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      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_HISTORY_PROVIDER_H_
      6 #define CHROME_BROWSER_AUTOCOMPLETE_HISTORY_PROVIDER_H_
      7 
      8 #include "base/compiler_specific.h"
      9 #include "chrome/browser/autocomplete/autocomplete_provider.h"
     10 
     11 class AutocompleteInput;
     12 struct AutocompleteMatch;
     13 
     14 // This class is a base class for the history autocomplete providers and
     15 // provides functions useful to all derived classes.
     16 class HistoryProvider : public AutocompleteProvider {
     17  public:
     18   virtual void DeleteMatch(const AutocompleteMatch& match) OVERRIDE;
     19 
     20  protected:
     21   HistoryProvider(AutocompleteProviderListener* listener,
     22                   Profile* profile,
     23                   AutocompleteProvider::Type type);
     24   virtual ~HistoryProvider();
     25 
     26   // Finds and removes the match from the current collection of matches and
     27   // backing data.
     28   void DeleteMatchFromMatches(const AutocompleteMatch& match);
     29 
     30   // Fixes up user URL input to make it more possible to match against.  Among
     31   // many other things, this takes care of the following:
     32   // * Prepending file:// to file URLs
     33   // * Converting drive letters in file URLs to uppercase
     34   // * Converting case-insensitive parts of URLs (like the scheme and domain)
     35   //   to lowercase
     36   // * Convert spaces to %20s
     37   // Note that we don't do this in AutocompleteInput's constructor, because if
     38   // e.g. we convert a Unicode hostname to punycode, other providers will show
     39   // output that surprises the user ("Search Google for xn--6ca.com").
     40   // Returns false if the fixup attempt resulted in an empty string (which
     41   // providers generally can't do anything with).
     42   static bool FixupUserInput(AutocompleteInput* input);
     43 
     44   // Trims "http:" and up to two subsequent slashes from |url|.  Returns the
     45   // number of characters that were trimmed.
     46   // NOTE: For a view-source: URL, this will trim from after "view-source:" and
     47   // return 0.
     48   static size_t TrimHttpPrefix(string16* url);
     49 
     50   // Returns true if inline autocompletion should be prevented. Use this instead
     51   // of |input.prevent_inline_autocomplete| if the input is passed through
     52   // FixupUserInput(). This method returns true if
     53   // |input.prevent_inline_autocomplete()| is true or the input text contains
     54   // trailing whitespace.
     55   bool PreventInlineAutocomplete(const AutocompleteInput& input);
     56 };
     57 
     58 #endif  // CHROME_BROWSER_AUTOCOMPLETE_HISTORY_PROVIDER_H_
     59