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Issue 3083022: Rework gfx::Font by moving platform-specific code into inner classes.... (Closed) Base URL: svn://svn.chromium.org/chrome/trunk/src/
Patch Set: '' Created 10 years, 4 months ago
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1 // Copyright (c) 2010 The Chromium Authors. All rights reserved. 1 // Copyright (c) 2010 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 #include "views/view_text_utils.h" 5 #include "views/view_text_utils.h"
6 6
7 #include "app/bidi_line_iterator.h" 7 #include "app/bidi_line_iterator.h"
8 #include "base/i18n/word_iterator.h" 8 #include "base/i18n/word_iterator.h"
9 #include "base/logging.h" 9 #include "base/logging.h"
10 #include "base/utf_string_conversions.h" 10 #include "base/utf_string_conversions.h"
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55 text_direction_is_rtl, ltr_inside_rtl_text); 55 text_direction_is_rtl, ltr_inside_rtl_text);
56 56
57 run_start = run_end; // Advance over what we just drew. 57 run_start = run_end; // Advance over what we just drew.
58 } 58 }
59 59
60 // If the caller is interested in placing a link after this text blurb, we 60 // If the caller is interested in placing a link after this text blurb, we
61 // figure out here where to place it. 61 // figure out here where to place it.
62 if (link && rect) { 62 if (link && rect) {
63 gfx::Size sz = link->GetPreferredSize(); 63 gfx::Size sz = link->GetPreferredSize();
64 gfx::Insets insets = link->GetInsets(); 64 gfx::Insets insets = link->GetInsets();
65 WrapIfWordDoesntFit(sz.width(), font.height(), position, bounds); 65 WrapIfWordDoesntFit(sz.width(), font.GetHeight(), position, bounds);
66 int x = position->width(); 66 int x = position->width();
67 int y = position->height(); 67 int y = position->height();
68 68
69 // Links have a border to allow them to be focused. 69 // Links have a border to allow them to be focused.
70 y -= insets.top(); 70 y -= insets.top();
71 71
72 *rect = gfx::Rect(x, y, sz.width(), sz.height()); 72 *rect = gfx::Rect(x, y, sz.width(), sz.height());
73 73
74 // Go from relative pixel coordinates (within the label we are drawing 74 // Go from relative pixel coordinates (within the label we are drawing
75 // on) to absolute pixel coordinates (relative to the top left corner of 75 // on) to absolute pixel coordinates (relative to the top left corner of
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109 // Iterate over each word in the text, or put in a more locale-neutral way: 109 // Iterate over each word in the text, or put in a more locale-neutral way:
110 // iterate to the next line breaking opportunity. 110 // iterate to the next line breaking opportunity.
111 while (iter.Advance()) { 111 while (iter.Advance()) {
112 // Get the word and figure out the dimensions. 112 // Get the word and figure out the dimensions.
113 std::wstring word; 113 std::wstring word;
114 if (!ltr_within_rtl) 114 if (!ltr_within_rtl)
115 word = UTF16ToWide(iter.GetWord()); // Get the next word. 115 word = UTF16ToWide(iter.GetWord()); // Get the next word.
116 else 116 else
117 word = text; // Draw the whole text at once. 117 word = text; // Draw the whole text at once.
118 118
119 int w = font.GetStringWidth(word), h = font.height(); 119 int w = font.GetStringWidth(word), h = font.GetHeight();
120 gfx::CanvasSkia::SizeStringInt(word, font, &w, &h, flags); 120 gfx::CanvasSkia::SizeStringInt(word, font, &w, &h, flags);
121 121
122 // If we exceed the boundaries, we need to wrap. 122 // If we exceed the boundaries, we need to wrap.
123 WrapIfWordDoesntFit(w, font.height(), position, bounds); 123 WrapIfWordDoesntFit(w, font.GetHeight(), position, bounds);
124 124
125 int x = label->MirroredXCoordinateInsideView(position->width()) + 125 int x = label->MirroredXCoordinateInsideView(position->width()) +
126 bounds.x(); 126 bounds.x();
127 if (text_direction_is_rtl) { 127 if (text_direction_is_rtl) {
128 x -= w; 128 x -= w;
129 // When drawing LTR strings inside RTL text we need to make sure we 129 // When drawing LTR strings inside RTL text we need to make sure we
130 // draw the trailing space (if one exists after the LTR text) to the 130 // draw the trailing space (if one exists after the LTR text) to the
131 // left of the LTR string. 131 // left of the LTR string.
132 if (ltr_within_rtl && word[word.size() - 1] == L' ') { 132 if (ltr_within_rtl && word[word.size() - 1] == L' ') {
133 int space_w = font.GetStringWidth(L" "), space_h = font.height(); 133 int space_w = font.GetStringWidth(L" "), space_h = font.GetHeight();
134 gfx::CanvasSkia::SizeStringInt(L" ", font, &space_w, &space_h, flags); 134 gfx::CanvasSkia::SizeStringInt(L" ", font, &space_w, &space_h, flags);
135 x += space_w; 135 x += space_w;
136 } 136 }
137 } 137 }
138 int y = position->height() + bounds.y(); 138 int y = position->height() + bounds.y();
139 139
140 // Draw the text on the screen (mirrored, if RTL run). 140 // Draw the text on the screen (mirrored, if RTL run).
141 canvas->DrawStringInt(word, font, text_color, x, y, w, font.height(), 141 canvas->DrawStringInt(word, font, text_color, x, y, w, font.GetHeight(),
142 flags); 142 flags);
143 143
144 if (word.size() > 0 && word[word.size() - 1] == L'\x0a') { 144 if (word.size() > 0 && word[word.size() - 1] == L'\x0a') {
145 // When we come across '\n', we move to the beginning of the next line. 145 // When we come across '\n', we move to the beginning of the next line.
146 position->set_width(0); 146 position->set_width(0);
147 position->Enlarge(0, font.height()); 147 position->Enlarge(0, font.GetHeight());
148 } else { 148 } else {
149 // Otherwise, we advance position to the next word. 149 // Otherwise, we advance position to the next word.
150 position->Enlarge(w, 0); 150 position->Enlarge(w, 0);
151 } 151 }
152 152
153 if (ltr_within_rtl) 153 if (ltr_within_rtl)
154 break; // LTR within RTL is drawn as one unit, so we are done. 154 break; // LTR within RTL is drawn as one unit, so we are done.
155 } 155 }
156 } 156 }
157 157
158 void WrapIfWordDoesntFit(int word_width, 158 void WrapIfWordDoesntFit(int word_width,
159 int font_height, 159 int font_height,
160 gfx::Size* position, 160 gfx::Size* position,
161 const gfx::Rect& bounds) { 161 const gfx::Rect& bounds) {
162 if (position->width() + word_width > bounds.right()) { 162 if (position->width() + word_width > bounds.right()) {
163 position->set_width(0); 163 position->set_width(0);
164 position->Enlarge(0, font_height); 164 position->Enlarge(0, font_height);
165 } 165 }
166 } 166 }
167 167
168 } // namespace view_text_utils 168 } // namespace view_text_utils
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