Create a new component "autocomplete"

chrome/browser/autocomplete/url_prefix.cc

-// 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/url_prefix.h"
-
-#include "base/basictypes.h"
-#include "base/strings/string_util.h"
-#include "base/strings/utf_string_conversions.h"
-
-namespace {
-
-// Like URLPrefix::BestURLPrefix() except also handles the prefix of
-// "www.".
-const URLPrefix* BestURLPrefixWithWWWCase(
-    const base::string16& text,
-    const base::string16& prefix_suffix) {
-  CR_DEFINE_STATIC_LOCAL(URLPrefix, www_prefix,
-                         (base::ASCIIToUTF16("www."), 1));
-  const URLPrefix* best_prefix = URLPrefix::BestURLPrefix(text, prefix_suffix);
-  if ((best_prefix == NULL) ||
-      (best_prefix->num_components < www_prefix.num_components)) {
-    if (URLPrefix::PrefixMatch(www_prefix, text, prefix_suffix))
-      best_prefix = &www_prefix;
-  }
-  return best_prefix;
-}
-
-}  // namespace
-
-URLPrefix::URLPrefix(const base::string16& prefix, size_t num_components)
-    : prefix(prefix),
-      num_components(num_components) {
-}
-
-// static
-const URLPrefixes& URLPrefix::GetURLPrefixes() {
-  CR_DEFINE_STATIC_LOCAL(URLPrefixes, prefixes, ());
-  if (prefixes.empty()) {
-    prefixes.push_back(URLPrefix(base::ASCIIToUTF16("https://www."), 2));
-    prefixes.push_back(URLPrefix(base::ASCIIToUTF16("http://www."), 2));
-    prefixes.push_back(URLPrefix(base::ASCIIToUTF16("ftp://ftp."), 2));
-    prefixes.push_back(URLPrefix(base::ASCIIToUTF16("ftp://www."), 2));
-    prefixes.push_back(URLPrefix(base::ASCIIToUTF16("https://"), 1));
-    prefixes.push_back(URLPrefix(base::ASCIIToUTF16("http://"), 1));
-    prefixes.push_back(URLPrefix(base::ASCIIToUTF16("ftp://"), 1));
-    prefixes.push_back(URLPrefix(base::string16(), 0));
-  }
-  return prefixes;
-}
-
-// static
-bool URLPrefix::IsURLPrefix(const base::string16& prefix) {
-  const URLPrefixes& list = GetURLPrefixes();
-  for (URLPrefixes::const_iterator i = list.begin(); i != list.end(); ++i)
-    if (i->prefix == prefix)
-      return true;
-  return false;
-}
-
-// static
-const URLPrefix* URLPrefix::BestURLPrefix(const base::string16& text,
-                                          const base::string16& prefix_suffix) {
-  const URLPrefixes& list = GetURLPrefixes();
-  for (URLPrefixes::const_iterator i = list.begin(); i != list.end(); ++i)
-    if (PrefixMatch(*i, text, prefix_suffix))
-      return &(*i);
-  return NULL;
-}
-
-// static
-bool URLPrefix::PrefixMatch(const URLPrefix& prefix,
-                            const base::string16& text,
-                            const base::string16& prefix_suffix) {
-  return StartsWith(text, prefix.prefix + prefix_suffix, false);
-}
-
-// static
-size_t URLPrefix::GetInlineAutocompleteOffset(
-    const base::string16& input,
-    const base::string16& fixed_up_input,
-    const bool allow_www_prefix_without_scheme,
-    const base::string16& text) {
-  const URLPrefix* best_prefix = allow_www_prefix_without_scheme ?
-      BestURLPrefixWithWWWCase(text, input) : BestURLPrefix(text, input);
-  const base::string16* matching_string = &input;
-  // If we failed to find a best_prefix initially, try again using a fixed-up
-  // version of the user input.  This is especially useful to get about: URLs
-  // to inline against chrome:// shortcuts.  (about: URLs are fixed up to the
-  // chrome:// scheme.)
-  if (!best_prefix && !fixed_up_input.empty() && (fixed_up_input != input)) {
-    best_prefix = allow_www_prefix_without_scheme ?
-        BestURLPrefixWithWWWCase(text, fixed_up_input) :
-        BestURLPrefix(text, fixed_up_input);
-    matching_string = &fixed_up_input;
-  }
-  return (best_prefix != NULL) ?
-      (best_prefix->prefix.length() + matching_string->length()) :
-      base::string16::npos;
-}