Refactor tabs API handlers out of AccessibilityApiHandler.

chrome/browser/resources/chromeos/chromevox/chromevox/background/tabs_api_handler.js

Index: chrome/browser/resources/chromeos/chromevox/chromevox/background/tabs_api_handler.js
diff --git a/chrome/browser/resources/chromeos/chromevox/chromevox/background/tabs_api_handler.js b/chrome/browser/resources/chromeos/chromevox/chromevox/background/tabs_api_handler.js
new file mode 100644
index 0000000000000000000000000000000000000000..8623331d7523694174119efd59c90e24d00cfaf5
--- /dev/null
+++ b/chrome/browser/resources/chromeos/chromevox/chromevox/background/tabs_api_handler.js
@@ -0,0 +1,142 @@
+// Copyright 2014 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.
+
+/**
+ * @fileoverview Accesses Chrome's tabs extension API and gives
+ * feedback for events that happen in the "Chrome of Chrome".
+ */
+
+goog.provide('cvox.TabsApiHandler');
+
+goog.require('cvox.AbstractEarcons');
+goog.require('cvox.AbstractTts');
+goog.require('cvox.BrailleInterface');
+goog.require('cvox.BrailleUtil');
+goog.require('cvox.NavBraille');
+
+
+/**
+ * Class that adds listeners and handles events from the tabs API.
+ * @constructor
+ * @param {cvox.TtsInterface} tts The TTS to use for speaking.
+ * @param {cvox.BrailleInterface} braille The braille interface to use for
+ * brailling.
+ * @param {cvox.AbstractEarcons} earcons The earcons object to use for playing
+ *        earcons.
+ */
+cvox.TabsApiHandler = function(tts, braille, earcons) {
+  /** @type {cvox.TtsInterface} @private */
+  this.tts_ = tts;
+  /** @type {cvox.BrailleInterface} @private */
+  this.braille_ = braille;
+  /** @type {cvox.AbstractEarcons} @private */
+  this.earcons_ = earcons;
+  /** @type {function(string)} @private */
+  this.msg_ = cvox.ChromeVox.msgs.getMsg.bind(cvox.ChromeVox.msgs);
+
+  chrome.tabs.onCreated.addListener(this.onCreated.bind(this));
+  chrome.tabs.onRemoved.addListener(this.onRemoved.bind(this));
+  chrome.tabs.onActivated.addListener(this.onActivated.bind(this));
+  chrome.tabs.onUpdated.addListener(this.onUpdated.bind(this));
+  chrome.windows.onFocusChanged.addListener(this.onFocusChanged.bind(this));
+};
+
+cvox.TabsApiHandler.prototype = {
+  /**
+   * Handles chrome.tabs.onCreated.
+   * @param {Object} tab
+   */
+  onCreated: function(tab) {
+    if (!cvox.ChromeVox.isActive) {
+      return;
+    }
+    this.tts_.speak(this.msg_('chrome_tab_created'),
+                   cvox.AbstractTts.QUEUE_MODE_FLUSH,
+                   cvox.AbstractTts.PERSONALITY_ANNOUNCEMENT);
+    this.braille_.write(
+        cvox.NavBraille.fromText(this.msg_('chrome_tab_created')));
+    this.earcons_.playEarcon(cvox.AbstractEarcons.OBJECT_OPEN);
+  },
+
+  /**
+   * Handles chrome.tabs.onRemoved.
+   * @param {Object} tab
+   */
+  onRemoved: function(tab) {
+    if (!cvox.ChromeVox.isActive) {
+      return;
+    }
+    this.earcons_.playEarcon(cvox.AbstractEarcons.OBJECT_CLOSE);
+  },
+
+  /**
+   * Handles chrome.tabs.onActivated.
+   * @param {Object} activeInfo
+   */
+  onActivated: function(activeInfo) {
+    if (!cvox.ChromeVox.isActive) {
+      return;
+    }
+    chrome.tabs.get(activeInfo.tabId, function(tab) {
+      if (tab.status == 'loading') {
+        return;
+      }
+      var title = tab.title ? tab.title : tab.url;
+      this.tts_.speak(this.msg_('chrome_tab_selected',
+                         [title]),
+                     cvox.AbstractTts.QUEUE_MODE_FLUSH,
+                     cvox.AbstractTts.PERSONALITY_ANNOUNCEMENT);
+      this.braille_.write(
+          cvox.NavBraille.fromText(this.msg_('chrome_tab_selected', [title])));
+      this.earcons_.playEarcon(cvox.AbstractEarcons.OBJECT_SELECT);
+    }.bind(this));
+  },
+
+  /**
+   * Handles chrome.tabs.onUpdated.
+   * @param {number} tabId
+   * @param {Object} selectInfo
+   */
+  onUpdated: function(tabId, selectInfo) {
+    if (!cvox.ChromeVox.isActive) {
+      return;
+    }
+    chrome.tabs.get(tabId, function(tab) {
+      if (!tab.active) {
+        return;
+      }
+      if (tab.status == 'loading') {
+        this.earcons_.playEarcon(cvox.AbstractEarcons.BUSY_PROGRESS_LOOP);
+      } else {
+        this.earcons_.playEarcon(cvox.AbstractEarcons.TASK_SUCCESS);
+      }
+    }.bind(this));
+  },
+
+  /**
+   * Handles chrome.windows.onFocusChanged.
+   * @param {number} windowId
+   */
+  onFocusChanged: function(windowId) {
+    if (!cvox.ChromeVox.isActive) {
+      return;
+    }
+    if (windowId == chrome.windows.WINDOW_ID_NONE) {
+      return;
+    }
+    chrome.windows.get(windowId, function(window) {
+      chrome.tabs.getSelected(windowId, function(tab) {
+        var msgId = window.incognito ? 'chrome_incognito_window_selected' :
+          'chrome_normal_window_selected';
+        var title = tab.title ? tab.title : tab.url;
+        this.tts_.speak(this.msg_(msgId, [title]),
+                       cvox.AbstractTts.QUEUE_MODE_FLUSH,
+                       cvox.AbstractTts.PERSONALITY_ANNOUNCEMENT);
+        this.braille_.write(
+            cvox.NavBraille.fromText(this.msg_(msgId, [title])));
+        this.earcons_.playEarcon(cvox.AbstractEarcons.OBJECT_SELECT);
+      }.bind(this));
+    }.bind(this));
+  }
+};