history_provider.cc revision 5d1f7b1de12d16ceb2c938c56701a3e8bfa558f7 
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
21HistoryProvider::HistoryProvider(AutocompleteProviderListener* listener,
22                                 Profile* profile,
23                                 AutocompleteProvider::Type type)
24    : AutocompleteProvider(listener, profile, type) {
25}
26
27void HistoryProvider::DeleteMatch(const AutocompleteMatch& match) {
28  DCHECK(done_);
29  DCHECK(profile_);
30  DCHECK(match.deletable);
31
32  HistoryService* const history_service =
33      HistoryServiceFactory::GetForProfile(profile_, Profile::EXPLICIT_ACCESS);
34
35  // Delete the match from the history DB.
36  DCHECK(history_service);
37  DCHECK(match.destination_url.is_valid());
38  history_service->DeleteURL(match.destination_url);
39  DeleteMatchFromMatches(match);
40}
41
42HistoryProvider::~HistoryProvider() {}
43
44void HistoryProvider::DeleteMatchFromMatches(const AutocompleteMatch& match) {
45  bool found = false;
46  for (ACMatches::iterator i(matches_.begin()); i != matches_.end(); ++i) {
47    if (i->destination_url == match.destination_url && i->type == match.type) {
48      found = true;
49      if (i->is_history_what_you_typed_match || i->starred) {
50        // We can't get rid of What-You-Typed or Bookmarked matches,
51        // but we can make them look like they have no backing data.
52        i->deletable = false;
53        i->description.clear();
54        i->description_class.clear();
55      } else {
56        matches_.erase(i);
57      }
58      break;
59    }
60  }
61  DCHECK(found) << "Asked to delete a URL that isn't in our set of matches";
62  listener_->OnProviderUpdate(true);
63}
64
65// static
66bool HistoryProvider::PreventInlineAutocomplete(
67    const AutocompleteInput& input) {
68  return input.prevent_inline_autocomplete() ||
69      (!input.text().empty() &&
70       IsWhitespace(input.text()[input.text().length() - 1]));
71}
72
73// static
74ACMatchClassifications HistoryProvider::SpansFromTermMatch(
75    const history::TermMatches& matches,
76    size_t text_length,
77    bool is_url) {
78  ACMatchClassification::Style url_style =
79      is_url ? ACMatchClassification::URL : ACMatchClassification::NONE;
80  ACMatchClassifications spans;
81  if (matches.empty()) {
82    if (text_length)
83      spans.push_back(ACMatchClassification(0, url_style));
84    return spans;
85  }
86  if (matches[0].offset)
87    spans.push_back(ACMatchClassification(0, url_style));
88  size_t match_count = matches.size();
89  for (size_t i = 0; i < match_count;) {
90    size_t offset = matches[i].offset;
91    spans.push_back(ACMatchClassification(offset,
92        ACMatchClassification::MATCH | url_style));
93    // Skip all adjacent matches.
94    do {
95      offset += matches[i].length;
96      ++i;
97    } while ((i < match_count) && (offset == matches[i].offset));
98    if (offset < text_length)
99      spans.push_back(ACMatchClassification(offset, url_style));
100  }
101
102  return spans;
103}
104