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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 "RenderSlider.h"
#include "CSSPropertyNames.h"
#include "Document.h"
#include "Event.h"
#include "EventHandler.h"
#include "EventNames.h"
#include "Frame.h"
#include "HTMLInputElement.h"
#include "HTMLNames.h"
#include "HTMLParserIdioms.h"
#include "MediaControlElements.h"
#include "MouseEvent.h"
#include "Node.h"
#include "RenderLayer.h"
#include "RenderTheme.h"
#include "RenderView.h"
#include "ShadowRoot.h"
#include "SliderThumbElement.h"
#include "StepRange.h"
#include "StyleResolver.h"
#include <wtf/MathExtras.h>
using std::min;
namespace WebCore {
static const int defaultTrackLength = 129;
RenderSlider::RenderSlider(HTMLInputElement* element)
: RenderBlock(element)
{
// We assume RenderSlider works only with <input type=range>.
ASSERT(element->isRangeControl());
}
RenderSlider::~RenderSlider()
{
}
bool RenderSlider::canBeReplacedWithInlineRunIn() const
{
return false;
}
LayoutUnit RenderSlider::baselinePosition(FontBaseline, bool /*firstLine*/, LineDirectionMode, LinePositionMode) const
{
// FIXME: Patch this function for writing-mode.
return height() + marginTop();
}
void RenderSlider::computePreferredLogicalWidths()
{
m_minPreferredLogicalWidth = 0;
m_maxPreferredLogicalWidth = 0;
if (style()->width().isFixed() && style()->width().value() > 0)
m_minPreferredLogicalWidth = m_maxPreferredLogicalWidth = computeContentBoxLogicalWidth(style()->width().value());
else
m_maxPreferredLogicalWidth = defaultTrackLength * style()->effectiveZoom();
if (style()->minWidth().isFixed() && style()->minWidth().value() > 0) {
m_maxPreferredLogicalWidth = max(m_maxPreferredLogicalWidth, computeContentBoxLogicalWidth(style()->minWidth().value()));
m_minPreferredLogicalWidth = max(m_minPreferredLogicalWidth, computeContentBoxLogicalWidth(style()->minWidth().value()));
} else if (style()->width().isPercent() || (style()->width().isAuto() && style()->height().isPercent()))
m_minPreferredLogicalWidth = 0;
else
m_minPreferredLogicalWidth = m_maxPreferredLogicalWidth;
if (style()->maxWidth().isFixed()) {
m_maxPreferredLogicalWidth = min(m_maxPreferredLogicalWidth, computeContentBoxLogicalWidth(style()->maxWidth().value()));
m_minPreferredLogicalWidth = min(m_minPreferredLogicalWidth, computeContentBoxLogicalWidth(style()->maxWidth().value()));
}
LayoutUnit toAdd = borderAndPaddingWidth();
m_minPreferredLogicalWidth += toAdd;
m_maxPreferredLogicalWidth += toAdd;
setPreferredLogicalWidthsDirty(false);
}
void RenderSlider::layout()
{
// FIXME: Find a way to cascade appearance.
// http://webkit.org/b/62535
RenderBox* thumbBox = sliderThumbElementOf(node())->renderBox();
if (thumbBox && thumbBox->isSliderThumb())
static_cast<RenderSliderThumb*>(thumbBox)->updateAppearance(style());
if (RenderObject* limiterRenderer = trackLimiterElementOf(node())->renderer()) {
if (limiterRenderer->isSliderThumb())
static_cast<RenderSliderThumb*>(limiterRenderer)->updateAppearance(style());
}
RenderBlock::layout();
if (!thumbBox)
return;
LayoutUnit heightDiff = thumbBox->height() - contentHeight();
if (heightDiff > 0)
thumbBox->setY(thumbBox->y() - (heightDiff / 2));
}
bool RenderSlider::inDragMode() const
{
return sliderThumbElementOf(node())->active();
}
} // namespace WebCore
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