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// Copyright (c) 2012 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 "components/omnibox/browser/autocomplete_controller.h"
#include <set>
#include <string>
#include "base/format_macros.h"
#include "base/logging.h"
#include "base/metrics/histogram.h"
#include "base/strings/string_number_conversions.h"
#include "base/strings/stringprintf.h"
#include "base/time/time.h"
#include "components/omnibox/browser/autocomplete_controller_delegate.h"
#include "components/omnibox/browser/bookmark_provider.h"
#include "components/omnibox/browser/builtin_provider.h"
#include "components/omnibox/browser/history_quick_provider.h"
#include "components/omnibox/browser/history_url_provider.h"
#include "components/omnibox/browser/keyword_provider.h"
#include "components/omnibox/browser/omnibox_field_trial.h"
#include "components/omnibox/browser/search_provider.h"
#include "components/omnibox/browser/shortcuts_provider.h"
#include "components/omnibox/browser/zero_suggest_provider.h"
#include "components/search_engines/template_url.h"
#include "components/search_engines/template_url_service.h"
#include "grit/components_strings.h"
#include "ui/base/l10n/l10n_util.h"
namespace {
// Converts the given match to a type (and possibly subtype) based on the AQS
// specification. For more details, see
// http://goto.google.com/binary-clients-logging.
void AutocompleteMatchToAssistedQuery(
const AutocompleteMatch::Type& match,
const AutocompleteProvider* provider,
size_t* type,
size_t* subtype) {
// This type indicates a native chrome suggestion.
*type = 69;
// Default value, indicating no subtype.
*subtype = base::string16::npos;
// If provider is TYPE_ZERO_SUGGEST, set the subtype accordingly.
// Type will be set in the switch statement below where we'll enter one of
// SEARCH_SUGGEST or NAVSUGGEST. This subtype indicates context-aware zero
// suggest.
if (provider &&
(provider->type() == AutocompleteProvider::TYPE_ZERO_SUGGEST) &&
(match != AutocompleteMatchType::SEARCH_SUGGEST_PERSONALIZED)) {
DCHECK((match == AutocompleteMatchType::SEARCH_SUGGEST) ||
(match == AutocompleteMatchType::NAVSUGGEST));
*subtype = 66;
}
switch (match) {
case AutocompleteMatchType::SEARCH_SUGGEST: {
// Do not set subtype here; subtype may have been set above.
*type = 0;
return;
}
case AutocompleteMatchType::SEARCH_SUGGEST_ENTITY: {
*subtype = 46;
return;
}
case AutocompleteMatchType::SEARCH_SUGGEST_TAIL: {
*subtype = 33;
return;
}
case AutocompleteMatchType::SEARCH_SUGGEST_PERSONALIZED: {
*subtype = 39;
return;
}
case AutocompleteMatchType::SEARCH_SUGGEST_PROFILE: {
*subtype = 44;
return;
}
case AutocompleteMatchType::NAVSUGGEST: {
// Do not set subtype here; subtype may have been set above.
*type = 5;
return;
}
case AutocompleteMatchType::SEARCH_WHAT_YOU_TYPED: {
*subtype = 57;
return;
}
case AutocompleteMatchType::URL_WHAT_YOU_TYPED: {
*subtype = 58;
return;
}
case AutocompleteMatchType::SEARCH_HISTORY: {
*subtype = 59;
return;
}
case AutocompleteMatchType::HISTORY_URL: {
*subtype = 60;
return;
}
case AutocompleteMatchType::HISTORY_TITLE: {
*subtype = 61;
return;
}
case AutocompleteMatchType::HISTORY_BODY: {
*subtype = 62;
return;
}
case AutocompleteMatchType::HISTORY_KEYWORD: {
*subtype = 63;
return;
}
case AutocompleteMatchType::BOOKMARK_TITLE: {
*subtype = 65;
return;
}
case AutocompleteMatchType::NAVSUGGEST_PERSONALIZED: {
*subtype = 39;
return;
}
default: {
// This value indicates a native chrome suggestion with no named subtype
// (yet).
*subtype = 64;
}
}
}
// Appends available autocompletion of the given type, subtype, and number to
// the existing available autocompletions string, encoding according to the
// spec.
void AppendAvailableAutocompletion(size_t type,
size_t subtype,
int count,
std::string* autocompletions) {
if (!autocompletions->empty())
autocompletions->append("j");
base::StringAppendF(autocompletions, "%" PRIuS, type);
// Subtype is optional - base::string16::npos indicates no subtype.
if (subtype != base::string16::npos)
base::StringAppendF(autocompletions, "i%" PRIuS, subtype);
if (count > 1)
base::StringAppendF(autocompletions, "l%d", count);
}
// Returns whether the autocompletion is trivial enough that we consider it
// an autocompletion for which the omnibox autocompletion code did not add
// any value.
bool IsTrivialAutocompletion(const AutocompleteMatch& match) {
return match.type == AutocompleteMatchType::SEARCH_WHAT_YOU_TYPED ||
match.type == AutocompleteMatchType::URL_WHAT_YOU_TYPED ||
match.type == AutocompleteMatchType::SEARCH_OTHER_ENGINE;
}
// Whether this autocomplete match type supports custom descriptions.
bool AutocompleteMatchHasCustomDescription(const AutocompleteMatch& match) {
return match.type == AutocompleteMatchType::SEARCH_SUGGEST_ENTITY ||
match.type == AutocompleteMatchType::SEARCH_SUGGEST_PROFILE;
}
} // namespace
AutocompleteController::AutocompleteController(
scoped_ptr<AutocompleteProviderClient> provider_client,
AutocompleteControllerDelegate* delegate,
int provider_types)
: delegate_(delegate),
provider_client_(provider_client.Pass()),
history_url_provider_(NULL),
keyword_provider_(NULL),
search_provider_(NULL),
zero_suggest_provider_(NULL),
stop_timer_duration_(OmniboxFieldTrial::StopTimerFieldTrialDuration()),
done_(true),
in_start_(false),
template_url_service_(provider_client_->GetTemplateURLService()) {
provider_types &= ~OmniboxFieldTrial::GetDisabledProviderTypes();
if (provider_types & AutocompleteProvider::TYPE_BOOKMARK)
providers_.push_back(new BookmarkProvider(provider_client_.get()));
if (provider_types & AutocompleteProvider::TYPE_BUILTIN)
providers_.push_back(new BuiltinProvider(provider_client_.get()));
if (provider_types & AutocompleteProvider::TYPE_HISTORY_QUICK)
providers_.push_back(new HistoryQuickProvider(provider_client_.get()));
if (provider_types & AutocompleteProvider::TYPE_HISTORY_URL) {
history_url_provider_ =
new HistoryURLProvider(provider_client_.get(), this);
providers_.push_back(history_url_provider_);
}
// "Tab to search" can be used on all platforms other than Android.
#if !defined(OS_ANDROID)
if (provider_types & AutocompleteProvider::TYPE_KEYWORD) {
keyword_provider_ = new KeywordProvider(provider_client_.get(), this);
providers_.push_back(keyword_provider_);
}
#endif
if (provider_types & AutocompleteProvider::TYPE_SEARCH) {
search_provider_ = new SearchProvider(provider_client_.get(), this);
providers_.push_back(search_provider_);
}
if (provider_types & AutocompleteProvider::TYPE_SHORTCUTS)
providers_.push_back(new ShortcutsProvider(provider_client_.get()));
if (provider_types & AutocompleteProvider::TYPE_ZERO_SUGGEST) {
zero_suggest_provider_ =
ZeroSuggestProvider::Create(provider_client_.get(), this);
if (zero_suggest_provider_)
providers_.push_back(zero_suggest_provider_);
}
}
AutocompleteController::~AutocompleteController() {
// The providers may have tasks outstanding that hold refs to them. We need
// to ensure they won't call us back if they outlive us. (Practically,
// calling Stop() should also cancel those tasks and make it so that we hold
// the only refs.) We also don't want to bother notifying anyone of our
// result changes here, because the notification observer is in the midst of
// shutdown too, so we don't ask Stop() to clear |result_| (and notify).
result_.Reset(); // Not really necessary.
Stop(false);
}
void AutocompleteController::Start(const AutocompleteInput& input) {
const base::string16 old_input_text(input_.text());
const bool old_want_asynchronous_matches = input_.want_asynchronous_matches();
const bool old_from_omnibox_focus = input_.from_omnibox_focus();
input_ = input;
// See if we can avoid rerunning autocomplete when the query hasn't changed
// much. When the user presses or releases the ctrl key, the desired_tld
// changes, and when the user finishes an IME composition, inline autocomplete
// may no longer be prevented. In both these cases the text itself hasn't
// changed since the last query, and some providers can do much less work (and
// get matches back more quickly). Taking advantage of this reduces flicker.
//
// NOTE: This comes after constructing |input_| above since that construction
// can change the text string (e.g. by stripping off a leading '?').
const bool minimal_changes =
(input_.text() == old_input_text) &&
(input_.want_asynchronous_matches() == old_want_asynchronous_matches) &&
(input.from_omnibox_focus() == old_from_omnibox_focus);
expire_timer_.Stop();
stop_timer_.Stop();
// Start the new query.
in_start_ = true;
base::TimeTicks start_time = base::TimeTicks::Now();
for (Providers::iterator i(providers_.begin()); i != providers_.end(); ++i) {
// TODO(mpearson): Remove timing code once bug 178705 is resolved.
base::TimeTicks provider_start_time = base::TimeTicks::Now();
(*i)->Start(input_, minimal_changes);
if (!input.want_asynchronous_matches())
DCHECK((*i)->done());
base::TimeTicks provider_end_time = base::TimeTicks::Now();
std::string name = std::string("Omnibox.ProviderTime2.") + (*i)->GetName();
base::HistogramBase* counter = base::Histogram::FactoryGet(
name, 1, 5000, 20, base::Histogram::kUmaTargetedHistogramFlag);
counter->Add(static_cast<int>(
(provider_end_time - provider_start_time).InMilliseconds()));
}
if (input.want_asynchronous_matches() && (input.text().length() < 6)) {
base::TimeTicks end_time = base::TimeTicks::Now();
std::string name =
"Omnibox.QueryTime2." + base::IntToString(input.text().length());
base::HistogramBase* counter = base::Histogram::FactoryGet(
name, 1, 1000, 50, base::Histogram::kUmaTargetedHistogramFlag);
counter->Add(static_cast<int>((end_time - start_time).InMilliseconds()));
}
in_start_ = false;
CheckIfDone();
// The second true forces saying the default match has changed.
// This triggers the edit model to update things such as the inline
// autocomplete state. In particular, if the user has typed a key
// since the last notification, and we're now re-running
// autocomplete, then we need to update the inline autocompletion
// even if the current match is for the same URL as the last run's
// default match. Likewise, the controller doesn't know what's
// happened in the edit since the last time it ran autocomplete.
// The user might have selected all the text and hit delete, then
// typed a new character. The selection and delete won't send any
// signals to the controller so it doesn't realize that anything was
// cleared or changed. Even if the default match hasn't changed, we
// need the edit model to update the display.
UpdateResult(false, true);
if (!done_) {
StartExpireTimer();
StartStopTimer();
}
}
void AutocompleteController::Stop(bool clear_result) {
StopHelper(clear_result, false);
}
void AutocompleteController::DeleteMatch(const AutocompleteMatch& match) {
DCHECK(match.SupportsDeletion());
// Delete duplicate matches attached to the main match first.
for (ACMatches::const_iterator it(match.duplicate_matches.begin());
it != match.duplicate_matches.end(); ++it) {
if (it->deletable)
it->provider->DeleteMatch(*it);
}
if (match.deletable)
match.provider->DeleteMatch(match);
OnProviderUpdate(true);
// If we're not done, we might attempt to redisplay the deleted match. Make
// sure we aren't displaying it by removing any old entries.
ExpireCopiedEntries();
}
void AutocompleteController::ExpireCopiedEntries() {
// The first true makes UpdateResult() clear out the results and
// regenerate them, thus ensuring that no results from the previous
// result set remain.
UpdateResult(true, false);
}
void AutocompleteController::OnProviderUpdate(bool updated_matches) {
CheckIfDone();
// Multiple providers may provide synchronous results, so we only update the
// results if we're not in Start().
if (!in_start_ && (updated_matches || done_))
UpdateResult(false, false);
}
void AutocompleteController::AddProvidersInfo(
ProvidersInfo* provider_info) const {
provider_info->clear();
for (Providers::const_iterator i(providers_.begin()); i != providers_.end();
++i) {
// Add per-provider info, if any.
(*i)->AddProviderInfo(provider_info);
// This is also a good place to put code to add info that you want to
// add for every provider.
}
}
void AutocompleteController::ResetSession() {
for (Providers::const_iterator i(providers_.begin()); i != providers_.end();
++i)
(*i)->ResetSession();
}
void AutocompleteController::UpdateMatchDestinationURLWithQueryFormulationTime(
base::TimeDelta query_formulation_time,
AutocompleteMatch* match) const {
if (!match->search_terms_args.get() ||
match->search_terms_args->assisted_query_stats.empty())
return;
// Append the query formulation time (time from when the user first typed a
// character into the omnibox to when the user selected a query) and whether
// a field trial has triggered to the AQS parameter.
TemplateURLRef::SearchTermsArgs search_terms_args(*match->search_terms_args);
search_terms_args.assisted_query_stats += base::StringPrintf(
".%" PRId64 "j%dj%d",
query_formulation_time.InMilliseconds(),
(search_provider_ &&
search_provider_->field_trial_triggered_in_session()) ||
(zero_suggest_provider_ &&
zero_suggest_provider_->field_trial_triggered_in_session()),
input_.current_page_classification());
UpdateMatchDestinationURL(search_terms_args, match);
}
void AutocompleteController::UpdateMatchDestinationURL(
const TemplateURLRef::SearchTermsArgs& search_terms_args,
AutocompleteMatch* match) const {
TemplateURL* template_url = match->GetTemplateURL(
template_url_service_, false);
if (!template_url)
return;
match->destination_url = GURL(template_url->url_ref().ReplaceSearchTerms(
search_terms_args, template_url_service_->search_terms_data()));
}
void AutocompleteController::UpdateResult(
bool regenerate_result,
bool force_notify_default_match_changed) {
const bool last_default_was_valid = result_.default_match() != result_.end();
// The following three variables are only set and used if
// |last_default_was_valid|.
base::string16 last_default_fill_into_edit, last_default_keyword,
last_default_associated_keyword;
if (last_default_was_valid) {
last_default_fill_into_edit = result_.default_match()->fill_into_edit;
last_default_keyword = result_.default_match()->keyword;
if (result_.default_match()->associated_keyword != NULL)
last_default_associated_keyword =
result_.default_match()->associated_keyword->keyword;
}
if (regenerate_result)
result_.Reset();
AutocompleteResult last_result;
last_result.Swap(&result_);
for (Providers::const_iterator i(providers_.begin());
i != providers_.end(); ++i)
result_.AppendMatches(input_, (*i)->matches());
// Sort the matches and trim to a small number of "best" matches.
result_.SortAndCull(input_, provider_client_->GetAcceptLanguages(),
template_url_service_);
// Need to validate before invoking CopyOldMatches as the old matches are not
// valid against the current input.
#ifndef NDEBUG
result_.Validate();
#endif
if (!done_) {
// This conditional needs to match the conditional in Start that invokes
// StartExpireTimer.
result_.CopyOldMatches(input_, provider_client_->GetAcceptLanguages(),
last_result, template_url_service_);
}
UpdateKeywordDescriptions(&result_);
UpdateAssociatedKeywords(&result_);
UpdateAssistedQueryStats(&result_);
if (search_provider_)
search_provider_->RegisterDisplayedAnswers(result_);
const bool default_is_valid = result_.default_match() != result_.end();
base::string16 default_associated_keyword;
if (default_is_valid &&
(result_.default_match()->associated_keyword != NULL)) {
default_associated_keyword =
result_.default_match()->associated_keyword->keyword;
}
// We've gotten async results. Send notification that the default match
// updated if fill_into_edit, associated_keyword, or keyword differ. (The
// second can change if we've just started Chrome and the keyword database
// finishes loading while processing this request. The third can change
// if we swapped from interpreting the input as a search--which gets
// labeled with the default search provider's keyword--to a URL.)
// We don't check the URL as that may change for the default match
// even though the fill into edit hasn't changed (see SearchProvider
// for one case of this).
const bool notify_default_match =
(last_default_was_valid != default_is_valid) ||
(last_default_was_valid &&
((result_.default_match()->fill_into_edit !=
last_default_fill_into_edit) ||
(default_associated_keyword != last_default_associated_keyword) ||
(result_.default_match()->keyword != last_default_keyword)));
if (notify_default_match)
last_time_default_match_changed_ = base::TimeTicks::Now();
NotifyChanged(force_notify_default_match_changed || notify_default_match);
}
void AutocompleteController::UpdateAssociatedKeywords(
AutocompleteResult* result) {
if (!keyword_provider_)
return;
// Determine if the user's input is an exact keyword match.
base::string16 exact_keyword = keyword_provider_->GetKeywordForText(
TemplateURLService::CleanUserInputKeyword(input_.text()));
std::set<base::string16> keywords;
for (ACMatches::iterator match(result->begin()); match != result->end();
++match) {
base::string16 keyword(
match->GetSubstitutingExplicitlyInvokedKeyword(template_url_service_));
if (!keyword.empty()) {
keywords.insert(keyword);
continue;
}
// When the user has typed an exact keyword, we want tab-to-search on the
// default match to select that keyword, even if the match
// inline-autocompletes to a different keyword. (This prevents inline
// autocompletions from blocking a user's attempts to use an explicitly-set
// keyword of their own creation.) So use |exact_keyword| if it's
// available.
if (!exact_keyword.empty() && !keywords.count(exact_keyword)) {
keywords.insert(exact_keyword);
match->associated_keyword.reset(new AutocompleteMatch(
keyword_provider_->CreateVerbatimMatch(exact_keyword,
exact_keyword, input_)));
continue;
}
// Otherwise, set a match's associated keyword based on the match's
// fill_into_edit, which should take inline autocompletions into account.
keyword = keyword_provider_->GetKeywordForText(match->fill_into_edit);
// Only add the keyword if the match does not have a duplicate keyword with
// a more relevant match.
if (!keyword.empty() && !keywords.count(keyword)) {
keywords.insert(keyword);
match->associated_keyword.reset(new AutocompleteMatch(
keyword_provider_->CreateVerbatimMatch(match->fill_into_edit,
keyword, input_)));
} else {
match->associated_keyword.reset();
}
}
}
void AutocompleteController::UpdateKeywordDescriptions(
AutocompleteResult* result) {
base::string16 last_keyword;
for (AutocompleteResult::iterator i(result->begin()); i != result->end();
++i) {
if (AutocompleteMatch::IsSearchType(i->type)) {
if (AutocompleteMatchHasCustomDescription(*i))
continue;
i->description.clear();
i->description_class.clear();
DCHECK(!i->keyword.empty());
if (i->keyword != last_keyword) {
const TemplateURL* template_url =
i->GetTemplateURL(template_url_service_, false);
if (template_url) {
// For extension keywords, just make the description the extension
// name -- don't assume that the normal search keyword description is
// applicable.
i->description = template_url->AdjustedShortNameForLocaleDirection();
if (template_url->GetType() != TemplateURL::OMNIBOX_API_EXTENSION) {
i->description = l10n_util::GetStringFUTF16(
IDS_AUTOCOMPLETE_SEARCH_DESCRIPTION, i->description);
}
i->description_class.push_back(
ACMatchClassification(0, ACMatchClassification::DIM));
}
last_keyword = i->keyword;
}
} else {
last_keyword.clear();
}
}
}
void AutocompleteController::UpdateAssistedQueryStats(
AutocompleteResult* result) {
if (result->empty())
return;
// Build the impressions string (the AQS part after ".").
std::string autocompletions;
int count = 0;
size_t last_type = base::string16::npos;
size_t last_subtype = base::string16::npos;
for (ACMatches::iterator match(result->begin()); match != result->end();
++match) {
size_t type = base::string16::npos;
size_t subtype = base::string16::npos;
AutocompleteMatchToAssistedQuery(
match->type, match->provider, &type, &subtype);
if (last_type != base::string16::npos &&
(type != last_type || subtype != last_subtype)) {
AppendAvailableAutocompletion(
last_type, last_subtype, count, &autocompletions);
count = 1;
} else {
count++;
}
last_type = type;
last_subtype = subtype;
}
AppendAvailableAutocompletion(
last_type, last_subtype, count, &autocompletions);
// Go over all matches and set AQS if the match supports it.
for (size_t index = 0; index < result->size(); ++index) {
AutocompleteMatch* match = result->match_at(index);
const TemplateURL* template_url =
match->GetTemplateURL(template_url_service_, false);
if (!template_url || !match->search_terms_args.get())
continue;
std::string selected_index;
// Prevent trivial suggestions from getting credit for being selected.
if (!IsTrivialAutocompletion(*match))
selected_index = base::StringPrintf("%" PRIuS, index);
match->search_terms_args->assisted_query_stats =
base::StringPrintf("chrome.%s.%s",
selected_index.c_str(),
autocompletions.c_str());
match->destination_url = GURL(template_url->url_ref().ReplaceSearchTerms(
*match->search_terms_args, template_url_service_->search_terms_data()));
}
}
void AutocompleteController::NotifyChanged(bool notify_default_match) {
if (delegate_)
delegate_->OnResultChanged(notify_default_match);
if (done_)
provider_client_->OnAutocompleteControllerResultReady(this);
}
void AutocompleteController::CheckIfDone() {
for (Providers::const_iterator i(providers_.begin()); i != providers_.end();
++i) {
if (!(*i)->done()) {
done_ = false;
return;
}
}
done_ = true;
}
void AutocompleteController::StartExpireTimer() {
// Amount of time (in ms) between when the user stops typing and
// when we remove any copied entries. We do this from the time the
// user stopped typing as some providers (such as SearchProvider)
// wait for the user to stop typing before they initiate a query.
const int kExpireTimeMS = 500;
if (result_.HasCopiedMatches())
expire_timer_.Start(FROM_HERE,
base::TimeDelta::FromMilliseconds(kExpireTimeMS),
this, &AutocompleteController::ExpireCopiedEntries);
}
void AutocompleteController::StartStopTimer() {
stop_timer_.Start(FROM_HERE,
stop_timer_duration_,
base::Bind(&AutocompleteController::StopHelper,
base::Unretained(this),
false, true));
}
void AutocompleteController::StopHelper(bool clear_result,
bool due_to_user_inactivity) {
for (Providers::const_iterator i(providers_.begin()); i != providers_.end();
++i) {
(*i)->Stop(clear_result, due_to_user_inactivity);
}
expire_timer_.Stop();
stop_timer_.Stop();
done_ = true;
if (clear_result && !result_.empty()) {
result_.Reset();
// NOTE: We pass in false since we're trying to only clear the popup, not
// touch the edit... this is all a mess and should be cleaned up :(
NotifyChanged(false);
}
}
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