1 // Copyright (c) 2012 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 "chrome/browser/autocomplete/history_provider.h"
6
7 #include <string>
8
9 #include "base/strings/string_util.h"
10 #include "base/strings/utf_string_conversions.h"
11 #include "chrome/browser/autocomplete/autocomplete_input.h"
12 #include "chrome/browser/autocomplete/autocomplete_match.h"
13 #include "chrome/browser/autocomplete/autocomplete_provider_listener.h"
14 #include "chrome/browser/history/history_service.h"
15 #include "chrome/browser/history/history_service_factory.h"
16 #include "chrome/browser/history/in_memory_url_index_types.h"
17 #include "chrome/browser/profiles/profile.h"
18 #include "chrome/common/url_constants.h"
19 #include "url/url_util.h"
20
DeleteMatch(const AutocompleteMatch & match)21 void HistoryProvider::DeleteMatch(const AutocompleteMatch& match) {
22 DCHECK(done_);
23 DCHECK(profile_);
24 DCHECK(match.deletable);
25
26 HistoryService* const history_service =
27 HistoryServiceFactory::GetForProfile(profile_, Profile::EXPLICIT_ACCESS);
28
29 // Delete the underlying URL along with all its visits from the history DB.
30 // The resulting HISTORY_URLS_DELETED notification will also cause all caches
31 // and indices to drop any data they might have stored pertaining to the URL.
32 DCHECK(history_service);
33 DCHECK(match.destination_url.is_valid());
34 history_service->DeleteURL(match.destination_url);
35
36 DeleteMatchFromMatches(match);
37 }
38
39 // static
PreventInlineAutocomplete(const AutocompleteInput & input)40 bool HistoryProvider::PreventInlineAutocomplete(
41 const AutocompleteInput& input) {
42 return input.prevent_inline_autocomplete() ||
43 (!input.text().empty() &&
44 IsWhitespace(input.text()[input.text().length() - 1]));
45 }
46
HistoryProvider(AutocompleteProviderListener * listener,Profile * profile,AutocompleteProvider::Type type)47 HistoryProvider::HistoryProvider(AutocompleteProviderListener* listener,
48 Profile* profile,
49 AutocompleteProvider::Type type)
50 : AutocompleteProvider(listener, profile, type) {
51 }
52
~HistoryProvider()53 HistoryProvider::~HistoryProvider() {}
54
DeleteMatchFromMatches(const AutocompleteMatch & match)55 void HistoryProvider::DeleteMatchFromMatches(const AutocompleteMatch& match) {
56 bool found = false;
57 for (ACMatches::iterator i(matches_.begin()); i != matches_.end(); ++i) {
58 if (i->destination_url == match.destination_url && i->type == match.type) {
59 found = true;
60 if (i->is_history_what_you_typed_match || i->starred) {
61 // We can't get rid of What-You-Typed or Bookmarked matches,
62 // but we can make them look like they have no backing data.
63 i->deletable = false;
64 i->description.clear();
65 i->description_class.clear();
66 } else {
67 matches_.erase(i);
68 }
69 break;
70 }
71 }
72 DCHECK(found) << "Asked to delete a URL that isn't in our set of matches";
73 }
74
75 // static
SpansFromTermMatch(const history::TermMatches & matches,size_t text_length,bool is_url)76 ACMatchClassifications HistoryProvider::SpansFromTermMatch(
77 const history::TermMatches& matches,
78 size_t text_length,
79 bool is_url) {
80 ACMatchClassification::Style url_style =
81 is_url ? ACMatchClassification::URL : ACMatchClassification::NONE;
82 ACMatchClassifications spans;
83 if (matches.empty()) {
84 if (text_length)
85 spans.push_back(ACMatchClassification(0, url_style));
86 return spans;
87 }
88 if (matches[0].offset)
89 spans.push_back(ACMatchClassification(0, url_style));
90 size_t match_count = matches.size();
91 for (size_t i = 0; i < match_count;) {
92 size_t offset = matches[i].offset;
93 spans.push_back(ACMatchClassification(offset,
94 ACMatchClassification::MATCH | url_style));
95 // Skip all adjacent matches.
96 do {
97 offset += matches[i].length;
98 ++i;
99 } while ((i < match_count) && (offset == matches[i].offset));
100 if (offset < text_length)
101 spans.push_back(ACMatchClassification(offset, url_style));
102 }
103
104 return spans;
105 }
106