forked from mirrors/gecko-dev
265e672179
# ignore-this-changeset --HG-- extra : amend_source : 4d301d3b0b8711c4692392aa76088ba7fd7d1022
72 lines
3 KiB
C++
72 lines
3 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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/*
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* a list of the recomputation that needs to be done in response to a
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* style change
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*/
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#include "nsStyleChangeList.h"
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#include "mozilla/dom/ElementInlines.h"
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#include "nsCSSFrameConstructor.h"
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#include "nsIContent.h"
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#include "nsIFrame.h"
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void nsStyleChangeList::AppendChange(nsIFrame* aFrame, nsIContent* aContent,
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nsChangeHint aHint) {
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MOZ_ASSERT(aFrame || (aHint & nsChangeHint_ReconstructFrame),
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"must have frame");
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MOZ_ASSERT(aHint, "No hint to process?");
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MOZ_ASSERT(!(aHint & nsChangeHint_NeutralChange),
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"Neutral changes do not need extra processing, "
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"and should be stripped out");
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MOZ_ASSERT(aContent || !(aHint & nsChangeHint_ReconstructFrame),
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"must have content");
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// XXXbz we should make this take Element instead of nsIContent
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MOZ_ASSERT(
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!aContent || aContent->IsElement() ||
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// display:contents elements posts the changes for their children:
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(aFrame && aContent->GetFlattenedTreeParentElementForStyle() &&
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Servo_Element_IsDisplayContents(
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aContent->GetFlattenedTreeParentElementForStyle())) ||
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(aContent->IsText() && aContent->HasFlag(NODE_NEEDS_FRAME) &&
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aHint & nsChangeHint_ReconstructFrame),
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"Shouldn't be trying to restyle non-elements directly, "
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"except if it's a display:contents child or a text node "
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"doing lazy frame construction");
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MOZ_ASSERT(!(aHint & nsChangeHint_AllReflowHints) ||
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(aHint & nsChangeHint_NeedReflow),
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"Reflow hint bits set without actually asking for a reflow");
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if (aHint & nsChangeHint_ReconstructFrame) {
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// If Servo fires reconstruct at a node, it is the only change hint fired at
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// that node.
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// Note: Because we check whether |aHint| is a reconstruct above (which is
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// necessary to avoid debug test timeouts on certain crashtests), this check
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// will not find bugs where we add a non-reconstruct hint for an element
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// after adding a reconstruct. This is ok though, since
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// ProcessRestyledFrames will handle that case via mDestroyedFrames.
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#ifdef DEBUG
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for (size_t i = 0; i < Length(); ++i) {
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MOZ_ASSERT(aContent != (*this)[i].mContent ||
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!((*this)[i].mHint & nsChangeHint_ReconstructFrame),
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"Should not append a non-ReconstructFrame hint after \
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appending a ReconstructFrame hint for the same \
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content.");
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}
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#endif
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}
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if (!IsEmpty() && aFrame && aFrame == LastElement().mFrame) {
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LastElement().mHint |= aHint;
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return;
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}
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AppendElement(nsStyleChangeData{aFrame, aContent, aHint});
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}
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