Minimize the Classic API and enable it for Next

chrome/browser/resources/chromeos/chromevox/chromevox/injected/api_util.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 Shared util methods between api.js and api_implementation.js
- * for doing common tasks such as passing node references between page script
- * and ChromeVox.
- */
-
-if (typeof(goog) != 'undefined' && goog.provide){
-  goog.provide('cvox.ApiUtil');
-}
-
-
-if (!window['cvox']) {
-   window['cvox'] = {};
-}
-
-/**
- * @constructor
- */
-cvox.ApiUtils = function() {
-};
-
-/**
- * The next id to use for the cvoxid attribute that we add to elements
- * in order to be able to find them from the content script.
- * @type {number}
- */
-cvox.ApiUtils.nextCvoxId_ = 1;
-
-/**
- * Makes a serializable reference to a node.
- * If the node or its parent has an ID, reference it directly. Otherwise,
- * add a temporary cvoxid attribute. This has a corresponding method in
- * api_implementation.js to decode this and return a node.
- * @param {Node} targetNode The node to reference.
- * @return {Object} A serializable node reference.
- */
-cvox.ApiUtils.makeNodeReference = function(targetNode) {
-  if (targetNode.id && document.getElementById(targetNode.id) == targetNode) {
-    return {'id': targetNode.id};
-  } else if (targetNode instanceof HTMLElement) {
-    var cvoxid = cvox.ApiUtils.nextCvoxId_;
-    targetNode.setAttribute('cvoxid', cvoxid);
-    cvox.ApiUtils.nextCvoxId_ = (cvox.ApiUtils.nextCvoxId_ + 1) % 100;
-    return {'cvoxid': cvoxid};
-  } else if (targetNode.parentElement) {
-    var parent = targetNode.parentElement;
-    var childIndex = -1;
-    for (var i = 0; i < parent.childNodes.length; i++) {
-      if (parent.childNodes[i] == targetNode) {
-        childIndex = i;
-        break;
-      }
-    }
-    if (childIndex >= 0) {
-      var cvoxid = cvox.ApiUtils.nextCvoxId_;
-      parent.setAttribute('cvoxid', cvoxid);
-      cvox.ApiUtils.nextCvoxId_ = (cvox.ApiUtils.nextCvoxId_ + 1) % 100;
-      return {'cvoxid': cvoxid, 'childIndex': childIndex};
-    }
-  }
-  throw 'Cannot reference node: ' + targetNode;
-};
-
-/**
- * Retrieves a node from its serializable node reference.
- *
- * @param {Object} nodeRef A serializable reference to a node.
- * @return {Node} The node on the page that this object refers to.
- */
-cvox.ApiUtils.getNodeFromRef = function(nodeRef) {
-  if (nodeRef['id']) {
-    return document.getElementById(nodeRef['id']);
-  } else if (nodeRef['cvoxid']) {
-    var selector = '*[cvoxid="' + nodeRef['cvoxid'] + '"]';
-    var element = document.querySelector(selector);
-    if (element && element.removeAttribute) {
-      element.removeAttribute('cvoxid');
-    }
-    if (nodeRef['childIndex'] != null) {
-      return element.childNodes[nodeRef['childIndex']];
-    } else {
-      return element;
-    }
-  }
-  throw 'Bad node reference: ' + cvox.ChromeVoxJSON.stringify(nodeRef);
-};