1/*
2 * This file is part of the select element renderer in WebCore.
3 *
4 * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
5 * Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
6 *
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Library General Public
9 * License as published by the Free Software Foundation; either
10 * version 2 of the License, or (at your option) any later version.
11 *
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
15 * Library General Public License for more details.
16 *
17 * You should have received a copy of the GNU Library General Public License
18 * along with this library; see the file COPYING.LIB.  If not, write to
19 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
20 * Boston, MA 02110-1301, USA.
21 *
22 */
23
24#ifndef RenderMenuList_h
25#define RenderMenuList_h
26
27#include "core/rendering/RenderFlexibleBox.h"
28#include "platform/PopupMenu.h"
29#include "platform/PopupMenuClient.h"
30#include "platform/geometry/LayoutRect.h"
31
32namespace blink {
33
34class HTMLSelectElement;
35class RenderText;
36
37class RenderMenuList FINAL : public RenderFlexibleBox, private PopupMenuClient {
38
39public:
40    RenderMenuList(Element*);
41    virtual ~RenderMenuList();
42    virtual void destroy() OVERRIDE;
43    virtual void trace(Visitor*) OVERRIDE;
44
45    bool popupIsVisible() const { return m_popupIsVisible; }
46    void showPopup();
47    void hidePopup();
48    PopupMenu* popup() const { return m_popup.get(); }
49
50    void setOptionsChanged(bool changed) { m_optionsChanged = changed; }
51
52    void didSetSelectedIndex(int listIndex);
53
54    String text() const;
55
56    virtual PopupMenuStyle itemStyle(unsigned listIndex) const OVERRIDE;
57
58private:
59    HTMLSelectElement* selectElement() const;
60
61    virtual bool isMenuList() const OVERRIDE { return true; }
62    virtual bool isChildAllowed(RenderObject*, RenderStyle*) const OVERRIDE;
63
64    virtual void addChild(RenderObject* newChild, RenderObject* beforeChild = 0) OVERRIDE;
65    virtual void removeChild(RenderObject*) OVERRIDE;
66    virtual bool createsAnonymousWrapper() const OVERRIDE { return true; }
67
68    virtual void updateFromElement() OVERRIDE;
69
70    virtual LayoutRect controlClipRect(const LayoutPoint&) const OVERRIDE;
71    virtual bool hasControlClip() const OVERRIDE { return true; }
72    virtual bool canHaveGeneratedChildren() const OVERRIDE { return false; }
73
74    virtual const char* renderName() const OVERRIDE { return "RenderMenuList"; }
75
76    virtual void computeIntrinsicLogicalWidths(LayoutUnit& minLogicalWidth, LayoutUnit& maxLogicalWidth) const OVERRIDE;
77    virtual void computePreferredLogicalWidths() OVERRIDE;
78
79    virtual void styleDidChange(StyleDifference, const RenderStyle* oldStyle) OVERRIDE;
80
81    // PopupMenuClient methods
82    virtual void valueChanged(unsigned listIndex, bool fireOnChange = true) OVERRIDE;
83    virtual void selectionChanged(unsigned, bool) OVERRIDE { }
84    virtual void selectionCleared() OVERRIDE { }
85    virtual String itemText(unsigned listIndex) const OVERRIDE;
86    virtual String itemToolTip(unsigned listIndex) const OVERRIDE;
87    virtual String itemAccessibilityText(unsigned listIndex) const OVERRIDE;
88    virtual bool itemIsEnabled(unsigned listIndex) const OVERRIDE;
89    virtual PopupMenuStyle menuStyle() const OVERRIDE;
90    virtual LayoutUnit clientPaddingLeft() const OVERRIDE;
91    virtual LayoutUnit clientPaddingRight() const OVERRIDE;
92    virtual int listSize() const OVERRIDE;
93    virtual int selectedIndex() const OVERRIDE;
94    virtual void popupDidHide() OVERRIDE;
95    virtual bool itemIsSeparator(unsigned listIndex) const OVERRIDE;
96    virtual bool itemIsLabel(unsigned listIndex) const OVERRIDE;
97    virtual bool itemIsSelected(unsigned listIndex) const OVERRIDE;
98    virtual void setTextFromItem(unsigned listIndex) OVERRIDE;
99    virtual void listBoxSelectItem(int listIndex, bool allowMultiplySelections, bool shift, bool fireOnChangeNow = true) OVERRIDE;
100    virtual bool multiple() const OVERRIDE;
101
102    virtual bool hasLineIfEmpty() const OVERRIDE { return true; }
103
104    // Flexbox defines baselines differently than regular blocks.
105    // For backwards compatibility, menulists need to do the regular block behavior.
106    virtual int baselinePosition(FontBaseline baseline, bool firstLine, LineDirectionMode direction, LinePositionMode position) const OVERRIDE
107    {
108        return RenderBlock::baselinePosition(baseline, firstLine, direction, position);
109    }
110    virtual int firstLineBoxBaseline() const OVERRIDE { return RenderBlock::firstLineBoxBaseline(); }
111    virtual int inlineBlockBaseline(LineDirectionMode direction) const OVERRIDE { return RenderBlock::inlineBlockBaseline(direction); }
112
113    void getItemBackgroundColor(unsigned listIndex, Color&, bool& itemHasCustomBackgroundColor) const;
114
115    void createInnerBlock();
116    void adjustInnerStyle();
117    void setText(const String&);
118    void setTextFromOption(int optionIndex);
119    void updateOptionsWidth();
120
121    void didUpdateActiveOption(int optionIndex);
122
123    RawPtrWillBeMember<RenderText> m_buttonText;
124    RawPtrWillBeMember<RenderBlock> m_innerBlock;
125
126    bool m_optionsChanged;
127    int m_optionsWidth;
128
129    int m_lastActiveIndex;
130
131    RefPtr<RenderStyle> m_optionStyle;
132
133    RefPtrWillBeMember<PopupMenu> m_popup;
134    bool m_popupIsVisible;
135};
136
137DEFINE_RENDER_OBJECT_TYPE_CASTS(RenderMenuList, isMenuList());
138
139}
140
141#endif
142