forked from mirrors/gecko-dev
63 lines
2 KiB
C++
63 lines
2 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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#include "DepthOrderedFrameList.h"
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#include "nsIFrame.h"
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#include "nsContainerFrame.h"
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namespace mozilla {
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void DepthOrderedFrameList::Add(nsIFrame* aFrame) {
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// Is this root already scheduled for reflow?
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// FIXME: This could possibly be changed to a uniqueness assertion, with some
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// work in ResizeReflowIgnoreOverride (and maybe others?)
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// FIXME(emilio): Should probably reuse the traversal for insertion.
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if (Contains(aFrame)) {
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// We don't expect frame to change depths.
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MOZ_ASSERT(aFrame->GetDepthInFrameTree() ==
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mList[mList.IndexOf(aFrame)].mDepth);
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return;
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}
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mList.InsertElementSorted(
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FrameAndDepth{aFrame, aFrame->GetDepthInFrameTree()},
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FrameAndDepth::CompareByReverseDepth{});
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}
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void DepthOrderedFrameList::Remove(nsIFrame* aFrame) {
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mList.RemoveElement(aFrame);
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}
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nsIFrame* DepthOrderedFrameList::PopShallowestRoot() {
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// List is sorted in order of decreasing depth, so there are no shallower
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// frames than the last one.
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const FrameAndDepth& lastFAD = mList.PopLastElement();
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nsIFrame* frame = lastFAD.mFrame;
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// We don't expect frame to change depths.
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MOZ_ASSERT(frame->GetDepthInFrameTree() == lastFAD.mDepth);
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return frame;
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}
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bool DepthOrderedFrameList::FrameIsAncestorOfAnyElement(
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nsIFrame* aFrame) const {
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MOZ_ASSERT(aFrame);
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// Look for a path from any element to aFrame, following GetParent(). This
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// check mirrors what FrameNeedsReflow() would have done if the reflow root
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// didn't get in the way.
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for (nsIFrame* f : mList) {
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do {
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if (f == aFrame) {
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return true;
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}
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f = f->GetParent();
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} while (f);
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}
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return false;
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}
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} // namespace mozilla
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