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33 #include "core/rendering/RenderSliderContainer.h"
35 #include "core/dom/shadow/ShadowRoot.h"
36 #include "core/html/HTMLInputElement.h"
37 #include "core/html/parser/HTMLParserIdioms.h"
38 #include "core/html/shadow/ShadowElementNames.h"
39 #include "core/html/shadow/SliderThumbElement.h"
40 #include "core/rendering/RenderFlexibleBox.h"
41 #include "core/rendering/RenderSlider.h"
42 #include "core/rendering/RenderTheme.h"
46 RenderSliderContainer::RenderSliderContainer(SliderContainerElement* element)
47 : RenderFlexibleBox(element)
51 inline static Decimal sliderPosition(HTMLInputElement* element)
53 const StepRange stepRange(element->createStepRange(RejectAny));
54 const Decimal oldValue = parseToDecimalForNumberType(element->value(), stepRange.defaultValue());
55 return stepRange.proportionFromValue(stepRange.clampValue(oldValue));
58 inline static bool hasVerticalAppearance(HTMLInputElement* input)
60 ASSERT(input->renderer());
61 RenderStyle* sliderStyle = input->renderer()->style();
63 return sliderStyle->appearance() == SliderVerticalPart;
66 void RenderSliderContainer::computeLogicalHeight(LayoutUnit logicalHeight, LayoutUnit logicalTop, LogicalExtentComputedValues& computedValues) const
68 HTMLInputElement* input = toHTMLInputElement(node()->shadowHost());
69 bool isVertical = hasVerticalAppearance(input);
71 if (input->renderer()->isSlider() && !isVertical && input->list()) {
72 int offsetFromCenter = RenderTheme::theme().sliderTickOffsetFromTrackCenter();
73 LayoutUnit trackHeight = 0;
74 if (offsetFromCenter < 0) {
75 trackHeight = -2 * offsetFromCenter;
77 int tickLength = RenderTheme::theme().sliderTickSize().height();
78 trackHeight = 2 * (offsetFromCenter + tickLength);
80 float zoomFactor = style()->effectiveZoom();
81 if (zoomFactor != 1.0)
82 trackHeight *= zoomFactor;
84 // FIXME: The trackHeight should have been added before updateLogicalHeight was called to avoid this hack.
85 updateIntrinsicContentLogicalHeight(trackHeight);
87 RenderBox::computeLogicalHeight(trackHeight, logicalTop, computedValues);
91 logicalHeight = RenderSlider::defaultTrackLength;
93 // FIXME: The trackHeight should have been added before updateLogicalHeight was called to avoid this hack.
94 updateIntrinsicContentLogicalHeight(logicalHeight);
96 RenderBox::computeLogicalHeight(logicalHeight, logicalTop, computedValues);
99 void RenderSliderContainer::layout()
101 HTMLInputElement* input = toHTMLInputElement(node()->shadowHost());
102 bool isVertical = hasVerticalAppearance(input);
103 style()->setFlexDirection(isVertical ? FlowColumn : FlowRow);
104 TextDirection oldTextDirection = style()->direction();
106 // FIXME: Work around rounding issues in RTL vertical sliders. We want them to
107 // render identically to LTR vertical sliders. We can remove this work around when
108 // subpixel rendering is enabled on all ports.
109 style()->setDirection(LTR);
112 Element* thumbElement = input->userAgentShadowRoot()->getElementById(ShadowElementNames::sliderThumb());
113 Element* trackElement = input->userAgentShadowRoot()->getElementById(ShadowElementNames::sliderTrack());
114 RenderBox* thumb = thumbElement ? thumbElement->renderBox() : 0;
115 RenderBox* track = trackElement ? trackElement->renderBox() : 0;
117 SubtreeLayoutScope layoutScope(*this);
118 // Force a layout to reset the position of the thumb so the code below doesn't move the thumb to the wrong place.
119 // FIXME: Make a custom Render class for the track and move the thumb positioning code there.
121 layoutScope.setChildNeedsLayout(track);
123 RenderFlexibleBox::layout();
125 style()->setDirection(oldTextDirection);
126 // These should always exist, unless someone mutates the shadow DOM (e.g., in the inspector).
127 if (!thumb || !track)
130 double percentageOffset = sliderPosition(input).toDouble();
131 LayoutUnit availableExtent = isVertical ? track->contentHeight() : track->contentWidth();
132 availableExtent -= isVertical ? thumb->height() : thumb->width();
133 LayoutUnit offset = percentageOffset * availableExtent;
134 LayoutPoint thumbLocation = thumb->location();
136 thumbLocation.setY(thumbLocation.y() + track->contentHeight() - thumb->height() - offset);
137 else if (style()->isLeftToRightDirection())
138 thumbLocation.setX(thumbLocation.x() + offset);
140 thumbLocation.setX(thumbLocation.x() - offset);
141 thumb->setLocation(thumbLocation);
143 // We need one-off invalidation code here because painting of the timeline element does not go through style.
144 // Instead it has a custom implementation in C++ code.
145 // Therefore the style system cannot understand when it needs to be paint invalidated.
146 setShouldDoFullPaintInvalidation();