mirror of
https://github.com/Jermolene/TiddlyWiki5
synced 2024-12-25 01:20:30 +00:00
16bb474fef
in my tests listening for the dragend event and removing the tc-dragover class in that case removes the `tc-dragover` every time it should ... without this, firefox often doesn't remove it and the green bar sticks at the top investigating now if the droppable widget has a similar problem
206 lines
6.1 KiB
JavaScript
206 lines
6.1 KiB
JavaScript
/*\
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title: $:/core/modules/widgets/dropzone.js
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type: application/javascript
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module-type: widget
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Dropzone widget
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\*/
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(function(){
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/*jslint node: true, browser: true */
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/*global $tw: false */
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"use strict";
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var Widget = require("$:/core/modules/widgets/widget.js").widget;
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var DropZoneWidget = function(parseTreeNode,options) {
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this.initialise(parseTreeNode,options);
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};
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/*
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Inherit from the base widget class
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*/
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DropZoneWidget.prototype = new Widget();
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/*
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Render this widget into the DOM
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*/
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DropZoneWidget.prototype.render = function(parent,nextSibling) {
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var self = this;
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// Remember parent
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this.parentDomNode = parent;
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// Compute attributes and execute state
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this.computeAttributes();
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this.execute();
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// Create element
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var domNode = this.document.createElement("div");
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domNode.className = "tc-dropzone";
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// Add event handlers
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$tw.utils.addEventListeners(domNode,[
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{name: "dragenter", handlerObject: this, handlerMethod: "handleDragEnterEvent"},
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{name: "dragover", handlerObject: this, handlerMethod: "handleDragOverEvent"},
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{name: "dragleave", handlerObject: this, handlerMethod: "handleDragLeaveEvent"},
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{name: "drop", handlerObject: this, handlerMethod: "handleDropEvent"},
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{name: "paste", handlerObject: this, handlerMethod: "handlePasteEvent"},
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{name: "dragend", handlerObject: this, handlerMethod: "handleDragEndEvent"}
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]);
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domNode.addEventListener("click",function (event) {
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},false);
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// Insert element
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parent.insertBefore(domNode,nextSibling);
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this.renderChildren(domNode,null);
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this.domNodes.push(domNode);
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// Stack of outstanding enter/leave events
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this.currentlyEntered = [];
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};
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DropZoneWidget.prototype.enterDrag = function(event) {
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if(this.currentlyEntered.indexOf(event.target) === -1) {
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this.currentlyEntered.push(event.target);
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}
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// If we're entering for the first time we need to apply highlighting
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$tw.utils.addClass(this.domNodes[0],"tc-dragover");
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};
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DropZoneWidget.prototype.leaveDrag = function(event) {
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var pos = this.currentlyEntered.indexOf(event.target);
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if(pos !== -1) {
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this.currentlyEntered.splice(pos,1);
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}
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// Remove highlighting if we're leaving externally
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if(this.currentlyEntered.length === 0) {
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$tw.utils.removeClass(this.domNodes[0],"tc-dragover");
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}
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};
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DropZoneWidget.prototype.handleDragEnterEvent = function(event) {
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// Check for this window being the source of the drag
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if($tw.dragInProgress) {
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return false;
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}
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this.enterDrag(event);
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// Tell the browser that we're ready to handle the drop
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event.preventDefault();
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// Tell the browser not to ripple the drag up to any parent drop handlers
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event.stopPropagation();
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};
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DropZoneWidget.prototype.handleDragOverEvent = function(event) {
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// Check for being over a TEXTAREA or INPUT
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if(["TEXTAREA","INPUT"].indexOf(event.target.tagName) !== -1) {
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return false;
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}
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// Check for this window being the source of the drag
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if($tw.dragInProgress) {
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return false;
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}
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// Tell the browser that we're still interested in the drop
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event.preventDefault();
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event.dataTransfer.dropEffect = "copy"; // Explicitly show this is a copy
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};
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DropZoneWidget.prototype.handleDragLeaveEvent = function(event) {
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this.leaveDrag(event);
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};
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DropZoneWidget.prototype.handleDragEndEvent = function(event) {
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$tw.utils.removeClass(this.domNodes[0],"tc-dragover");
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};
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DropZoneWidget.prototype.handleDropEvent = function(event) {
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var self = this,
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readFileCallback = function(tiddlerFieldsArray) {
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self.dispatchEvent({type: "tm-import-tiddlers", param: JSON.stringify(tiddlerFieldsArray)});
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};
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this.leaveDrag(event);
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// Check for being over a TEXTAREA or INPUT
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if(["TEXTAREA","INPUT"].indexOf(event.target.tagName) !== -1) {
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return false;
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}
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// Check for this window being the source of the drag
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if($tw.dragInProgress) {
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return false;
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}
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var self = this,
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dataTransfer = event.dataTransfer;
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// Remove highlighting
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$tw.utils.removeClass(this.domNodes[0],"tc-dragover");
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// Import any files in the drop
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var numFiles = 0;
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if(dataTransfer.files) {
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numFiles = this.wiki.readFiles(dataTransfer.files,{
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callback: readFileCallback,
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deserializer: this.dropzoneDeserializer
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});
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}
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// Try to import the various data types we understand
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if(numFiles === 0) {
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$tw.utils.importDataTransfer(dataTransfer,this.wiki.generateNewTitle("Untitled"),readFileCallback);
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}
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// Tell the browser that we handled the drop
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event.preventDefault();
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// Stop the drop ripple up to any parent handlers
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event.stopPropagation();
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};
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DropZoneWidget.prototype.handlePasteEvent = function(event) {
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var self = this,
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readFileCallback = function(tiddlerFieldsArray) {
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self.dispatchEvent({type: "tm-import-tiddlers", param: JSON.stringify(tiddlerFieldsArray)});
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};
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// Let the browser handle it if we're in a textarea or input box
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if(["TEXTAREA","INPUT"].indexOf(event.target.tagName) == -1 && !event.target.isContentEditable) {
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var self = this,
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items = event.clipboardData.items;
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// Enumerate the clipboard items
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for(var t = 0; t<items.length; t++) {
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var item = items[t];
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if(item.kind === "file") {
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// Import any files
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this.wiki.readFile(item.getAsFile(),{
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callback: readFileCallback,
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deserializer: this.dropzoneDeserializer
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});
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} else if(item.kind === "string") {
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// Create tiddlers from string items
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var type = item.type;
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item.getAsString(function(str) {
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var tiddlerFields = {
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title: self.wiki.generateNewTitle("Untitled"),
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text: str,
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type: type
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};
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if($tw.log.IMPORT) {
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console.log("Importing string '" + str + "', type: '" + type + "'");
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}
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self.dispatchEvent({type: "tm-import-tiddlers", param: JSON.stringify([tiddlerFields])});
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});
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}
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}
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// Tell the browser that we've handled the paste
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event.stopPropagation();
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event.preventDefault();
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}
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};
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/*
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Compute the internal state of the widget
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*/
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DropZoneWidget.prototype.execute = function() {
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this.dropzoneDeserializer = this.getAttribute("deserializer");
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// Make child widgets
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this.makeChildWidgets();
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};
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/*
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Selectively refreshes the widget if needed. Returns true if the widget or any of its children needed re-rendering
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*/
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DropZoneWidget.prototype.refresh = function(changedTiddlers) {
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return this.refreshChildren(changedTiddlers);
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};
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exports.dropzone = DropZoneWidget;
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})();
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