1 /*

     2  * This file is part of the select element renderer in WebCore.

     3  *

     4  * Copyright (C) 2006, 2007 Apple Inc. All rights reserved.

     5  *

     6  * Redistribution and use in source and binary forms, with or without

     7  * modification, are permitted provided that the following conditions

     8  * are met:

     9  *

    10  * 1.  Redistributions of source code must retain the above copyright

    11  *     notice, this list of conditions and the following disclaimer. 

    12  * 2.  Redistributions in binary form must reproduce the above copyright

    13  *     notice, this list of conditions and the following disclaimer in the

    14  *     documentation and/or other materials provided with the distribution. 

    15  * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of

    16  *     its contributors may be used to endorse or promote products derived

    17  *     from this software without specific prior written permission. 

    18  *

    19  * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY

    20  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED

    21  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE

    22  * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY

    23  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES

    24  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;

    25  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND

    26  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

    27  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF

    28  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

    29  */

    30 

    31 #ifndef RenderListBox_h

    32 #define RenderListBox_h

    33 

    34 #include "RenderBlock.h"

    35 #include "ScrollBar.h"

    36 

    37 namespace WebCore {

    38 

    39 class HTMLSelectElement;

    40 

    41 class RenderListBox : public RenderBlock, private ScrollbarClient {

    42 public:

    43     RenderListBox(HTMLSelectElement*);

    44     ~RenderListBox();

    45 

    46     virtual const char* renderName() const { return "RenderListBox"; }

    47 

    48     virtual bool isListBox() const { return true; }

    49 

    50     virtual void setStyle(RenderStyle*);

    51     virtual void updateFromElement();

    52 

    53     virtual bool canHaveChildren() const { return false; }

    54 

    55     virtual bool hasControlClip() const { return true; }

    56     virtual void paintObject(PaintInfo&, int tx, int ty);

    57     virtual IntRect controlClipRect(int tx, int ty) const;

    58 

    59     virtual bool isPointInOverflowControl(HitTestResult&, int x, int y, int tx, int ty);

    60 

    61     virtual bool scroll(ScrollDirection, ScrollGranularity, float multiplier = 1.0f);

    62     virtual bool isScrollable() const;

    63 

    64     virtual void calcPrefWidths();

    65     virtual short baselinePosition(bool firstLine, bool isRootLineBox) const;

    66     virtual void calcHeight();

    67 

    68     virtual void layout();

    69 

    70     void selectionChanged();

    71 

    72     void setOptionsChanged(bool changed) { m_optionsChanged = changed; }

    73 

    74     int listIndexAtOffset(int x, int y);

    75 

    76     bool scrollToRevealElementAtListIndex(int index);

    77 

    78     virtual bool shouldAutoscroll() const { return true; }

    79     virtual void autoscroll();

    80     virtual void stopAutoscroll();

    81 

    82     virtual int verticalScrollbarWidth() const;

    83     virtual int scrollLeft() const;

    84     virtual int scrollTop() const;

    85     virtual int scrollWidth() const;

    86     virtual int scrollHeight() const;

    87     virtual void setScrollLeft(int);

    88     virtual void setScrollTop(int);

    89 #if PLATFORM(SYMBIAN)

    90     IntRect itemRect(int tx, int ty, int index) { return itemBoundingBoxRect(tx, ty, index); }

    91     int indexOffset() {return m_indexOffset;}

    92 #endif

    93 

    94 private:

    95     // ScrollbarClient interface.

    96     virtual void valueChanged(Scrollbar*);

    97     virtual IntRect windowClipRect() const;

    98 

    99     int itemHeight() const;

   100     void valueChanged(unsigned listIndex);

   101     int size() const;

   102     int numVisibleItems() const;

   103     int numItems() const;

   104     int listHeight() const;

   105     IntRect itemBoundingBoxRect(int tx, int ty, int index);

   106     void paintScrollbar(PaintInfo&);

   107     void paintItemForeground(PaintInfo&, int tx, int ty, int listIndex);

   108     void paintItemBackground(PaintInfo&, int tx, int ty, int listIndex);

   109     bool listIndexIsVisible(int index);

   110     void scrollToRevealSelection();

   111 

   112     bool m_optionsChanged;

   113     bool m_scrollToRevealSelectionAfterLayout;

   114     bool m_inAutoscroll;

   115     int m_optionsWidth;

   116     int m_indexOffset;

   117 

   118     RefPtr<Scrollbar> m_vBar;

   119 };

   120 

   121 } // namepace WebCore

   122 

   123 #endif // RenderListBox_h