Support fixed prefixes and suffixes when extracting terms from search template URLs.

components/search_engines/template_url.h

 // Copyright 2014 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.
 
 #ifndef COMPONENTS_SEARCH_ENGINES_TEMPLATE_URL_H_
 #define COMPONENTS_SEARCH_ENGINES_TEMPLATE_URL_H_
 
 #include <stddef.h>
 
 #include <string>
@@ skipping 449 matching lines @@
   mutable Replacements replacements_;
 
   // Host, port, path, key and location of the search term. These are only set
   // if the url contains one search term.
   mutable std::string host_;
   mutable std::string port_;
   mutable std::string path_;
   mutable std::string search_term_key_;
   mutable size_t search_term_position_in_path_;
   mutable url::Parsed::ComponentType search_term_key_location_;
+  mutable std::string search_term_value_prefix_;
+  mutable std::string search_term_value_suffix_;

[Peter Kasting, 2016/04/21 19:48:57]

I wonder if it would be any simpler/clearer to use a url::Component for this
instead, e.g.

  mutable url::Parsed::ComponentType search_term_key_component_;
  mutable url::Component search_term_value_location_;

[jbroman, 2016/04/21 21:01:42]

I don't understand; IIUC url::Component is a (begin, length) pair.

Suppose the query param is "prefix{searchTerms}suffix"; the beginning position
is fixed, but the length will vary (it will be the length of the actual search
terms, which varies).

[Peter Kasting, 2016/04/21 22:29:46]

Yeah, sorry, I was misconceiving how these were being used.

 
   mutable PostParams post_params_;
 
   // Whether the contained URL is a pre-populated URL.
   bool prepopulated_;
 };
 
 
 // TemplateURL ----------------------------------------------------------------
 
@@ skipping 265 matching lines @@
   TemplateURLRef new_tab_url_ref_;
   TemplateURLRef contextual_search_url_ref_;
   scoped_ptr<AssociatedExtensionInfo> extension_info_;
 
   // TODO(sky): Add date last parsed OSD file.
 
   DISALLOW_COPY_AND_ASSIGN(TemplateURL);
 };
 
 #endif  // COMPONENTS_SEARCH_ENGINES_TEMPLATE_URL_H_