mirror of
https://gitlab.winehq.org/wine/wine-gecko.git
synced 2024-09-13 09:24:08 -07:00
561 lines
23 KiB
C++
561 lines
23 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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*
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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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/*
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* code for managing absolutely positioned children of a rendering
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* object that is a containing block for them
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*/
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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 "nsIPresShell.h"
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#include "nsHTMLContainerFrame.h"
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#include "nsHTMLParts.h"
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#include "nsPresContext.h"
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#include "nsFrameManager.h"
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#include "nsCSSFrameConstructor.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::SetInitialChildList(nsIFrame* aDelegatingFrame,
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nsIAtom* aListName,
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nsFrameList& 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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nsIAtom* aListName,
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nsFrameList& aFrameList)
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{
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NS_ASSERTION(GetChildListName() == aListName, "unexpected child list");
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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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// no damage to intrinsic widths, since absolutely positioned frames can't
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// change them
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aDelegatingFrame->PresContext()->PresShell()->
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FrameNeedsReflow(aDelegatingFrame, nsIPresShell::eResize,
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NS_FRAME_HAS_DIRTY_CHILDREN);
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return NS_OK;
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}
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nsresult
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nsAbsoluteContainingBlock::InsertFrames(nsIFrame* aDelegatingFrame,
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nsIAtom* aListName,
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nsIFrame* aPrevFrame,
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nsFrameList& aFrameList)
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{
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NS_ASSERTION(GetChildListName() == aListName, "unexpected child list");
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NS_ASSERTION(!aPrevFrame || aPrevFrame->GetParent() == aDelegatingFrame,
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"inserting after sibling frame with different parent");
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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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// no damage to intrinsic widths, since absolutely positioned frames can't
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// change them
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aDelegatingFrame->PresContext()->PresShell()->
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FrameNeedsReflow(aDelegatingFrame, nsIPresShell::eResize,
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NS_FRAME_HAS_DIRTY_CHILDREN);
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return NS_OK;
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}
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void
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nsAbsoluteContainingBlock::RemoveFrame(nsIFrame* aDelegatingFrame,
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nsIAtom* aListName,
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nsIFrame* aOldFrame)
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{
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NS_ASSERTION(GetChildListName() == aListName, "unexpected child list");
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nsIFrame* nif = aOldFrame->GetNextInFlow();
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if (nif) {
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static_cast<nsContainerFrame*>(nif->GetParent())
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->DeleteNextInFlowChild(aOldFrame->PresContext(), nif, PR_FALSE);
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}
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mAbsoluteFrames.DestroyFrame(aOldFrame);
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}
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nsresult
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nsAbsoluteContainingBlock::Reflow(nsContainerFrame* aDelegatingFrame,
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nsPresContext* aPresContext,
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const nsHTMLReflowState& aReflowState,
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nsReflowStatus& aReflowStatus,
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nscoord aContainingBlockWidth,
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nscoord aContainingBlockHeight,
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PRBool aConstrainHeight,
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PRBool aCBWidthChanged,
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PRBool aCBHeightChanged,
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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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nsReflowStatus reflowStatus = NS_FRAME_COMPLETE;
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PRBool reflowAll = aReflowState.ShouldReflowAllKids();
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nsIFrame* kidFrame;
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nsOverflowContinuationTracker tracker(aPresContext, aDelegatingFrame, PR_TRUE);
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for (kidFrame = mAbsoluteFrames.FirstChild(); kidFrame; kidFrame = kidFrame->GetNextSibling()) {
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PRBool kidNeedsReflow = reflowAll || NS_SUBTREE_DIRTY(kidFrame) ||
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FrameDependsOnContainer(kidFrame, aCBWidthChanged, aCBHeightChanged);
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if (kidNeedsReflow && !aPresContext->HasPendingInterrupt()) {
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// Reflow the frame
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nsReflowStatus kidStatus = NS_FRAME_COMPLETE;
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ReflowAbsoluteFrame(aDelegatingFrame, aPresContext, aReflowState,
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aContainingBlockWidth, aContainingBlockHeight,
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aConstrainHeight, kidFrame, kidStatus, aChildBounds);
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nsIFrame* nextFrame = kidFrame->GetNextInFlow();
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if (!NS_FRAME_IS_FULLY_COMPLETE(kidStatus)) {
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// Need a continuation
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if (!nextFrame) {
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nsresult rv = aPresContext->PresShell()->FrameConstructor()->
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CreateContinuingFrame(aPresContext, kidFrame, aDelegatingFrame, &nextFrame);
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NS_ENSURE_SUCCESS(rv, rv);
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}
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// Add it as an overflow container.
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//XXXfr This is a hack to fix some of our printing dataloss.
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// See bug 154892. Not sure how to do it "right" yet; probably want
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// to keep continuations within an nsAbsoluteContainingBlock eventually.
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tracker.Insert(nextFrame, kidStatus);
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NS_MergeReflowStatusInto(&reflowStatus, kidStatus);
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}
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else {
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// Delete any continuations
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if (nextFrame) {
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tracker.Finish(kidFrame);
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static_cast<nsContainerFrame*>(nextFrame->GetParent())
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->DeleteNextInFlowChild(aPresContext, nextFrame, PR_TRUE);
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}
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}
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}
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else {
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tracker.Skip(kidFrame, reflowStatus);
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if (aChildBounds) {
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aChildBounds->UnionRect(*aChildBounds, kidFrame->GetOverflowRect() +
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kidFrame->GetPosition());
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}
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}
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// Make a CheckForInterrupt call, here, not just HasPendingInterrupt. That
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// will make sure that we end up reflowing aDelegatingFrame in cases when
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// one of our kids interrupted. Otherwise we'd set the dirty or
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// dirty-children bit on the kid in the condition below, and then when
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// reflow completes and we go to mark dirty bits on all ancestors of that
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// kid we'll immediately bail out, because the kid already has a dirty bit.
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// In particular, we won't set any dirty bits on aDelegatingFrame, so when
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// the following reflow happens we won't reflow the kid in question. This
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// might be slightly suboptimal in cases where |kidFrame| itself did not
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// interrupt, since we'll trigger a reflow of it too when it's not strictly
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// needed. But the logic to not do that is enough more complicated, and
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// the case enough of an edge case, that this is probably better.
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if (kidNeedsReflow && aPresContext->CheckForInterrupt(aDelegatingFrame)) {
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if (aDelegatingFrame->GetStateBits() & NS_FRAME_IS_DIRTY) {
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kidFrame->AddStateBits(NS_FRAME_IS_DIRTY);
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} else {
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kidFrame->AddStateBits(NS_FRAME_HAS_DIRTY_CHILDREN);
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}
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}
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}
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// Abspos frames can't cause their parent to be incomplete,
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// only overflow incomplete.
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if (NS_FRAME_IS_NOT_COMPLETE(reflowStatus))
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NS_FRAME_SET_OVERFLOW_INCOMPLETE(reflowStatus);
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NS_MergeReflowStatusInto(&aReflowStatus, reflowStatus);
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return NS_OK;
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}
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static inline bool IsFixedPaddingSize(const nsStyleCoord& aCoord)
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{ return aCoord.ConvertsToLength(); }
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static inline bool IsFixedMarginSize(const nsStyleCoord& aCoord)
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{ return aCoord.ConvertsToLength(); }
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static inline bool IsFixedOffset(const nsStyleCoord& aCoord)
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{ return aCoord.ConvertsToLength(); }
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PRBool
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nsAbsoluteContainingBlock::FrameDependsOnContainer(nsIFrame* f,
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PRBool aCBWidthChanged,
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PRBool aCBHeightChanged)
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{
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const nsStylePosition* pos = f->GetStylePosition();
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// See if f's position might have changed because it depends on a
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// placeholder's position
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// This can happen in the following cases:
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// 1) Vertical positioning. "top" must be auto and "bottom" must be auto
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// (otherwise the vertical position is completely determined by
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// whichever of them is not auto and the height).
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// 2) Horizontal positioning. "left" must be auto and "right" must be auto
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// (otherwise the horizontal position is completely determined by
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// whichever of them is not auto and the width).
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// See nsHTMLReflowState::InitAbsoluteConstraints -- these are the
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// only cases when we call CalculateHypotheticalBox().
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if ((pos->mOffset.GetTopUnit() == eStyleUnit_Auto &&
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pos->mOffset.GetBottomUnit() == eStyleUnit_Auto) ||
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(pos->mOffset.GetLeftUnit() == eStyleUnit_Auto &&
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pos->mOffset.GetRightUnit() == eStyleUnit_Auto)) {
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return PR_TRUE;
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}
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if (!aCBWidthChanged && !aCBHeightChanged) {
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// skip getting style data
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return PR_FALSE;
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}
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const nsStylePadding* padding = f->GetStylePadding();
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const nsStyleMargin* margin = f->GetStyleMargin();
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if (aCBWidthChanged) {
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// See if f's width might have changed.
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// If border-left, border-right, padding-left, padding-right,
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// width, min-width, and max-width are all lengths, 'none', or enumerated,
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// then our frame width does not depend on the parent width.
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// Note that borders never depend on the parent width
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// XXX All of the enumerated values except -moz-available are ok too.
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if (pos->WidthDependsOnContainer() ||
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pos->MinWidthDependsOnContainer() ||
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pos->MaxWidthDependsOnContainer() ||
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!IsFixedPaddingSize(padding->mPadding.GetLeft()) ||
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!IsFixedPaddingSize(padding->mPadding.GetRight())) {
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return PR_TRUE;
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}
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// See if f's position might have changed. If we're RTL then the
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// rules are slightly different. We'll assume percentage or auto
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// margins will always induce a dependency on the size
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if (!IsFixedMarginSize(margin->mMargin.GetLeft()) ||
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!IsFixedMarginSize(margin->mMargin.GetRight())) {
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return PR_TRUE;
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}
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if (f->GetStyleVisibility()->mDirection == NS_STYLE_DIRECTION_RTL) {
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// Note that even if 'left' is a length, our position can
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// still depend on the containing block width, because if
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// 'right' is also a length we will discard 'left' and be
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// positioned relative to the containing block right edge.
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// 'left' length and 'right' auto is the only combination
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// we can be sure of.
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if (!IsFixedOffset(pos->mOffset.GetLeft()) ||
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pos->mOffset.GetRightUnit() != eStyleUnit_Auto) {
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return PR_TRUE;
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}
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} else {
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if (!IsFixedOffset(pos->mOffset.GetLeft())) {
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return PR_TRUE;
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}
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}
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}
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if (aCBHeightChanged) {
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// See if f's height might have changed.
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// If border-top, border-bottom, padding-top, padding-bottom,
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// min-height, and max-height are all lengths or 'none',
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// and height is a length or height and bottom are auto and top is not auto,
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// then our frame height does not depend on the parent height.
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// Note that borders never depend on the parent height
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if ((pos->HeightDependsOnContainer() &&
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!(pos->mHeight.GetUnit() == eStyleUnit_Auto &&
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pos->mOffset.GetBottomUnit() == eStyleUnit_Auto &&
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pos->mOffset.GetTopUnit() != eStyleUnit_Auto)) ||
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pos->MinHeightDependsOnContainer() ||
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pos->MaxHeightDependsOnContainer() ||
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!IsFixedPaddingSize(padding->mPadding.GetTop()) ||
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!IsFixedPaddingSize(padding->mPadding.GetBottom())) {
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return PR_TRUE;
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}
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// See if f's position might have changed.
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if (!IsFixedMarginSize(margin->mMargin.GetTop()) ||
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!IsFixedMarginSize(margin->mMargin.GetBottom())) {
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return PR_TRUE;
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}
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if (!IsFixedOffset(pos->mOffset.GetTop())) {
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return PR_TRUE;
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}
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}
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return PR_FALSE;
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}
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void
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nsAbsoluteContainingBlock::DestroyFrames(nsIFrame* aDelegatingFrame,
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nsIFrame* aDestructRoot)
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{
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mAbsoluteFrames.DestroyFramesFrom(aDestructRoot);
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}
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void
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nsAbsoluteContainingBlock::MarkSizeDependentFramesDirty()
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{
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DoMarkFramesDirty(PR_FALSE);
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}
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void
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nsAbsoluteContainingBlock::MarkAllFramesDirty()
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{
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DoMarkFramesDirty(PR_TRUE);
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}
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void
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nsAbsoluteContainingBlock::DoMarkFramesDirty(PRBool aMarkAllDirty)
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{
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for (nsIFrame* kidFrame = mAbsoluteFrames.FirstChild();
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kidFrame;
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kidFrame = kidFrame->GetNextSibling()) {
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if (aMarkAllDirty) {
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kidFrame->AddStateBits(NS_FRAME_IS_DIRTY);
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} else if (FrameDependsOnContainer(kidFrame, PR_TRUE, PR_TRUE)) {
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// Add the weakest flags that will make sure we reflow this frame later
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kidFrame->AddStateBits(NS_FRAME_HAS_DIRTY_CHILDREN);
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}
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}
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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() == nsGkAtoms::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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nsPresContext* 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 aConstrainHeight,
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nsIFrame* aKidFrame,
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nsReflowStatus& aStatus,
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nsRect* aChildBounds)
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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 (aKidFrame) {
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nsAutoString name;
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aKidFrame->GetFrameName(name);
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printf("%s ", NS_LossyConvertUTF16toASCII(name).get());
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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.ComputedWidth(), width);
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PrettyUC(aReflowState.ComputedHeight(), height);
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printf("c=%s,%s \n", width, height);
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}
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AutoNoisyIndenter indent(nsBlockFrame::gNoisy);
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#endif // DEBUG
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// Store position and overflow rect so taht we can invalidate the correct
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// area if the position changes
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nsRect oldOverflowRect(aKidFrame->GetOverflowRect() +
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aKidFrame->GetPosition());
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nsRect oldRect = aKidFrame->GetRect();
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nsresult rv;
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// Get the border values
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const nsMargin& border = aReflowState.mStyleBorder->GetActualBorder();
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nscoord availWidth = aContainingBlockWidth;
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if (availWidth == -1) {
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NS_ASSERTION(aReflowState.ComputedWidth() != NS_UNCONSTRAINEDSIZE,
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"Must have a useful width _somewhere_");
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availWidth =
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aReflowState.ComputedWidth() + aReflowState.mComputedPadding.LeftRight();
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}
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nsHTMLReflowMetrics kidDesiredSize;
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nsHTMLReflowState kidReflowState(aPresContext, aReflowState, aKidFrame,
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nsSize(availWidth, NS_UNCONSTRAINEDSIZE),
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aContainingBlockWidth,
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aContainingBlockHeight);
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// Send the WillReflow() notification and position the frame
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aKidFrame->WillReflow(aPresContext);
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PRBool constrainHeight = (aReflowState.availableHeight != NS_UNCONSTRAINEDSIZE)
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&& aConstrainHeight
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// Don't split if told not to (e.g. for fixed frames)
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&& (aDelegatingFrame->GetType() != nsGkAtoms::positionedInlineFrame)
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//XXX we don't handle splitting frames for inline absolute containing blocks yet
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&& (aKidFrame->GetRect().y <= aReflowState.availableHeight);
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// Don't split things below the fold. (Ideally we shouldn't *have*
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// anything totally below the fold, but we can't position frames
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// across next-in-flow breaks yet.
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if (constrainHeight) {
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kidReflowState.availableHeight = aReflowState.availableHeight - border.top
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- kidReflowState.mComputedMargin.top;
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if (NS_AUTOOFFSET != kidReflowState.mComputedOffsets.top)
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kidReflowState.availableHeight -= kidReflowState.mComputedOffsets.top;
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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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NS_ASSERTION(NS_AUTOOFFSET != kidReflowState.mComputedOffsets.right,
|
|
"Can't solve for both left and right");
|
|
kidReflowState.mComputedOffsets.left = aContainingBlockWidth -
|
|
kidReflowState.mComputedOffsets.right -
|
|
kidReflowState.mComputedMargin.right -
|
|
kidDesiredSize.width -
|
|
kidReflowState.mComputedMargin.left;
|
|
}
|
|
if (NS_AUTOOFFSET == kidReflowState.mComputedOffsets.top) {
|
|
kidReflowState.mComputedOffsets.top = aContainingBlockHeight -
|
|
kidReflowState.mComputedOffsets.bottom -
|
|
kidReflowState.mComputedMargin.bottom -
|
|
kidDesiredSize.height -
|
|
kidReflowState.mComputedMargin.top;
|
|
}
|
|
}
|
|
|
|
// Position the child relative to our padding edge
|
|
nsRect rect(border.left + kidReflowState.mComputedOffsets.left + kidReflowState.mComputedMargin.left,
|
|
border.top + kidReflowState.mComputedOffsets.top + kidReflowState.mComputedMargin.top,
|
|
kidDesiredSize.width, kidDesiredSize.height);
|
|
aKidFrame->SetRect(rect);
|
|
|
|
nsIView* view = aKidFrame->GetView();
|
|
if (view) {
|
|
// Size and position the view and set its opacity, visibility, content
|
|
// transparency, and clip
|
|
nsContainerFrame::SyncFrameViewAfterReflow(aPresContext, aKidFrame,
|
|
view,
|
|
&kidDesiredSize.mOverflowArea);
|
|
} else {
|
|
nsContainerFrame::PositionChildViews(aKidFrame);
|
|
}
|
|
|
|
if (oldRect.TopLeft() != rect.TopLeft() ||
|
|
(aDelegatingFrame->GetStateBits() & NS_FRAME_FIRST_REFLOW) ||
|
|
(kidDesiredSize.mOverflowArea + rect.TopLeft() != oldOverflowRect &&
|
|
(kidDesiredSize.mOverflowArea + rect.TopLeft() != rect || oldRect != oldOverflowRect))) {
|
|
// The frame moved; we have to invalidate the whole frame
|
|
// because the children may have moved after they were reflowed
|
|
// We also have to invalidate when we have overflow and the overflow
|
|
// changes because the change might be caused by clipping
|
|
// XXX This could be optimized in some cases, especially clipping changes
|
|
aKidFrame->GetParent()->Invalidate(oldOverflowRect);
|
|
aKidFrame->GetParent()->Invalidate(kidDesiredSize.mOverflowArea +
|
|
rect.TopLeft());
|
|
} else if (oldRect.Size() != rect.Size()) {
|
|
// Invalidate the area where the frame changed size.
|
|
nscoord innerWidth = NS_MIN(oldRect.width, rect.width);
|
|
nscoord innerHeight = NS_MIN(oldRect.height, rect.height);
|
|
nscoord outerWidth = NS_MAX(oldRect.width, rect.width);
|
|
nscoord outerHeight = NS_MAX(oldRect.height, rect.height);
|
|
aKidFrame->GetParent()->Invalidate(
|
|
nsRect(rect.x + innerWidth, rect.y, outerWidth - innerWidth, outerHeight));
|
|
// Invalidate the horizontal strip
|
|
aKidFrame->GetParent()->Invalidate(
|
|
nsRect(rect.x, rect.y + innerHeight, outerWidth, outerHeight - innerHeight));
|
|
}
|
|
aKidFrame->DidReflow(aPresContext, &kidReflowState, NS_FRAME_REFLOW_FINISHED);
|
|
|
|
#ifdef DEBUG
|
|
if (nsBlockFrame::gNoisyReflow) {
|
|
nsFrame::IndentBy(stdout,nsBlockFrame::gNoiseIndent - 1);
|
|
printf("abs pos ");
|
|
if (aKidFrame) {
|
|
nsAutoString name;
|
|
aKidFrame->GetFrameName(name);
|
|
printf("%s ", NS_LossyConvertUTF16toASCII(name).get());
|
|
}
|
|
printf("%p rect=%d,%d,%d,%d\n", static_cast<void*>(aKidFrame),
|
|
rect.x, rect.y, rect.width, rect.height);
|
|
}
|
|
#endif
|
|
|
|
if (aChildBounds)
|
|
aChildBounds->UnionRect(*aChildBounds, kidDesiredSize.mOverflowArea +
|
|
rect.TopLeft());
|
|
|
|
return rv;
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
void nsAbsoluteContainingBlock::PrettyUC(nscoord aSize,
|
|
char* aBuf)
|
|
{
|
|
if (NS_UNCONSTRAINEDSIZE == aSize) {
|
|
strcpy(aBuf, "UC");
|
|
}
|
|
else {
|
|
if((PRInt32)0xdeadbeef == aSize)
|
|
{
|
|
strcpy(aBuf, "deadbeef");
|
|
}
|
|
else {
|
|
sprintf(aBuf, "%d", aSize);
|
|
}
|
|
}
|
|
}
|
|
#endif
|