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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. AND ITS CONTRIBUTORS ``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 ITS 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 "FlexFormattingGeometry.h"
#include "FlexFormattingContext.h"
#include "LayoutContext.h"
#include "RenderStyleInlines.h"
namespace WebCore {
namespace Layout {
FlexFormattingGeometry::FlexFormattingGeometry(const FlexFormattingContext& flexFormattingContext)
: FormattingGeometry(flexFormattingContext)
{
}
bool FlexFormattingGeometry::isMainAxisParallelWithInlineAxis(const ElementBox& flexBox)
{
ASSERT(flexBox.isFlexBox());
auto flexDirection = flexBox.style().flexDirection();
return flexDirection == FlexDirection::Row || flexBox.style().flexDirection() == FlexDirection::RowReverse;
}
bool FlexFormattingGeometry::isReversedToContentDirection(const ElementBox& flexBox)
{
ASSERT(flexBox.isFlexBox());
auto flexDirection = flexBox.style().flexDirection();
return flexDirection == FlexDirection::RowReverse || flexDirection == FlexDirection::ColumnReverse;
}
IntrinsicWidthConstraints FlexFormattingGeometry::intrinsicWidthConstraints(const ElementBox& flexItem) const
{
auto fixedMarginBorderAndPadding = [&](auto& layoutBox) {
auto& style = layoutBox.style();
return fixedValue(style.marginStart()).value_or(0)
+ LayoutUnit { style.borderLeftWidth() }
+ fixedValue(style.paddingLeft()).value_or(0)
+ fixedValue(style.paddingRight()).value_or(0)
+ LayoutUnit { style.borderRightWidth() }
+ fixedValue(style.marginEnd()).value_or(0);
};
auto computedIntrinsicWidthConstraints = [&]() -> IntrinsicWidthConstraints {
auto logicalWidth = flexItem.style().logicalWidth();
// Minimum/maximum width can't be depending on the containing block's width.
auto needsResolvedContainingBlockWidth = logicalWidth.isCalculated() || logicalWidth.isPercent() || logicalWidth.isRelative();
if (needsResolvedContainingBlockWidth)
return { };
if (auto width = fixedValue(logicalWidth))
return { *width, *width };
ASSERT(flexItem.establishesFormattingContext());
auto& layoutState = this->layoutState();
auto intrinsicWidthConstraints = LayoutContext::createFormattingContext(flexItem, const_cast<LayoutState&>(layoutState))->computedIntrinsicWidthConstraints();
if (logicalWidth.isMinContent())
return { intrinsicWidthConstraints.minimum, intrinsicWidthConstraints.minimum };
if (logicalWidth.isMaxContent())
return { intrinsicWidthConstraints.maximum, intrinsicWidthConstraints.maximum };
return intrinsicWidthConstraints;
};
auto intrinsicWidthConstraints = constrainByMinMaxWidth(flexItem, computedIntrinsicWidthConstraints());
intrinsicWidthConstraints.expand(fixedMarginBorderAndPadding(flexItem));
return intrinsicWidthConstraints;
}
}
}
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