In-te-grate hy-phen-ator to con-tent.

content/browser/hyphenator/hyphenator_message_filter.h

+// 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 CONTENT_BROWSER_HYPHENATOR_HYPHENATOR_MESSAGE_FILTER_H_
+#define CONTENT_BROWSER_HYPHENATOR_HYPHENATOR_MESSAGE_FILTER_H_
+
+#include "base/compiler_specific.h"
+#include "base/file_path.h"
+#include "base/memory/weak_ptr.h"
+#include "base/platform_file.h"
+#include "content/common/content_export.h"
+#include "content/public/browser/browser_message_filter.h"
+
+namespace content {
+class RenderProcessHost;
+
+// This class is a message filter that handles a HyphenatorHost message. When
+// this class receives a HyphenatorHostMsg_OpenDictionary message, it opens the
+// specified dictionary and sends its file handle.
+class CONTENT_EXPORT HyphenatorMessageFilter
+    : public content::BrowserMessageFilter {
+ public:
+  explicit HyphenatorMessageFilter(
+      content::RenderProcessHost* render_process_host);
+
+  // Changes the directory that includes dictionary files. This function
+  // provides a method that allows applications to change the directory
+  // containing hyphenation dictionaries. When a renderer requests a hyphnation
+  // dictionary, this class appends a file name (which consists of a locale, a
+  // version number, and an extension) and use it as a dictionary file.
+  void SetDictionaryBase(const FilePath& directory);
+
+  // content::BrowserMessageFilter implementation.
+  virtual void OverrideThreadForMessage(
+      const IPC::Message& message,
+      content::BrowserThread::ID* thread) OVERRIDE;
+  virtual bool OnMessageReceived(const IPC::Message& message,
+                                 bool* message_was_ok) OVERRIDE;
+
+ private:
+  friend class TestHyphenatorMessageFilter;
+
+  virtual ~HyphenatorMessageFilter();
+
+  virtual void OnOpenDictionary(const string16& locale);
+
+  // Opens a hyphenation dictionary for the specified locale. When this locale
+  // is an empty string, this function uses US English ("en-US").
+  void OpenDictionary(const string16& locale);
+
+  // Sends the hyphenation dictionary file to a renderer in response to its
+  // request. If this class cannot open the specified dictionary file, this
+  // function sends an IPC::InvalidPlatformFileForTransit value to tell the
+  // renderer that a browser cannot open the file.
+  void SendDictionary();
+
+  // The RenderProcessHost object that owns this filter. This class uses this
+  // object to retrieve the process handle used for creating
+  // PlatformFileForTransit objects.
+  content::RenderProcessHost* render_process_host_;
+
+  // The directory that includes dictionary files. The default value is the
+  // directory containing the executable file.
+  FilePath dictionary_base_;
+
+  // A cached dictionary file.
+  base::PlatformFile dictionary_file_;
+
+  base::WeakPtrFactory<HyphenatorMessageFilter> weak_factory_;
+
+  DISALLOW_COPY_AND_ASSIGN(HyphenatorMessageFilter);
+};
+
+}  // namespace content
+
+#endif  // CONTENT_BROWSER_HYPHENATOR_HYPHENATOR_MESSAGE_FILTER_H_