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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* 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 nsLayoutPhase::Paint:
MOZ_ASSERT(mPresContext->mLayoutPhaseCount[nsLayoutPhase::Paint] == 0,
"recurring into paint");
MOZ_ASSERT(
mPresContext->mLayoutPhaseCount[nsLayoutPhase::DisplayListBuilding] ==
0,
"recurring into paint from display list building");
MOZ_ASSERT(mPresContext->mLayoutPhaseCount[nsLayoutPhase::Reflow] == 0,
"painting in the middle of reflow");
MOZ_ASSERT(mPresContext->mLayoutPhaseCount[nsLayoutPhase::FrameC] == 0,
"painting in the middle of frame construction");
break;
case nsLayoutPhase::DisplayListBuilding:
// It's fine and expected to be in a paint here.
MOZ_ASSERT(
mPresContext->mLayoutPhaseCount[nsLayoutPhase::DisplayListBuilding] ==
0,
"recurring into display list building");
MOZ_ASSERT(mPresContext->mLayoutPhaseCount[nsLayoutPhase::Reflow] == 0,
"display list building in the middle of reflow");
MOZ_ASSERT(mPresContext->mLayoutPhaseCount[nsLayoutPhase::FrameC] == 0,
"display list building in the middle of frame construction");
break;
case nsLayoutPhase::Reflow:
MOZ_ASSERT(mPresContext->mLayoutPhaseCount[nsLayoutPhase::Paint] == 0,
"reflowing in the middle of a paint");
MOZ_ASSERT(
mPresContext->mLayoutPhaseCount[nsLayoutPhase::DisplayListBuilding] ==
0,
"reflowing in the middle of a display list building");
MOZ_ASSERT(mPresContext->mLayoutPhaseCount[nsLayoutPhase::Reflow] == 0,
"recurring into reflow");
MOZ_ASSERT(mPresContext->mLayoutPhaseCount[nsLayoutPhase::FrameC] == 0,
"reflowing in the middle of frame construction");
break;
case nsLayoutPhase::FrameC:
MOZ_ASSERT(mPresContext->mLayoutPhaseCount[nsLayoutPhase::Paint] == 0,
"constructing frames in the middle of a paint");
MOZ_ASSERT(
mPresContext->mLayoutPhaseCount[nsLayoutPhase::DisplayListBuilding] ==
0,
"constructing frames in the middle of a display list building");
MOZ_ASSERT(mPresContext->mLayoutPhaseCount[nsLayoutPhase::Reflow] == 0,
"constructing frames in the middle of reflow");
MOZ_ASSERT(mPresContext->mLayoutPhaseCount[nsLayoutPhase::FrameC] == 0,
"recurring into frame construction");
MOZ_ASSERT(!nsContentUtils::IsSafeToRunScript(),
"constructing frames and scripts are not blocked");
break;
case nsLayoutPhase::COUNT:
break;
}
++(mPresContext->mLayoutPhaseCount[mPhase]);
++mCount;
}
void nsAutoLayoutPhase::Exit() {
MOZ_ASSERT(mCount > 0 && mPresContext->mLayoutPhaseCount[mPhase] > 0,
"imbalanced");
--(mPresContext->mLayoutPhaseCount[mPhase]);
--mCount;
}