mirror of
https://github.com/Jermolene/TiddlyWiki5
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114 lines
3.5 KiB
JavaScript
114 lines
3.5 KiB
JavaScript
/*\
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title: $:/core/modules/rendertree/renderers/macrocall.js
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type: application/javascript
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module-type: wikirenderer
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Macro call renderer
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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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/*
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Macro call renderer
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*/
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var MacroCallRenderer = function(renderTree,renderContext,parseTreeNode) {
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// Store state information
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this.renderTree = renderTree;
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this.renderContext = renderContext;
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this.parseTreeNode = parseTreeNode;
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// Find the macro definition
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var macro = this.findMacroDefinition(this.parseTreeNode.name);
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// Insert an error message if we couldn't find the macro
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var childTree;
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if(!macro) {
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childTree = [{type: "text", text: "<<Undefined macro: " + this.parseTreeNode.name + ">>"}];
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} else {
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// Substitute the macro parameters
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var text = this.substituteParameters(macro.text,this.parseTreeNode,macro);
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// Parse the text
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childTree = this.renderTree.wiki.parseText("text/vnd.tiddlywiki",text,{parseAsInline: !this.parseTreeNode.isBlock}).tree;
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}
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// Create the renderers for the child nodes
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this.children = this.renderTree.createRenderers(this.renderContext,childTree);
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};
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/*
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Find a named macro definition
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*/
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MacroCallRenderer.prototype.findMacroDefinition = function(name) {
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var context = this.renderContext;
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while(context) {
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if(context.macroDefinitions && context.macroDefinitions[name]) {
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return context.macroDefinitions[name];
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}
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context = context.parentContext;
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}
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return undefined;
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};
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/*
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Expand the parameters in a block of text
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*/
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MacroCallRenderer.prototype.substituteParameters = function(text,macroCallParseTreeNode,macroDefinition) {
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var nextAnonParameter = 0; // Next candidate anonymous parameter in macro call
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// Step through each of the parameters in the macro definition
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for(var p=0; p<macroDefinition.params.length; p++) {
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// Check if we've got a macro call parameter with the same name
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var paramInfo = macroDefinition.params[p],
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paramValue = undefined;
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for(var m=0; m<macroCallParseTreeNode.params.length; m++) {
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if(macroCallParseTreeNode.params[m].name === paramInfo.name) {
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paramValue = macroCallParseTreeNode.params[m].value;
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}
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}
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// If not, use the next available anonymous macro call parameter
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if(!paramValue && macroCallParseTreeNode.params.length > 0) {
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while(macroCallParseTreeNode.params[nextAnonParameter].name && nextAnonParameter < macroCallParseTreeNode.params.length-1) {
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nextAnonParameter++;
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}
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if(!macroCallParseTreeNode.params[nextAnonParameter].name) {
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paramValue = macroCallParseTreeNode.params[nextAnonParameter].value;
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nextAnonParameter++;
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}
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}
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// If we've still not got a value, use the default, if any
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paramValue = paramValue || paramInfo["default"] || "";
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// Replace any instances of this parameter
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text = text.replace(new RegExp("\\$" + $tw.utils.escapeRegExp(paramInfo.name) + "\\$","mg"),paramValue);
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}
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return text;
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};
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MacroCallRenderer.prototype.render = function(type) {
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var output = [];
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$tw.utils.each(this.children,function(node) {
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if(node.render) {
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output.push(node.render(type));
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}
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});
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return output.join("");
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};
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MacroCallRenderer.prototype.renderInDom = function() {
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// Create the element
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this.domNode = document.createElement(this.parseTreeNode.isBlock ? "div" : "span");
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this.domNode.setAttribute("data-macro-name",this.parseTreeNode.name);
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// Render any child nodes
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var self = this;
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$tw.utils.each(this.children,function(node,index) {
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if(node.renderInDom) {
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self.domNode.appendChild(node.renderInDom());
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}
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});
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// Return the dom node
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return this.domNode;
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};
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exports.macrocall = MacroCallRenderer
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})();
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