зеркало из https://github.com/mozilla/gecko-dev.git
43 строки
1.2 KiB
C++
43 строки
1.2 KiB
C++
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/* -*- Mode: C++; tab-width: 20; 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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#include "DisplayItemScrollClip.h"
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namespace mozilla {
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/* static */ bool
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DisplayItemScrollClip::IsAncestor(const DisplayItemScrollClip* aAncestor,
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const DisplayItemScrollClip* aDescendant)
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{
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if (!aAncestor) {
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// null means root.
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return true;
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}
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for (const DisplayItemScrollClip* sc = aDescendant; sc; sc = sc->mCrossStackingContextParent) {
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if (sc == aAncestor) {
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return true;
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}
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}
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return false;
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}
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/* static */ nsCString
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DisplayItemScrollClip::ToString(const DisplayItemScrollClip* aScrollClip)
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{
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nsAutoCString str;
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for (const DisplayItemScrollClip* scrollClip = aScrollClip;
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scrollClip; scrollClip = scrollClip->mParent) {
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str.AppendPrintf("<%s>", scrollClip->mClip ? scrollClip->mClip->ToString().get() : "null");
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if (scrollClip->mParent) {
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str.Append(" ");
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}
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}
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return str;
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}
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} // namespace mozilla
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