Add remaining text/caret navigation commands to ChromeVox Next.

chrome/browser/resources/chromeos/chromevox/cvox2/background/output.js

+// 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 Provides output services for ChromeVox.
+ */
+
+goog.provide('Output');
+
+goog.require('AutomationUtil.Dir');
+goog.require('cursors.Cursor');
+goog.require('cursors.Range');
+goog.require('cursors.Unit');
+
+/** @constructor */
+Output = function() {
+  /** @type {cursors.Range} @private */
+  this.prevRange_ = null;
+};
+
+Output.prototype = {
+  /**
+   * Handles output of the given range.
+   */
+  output: function(range) {
+    var out = {};
+    if (range.isSubNode())
+    out = this.subNode_(range);
+  else
+    out = this.node_(range);
+
+    cvox.ChromeVox.tts.speak(out.text, cvox.QueueMode.FLUSH);
+    cvox.ChromeVox.braille.write(cvox.NavBraille.fromText(out.text));
+    chrome.accessibilityPrivate.setFocusRing(out.locations);
+
+    this.prevRange_ = range;
+  },
+
+  /**
+   * @param {!cursors.Range} range
+   * @return {{text: string, locations: !Array.<Object>}}
+   * @private
+   */
+  node_: function(range) {
+    // Walk the range and collect descriptions.
+    var out = {text: '', locations: []};
+    var cursor = range.getStart();
+    while (cursor.getNode() != range.getEnd().getNode()) {
+      out.text += this.getCursorDesc_(cursor);
+      out.locations.push(cursor.getNode().location);
+      cursor = cursor.move(cursors.Unit.NODE,
+                           cursors.Movement.DIRECTIONAL,
+                           AutomationUtil.Dir.FORWARD);
+    }
+    out.text += this.getCursorDesc_(range.getEnd());
+    out.locations.push(range.getEnd().getNode().location);
+    return out;
+  },
+
+    /**
+   * @param {!cursors.Range} range
+   * @return {{text: string, locations: !Array.<Object>}}
+   * @private
+   */
+  subNode_: function(range) {
+    // TODO(dtseng): Need a way to select subnode ranges (or compute their
+    // rects).
+    var out = {text: '', locations: []};
+    var startIndex = range.getStart().getIndex();
+    var endIndex = range.getEnd().getIndex();
+    if (startIndex === endIndex)
+      endIndex++;
+
+    out.text = range.getStart().getText().substring(startIndex, endIndex);
+
+    return out;
+  },
+
+  // TODO(dtseng): This is just placeholder logic for generating descriptions
+  // pending further design discussion.
+  /**
+   * @param {!cursors.Cursor} cursor
+   * @return {string}
+   * @private
+   */
+  getCursorDesc_: function(cursor) {
+    var node = cursor.getNode();
+    var container = node;
+    while (container &&
+        (container.role == chrome.automation.RoleType.inlineTextBox ||
+        container.role == chrome.automation.RoleType.staticText))
+      container = container.parent();
+
+    var role = container ? container.role : node.role;
+    return [node.attributes.name, node.attributes.value, role].join(', ');
+  }
+};