зеркало из https://github.com/mozilla/gecko-dev.git
45 строки
1.2 KiB
C++
45 строки
1.2 KiB
C++
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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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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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#include "RubyUtils.h"
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#include "nsIFrame.h"
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using namespace mozilla;
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NS_DECLARE_FRAME_PROPERTY(ReservedISize, nullptr);
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union NSCoordValue
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{
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nscoord mCoord;
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void* mPointer;
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static_assert(sizeof(nscoord) <= sizeof(void*),
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"Cannot store nscoord in pointer");
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};
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/* static */ void
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RubyUtils::SetReservedISize(nsIFrame* aFrame, nscoord aISize)
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{
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MOZ_ASSERT(IsExpandableRubyBox(aFrame));
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NSCoordValue value = { aISize };
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aFrame->Properties().Set(ReservedISize(), value.mPointer);
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}
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/* static */ void
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RubyUtils::ClearReservedISize(nsIFrame* aFrame)
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{
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MOZ_ASSERT(IsExpandableRubyBox(aFrame));
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aFrame->Properties().Remove(ReservedISize());
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}
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/* static */ nscoord
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RubyUtils::GetReservedISize(nsIFrame* aFrame)
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{
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MOZ_ASSERT(IsExpandableRubyBox(aFrame));
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NSCoordValue value;
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value.mPointer = aFrame->Properties().Get(ReservedISize());
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return value.mCoord;
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}
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