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1 // Copyright (c) 2006-2008 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 #include <algorithm> | |
6 | |
7 #include "chrome/browser/title_chomper.h" | |
8 | |
9 #include "base/logging.h" | |
10 #include "base/word_iterator.h" | |
11 | |
12 TitleChomper::TitleChomper() { | |
13 } | |
14 | |
15 void TitleChomper::AddTitle(const std::wstring& title) { | |
16 titles_.push_back(title); | |
17 } | |
18 | |
19 void TitleChomper::ChompTitles(std::vector<std::wstring>* chomped_titles) { | |
20 std::vector<std::wstring>::iterator title; | |
21 for (title = titles_.begin(); title != titles_.end(); ++title) { | |
22 std::wstring chomped; | |
23 GenerateChompedTitle(*title, &chomped); | |
24 chomped_titles->push_back(chomped); | |
25 } | |
26 } | |
27 | |
28 void TitleChomper::GenerateChompedTitle(const std::wstring& title, | |
29 std::wstring* chomped_title) { | |
30 // We don't chomp identical titles, since they would chomp to nothing! | |
31 if (title == last_title_) { | |
32 *chomped_title = title; | |
33 last_words_.clear(); | |
34 return; | |
35 } | |
36 last_title_ = title; | |
37 | |
38 // TODO(beng): fix locale | |
39 WordIterator iter(title, WordIterator::BREAK_WORD); | |
40 if (!iter.Init()) | |
41 return; | |
42 | |
43 int chomp_point = 0; | |
44 size_t count = 0; | |
45 | |
46 std::vector<std::wstring> words; | |
47 | |
48 bool record_next_point = false; | |
49 bool found_chomp_point = false; | |
50 | |
51 while (iter.Advance()) { | |
52 if (iter.IsWord()) { | |
53 const std::wstring fragment = iter.GetWord(); | |
54 words.push_back(fragment); | |
55 | |
56 size_t last_words_size = last_words_.size(); | |
57 bool word_mismatch = | |
58 (count < last_words_size && last_words_.at(count) != fragment) || | |
59 (last_words_size > 0 && count >= last_words_size); | |
60 if (!found_chomp_point && word_mismatch) { | |
61 // Need to wait until the next word point so that we skip any spaces or | |
62 // punctuation at the start of the string. | |
63 record_next_point = true; | |
64 } | |
65 ++count; | |
66 } | |
67 if (!found_chomp_point && record_next_point) { | |
68 chomp_point = iter.prev(); | |
69 found_chomp_point = true; | |
70 } | |
71 } | |
72 last_words_ = words; | |
73 chomped_title->assign(title.substr(chomp_point)); | |
74 } | |
75 | |
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