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/*
* Copyright (C) 2006, 2007, 2008, 2009, 2010 Apple Inc. All rights reserved.
*
* 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 "config.h"
#include "core/rendering/RenderSlider.h"
#include "core/dom/shadow/ShadowRoot.h"
#include "core/html/HTMLInputElement.h"
#include "core/html/shadow/ShadowElementNames.h"
#include "core/html/shadow/SliderThumbElement.h"
#include "wtf/MathExtras.h"
using std::min;
namespace WebCore {
const int RenderSlider::defaultTrackLength = 129;
RenderSlider::RenderSlider(HTMLInputElement* element)
: RenderFlexibleBox(element)
{
// We assume RenderSlider works only with <input type=range>.
ASSERT(element->isRangeControl());
}
RenderSlider::~RenderSlider()
{
}
int RenderSlider::baselinePosition(FontBaseline, bool /*firstLine*/, LineDirectionMode, LinePositionMode linePositionMode) const
{
ASSERT(linePositionMode == PositionOnContainingLine);
// FIXME: Patch this function for writing-mode.
return height() + marginTop();
}
void RenderSlider::computeIntrinsicLogicalWidths(LayoutUnit& minLogicalWidth, LayoutUnit& maxLogicalWidth) const
{
maxLogicalWidth = defaultTrackLength * style()->effectiveZoom();
if (!style()->width().isPercent())
minLogicalWidth = maxLogicalWidth;
}
void RenderSlider::computePreferredLogicalWidths()
{
m_minPreferredLogicalWidth = 0;
m_maxPreferredLogicalWidth = 0;
RenderStyle* styleToUse = style();
if (styleToUse->width().isFixed() && styleToUse->width().value() > 0)
m_minPreferredLogicalWidth = m_maxPreferredLogicalWidth = adjustContentBoxLogicalWidthForBoxSizing(styleToUse->width().value());
else
computeIntrinsicLogicalWidths(m_minPreferredLogicalWidth, m_maxPreferredLogicalWidth);
if (styleToUse->minWidth().isFixed() && styleToUse->minWidth().value() > 0) {
m_maxPreferredLogicalWidth = max(m_maxPreferredLogicalWidth, adjustContentBoxLogicalWidthForBoxSizing(styleToUse->minWidth().value()));
m_minPreferredLogicalWidth = max(m_minPreferredLogicalWidth, adjustContentBoxLogicalWidthForBoxSizing(styleToUse->minWidth().value()));
}
if (styleToUse->maxWidth().isFixed()) {
m_maxPreferredLogicalWidth = min(m_maxPreferredLogicalWidth, adjustContentBoxLogicalWidthForBoxSizing(styleToUse->maxWidth().value()));
m_minPreferredLogicalWidth = min(m_minPreferredLogicalWidth, adjustContentBoxLogicalWidthForBoxSizing(styleToUse->maxWidth().value()));
}
LayoutUnit toAdd = borderAndPaddingWidth();
m_minPreferredLogicalWidth += toAdd;
m_maxPreferredLogicalWidth += toAdd;
clearPreferredLogicalWidthsDirty();
}
inline SliderThumbElement* RenderSlider::sliderThumbElement() const
{
return toSliderThumbElement(toElement(node())->userAgentShadowRoot()->getElementById(ShadowElementNames::sliderThumb()));
}
void RenderSlider::layout()
{
// FIXME: Find a way to cascade appearance.
// http://webkit.org/b/62535
RenderBox* thumbBox = sliderThumbElement()->renderBox();
if (thumbBox && thumbBox->isSliderThumb())
static_cast<RenderSliderThumb*>(thumbBox)->updateAppearance(style());
RenderFlexibleBox::layout();
}
bool RenderSlider::inDragMode() const
{
return sliderThumbElement()->active();
}
} // namespace WebCore
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