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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at */
#include "DepthOrderedFrameList.h"
#include "nsIFrame.h"
#include "nsContainerFrame.h"
namespace mozilla {
void DepthOrderedFrameList::Add(nsIFrame* aFrame) {
// Is this root already scheduled for reflow?
// FIXME: This could possibly be changed to a uniqueness assertion, with some
// work in ResizeReflowIgnoreOverride (and maybe others?)
// FIXME(emilio): Should probably reuse the traversal for insertion.
if (Contains(aFrame)) {
// We don't expect frame to change depths.
MOZ_ASSERT(aFrame->GetDepthInFrameTree() ==
FrameAndDepth{aFrame, aFrame->GetDepthInFrameTree()},
void DepthOrderedFrameList::Remove(nsIFrame* aFrame) {
nsIFrame* DepthOrderedFrameList::PopShallowestRoot() {
// List is sorted in order of decreasing depth, so there are no shallower
// frames than the last one.
const FrameAndDepth& lastFAD = mList.PopLastElement();
nsIFrame* frame = lastFAD.mFrame;
// We don't expect frame to change depths.
MOZ_ASSERT(frame->GetDepthInFrameTree() == lastFAD.mDepth);
return frame;
bool DepthOrderedFrameList::FrameIsAncestorOfAnyElement(
nsIFrame* aFrame) const {
// Look for a path from any element to aFrame, following GetParent(). This
// check mirrors what FrameNeedsReflow() would have done if the reflow root
// didn't get in the way.
for (nsIFrame* f : mList) {
do {
if (f == aFrame) {
return true;
f = f->GetParent();
} while (f);
return false;
} // namespace mozilla