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      1 /*
      2  * This file is part of the select element renderer in WebCore.
      3  *
      4  * Copyright (C) 2006, 2007, 2008, 2009, 2010 Apple Inc. All rights reserved.
      5  *
      6  * This library is free software; you can redistribute it and/or
      7  * modify it under the terms of the GNU Library General Public
      8  * License as published by the Free Software Foundation; either
      9  * version 2 of the License, or (at your option) any later version.
     10  *
     11  * This library is distributed in the hope that it will be useful,
     12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
     13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     14  * Library General Public License for more details.
     15  *
     16  * You should have received a copy of the GNU Library General Public License
     17  * along with this library; see the file COPYING.LIB.  If not, write to
     18  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
     19  * Boston, MA 02110-1301, USA.
     20  *
     21  */
     22 
     23 #ifndef RenderMenuList_h
     24 #define RenderMenuList_h
     25 
     26 #include "PopupMenuClient.h"
     27 #include "RenderFlexibleBox.h"
     28 
     29 #if PLATFORM(MAC)
     30 #define POPUP_MENU_PULLS_DOWN 0
     31 #else
     32 #define POPUP_MENU_PULLS_DOWN 1
     33 #endif
     34 
     35 namespace WebCore {
     36 
     37 class PopupMenu;
     38 class RenderText;
     39 
     40 class RenderMenuList : public RenderFlexibleBox, private PopupMenuClient {
     41 public:
     42     RenderMenuList(Element*);
     43     virtual ~RenderMenuList();
     44 
     45 public:
     46     bool popupIsVisible() const { return m_popupIsVisible; }
     47     void showPopup();
     48     void hidePopup();
     49 
     50     void setOptionsChanged(bool changed) { m_optionsChanged = changed; }
     51 
     52     void didSetSelectedIndex();
     53 
     54     String text() const;
     55 
     56 private:
     57     virtual bool isMenuList() const { return true; }
     58 
     59     virtual void addChild(RenderObject* newChild, RenderObject* beforeChild = 0);
     60     virtual void removeChild(RenderObject*);
     61     virtual bool createsAnonymousWrapper() const { return true; }
     62     virtual bool canHaveChildren() const { return false; }
     63 
     64     virtual void updateFromElement();
     65 
     66     virtual bool hasControlClip() const { return true; }
     67     virtual IntRect controlClipRect(int tx, int ty) const;
     68 
     69     virtual const char* renderName() const { return "RenderMenuList"; }
     70 
     71     virtual void calcPrefWidths();
     72 
     73     virtual void styleDidChange(StyleDifference, const RenderStyle* oldStyle);
     74 
     75     // PopupMenuClient methods
     76     virtual String itemText(unsigned listIndex) const;
     77     virtual String itemToolTip(unsigned listIndex) const;
     78     virtual bool itemIsEnabled(unsigned listIndex) const;
     79     virtual PopupMenuStyle itemStyle(unsigned listIndex) const;
     80     virtual PopupMenuStyle menuStyle() const;
     81     virtual int clientInsetLeft() const;
     82     virtual int clientInsetRight() const;
     83     virtual int clientPaddingLeft() const;
     84     virtual int clientPaddingRight() const;
     85     virtual int listSize() const;
     86     virtual int selectedIndex() const;
     87     virtual void popupDidHide();
     88     virtual bool itemIsSeparator(unsigned listIndex) const;
     89     virtual bool itemIsLabel(unsigned listIndex) const;
     90     virtual bool itemIsSelected(unsigned listIndex) const;
     91     virtual void setTextFromItem(unsigned listIndex);
     92     virtual bool valueShouldChangeOnHotTrack() const { return true; }
     93     virtual bool shouldPopOver() const { return !POPUP_MENU_PULLS_DOWN; }
     94     virtual void valueChanged(unsigned listIndex, bool fireOnChange = true);
     95     virtual FontSelector* fontSelector() const;
     96     virtual HostWindow* hostWindow() const;
     97     virtual PassRefPtr<Scrollbar> createScrollbar(ScrollbarClient*, ScrollbarOrientation, ScrollbarControlSize);
     98 
     99     virtual bool hasLineIfEmpty() const { return true; }
    100 
    101     Color itemBackgroundColor(unsigned listIndex) const;
    102 
    103     void createInnerBlock();
    104     void adjustInnerStyle();
    105     void setText(const String&);
    106     void setTextFromOption(int optionIndex);
    107     void updateOptionsWidth();
    108 
    109     RenderText* m_buttonText;
    110     RenderBlock* m_innerBlock;
    111 
    112     bool m_optionsChanged;
    113     int m_optionsWidth;
    114 
    115     int m_lastSelectedIndex;
    116 
    117     RefPtr<PopupMenu> m_popup;
    118     bool m_popupIsVisible;
    119 };
    120 
    121 inline RenderMenuList* toRenderMenuList(RenderObject* object)
    122 {
    123     ASSERT(!object || object->isMenuList());
    124     return static_cast<RenderMenuList*>(object);
    125 }
    126 
    127 // This will catch anyone doing an unnecessary cast.
    128 void toRenderMenuList(const RenderMenuList*);
    129 
    130 }
    131 
    132 #endif
    133