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/*
* Copyright (C) 2009 Google Inc. All rights reserved.
* Copyright (C) 2011 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:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * 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.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND 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 THE COPYRIGHT
* OWNER 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 "core/layout/LayoutRubyText.h"
namespace blink {
LayoutRubyText::LayoutRubyText(Element* element) : LayoutBlockFlow(element) {}
LayoutRubyText::~LayoutRubyText() {}
bool LayoutRubyText::isChildAllowed(LayoutObject* child,
const ComputedStyle&) const {
return child->isInline();
}
ETextAlign LayoutRubyText::textAlignmentForLine(bool endsWithSoftBreak) const {
ETextAlign textAlign = style()->textAlign();
// FIXME: This check is bogus since user can set the initial value.
if (textAlign != ComputedStyle::initialTextAlign())
return LayoutBlockFlow::textAlignmentForLine(endsWithSoftBreak);
// The default behavior is to allow ruby text to expand if it is shorter than
// the ruby base.
return ETextAlign::kJustify;
}
void LayoutRubyText::adjustInlineDirectionLineBounds(
unsigned expansionOpportunityCount,
LayoutUnit& logicalLeft,
LayoutUnit& logicalWidth) const {
ETextAlign textAlign = style()->textAlign();
// FIXME: This check is bogus since user can set the initial value.
if (textAlign != ComputedStyle::initialTextAlign())
return LayoutBlockFlow::adjustInlineDirectionLineBounds(
expansionOpportunityCount, logicalLeft, logicalWidth);
int maxPreferredLogicalWidth = this->maxPreferredLogicalWidth().toInt();
if (maxPreferredLogicalWidth >= logicalWidth)
return;
// Inset the ruby text by half the inter-ideograph expansion amount, but no
// more than a full-width ruby character on each side.
LayoutUnit inset = (logicalWidth - maxPreferredLogicalWidth) /
(expansionOpportunityCount + 1);
if (expansionOpportunityCount)
inset = std::min(LayoutUnit(2 * style()->fontSize()), inset);
logicalLeft += inset / 2;
logicalWidth -= inset;
}
bool LayoutRubyText::avoidsFloats() const {
return true;
}
} // namespace blink
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