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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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 http://mozilla.org/MPL/2.0/. */
#ifndef DEBUG
static_assert(false, "This should not be compiled in !DEBUG");
#endif // DEBUG
#include "nsAutoLayoutPhase.h"
#include "nsPresContext.h"
#include "nsContentUtils.h"
nsAutoLayoutPhase::nsAutoLayoutPhase(nsPresContext* aPresContext,
nsLayoutPhase aPhase)
: mPresContext(aPresContext)
, mPhase(aPhase)
, mCount(0)
{
Enter();
}
nsAutoLayoutPhase::~nsAutoLayoutPhase()
{
Exit();
MOZ_ASSERT(mCount == 0, "imbalanced");
}
void
nsAutoLayoutPhase::Enter()
{
switch (mPhase) {
case eLayoutPhase_Paint:
MOZ_ASSERT(mPresContext->mLayoutPhaseCount[eLayoutPhase_Paint] == 0,
"recurring into paint");
MOZ_ASSERT(mPresContext->mLayoutPhaseCount[eLayoutPhase_Reflow] == 0,
"painting in the middle of reflow");
MOZ_ASSERT(mPresContext->mLayoutPhaseCount[eLayoutPhase_FrameC] == 0,
"painting in the middle of frame construction");
break;
case eLayoutPhase_Reflow:
MOZ_ASSERT(mPresContext->mLayoutPhaseCount[eLayoutPhase_Paint] == 0,
"reflowing in the middle of a paint");
MOZ_ASSERT(mPresContext->mLayoutPhaseCount[eLayoutPhase_Reflow] == 0,
"recurring into reflow");
MOZ_ASSERT(mPresContext->mLayoutPhaseCount[eLayoutPhase_FrameC] == 0,
"reflowing in the middle of frame construction");
break;
case eLayoutPhase_FrameC:
MOZ_ASSERT(mPresContext->mLayoutPhaseCount[eLayoutPhase_Paint] == 0,
"constructing frames in the middle of a paint");
MOZ_ASSERT(mPresContext->mLayoutPhaseCount[eLayoutPhase_Reflow] == 0,
"constructing frames in the middle of reflow");
MOZ_ASSERT(mPresContext->mLayoutPhaseCount[eLayoutPhase_FrameC] == 0,
"recurring into frame construction");
MOZ_ASSERT(!nsContentUtils::IsSafeToRunScript(),
"constructing frames and scripts are not blocked");
break;
case eLayoutPhase_COUNT:
break;
}
++(mPresContext->mLayoutPhaseCount[mPhase]);
++mCount;
}
void
nsAutoLayoutPhase::Exit()
{
MOZ_ASSERT(mCount > 0 && mPresContext->mLayoutPhaseCount[mPhase] > 0,
"imbalanced");
--(mPresContext->mLayoutPhaseCount[mPhase]);
--mCount;
}
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