Moved code dealing with accessibility tree from switch_access.js to new file, automation_manager.js

chrome/browser/resources/chromeos/switch_access/switch_access.js

 // Copyright 2017 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.
 
 /**
  * Class to manage SwitchAccess and interact with other controllers.
  *
  * @constructor
  * @implements {SwitchAccessInterface}
  */
@@ skipping 15 matching lines @@
   this.autoScanManager_ = null;
 
   /**
    * Handles keyboard input.
    *
    * @private {KeyboardHandler}
    */
   this.keyboardHandler_ = null;
 
   /**
-   * Moves to the appropriate node in the accessibility tree.
+   * Handles interactions with the accessibility tree, including moving to and
+   * selecting nodes.
    *
-   * @private {AutomationTreeWalker}
+   * @private {AutomationManager}
    */
-  this.treeWalker_ = null;
-
-  /**
-   * Currently selected node.
-   *
-   * @private {chrome.automation.AutomationNode}
-   */
-  this.node_ = null;
-
-  /**
-   * Root node (i.e., the desktop).
-   *
-   * @private {chrome.automation.AutomationNode}
-   */
-  this.root_ = null;
+  this.automationManager_ = null;
 
   this.init_();
 };
 
 SwitchAccess.prototype = {
   /**
-   * Set this.node_ and this.root_ to the desktop node, and set up preferences,
-   * controllers, and event listeners.
+   * Set up preferences, controllers, and event listeners.
    *
    * @private
    */
   init_: function() {
     this.switchAccessPrefs = new SwitchAccessPrefs();
     this.autoScanManager_ = new AutoScanManager(this);
     this.keyboardHandler_ = new KeyboardHandler(this);
-    this.treeWalker_ = new AutomationTreeWalker();
-
-    chrome.automation.getDesktop(function(desktop) {
-      this.node_ = desktop;
-      this.root_ = desktop;
-      console.log('AutomationNode for desktop is loaded');
-      this.printNode_(this.node_);
-    }.bind(this));
+    this.automationManager_ = new AutomationManager();
 
     document.addEventListener(
         'prefsUpdate', this.handlePrefsUpdate_.bind(this));
   },
 
   /**
-   * Set this.node_ to the next/previous interesting node. If no interesting
-   * node is found, set this.node_ to the first/last interesting node. If
-   * |doNext| is true, will search for next node. Otherwise, will search for
-   * previous node.
+   * Move to the next/previous interesting node. If |doNext| is true, move to
+   * the next node. Otherwise, move to the previous node.
    *
    * @param {boolean} doNext
    * @override
    */
   moveToNode: function(doNext) {
-    let node = this.treeWalker_.moveToNode(this.node_, this.root_, doNext);
-    if (node) {
-      this.node_ = node;
-      this.printNode_(this.node_);
-      chrome.accessibilityPrivate.setFocusRing([this.node_.location]);
-    }
+    this.automationManager_.moveToNode(doNext);
   },
 
   /**
-   * Perform the default action on the currently selected node.
+   * Perform the default action on the current node.
    *
    * @override
    */
   doDefault: function() {
-    if (!this.node_)
-      return;
-
-    this.node_.doDefault();
+    this.automationManager_.doDefault();
   },
 
   /**
    * Open the options page in a new tab.
    *
    * @override
    */
   showOptionsPage: function() {
     let optionsPage = {url: 'options.html'};
     chrome.tabs.create(optionsPage);
@@ skipping 22 matching lines @@
         case 'enableAutoScan':
           this.autoScanManager_.setEnabled(updatedPrefs[key]);
           break;
         case 'autoScanTime':
           this.autoScanManager_.setScanTime(updatedPrefs[key]);
           break;
       }
     }
   },
 
-  // TODO(elichtenberg): Move print functions to a custom logger class. Only
-  // log when debuggingEnabled is true.
   /**
-   * Print out details about a node.
-   *
-   * @param {chrome.automation.AutomationNode} node
-   * @private
-   */
-  printNode_: function(node) {
-    if (node) {
-      console.log('Name = ' + node.name);
-      console.log('Role = ' + node.role);
-      console.log('Root role = ' + node.root.role);
-      if (!node.parent)
-        console.log('At index ' + node.indexInParent + ', has no parent');
-      else {
-        let numSiblings = node.parent.children.length;
-        console.log(
-            'At index ' + node.indexInParent + ', there are '
-            + numSiblings + ' siblings');
-      }
-      console.log('Has ' + node.children.length + ' children');
-    } else {
-      console.log('Node is null');
-    }
-    console.log(node);
-    console.log('\n');
-  },
-
-  /**
-   * Move to the next sibling of this.node_ if it has one.
+   * Move to the next sibling of the current node if it has one.
    *
    * @override
    */
   debugMoveToNext: function() {
-    let next = this.treeWalker_.debugMoveToNext(this.node_);
-    if (next) {
-      this.node_ = next;
-      this.printNode_(this.node_);
-      chrome.accessibilityPrivate.setFocusRing([this.node_.location]);
-    }
+    this.automationManager_.debugMoveToNext();
   },
 
   /**
-   * Move to the previous sibling of this.node_ if it has one.
+   * Move to the previous sibling of the current node if it has one.
    *
    * @override
    */
   debugMoveToPrevious: function() {
-    let prev = this.treeWalker_.debugMoveToPrevious(this.node_);
-    if (prev) {
-      this.node_ = prev;
-      this.printNode_(this.node_);
-      chrome.accessibilityPrivate.setFocusRing([this.node_.location]);
-    }
+    this.automationManager_.debugMoveToPrevious();
   },
 
   /**
-   * Move to the first child of this.node_ if it has one.
+   * Move to the first child of the current node if it has one.
    *
    * @override
    */
   debugMoveToFirstChild: function() {
-    let child = this.treeWalker_.debugMoveToFirstChild(this.node_);
-    if (child) {
-      this.node_ = child;
-      this.printNode_(this.node_);
-      chrome.accessibilityPrivate.setFocusRing([this.node_.location]);
-    }
+    this.automationManager_.debugMoveToFirstChild();
   },
 
   /**
-   * Move to the parent of this.node_ if it has one.
+   * Move to the parent of the current node if it has one.
    *
    * @override
    */
   debugMoveToParent: function() {
-    let parent = this.treeWalker_.debugMoveToParent(this.node_);
-    if (parent) {
-      this.node_ = parent;
-      this.printNode_(this.node_);
-      chrome.accessibilityPrivate.setFocusRing([this.node_.location]);
-    }
+    this.automationManager_.debugMoveToParent();
   }
 };