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31 #include "core/rendering/RenderListBox.h"
33 #include "core/HTMLNames.h"
34 #include "core/accessibility/AXObjectCache.h"
35 #include "core/css/CSSFontSelector.h"
36 #include "core/css/resolver/StyleResolver.h"
37 #include "core/dom/Document.h"
38 #include "core/dom/ElementTraversal.h"
39 #include "core/dom/NodeRenderStyle.h"
40 #include "core/dom/StyleEngine.h"
41 #include "core/editing/FrameSelection.h"
42 #include "core/frame/FrameView.h"
43 #include "core/frame/LocalFrame.h"
44 #include "core/html/HTMLDivElement.h"
45 #include "core/html/HTMLOptGroupElement.h"
46 #include "core/html/HTMLOptionElement.h"
47 #include "core/html/HTMLSelectElement.h"
48 #include "core/page/EventHandler.h"
49 #include "core/page/FocusController.h"
50 #include "core/page/Page.h"
51 #include "core/page/SpatialNavigation.h"
52 #include "core/rendering/HitTestResult.h"
53 #include "core/rendering/PaintInfo.h"
54 #include "core/rendering/RenderScrollbar.h"
55 #include "core/rendering/RenderLayer.h"
56 #include "core/rendering/RenderText.h"
57 #include "core/rendering/RenderTheme.h"
58 #include "core/rendering/RenderView.h"
59 #include "core/rendering/TextRunConstructor.h"
60 #include "platform/fonts/FontCache.h"
61 #include "platform/graphics/GraphicsContext.h"
62 #include "platform/scroll/Scrollbar.h"
63 #include "platform/text/BidiTextRun.h"
68 using namespace HTMLNames;
70 // Default size when the multiple attribute is present but size attribute is absent.
71 const int defaultSize = 4;
73 const int defaultPaddingBottom = 1;
75 RenderListBox::RenderListBox(Element* element)
76 : RenderBlockFlow(element)
79 ASSERT(element->isHTMLElement());
80 ASSERT(isHTMLSelectElement(element));
83 RenderListBox::~RenderListBox()
87 inline HTMLSelectElement* RenderListBox::selectElement() const
89 return toHTMLSelectElement(node());
92 int RenderListBox::size() const
94 int specifiedSize = selectElement()->size();
95 if (specifiedSize >= 1)
101 LayoutUnit RenderListBox::defaultItemHeight() const
103 return style()->fontMetrics().height() + defaultPaddingBottom;
106 LayoutUnit RenderListBox::itemHeight() const
108 HTMLSelectElement* select = selectElement();
111 Element* baseItem = ElementTraversal::firstChild(*select);
113 return defaultItemHeight();
114 if (isHTMLOptGroupElement(baseItem))
115 baseItem = &toHTMLOptGroupElement(baseItem)->optGroupLabelElement();
116 else if (!isHTMLOptionElement(baseItem))
117 return defaultItemHeight();
118 RenderObject* baseItemRenderer = baseItem->renderer();
119 if (!baseItemRenderer)
120 return defaultItemHeight();
121 if (!baseItemRenderer || !baseItemRenderer->isBox())
122 return defaultItemHeight();
123 return toRenderBox(baseItemRenderer)->height();
126 void RenderListBox::computeLogicalHeight(LayoutUnit, LayoutUnit logicalTop, LogicalExtentComputedValues& computedValues) const
128 LayoutUnit height = itemHeight() * size();
129 // FIXME: The item height should have been added before updateLogicalHeight was called to avoid this hack.
130 updateIntrinsicContentLogicalHeight(height);
132 height += borderAndPaddingHeight();
134 RenderBox::computeLogicalHeight(height, logicalTop, computedValues);
137 void RenderListBox::stopAutoscroll()
139 HTMLSelectElement* select = selectElement();
140 if (select->isDisabledFormControl())
142 select->handleMouseRelease();
145 void RenderListBox::computeIntrinsicLogicalWidths(LayoutUnit& minLogicalWidth, LayoutUnit& maxLogicalWidth) const
147 RenderBlockFlow::computeIntrinsicLogicalWidths(minLogicalWidth, maxLogicalWidth);
148 if (style()->width().isPercent())
152 void RenderListBox::scrollToRect(const LayoutRect& rect)
154 if (hasOverflowClip()) {
156 ASSERT(layer()->scrollableArea());
157 layer()->scrollableArea()->exposeRect(rect, ScrollAlignment::alignToEdgeIfNeeded, ScrollAlignment::alignToEdgeIfNeeded);