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
17class Hunspell;
18
19namespace base {
20class MemoryMappedFile;
21}
22
23class 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_
65