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36 lines
1.1 KiB
C++
36 lines
1.1 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 "DisplayListClipState.h"
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#include "nsDisplayList.h"
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namespace mozilla {
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const DisplayItemClip*
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DisplayListClipState::GetCurrentCombinedClip(nsDisplayListBuilder* aBuilder)
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{
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if (mCurrentCombinedClip) {
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return mCurrentCombinedClip;
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}
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if (!mClipContentDescendants && !mClipContainingBlockDescendants) {
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return nullptr;
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}
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void* mem = aBuilder->Allocate(sizeof(DisplayItemClip));
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if (mClipContentDescendants) {
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mCurrentCombinedClip =
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new (mem) DisplayItemClip(*mClipContentDescendants);
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if (mClipContainingBlockDescendants) {
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mCurrentCombinedClip->IntersectWith(*mClipContainingBlockDescendants);
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}
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} else {
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mCurrentCombinedClip =
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new (mem) DisplayItemClip(*mClipContainingBlockDescendants);
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}
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return mCurrentCombinedClip;
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}
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}
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