chrome/browser/autocomplete/history_provider.cc

   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/bookmarks/bookmark_model_factory.h"
  12 #include "chrome/browser/history/history_service.h"
  13 #include "chrome/browser/history/history_service_factory.h"
  14 #include "chrome/browser/history/in_memory_url_index_types.h"
  15 #include "chrome/browser/profiles/profile.h"
  16 #include "chrome/common/url_constants.h"
  17 #include "components/bookmarks/browser/bookmark_model.h"
  18 #include "components/omnibox/autocomplete_input.h"
  19 #include "components/omnibox/autocomplete_match.h"
  20 #include "url/url_util.h"
  21
  22 void HistoryProvider::DeleteMatch(const AutocompleteMatch& match) {
  23   DCHECK(done_);
  24   DCHECK(profile_);
  25   DCHECK(match.deletable);
  26
  27   HistoryService* const history_service =
  28       HistoryServiceFactory::GetForProfile(profile_, Profile::EXPLICIT_ACCESS);
  29
  30   // Delete the underlying URL along with all its visits from the history DB.
  31   // The resulting HISTORY_URLS_DELETED notification will also cause all caches
  32   // and indices to drop any data they might have stored pertaining to the URL.
  33   DCHECK(history_service);
  34   DCHECK(match.destination_url.is_valid());
  35   history_service->DeleteURL(match.destination_url);
  36
  37   DeleteMatchFromMatches(match);
  38 }
  39
  40 // static
  41 bool HistoryProvider::PreventInlineAutocomplete(
  42     const AutocompleteInput& input) {
  43   return input.prevent_inline_autocomplete() ||
  44       (!input.text().empty() &&
  45        IsWhitespace(input.text()[input.text().length() - 1]));
  46 }
  47
  48 HistoryProvider::HistoryProvider(Profile* profile,
  49                                  AutocompleteProvider::Type type)
  50     : AutocompleteProvider(type),
  51       profile_(profile) {
  52 }
  53
  54 HistoryProvider::~HistoryProvider() {}
  55
  56 void HistoryProvider::DeleteMatchFromMatches(const AutocompleteMatch& match) {
  57   bool found = false;
  58   BookmarkModel* bookmark_model = BookmarkModelFactory::GetForProfile(profile_);
  59   for (ACMatches::iterator i(matches_.begin()); i != matches_.end(); ++i) {
  60     if (i->destination_url == match.destination_url && i->type == match.type) {
  61       found = true;
  62       if (i->is_history_what_you_typed_match ||
  63           (bookmark_model &&
  64            bookmark_model->IsBookmarked(i->destination_url))) {
  65         // We can't get rid of What-You-Typed or Bookmarked matches,
  66         // but we can make them look like they have no backing data.
  67         i->deletable = false;
  68         i->description.clear();
  69         i->description_class.clear();
  70       } else {
  71         matches_.erase(i);
  72       }
  73       break;
  74     }
  75   }
  76   DCHECK(found) << "Asked to delete a URL that isn't in our set of matches";
  77 }
  78
  79 // static
  80 ACMatchClassifications HistoryProvider::SpansFromTermMatch(
  81     const history::TermMatches& matches,
  82     size_t text_length,
  83     bool is_url) {
  84   ACMatchClassification::Style url_style =
  85       is_url ? ACMatchClassification::URL : ACMatchClassification::NONE;
  86   ACMatchClassifications spans;
  87   if (matches.empty()) {
  88     if (text_length)
  89       spans.push_back(ACMatchClassification(0, url_style));
  90     return spans;
  91   }
  92   if (matches[0].offset)
  93     spans.push_back(ACMatchClassification(0, url_style));
  94   size_t match_count = matches.size();
  95   for (size_t i = 0; i < match_count;) {
  96     size_t offset = matches[i].offset;
  97     spans.push_back(ACMatchClassification(offset,
  98         ACMatchClassification::MATCH | url_style));
  99     // Skip all adjacent matches.
 100     do {
 101       offset += matches[i].length;
 102       ++i;
 103     } while ((i < match_count) && (offset == matches[i].offset));
 104     if (offset < text_length)
 105       spans.push_back(ACMatchClassification(offset, url_style));
 106   }
 107
 108   return spans;
 109 }