mirror of
https://gitlab.winehq.org/wine/wine-gecko.git
synced 2024-09-13 09:24:08 -07:00
99 lines
3.1 KiB
C++
99 lines
3.1 KiB
C++
/* 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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#ifndef nsAutoLayoutPhase_h
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#define nsAutoLayoutPhase_h
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#ifdef DEBUG
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#include "nsPresContext.h"
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#include "nsContentUtils.h"
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struct nsAutoLayoutPhase {
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nsAutoLayoutPhase(nsPresContext* aPresContext, nsLayoutPhase aPhase)
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: mPresContext(aPresContext), mPhase(aPhase), mCount(0)
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{
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Enter();
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}
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~nsAutoLayoutPhase()
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{
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Exit();
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NS_ASSERTION(mCount == 0, "imbalanced");
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}
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void Enter()
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{
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switch (mPhase) {
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case eLayoutPhase_Paint:
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NS_ASSERTION(mPresContext->mLayoutPhaseCount[eLayoutPhase_Paint] == 0,
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"recurring into paint");
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NS_ASSERTION(mPresContext->mLayoutPhaseCount[eLayoutPhase_Reflow] == 0,
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"painting in the middle of reflow");
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NS_ASSERTION(mPresContext->mLayoutPhaseCount[eLayoutPhase_FrameC] == 0,
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"painting in the middle of frame construction");
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break;
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case eLayoutPhase_Reflow:
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NS_ASSERTION(mPresContext->mLayoutPhaseCount[eLayoutPhase_Paint] == 0,
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"reflowing in the middle of a paint");
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NS_ASSERTION(mPresContext->mLayoutPhaseCount[eLayoutPhase_Reflow] == 0,
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"recurring into reflow");
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NS_ASSERTION(mPresContext->mLayoutPhaseCount[eLayoutPhase_FrameC] == 0,
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"reflowing in the middle of frame construction");
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break;
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case eLayoutPhase_FrameC:
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NS_ASSERTION(mPresContext->mLayoutPhaseCount[eLayoutPhase_Paint] == 0,
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"constructing frames in the middle of a paint");
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NS_ASSERTION(mPresContext->mLayoutPhaseCount[eLayoutPhase_Reflow] == 0,
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"constructing frames in the middle of reflow");
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NS_ASSERTION(mPresContext->mLayoutPhaseCount[eLayoutPhase_FrameC] == 0,
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"recurring into frame construction");
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NS_ASSERTION(!nsContentUtils::IsSafeToRunScript(),
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"constructing frames and scripts are not blocked");
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break;
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default:
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break;
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}
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++(mPresContext->mLayoutPhaseCount[mPhase]);
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++mCount;
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}
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void Exit()
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{
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NS_ASSERTION(mCount > 0 && mPresContext->mLayoutPhaseCount[mPhase] > 0,
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"imbalanced");
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--(mPresContext->mLayoutPhaseCount[mPhase]);
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--mCount;
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}
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private:
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nsPresContext* mPresContext;
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nsLayoutPhase mPhase;
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PRUint32 mCount;
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};
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#define AUTO_LAYOUT_PHASE_ENTRY_POINT(pc_, phase_) \
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nsAutoLayoutPhase autoLayoutPhase((pc_), (eLayoutPhase_##phase_))
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#define LAYOUT_PHASE_TEMP_EXIT() \
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PR_BEGIN_MACRO \
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autoLayoutPhase.Exit(); \
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PR_END_MACRO
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#define LAYOUT_PHASE_TEMP_REENTER() \
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PR_BEGIN_MACRO \
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autoLayoutPhase.Enter(); \
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PR_END_MACRO
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#else
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#define AUTO_LAYOUT_PHASE_ENTRY_POINT(pc_, phase_) \
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PR_BEGIN_MACRO PR_END_MACRO
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#define LAYOUT_PHASE_TEMP_EXIT() \
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PR_BEGIN_MACRO PR_END_MACRO
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#define LAYOUT_PHASE_TEMP_REENTER() \
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PR_BEGIN_MACRO PR_END_MACRO
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#endif
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#endif // nsAutoLayoutPhase_h
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