Implement select listbox using shadow DOM

Source/core/rendering/RenderListBox.h

Index: Source/core/rendering/RenderListBox.h
diff --git a/Source/core/rendering/RenderListBox.h b/Source/core/rendering/RenderListBox.h
index 9a99eab5f179f79c9458d7a1b5389b76e6aa304b..ce76e18ab0388fb2b8ad50ecb6c43aab35a25e99 100644
--- a/Source/core/rendering/RenderListBox.h
+++ b/Source/core/rendering/RenderListBox.h
@@ -32,28 +32,16 @@
 #define RenderListBox_h
 
 #include "core/rendering/RenderBlockFlow.h"
-#include "platform/scroll/ScrollableArea.h"
 
 namespace WebCore {
 
 class HTMLSelectElement;
 
-class RenderListBox FINAL : public RenderBlockFlow, private ScrollableArea {
+class RenderListBox FINAL : public RenderBlockFlow {
 public:
     explicit RenderListBox(Element*);
     virtual ~RenderListBox();
 
-    void selectionChanged();
-
-    void setOptionsChanged(bool changed) { m_optionsChanged = changed; }
-
-    int listIndexAtOffset(const LayoutSize&) const;
-    LayoutRect itemBoundingBoxRect(const LayoutPoint&, int index) const;
-
-    bool scrollToRevealElementAtListIndex(int index);
-
-    int scrollToward(const IntPoint&); // Returns the new index or -1 if no scroll occurred
-
     int size() const;
 
     void repaintScrollbarIfNeeded();
@@ -64,105 +52,16 @@ private:
     virtual const char* renderName() const OVERRIDE { return "RenderListBox"; }
 
     virtual bool isListBox() const OVERRIDE { return true; }
-    virtual bool isChildAllowed(RenderObject*, RenderStyle*) const OVERRIDE;
-
-    virtual void updateFromElement() OVERRIDE;
-    virtual bool hasControlClip() const OVERRIDE { return true; }
-    virtual void paintObject(PaintInfo&, const LayoutPoint&) OVERRIDE;
-    virtual LayoutRect controlClipRect(const LayoutPoint&) const OVERRIDE;
-
-    virtual bool isPointInOverflowControl(HitTestResult&, const LayoutPoint& locationInContainer, const LayoutPoint& accumulatedOffset) OVERRIDE;
 
-    virtual bool scroll(ScrollDirection, ScrollGranularity, float) OVERRIDE;
-
-    virtual void computeIntrinsicLogicalWidths(LayoutUnit& minLogicalWidth, LayoutUnit& maxLogicalWidth) const OVERRIDE;
-    virtual void computePreferredLogicalWidths() OVERRIDE;
-    virtual int baselinePosition(FontBaseline, bool firstLine, LineDirectionMode, LinePositionMode = PositionOnContainingLine) const OVERRIDE;
     virtual void computeLogicalHeight(LayoutUnit logicalHeight, LayoutUnit logicalTop, LogicalExtentComputedValues&) const OVERRIDE;
-
-    virtual void layout() OVERRIDE;
-
-    virtual void invalidateTreeAfterLayout(const RenderLayerModelObject&) OVERRIDE FINAL;
-
-    virtual void addFocusRingRects(Vector<IntRect>&, const LayoutPoint& additionalOffset, const RenderLayerModelObject* paintContainer = 0) OVERRIDE;
-
-    virtual bool canBeProgramaticallyScrolled() const OVERRIDE { return true; }
-    virtual void autoscroll(const IntPoint&) OVERRIDE;
     virtual void stopAutoscroll() OVERRIDE;
 
-    virtual void panScroll(const IntPoint&) OVERRIDE;
-
-    virtual int verticalScrollbarWidth() const OVERRIDE;
-    virtual LayoutUnit scrollLeft() const OVERRIDE;
-    virtual LayoutUnit scrollTop() const OVERRIDE;
-    virtual LayoutUnit scrollWidth() const OVERRIDE;
-    virtual LayoutUnit scrollHeight() const OVERRIDE;
-    virtual void setScrollLeft(LayoutUnit) OVERRIDE;
-    virtual void setScrollTop(LayoutUnit) OVERRIDE;
-
-    virtual bool nodeAtPoint(const HitTestRequest&, HitTestResult&, const HitTestLocation& locationInContainer, const LayoutPoint& accumulatedOffset, HitTestAction) OVERRIDE;
-
-    // ScrollableArea interface.
-    virtual int scrollSize(ScrollbarOrientation) const OVERRIDE;
-    virtual IntPoint scrollPosition() const OVERRIDE;
-    virtual void setScrollOffset(const IntPoint&) OVERRIDE;
-    virtual void invalidateScrollbarRect(Scrollbar*, const IntRect&) OVERRIDE;
-    virtual bool isActive() const OVERRIDE;
-    virtual bool isScrollCornerVisible() const OVERRIDE { return false; } // We don't support resize on list boxes yet. If we did these would have to change.
-    virtual IntRect scrollCornerRect() const OVERRIDE { return IntRect(); }
-    virtual void invalidateScrollCornerRect(const IntRect&) OVERRIDE { }
-    virtual IntRect convertFromScrollbarToContainingView(const Scrollbar*, const IntRect&) const OVERRIDE;
-    virtual IntRect convertFromContainingViewToScrollbar(const Scrollbar*, const IntRect&) const OVERRIDE;
-    virtual IntPoint convertFromScrollbarToContainingView(const Scrollbar*, const IntPoint&) const OVERRIDE;
-    virtual IntPoint convertFromContainingViewToScrollbar(const Scrollbar*, const IntPoint&) const OVERRIDE;
-    virtual Scrollbar* verticalScrollbar() const OVERRIDE { return m_vBar.get(); }
-    virtual IntSize contentsSize() const OVERRIDE;
-    virtual int visibleHeight() const OVERRIDE;
-    virtual int visibleWidth() const OVERRIDE;
-    virtual IntPoint lastKnownMousePosition() const OVERRIDE;
-    virtual bool shouldSuspendScrollAnimations() const OVERRIDE;
-    virtual bool scrollbarsCanBeActive() const OVERRIDE;
-    virtual IntPoint minimumScrollPosition() const OVERRIDE;
-    virtual IntPoint maximumScrollPosition() const OVERRIDE;
-    virtual bool userInputScrollable(ScrollbarOrientation) const OVERRIDE;
-    virtual bool shouldPlaceVerticalScrollbarOnLeft() const OVERRIDE;
-    virtual int lineStep(ScrollbarOrientation) const OVERRIDE;
-    virtual int pageStep(ScrollbarOrientation) const OVERRIDE;
-    virtual float pixelStep(ScrollbarOrientation) const OVERRIDE;
-    virtual IntRect scrollableAreaBoundingBox() const OVERRIDE;
-
-    LayoutRect itemBoundingBoxRectInternal(const LayoutPoint&, int index) const;
-    bool scrollToRevealElementAtListIndexInternal(int index);
-
-    // NOTE: This should only be called by the overriden setScrollOffset from ScrollableArea.
-    void scrollTo(int newOffset);
-
     void setHasVerticalScrollbar(bool hasScrollbar);
     PassRefPtr<Scrollbar> createScrollbar();
     void destroyScrollbar();
 
+    LayoutUnit defaultItemHeight() const;
     LayoutUnit itemHeight() const;
-    int numVisibleItems() const;
-    bool listIndexIsVisible(int index) const;
-    int numItems() const;
-    LayoutUnit listHeight() const;
-    int scrollbarLeft() const;
-    void paintScrollbar(PaintInfo&, const LayoutPoint&);
-    void paintItemForeground(PaintInfo&, const LayoutPoint&, int listIndex);
-    void paintItemBackground(PaintInfo&, const LayoutPoint&, int listIndex);
-    void scrollToRevealSelection();
-
-    int renderListBoxIndexToListIndex(int index) const;
-    int listIndexToRenderListBoxIndex(int index) const;
-
-    bool m_optionsChanged;
-    bool m_scrollToRevealSelectionAfterLayout;
-    bool m_inAutoscroll;
-    int m_optionsWidth;
-    int m_indexOffset;
-    int m_listItemCount;
-
-    RefPtr<Scrollbar> m_vBar;
 };
 
 DEFINE_RENDER_OBJECT_TYPE_CASTS(RenderListBox, isListBox());