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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 "chrome/browser/autocomplete/builtin_provider.h"
#include <algorithm>
#include "base/strings/string_util.h"
#include "base/strings/utf_string_conversions.h"
#include "chrome/browser/autocomplete/history_provider.h"
#include "chrome/common/url_constants.h"
#include "components/metrics/proto/omnibox_input_type.pb.h"
#include "components/omnibox/autocomplete_input.h"
#include "components/url_fixer/url_fixer.h"
namespace {
#if !defined(OS_ANDROID)
// This list should be kept in sync with chrome/common/url_constants.h.
// Only include useful sub-pages, confirmation alerts are not useful.
const char* const kChromeSettingsSubPages[] = {
chrome::kAutofillSubPage,
chrome::kClearBrowserDataSubPage,
chrome::kContentSettingsSubPage,
chrome::kContentSettingsExceptionsSubPage,
chrome::kImportDataSubPage,
chrome::kLanguageOptionsSubPage,
chrome::kPasswordManagerSubPage,
chrome::kResetProfileSettingsSubPage,
chrome::kSearchEnginesSubPage,
chrome::kSyncSetupSubPage,
#if defined(OS_CHROMEOS)
chrome::kInternetOptionsSubPage,
#endif
};
#endif // !defined(OS_ANDROID)
} // namespace
const int BuiltinProvider::kRelevance = 860;
BuiltinProvider::BuiltinProvider()
: AutocompleteProvider(AutocompleteProvider::TYPE_BUILTIN) {
std::vector<std::string> builtins(
chrome::kChromeHostURLs,
chrome::kChromeHostURLs + chrome::kNumberOfChromeHostURLs);
std::sort(builtins.begin(), builtins.end());
for (std::vector<std::string>::iterator i(builtins.begin());
i != builtins.end(); ++i)
builtins_.push_back(base::ASCIIToUTF16(*i));
#if !defined(OS_ANDROID)
base::string16 settings(base::ASCIIToUTF16(chrome::kChromeUISettingsHost) +
base::ASCIIToUTF16("/"));
for (size_t i = 0; i < arraysize(kChromeSettingsSubPages); i++) {
builtins_.push_back(
settings + base::ASCIIToUTF16(kChromeSettingsSubPages[i]));
}
#endif
}
void BuiltinProvider::Start(const AutocompleteInput& input,
bool minimal_changes,
bool called_due_to_focus) {
matches_.clear();
if (called_due_to_focus ||
(input.type() == metrics::OmniboxInputType::INVALID) ||
(input.type() == metrics::OmniboxInputType::FORCED_QUERY) ||
(input.type() == metrics::OmniboxInputType::QUERY))
return;
const size_t kAboutSchemeLength = strlen(url::kAboutScheme);
const base::string16 kAbout =
base::ASCIIToUTF16(url::kAboutScheme) +
base::ASCIIToUTF16(url::kStandardSchemeSeparator);
const base::string16 kChrome = base::ASCIIToUTF16(content::kChromeUIScheme) +
base::ASCIIToUTF16(url::kStandardSchemeSeparator);
const int kUrl = ACMatchClassification::URL;
const int kMatch = kUrl | ACMatchClassification::MATCH;
base::string16 text = input.text();
bool starting_chrome = base::StartsWith(kChrome, text, false);
if (starting_chrome || base::StartsWith(kAbout, text, false)) {
ACMatchClassifications styles;
// Highlight the input portion matching "chrome://"; or if the user has
// input "about:" (with optional slashes), highlight the whole "chrome://".
bool highlight = starting_chrome || text.length() > kAboutSchemeLength;
styles.push_back(ACMatchClassification(0, highlight ? kMatch : kUrl));
size_t offset = starting_chrome ? text.length() : kChrome.length();
if (highlight)
styles.push_back(ACMatchClassification(offset, kUrl));
// Include some common builtin chrome URLs as the user types the scheme.
AddMatch(base::ASCIIToUTF16(chrome::kChromeUIChromeURLsURL),
base::string16(), styles);
#if !defined(OS_ANDROID)
AddMatch(base::ASCIIToUTF16(chrome::kChromeUISettingsURL),
base::string16(), styles);
#endif
AddMatch(base::ASCIIToUTF16(chrome::kChromeUIVersionURL),
base::string16(), styles);
} else {
// Match input about: or chrome: URL input against builtin chrome URLs.
GURL url = url_fixer::FixupURL(base::UTF16ToUTF8(text), std::string());
// BuiltinProvider doesn't know how to suggest valid ?query or #fragment
// extensions to chrome: URLs.
if (url.SchemeIs(content::kChromeUIScheme) && url.has_host() &&
!url.has_query() && !url.has_ref()) {
// Suggest about:blank for substrings, taking URL fixup into account.
// Chrome does not support trailing slashes or paths for about:blank.
const base::string16 blank_host = base::ASCIIToUTF16("blank");
const base::string16 host = base::UTF8ToUTF16(url.host());
if (base::StartsWith(text, base::ASCIIToUTF16(url::kAboutScheme),
false) &&
base::StartsWith(blank_host, host, false) &&
(url.path().length() <= 1) &&
!EndsWith(text, base::ASCIIToUTF16("/"), false)) {
ACMatchClassifications styles;
styles.push_back(ACMatchClassification(0, kMatch));
base::string16 match = base::ASCIIToUTF16(url::kAboutBlankURL);
// Measure the length of the matching host after the "about:" scheme.
const size_t corrected_length = kAboutSchemeLength + 1 + host.length();
if (blank_host.length() > host.length())
styles.push_back(ACMatchClassification(corrected_length, kUrl));
AddMatch(match, match.substr(corrected_length), styles);
}
// Include the path for sub-pages (e.g. "chrome://settings/browser").
base::string16 host_and_path = base::UTF8ToUTF16(url.host() + url.path());
base::TrimString(host_and_path, base::ASCIIToUTF16("/"), &host_and_path);
size_t match_length = kChrome.length() + host_and_path.length();
for (Builtins::const_iterator i(builtins_.begin());
(i != builtins_.end()) && (matches_.size() < kMaxMatches); ++i) {
if (base::StartsWith(*i, host_and_path, false)) {
ACMatchClassifications styles;
// Highlight the "chrome://" scheme, even for input "about:foo".
styles.push_back(ACMatchClassification(0, kMatch));
base::string16 match_string = kChrome + *i;
if (match_string.length() > match_length)
styles.push_back(ACMatchClassification(match_length, kUrl));
AddMatch(match_string, match_string.substr(match_length), styles);
}
}
}
}
for (size_t i = 0; i < matches_.size(); ++i)
matches_[i].relevance = kRelevance + matches_.size() - (i + 1);
if (!HistoryProvider::PreventInlineAutocomplete(input) &&
(matches_.size() == 1)) {
// If there's only one possible completion of the user's input and
// allowing completions is okay, give the match a high enough score to
// allow it to beat url-what-you-typed and be inlined.
matches_[0].relevance = 1250;
matches_[0].allowed_to_be_default_match = true;
}
}
BuiltinProvider::~BuiltinProvider() {}
void BuiltinProvider::AddMatch(const base::string16& match_string,
const base::string16& inline_completion,
const ACMatchClassifications& styles) {
AutocompleteMatch match(this, kRelevance, false,
AutocompleteMatchType::NAVSUGGEST);
match.fill_into_edit = match_string;
match.inline_autocompletion = inline_completion;
match.destination_url = GURL(match_string);
match.contents = match_string;
match.contents_class = styles;
matches_.push_back(match);
}
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