зеркало из https://github.com/mozilla/gecko-dev.git
91 строка
3.6 KiB
C++
91 строка
3.6 KiB
C++
/* -*- 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 eLayoutPhase_Paint:
|
|
MOZ_ASSERT(mPresContext->mLayoutPhaseCount[eLayoutPhase_Paint] == 0,
|
|
"recurring into paint");
|
|
MOZ_ASSERT(
|
|
mPresContext->mLayoutPhaseCount[eLayoutPhase_DisplayListBuilding] ==
|
|
0,
|
|
"recurring into paint from display list building");
|
|
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_DisplayListBuilding:
|
|
// It's fine and expected to be in a paint here.
|
|
MOZ_ASSERT(
|
|
mPresContext->mLayoutPhaseCount[eLayoutPhase_DisplayListBuilding] ==
|
|
0,
|
|
"recurring into display list building");
|
|
MOZ_ASSERT(mPresContext->mLayoutPhaseCount[eLayoutPhase_Reflow] == 0,
|
|
"display list building in the middle of reflow");
|
|
MOZ_ASSERT(mPresContext->mLayoutPhaseCount[eLayoutPhase_FrameC] == 0,
|
|
"display list building 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_DisplayListBuilding] ==
|
|
0,
|
|
"reflowing in the middle of a display list building");
|
|
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_DisplayListBuilding] ==
|
|
0,
|
|
"constructing frames in the middle of a display list building");
|
|
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;
|
|
}
|