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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-28 14:29:10 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-28 14:29:10 +0000 |
commit | 2aa4a82499d4becd2284cdb482213d541b8804dd (patch) | |
tree | b80bf8bf13c3766139fbacc530efd0dd9d54394c /layout/base/nsAutoLayoutPhase.cpp | |
parent | Initial commit. (diff) | |
download | firefox-upstream.tar.xz firefox-upstream.zip |
Adding upstream version 86.0.1.upstream/86.0.1upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'layout/base/nsAutoLayoutPhase.cpp')
-rw-r--r-- | layout/base/nsAutoLayoutPhase.cpp | 90 |
1 files changed, 90 insertions, 0 deletions
diff --git a/layout/base/nsAutoLayoutPhase.cpp b/layout/base/nsAutoLayoutPhase.cpp new file mode 100644 index 0000000000..94258f943e --- /dev/null +++ b/layout/base/nsAutoLayoutPhase.cpp @@ -0,0 +1,90 @@ +/* -*- 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; +} |