Relanding 3149027.

TBR=dmazzoni,chaitanyag
BUG=none.
TEST=none.

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@58373 0039d316-1c4b-4281-b951-d872f2087c98

4 files changed, 142 insertions, 4 deletions

diff --git a/chrome/browser/extensions/extension_function_dispatcher.cc b/chrome/browser/extensions/extension_function_dispatcher.cc
index dc03bbb..4ded6a6 100644
--- a/chrome/browser/extensions/extension_function_dispatcher.cc
+++ b/chrome/browser/extensions/extension_function_dispatcher.cc
@@ -46,9 +46,7 @@
 #include "chrome/browser/extensions/extension_sidebar_api.h"
 #include "chrome/browser/extensions/extension_tabs_module.h"
 #include "chrome/browser/extensions/extension_test_api.h"
-#if defined(OS_CHROMEOS)
 #include "chrome/browser/extensions/extension_tts_api.h"
-#endif
 #include "chrome/browser/extensions/extension_webstore_private_api.h"
 #include "chrome/browser/extensions/extensions_quota_service.h"
 #include "chrome/browser/extensions/extensions_service.h"
@@ -235,12 +233,10 @@ void FactoryRegistry::ResetFunctions() {
   RegisterFunction<GetFocusedControlFunction>();
   RegisterFunction<SetAccessibilityEnabledFunction>();
 
-#if defined(OS_CHROMEOS)
   // Text-to-speech.
   RegisterFunction<ExtensionTtsSpeakFunction>();
   RegisterFunction<ExtensionTtsStopSpeakingFunction>();
   RegisterFunction<ExtensionTtsIsSpeakingFunction>();
-#endif
 
   // Clipboard.
   RegisterFunction<ExecuteCopyClipboardFunction>();
diff --git a/chrome/browser/extensions/extension_tts_api_gtk.cc b/chrome/browser/extensions/extension_tts_api_gtk.cc
new file mode 100644
index 0000000..6804f92
--- /dev/null
+++ b/chrome/browser/extensions/extension_tts_api_gtk.cc
@@ -0,0 +1,17 @@
+// Copyright (c) 2010 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.

+

+#include "extension_tts_api.h"

+

+bool ExtensionTtsSpeakFunction::RunImpl() {

+  return false;

+}

+

+bool ExtensionTtsStopSpeakingFunction::RunImpl() {

+  return false;

+}

+

+bool ExtensionTtsIsSpeakingFunction::RunImpl() {

+  return false;

+}

diff --git a/chrome/browser/extensions/extension_tts_api_mac.mm b/chrome/browser/extensions/extension_tts_api_mac.mm
new file mode 100644
index 0000000..98e49e3
--- /dev/null
+++ b/chrome/browser/extensions/extension_tts_api_mac.mm
@@ -0,0 +1,39 @@
+// Copyright (c) 2010 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.

+

+#include "extension_tts_api.h"

+

+#include <string>

+

+#include "base/values.h"

+#include "chrome/browser/extensions/extension_function.h"

+

+#import <cocoa/cocoa.h>

+

+static NSSpeechSynthesizer* speech_synthesizer_;

+

+void InitializeSpeechSynthesizer() {

+  if (!speech_synthesizer_)

+    speech_synthesizer_ = [[NSSpeechSynthesizer alloc] init];

+}

+

+bool ExtensionTtsSpeakFunction::RunImpl() {

+  InitializeSpeechSynthesizer();

+  std::string utterance;

+  EXTENSION_FUNCTION_VALIDATE(args_->GetString(0, &utterance));

+  return

+      [speech_synthesizer_ startSpeakingString:

+           [NSString stringWithUTF8String: utterance.c_str()]];

+}

+

+bool ExtensionTtsStopSpeakingFunction::RunImpl() {

+    InitializeSpeechSynthesizer();

+  [speech_synthesizer_ stopSpeaking];

+  return true;

+}

+

+bool ExtensionTtsIsSpeakingFunction::RunImpl() {

+    InitializeSpeechSynthesizer();

+  return [speech_synthesizer_ isSpeaking];

+}

diff --git a/chrome/browser/extensions/extension_tts_api_win.cc b/chrome/browser/extensions/extension_tts_api_win.cc
new file mode 100644
index 0000000..260d047
--- /dev/null
+++ b/chrome/browser/extensions/extension_tts_api_win.cc
@@ -0,0 +1,86 @@
+// Copyright (c) 2010 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.

+

+#include "extension_tts_api.h"

+

+#include <atlbase.h>

+#include <atlcom.h>

+#include <sapi.h>

+

+#include "base/scoped_comptr_win.h"

+#include "base/singleton.h"

+#include "base/values.h"

+

+class SpeechSynthesizerWrapper {

+ public:

+  SpeechSynthesizerWrapper() : speech_synthesizer_(NULL),

+                               paused_(false),

+                               permanent_failure_(false) {

+    InitializeSpeechSynthesizer();

+  }

+

+  bool InitializeSpeechSynthesizer() {

+    if (!SUCCEEDED(CoCreateInstance(CLSID_SpVoice, NULL, CLSCTX_SERVER,

+        IID_ISpVoice, reinterpret_cast<void**>(&speech_synthesizer_)))) {

+      permanent_failure_ = true;

+      return false;

+    }

+

+    if (paused_)

+      speech_synthesizer_->Resume();

+    return true;

+  }

+

+  ScopedComPtr<ISpVoice> speech_synthesizer() {

+    return speech_synthesizer_;

+  }

+

+  bool paused() {

+    return paused_;

+  }

+

+  void paused(bool state) {

+    paused_ = state;

+  }

+

+ private:

+  ScopedComPtr<ISpVoice> speech_synthesizer_;

+  bool paused_;

+  // Indicates an error retrieving the SAPI COM interface.

+  bool permanent_failure_;

+};

+

+typedef Singleton<SpeechSynthesizerWrapper> SpeechSynthesizerSingleton;

+

+bool ExtensionTtsSpeakFunction::RunImpl() {

+  ScopedComPtr<ISpVoice> speech_synthesizer =

+      SpeechSynthesizerSingleton::get()->speech_synthesizer();

+  if (speech_synthesizer) {

+    std::wstring utterance;

+    EXTENSION_FUNCTION_VALIDATE(args_->GetString(0, &utterance));

+    if (SpeechSynthesizerSingleton::get()->paused())

+      speech_synthesizer->Resume();

+    speech_synthesizer->Speak(

+        utterance.c_str(), SPF_ASYNC | SPF_PURGEBEFORESPEAK, NULL);

+    return true;

+  }

+

+  return false;

+}

+

+bool ExtensionTtsStopSpeakingFunction::RunImpl() {

+  // We need to keep track of the paused state since SAPI doesn't have a stop

+  // method.

+  ScopedComPtr<ISpVoice> speech_synthesizer =

+      SpeechSynthesizerSingleton::get()->speech_synthesizer();

+  if (speech_synthesizer && !SpeechSynthesizerSingleton::get()->paused()) {

+    speech_synthesizer->Pause();

+    SpeechSynthesizerSingleton::get()->paused(true);

+  }

+  return true;

+}

+

+bool ExtensionTtsIsSpeakingFunction::RunImpl() {

+  return false;

+}