137 lines
4.4 KiB
JavaScript
137 lines
4.4 KiB
JavaScript
/*\
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title: $:/core/modules/widgets/importvariables.js
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type: application/javascript
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module-type: widget
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Import variable definitions from other tiddlers
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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 ImportVariablesWidget = 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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ImportVariablesWidget.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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ImportVariablesWidget.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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ImportVariablesWidget.prototype.execute = function(tiddlerList) {
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var widgetPointer = this;
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// Got to flush all the accumulated variables
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this.variables = Object.create(null);
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if(this.parentWidget) {
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Object.setPrototypeOf(this.variables,this.parentWidget.variables);
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}
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// Get our parameters
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this.filter = this.getAttribute("filter");
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// Compute the filter
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this.tiddlerList = tiddlerList || this.wiki.filterTiddlers(this.filter,this);
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// Accumulate the <$set> widgets from each tiddler
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$tw.utils.each(this.tiddlerList,function(title) {
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var parser = widgetPointer.wiki.parseTiddler(title,{parseAsInline:true});
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if(parser) {
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var parseTreeNode = parser.tree[0];
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while(parseTreeNode && ["setvariable","set","parameters"].indexOf(parseTreeNode.type) !== -1) {
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var node = {
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type: "set",
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attributes: parseTreeNode.attributes,
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params: parseTreeNode.params,
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isMacroDefinition: parseTreeNode.isMacroDefinition,
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isFunctionDefinition: parseTreeNode.isFunctionDefinition,
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isProcedureDefinition: parseTreeNode.isProcedureDefinition,
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isWidgetDefinition: parseTreeNode.isWidgetDefinition,
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configTrimWhiteSpace: parseTreeNode.configTrimWhiteSpace
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};
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if(parseTreeNode.type === "set" || parseTreeNode.type === "setvariable") {
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if(parseTreeNode.isMacroDefinition || parseTreeNode.isProcedureDefinition || parseTreeNode.isWidgetDefinition || parseTreeNode.isFunctionDefinition) {
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// Macro definitions can be folded into
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// current widget instead of adding
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// another link to the chain.
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var widget = widgetPointer.makeChildWidget(node);
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widget.computeAttributes();
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widget.execute();
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// We SHALLOW copy over all variables
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// in widget. We can't use
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// $tw.utils.assign, because that copies
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// up the prototype chain, which we
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// don't want.
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$tw.utils.each(Object.keys(widget.variables), function(key) {
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widgetPointer.variables[key] = widget.variables[key];
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});
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} else {
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widgetPointer.children = [widgetPointer.makeChildWidget(node)];
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// No more regenerating children for
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// this widget. If it needs to refresh,
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// it'll do so along with the the whole
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// importvariable tree.
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if (widgetPointer != this) {
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widgetPointer.makeChildWidgets = function(){};
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}
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widgetPointer = widgetPointer.children[0];
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}
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}
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parseTreeNode = parseTreeNode.children && parseTreeNode.children[0];
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}
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}
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});
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if (widgetPointer != this) {
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widgetPointer.parseTreeNode.children = this.parseTreeNode.children;
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} else {
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widgetPointer.makeChildWidgets();
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}
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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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ImportVariablesWidget.prototype.refresh = function(changedTiddlers) {
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// Recompute our attributes and the filter list
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var changedAttributes = this.computeAttributes(),
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tiddlerList = this.wiki.filterTiddlers(this.getAttribute("filter"),this);
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// Refresh if the filter has changed, or the list of tiddlers has changed, or any of the tiddlers in the list has changed
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function haveListedTiddlersChanged() {
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var changed = false;
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tiddlerList.forEach(function(title) {
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if(changedTiddlers[title]) {
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changed = true;
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}
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});
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return changed;
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}
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if(changedAttributes.filter || !$tw.utils.isArrayEqual(this.tiddlerList,tiddlerList) || haveListedTiddlersChanged()) {
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// Compute the filter
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this.removeChildDomNodes();
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this.execute(tiddlerList);
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this.renderChildren(this.parentDomNode,this.findNextSiblingDomNode());
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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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exports.importvariables = ImportVariablesWidget;
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})();
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