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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 "HTMLInputElement.h"
#include "HTMLNames.h"
#include "HTMLParserIdioms.h"
#include "LocalFrame.h"
#include "MouseEvent.h"
#include "Node.h"
#include "RenderBoxInlines.h"
#include "RenderBoxModelObjectInlines.h"
#include "RenderElementInlines.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>
#include <wtf/Ref.h>
#include <wtf/RefPtr.h>
#include <wtf/StackStats.h>
#include <wtf/TZoneMallocInlines.h>
namespace WebCore {
WTF_MAKE_TZONE_OR_ISO_ALLOCATED_IMPL(RenderSlider);
const int RenderSlider::defaultTrackLength = 129;
RenderSlider::RenderSlider(HTMLInputElement& element, RenderStyle&& style)
: RenderFlexibleBox(Type::Slider, element, WTFMove(style))
{
// We assume RenderSlider works only with <input type=range>.
ASSERT(element.isRangeControl());
ASSERT(isRenderSlider());
}
RenderSlider::~RenderSlider() = default;
HTMLInputElement& RenderSlider::element() const
{
return downcast<HTMLInputElement>(nodeForNonAnonymous());
}
Ref<HTMLInputElement> RenderSlider::protectedElement() const
{
return downcast<HTMLInputElement>(nodeForNonAnonymous());
}
void RenderSlider::computeIntrinsicLogicalWidths(LayoutUnit& minLogicalWidth, LayoutUnit& maxLogicalWidth) const
{
if (shouldApplySizeOrInlineSizeContainment()) {
if (auto width = explicitIntrinsicInnerLogicalWidth()) {
minLogicalWidth = width.value();
maxLogicalWidth = width.value();
}
return;
}
maxLogicalWidth = defaultTrackLength * style().usedZoom();
auto& logicalWidth = style().logicalWidth();
if (logicalWidth.isCalculated())
minLogicalWidth = std::max(0_lu, Style::evaluate(logicalWidth, 0_lu));
else if (!logicalWidth.isPercent())
minLogicalWidth = maxLogicalWidth;
}
void RenderSlider::computePreferredLogicalWidths()
{
m_minPreferredLogicalWidth = 0;
m_maxPreferredLogicalWidth = 0;
if (auto fixedLogicalWidth = style().logicalWidth().tryFixed())
m_minPreferredLogicalWidth = m_maxPreferredLogicalWidth = adjustContentBoxLogicalWidthForBoxSizing(*fixedLogicalWidth);
else
computeIntrinsicLogicalWidths(m_minPreferredLogicalWidth, m_maxPreferredLogicalWidth);
RenderBox::computePreferredLogicalWidths(style().logicalMinWidth(), style().logicalMaxWidth(), writingMode().isHorizontal() ? horizontalBorderAndPaddingExtent() : verticalBorderAndPaddingExtent());
clearNeedsPreferredWidthsUpdate();
}
bool RenderSlider::inDragMode() const
{
return protectedElement()->protectedSliderThumbElement()->active();
}
double RenderSlider::valueRatio() const
{
Ref element = this->element();
auto min = element->minimum();
auto max = element->maximum();
auto value = element->valueAsNumber();
if (max <= min)
return 0;
return (value - min) / (max - min);
}
} // namespace WebCore
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