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Side by Side Diff: views/view_text_utils.h

Issue 8771006: views: Move the remaining file from views/ to ui/views/. (Closed) Base URL: svn://svn.chromium.org/chrome/trunk/src
Patch Set: Created 9 years ago
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1 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4 //
5 // This file defines utility functions for working with text in views.
6
7 #ifndef VIEWS_VIEW_TEXT_UTILS_H_
8 #define VIEWS_VIEW_TEXT_UTILS_H_
9 #pragma once
10
11 #include "base/string16.h"
12 #include "views/views_export.h"
13
14 namespace gfx {
15 class Canvas;
16 class Font;
17 class Rect;
18 class Size;
19 }
20
21 namespace views {
22 class Label;
23 class Link;
24 }
25
26 namespace view_text_utils {
27
28 // Draws a string onto the canvas (wrapping if needed) while also keeping
29 // track of where it ends so we can position a URL after the text. The
30 // parameter |bounds| represents the boundary we have to work with, |position|
31 // specifies where to draw the string (relative to the top left corner of the
32 // |bounds| rectangle and |font| specifies the font to use when drawing. When
33 // the function returns, the parameter |rect| contains where to draw the URL
34 // (to the right of where we just drew the text) and |position| is updated to
35 // reflect where to draw the next string after the URL. |label| is a dummy
36 // label with the correct width and origin for the text to be written; it's
37 // used so that the x position can be correctly mirrored in RTL languages.
38 // |text_direction_is_rtl| is true if an RTL language is being used.
39 // NOTE: The reason why we need this function is because while Skia knows how
40 // to wrap text appropriately, it doesn't tell us where it drew the last
41 // character, which we need to position the URLs within the text.
42 VIEWS_EXPORT void DrawTextAndPositionUrl(gfx::Canvas* canvas,
43 views::Label* label,
44 const string16& text,
45 views::Link* link,
46 gfx::Rect* rect,
47 gfx::Size* position,
48 bool text_direction_is_rtl,
49 const gfx::Rect& bounds,
50 const gfx::Font& font);
51
52 // A helper function for DrawTextAndPositionUrl, which simply draws the text
53 // from a certain starting point |position| and wraps within bounds.
54 // |word_for_word| specifies whether to draw the text word for word or whether
55 // to treat the text as one blurb (similar to the way URL's are treated inside
56 // RTL text. For details on the other parameters, see DrawTextAndPositionUrl.
57 void DrawTextStartingFrom(gfx::Canvas* canvas,
58 views::Label* label,
59 const string16& text,
60 gfx::Size* position,
61 const gfx::Rect& bounds,
62 const gfx::Font& font,
63 bool text_direction_is_rtl,
64 bool word_for_word);
65
66 // A simply utility function that calculates whether a word of width
67 // |word_width| fits at position |position| within the |bounds| rectangle. If
68 // not, |position| is updated to wrap to the beginning of the next line.
69 void WrapIfWordDoesntFit(int word_width,
70 int font_height,
71 gfx::Size* position,
72 const gfx::Rect& bounds);
73
74 } // namespace view_text_utils
75
76 #endif // CHROME_BROWSER_VIEWS_VIEW_TEXT_UTILS_H_
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