chrome/renderer/spellchecker/hunspell_engine.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_RENDERER_SPELLCHECKER_HUNSPELL_ENGINE_H_
   6 #define CHROME_RENDERER_SPELLCHECKER_HUNSPELL_ENGINE_H_
   7
   8 #include <string>
   9 #include <vector>
  10
  11 #include "base/memory/scoped_ptr.h"
  12 #include "base/strings/string16.h"
  13 #include "base/strings/utf_string_conversions.h"
  14 #include "chrome/common/spellcheck_common.h"
  15 #include "chrome/renderer/spellchecker/spelling_engine.h"
  16
  17 class Hunspell;
  18
  19 namespace base {
  20 class MemoryMappedFile;
  21 }
  22
  23 class HunspellEngine : public SpellingEngine {
  24  public:
  25   HunspellEngine();
  26   virtual ~HunspellEngine();
  27
  28   virtual void Init(base::File file) OVERRIDE;
  29
  30   virtual bool InitializeIfNeeded() OVERRIDE;
  31   virtual bool IsEnabled() OVERRIDE;
  32   virtual bool CheckSpelling(const base::string16& word_to_check,
  33                              int tag) OVERRIDE;
  34   virtual void FillSuggestionList(
  35       const base::string16& wrong_word,
  36       std::vector<base::string16>* optional_suggestions) OVERRIDE;
  37
  38  private:
  39   // Initializes the Hunspell dictionary, or does nothing if |hunspell_| is
  40   // non-null. This blocks.
  41   void InitializeHunspell();
  42
  43   // We memory-map the BDict file.
  44   scoped_ptr<base::MemoryMappedFile> bdict_file_;
  45
  46   // The hunspell dictionary in use.
  47   scoped_ptr<Hunspell> hunspell_;
  48
  49   base::File file_;
  50
  51   // This flag is true if hunspell is enabled.
  52   bool hunspell_enabled_;
  53
  54   // This flag is true if we have been initialized.
  55   // The value indicates whether we should request a
  56   // dictionary from the browser when the render view asks us to check the
  57   // spelling of a word.
  58   bool initialized_;
  59
  60   // This flag is true if we have requested dictionary.
  61   bool dictionary_requested_;
  62 };
  63
  64 #endif  // CHROME_RENDERER_SPELLCHECKER_HUNSPELL_ENGINE_H_