InlineFormattingContextGeometry.cpp   [plain text]

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#include "config.h"
#include "InlineFormattingContext.h"

#if ENABLE(LAYOUT_FORMATTING_CONTEXT)

#include "FormattingContext.h"
#include "LayoutBox.h"
#include "LayoutContainer.h"
#include "LengthFunctions.h"

namespace WebCore {
namespace Layout {

ContentWidthAndMargin InlineFormattingContext::Geometry::inlineBlockWidthAndMargin(const Box& formattingContextRoot, const UsedHorizontalValues& usedHorizontalValues)
{
    ASSERT(formattingContextRoot.isInFlow());

    // 10.3.10 'Inline-block', replaced elements in normal flow

    // Exactly as inline replaced elements.
    if (formattingContextRoot.replaced())
        return inlineReplacedWidthAndMargin(formattingContextRoot, usedHorizontalValues);

    // 10.3.9 'Inline-block', non-replaced elements in normal flow

    // If 'width' is 'auto', the used value is the shrink-to-fit width as for floating elements.
    // A computed value of 'auto' for 'margin-left' or 'margin-right' becomes a used value of '0'.
    // #1
    auto width = computedValueIfNotAuto(formattingContextRoot.style().logicalWidth(), usedHorizontalValues.constraints.width);
    if (!width)
        width = shrinkToFitWidth(formattingContextRoot, usedHorizontalValues.constraints.width);

    // #2
    auto computedHorizontalMargin = Geometry::computedHorizontalMargin(formattingContextRoot, usedHorizontalValues);

    return ContentWidthAndMargin { *width, { computedHorizontalMargin.start.valueOr(0_lu), computedHorizontalMargin.end.valueOr(0_lu) }, computedHorizontalMargin };
}

ContentHeightAndMargin InlineFormattingContext::Geometry::inlineBlockHeightAndMargin(const Box& layoutBox, const UsedHorizontalValues& usedHorizontalValues, const UsedVerticalValues& usedVerticalValues) const
{
    ASSERT(layoutBox.isInFlow());

    // 10.6.2 Inline replaced elements, block-level replaced elements in normal flow, 'inline-block' replaced elements in normal flow and floating replaced elements
    if (layoutBox.replaced())
        return inlineReplacedHeightAndMargin(layoutBox, usedHorizontalValues, usedVerticalValues);

    // 10.6.6 Complicated cases
    // - 'Inline-block', non-replaced elements.
    return complicatedCases(layoutBox, usedHorizontalValues, usedVerticalValues);
}

Optional<InlineLayoutUnit> InlineFormattingContext::Geometry::computedTextIndent(const Container& formattingContextRoot, const UsedHorizontalValues::Constraints& horizontalConstraints) const
{
    auto textIndent = formattingContextRoot.style().textIndent();
    if (textIndent == RenderStyle::initialTextIndent())
        return { };
    return InlineLayoutUnit { minimumValueForLength(textIndent, horizontalConstraints.width) };
}

}
}

#endif