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// Copyright (c) 2011 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/browser/history/shortcuts_backend.h"
#include <map>
#include <string>
#include <vector>
#include "base/i18n/case_conversion.h"
#include "base/string_util.h"
#include "base/task.h"
#include "chrome/browser/autocomplete/autocomplete.h"
#include "chrome/browser/autocomplete/autocomplete_match.h"
#include "chrome/browser/history/history.h"
#include "chrome/browser/history/history_notifications.h"
#include "chrome/browser/history/shortcuts_database.h"
#include "chrome/browser/profiles/profile.h"
#include "chrome/common/chrome_notification_types.h"
#include "chrome/common/guid.h"
#include "content/browser/browser_thread.h"
#include "content/common/notification_details.h"
#include "content/common/notification_source.h"
namespace history {
ShortcutsBackend::ShortcutsBackend(const FilePath& db_folder_path,
Profile *profile)
: current_state_(NOT_INITIALIZED),
observer_list_(new ObserverListThreadSafe<ShortcutsBackendObserver>()),
db_(db_folder_path) {
// |profile| can be NULL in tests.
if (profile) {
notification_registrar_.Add(this, chrome::NOTIFICATION_OMNIBOX_OPENED_URL,
Source<Profile>(profile));
notification_registrar_.Add(this, chrome::NOTIFICATION_HISTORY_URLS_DELETED,
Source<Profile>(profile));
}
}
ShortcutsBackend::~ShortcutsBackend() {}
bool ShortcutsBackend::Init() {
if (base::subtle::NoBarrier_CompareAndSwap(¤t_state_,
NOT_INITIALIZED,
INITIALIZING) == NOT_INITIALIZED) {
return BrowserThread::PostTask(BrowserThread::DB, FROM_HERE,
NewRunnableMethod(this, &ShortcutsBackend::InitInternal));
} else {
return false;
}
}
bool ShortcutsBackend::AddShortcut(shortcuts_provider::Shortcut shortcut) {
// It is safe to add a shortcut while the backend is being initialized since
// the addition will occur on the same thread as the initialization.
DCHECK(current_state_ != NOT_INITIALIZED);
return BrowserThread::PostTask(BrowserThread::DB, FROM_HERE,
NewRunnableMethod(this, &ShortcutsBackend::AddOrUpdateShortcutInternal,
shortcut, true));
}
bool ShortcutsBackend::UpdateShortcut(shortcuts_provider::Shortcut shortcut) {
DCHECK(initialized());
return BrowserThread::PostTask(BrowserThread::DB, FROM_HERE,
NewRunnableMethod(this, &ShortcutsBackend::AddOrUpdateShortcutInternal,
shortcut, false));
}
bool ShortcutsBackend::DeleteShortcutsWithIds(
const std::vector<std::string>& shortcut_ids) {
DCHECK(initialized());
return BrowserThread::PostTask(BrowserThread::DB, FROM_HERE,
NewRunnableMethod(this, &ShortcutsBackend::DeleteShortcutsWithIdsInternal,
shortcut_ids));
}
bool ShortcutsBackend::DeleteShortcutsWithUrl(const GURL& shortcut_url) {
DCHECK(initialized());
return BrowserThread::PostTask(BrowserThread::DB, FROM_HERE,
NewRunnableMethod(this, &ShortcutsBackend::DeleteShortcutsWithUrlInternal,
shortcut_url.spec()));
}
bool ShortcutsBackend::GetShortcuts(
shortcuts_provider::ShortcutMap* shortcuts) {
DCHECK(initialized());
DCHECK(shortcuts);
if (!initialized())
return false;
shortcuts->clear();
base::AutoLock lock(data_access_lock_);
shortcuts->insert(shortcuts_map_.begin(), shortcuts_map_.end());
return true;
}
void ShortcutsBackend::InitInternal() {
db_.Init();
shortcuts_provider::GuidToShortcutMap shortcuts;
db_.LoadShortcuts(&shortcuts);
for (shortcuts_provider::GuidToShortcutMap::iterator it = shortcuts.begin();
it != shortcuts.end(); ++it) {
guid_map_[it->first] = shortcuts_map_.insert(
std::make_pair(base::i18n::ToLower(it->second.text), it->second));
}
base::subtle::NoBarrier_CompareAndSwap(¤t_state_, INITIALIZING,
INITIALIZED);
observer_list_->Notify(&ShortcutsBackendObserver::OnShortcutsLoaded);
}
void ShortcutsBackend::AddOrUpdateShortcutInternal(
shortcuts_provider::Shortcut shortcut, bool add) {
{
// Update local copy.
base::AutoLock lock(data_access_lock_);
shortcuts_provider::GuidToShortcutsIteratorMap::iterator it =
guid_map_.find(shortcut.id);
if (it != guid_map_.end())
shortcuts_map_.erase(it->second);
guid_map_[shortcut.id] = shortcuts_map_.insert(
std::make_pair(base::i18n::ToLower(shortcut.text), shortcut));
}
if (add)
db_.AddShortcut(shortcut);
else
db_.UpdateShortcut(shortcut);
observer_list_->Notify(&ShortcutsBackendObserver::OnShortcutAddedOrUpdated,
shortcut);
}
void ShortcutsBackend::DeleteShortcutsWithIdsInternal(
std::vector<std::string> shortcut_ids) {
{
// Update local copy.
base::AutoLock lock(data_access_lock_);
for (size_t i = 0; i < shortcut_ids.size(); ++i) {
shortcuts_provider::GuidToShortcutsIteratorMap::iterator it =
guid_map_.find(shortcut_ids[i]);
if (it != guid_map_.end()) {
shortcuts_map_.erase(it->second);
guid_map_.erase(it);
}
}
}
db_.DeleteShortcutsWithIds(shortcut_ids);
observer_list_->Notify(&ShortcutsBackendObserver::OnShortcutsRemoved,
shortcut_ids);
}
void ShortcutsBackend::DeleteShortcutsWithUrlInternal(
std::string shortcut_url) {
std::vector<std::string> shortcut_ids;
{
// Update local copy.
base::AutoLock lock(data_access_lock_);
for (shortcuts_provider::GuidToShortcutsIteratorMap::iterator
it = guid_map_.begin();
it != guid_map_.end();) {
if (it->second->second.url.spec() == shortcut_url) {
shortcut_ids.push_back(it->first);
shortcuts_map_.erase(it->second);
guid_map_.erase(it++);
} else {
++it;
}
}
}
db_.DeleteShortcutsWithUrl(shortcut_url);
observer_list_->Notify(&ShortcutsBackendObserver::OnShortcutsRemoved,
shortcut_ids);
}
// NotificationObserver:
void ShortcutsBackend::Observe(int type,
const NotificationSource& source,
const NotificationDetails& details) {
if (type == chrome::NOTIFICATION_HISTORY_URLS_DELETED) {
const std::set<GURL>& urls =
Details<const history::URLsDeletedDetails>(details)->urls;
std::vector<std::string> shortcut_ids;
base::AutoLock lock(data_access_lock_);
for (shortcuts_provider::GuidToShortcutsIteratorMap::iterator
it = guid_map_.begin();
it != guid_map_.end(); ++it) {
if (urls.find(it->second->second.url) != urls.end())
shortcut_ids.push_back(it->first);
}
DeleteShortcutsWithIds(shortcut_ids);
return;
}
DCHECK(type == chrome::NOTIFICATION_OMNIBOX_OPENED_URL);
AutocompleteLog* log = Details<AutocompleteLog>(details).ptr();
string16 text_lowercase(base::i18n::ToLower(log->text));
int number_of_hits = 1;
std::string id;
const AutocompleteMatch& match(log->result.match_at(log->selected_index));
base::AutoLock lock(data_access_lock_);
for (shortcuts_provider::ShortcutMap::iterator it =
shortcuts_map_.lower_bound(text_lowercase);
it != shortcuts_map_.end() &&
StartsWith(it->first, text_lowercase, true); ++it) {
if (match.destination_url == it->second.url) {
number_of_hits = it->second.number_of_hits + 1;
id = it->second.id;
// guid_map_ will be updated further down on re-insertion.
shortcuts_map_.erase(it);
break;
}
}
shortcuts_provider::Shortcut shortcut(log->text, match.destination_url,
match.contents, match.contents_class, match.description,
match.description_class);
shortcut.number_of_hits = number_of_hits;
if (number_of_hits == 1)
shortcut.id = guid::GenerateGUID();
else
shortcut.id = id;
guid_map_[shortcut.id] = shortcuts_map_.insert(
std::make_pair(text_lowercase, shortcut));
if (number_of_hits == 1)
AddShortcut(shortcut);
else
UpdateShortcut(shortcut);
}
} // namespace history
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