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// Copyright (c) 2010 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/autocomplete/history_quick_provider.h"
#include "base/basictypes.h"
#include "base/i18n/break_iterator.h"
#include "base/string_util.h"
#include "base/logging.h"
#include "base/utf_string_conversions.h"
#include "chrome/browser/autocomplete/autocomplete_match.h"
#include "chrome/browser/history/history.h"
#include "chrome/browser/prefs/pref_service.h"
#include "chrome/browser/profiles/profile.h"
#include "chrome/browser/history/in_memory_url_index.h"
#include "chrome/browser/net/url_fixer_upper.h"
#include "chrome/browser/plugin_service.h"
#include "chrome/common/notification_source.h"
#include "chrome/common/notification_type.h"
#include "chrome/common/pref_names.h"
#include "chrome/common/url_constants.h"
#include "googleurl/src/url_util.h"
#include "net/base/escape.h"
#include "net/base/net_util.h"
using history::InMemoryURLIndex;
using history::ScoredHistoryMatch;
using history::ScoredHistoryMatches;
HistoryQuickProvider::HistoryQuickProvider(ACProviderListener* listener,
Profile* profile)
: HistoryProvider(listener, profile, "HistoryQuickProvider"),
trim_http_(false),
languages_(profile_->GetPrefs()->GetString(prefs::kAcceptLanguages)) {}
HistoryQuickProvider::~HistoryQuickProvider() {}
void HistoryQuickProvider::Start(const AutocompleteInput& input,
bool minimal_changes) {
matches_.clear();
if ((input.type() == AutocompleteInput::INVALID) ||
(input.type() == AutocompleteInput::FORCED_QUERY))
return;
autocomplete_input_ = input;
trim_http_ = !HasHTTPScheme(input.text());
// Do some fixup on the user input before matching against it, so we provide
// good results for local file paths, input with spaces, etc.
// NOTE: This purposefully doesn't take input.desired_tld() into account; if
// it did, then holding "ctrl" would change all the results from the
// HistoryQuickProvider provider, not just the What You Typed Result.
const std::wstring fixed_text(FixupUserInput(input));
if (fixed_text.empty()) {
// Conceivably fixup could result in an empty string (although I don't
// have cases where this happens offhand). We can't do anything with
// empty input, so just bail; otherwise we'd crash later.
return;
}
autocomplete_input_.set_text(fixed_text);
// TODO(pkasting): We should just block here until this loads. Any time
// someone unloads the history backend, we'll get inconsistent inline
// autocomplete behavior here.
if (GetIndex()) {
DoAutocomplete();
UpdateStarredStateOfMatches();
}
}
// HistoryQuickProvider matches are currently not deletable.
// TODO(mrossetti): Determine when a match should be deletable.
void HistoryQuickProvider::DeleteMatch(const AutocompleteMatch& match) {}
void HistoryQuickProvider::DoAutocomplete() {
// Get the matching URLs from the DB.
string16 term_string(WideToUTF16(autocomplete_input_.text()));
term_string = UnescapeURLComponent(term_string,
UnescapeRule::SPACES | UnescapeRule::URL_SPECIAL_CHARS);
history::InMemoryURLIndex::String16Vector terms(
HistoryQuickProvider::WordVectorFromString16(term_string));
ScoredHistoryMatches matches = GetIndex()->HistoryItemsForTerms(terms);
size_t match_num = matches.size() - 1;
for (ScoredHistoryMatches::const_iterator match_iter = matches.begin();
match_iter != matches.end(); ++match_iter, --match_num) {
const ScoredHistoryMatch& history_match(*match_iter);
AutocompleteMatch ac_match =
QuickMatchToACMatch(history_match, NORMAL, match_num);
matches_.push_back(ac_match);
}
}
AutocompleteMatch HistoryQuickProvider::QuickMatchToACMatch(
const ScoredHistoryMatch& history_match,
MatchType match_type,
size_t match_number) {
const history::URLRow& info = history_match.url_info;
int score = CalculateRelevance(history_match.raw_score,
autocomplete_input_.type(),
match_type, match_number);
AutocompleteMatch match(this, score, !!info.visit_count(),
AutocompleteMatch::HISTORY_URL);
match.destination_url = info.url();
DCHECK(match.destination_url.is_valid());
size_t inline_autocomplete_offset =
history_match.input_location + autocomplete_input_.text().length();
const net::FormatUrlTypes format_types = net::kFormatUrlOmitAll &
~((trim_http_ && !history_match.match_in_scheme) ?
0 : net::kFormatUrlOmitHTTP);
std::string languages =
match_type == WHAT_YOU_TYPED ? std::string() : languages_;
match.fill_into_edit =
AutocompleteInput::FormattedStringWithEquivalentMeaning(info.url(),
UTF16ToWide(net::FormatUrl(info.url(), languages, format_types,
UnescapeRule::SPACES, NULL, NULL,
&inline_autocomplete_offset)));
if (!autocomplete_input_.prevent_inline_autocomplete())
match.inline_autocomplete_offset = inline_autocomplete_offset;
DCHECK((match.inline_autocomplete_offset == std::wstring::npos) ||
(match.inline_autocomplete_offset <= match.fill_into_edit.length()));
size_t match_start = history_match.input_location;
match.contents =
UTF16ToWide(net::FormatUrl(info.url(), languages, format_types,
UnescapeRule::SPACES, NULL, NULL,
&match_start));
if ((match_start != std::wstring::npos) &&
(inline_autocomplete_offset != std::wstring::npos) &&
(inline_autocomplete_offset != match_start)) {
DCHECK(inline_autocomplete_offset > match_start);
AutocompleteMatch::ClassifyLocationInString(match_start,
inline_autocomplete_offset - match_start, match.contents.length(),
ACMatchClassification::URL, &match.contents_class);
} else {
AutocompleteMatch::ClassifyLocationInString(std::wstring::npos, 0,
match.contents.length(), ACMatchClassification::URL,
&match.contents_class);
}
match.description = UTF16ToWide(info.title());
AutocompleteMatch::ClassifyMatchInString(autocomplete_input_.text(),
UTF16ToWide(info.title()),
ACMatchClassification::NONE,
&match.description_class);
return match;
}
history::InMemoryURLIndex* HistoryQuickProvider::GetIndex() {
if (index_for_testing_.get())
return index_for_testing_.get();
HistoryService* const history_service =
profile_->GetHistoryService(Profile::EXPLICIT_ACCESS);
if (!history_service)
return NULL;
return history_service->InMemoryIndex();
}
void HistoryQuickProvider::SetIndexForTesting(
history::InMemoryURLIndex* index) {
DCHECK(index);
index_for_testing_.reset(index);
}
// Utility Functions
history::InMemoryURLIndex::String16Vector
HistoryQuickProvider::WordVectorFromString16(const string16& uni_string) {
history::InMemoryURLIndex::String16Vector words;
base::BreakIterator iter(&uni_string, base::BreakIterator::BREAK_WORD);
if (iter.Init()) {
while (iter.Advance()) {
if (iter.IsWord())
words.push_back(iter.GetString());
}
}
return words;
}
// static
int HistoryQuickProvider::CalculateRelevance(int raw_score,
AutocompleteInput::Type input_type,
MatchType match_type,
size_t match_number) {
switch (match_type) {
case INLINE_AUTOCOMPLETE:
return 1400;
case WHAT_YOU_TYPED:
return 1200;
default:
return 900 + static_cast<int>(match_number);
}
}
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