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/*
* Copyright (C) 2020 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "StyleSelfAlignmentData.h"
#include "BoxSides.h"
#include "LayoutUnit.h"
#include "WritingMode.h"
#include <wtf/text/TextStream.h>
namespace WebCore {
LayoutUnit StyleSelfAlignmentData::adjustmentFromStartEdge(LayoutUnit extraSpace, ItemPosition alignmentPosition, LogicalBoxAxis containerAxis, WritingMode containerWritingMode, WritingMode selfWritingMode)
{
ASSERT(ItemPosition::Auto != alignmentPosition);
switch (alignmentPosition) {
case ItemPosition::Normal:
case ItemPosition::Stretch:
case ItemPosition::Start:
case ItemPosition::FlexStart:
return 0_lu;
case ItemPosition::Center:
case ItemPosition::AnchorCenter:
return extraSpace / 2;
case ItemPosition::End:
case ItemPosition::FlexEnd:
return extraSpace;
case ItemPosition::SelfStart:
if (LogicalBoxAxis::Inline == containerAxis)
return containerWritingMode.isInlineMatchingAny(selfWritingMode) ? 0_lu : extraSpace;
return containerWritingMode.isBlockMatchingAny(selfWritingMode) ? 0_lu : extraSpace;
case ItemPosition::SelfEnd:
if (LogicalBoxAxis::Inline == containerAxis)
return containerWritingMode.isInlineMatchingAny(selfWritingMode) ? extraSpace : 0_lu;
return containerWritingMode.isBlockMatchingAny(selfWritingMode) ? extraSpace : 0_lu;
case ItemPosition::Left:
if (LogicalBoxAxis::Inline == containerAxis)
return containerWritingMode.isBidiLTR() ? 0_lu : extraSpace;
return containerWritingMode.isBlockLeftToRight() ? 0_lu : extraSpace;
case ItemPosition::Right:
if (LogicalBoxAxis::Inline == containerAxis)
return containerWritingMode.isBidiLTR() ? extraSpace : 0_lu;
return containerWritingMode.isBlockLeftToRight() ? extraSpace : 0_lu;
case ItemPosition::Baseline:
// Self-start if self block axis; else fall back to start.
if (!selfWritingMode.isOrthogonal(containerWritingMode)) {
if (LogicalBoxAxis::Inline == containerAxis)
return 0_lu;
return containerWritingMode.isBlockOpposing(selfWritingMode) ? extraSpace : 0_lu;
}
if (LogicalBoxAxis::Inline == containerAxis) // Self block axis.
return containerWritingMode.isInlineMatchingAny(selfWritingMode) ? 0_lu : extraSpace;
return 0_lu;
case ItemPosition::LastBaseline:
// Self-end if self block axis; else fall back to end.
if (!selfWritingMode.isOrthogonal(containerWritingMode)) {
if (LogicalBoxAxis::Inline == containerAxis)
return extraSpace;
return containerWritingMode.isBlockOpposing(selfWritingMode) ? 0_lu : extraSpace;
}
if (LogicalBoxAxis::Inline == containerAxis) // Self block axis.
return containerWritingMode.isInlineMatchingAny(selfWritingMode) ? extraSpace : 0_lu;
return extraSpace;
default:
ASSERT_NOT_REACHED();
return 0_lu;
}
}
TextStream& operator<<(TextStream& ts, const StyleSelfAlignmentData& o)
{
return ts << o.position() << ' ' << o.positionType() << ' ' << o.overflow();
}
}
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