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/**
* Copyright (C) 2005 Apple Computer, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*
*/
#include "core/layout/LayoutButton.h"
namespace blink {
using namespace HTMLNames;
LayoutButton::LayoutButton(Element* element)
: LayoutFlexibleBox(element)
, m_inner(nullptr)
{
}
LayoutButton::~LayoutButton()
{
}
void LayoutButton::addChild(LayoutObject* newChild, LayoutObject* beforeChild)
{
if (!m_inner) {
// Create an anonymous block.
ASSERT(!firstChild());
m_inner = createAnonymousBlock(style()->display());
LayoutFlexibleBox::addChild(m_inner);
}
m_inner->addChild(newChild, beforeChild);
}
void LayoutButton::removeChild(LayoutObject* oldChild)
{
if (oldChild == m_inner || !m_inner) {
LayoutFlexibleBox::removeChild(oldChild);
m_inner = 0;
} else if (oldChild->parent() == this) {
// We aren't the inner node, but we're getting removed from the button, this
// can happen with things like scrollable area resizer's.
LayoutFlexibleBox::removeChild(oldChild);
} else {
m_inner->removeChild(oldChild);
}
}
void LayoutButton::updateAnonymousChildStyle(const LayoutObject& child, ComputedStyle& childStyle) const
{
ASSERT(!m_inner || &child == m_inner);
childStyle.setFlexGrow(1.0f);
// min-width: 0; is needed for correct shrinking.
childStyle.setMinWidth(Length(0, Fixed));
// Use margin:auto instead of align-items:center to get safe centering, i.e.
// when the content overflows, treat it the same as align-items: flex-start.
childStyle.setMarginTop(Length());
childStyle.setMarginBottom(Length());
childStyle.setFlexDirection(style()->flexDirection());
childStyle.setJustifyContent(style()->justifyContent());
childStyle.setFlexWrap(style()->flexWrap());
childStyle.setAlignItems(style()->alignItems());
childStyle.setAlignContent(style()->alignContent());
}
LayoutRect LayoutButton::controlClipRect(const LayoutPoint& additionalOffset) const
{
// Clip to the padding box to at least give content the extra padding space.
LayoutRect rect(additionalOffset, size());
rect.expand(borderInsets());
return rect;
}
int LayoutButton::baselinePosition(FontBaseline baseline, bool firstLine, LineDirectionMode direction, LinePositionMode linePositionMode) const
{
ASSERT(linePositionMode == PositionOnContainingLine);
// We want to call the LayoutBlock version of firstLineBoxBaseline to
// avoid LayoutFlexibleBox synthesizing a baseline that we don't want.
// We use this check as a proxy for "are there any line boxes in this button"
if (!hasLineIfEmpty() && LayoutBlock::firstLineBoxBaseline() == -1) {
// To ensure that we have a consistent baseline when we have no children,
// even when we have the anonymous LayoutBlock child, we calculate the
// baseline for the empty case manually here.
if (direction == HorizontalLine) {
return marginTop() + size().height() - borderBottom() - paddingBottom() - horizontalScrollbarHeight();
}
return marginRight() + size().width() - borderLeft() - paddingLeft() - verticalScrollbarWidth();
}
return LayoutFlexibleBox::baselinePosition(baseline, firstLine, direction, linePositionMode);
}
// For compatibility with IE/FF we only clip overflow on input elements.
bool LayoutButton::hasControlClip() const
{
return !isHTMLButtonElement(node());
}
} // namespace blink
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