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TiddlyWiki5/core/modules/rendertree/wikirendertree.js

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/*\
title: $:/core/modules/rendertree/wikirendertree.js
type: application/javascript
module-type: global
Wiki text render tree
\*/
(function(){
/*jslint node: true, browser: true */
/*global $tw: false */
"use strict";
/*
Create a render tree object for a parse tree
*/
var WikiRenderTree = function(parser,options) {
this.parser = parser;
this.wiki = options.wiki;
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// Hashmap of the renderer classes
if(!this.rendererClasses) {
WikiRenderTree.prototype.rendererClasses = $tw.modules.applyMethods("wikirenderer");
}
};
/*
Generate the full render tree for this parse tree
renderContext: see below
An renderContext consists of these fields:
tiddlerTitle: title of the tiddler providing the context
parentContext: reference back to previous context in the stack
*/
WikiRenderTree.prototype.execute = function(renderContext) {
renderContext = renderContext || {};
this.rendererTree = this.createRenderers(renderContext,this.parser.tree);
};
/*
Create an array of renderers for an array of parse tree nodes
*/
WikiRenderTree.prototype.createRenderers = function(renderContext,parseTreeNodes) {
var rendererNodes = [];
if(parseTreeNodes) {
for(var t=0; t<parseTreeNodes.length; t++) {
rendererNodes.push(this.createRenderer(renderContext,parseTreeNodes[t]));
}
}
return rendererNodes;
};
/*
Create a renderer node for a parse tree node
*/
WikiRenderTree.prototype.createRenderer = function(renderContext,parseTreeNode) {
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var RenderNodeClass = this.rendererClasses[parseTreeNode.type];
return new RenderNodeClass(this,renderContext,parseTreeNode);
};
/*
Render as a string
*/
WikiRenderTree.prototype.render = function(type) {
var output = [];
$tw.utils.each(this.rendererTree,function(node) {
if(node.render) {
output.push(node.render(type));
}
});
return output.join("");
};
/*
Render to the DOM
*/
WikiRenderTree.prototype.renderInDom = function(container) {
this.container = container;
$tw.utils.each(this.rendererTree,function(node) {
if(node.renderInDom) {
container.appendChild(node.renderInDom());
}
});
};
/*
Update the DOM rendering in the light of a set of changes
*/
WikiRenderTree.prototype.refreshInDom = function(changes) {
$tw.utils.each(this.rendererTree,function(node) {
if(node.refreshInDom) {
node.refreshInDom(changes);
}
});
};
exports.WikiRenderTree = WikiRenderTree;
})();