[16];
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char height[16];
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PrettyUC(aReflowState.availableWidth, width);
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PrettyUC(aReflowState.availableHeight, height);
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printf(" a=%s,%s ", width, height);
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PrettyUC(aReflowState.mComputedWidth, width);
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PrettyUC(aReflowState.mComputedHeight, height);
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printf("c=%s,%s \n", width, height);
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}
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if (nsBlockFrame::gNoisy) {
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nsBlockFrame::gNoiseIndent++;
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}
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#endif // DEBUG
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nsresult rv;
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nsMargin border;
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// Get the border values
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if (!aReflowState.mStyleBorder->GetBorder(border)) {
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NS_NOTYETIMPLEMENTED("percentage border");
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}
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nsSize availSize(aReflowState.mComputedWidth, NS_UNCONSTRAINEDSIZE);
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nsHTMLReflowMetrics kidDesiredSize(nsnull);
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nsHTMLReflowState kidReflowState(aPresContext, aReflowState, aKidFrame,
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availSize, aContainingBlockWidth,
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aContainingBlockHeight,
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aReason);
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// Send the WillReflow() notification and position the frame
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aKidFrame->WillReflow(aPresContext);
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// XXXldb We can simplify this if we come up with a better way to
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// position views.
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nscoord x;
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if (NS_AUTOOFFSET == kidReflowState.mComputedOffsets.left) {
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// Just use the current x-offset
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x = aKidFrame->GetPosition().x;
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} else {
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x = border.left + kidReflowState.mComputedOffsets.left + kidReflowState.mComputedMargin.left;
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}
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aKidFrame->SetPosition(nsPoint(x, border.top + kidReflowState.mComputedOffsets.top + kidReflowState.mComputedMargin.top));
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// Position its view, but don't bother it doing it now if we haven't
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// yet determined the left offset
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if (NS_AUTOOFFSET != kidReflowState.mComputedOffsets.left) {
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nsContainerFrame::PositionFrameView(aPresContext, aKidFrame);
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}
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// Do the reflow
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rv = aKidFrame->Reflow(aPresContext, kidDesiredSize, kidReflowState, aStatus);
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// If we're solving for 'left' or 'top', then compute it now that we know the
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// width/height
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if ((NS_AUTOOFFSET == kidReflowState.mComputedOffsets.left) ||
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(NS_AUTOOFFSET == kidReflowState.mComputedOffsets.top)) {
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if (-1 == aContainingBlockWidth) {
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// Get the containing block width/height
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kidReflowState.ComputeContainingBlockRectangle(aPresContext,
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&aReflowState,
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aContainingBlockWidth,
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aContainingBlockHeight);
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}
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if (NS_AUTOOFFSET == kidReflowState.mComputedOffsets.left) {
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kidReflowState.mComputedOffsets.left = aContainingBlockWidth -
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kidReflowState.mComputedOffsets.right -
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kidReflowState.mComputedMargin.right -
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kidDesiredSize.width -
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kidReflowState.mComputedMargin.left;
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}
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if (NS_AUTOOFFSET == kidReflowState.mComputedOffsets.top) {
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kidReflowState.mComputedOffsets.top = aContainingBlockHeight -
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kidReflowState.mComputedOffsets.bottom -
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kidReflowState.mComputedMargin.bottom -
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kidDesiredSize.height -
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kidReflowState.mComputedMargin.top;
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}
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}
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// Position the child relative to our padding edge
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nsRect rect(border.left + kidReflowState.mComputedOffsets.left + kidReflowState.mComputedMargin.left,
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border.top + kidReflowState.mComputedOffsets.top + kidReflowState.mComputedMargin.top,
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kidDesiredSize.width, kidDesiredSize.height);
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aKidFrame->SetRect(rect);
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// Size and position the view and set its opacity, visibility, content
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// transparency, and clip
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nsContainerFrame::SyncFrameViewAfterReflow(aPresContext, aKidFrame,
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aKidFrame->GetView(),
|
|
&kidDesiredSize.mOverflowArea);
|
|
aKidFrame->DidReflow(aPresContext, &kidReflowState, NS_FRAME_REFLOW_FINISHED);
|
|
|
|
// If the frame has visible overflow, then store it as a property on the
|
|
// frame. This allows us to be able to recover it without having to reflow
|
|
// the frame
|
|
if (aKidFrame->GetStateBits() & NS_FRAME_OUTSIDE_CHILDREN) {
|
|
// Get the property (creating a rect struct if necessary)
|
|
nsRect* overflowArea = aKidFrame->GetOverflowAreaProperty(aPresContext, PR_TRUE);
|
|
|
|
NS_ASSERTION(overflowArea, "should have created rect");
|
|
if (overflowArea) {
|
|
*overflowArea = kidDesiredSize.mOverflowArea;
|
|
}
|
|
}
|
|
#ifdef DEBUG
|
|
if (nsBlockFrame::gNoisy) {
|
|
nsBlockFrame::gNoiseIndent--;
|
|
}
|
|
if (nsBlockFrame::gNoisyReflow) {
|
|
nsFrame::IndentBy(stdout,nsBlockFrame::gNoiseIndent);
|
|
printf("abs pos ");
|
|
if (nsnull != aKidFrame) {
|
|
nsIFrameDebug* frameDebug;
|
|
if (NS_SUCCEEDED(CallQueryInterface(aKidFrame, &frameDebug))) {
|
|
nsAutoString name;
|
|
frameDebug->GetFrameName(name);
|
|
printf("%s ", NS_LossyConvertUCS2toASCII(name).get());
|
|
}
|
|
}
|
|
printf("%p rect=%d,%d,%d,%d", aKidFrame, rect.x, rect.y, rect.width, rect.height);
|
|
printf("\n");
|
|
}
|
|
#endif
|
|
return rv;
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
void nsAbsoluteContainingBlock::PrettyUC(nscoord aSize,
|
|
char* aBuf)
|
|
{
|
|
if (NS_UNCONSTRAINEDSIZE == aSize) {
|
|
strcpy(aBuf, "UC");
|
|
}
|
|
else {
|
|
if(0xdeadbeef == aSize)
|
|
{
|
|
strcpy(aBuf, "deadbeef");
|
|
}
|
|
else {
|
|
sprintf(aBuf, "%d", aSize);
|
|
}
|
|
}
|
|
}
|
|
#endif
|