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70 lines
2.8 KiB
C++
70 lines
2.8 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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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 "nsIContent.h"
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#include "nsIFrame.h"
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#include "nsFrameManager.h"
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void
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nsStyleChangeList::AppendChange(nsIFrame* aFrame, nsIContent* aContent, nsChangeHint aHint)
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{
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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(!aContent || aContent->IsElement() ||
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// display:contents elements posts the changes for their children:
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(aFrame && aContent->GetParent() &&
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aFrame->PresContext()->FrameManager()->
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GetDisplayContentsStyleFor(aContent->GetParent())) ||
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(aContent->IsNodeOfType(nsINode::eTEXT) &&
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aContent->IsStyledByServo() &&
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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 Servo fires reconstruct at a node, it is the only change hint fired at
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// that node.
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if (IsServo()) {
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for (size_t i = 0; i < Length(); ++i) {
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MOZ_ASSERT_IF(aContent && ((aHint | (*this)[i].mHint) & nsChangeHint_ReconstructFrame),
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(*this)[i].mContent != aContent);
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}
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} else {
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// Filter out all other changes for same content for Gecko (Servo asserts against this
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// case above).
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if (aContent && (aHint & nsChangeHint_ReconstructFrame)) {
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// NOTE: This is captured by reference to please static analysis.
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// Capturing it by value as a pointer should be fine in this case.
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RemoveElementsBy([&](const nsStyleChangeData& aData) {
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return aData.mContent == aContent;
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});
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}
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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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