зеркало из https://github.com/mozilla/gecko-dev.git
90 строки
3.5 KiB
C++
90 строки
3.5 KiB
C++
/* -*- Mode: C++; tab-width: 2; 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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#ifndef DEBUG
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static_assert(false, "This should not be compiled in !DEBUG");
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#endif // DEBUG
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#include "nsAutoLayoutPhase.h"
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#include "nsPresContext.h"
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#include "nsContentUtils.h"
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nsAutoLayoutPhase::nsAutoLayoutPhase(nsPresContext* aPresContext,
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nsLayoutPhase aPhase)
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: mPresContext(aPresContext)
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, mPhase(aPhase)
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, mCount(0)
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{
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Enter();
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}
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nsAutoLayoutPhase::~nsAutoLayoutPhase()
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{
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Exit();
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MOZ_ASSERT(mCount == 0, "imbalanced");
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}
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void
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nsAutoLayoutPhase::Enter()
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{
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switch (mPhase) {
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case eLayoutPhase_Paint:
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MOZ_ASSERT(mPresContext->mLayoutPhaseCount[eLayoutPhase_Paint] == 0,
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"recurring into paint");
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MOZ_ASSERT(mPresContext->mLayoutPhaseCount[eLayoutPhase_DisplayListBuilding] == 0,
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"recurring into paint from display list building");
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MOZ_ASSERT(mPresContext->mLayoutPhaseCount[eLayoutPhase_Reflow] == 0,
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"painting in the middle of reflow");
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MOZ_ASSERT(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_DisplayListBuilding:
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// It's fine and expected to be in a paint here.
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MOZ_ASSERT(mPresContext->mLayoutPhaseCount[eLayoutPhase_DisplayListBuilding] == 0,
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"recurring into display list building");
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MOZ_ASSERT(mPresContext->mLayoutPhaseCount[eLayoutPhase_Reflow] == 0,
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"display list building in the middle of reflow");
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MOZ_ASSERT(mPresContext->mLayoutPhaseCount[eLayoutPhase_FrameC] == 0,
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"display list building in the middle of frame construction");
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break;
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case eLayoutPhase_Reflow:
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MOZ_ASSERT(mPresContext->mLayoutPhaseCount[eLayoutPhase_Paint] == 0,
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"reflowing in the middle of a paint");
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MOZ_ASSERT(mPresContext->mLayoutPhaseCount[eLayoutPhase_DisplayListBuilding] == 0,
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"reflowing in the middle of a display list building");
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MOZ_ASSERT(mPresContext->mLayoutPhaseCount[eLayoutPhase_Reflow] == 0,
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"recurring into reflow");
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MOZ_ASSERT(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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MOZ_ASSERT(mPresContext->mLayoutPhaseCount[eLayoutPhase_Paint] == 0,
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"constructing frames in the middle of a paint");
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MOZ_ASSERT(mPresContext->mLayoutPhaseCount[eLayoutPhase_DisplayListBuilding] == 0,
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"constructing frames in the middle of a display list building");
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MOZ_ASSERT(mPresContext->mLayoutPhaseCount[eLayoutPhase_Reflow] == 0,
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"constructing frames in the middle of reflow");
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MOZ_ASSERT(mPresContext->mLayoutPhaseCount[eLayoutPhase_FrameC] == 0,
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"recurring into frame construction");
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MOZ_ASSERT(!nsContentUtils::IsSafeToRunScript(),
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"constructing frames and scripts are not blocked");
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break;
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case eLayoutPhase_COUNT:
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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
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nsAutoLayoutPhase::Exit()
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{
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MOZ_ASSERT(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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