125 lines
3.7 KiB
C++
125 lines
3.7 KiB
C++
/*
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* Copyright (C) 2006, 2007, 2008, 2009, 2010 Apple Inc. All rights reserved.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public License
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* along with this library; see the file COPYING.LIB. If not, write to
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* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*
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*/
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#include "config.h"
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#include "RenderSlider.h"
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#include "CSSPropertyNames.h"
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#include "Document.h"
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#include "Event.h"
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#include "Frame.h"
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#include "HTMLInputElement.h"
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#include "HTMLNames.h"
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#include "HTMLParserIdioms.h"
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#include "MouseEvent.h"
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#include "Node.h"
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#include "RenderLayer.h"
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#include "RenderTheme.h"
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#include "RenderView.h"
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#include "ShadowRoot.h"
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#include "SliderThumbElement.h"
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#include "StepRange.h"
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#include "StyleResolver.h"
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#include <wtf/IsoMallocInlines.h>
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#include <wtf/MathExtras.h>
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#include <wtf/StackStats.h>
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namespace WebCore {
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WTF_MAKE_ISO_ALLOCATED_IMPL(RenderSlider);
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const int RenderSlider::defaultTrackLength = 129;
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RenderSlider::RenderSlider(HTMLInputElement& element, RenderStyle&& style)
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: RenderFlexibleBox(element, WTFMove(style))
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{
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// We assume RenderSlider works only with <input type=range>.
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ASSERT(element.isRangeControl());
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}
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RenderSlider::~RenderSlider() = default;
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HTMLInputElement& RenderSlider::element() const
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{
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return downcast<HTMLInputElement>(nodeForNonAnonymous());
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}
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LayoutUnit RenderSlider::baselinePosition(FontBaseline, bool /*firstLine*/, LineDirectionMode, LinePositionMode) const
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{
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// FIXME: Patch this function for writing-mode.
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return height() + marginTop();
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}
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void RenderSlider::computeIntrinsicLogicalWidths(LayoutUnit& minLogicalWidth, LayoutUnit& maxLogicalWidth) const
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{
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if (shouldApplySizeContainment(*this))
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return;
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maxLogicalWidth = defaultTrackLength * style().effectiveZoom();
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if (!style().width().isPercentOrCalculated())
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minLogicalWidth = maxLogicalWidth;
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}
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void RenderSlider::computePreferredLogicalWidths()
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{
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m_minPreferredLogicalWidth = 0;
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m_maxPreferredLogicalWidth = 0;
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if (style().width().isFixed() && style().width().value() > 0)
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m_minPreferredLogicalWidth = m_maxPreferredLogicalWidth = adjustContentBoxLogicalWidthForBoxSizing(style().width());
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else
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computeIntrinsicLogicalWidths(m_minPreferredLogicalWidth, m_maxPreferredLogicalWidth);
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RenderBox::computePreferredLogicalWidths(style().minWidth(), style().maxWidth(), horizontalBorderAndPaddingExtent());
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setPreferredLogicalWidthsDirty(false);
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}
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void RenderSlider::layout()
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{
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StackStats::LayoutCheckPoint layoutCheckPoint;
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// FIXME: Find a way to cascade appearance. http://webkit.org/b/62535
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RenderBox* thumbBox = element().sliderThumbElement()->renderBox();
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if (thumbBox && thumbBox->isSliderThumb())
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static_cast<RenderSliderThumb*>(thumbBox)->updateAppearance(&style());
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RenderFlexibleBox::layout();
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}
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bool RenderSlider::inDragMode() const
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{
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return element().sliderThumbElement()->active();
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}
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double RenderSlider::valueRatio() const
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{
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auto& element = this->element();
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auto min = element.minimum();
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auto max = element.maximum();
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auto value = element.valueAsNumber();
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if (max <= min)
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return 0;
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return (value - min) / (max - min);
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}
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} // namespace WebCore
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