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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/NodeRenderStyle.h"
39 #include "core/dom/StyleEngine.h"
40 #include "core/editing/FrameSelection.h"
41 #include "core/frame/FrameView.h"
42 #include "core/frame/LocalFrame.h"
43 #include "core/html/HTMLOptGroupElement.h"
44 #include "core/html/HTMLOptionElement.h"
45 #include "core/html/HTMLSelectElement.h"
46 #include "core/page/EventHandler.h"
47 #include "core/page/FocusController.h"
48 #include "core/page/Page.h"
49 #include "core/page/SpatialNavigation.h"
50 #include "core/rendering/HitTestResult.h"
51 #include "core/rendering/PaintInfo.h"
52 #include "core/rendering/RenderScrollbar.h"
53 #include "core/rendering/RenderText.h"
54 #include "core/rendering/RenderTheme.h"
55 #include "core/rendering/RenderView.h"
56 #include "core/rendering/TextRunConstructor.h"
57 #include "platform/fonts/FontCache.h"
58 #include "platform/graphics/GraphicsContext.h"
59 #include "platform/scroll/Scrollbar.h"
60 #include "platform/text/BidiTextRun.h"
65 using namespace HTMLNames;
67 // The minSize constant was originally defined to render scrollbars correctly.
68 // This might vary for different platforms.
69 const int minSize = 4;
71 // Default size when the multiple attribute is present but size attribute is absent.
72 const int defaultSize = 4;
74 const int defaultPaddingBottom = 1;
76 RenderListBox::RenderListBox(Element* element)
77 : RenderBlockFlow(element)
80 ASSERT(element->isHTMLElement());
81 ASSERT(isHTMLSelectElement(element));
84 RenderListBox::~RenderListBox()
88 inline HTMLSelectElement* RenderListBox::selectElement() const
90 return toHTMLSelectElement(node());
93 int RenderListBox::size() const
95 int specifiedSize = selectElement()->size();
96 if (specifiedSize > 1)
97 return max(minSize, specifiedSize);
102 LayoutUnit RenderListBox::defaultItemHeight() const
104 return style()->fontMetrics().height() + defaultPaddingBottom;
107 LayoutUnit RenderListBox::itemHeight() const
109 HTMLSelectElement* select = selectElement();
112 RenderObject* baseItemRenderer = firstChild();
113 if (!baseItemRenderer)
114 return defaultItemHeight();
115 if (baseItemRenderer->node() && isHTMLOptGroupElement(baseItemRenderer->node()))
116 baseItemRenderer = baseItemRenderer->slowFirstChild();
117 if (!baseItemRenderer || !baseItemRenderer->isBox())
118 return defaultItemHeight();
119 return toRenderBox(baseItemRenderer)->height();
122 void RenderListBox::computeLogicalHeight(LayoutUnit, LayoutUnit logicalTop, LogicalExtentComputedValues& computedValues) const
124 LayoutUnit height = itemHeight() * size();
125 // FIXME: The item height should have been added before updateLogicalHeight was called to avoid this hack.
126 updateIntrinsicContentLogicalHeight(height);
128 height += borderAndPaddingHeight();
130 RenderBox::computeLogicalHeight(height, logicalTop, computedValues);
133 void RenderListBox::stopAutoscroll()
135 HTMLSelectElement* select = selectElement();
136 if (select->isDisabledFormControl())
138 select->handleMouseRelease();