mirror of
https://github.com/Jermolene/TiddlyWiki5
synced 2025-11-08 19:43:34 +00:00
Move the widgets back to the right folder
This commit is contained in:
Jeremy Ruston
184
core/modules/widgets/link.js
Executable file
184
core/modules/widgets/link.js
Executable file
@@ -0,0 +1,184 @@
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/*\
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title: $:/core/modules/new_widgets/link.js
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type: application/javascript
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module-type: new_widget
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Link 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/new_widgets/widget.js").widget;
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var LinkWidget = 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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LinkWidget.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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LinkWidget.prototype.render = function(parent,nextSibling) {
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// Save the parent dom node
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this.parentDomNode = parent;
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// Compute our attributes
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this.computeAttributes();
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// Execute our logic
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this.execute();
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// Get the value of the tw-wikilinks configuration macro
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var wikiLinksMacro = this.getVariable("tw-wikilinks"),
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useWikiLinks = wikiLinksMacro ? !(wikiLinksMacro.trim() === "no") : true;
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// Render the link if required
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if(useWikiLinks) {
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this.renderLink(parent,nextSibling);
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} else {
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// Just insert the link text
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var domNode = this.document.createElement("span");
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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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}
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};
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/*
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Render this widget into the DOM
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*/
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LinkWidget.prototype.renderLink = function(parent,nextSibling) {
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var self = this;
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// Create our element
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var domNode = this.document.createElement("a");
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// Assign classes
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$tw.utils.addClass(domNode,"tw-tiddlylink");
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if(this.isShadow) {
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$tw.utils.addClass(domNode,"tw-tiddlylink-shadow");
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}
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if(this.isMissing && !this.isShadow) {
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$tw.utils.addClass(domNode,"tw-tiddlylink-missing");
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} else {
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if(!this.isMissing) {
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$tw.utils.addClass(domNode,"tw-tiddlylink-resolves");
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}
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}
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// Set an href
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var wikiLinkTemplateMacro = this.getVariable("tw-wikilink-template"),
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wikiLinkTemplate = wikiLinkTemplateMacro ? wikiLinkTemplateMacro.trim() : "#$uri_encoded$",
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wikiLinkText = wikiLinkTemplate.replace("$uri_encoded$",encodeURIComponent(this.to));
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wikiLinkText = wikiLinkText.replace("$uri_doubleencoded$",encodeURIComponent(encodeURIComponent(this.to)));
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domNode.setAttribute("href",wikiLinkText);
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// Add a click event handler
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$tw.utils.addEventListeners(domNode,[
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{name: "click", handlerObject: this, handlerMethod: "handleClickEvent"},
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{name: "dragstart", handlerObject: this, handlerMethod: "handleDragStartEvent"},
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{name: "dragend", handlerObject: this, handlerMethod: "handleDragEndEvent"}
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]);
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// Insert the link into the DOM and render any children
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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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};
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LinkWidget.prototype.handleClickEvent = function (event) {
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// Send the click on it's way as a navigate event
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var bounds = this.domNodes[0].getBoundingClientRect();
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this.dispatchEvent({
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type: "tw-navigate",
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navigateTo: this.to,
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navigateFromTitle: this.getVariable("currentTiddler"),
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navigateFromNode: this,
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navigateFromClientRect: { top: bounds.top, left: bounds.left, width: bounds.width, right: bounds.right, bottom: bounds.bottom, height: bounds.height
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}
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});
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event.preventDefault();
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event.stopPropagation();
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return false;
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};
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LinkWidget.prototype.handleDragStartEvent = function(event) {
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if(this.to) {
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// Set the dragging class on the element being dragged
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$tw.utils.addClass(event.target,"tw-tiddlylink-dragging");
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// Create the drag image elements
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this.dragImage = this.document.createElement("div");
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this.dragImage.className = "tw-tiddler-dragger";
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var inner = this.document.createElement("div");
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inner.className = "tw-tiddler-dragger-inner";
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inner.appendChild(this.document.createTextNode(this.to));
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this.dragImage.appendChild(inner);
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this.document.body.appendChild(this.dragImage);
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// Astoundingly, we need to cover the dragger up: http://www.kryogenix.org/code/browser/custom-drag-image.html
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var bounds = this.dragImage.firstChild.getBoundingClientRect(),
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cover = this.document.createElement("div");
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cover.className = "tw-tiddler-dragger-cover";
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cover.style.left = (bounds.left - 16) + "px";
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cover.style.top = (bounds.top - 16) + "px";
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cover.style.width = (bounds.width + 32) + "px";
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cover.style.height = (bounds.height + 32) + "px";
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this.dragImage.appendChild(cover);
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// Set the data transfer properties
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var dataTransfer = event.dataTransfer;
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dataTransfer.effectAllowed = "copy";
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dataTransfer.setDragImage(this.dragImage.firstChild,-16,-16);
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dataTransfer.clearData();
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dataTransfer.setData("text/vnd.tiddler",this.wiki.getTiddlerAsJson(this.to));
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dataTransfer.setData("text/plain",this.wiki.getTiddlerText(this.to,""));
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event.stopPropagation();
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} else {
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event.preventDefault();
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}
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};
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LinkWidget.prototype.handleDragEndEvent = function(event) {
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// Remove the dragging class on the element being dragged
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$tw.utils.removeClass(event.target,"tw-tiddlylink-dragging");
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// Delete the drag image element
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if(this.dragImage) {
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this.dragImage.parentNode.removeChild(this.dragImage);
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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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LinkWidget.prototype.execute = function() {
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// Get the target tiddler title
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this.to = this.getAttribute("to",this.getVariable("currentTiddler"));
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// Determine the link characteristics
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this.isMissing = !this.wiki.tiddlerExists(this.to);
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this.isShadow = this.wiki.isShadowTiddler(this.to);
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// Make the 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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LinkWidget.prototype.refresh = function(changedTiddlers) {
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var changedAttributes = this.computeAttributes();
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if(changedAttributes.to || changedTiddlers[this.to]) {
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this.refreshSelf();
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return true;
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}
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return this.refreshChildren(changedTiddlers);
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};
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/*
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Remove any DOM nodes created by this widget or its children
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*/
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LinkWidget.prototype.removeChildDomNodes = function() {
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$tw.utils.each(this.domNodes,function(domNode) {
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domNode.parentNode.removeChild(domNode);
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});
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this.domNodes = [];
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};
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exports.link = LinkWidget;
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})();
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