components/omnibox/browser/url_prefix.h

   1 // Copyright 2014 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 COMPONENTS_OMNIBOX_BROWSER_URL_PREFIX_H_
   6 #define COMPONENTS_OMNIBOX_BROWSER_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   // Sees if |text| is inlineable against either |input| or |fixed_up_input|,
  41   // returning the appropriate inline autocomplete offset or
  42   // base::string16::npos if |text| is not inlineable.
  43   // |allow_www_prefix_without_scheme| says whether to consider an input such
  44   // as "foo" to be allowed to match against text "www.foo.com".  This is
  45   // needed because sometimes the string we're matching against here can come
  46   // from a match's fill_into_edit, which can start with "www." without having
  47   // a protocol at the beginning, and we want to allow these matches to be
  48   // inlineable.  ("www." is not otherwise on the default prefix list.)
  49   static size_t GetInlineAutocompleteOffset(
  50       const base::string16& input,
  51       const base::string16& fixed_up_input,
  52       const bool allow_www_prefix_without_scheme,
  53       const base::string16& text);
  54
  55   base::string16 prefix;
  56
  57   // The number of URL components (scheme, domain label, etc.) in the prefix.
  58   // For example, "http://foo.com" and "www.bar.com" each have one component,
  59   // while "ftp://ftp.ftp.com" has two, and "mysite.com" has none.
  60   size_t num_components;
  61 };
  62
  63 #endif  // COMPONENTS_OMNIBOX_BROWSER_URL_PREFIX_H_