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// Copyright (c) 2012 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 CHROME_BROWSER_SPELLCHECKER_SPELLCHECK_HUNSPELL_DICTIONARY_H_
#define CHROME_BROWSER_SPELLCHECKER_SPELLCHECK_HUNSPELL_DICTIONARY_H_
#include <string>
#include "base/files/file.h"
#include "base/files/file_path.h"
#include "base/memory/scoped_ptr.h"
#include "base/memory/weak_ptr.h"
#include "base/move.h"
#include "base/observer_list.h"
#include "chrome/browser/spellchecker/spellcheck_dictionary.h"
#include "net/url_request/url_fetcher_delegate.h"
class GURL;
class SpellcheckService;
namespace net {
class URLFetcher;
class URLRequestContextGetter;
} // namespace net
// Defines the browser-side hunspell dictionary and provides access to it.
class SpellcheckHunspellDictionary
: public SpellcheckDictionary,
public net::URLFetcherDelegate,
public base::SupportsWeakPtr<SpellcheckHunspellDictionary> {
public:
// Interface to implement for observers of the Hunspell dictionary.
class Observer {
public:
// The dictionary has been initialized.
virtual void OnHunspellDictionaryInitialized(
const std::string& language) = 0;
// Dictionary download began.
virtual void OnHunspellDictionaryDownloadBegin(
const std::string& language) = 0;
// Dictionary download succeeded.
virtual void OnHunspellDictionaryDownloadSuccess(
const std::string& language) = 0;
// Dictionary download failed.
virtual void OnHunspellDictionaryDownloadFailure(
const std::string& language) = 0;
};
SpellcheckHunspellDictionary(
const std::string& language,
net::URLRequestContextGetter* request_context_getter,
SpellcheckService* spellcheck_service);
~SpellcheckHunspellDictionary() override;
// SpellcheckDictionary implementation:
void Load() override;
// Retry downloading |dictionary_file_|.
void RetryDownloadDictionary(
net::URLRequestContextGetter* request_context_getter);
// Returns true if the dictionary is ready to use.
virtual bool IsReady() const;
const base::File& GetDictionaryFile() const;
const std::string& GetLanguage() const;
bool IsUsingPlatformChecker() const;
// Add an observer for Hunspell dictionary events.
void AddObserver(Observer* observer);
// Remove an observer for Hunspell dictionary events.
void RemoveObserver(Observer* observer);
// Whether dictionary is being downloaded.
bool IsDownloadInProgress();
// Whether dictionary download failed.
bool IsDownloadFailure();
private:
// Dictionary download status.
enum DownloadStatus {
DOWNLOAD_NONE,
DOWNLOAD_IN_PROGRESS,
DOWNLOAD_FAILED,
};
// Dictionary file information to be passed between the FILE and UI threads.
struct DictionaryFile {
MOVE_ONLY_TYPE_FOR_CPP_03(DictionaryFile, RValue)
public:
DictionaryFile();
~DictionaryFile();
// C++03 move emulation of this type.
DictionaryFile(RValue other);
DictionaryFile& operator=(RValue other);
// The desired location of the dictionary file, whether or not it exists.
base::FilePath path;
// The dictionary file.
base::File file;
};
// net::URLFetcherDelegate implementation. Called when dictionary download
// finishes.
void OnURLFetchComplete(const net::URLFetcher* source) override;
// Determine the correct url to download the dictionary.
GURL GetDictionaryURL();
// Attempt to download the dictionary.
void DownloadDictionary(GURL url);
// Figures out the location for the dictionary, verifies its contents, and
// opens it.
static DictionaryFile OpenDictionaryFile(const base::FilePath& path);
// Gets the default location for the dictionary file.
static DictionaryFile InitializeDictionaryLocation(
const std::string& language);
// The reply point for PostTaskAndReplyWithResult, called after the dictionary
// file has been initialized.
void InitializeDictionaryLocationComplete(DictionaryFile file);
// The reply point for PostTaskAndReplyWithResult, called after the dictionary
// file has been saved.
void SaveDictionaryDataComplete(bool dictionary_saved);
// Notify listeners that the dictionary has been initialized.
void InformListenersOfInitialization();
// Notify listeners that the dictionary download failed.
void InformListenersOfDownloadFailure();
// The language of the dictionary file.
std::string language_;
// Whether to use the platform spellchecker instead of Hunspell.
bool use_browser_spellchecker_;
// Used for downloading the dictionary file. SpellcheckHunspellDictionary does
// not hold a reference, and it is only valid to use it on the UI thread.
net::URLRequestContextGetter* request_context_getter_;
// Used for downloading the dictionary file.
scoped_ptr<net::URLFetcher> fetcher_;
SpellcheckService* spellcheck_service_;
// Observers of Hunspell dictionary events.
base::ObserverList<Observer> observers_;
// Status of the dictionary download.
DownloadStatus download_status_;
// Dictionary file path and descriptor.
DictionaryFile dictionary_file_;
base::WeakPtrFactory<SpellcheckHunspellDictionary> weak_ptr_factory_;
DISALLOW_COPY_AND_ASSIGN(SpellcheckHunspellDictionary);
};
#endif // CHROME_BROWSER_SPELLCHECKER_SPELLCHECK_HUNSPELL_DICTIONARY_H_
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