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diff --git a/contexts/data/lib/closure-library/closure/goog/events/filedrophandler.js b/contexts/data/lib/closure-library/closure/goog/events/filedrophandler.js
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--- a/contexts/data/lib/closure-library/closure/goog/events/filedrophandler.js
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@@ -1,220 +0,0 @@
-// Copyright 2010 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 Provides a files drag and drop event detector. It works on
- * HTML5 browsers.
- *
- * @see ../demos/filedrophandler.html
- */
-
-goog.provide('goog.events.FileDropHandler');
-goog.provide('goog.events.FileDropHandler.EventType');
-
-goog.require('goog.array');
-goog.require('goog.debug.Logger');
-goog.require('goog.dom');
-goog.require('goog.events');
-goog.require('goog.events.BrowserEvent');
-goog.require('goog.events.EventHandler');
-goog.require('goog.events.EventTarget');
-goog.require('goog.events.EventType');
-
-
-
-/**
- * A files drag and drop event detector. Gets an {@code element} as parameter
- * and fires {@code goog.events.FileDropHandler.EventType.DROP} event when files
- * are dropped in the {@code element}.
- *
- * @param {Element|Document} element The element or document to listen on.
- * @param {boolean=} opt_preventDropOutside Whether to prevent a drop on the
- * area outside the {@code element}. Default false.
- * @constructor
- * @extends {goog.events.EventTarget}
- */
-goog.events.FileDropHandler = function(element, opt_preventDropOutside) {
- goog.events.EventTarget.call(this);
-
- /**
- * Handler for drag/drop events.
- * @type {!goog.events.EventHandler}
- * @private
- */
- this.eventHandler_ = new goog.events.EventHandler(this);
-
- var doc = element;
- if (opt_preventDropOutside) {
- doc = goog.dom.getOwnerDocument(element);
- }
-
- // Add dragenter listener to the owner document of the element.
- this.eventHandler_.listen(doc,
- goog.events.EventType.DRAGENTER,
- this.onDocDragEnter_);
-
- // Add dragover listener to the owner document of the element only if the
- // document is not the element itself.
- if (doc != element) {
- this.eventHandler_.listen(doc,
- goog.events.EventType.DRAGOVER,
- this.onDocDragOver_);
- }
-
- // Add dragover and drop listeners to the element.
- this.eventHandler_.listen(element,
- goog.events.EventType.DRAGOVER,
- this.onElemDragOver_);
- this.eventHandler_.listen(element,
- goog.events.EventType.DROP,
- this.onElemDrop_);
-};
-goog.inherits(goog.events.FileDropHandler, goog.events.EventTarget);
-
-
-/**
- * Whether the drag event contains files. It is initialized only in the
- * dragenter event. It is used in all the drag events to prevent default actions
- * only if the drag contains files. Preventing default actions is necessary to
- * go from dragenter to dragover and from dragover to drop. However we do not
- * always want to prevent default actions, e.g. when the user drags text or
- * links on a text area we should not prevent the browser default action that
- * inserts the text in the text area. It is also necessary to stop propagation
- * when handling drag events on the element to prevent them from propagating
- * to the document.
- * @private
- * @type {boolean}
- */
-goog.events.FileDropHandler.prototype.dndContainsFiles_ = false;
-
-
-/**
- * A logger, used to help us debug the algorithm.
- * @type {goog.debug.Logger}
- * @private
- */
-goog.events.FileDropHandler.prototype.logger_ =
- goog.debug.Logger.getLogger('goog.events.FileDropHandler');
-
-
-/**
- * The types of events fired by this class.
- * @enum {string}
- */
-goog.events.FileDropHandler.EventType = {
- DROP: goog.events.EventType.DROP
-};
-
-
-/** @override */
-goog.events.FileDropHandler.prototype.disposeInternal = function() {
- goog.events.FileDropHandler.superClass_.disposeInternal.call(this);
- this.eventHandler_.dispose();
-};
-
-
-/**
- * Dispatches the DROP event.
- * @param {goog.events.BrowserEvent} e The underlying browser event.
- * @private
- */
-goog.events.FileDropHandler.prototype.dispatch_ = function(e) {
- this.logger_.fine('Firing DROP event...');
- var event = new goog.events.BrowserEvent(e.getBrowserEvent());
- event.type = goog.events.FileDropHandler.EventType.DROP;
- this.dispatchEvent(event);
-};
-
-
-/**
- * Handles dragenter on the document.
- * @param {goog.events.BrowserEvent} e The dragenter event.
- * @private
- */
-goog.events.FileDropHandler.prototype.onDocDragEnter_ = function(e) {
- this.logger_.finer('"' + e.target.id + '" (' + e.target + ') dispatched: ' +
- e.type);
- var dt = e.getBrowserEvent().dataTransfer;
- // Check whether the drag event contains files.
- this.dndContainsFiles_ = !!(dt &&
- ((dt.types &&
- (goog.array.contains(dt.types, 'Files') ||
- goog.array.contains(dt.types, 'public.file-url'))) ||
- (dt.files && dt.files.length > 0)));
- // If it does
- if (this.dndContainsFiles_) {
- // Prevent default actions.
- e.preventDefault();
- }
- this.logger_.finer('dndContainsFiles_: ' + this.dndContainsFiles_);
-};
-
-
-/**
- * Handles dragging something over the document.
- * @param {goog.events.BrowserEvent} e The dragover event.
- * @private
- */
-goog.events.FileDropHandler.prototype.onDocDragOver_ = function(e) {
- this.logger_.finest('"' + e.target.id + '" (' + e.target + ') dispatched: ' +
- e.type);
- if (this.dndContainsFiles_) {
- // Prevent default actions.
- e.preventDefault();
- // Disable the drop on the document outside the drop zone.
- var dt = e.getBrowserEvent().dataTransfer;
- dt.dropEffect = 'none';
- }
-};
-
-
-/**
- * Handles dragging something over the element (drop zone).
- * @param {goog.events.BrowserEvent} e The dragover event.
- * @private
- */
-goog.events.FileDropHandler.prototype.onElemDragOver_ = function(e) {
- this.logger_.finest('"' + e.target.id + '" (' + e.target + ') dispatched: ' +
- e.type);
- if (this.dndContainsFiles_) {
- // Prevent default actions and stop the event from propagating further to
- // the document. Both lines are needed! (See comment above).
- e.preventDefault();
- e.stopPropagation();
- // Allow the drop on the drop zone.
- var dt = e.getBrowserEvent().dataTransfer;
- dt.effectAllowed = 'all';
- dt.dropEffect = 'copy';
- }
-};
-
-
-/**
- * Handles dropping something onto the element (drop zone).
- * @param {goog.events.BrowserEvent} e The drop event.
- * @private
- */
-goog.events.FileDropHandler.prototype.onElemDrop_ = function(e) {
- this.logger_.finer('"' + e.target.id + '" (' + e.target + ') dispatched: ' +
- e.type);
- // If the drag and drop event contains files.
- if (this.dndContainsFiles_) {
- // Prevent default actions and stop the event from propagating further to
- // the document. Both lines are needed! (See comment above).
- e.preventDefault();
- e.stopPropagation();
- // Dispatch DROP event.
- this.dispatch_(e);
- }
-};