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https://github.com/Jermolene/TiddlyWiki5
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95ef1c4580
Using action-navigate within the “actions” attribute of the linkcatcher widget would otherwise trigger the navigation handler recursively.
107 lines
2.9 KiB
JavaScript
107 lines
2.9 KiB
JavaScript
/*\
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title: $:/core/modules/widgets/linkcatcher.js
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type: application/javascript
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module-type: widget
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Linkcatcher 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 LinkCatcherWidget = function(parseTreeNode,options) {
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this.initialise(parseTreeNode,options);
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this.addEventListeners([
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{type: "tm-navigate", handler: "handleNavigateEvent"}
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]);
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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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LinkCatcherWidget.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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LinkCatcherWidget.prototype.render = function(parent,nextSibling) {
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this.parentDomNode = parent;
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this.computeAttributes();
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this.execute();
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this.renderChildren(parent,nextSibling);
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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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LinkCatcherWidget.prototype.execute = function() {
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// Get our parameters
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this.catchTo = this.getAttribute("to");
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this.catchMessage = this.getAttribute("message");
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this.catchSet = this.getAttribute("set");
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this.catchSetTo = this.getAttribute("setTo");
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this.catchActions = this.getAttribute("actions");
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// Construct the child widgets
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this.makeChildWidgets();
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// When executing actions we avoid trapping navigate events, so that we don't trigger ourselves recursively
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this.executingActions = false;
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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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LinkCatcherWidget.prototype.refresh = function(changedTiddlers) {
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var changedAttributes = this.computeAttributes();
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if(changedAttributes.to || changedAttributes.message || changedAttributes.set || changedAttributes.setTo) {
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this.refreshSelf();
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return true;
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} else {
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return this.refreshChildren(changedTiddlers);
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}
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};
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/*
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Handle a tm-navigate event
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*/
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LinkCatcherWidget.prototype.handleNavigateEvent = function(event) {
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if(!this.executingActions) {
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// Execute the actions
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if(this.catchTo) {
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this.wiki.setTextReference(this.catchTo,event.navigateTo,this.getVariable("currentTiddler"));
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}
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if(this.catchMessage && this.parentWidget) {
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this.parentWidget.dispatchEvent({
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type: this.catchMessage,
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param: event.navigateTo,
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navigateTo: event.navigateTo
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});
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}
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if(this.catchSet) {
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var tiddler = this.wiki.getTiddler(this.catchSet);
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this.wiki.addTiddler(new $tw.Tiddler(tiddler,{title: this.catchSet, text: this.catchSetTo}));
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}
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if(this.catchActions) {
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this.executingActions = true;
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this.invokeActionString(this.catchActions,this,event,{navigateTo: event.navigateTo});
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this.executingActions = false;
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}
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} else {
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// This is a navigate event generated by the actions of this linkcatcher, so we don't trap it again, but just pass it to the parent
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this.parentWidget.dispatchEvent({
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type: "tm-navigate",
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param: event.navigateTo,
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navigateTo: event.navigateTo
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});
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}
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return false;
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};
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exports.linkcatcher = LinkCatcherWidget;
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})();
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