chrome/browser/autocomplete/url_prefix.h

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef CHROME_BROWSER_AUTOCOMPLETE_URL_PREFIX_H_
   6 #define CHROME_BROWSER_AUTOCOMPLETE_URL_PREFIX_H_
   7
   8 #include <vector>
   9
  10 #include "base/strings/string16.h"
  11
  12 struct URLPrefix;
  13 typedef std::vector<URLPrefix> URLPrefixes;
  14
  15 // A URL prefix; combinations of schemes and (least significant) domain labels
  16 // that may be inferred from certain URL-like input strings.
  17 struct URLPrefix {
  18   URLPrefix(const base::string16& prefix, size_t num_components);
  19
  20   // Returns a vector of URL prefixes sorted by descending number of components.
  21   static const URLPrefixes& GetURLPrefixes();
  22
  23   // Returns if the argument is a valid URL prefix.
  24   static bool IsURLPrefix(const base::string16& prefix);
  25
  26   // Returns the URL prefix of |text| with the most components, or NULL.
  27   // |prefix_suffix| (which may be empty) is appended to every attempted prefix,
  28   // which is useful for finding the innermost match of user input in a URL.
  29   // Performs case insensitive string comparison.
  30   static const URLPrefix* BestURLPrefix(const base::string16& text,
  31                                         const base::string16& prefix_suffix);
  32
  33   // A helper function for BestURLPrefix().  Returns true if |text| starts
  34   // with |prefix| which is then followed by |prefix_suffix|.
  35   // Performs case insensitive string comparison.
  36   static bool PrefixMatch(const URLPrefix& prefix,
  37                           const base::string16& text,
  38                           const base::string16& prefix_suffix);
  39
  40   base::string16 prefix;
  41
  42   // The number of URL components (scheme, domain label, etc.) in the prefix.
  43   // For example, "http://foo.com" and "www.bar.com" each have one component,
  44   // while "ftp://ftp.ftp.com" has two, and "mysite.com" has none.
  45   size_t num_components;
  46 };
  47
  48 #endif  // CHROME_BROWSER_AUTOCOMPLETE_URL_PREFIX_H_