142 lines
3.6 KiB
JavaScript
142 lines
3.6 KiB
JavaScript
/*\
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title: $:/core/modules/utils/parsetree.js
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type: application/javascript
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module-type: utils
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Parse tree utility functions.
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\*/
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(function(){
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/*jslint node: true, browser: true */
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/*global $tw: false */
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"use strict";
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/*
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Add attribute to parse tree node
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Can be invoked as (node,name,value) or (node,attr)
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*/
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exports.addAttributeToParseTreeNode = function(node,name,value) {
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var attribute = typeof name === "object" ? name : {name: name, type: "string", value: value};
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name = attribute.name;
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node.attributes = node.attributes || {};
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node.orderedAttributes = node.orderedAttributes || [];
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node.attributes[name] = attribute;
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var foundIndex = -1;
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$tw.utils.each(node.orderedAttributes,function(attr,index) {
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if(attr.name === name) {
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foundIndex = index;
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}
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});
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if(foundIndex === -1) {
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node.orderedAttributes.push(attribute);
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} else {
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node.orderedAttributes[foundIndex] = attribute;
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}
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};
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exports.getOrderedAttributesFromParseTreeNode = function(node) {
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if(node.orderedAttributes) {
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return node.orderedAttributes;
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} else {
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var attributes = [];
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$tw.utils.each(node.attributes,function(attribute) {
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attributes.push(attribute);
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});
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return attributes.sort(function(a,b) {
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return a.name < b.name ? -1 : (a.name > b.name ? 1 : 0);
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});
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}
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};
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exports.getAttributeValueFromParseTreeNode = function(node,name,defaultValue) {
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if(node.attributes && node.attributes[name] && node.attributes[name].value !== undefined) {
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return node.attributes[name].value;
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}
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return defaultValue;
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};
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exports.addClassToParseTreeNode = function(node,classString) {
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var classes = [],
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attribute;
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node.attributes = node.attributes || {};
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attribute = node.attributes["class"];
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if(!attribute) {
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// If the class attribute does not exist, we must create it first.
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attribute = {name: "class", type: "string", value: ""};
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node.attributes["class"] = attribute;
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node.orderedAttributes = node.orderedAttributes || [];
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node.orderedAttributes.push(attribute);
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}
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if(attribute.type === "string") {
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if(attribute.value !== "") {
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classes = attribute.value.split(" ");
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}
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if(classString !== "") {
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$tw.utils.pushTop(classes,classString.split(" "));
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}
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attribute.value = classes.join(" ");
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}
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};
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exports.addStyleToParseTreeNode = function(node,name,value) {
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var attribute;
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node.attributes = node.attributes || {};
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attribute = node.attributes.style;
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if(!attribute) {
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attribute = {name: "style", type: "string", value: ""};
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node.attributes.style = attribute;
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node.orderedAttributes = node.orderedAttributes || [];
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node.orderedAttributes.push(attribute);
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}
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if(attribute.type === "string") {
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attribute.value += name + ":" + value + ";";
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}
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};
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exports.findParseTreeNode = function(nodeArray,search) {
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for(var t=0; t<nodeArray.length; t++) {
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if(nodeArray[t].type === search.type && nodeArray[t].tag === search.tag) {
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return nodeArray[t];
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}
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}
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return undefined;
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};
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exports.findChildNodeInTree = function(root,searchFn) {
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if(searchFn(root)) {
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return root;
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}
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if(root.children && root.children.length > 0) {
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for(var i=0; i<root.children.length; i++) {
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var result = exports.findChildNodeInTree(root.children[i], searchFn);
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if(result) {
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return result;
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}
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}
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}
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return undefined;
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};
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/*
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Helper to get the text of a parse tree node or array of nodes
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*/
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exports.getParseTreeText = function getParseTreeText(tree) {
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var output = [];
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if($tw.utils.isArray(tree)) {
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$tw.utils.each(tree,function(node) {
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output.push(getParseTreeText(node));
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});
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} else {
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if(tree.type === "text") {
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output.push(tree.text);
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}
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if(tree.children) {
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return getParseTreeText(tree.children);
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}
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}
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return output.join("");
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};
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})();
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