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- goog.provide('goog.events.FileDropHandler');
- goog.provide('goog.events.FileDropHandler.EventType');
- goog.require('goog.array');
- goog.require('goog.dom');
- goog.require('goog.events.BrowserEvent');
- goog.require('goog.events.EventHandler');
- goog.require('goog.events.EventTarget');
- goog.require('goog.events.EventType');
- goog.require('goog.log');
- goog.require('goog.log.Level');
- goog.events.FileDropHandler = function(element, opt_preventDropOutside) {
- goog.events.EventTarget.call(this);
-
- this.eventHandler_ = new goog.events.EventHandler(this);
- var doc = element;
- if (opt_preventDropOutside) {
- doc = goog.dom.getOwnerDocument(element);
- }
-
- this.eventHandler_.listen(
- doc, goog.events.EventType.DRAGENTER, this.onDocDragEnter_);
-
-
- if (doc != element) {
- this.eventHandler_.listen(
- doc, goog.events.EventType.DRAGOVER, this.onDocDragOver_);
- }
-
- 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);
- goog.events.FileDropHandler.prototype.dndContainsFiles_ = false;
- goog.events.FileDropHandler.prototype.logger_ =
- goog.log.getLogger('goog.events.FileDropHandler');
- goog.events.FileDropHandler.EventType = {
- DROP: goog.events.EventType.DROP
- };
- goog.events.FileDropHandler.prototype.disposeInternal = function() {
- goog.events.FileDropHandler.superClass_.disposeInternal.call(this);
- this.eventHandler_.dispose();
- };
- goog.events.FileDropHandler.prototype.dispatch_ = function(e) {
- goog.log.fine(this.logger_, 'Firing DROP event...');
- var event = new goog.events.BrowserEvent(e.getBrowserEvent());
- event.type = goog.events.FileDropHandler.EventType.DROP;
- this.dispatchEvent(event);
- };
- goog.events.FileDropHandler.prototype.onDocDragEnter_ = function(e) {
- goog.log.log(
- this.logger_, goog.log.Level.FINER,
- '"' + e.target.id + '" (' + e.target + ') dispatched: ' + e.type);
- var dt = e.getBrowserEvent().dataTransfer;
-
- 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 (this.dndContainsFiles_) {
-
- e.preventDefault();
- }
- goog.log.log(
- this.logger_, goog.log.Level.FINER,
- 'dndContainsFiles_: ' + this.dndContainsFiles_);
- };
- goog.events.FileDropHandler.prototype.onDocDragOver_ = function(e) {
- goog.log.log(
- this.logger_, goog.log.Level.FINEST,
- '"' + e.target.id + '" (' + e.target + ') dispatched: ' + e.type);
- if (this.dndContainsFiles_) {
-
- e.preventDefault();
-
- var dt = e.getBrowserEvent().dataTransfer;
- dt.dropEffect = 'none';
- }
- };
- goog.events.FileDropHandler.prototype.onElemDragOver_ = function(e) {
- goog.log.log(
- this.logger_, goog.log.Level.FINEST,
- '"' + e.target.id + '" (' + e.target + ') dispatched: ' + e.type);
- if (this.dndContainsFiles_) {
-
-
- e.preventDefault();
- e.stopPropagation();
-
- var dt = e.getBrowserEvent().dataTransfer;
-
-
-
- try {
- dt.effectAllowed = 'all';
- } catch (err) {
- }
- dt.dropEffect = 'copy';
- }
- };
- goog.events.FileDropHandler.prototype.onElemDrop_ = function(e) {
- goog.log.log(
- this.logger_, goog.log.Level.FINER,
- '"' + e.target.id + '" (' + e.target + ') dispatched: ' + e.type);
-
- if (this.dndContainsFiles_) {
-
-
- e.preventDefault();
- e.stopPropagation();
-
- this.dispatch_(e);
- }
- };
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