Initial TTS implementation on Mac and Windows.BUG=none.TEST=base extension test. Currently no mocking for the native TTS api's. Manually tested engines with ChromeVox (navigating around a page, expected interrupts, stopping speech, etc.).

Review URL: http://codereview.chromium.org/3149027

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@57595 0039d316-1c4b-4281-b951-d872f2087c98

6 files changed, 149 insertions, 13 deletions

diff --git a/chrome/browser/extensions/extension_function_dispatcher.cc b/chrome/browser/extensions/extension_function_dispatcher.cc
index 51cc8fe..ce0cc58 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/extensions_quota_service.h"
 #include "chrome/browser/extensions/extensions_service.h"
 #include "chrome/browser/profile.h"
@@ -234,12 +232,10 @@ 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..8c7f48a
--- /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..4351068
--- /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..cb4c927
--- /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;
+}
diff --git a/chrome/browser/extensions/extension_tts_apitest.cc b/chrome/browser/extensions/extension_tts_apitest.cc
index 5acda10..b1a035b 100644
--- a/chrome/browser/extensions/extension_tts_apitest.cc
+++ b/chrome/browser/extensions/extension_tts_apitest.cc
@@ -7,20 +7,15 @@
 #include "chrome/common/chrome_switches.h"
 #include "testing/gmock/include/gmock/gmock.h"
 
-// This extension API is currently only supported on Chrome OS.
-#if defined(OS_CHROMEOS)
-#define MAYBE_Tts Tts
-#else
-#define MAYBE_Tts DISABLED_Tts
-#endif
-
-IN_PROC_BROWSER_TEST_F(ExtensionApiTest, MAYBE_Tts) {
+IN_PROC_BROWSER_TEST_F(ExtensionApiTest, Tts) {
   CommandLine::ForCurrentProcess()->AppendSwitch(
       switches::kEnableExperimentalExtensionApis);
 
+  #if defined(OS_CHROMEOS)
   chromeos::CrosMock crosMock;
   crosMock.InitMockSpeechSynthesisLibrary();
   crosMock.SetSpeechSynthesisLibraryExpectations();
+  #endif
 
   ASSERT_TRUE(RunExtensionTest("tts")) << message_;
 }
diff --git a/chrome/chrome_browser.gypi b/chrome/chrome_browser.gypi
index e265b11..4ea29de 100644
--- a/chrome/chrome_browser.gypi
+++ b/chrome/chrome_browser.gypi
@@ -1442,6 +1442,9 @@
         'browser/extensions/extension_test_api.h',
         'browser/extensions/extension_tts_api.cc',
         'browser/extensions/extension_tts_api.h',
+        'browser/extensions/extension_tts_api_gtk.cc',
+        'browser/extensions/extension_tts_api_mac.mm',
+        'browser/extensions/extension_tts_api_win.cc',
         'browser/extensions/extension_toolbar_model.cc',
         'browser/extensions/extension_toolbar_model.h',
         'browser/extensions/extension_updater.cc',
@@ -3090,7 +3093,6 @@
             ['exclude', 'browser/dom_ui/mediaplayer_ui.cc'],
             ['exclude', 'browser/dom_ui/slideshow_ui.cc'],
             ['exclude', 'browser/extensions/extension_tts_api.cc'],
-            ['exclude', 'browser/extensions/extension_tts_api.h'],
             ['exclude', 'browser/renderer_host/offline_resource_handler.cc'],
             ['exclude', 'browser/renderer_host/offline_resource_handler.h'],
           ],
@@ -3810,6 +3812,7 @@
             'browser/bookmarks/bookmark_menu_controller.h',
             'browser/browser_accessibility_win.cc',
             'browser/browser_accessibility_manager_win.cc',
+            'browser/extensions/extension_tts_api_win.cc',
             'browser/google_update.cc',
             'browser/history/history_indexer.idl',
             'browser/history_tab_ui.cc',