TiddlyWiki5/core/modules/utils/parsetree.js

80 wiersze
2.1 KiB
JavaScript

/*\
title: $:/core/modules/utils/parsetree.js
type: application/javascript
module-type: utils
Parse tree utility functions.
\*/
(function(){
/*jslint node: true, browser: true */
/*global $tw: false */
"use strict";
exports.addAttributeToParseTreeNode = function(node,name,value) {
node.attributes = node.attributes || {};
node.attributes[name] = {type: "string", value: value};
};
exports.getAttributeValueFromParseTreeNode = function(node,name,defaultValue) {
if(node.attributes && node.attributes[name] && node.attributes[name].value !== undefined) {
return node.attributes[name].value;
}
return defaultValue;
};
exports.addClassToParseTreeNode = function(node,classString) {
var classes = [];
node.attributes = node.attributes || {};
node.attributes["class"] = node.attributes["class"] || {type: "string", value: ""};
if(node.attributes["class"].type === "string") {
if(node.attributes["class"].value !== "") {
classes = node.attributes["class"].value.split(" ");
}
if(classString !== "") {
$tw.utils.pushTop(classes,classString.split(" "));
}
node.attributes["class"].value = classes.join(" ");
}
};
exports.addStyleToParseTreeNode = function(node,name,value) {
node.attributes = node.attributes || {};
node.attributes.style = node.attributes.style || {type: "string", value: ""};
if(node.attributes.style.type === "string") {
node.attributes.style.value += name + ":" + value + ";";
}
};
exports.findParseTreeNode = function(nodeArray,search) {
for(var t=0; t<nodeArray.length; t++) {
if(nodeArray[t].type === search.type && nodeArray[t].tag === search.tag) {
return nodeArray[t];
}
}
return undefined;
};
/*
Helper to get the text of a parse tree node or array of nodes
*/
exports.getParseTreeText = function getParseTreeText(tree) {
var output = [];
if($tw.utils.isArray(tree)) {
$tw.utils.each(tree,function(node) {
output.push(getParseTreeText(node));
});
} else {
if(tree.type === "text") {
output.push(tree.text);
}
if(tree.children) {
return getParseTreeText(tree.children);
}
}
return output.join("");
};
})();