1 /*
2 * Copyright (C) Research In Motion Limited 2010. All rights reserved.
3 *
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Library General Public
6 * License as published by the Free Software Foundation; either
7 * version 2 of the License, or (at your option) any later version.
8 *
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Library General Public License for more details.
13 *
14 * You should have received a copy of the GNU Library General Public License
15 * along with this library; see the file COPYING.LIB. If not, write to
16 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
17 * Boston, MA 02110-1301, USA.
18 */
19
20 #include "third_party/blink/renderer/core/layout/svg/svg_text_layout_engine_spacing.h"
21
22 #include "third_party/blink/renderer/platform/fonts/font.h"
23 #include "third_party/blink/renderer/platform/text/character.h"
24
25 namespace blink {
26
SVGTextLayoutEngineSpacing(const Font & font,float effective_zoom)27 SVGTextLayoutEngineSpacing::SVGTextLayoutEngineSpacing(const Font& font,
28 float effective_zoom)
29 : font_(font), last_character_(0), effective_zoom_(effective_zoom) {
30 DCHECK(effective_zoom_);
31 }
32
CalculateCSSSpacing(UChar current_character)33 float SVGTextLayoutEngineSpacing::CalculateCSSSpacing(UChar current_character) {
34 UChar last_character = last_character_;
35 last_character_ = current_character;
36
37 if (!font_.GetFontDescription().LetterSpacing() &&
38 !font_.GetFontDescription().WordSpacing())
39 return 0;
40
41 float spacing = font_.GetFontDescription().LetterSpacing();
42 if (font_.GetFontDescription().WordSpacing()) {
43 if (Character::TreatAsSpace(current_character) &&
44 !Character::TreatAsSpace(last_character))
45 spacing += font_.GetFontDescription().WordSpacing();
46 }
47
48 if (effective_zoom_ != 1)
49 spacing = spacing / effective_zoom_;
50
51 return spacing;
52 }
53
54 } // namespace blink
55