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1 // Copyright 2013 The Chromium Authors. All rights reserved. | 1 // Copyright 2013 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #ifndef UI_VIEWS_CONTROLS_STYLED_LABEL_H_ | 5 #ifndef UI_VIEWS_CONTROLS_STYLED_LABEL_H_ |
6 #define UI_VIEWS_CONTROLS_STYLED_LABEL_H_ | 6 #define UI_VIEWS_CONTROLS_STYLED_LABEL_H_ |
7 | 7 |
8 #include <map> | 8 #include <map> |
9 #include <queue> | 9 #include <queue> |
10 | 10 |
11 #include "base/basictypes.h" | 11 #include "base/basictypes.h" |
12 #include "base/string16.h" | 12 #include "base/string16.h" |
13 #include "ui/base/range/range.h" | 13 #include "ui/base/range/range.h" |
14 #include "ui/gfx/size.h" | 14 #include "ui/gfx/size.h" |
15 #include "ui/views/controls/link_listener.h" | 15 #include "ui/views/controls/link_listener.h" |
16 #include "ui/views/view.h" | 16 #include "ui/views/view.h" |
17 | 17 |
18 namespace views { | 18 namespace views { |
19 | 19 |
20 class Link; | 20 class Link; |
21 class StyledLabelListener; | 21 class StyledLabelListener; |
22 | 22 |
23 // A class which can apply mixed styles to a block of text. Currently, text is | 23 // A class which can apply mixed styles to a block of text. Currently, text is |
24 // always multiline, and the only style that may be applied is linkifying ranges | 24 // always multiline, and the only style that may be applied is linkifying ranges |
25 // of text. | 25 // of text. |
26 class VIEWS_EXPORT StyledLabel : public View, public LinkListener { | 26 class VIEWS_EXPORT StyledLabel : public View, public LinkListener { |
27 public: | 27 public: |
| 28 // Parameters that define label style for a styled label's text range. |
| 29 struct RangeStyleInfo { |
| 30 RangeStyleInfo(); |
| 31 ~RangeStyleInfo(); |
| 32 |
| 33 int font_style; |
| 34 string16 tooltip; |
| 35 bool disable_line_wrapping; |
| 36 bool linkify; |
| 37 }; |
| 38 |
28 StyledLabel(const string16& text, StyledLabelListener* listener); | 39 StyledLabel(const string16& text, StyledLabelListener* listener); |
29 virtual ~StyledLabel(); | 40 virtual ~StyledLabel(); |
30 | 41 |
31 // Marks the given range within |text_| as a link. | 42 // Marks the given range within |text_| as a link. |
32 void AddLink(const ui::Range& range); | 43 void AddLink(const ui::Range& range); |
33 | 44 |
| 45 // Marks the given range within |text_| with style defined by |style_info|. |
| 46 void AddStyleRange(const ui::Range& range, const RangeStyleInfo& style_info); |
| 47 |
34 // View implementation: | 48 // View implementation: |
35 virtual gfx::Insets GetInsets() const OVERRIDE; | 49 virtual gfx::Insets GetInsets() const OVERRIDE; |
36 virtual int GetHeightForWidth(int w) OVERRIDE; | 50 virtual int GetHeightForWidth(int w) OVERRIDE; |
37 virtual void Layout() OVERRIDE; | 51 virtual void Layout() OVERRIDE; |
38 | 52 |
39 // LinkListener implementation: | 53 // LinkListener implementation: |
40 virtual void LinkClicked(Link* source, int event_flags) OVERRIDE; | 54 virtual void LinkClicked(Link* source, int event_flags) OVERRIDE; |
41 | 55 |
42 private: | 56 private: |
43 struct LinkRange { | 57 struct StyleRange { |
44 explicit LinkRange(const ui::Range& range) : range(range) {} | 58 StyleRange(const ui::Range& range, |
45 ~LinkRange() {} | 59 const RangeStyleInfo& style_info) |
| 60 : range(range), |
| 61 style_info(style_info) { |
| 62 } |
| 63 ~StyleRange() {} |
46 | 64 |
47 bool operator<(const LinkRange& other) const; | 65 bool operator<(const StyleRange& other) const; |
48 | 66 |
49 ui::Range range; | 67 ui::Range range; |
| 68 RangeStyleInfo style_info; |
50 }; | 69 }; |
51 | 70 |
52 // Calculates how to layout child views, creates them and sets their size | 71 // Calculates how to layout child views, creates them and sets their size |
53 // and position. |width| is the horizontal space, in pixels, that the view | 72 // and position. |width| is the horizontal space, in pixels, that the view |
54 // has to work with. If |dry_run| is true, the view hierarchy is not touched. | 73 // has to work with. If |dry_run| is true, the view hierarchy is not touched. |
55 // The return value is the height in pixels. | 74 // The return value is the height in pixels. |
56 int CalculateAndDoLayout(int width, bool dry_run); | 75 int CalculateAndDoLayout(int width, bool dry_run); |
57 | 76 |
58 // The text to display. | 77 // The text to display. |
59 string16 text_; | 78 string16 text_; |
60 | 79 |
61 // The listener that will be informed of link clicks. | 80 // The listener that will be informed of link clicks. |
62 StyledLabelListener* listener_; | 81 StyledLabelListener* listener_; |
63 | 82 |
64 // The ranges that should be linkified, sorted by start position. | 83 // The ranges that should be linkified, sorted by start position. |
65 std::priority_queue<LinkRange> link_ranges_; | 84 std::priority_queue<StyleRange> style_ranges_; |
66 | 85 |
67 // A mapping from Link* control to the range it corresponds to in |text_|. | 86 // A mapping from a link control to the range it corresponds to in |text_|. |
68 std::map<Link*, ui::Range> link_targets_; | 87 std::map<View*, ui::Range> link_targets_; |
69 | 88 |
70 // This variable saves the result of the last GetHeightForWidth call in order | 89 // This variable saves the result of the last GetHeightForWidth call in order |
71 // to avoid repeated calculation. | 90 // to avoid repeated calculation. |
72 gfx::Size calculated_size_; | 91 gfx::Size calculated_size_; |
73 | 92 |
74 DISALLOW_COPY_AND_ASSIGN(StyledLabel); | 93 DISALLOW_COPY_AND_ASSIGN(StyledLabel); |
75 }; | 94 }; |
76 | 95 |
77 } // namespace views | 96 } // namespace views |
78 | 97 |
79 #endif // UI_VIEWS_CONTROLS_STYLED_LABEL_H_ | 98 #endif // UI_VIEWS_CONTROLS_STYLED_LABEL_H_ |
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