зеркало из https://github.com/mozilla/gecko-dev.git
1051 строка
35 KiB
C++
1051 строка
35 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: MPL 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 Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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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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* Pierre Phaneuf <pp@ludusdesign.com>
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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 of the GNU General Public License Version 2 or later (the "GPL"),
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* or 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 MPL, 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 MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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/* base class #1 for rendering objects that have child lists */
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#include "nsContainerFrame.h"
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#include "nsIContent.h"
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#include "nsIDocument.h"
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#include "nsPresContext.h"
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#include "nsIRenderingContext.h"
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#include "nsStyleContext.h"
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#include "nsRect.h"
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#include "nsPoint.h"
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#include "nsGUIEvent.h"
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#include "nsStyleConsts.h"
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#include "nsIView.h"
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#include "nsHTMLContainerFrame.h"
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#include "nsFrameManager.h"
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#include "nsIPresShell.h"
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#include "nsCOMPtr.h"
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#include "nsGkAtoms.h"
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#include "nsCSSAnonBoxes.h"
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#include "nsIViewManager.h"
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#include "nsIWidget.h"
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#include "nsGfxCIID.h"
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#include "nsIServiceManager.h"
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#include "nsCSSRendering.h"
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#include "nsTransform2D.h"
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#include "nsRegion.h"
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#include "nsLayoutErrors.h"
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#include "nsDisplayList.h"
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#include "nsContentErrors.h"
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#include "nsIEventStateManager.h"
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#ifdef NS_DEBUG
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#undef NOISY
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#else
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#undef NOISY
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#endif
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nsContainerFrame::~nsContainerFrame()
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{
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}
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NS_IMETHODIMP
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nsContainerFrame::Init(nsIContent* aContent,
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nsIFrame* aParent,
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nsIFrame* aPrevInFlow)
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{
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nsresult rv = nsSplittableFrame::Init(aContent, aParent, aPrevInFlow);
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if (aPrevInFlow) {
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// Make sure we copy bits from our prev-in-flow that will affect
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// us. A continuation for a container frame needs to know if it
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// has a child with a view so that we'll properly reposition it.
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if (aPrevInFlow->GetStateBits() & NS_FRAME_HAS_CHILD_WITH_VIEW)
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AddStateBits(NS_FRAME_HAS_CHILD_WITH_VIEW);
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}
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return rv;
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}
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NS_IMETHODIMP
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nsContainerFrame::SetInitialChildList(nsIAtom* aListName,
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nsIFrame* aChildList)
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{
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nsresult result;
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if (!mFrames.IsEmpty()) {
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// We already have child frames which means we've already been
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// initialized
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NS_NOTREACHED("unexpected second call to SetInitialChildList");
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result = NS_ERROR_UNEXPECTED;
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} else if (aListName) {
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// All we know about is the unnamed principal child list
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NS_NOTREACHED("unknown frame list");
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result = NS_ERROR_INVALID_ARG;
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} else {
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#ifdef NS_DEBUG
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nsFrame::VerifyDirtyBitSet(aChildList);
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#endif
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mFrames.SetFrames(aChildList);
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result = NS_OK;
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}
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return result;
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}
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NS_IMETHODIMP
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nsContainerFrame::AppendFrames(nsIAtom* aListName,
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nsIFrame* aFrameList)
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{
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if (nsnull != aListName) {
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#ifdef IBMBIDI
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if (aListName != nsGkAtoms::nextBidi)
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#endif
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{
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NS_ERROR("unexpected child list");
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return NS_ERROR_INVALID_ARG;
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}
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}
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if (aFrameList) {
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mFrames.AppendFrames(this, aFrameList);
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// Ask the parent frame to reflow me.
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#ifdef IBMBIDI
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if (nsnull == aListName)
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#endif
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{
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PresContext()->PresShell()->
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FrameNeedsReflow(this, nsIPresShell::eTreeChange, NS_FRAME_IS_DIRTY);
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}
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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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nsContainerFrame::InsertFrames(nsIAtom* aListName,
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nsIFrame* aPrevFrame,
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nsIFrame* aFrameList)
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{
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NS_ASSERTION(!aPrevFrame || aPrevFrame->GetParent() == this,
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"inserting after sibling frame with different parent");
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if (nsnull != aListName) {
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#ifdef IBMBIDI
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if (aListName != nsGkAtoms::nextBidi)
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#endif
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{
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NS_ERROR("unexpected child list");
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return NS_ERROR_INVALID_ARG;
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}
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}
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if (aFrameList) {
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// Insert frames after aPrevFrame
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mFrames.InsertFrames(this, aPrevFrame, aFrameList);
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#ifdef IBMBIDI
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if (nsnull == aListName)
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#endif
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{
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PresContext()->PresShell()->
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FrameNeedsReflow(this, nsIPresShell::eTreeChange, NS_FRAME_IS_DIRTY);
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}
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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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nsContainerFrame::RemoveFrame(nsIAtom* aListName,
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nsIFrame* aOldFrame)
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{
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if (nsnull != aListName) {
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#ifdef IBMBIDI
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if (nsGkAtoms::nextBidi != aListName)
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#endif
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{
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NS_ERROR("unexpected child list");
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return NS_ERROR_INVALID_ARG;
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}
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}
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if (aOldFrame) {
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// Loop and destroy the frame and all of its continuations.
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// If the frame we are removing is a brFrame, we need a reflow so
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// the line the brFrame was on can attempt to pull up any frames
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// that can fit from lines below it.
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PRBool generateReflowCommand =
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aOldFrame->GetType() == nsGkAtoms::brFrame;
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nsContainerFrame* parent = NS_STATIC_CAST(nsContainerFrame*, aOldFrame->GetParent());
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while (aOldFrame) {
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#ifdef IBMBIDI
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if (nsGkAtoms::nextBidi != aListName) {
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#endif
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// If the frame being removed has zero size then don't bother
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// generating a reflow command, otherwise make sure we do.
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nsRect bbox = aOldFrame->GetRect();
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if (bbox.width || bbox.height) {
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generateReflowCommand = PR_TRUE;
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}
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#ifdef IBMBIDI
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}
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#endif
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// When the parent is an inline frame we have a simple task - just
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// remove the frame from its parents list and generate a reflow
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// command.
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nsIFrame* oldFrameNextContinuation = aOldFrame->GetNextContinuation();
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parent->mFrames.DestroyFrame(aOldFrame);
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aOldFrame = oldFrameNextContinuation;
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if (aOldFrame) {
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parent = NS_STATIC_CAST(nsContainerFrame*, aOldFrame->GetParent());
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}
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}
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if (generateReflowCommand) {
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PresContext()->PresShell()->
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FrameNeedsReflow(this, nsIPresShell::eTreeChange, NS_FRAME_IS_DIRTY);
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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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nsContainerFrame::CleanupGeneratedContentIn(nsIContent* aRealContent,
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nsIFrame* aRoot) {
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nsIAtom* frameList = nsnull;
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PRInt32 listIndex = 0;
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do {
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nsIFrame* child = aRoot->GetFirstChild(frameList);
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while (child) {
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nsIContent* content = child->GetContent();
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if (content && content != aRealContent) {
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// Tell the ESM that this content is going away now, so it'll update
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// its hover content, etc.
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aRoot->PresContext()->EventStateManager()->ContentRemoved(content);
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content->UnbindFromTree();
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}
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CleanupGeneratedContentIn(aRealContent, child);
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child = child->GetNextSibling();
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}
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frameList = aRoot->GetAdditionalChildListName(listIndex++);
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} while (frameList);
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}
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void
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nsContainerFrame::Destroy()
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{
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// Prevent event dispatch during destruction
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if (HasView()) {
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GetView()->SetClientData(nsnull);
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}
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// Delete the primary child list
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mFrames.DestroyFrames();
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// Destroy overflow frames now
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nsFrameList overflowFrames(GetOverflowFrames(PresContext(), PR_TRUE));
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overflowFrames.DestroyFrames();
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// Destroy the frame and remove the flow pointers
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nsSplittableFrame::Destroy();
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}
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/////////////////////////////////////////////////////////////////////////////
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// Child frame enumeration
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nsIFrame*
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nsContainerFrame::GetFirstChild(nsIAtom* aListName) const
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{
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// We only know about the unnamed principal child list and the overflow
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// list
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if (nsnull == aListName) {
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return mFrames.FirstChild();
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} else if (nsGkAtoms::overflowList == aListName) {
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return GetOverflowFrames(PresContext(), PR_FALSE);
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} else {
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return nsnull;
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}
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}
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nsIAtom*
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nsContainerFrame::GetAdditionalChildListName(PRInt32 aIndex) const
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{
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if (aIndex == 0) {
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return nsGkAtoms::overflowList;
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} else {
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return nsnull;
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}
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}
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/////////////////////////////////////////////////////////////////////////////
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// Painting/Events
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NS_IMETHODIMP
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nsContainerFrame::BuildDisplayList(nsDisplayListBuilder* aBuilder,
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const nsRect& aDirtyRect,
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const nsDisplayListSet& aLists)
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{
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nsresult rv = DisplayBorderBackgroundOutline(aBuilder, aLists);
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NS_ENSURE_SUCCESS(rv, rv);
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return BuildDisplayListForNonBlockChildren(aBuilder, aDirtyRect, aLists);
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}
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nsresult
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nsContainerFrame::BuildDisplayListForNonBlockChildren(nsDisplayListBuilder* aBuilder,
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const nsRect& aDirtyRect,
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const nsDisplayListSet& aLists,
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PRUint32 aFlags)
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{
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nsIFrame* kid = mFrames.FirstChild();
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// Put each child's background directly onto the content list
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nsDisplayListSet set(aLists, aLists.Content());
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// The children should be in content order
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while (kid) {
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nsresult rv = BuildDisplayListForChild(aBuilder, kid, aDirtyRect, set, aFlags);
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NS_ENSURE_SUCCESS(rv, rv);
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kid = kid->GetNextSibling();
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}
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return NS_OK;
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}
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/* virtual */ void
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nsContainerFrame::ChildIsDirty(nsIFrame* aChild)
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{
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AddStateBits(NS_FRAME_HAS_DIRTY_CHILDREN);
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}
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PRBool
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nsContainerFrame::IsLeaf() const
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{
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return PR_FALSE;
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}
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PRBool
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nsContainerFrame::PeekOffsetNoAmount(PRBool aForward, PRInt32* aOffset)
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{
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NS_ASSERTION (aOffset && *aOffset <= 1, "aOffset out of range");
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// Don't allow the caret to stay in an empty (leaf) container frame.
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return PR_FALSE;
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}
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PRBool
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nsContainerFrame::PeekOffsetCharacter(PRBool aForward, PRInt32* aOffset)
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{
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NS_ASSERTION (aOffset && *aOffset <= 1, "aOffset out of range");
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// Don't allow the caret to stay in an empty (leaf) container frame.
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return PR_FALSE;
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}
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/////////////////////////////////////////////////////////////////////////////
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// Helper member functions
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/**
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* Position the view associated with |aKidFrame|, if there is one. A
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* container frame should call this method after positioning a frame,
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* but before |Reflow|.
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*/
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void
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nsContainerFrame::PositionFrameView(nsIFrame* aKidFrame)
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{
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nsIFrame* parentFrame = aKidFrame->GetParent();
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if (!aKidFrame->HasView() || !parentFrame)
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return;
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nsIView* view = aKidFrame->GetView();
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nsIViewManager* vm = view->GetViewManager();
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nsPoint pt;
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nsIView* ancestorView = parentFrame->GetClosestView(&pt);
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if (ancestorView != view->GetParent()) {
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NS_ASSERTION(ancestorView == view->GetParent()->GetParent(),
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"Allowed only one anonymous view between frames");
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// parentFrame is responsible for positioning aKidFrame's view
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// explicitly
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return;
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}
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pt += aKidFrame->GetPosition();
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vm->MoveViewTo(view, pt.x, pt.y);
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}
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static void
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SyncFrameViewGeometryDependentProperties(nsPresContext* aPresContext,
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nsIFrame* aFrame,
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nsStyleContext* aStyleContext,
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nsIView* aView,
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PRUint32 aFlags)
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{
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nsIViewManager* vm = aView->GetViewManager();
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PRBool isCanvas;
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const nsStyleBackground* bg;
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PRBool hasBG =
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nsCSSRendering::FindBackground(aPresContext, aFrame, &bg, &isCanvas);
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if (isCanvas) {
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nsIView* rootView;
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vm->GetRootView(rootView);
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nsIView* rootParent = rootView->GetParent();
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nsIDocument *doc = aPresContext->PresShell()->GetDocument();
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if (doc) {
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nsIContent *rootElem = doc->GetRootContent();
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if (!doc->GetParentDocument() &&
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(nsCOMPtr<nsISupports>(doc->GetContainer())) &&
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rootElem && rootElem->IsNodeOfType(nsINode::eXUL)) {
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// we're XUL at the root of the document hierarchy. Try to make our
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// window translucent.
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// don't proceed unless this is the root view
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// (sometimes the non-root-view is a canvas)
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if (aView->HasWidget() && aView == rootView) {
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aView->GetWidget()->SetWindowTranslucency(nsLayoutUtils::FrameHasTransparency(aFrame));
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}
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}
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}
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}
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}
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void
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nsContainerFrame::SyncFrameViewAfterReflow(nsPresContext* aPresContext,
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nsIFrame* aFrame,
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nsIView* aView,
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const nsRect* aCombinedArea,
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PRUint32 aFlags)
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{
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if (!aView) {
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return;
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}
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NS_ASSERTION(aCombinedArea, "Combined area must be passed in now");
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// Make sure the view is sized and positioned correctly
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if (0 == (aFlags & NS_FRAME_NO_MOVE_VIEW)) {
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PositionFrameView(aFrame);
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}
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if (0 == (aFlags & NS_FRAME_NO_SIZE_VIEW)) {
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nsIViewManager* vm = aView->GetViewManager();
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vm->ResizeView(aView, *aCombinedArea, PR_TRUE);
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// Even if the size hasn't changed, we need to sync up the
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// geometry dependent properties, because (kidState &
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// NS_FRAME_OUTSIDE_CHILDREN) might have changed, and we can't
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// detect whether it has or not. Likewise, whether the view size
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// has changed or not, we may need to change the transparency
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// state even if there is no clip.
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nsStyleContext* savedStyleContext = aFrame->GetStyleContext();
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SyncFrameViewGeometryDependentProperties(aPresContext, aFrame, savedStyleContext, aView, aFlags);
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}
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}
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void
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nsContainerFrame::SyncFrameViewProperties(nsPresContext* aPresContext,
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nsIFrame* aFrame,
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nsStyleContext* aStyleContext,
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nsIView* aView,
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PRUint32 aFlags)
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{
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NS_ASSERTION(!aStyleContext || aFrame->GetStyleContext() == aStyleContext,
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"Wrong style context for frame?");
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if (!aView) {
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return;
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}
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nsIViewManager* vm = aView->GetViewManager();
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if (nsnull == aStyleContext) {
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aStyleContext = aFrame->GetStyleContext();
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}
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// Make sure visibility is correct
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if (0 == (aFlags & NS_FRAME_NO_VISIBILITY)) {
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// See if the view should be hidden or visible
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PRBool viewIsVisible = PR_TRUE;
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if (!aStyleContext->GetStyleVisibility()->IsVisible() &&
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!aFrame->SupportsVisibilityHidden()) {
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// If it's a scrollable frame that can't hide its scrollbars,
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// hide the view. This means that child elements can't override
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// their parent's visibility, but it's not practical to leave it
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// visible in all cases because the scrollbars will be showing
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// XXXldb Does the view system really enforce this correctly?
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viewIsVisible = PR_FALSE;
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} else {
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// if the view is for a popup, don't show the view if the popup is closed
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nsIWidget* widget = aView->GetWidget();
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if (widget) {
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nsWindowType windowType;
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widget->GetWindowType(windowType);
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if (windowType == eWindowType_popup) {
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widget->IsVisible(viewIsVisible);
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}
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}
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}
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vm->SetViewVisibility(aView, viewIsVisible ? nsViewVisibility_kShow :
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nsViewVisibility_kHide);
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}
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// See if the frame is being relatively positioned or absolutely
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// positioned
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PRBool isPositioned = aStyleContext->GetStyleDisplay()->IsPositioned();
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PRInt32 zIndex = 0;
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PRBool autoZIndex = PR_FALSE;
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if (!isPositioned) {
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autoZIndex = PR_TRUE;
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|
} else {
|
|
// Make sure z-index is correct
|
|
const nsStylePosition* position = aStyleContext->GetStylePosition();
|
|
|
|
if (position->mZIndex.GetUnit() == eStyleUnit_Integer) {
|
|
zIndex = position->mZIndex.GetIntValue();
|
|
} else if (position->mZIndex.GetUnit() == eStyleUnit_Auto) {
|
|
autoZIndex = PR_TRUE;
|
|
}
|
|
}
|
|
|
|
vm->SetViewZIndex(aView, autoZIndex, zIndex, isPositioned);
|
|
|
|
SyncFrameViewGeometryDependentProperties(aPresContext, aFrame, aStyleContext, aView, aFlags);
|
|
}
|
|
|
|
PRBool
|
|
nsContainerFrame::FrameNeedsView(nsIFrame* aFrame)
|
|
{
|
|
// XXX Check needed because frame construction can't properly figure out when
|
|
// a frame is the child of a scrollframe
|
|
if (aFrame->GetStyleContext()->GetPseudoType() ==
|
|
nsCSSAnonBoxes::scrolledContent) {
|
|
return PR_TRUE;
|
|
}
|
|
return aFrame->NeedsView();
|
|
}
|
|
|
|
static nscoord GetCoord(const nsStyleCoord& aCoord, nscoord aIfNotCoord)
|
|
{
|
|
return aCoord.GetUnit() == eStyleUnit_Coord
|
|
? aCoord.GetCoordValue()
|
|
: aIfNotCoord;
|
|
}
|
|
|
|
void
|
|
nsContainerFrame::DoInlineIntrinsicWidth(nsIRenderingContext *aRenderingContext,
|
|
InlineIntrinsicWidthData *aData,
|
|
nsLayoutUtils::IntrinsicWidthType aType)
|
|
{
|
|
if (GetPrevInFlow())
|
|
return; // Already added.
|
|
|
|
NS_PRECONDITION(aType == nsLayoutUtils::MIN_WIDTH ||
|
|
aType == nsLayoutUtils::PREF_WIDTH, "bad type");
|
|
|
|
PRUint8 startSide, endSide;
|
|
if (GetStyleVisibility()->mDirection == NS_STYLE_DIRECTION_LTR) {
|
|
startSide = NS_SIDE_LEFT;
|
|
endSide = NS_SIDE_RIGHT;
|
|
} else {
|
|
startSide = NS_SIDE_RIGHT;
|
|
endSide = NS_SIDE_LEFT;
|
|
}
|
|
|
|
const nsStylePadding *stylePadding = GetStylePadding();
|
|
const nsStyleBorder *styleBorder = GetStyleBorder();
|
|
const nsStyleMargin *styleMargin = GetStyleMargin();
|
|
nsStyleCoord tmp;
|
|
|
|
// This goes at the beginning no matter how things are broken and how
|
|
// messy the bidi situations are, since per CSS2.1 section 8.6
|
|
// (implemented in bug 328168), the startSide border is always on the
|
|
// first line.
|
|
aData->currentLine +=
|
|
GetCoord(stylePadding->mPadding.Get(startSide, tmp), 0) +
|
|
styleBorder->GetBorderWidth(startSide) +
|
|
GetCoord(styleMargin->mMargin.Get(startSide, tmp), 0);
|
|
|
|
for (nsContainerFrame *nif = this; nif;
|
|
nif = (nsContainerFrame*) nif->GetNextInFlow()) {
|
|
for (nsIFrame *kid = nif->mFrames.FirstChild(); kid;
|
|
kid = kid->GetNextSibling()) {
|
|
if (aType == nsLayoutUtils::MIN_WIDTH)
|
|
kid->AddInlineMinWidth(aRenderingContext,
|
|
NS_STATIC_CAST(InlineMinWidthData*, aData));
|
|
else
|
|
kid->AddInlinePrefWidth(aRenderingContext,
|
|
NS_STATIC_CAST(InlinePrefWidthData*, aData));
|
|
}
|
|
}
|
|
|
|
// This goes at the end no matter how things are broken and how
|
|
// messy the bidi situations are, since per CSS2.1 section 8.6
|
|
// (implemented in bug 328168), the endSide border is always on the
|
|
// last line.
|
|
aData->currentLine +=
|
|
GetCoord(stylePadding->mPadding.Get(endSide, tmp), 0) +
|
|
styleBorder->GetBorderWidth(endSide) +
|
|
GetCoord(styleMargin->mMargin.Get(endSide, tmp), 0);
|
|
}
|
|
|
|
/* virtual */ nsSize
|
|
nsContainerFrame::ComputeAutoSize(nsIRenderingContext *aRenderingContext,
|
|
nsSize aCBSize, nscoord aAvailableWidth,
|
|
nsSize aMargin, nsSize aBorder,
|
|
nsSize aPadding, PRBool aShrinkWrap)
|
|
{
|
|
nsSize result(0xdeadbeef, NS_UNCONSTRAINEDSIZE);
|
|
nscoord availBased = aAvailableWidth - aMargin.width - aBorder.width -
|
|
aPadding.width;
|
|
// replaced elements always shrink-wrap
|
|
if (aShrinkWrap || IsFrameOfType(eReplaced)) {
|
|
// don't bother setting it if the result won't be used
|
|
if (GetStylePosition()->mWidth.GetUnit() == eStyleUnit_Auto) {
|
|
result.width = ShrinkWidthToFit(aRenderingContext, availBased);
|
|
}
|
|
} else {
|
|
result.width = availBased;
|
|
}
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* Invokes the WillReflow() function, positions the frame and its view (if
|
|
* requested), and then calls Reflow(). If the reflow succeeds and the child
|
|
* frame is complete, deletes any next-in-flows using DeleteNextInFlowChild()
|
|
*/
|
|
nsresult
|
|
nsContainerFrame::ReflowChild(nsIFrame* aKidFrame,
|
|
nsPresContext* aPresContext,
|
|
nsHTMLReflowMetrics& aDesiredSize,
|
|
const nsHTMLReflowState& aReflowState,
|
|
nscoord aX,
|
|
nscoord aY,
|
|
PRUint32 aFlags,
|
|
nsReflowStatus& aStatus)
|
|
{
|
|
NS_PRECONDITION(aReflowState.frame == aKidFrame, "bad reflow state");
|
|
|
|
nsresult result;
|
|
|
|
// Send the WillReflow() notification, and position the child frame
|
|
// and its view if requested
|
|
aKidFrame->WillReflow(aPresContext);
|
|
|
|
if (0 == (aFlags & NS_FRAME_NO_MOVE_FRAME)) {
|
|
aKidFrame->SetPosition(nsPoint(aX, aY));
|
|
}
|
|
|
|
if (0 == (aFlags & NS_FRAME_NO_MOVE_VIEW)) {
|
|
PositionFrameView(aKidFrame);
|
|
}
|
|
|
|
// Reflow the child frame
|
|
result = aKidFrame->Reflow(aPresContext, aDesiredSize, aReflowState,
|
|
aStatus);
|
|
|
|
// If the reflow was successful and the child frame is complete, delete any
|
|
// next-in-flows
|
|
if (NS_SUCCEEDED(result) && NS_FRAME_IS_COMPLETE(aStatus)) {
|
|
nsIFrame* kidNextInFlow = aKidFrame->GetNextInFlow();
|
|
if (nsnull != kidNextInFlow) {
|
|
// Remove all of the childs next-in-flows. Make sure that we ask
|
|
// the right parent to do the removal (it's possible that the
|
|
// parent is not this because we are executing pullup code)
|
|
NS_STATIC_CAST(nsContainerFrame*, kidNextInFlow->GetParent())
|
|
->DeleteNextInFlowChild(aPresContext, kidNextInFlow);
|
|
}
|
|
}
|
|
return result;
|
|
}
|
|
|
|
|
|
/**
|
|
* Position the views of |aFrame|'s descendants. A container frame
|
|
* should call this method if it moves a frame after |Reflow|.
|
|
*/
|
|
void
|
|
nsContainerFrame::PositionChildViews(nsIFrame* aFrame)
|
|
{
|
|
if (!(aFrame->GetStateBits() & NS_FRAME_HAS_CHILD_WITH_VIEW)) {
|
|
return;
|
|
}
|
|
|
|
nsIAtom* childListName = nsnull;
|
|
PRInt32 childListIndex = 0;
|
|
|
|
do {
|
|
// Recursively walk aFrame's child frames
|
|
nsIFrame* childFrame = aFrame->GetFirstChild(childListName);
|
|
while (childFrame) {
|
|
// Position the frame's view (if it has one) otherwise recursively
|
|
// process its children
|
|
if (childFrame->HasView()) {
|
|
PositionFrameView(childFrame);
|
|
} else {
|
|
PositionChildViews(childFrame);
|
|
}
|
|
|
|
// Get the next sibling child frame
|
|
childFrame = childFrame->GetNextSibling();
|
|
}
|
|
|
|
childListName = aFrame->GetAdditionalChildListName(childListIndex++);
|
|
} while (childListName);
|
|
}
|
|
|
|
/**
|
|
* The second half of frame reflow. Does the following:
|
|
* - sets the frame's bounds
|
|
* - sizes and positions (if requested) the frame's view. If the frame's final
|
|
* position differs from the current position and the frame itself does not
|
|
* have a view, then any child frames with views are positioned so they stay
|
|
* in sync
|
|
* - sets the view's visibility, opacity, content transparency, and clip
|
|
* - invoked the DidReflow() function
|
|
*
|
|
* Flags:
|
|
* NS_FRAME_NO_MOVE_FRAME - don't move the frame. aX and aY are ignored in this
|
|
* case. Also implies NS_FRAME_NO_MOVE_VIEW
|
|
* NS_FRAME_NO_MOVE_VIEW - don't position the frame's view. Set this if you
|
|
* don't want to automatically sync the frame and view
|
|
* NS_FRAME_NO_SIZE_VIEW - don't size the frame's view
|
|
*/
|
|
nsresult
|
|
nsContainerFrame::FinishReflowChild(nsIFrame* aKidFrame,
|
|
nsPresContext* aPresContext,
|
|
const nsHTMLReflowState* aReflowState,
|
|
nsHTMLReflowMetrics& aDesiredSize,
|
|
nscoord aX,
|
|
nscoord aY,
|
|
PRUint32 aFlags)
|
|
{
|
|
nsPoint curOrigin = aKidFrame->GetPosition();
|
|
nsRect bounds(aX, aY, aDesiredSize.width, aDesiredSize.height);
|
|
|
|
aKidFrame->SetRect(bounds);
|
|
|
|
if (aKidFrame->HasView()) {
|
|
nsIView* view = aKidFrame->GetView();
|
|
// Make sure the frame's view is properly sized and positioned and has
|
|
// things like opacity correct
|
|
SyncFrameViewAfterReflow(aPresContext, aKidFrame, view,
|
|
&aDesiredSize.mOverflowArea,
|
|
aFlags);
|
|
}
|
|
|
|
if (!(aFlags & NS_FRAME_NO_MOVE_VIEW) &&
|
|
(curOrigin.x != aX || curOrigin.y != aY)) {
|
|
if (!aKidFrame->HasView()) {
|
|
// If the frame has moved, then we need to make sure any child views are
|
|
// correctly positioned
|
|
PositionChildViews(aKidFrame);
|
|
}
|
|
|
|
// We also need to redraw everything associated with the frame
|
|
// because if the frame's Reflow issued any invalidates, then they
|
|
// will be at the wrong offset ... note that this includes
|
|
// invalidates issued against the frame's children, so we need to
|
|
// invalidate the overflow area too.
|
|
aKidFrame->Invalidate(aDesiredSize.mOverflowArea);
|
|
}
|
|
|
|
return aKidFrame->DidReflow(aPresContext, aReflowState, NS_FRAME_REFLOW_FINISHED);
|
|
}
|
|
|
|
/**
|
|
* Remove and delete aNextInFlow and its next-in-flows. Updates the sibling and flow
|
|
* pointers
|
|
*/
|
|
void
|
|
nsContainerFrame::DeleteNextInFlowChild(nsPresContext* aPresContext,
|
|
nsIFrame* aNextInFlow)
|
|
{
|
|
nsIFrame* prevInFlow = aNextInFlow->GetPrevInFlow();
|
|
NS_PRECONDITION(prevInFlow, "bad prev-in-flow");
|
|
|
|
// If the next-in-flow has a next-in-flow then delete it, too (and
|
|
// delete it first).
|
|
// Do this in a loop so we don't overflow the stack for frames
|
|
// with very many next-in-flows
|
|
nsIFrame* nextNextInFlow = aNextInFlow->GetNextInFlow();
|
|
if (nextNextInFlow) {
|
|
nsAutoVoidArray frames;
|
|
for (nsIFrame* f = nextNextInFlow; f; f = f->GetNextInFlow()) {
|
|
frames.AppendElement(f);
|
|
}
|
|
for (PRInt32 i = frames.Count() - 1; i >= 0; --i) {
|
|
nsIFrame* delFrame = NS_STATIC_CAST(nsIFrame*, frames.ElementAt(i));
|
|
NS_STATIC_CAST(nsContainerFrame*, delFrame->GetParent())
|
|
->DeleteNextInFlowChild(aPresContext, delFrame);
|
|
}
|
|
}
|
|
|
|
// Disconnect the next-in-flow from the flow list
|
|
nsSplittableFrame::BreakFromPrevFlow(aNextInFlow);
|
|
|
|
// Take the next-in-flow out of the parent's child list
|
|
PRBool result = mFrames.RemoveFrame(aNextInFlow);
|
|
if (!result) {
|
|
// We didn't find the child in the parent's principal child list.
|
|
// Maybe it's on the overflow list?
|
|
nsFrameList overflowFrames(GetOverflowFrames(aPresContext, PR_TRUE));
|
|
|
|
if (overflowFrames.IsEmpty() || !overflowFrames.RemoveFrame(aNextInFlow)) {
|
|
NS_ASSERTION(result, "failed to remove frame");
|
|
}
|
|
|
|
// Set the overflow property again
|
|
if (overflowFrames.NotEmpty()) {
|
|
SetOverflowFrames(aPresContext, overflowFrames.FirstChild());
|
|
}
|
|
}
|
|
|
|
// Delete the next-in-flow frame and its descendants.
|
|
aNextInFlow->Destroy();
|
|
|
|
NS_POSTCONDITION(!prevInFlow->GetNextInFlow(), "non null next-in-flow");
|
|
}
|
|
|
|
nsIFrame*
|
|
nsContainerFrame::GetOverflowFrames(nsPresContext* aPresContext,
|
|
PRBool aRemoveProperty) const
|
|
{
|
|
nsPropertyTable *propTable = aPresContext->PropertyTable();
|
|
if (aRemoveProperty) {
|
|
return (nsIFrame*) propTable->UnsetProperty(this,
|
|
nsGkAtoms::overflowProperty);
|
|
}
|
|
|
|
return (nsIFrame*) propTable->GetProperty(this,
|
|
nsGkAtoms::overflowProperty);
|
|
}
|
|
|
|
// Destructor function for the overflow frame property
|
|
static void
|
|
DestroyOverflowFrames(void* aFrame,
|
|
nsIAtom* aPropertyName,
|
|
void* aPropertyValue,
|
|
void* aDtorData)
|
|
{
|
|
if (aPropertyValue) {
|
|
nsFrameList frames((nsIFrame*)aPropertyValue);
|
|
|
|
frames.DestroyFrames();
|
|
}
|
|
}
|
|
|
|
nsresult
|
|
nsContainerFrame::SetOverflowFrames(nsPresContext* aPresContext,
|
|
nsIFrame* aOverflowFrames)
|
|
{
|
|
nsresult rv =
|
|
aPresContext->PropertyTable()->SetProperty(this,
|
|
nsGkAtoms::overflowProperty,
|
|
aOverflowFrames,
|
|
DestroyOverflowFrames,
|
|
nsnull);
|
|
|
|
// Verify that we didn't overwrite an existing overflow list
|
|
NS_ASSERTION(rv != NS_PROPTABLE_PROP_OVERWRITTEN, "existing overflow list");
|
|
|
|
return rv;
|
|
}
|
|
|
|
/**
|
|
* Push aFromChild and its next siblings to the next-in-flow. Change the
|
|
* geometric parent of each frame that's pushed. If there is no next-in-flow
|
|
* the frames are placed on the overflow list (and the geometric parent is
|
|
* left unchanged).
|
|
*
|
|
* Updates the next-in-flow's child count. Does <b>not</b> update the
|
|
* pusher's child count.
|
|
*
|
|
* @param aFromChild the first child frame to push. It is disconnected from
|
|
* aPrevSibling
|
|
* @param aPrevSibling aFromChild's previous sibling. Must not be null. It's
|
|
* an error to push a parent's first child frame
|
|
*/
|
|
void
|
|
nsContainerFrame::PushChildren(nsPresContext* aPresContext,
|
|
nsIFrame* aFromChild,
|
|
nsIFrame* aPrevSibling)
|
|
{
|
|
NS_PRECONDITION(nsnull != aFromChild, "null pointer");
|
|
NS_PRECONDITION(nsnull != aPrevSibling, "pushing first child");
|
|
NS_PRECONDITION(aPrevSibling->GetNextSibling() == aFromChild, "bad prev sibling");
|
|
|
|
// Disconnect aFromChild from its previous sibling
|
|
aPrevSibling->SetNextSibling(nsnull);
|
|
|
|
if (nsnull != GetNextInFlow()) {
|
|
// XXX This is not a very good thing to do. If it gets removed
|
|
// then remove the copy of this routine that doesn't do this from
|
|
// nsInlineFrame.
|
|
nsContainerFrame* nextInFlow = (nsContainerFrame*)GetNextInFlow();
|
|
// When pushing and pulling frames we need to check for whether any
|
|
// views need to be reparented.
|
|
for (nsIFrame* f = aFromChild; f; f = f->GetNextSibling()) {
|
|
nsHTMLContainerFrame::ReparentFrameView(aPresContext, f, this, nextInFlow);
|
|
}
|
|
nextInFlow->mFrames.InsertFrames(nextInFlow, nsnull, aFromChild);
|
|
}
|
|
else {
|
|
// Add the frames to our overflow list
|
|
SetOverflowFrames(aPresContext, aFromChild);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Moves any frames on the overflow lists (the prev-in-flow's overflow list and
|
|
* the receiver's overflow list) to the child list.
|
|
*
|
|
* Updates this frame's child count and content mapping.
|
|
*
|
|
* @return PR_TRUE if any frames were moved and PR_FALSE otherwise
|
|
*/
|
|
PRBool
|
|
nsContainerFrame::MoveOverflowToChildList(nsPresContext* aPresContext)
|
|
{
|
|
PRBool result = PR_FALSE;
|
|
|
|
// Check for an overflow list with our prev-in-flow
|
|
nsContainerFrame* prevInFlow = (nsContainerFrame*)GetPrevInFlow();
|
|
if (nsnull != prevInFlow) {
|
|
nsIFrame* prevOverflowFrames = prevInFlow->GetOverflowFrames(aPresContext,
|
|
PR_TRUE);
|
|
if (prevOverflowFrames) {
|
|
NS_ASSERTION(mFrames.IsEmpty(), "bad overflow list");
|
|
// When pushing and pulling frames we need to check for whether any
|
|
// views need to be reparented.
|
|
for (nsIFrame* f = prevOverflowFrames; f; f = f->GetNextSibling()) {
|
|
nsHTMLContainerFrame::ReparentFrameView(aPresContext, f, prevInFlow, this);
|
|
}
|
|
mFrames.InsertFrames(this, nsnull, prevOverflowFrames);
|
|
result = PR_TRUE;
|
|
}
|
|
}
|
|
|
|
// It's also possible that we have an overflow list for ourselves
|
|
nsIFrame* overflowFrames = GetOverflowFrames(aPresContext, PR_TRUE);
|
|
if (overflowFrames) {
|
|
NS_ASSERTION(mFrames.NotEmpty(), "overflow list w/o frames");
|
|
mFrames.AppendFrames(nsnull, overflowFrames);
|
|
result = PR_TRUE;
|
|
}
|
|
return result;
|
|
}
|
|
|
|
/////////////////////////////////////////////////////////////////////////////
|
|
// Debugging
|
|
|
|
#ifdef NS_DEBUG
|
|
NS_IMETHODIMP
|
|
nsContainerFrame::List(FILE* out, PRInt32 aIndent) const
|
|
{
|
|
IndentBy(out, aIndent);
|
|
ListTag(out);
|
|
#ifdef DEBUG_waterson
|
|
fprintf(out, " [parent=%p]", NS_STATIC_CAST(void*, mParent));
|
|
#endif
|
|
if (HasView()) {
|
|
fprintf(out, " [view=%p]", NS_STATIC_CAST(void*, GetView()));
|
|
}
|
|
if (nsnull != mNextSibling) {
|
|
fprintf(out, " next=%p", NS_STATIC_CAST(void*, mNextSibling));
|
|
}
|
|
if (nsnull != GetPrevContinuation()) {
|
|
fprintf(out, " prev-continuation=%p", NS_STATIC_CAST(void*, GetPrevContinuation()));
|
|
}
|
|
if (nsnull != GetNextContinuation()) {
|
|
fprintf(out, " next-continuation=%p", NS_STATIC_CAST(void*, GetNextContinuation()));
|
|
}
|
|
fprintf(out, " {%d,%d,%d,%d}", mRect.x, mRect.y, mRect.width, mRect.height);
|
|
if (0 != mState) {
|
|
fprintf(out, " [state=%08x]", mState);
|
|
}
|
|
fprintf(out, " [content=%p]", NS_STATIC_CAST(void*, mContent));
|
|
nsContainerFrame* f = NS_CONST_CAST(nsContainerFrame*, this);
|
|
nsRect* overflowArea = f->GetOverflowAreaProperty(PR_FALSE);
|
|
if (overflowArea) {
|
|
fprintf(out, " [overflow=%d,%d,%d,%d]", overflowArea->x, overflowArea->y,
|
|
overflowArea->width, overflowArea->height);
|
|
}
|
|
fprintf(out, " [sc=%p]", NS_STATIC_CAST(void*, mStyleContext));
|
|
nsIAtom* pseudoTag = mStyleContext->GetPseudoType();
|
|
if (pseudoTag) {
|
|
nsAutoString atomString;
|
|
pseudoTag->ToString(atomString);
|
|
fprintf(out, " pst=%s",
|
|
NS_LossyConvertUTF16toASCII(atomString).get());
|
|
}
|
|
|
|
// Output the children
|
|
nsIAtom* listName = nsnull;
|
|
PRInt32 listIndex = 0;
|
|
PRBool outputOneList = PR_FALSE;
|
|
do {
|
|
nsIFrame* kid = GetFirstChild(listName);
|
|
if (nsnull != kid) {
|
|
if (outputOneList) {
|
|
IndentBy(out, aIndent);
|
|
}
|
|
outputOneList = PR_TRUE;
|
|
nsAutoString tmp;
|
|
if (nsnull != listName) {
|
|
listName->ToString(tmp);
|
|
fputs(NS_LossyConvertUTF16toASCII(tmp).get(), out);
|
|
}
|
|
fputs("<\n", out);
|
|
while (nsnull != kid) {
|
|
// Verify the child frame's parent frame pointer is correct
|
|
NS_ASSERTION(kid->GetParent() == (nsIFrame*)this, "bad parent frame pointer");
|
|
|
|
// Have the child frame list
|
|
nsIFrameDebug* frameDebug;
|
|
if (NS_SUCCEEDED(kid->QueryInterface(NS_GET_IID(nsIFrameDebug), (void**)&frameDebug))) {
|
|
frameDebug->List(out, aIndent + 1);
|
|
}
|
|
kid = kid->GetNextSibling();
|
|
}
|
|
IndentBy(out, aIndent);
|
|
fputs(">\n", out);
|
|
}
|
|
listName = GetAdditionalChildListName(listIndex++);
|
|
} while(nsnull != listName);
|
|
|
|
if (!outputOneList) {
|
|
fputs("<>\n", out);
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
#endif
|