mirror of
https://github.com/node-red/node-red.git
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110 lines
4.1 KiB
JavaScript
110 lines
4.1 KiB
JavaScript
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(function() {
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function indentLine(str,length) {
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if (length <= 0) {
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return str;
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}
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var i = (new Array(length)).join(" ");
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str = str.replace(/^\s*/,i);
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return str;
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}
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function formatExpression(str) {
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var length = str.length;
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var start = 0;
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var inString = false;
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var inBox = false;
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var quoteChar;
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var list = [];
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var stack = [];
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var frame;
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var v;
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var matchingBrackets = {
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"(":")",
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"[":"]",
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"{":"}"
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}
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for (var i=0;i<length;i++) {
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var c = str[i];
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if (!inString) {
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if (c === "'" || c === '"') {
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inString = true;
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quoteChar = c;
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frame = {type:"string",pos:i};
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list.push(frame);
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stack.push(frame);
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} else if (c === ";") {
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frame = {type:";",pos:i};
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list.push(frame);
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} else if (c === ",") {
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frame = {type:",",pos:i};
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list.push(frame);
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} else if (/[\(\[\{]/.test(c)) {
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frame = {type:"open-block",char:c,pos:i};
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list.push(frame);
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stack.push(frame);
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} else if (/[\}\)\]]/.test(c)) {
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var oldFrame = stack.pop();
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if (matchingBrackets[oldFrame.char] !== c) {
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//console.log("Stack frame mismatch",c,"at",i,"expected",matchingBrackets[oldFrame.char],"from",oldFrame.pos);
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return str;
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}
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//console.log("Closing",c,"at",i,"compare",oldFrame.type,oldFrame.pos);
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oldFrame.width = i-oldFrame.pos;
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frame = {type:"close-block",pos:i,char:c,width:oldFrame.width}
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list.push(frame);
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}
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} else {
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if (c === quoteChar) {
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// Next char must be a ]
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inString = false;
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stack.pop();
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}
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}
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}
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// console.log(stack);
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var result = str;
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var indent = 0;
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var offset = 0;
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var pre,post,indented;
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var longStack = [];
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list.forEach(function(f) {
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if (f.type === ";" || f.type === ",") {
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if (longStack[longStack.length-1]) {
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pre = result.substring(0,offset+f.pos+1);
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post = result.substring(offset+f.pos+1);
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indented = indentLine(post,indent);
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result = pre+"\n"+indented;
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offset += indented.length-post.length+1;
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}
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} else if (f.type === "open-block") {
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if (f.width > 30) {
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longStack.push(true);
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indent += 4;
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pre = result.substring(0,offset+f.pos+1);
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post = result.substring(offset+f.pos+1);
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indented = indentLine(post,indent);
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result = pre+"\n"+indented;
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offset += indented.length-post.length+1;
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} else {
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longStack.push(false);
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}
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} else if (f.type === "close-block") {
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if (f.width > 30) {
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indent -= 4;
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pre = result.substring(0,offset+f.pos);
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post = result.substring(offset+f.pos);
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indented = indentLine(post,indent);
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result = pre+"\n"+indented;
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offset += indented.length-post.length+1;
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}
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longStack.pop();
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}
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})
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//console.log(result);
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return result;
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}
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jsonata.format = formatExpression;
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jsonata.functions = ["$sum", "$count", "$max", "$min", "$average", "$string", "$substring", "$substringBefore", "$substringAfter", "$lowercase", "$uppercase", "$length", "$split", "$join", "$number", "$boolean", "$not", "$map", "$reduce", "$keys", "$lookup", "$append", "$exists", "$spread"]
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})();
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