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diff --git a/contexts/data/lib/closure-library/closure/goog/editor/plugins/linkdialogplugin.js b/contexts/data/lib/closure-library/closure/goog/editor/plugins/linkdialogplugin.js
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--- a/contexts/data/lib/closure-library/closure/goog/editor/plugins/linkdialogplugin.js
+++ /dev/null
@@ -1,437 +0,0 @@
-// Copyright 2008 The Closure Library Authors. All Rights Reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS-IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-/**
- * @fileoverview A plugin for the LinkDialog.
- *
- * @author nicksantos@google.com (Nick Santos)
- * @author marcosalmeida@google.com (Marcos Almeida)
- * @author robbyw@google.com (Robby Walker)
- */
-
-goog.provide('goog.editor.plugins.LinkDialogPlugin');
-
-goog.require('goog.array');
-goog.require('goog.dom');
-goog.require('goog.editor.Command');
-goog.require('goog.editor.plugins.AbstractDialogPlugin');
-goog.require('goog.events.EventHandler');
-goog.require('goog.functions');
-goog.require('goog.ui.editor.AbstractDialog.EventType');
-goog.require('goog.ui.editor.LinkDialog');
-goog.require('goog.ui.editor.LinkDialog.EventType');
-goog.require('goog.ui.editor.LinkDialog.OkEvent');
-goog.require('goog.uri.utils');
-
-
-
-/**
- * A plugin that opens the link dialog.
- * @constructor
- * @extends {goog.editor.plugins.AbstractDialogPlugin}
- */
-goog.editor.plugins.LinkDialogPlugin = function() {
-  goog.base(this, goog.editor.Command.MODAL_LINK_EDITOR);
-
-  /**
-   * Event handler for this object.
-   * @type {goog.events.EventHandler}
-   * @private
-   */
-  this.eventHandler_ = new goog.events.EventHandler(this);
-
-
-  /**
-   * A list of whitelisted URL schemes which are safe to open.
-   * @type {Array.<string>}
-   * @private
-   */
-  this.safeToOpenSchemes_ = ['http', 'https', 'ftp'];
-};
-goog.inherits(goog.editor.plugins.LinkDialogPlugin,
-    goog.editor.plugins.AbstractDialogPlugin);
-
-
-/**
- * Link object that the dialog is editing.
- * @type {goog.editor.Link}
- * @protected
- */
-goog.editor.plugins.LinkDialogPlugin.prototype.currentLink_;
-
-
-/**
- * Optional warning to show about email addresses.
- * @type {string|undefined}
- * @private
- */
-goog.editor.plugins.LinkDialogPlugin.prototype.emailWarning_;
-
-
-/**
- * Whether to show a checkbox where the user can choose to have the link open in
- * a new window.
- * @type {boolean}
- * @private
- */
-goog.editor.plugins.LinkDialogPlugin.prototype.showOpenLinkInNewWindow_ = false;
-
-
-/**
- * Whether the "open link in new window" checkbox should be checked when the
- * dialog is shown, and also whether it was checked last time the dialog was
- * closed.
- * @type {boolean}
- * @private
- */
-goog.editor.plugins.LinkDialogPlugin.prototype.isOpenLinkInNewWindowChecked_ =
-    false;
-
-
-/**
- * Weather to show a checkbox where the user can choose to add 'rel=nofollow'
- * attribute added to the link.
- * @type {boolean}
- * @private
- */
-goog.editor.plugins.LinkDialogPlugin.prototype.showRelNoFollow_ = false;
-
-
-/**
- * Whether to stop referrer leaks.  Defaults to false.
- * @type {boolean}
- * @private
- */
-goog.editor.plugins.LinkDialogPlugin.prototype.stopReferrerLeaks_ = false;
-
-
-/**
- * Whether to block opening links with a non-whitelisted URL scheme.
- * @type {boolean}
- * @private
- */
-goog.editor.plugins.LinkDialogPlugin.prototype.blockOpeningUnsafeSchemes_ =
-    true;
-
-
-/** @override */
-goog.editor.plugins.LinkDialogPlugin.prototype.getTrogClassId =
-    goog.functions.constant('LinkDialogPlugin');
-
-
-/**
- * Tells the plugin whether to block URLs with schemes not in the whitelist.
- * If blocking is enabled, this plugin will stop the 'Test Link' popup
- * window from being created. Blocking doesn't affect link creation--if the
- * user clicks the 'OK' button with an unsafe URL, the link will still be
- * created as normal.
- * @param {boolean} blockOpeningUnsafeSchemes Whether to block non-whitelisted
- *     schemes.
- */
-goog.editor.plugins.LinkDialogPlugin.prototype.setBlockOpeningUnsafeSchemes =
-    function(blockOpeningUnsafeSchemes) {
-  this.blockOpeningUnsafeSchemes_ = blockOpeningUnsafeSchemes;
-};
-
-
-/**
- * Sets a whitelist of allowed URL schemes that are safe to open.
- * Schemes should all be in lowercase. If the plugin is set to block opening
- * unsafe schemes, user-entered URLs will be converted to lowercase and checked
- * against this list. The whitelist has no effect if blocking is not enabled.
- * @param {Array.<String>} schemes String array of URL schemes to allow (http,
- *     https, etc.).
- */
-goog.editor.plugins.LinkDialogPlugin.prototype.setSafeToOpenSchemes =
-    function(schemes) {
-  this.safeToOpenSchemes_ = schemes;
-};
-
-
-/**
- * Tells the dialog to show a checkbox where the user can choose to have the
- * link open in a new window.
- * @param {boolean} startChecked Whether to check the checkbox the first
- *     time the dialog is shown. Subesquent times the checkbox will remember its
- *     previous state.
- */
-goog.editor.plugins.LinkDialogPlugin.prototype.showOpenLinkInNewWindow =
-    function(startChecked) {
-  this.showOpenLinkInNewWindow_ = true;
-  this.isOpenLinkInNewWindowChecked_ = startChecked;
-};
-
-
-/**
- * Tells the dialog to show a checkbox where the user can choose to have
- * 'rel=nofollow' attribute added to the link.
- */
-goog.editor.plugins.LinkDialogPlugin.prototype.showRelNoFollow = function() {
-  this.showRelNoFollow_ = true;
-};
-
-
-/**
- * Returns whether the"open link in new window" checkbox was checked last time
- * the dialog was closed.
- * @return {boolean} Whether the"open link in new window" checkbox was checked
- *     last time the dialog was closed.
- */
-goog.editor.plugins.LinkDialogPlugin.prototype.
-    getOpenLinkInNewWindowCheckedState = function() {
-  return this.isOpenLinkInNewWindowChecked_;
-};
-
-
-/**
- * Tells the plugin to stop leaking the page's url via the referrer header when
- * the "test this link" link is clicked. When the user clicks on a link, the
- * browser makes a request for the link url, passing the url of the current page
- * in the request headers. If the user wants the current url to be kept secret
- * (e.g. an unpublished document), the owner of the url that was clicked will
- * see the secret url in the request headers, and it will no longer be a secret.
- * Calling this method will not send a referrer header in the request, just as
- * if the user had opened a blank window and typed the url in themselves.
- */
-goog.editor.plugins.LinkDialogPlugin.prototype.stopReferrerLeaks = function() {
-  this.stopReferrerLeaks_ = true;
-};
-
-
-/**
- * Sets the warning message to show to users about including email addresses on
- * public web pages.
- * @param {string} emailWarning Warning message to show users about including
- *     email addresses on the web.
- */
-goog.editor.plugins.LinkDialogPlugin.prototype.setEmailWarning = function(
-    emailWarning) {
-  this.emailWarning_ = emailWarning;
-};
-
-
-/**
- * Handles execCommand by opening the dialog.
- * @param {string} command The command to execute.
- * @param {*=} opt_arg {@link A goog.editor.Link} object representing the link
- *     being edited.
- * @return {*} Always returns true, indicating the dialog was shown.
- * @protected
- * @override
- */
-goog.editor.plugins.LinkDialogPlugin.prototype.execCommandInternal = function(
-    command, opt_arg) {
-  this.currentLink_ = /** @type {goog.editor.Link} */(opt_arg);
-  return goog.base(this, 'execCommandInternal', command, opt_arg);
-};
-
-
-/**
- * Handles when the dialog closes.
- * @param {goog.events.Event} e The AFTER_HIDE event object.
- * @override
- * @protected
- */
-goog.editor.plugins.LinkDialogPlugin.prototype.handleAfterHide = function(e) {
-  goog.base(this, 'handleAfterHide', e);
-  this.currentLink_ = null;
-};
-
-
-/**
- * @return {goog.events.EventHandler} The event handler.
- * @protected
- */
-goog.editor.plugins.LinkDialogPlugin.prototype.getEventHandler = function() {
-  return this.eventHandler_;
-};
-
-
-/**
- * @return {goog.editor.Link} The link being edited.
- * @protected
- */
-goog.editor.plugins.LinkDialogPlugin.prototype.getCurrentLink = function() {
-  return this.currentLink_;
-};
-
-
-/**
- * Creates a new instance of the dialog and registers for the relevant events.
- * @param {goog.dom.DomHelper} dialogDomHelper The dom helper to be used to
- *     create the dialog.
- * @param {*=} opt_link The target link (should be a goog.editor.Link).
- * @return {goog.ui.editor.LinkDialog} The dialog.
- * @override
- * @protected
- */
-goog.editor.plugins.LinkDialogPlugin.prototype.createDialog = function(
-    dialogDomHelper, opt_link) {
-  var dialog = new goog.ui.editor.LinkDialog(dialogDomHelper,
-      /** @type {goog.editor.Link} */ (opt_link));
-  if (this.emailWarning_) {
-    dialog.setEmailWarning(this.emailWarning_);
-  }
-  if (this.showOpenLinkInNewWindow_) {
-    dialog.showOpenLinkInNewWindow(this.isOpenLinkInNewWindowChecked_);
-  }
-  if (this.showRelNoFollow_) {
-    dialog.showRelNoFollow();
-  }
-  dialog.setStopReferrerLeaks(this.stopReferrerLeaks_);
-  this.eventHandler_.
-      listen(dialog, goog.ui.editor.AbstractDialog.EventType.OK,
-          this.handleOk).
-      listen(dialog, goog.ui.editor.AbstractDialog.EventType.CANCEL,
-          this.handleCancel_).
-      listen(dialog, goog.ui.editor.LinkDialog.EventType.BEFORE_TEST_LINK,
-          this.handleBeforeTestLink);
-  return dialog;
-};
-
-
-/** @override */
-goog.editor.plugins.LinkDialogPlugin.prototype.disposeInternal = function() {
-  goog.base(this, 'disposeInternal');
-  this.eventHandler_.dispose();
-};
-
-
-/**
- * Handles the OK event from the dialog by updating the link in the field.
- * @param {goog.ui.editor.LinkDialog.OkEvent} e OK event object.
- * @protected
- */
-goog.editor.plugins.LinkDialogPlugin.prototype.handleOk = function(e) {
-  // We're not restoring the original selection, so clear it out.
-  this.disposeOriginalSelection();
-
-  this.currentLink_.setTextAndUrl(e.linkText, e.linkUrl);
-  if (this.showOpenLinkInNewWindow_) {
-    // Save checkbox state for next time.
-    this.isOpenLinkInNewWindowChecked_ = e.openInNewWindow;
-  }
-
-  var anchor = this.currentLink_.getAnchor();
-  this.touchUpAnchorOnOk_(anchor, e);
-  var extraAnchors = this.currentLink_.getExtraAnchors();
-  for (var i = 0; i < extraAnchors.length; ++i) {
-    extraAnchors[i].href = anchor.href;
-    this.touchUpAnchorOnOk_(extraAnchors[i], e);
-  }
-
-  this.getFieldObject().focus();
-
-  // Place cursor to the right of the modified link.
-  this.currentLink_.placeCursorRightOf();
-
-  this.getFieldObject().dispatchSelectionChangeEvent();
-  this.getFieldObject().dispatchChange();
-
-  this.eventHandler_.removeAll();
-};
-
-
-/**
- * Apply the necessary properties to a link upon Ok being clicked in the dialog.
- * @param {HTMLAnchorElement} anchor The anchor to set properties on.
- * @param {goog.events.Event} e Event object.
- * @private
- */
-goog.editor.plugins.LinkDialogPlugin.prototype.touchUpAnchorOnOk_ =
-    function(anchor, e) {
-  if (this.showOpenLinkInNewWindow_) {
-    if (e.openInNewWindow) {
-      anchor.target = '_blank';
-    } else {
-      if (anchor.target == '_blank') {
-        anchor.target = '';
-      }
-      // If user didn't indicate to open in a new window but the link already
-      // had a target other than '_blank', let's leave what they had before.
-    }
-  }
-
-  if (this.showRelNoFollow_) {
-    var alreadyPresent = goog.ui.editor.LinkDialog.hasNoFollow(anchor.rel);
-    if (alreadyPresent && !e.noFollow) {
-      anchor.rel = goog.ui.editor.LinkDialog.removeNoFollow(anchor.rel);
-    } else if (!alreadyPresent && e.noFollow) {
-      anchor.rel = anchor.rel ? anchor.rel + ' nofollow' : 'nofollow';
-    }
-  }
-};
-
-
-/**
- * Handles the CANCEL event from the dialog by clearing the anchor if needed.
- * @param {goog.events.Event} e Event object.
- * @private
- */
-goog.editor.plugins.LinkDialogPlugin.prototype.handleCancel_ = function(e) {
-  if (this.currentLink_.isNew()) {
-    goog.dom.flattenElement(this.currentLink_.getAnchor());
-    var extraAnchors = this.currentLink_.getExtraAnchors();
-    for (var i = 0; i < extraAnchors.length; ++i) {
-      goog.dom.flattenElement(extraAnchors[i]);
-    }
-    // Make sure listeners know the anchor was flattened out.
-    this.getFieldObject().dispatchChange();
-  }
-
-  this.eventHandler_.removeAll();
-};
-
-
-/**
- * Handles the BeforeTestLink event fired when the 'test' link is clicked.
- * @param {goog.ui.editor.LinkDialog.BeforeTestLinkEvent} e BeforeTestLink event
- *     object.
- * @protected
- */
-goog.editor.plugins.LinkDialogPlugin.prototype.handleBeforeTestLink =
-    function(e) {
-  if (!this.shouldOpenUrl(e.url)) {
-    /** @desc Message when the user tries to test (preview) a link, but the
-     * link cannot be tested. */
-    var MSG_UNSAFE_LINK = goog.getMsg('This link cannot be tested.');
-    alert(MSG_UNSAFE_LINK);
-    e.preventDefault();
-  }
-};
-
-
-/**
- * Checks whether the plugin should open the given url in a new window.
- * @param {string} url The url to check.
- * @return {boolean} If the plugin should open the given url in a new window.
- * @protected
- */
-goog.editor.plugins.LinkDialogPlugin.prototype.shouldOpenUrl = function(url) {
-  return !this.blockOpeningUnsafeSchemes_ || this.isSafeSchemeToOpen_(url);
-};
-
-
-/**
- * Determines whether or not a url has a scheme which is safe to open.
- * Schemes like javascript are unsafe due to the possibility of XSS.
- * @param {string} url A url.
- * @return {boolean} Whether the url has a safe scheme.
- * @private
- */
-goog.editor.plugins.LinkDialogPlugin.prototype.isSafeSchemeToOpen_ =
-    function(url) {
-  var scheme = goog.uri.utils.getScheme(url) || 'http';
-  return goog.array.contains(this.safeToOpenSchemes_, scheme.toLowerCase());
-};