1 files changed, 0 insertions, 334 deletions
diff --git a/chromium/chrome/browser/resources/chromeos/chromevox/braille/liblouis.js b/chromium/chrome/browser/resources/chromeos/chromevox/braille/liblouis.js
deleted file mode 100644
index 0b8a2ee0006..00000000000
--- a/chromium/chrome/browser/resources/chromeos/chromevox/braille/liblouis.js
+++ /dev/null
@@ -1,334 +0,0 @@
-// 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 JavaScript shim for the liblouis Native Client wrapper.
- */
-
-goog.provide('cvox.LibLouis');
-
-
-/**
- * Encapsulates a liblouis Native Client instance in the page.
- * @constructor
- * @param {string} nmfPath Path to .nmf file for the module.
- * @param {string=} opt_tablesDir Path to tables directory.
- */
-cvox.LibLouis = function(nmfPath, opt_tablesDir) {
-  /**
-   * Path to .nmf file for the module.
-   * @private {string}
-   */
-  this.nmfPath_ = nmfPath;
-
-  /**
-   * Path to translation tables.
-   * @private {?string}
-   */
-  this.tablesDir_ = goog.isDef(opt_tablesDir) ? opt_tablesDir : null;
-
-  /**
-   * Native Client <embed> element.
-   * {@code null} when no <embed> is attached to the DOM.
-   * @private {HTMLEmbedElement}
-   */
-  this.embedElement_ = null;
-
-  /**
-   * Pending RPC callbacks. Maps from message IDs to callbacks.
-   * @private {!Object<function(!Object)>}
-   */
-  this.pendingRpcCallbacks_ = {};
-
-  /**
-   * Next message ID to be used. Incremented with each sent message.
-   * @private {number}
-   */
-  this.nextMessageId_ = 1;
-};
-
-
-/**
- * Set to {@code true} to enable debug logging of RPC messages.
- * @type {boolean}
- */
-cvox.LibLouis.DEBUG = false;
-
-
-/**
- * Attaches the Native Client wrapper to the DOM as a child of the provided
- * element, assumed to already be in the document.
- * @param {!Element} elem Desired parent element of the instance.
- */
-cvox.LibLouis.prototype.attachToElement = function(elem) {
-  if (this.isAttached()) {
-    throw Error('Instance already attached');
-  }
-
-  var embed = document.createElement('embed');
-  embed.src = this.nmfPath_;
-  embed.type = 'application/x-nacl';
-  embed.width = 0;
-  embed.height = 0;
-  if (!goog.isNull(this.tablesDir_)) {
-    embed.setAttribute('tablesdir', this.tablesDir_);
-  }
-  embed.addEventListener('load', goog.bind(this.onInstanceLoad_, this),
-      false /* useCapture */);
-  embed.addEventListener('error', goog.bind(this.onInstanceError_, this),
-      false /* useCapture */);
-  embed.addEventListener('message', goog.bind(this.onInstanceMessage_, this),
-      false /* useCapture */);
-  elem.appendChild(embed);
-  this.embedElement_ = /** @type {!HTMLEmbedElement} */ (embed);
-};
-
-
-/**
- * Detaches the Native Client instance from the DOM.
- */
-cvox.LibLouis.prototype.detach = function() {
-  if (!this.isAttached()) {
-    throw Error('cannot detach unattached instance');
-  }
-
-  this.embedElement_.parentNode.removeChild(this.embedElement_);
-  this.embedElement_ = null;
-  for (var id in this.pendingRpcCallbacks_) {
-    this.pendingRpcCallbacks_[id]({});
-  }
-  this.pendingRpcCallbacks_ = {};
-};
-
-
-/**
- * Determines whether the Native Client instance is attached.
- * @return {boolean} {@code true} if the <embed> element is attached to the DOM.
- */
-cvox.LibLouis.prototype.isAttached = function() {
-  return this.embedElement_ !== null;
-};
-
-
-/**
- * Returns a translator for the desired table, asynchronously.
- * This object must be attached to a document when requesting a translator.
- * @param {string} tableNames Comma separated list of braille table names for
- *     liblouis.
- * @param {function(cvox.LibLouis.Translator)} callback
- *     Callback which will receive the translator, or {@code null} on failure.
- */
-cvox.LibLouis.prototype.getTranslator = function(tableNames, callback) {
-  if (!this.isAttached()) {
-    callback(null /* translator */);
-    return;
-  }
-  this.rpc_('CheckTable', { 'table_names': tableNames }, function(reply) {
-    if (reply['success']) {
-      var translator = new cvox.LibLouis.Translator(this, tableNames);
-      callback(translator);
-    } else {
-      callback(null /* translator */);
-    }
-  }.bind(this));
-};
-
-
-/**
- * Dispatches a message to the remote end and returns the reply asynchronously.
- * A message ID will be automatically assigned (as a side-effect).
- * @param {string} command Command name to be sent.
- * @param {!Object} message JSONable message to be sent.
- * @param {function(!Object)} callback Callback to receive the reply.
- * @private
- */
-cvox.LibLouis.prototype.rpc_ =
-    function(command, message, callback) {
-  if (!this.isAttached()) {
-    throw Error('Cannot send RPC: liblouis instance not loaded');
-  }
-  var messageId = '' + this.nextMessageId_++;
-  message['message_id'] = messageId;
-  message['command'] = command;
-  var json = JSON.stringify(message);
-  if (cvox.LibLouis.DEBUG) {
-    window.console.debug('RPC -> ' + json);
-  }
-  this.embedElement_.postMessage(json);
-  this.pendingRpcCallbacks_[messageId] = callback;
-};
-
-
-/**
- * Invoked when the Native Client instance successfully loads.
- * @param {Event} e Event dispatched after loading.
- * @private
- */
-cvox.LibLouis.prototype.onInstanceLoad_ = function(e) {
-  window.console.info('loaded liblouis Native Client instance');
-};
-
-
-/**
- * Invoked when the Native Client instance fails to load.
- * @param {Event} e Event dispatched after loading failure.
- * @private
- */
-cvox.LibLouis.prototype.onInstanceError_ = function(e) {
-  window.console.error('failed to load liblouis Native Client instance');
-  this.detach();
-};
-
-
-/**
- * Invoked when the Native Client instance posts a message.
- * @param {Event} e Event dispatched after the message was posted.
- * @private
- */
-cvox.LibLouis.prototype.onInstanceMessage_ = function(e) {
-  if (cvox.LibLouis.DEBUG) {
-    window.console.debug('RPC <- ' + e.data);
-  }
-  var message = /** @type {!Object} */ (JSON.parse(e.data));
-  var messageId = message['in_reply_to'];
-  if (!goog.isDef(messageId)) {
-    window.console.warn('liblouis Native Client module sent message with no ID',
-        message);
-    return;
-  }
-  if (goog.isDef(message['error'])) {
-    window.console.error('liblouis Native Client error', message['error']);
-  }
-  var callback = this.pendingRpcCallbacks_[messageId];
-  if (goog.isDef(callback)) {
-    delete this.pendingRpcCallbacks_[messageId];
-    callback(message);
-  }
-};
-
-
-/**
- * Braille translator which uses a Native Client instance of liblouis.
- * @constructor
- * @param {!cvox.LibLouis} instance The instance wrapper.
- * @param {string} tableNames Comma separated list of Table names to be passed
- *     to liblouis.
- */
-cvox.LibLouis.Translator = function(instance, tableNames) {
-  /**
-   * The instance wrapper.
-   * @private {!cvox.LibLouis}
-   */
-  this.instance_ = instance;
-
-  /**
-   * The table name.
-   * @private {string}
-   */
-  this.tableNames_ = tableNames;
-};
-
-
-/**
- * Translates text into braille cells.
- * @param {string} text Text to be translated.
- * @param {function(ArrayBuffer, Array<number>, Array<number>)} callback
- *     Callback for result.  Takes 3 parameters: the resulting cells,
- *     mapping from text to braille positions and mapping from braille to
- *     text positions.  If translation fails for any reason, all parameters are
- *     {@code null}.
- */
-cvox.LibLouis.Translator.prototype.translate = function(text, callback) {
-  if (!this.instance_.isAttached()) {
-    callback(null /*cells*/, null /*textToBraille*/, null /*brailleToText*/);
-    return;
-  }
-  var message = { 'table_names': this.tableNames_, 'text': text };
-  this.instance_.rpc_('Translate', message, function(reply) {
-    var cells = null;
-    var textToBraille = null;
-    var brailleToText = null;
-    if (reply['success'] && goog.isString(reply['cells'])) {
-      cells = cvox.LibLouis.Translator.decodeHexString_(reply['cells']);
-      if (goog.isDef(reply['text_to_braille'])) {
-        textToBraille = reply['text_to_braille'];
-      }
-      if (goog.isDef(reply['braille_to_text'])) {
-        brailleToText = reply['braille_to_text'];
-      }
-    } else if (text.length > 0) {
-      // TODO(plundblad): The nacl wrapper currently returns an error
-      // when translating an empty string.  Address that and always log here.
-      console.error('Braille translation error for ' + JSON.stringify(message));
-    }
-    callback(cells, textToBraille, brailleToText);
-  });
-};
-
-
-/**
- * Translates braille cells into text.
- * @param {!ArrayBuffer} cells Cells to be translated.
- * @param {function(?string)} callback Callback for result.
- */
-cvox.LibLouis.Translator.prototype.backTranslate =
-    function(cells, callback) {
-  if (!this.instance_.isAttached()) {
-    callback(null /*text*/);
-    return;
-  }
-  if (cells.byteLength == 0) {
-    // liblouis doesn't handle empty input, so handle that trivially
-    // here.
-    callback('');
-    return;
-  }
-  var message = {
-    'table_names': this.tableNames_,
-    'cells': cvox.LibLouis.Translator.encodeHexString_(cells)
-  };
-  this.instance_.rpc_('BackTranslate', message, function(reply) {
-    if (reply['success'] && goog.isString(reply['text'])) {
-      callback(reply['text']);
-    } else {
-      callback(null /* text */);
-    }
-  });
-};
-
-
-/**
- * Decodes a hexadecimal string to an {@code ArrayBuffer}.
- * @param {string} hex Hexadecimal string.
- * @return {!ArrayBuffer} Decoded binary data.
- * @private
- */
-cvox.LibLouis.Translator.decodeHexString_ = function(hex) {
-  if (!/^([0-9a-f]{2})*$/i.test(hex)) {
-    throw Error('invalid hexadecimal string');
-  }
-  var array = new Uint8Array(hex.length / 2);
-  var idx = 0;
-  for (var i = 0; i < hex.length; i += 2) {
-    array[idx++] = parseInt(hex.substring(i, i + 2), 16);
-  }
-  return array.buffer;
-};
-
-
-/**
- * Encodes an {@code ArrayBuffer} in hexadecimal.
- * @param {!ArrayBuffer} arrayBuffer Binary data.
- * @return {string} Hexadecimal string.
- * @private
- */
-cvox.LibLouis.Translator.encodeHexString_ = function(arrayBuffer) {
-  var array = new Uint8Array(arrayBuffer);
-  var hex = '';
-  for (var i = 0; i < array.length; i++) {
-    var b = array[i];
-    hex += (b < 0x10 ? '0' : '') + b.toString(16);
-  }
-  return hex;
-};