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::PlatformFile file) OVERRIDE;
29
30  virtual bool InitializeIfNeeded() OVERRIDE;
31  virtual bool IsEnabled() OVERRIDE;
32  virtual bool CheckSpelling(const string16& word_to_check, int tag) OVERRIDE;
33  virtual void FillSuggestionList(const string16& wrong_word,
34                          std::vector<string16>* optional_suggestions) OVERRIDE;
35
36 private:
37  // Initializes the Hunspell dictionary, or does nothing if |hunspell_| is
38  // non-null. This blocks.
39  void InitializeHunspell();
40
41  // We memory-map the BDict file.
42  scoped_ptr<base::MemoryMappedFile> bdict_file_;
43
44  // The hunspell dictionary in use.
45  scoped_ptr<Hunspell> hunspell_;
46
47  base::PlatformFile file_;
48
49  // This flags is true if we have been initialized.
50  // The value indicates whether we should request a
51  // dictionary from the browser when the render view asks us to check the
52  // spelling of a word.
53  bool initialized_;
54
55  // This flags is true if we have requested dictionary.
56  bool dictionary_requested_;
57};
58
59#endif  // CHROME_RENDERER_SPELLCHECKER_HUNSPELL_ENGINE_H_
60