2 * This file is part of the select element renderer in WebCore.
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31 #ifndef RenderListBox_h
32 #define RenderListBox_h
34 #include "core/rendering/RenderBlockFlow.h"
35 #include "platform/scroll/ScrollableArea.h"
39 class HTMLSelectElement;
41 class RenderListBox FINAL : public RenderBlockFlow, private ScrollableArea {
43 explicit RenderListBox(Element*);
44 virtual ~RenderListBox();
46 void selectionChanged();
48 void setOptionsChanged(bool changed) { m_optionsChanged = changed; }
50 int listIndexAtOffset(const LayoutSize&) const;
51 LayoutRect itemBoundingBoxRect(const LayoutPoint&, int index) const;
53 bool scrollToRevealElementAtListIndex(int index);
55 int scrollToward(const IntPoint&); // Returns the new index or -1 if no scroll occurred
59 void repaintScrollbarIfNeeded();
62 HTMLSelectElement* selectElement() const;
64 virtual const char* renderName() const OVERRIDE { return "RenderListBox"; }
66 virtual bool isListBox() const OVERRIDE { return true; }
67 virtual bool isChildAllowed(RenderObject*, RenderStyle*) const OVERRIDE;
69 virtual void updateFromElement() OVERRIDE;
70 virtual bool hasControlClip() const OVERRIDE { return true; }
71 virtual void paintObject(PaintInfo&, const LayoutPoint&) OVERRIDE;
72 virtual LayoutRect controlClipRect(const LayoutPoint&) const OVERRIDE;
74 virtual bool isPointInOverflowControl(HitTestResult&, const LayoutPoint& locationInContainer, const LayoutPoint& accumulatedOffset) OVERRIDE;
76 virtual bool scroll(ScrollDirection, ScrollGranularity, float) OVERRIDE;
78 virtual void computeIntrinsicLogicalWidths(LayoutUnit& minLogicalWidth, LayoutUnit& maxLogicalWidth) const OVERRIDE;
79 virtual void computePreferredLogicalWidths() OVERRIDE;
80 virtual int baselinePosition(FontBaseline, bool firstLine, LineDirectionMode, LinePositionMode = PositionOnContainingLine) const OVERRIDE;
81 virtual void computeLogicalHeight(LayoutUnit logicalHeight, LayoutUnit logicalTop, LogicalExtentComputedValues&) const OVERRIDE;
83 virtual void layout() OVERRIDE;
85 virtual void repaintTreeAfterLayout() OVERRIDE FINAL;
87 virtual void addFocusRingRects(Vector<IntRect>&, const LayoutPoint& additionalOffset, const RenderLayerModelObject* paintContainer = 0) OVERRIDE;
89 virtual bool canBeProgramaticallyScrolled() const OVERRIDE { return true; }
90 virtual void autoscroll(const IntPoint&) OVERRIDE;
91 virtual void stopAutoscroll() OVERRIDE;
93 virtual void panScroll(const IntPoint&) OVERRIDE;
95 virtual int verticalScrollbarWidth() const OVERRIDE;
96 virtual int scrollLeft() const OVERRIDE;
97 virtual int scrollTop() const OVERRIDE;
98 virtual int scrollWidth() const OVERRIDE;
99 virtual int scrollHeight() const OVERRIDE;
100 virtual void setScrollLeft(int) OVERRIDE;
101 virtual void setScrollTop(int) OVERRIDE;
103 virtual bool nodeAtPoint(const HitTestRequest&, HitTestResult&, const HitTestLocation& locationInContainer, const LayoutPoint& accumulatedOffset, HitTestAction) OVERRIDE;
105 // ScrollableArea interface.
106 virtual int scrollSize(ScrollbarOrientation) const OVERRIDE;
107 virtual IntPoint scrollPosition() const OVERRIDE;
108 virtual void setScrollOffset(const IntPoint&) OVERRIDE;
109 virtual void invalidateScrollbarRect(Scrollbar*, const IntRect&) OVERRIDE;
110 virtual bool isActive() const OVERRIDE;
111 virtual bool isScrollCornerVisible() const OVERRIDE { return false; } // We don't support resize on list boxes yet. If we did these would have to change.
112 virtual IntRect scrollCornerRect() const OVERRIDE { return IntRect(); }
113 virtual void invalidateScrollCornerRect(const IntRect&) OVERRIDE { }
114 virtual IntRect convertFromScrollbarToContainingView(const Scrollbar*, const IntRect&) const OVERRIDE;
115 virtual IntRect convertFromContainingViewToScrollbar(const Scrollbar*, const IntRect&) const OVERRIDE;
116 virtual IntPoint convertFromScrollbarToContainingView(const Scrollbar*, const IntPoint&) const OVERRIDE;
117 virtual IntPoint convertFromContainingViewToScrollbar(const Scrollbar*, const IntPoint&) const OVERRIDE;
118 virtual Scrollbar* verticalScrollbar() const OVERRIDE { return m_vBar.get(); }
119 virtual IntSize contentsSize() const OVERRIDE;
120 virtual int visibleHeight() const OVERRIDE;
121 virtual int visibleWidth() const OVERRIDE;
122 virtual IntPoint lastKnownMousePosition() const OVERRIDE;
123 virtual bool shouldSuspendScrollAnimations() const OVERRIDE;
124 virtual bool scrollbarsCanBeActive() const OVERRIDE;
125 virtual IntPoint minimumScrollPosition() const OVERRIDE;
126 virtual IntPoint maximumScrollPosition() const OVERRIDE;
127 virtual bool userInputScrollable(ScrollbarOrientation) const OVERRIDE;
128 virtual bool shouldPlaceVerticalScrollbarOnLeft() const OVERRIDE;
129 virtual int lineStep(ScrollbarOrientation) const OVERRIDE;
130 virtual int pageStep(ScrollbarOrientation) const OVERRIDE;
131 virtual float pixelStep(ScrollbarOrientation) const OVERRIDE;
132 virtual IntRect scrollableAreaBoundingBox() const OVERRIDE;
134 LayoutRect itemBoundingBoxRectInternal(const LayoutPoint&, int index) const;
135 bool scrollToRevealElementAtListIndexInternal(int index);
137 // NOTE: This should only be called by the overriden setScrollOffset from ScrollableArea.
138 void scrollTo(int newOffset);
140 void setHasVerticalScrollbar(bool hasScrollbar);
141 PassRefPtr<Scrollbar> createScrollbar();
142 void destroyScrollbar();
144 LayoutUnit itemHeight() const;
145 int numVisibleItems() const;
146 bool listIndexIsVisible(int index) const;
147 int numItems() const;
148 LayoutUnit listHeight() const;
149 int scrollbarLeft() const;
150 void paintScrollbar(PaintInfo&, const LayoutPoint&);
151 void paintItemForeground(PaintInfo&, const LayoutPoint&, int listIndex);
152 void paintItemBackground(PaintInfo&, const LayoutPoint&, int listIndex);
153 void scrollToRevealSelection();
155 int renderListBoxIndexToListIndex(int index) const;
156 int listIndexToRenderListBoxIndex(int index) const;
158 bool m_optionsChanged;
159 bool m_scrollToRevealSelectionAfterLayout;
165 RefPtr<Scrollbar> m_vBar;
168 DEFINE_RENDER_OBJECT_TYPE_CASTS(RenderListBox, isListBox());
170 } // namepace WebCore
172 #endif // RenderListBox_h