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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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