OcttKB Cross-Repo Sync (HTML to Raw)

Wiki-OcttKB/tiddlers/System/$__ThirdParty_tobibeer_calc.js

@@ -0,0 +1,123 @@
+/*\
+title: $:/.tb/macros/calc
+type: application/javascript
+module-type: macro
+
+Computes a (Field) value +,-,*,/ a provided value.
+
+\*/
+(function(){
+
+/*jslint node: true, browser: true */
+/*global $tw: false */
+"use strict";
+
+/*
+Information about this macro
+*/
+
+exports.name = "calc";
+
+exports.params = [
+	{name: "value"},
+	{name: "operation"},
+	{name: "until"},
+	{name: "beyond"},
+	{name: "decimals"},
+	{name: "tiddler"},
+	{name: "by"}
+];
+
+/*
+Run the macro
+*/
+exports.run = function(value, operation, until, beyond, decimals, tiddler, by) {
+	if(!value) {
+		return;
+	}
+	if("" === operation){
+		operation = "+";
+	}
+	var
+		curr,dec,init,initMatch,op,opGiven,r,result,val,
+		regInit = /^((?:[0-9]+)|(?:(?:[0-9]*)[\.,\,](?:[0-9]*))){1}[=][>](.*)/mg,
+		ops = ["+","-","*","/"];
+	initMatch = regInit.exec(value);
+	if(initMatch) {
+		init = initMatch[1].replace(/[\,]/,".");
+		value = initMatch[2];
+	}
+	curr = parseFloat(
+		isNaN(parseFloat(value)) ?
+		this.wiki.getTextReference(value, init || "NaN", tiddler || this.getVariable("currentTiddler")) :
+		value
+	);
+	until = parseFloat(until);
+	decimals = parseInt(decimals);
+
+	op = operation.charAt(0);
+	opGiven = ops.indexOf(op) >= 0;
+	if(!opGiven) {
+		op = "+";
+	}
+	initMatch = regInit.exec(by);
+	if(initMatch) {
+		init = initMatch[1].replace(/[\,]/,".");
+		by = initMatch[2];
+	}
+	val = parseFloat(
+		isNaN(parseFloat(by)) ?
+		this.wiki.getTextReference(by, init || "NaN", tiddler || this.getVariable("currentTiddler")) :
+		by
+	);
+	if(by === "") {
+		val = opGiven ?
+			(operation.length < 2 ? 0 : parseFloat(operation.substr(1))) :
+			parseFloat(operation);
+	}
+	if(isNaN(curr)) {
+		result = "NaN";
+	} else {
+		switch (op){
+			case "-": result = curr - val; break;
+			case "*": result = curr * val; break;
+			case "/": result = curr / val; break;
+			case "+":
+				/* falls through */
+			default: result = curr + val;
+		}
+		if(!isNaN(until)) {
+			if (!(
+				"+" == op || "*" == op ?
+				result <= until :
+				result >= until
+			)) {
+				if("true" == beyond) {
+					result = true;
+				} else {
+					result = until;
+				}
+			}
+			if(beyond && result !== true) {
+				result = false;
+			}
+		}
+	}
+
+	if(!isNaN(result)){
+		r = result.toString();
+		dec = r.indexOf('.');
+		if(dec > -1){
+			dec = r.substr(dec).length;
+			if(
+				!isNaN(decimals) && dec > decimals ||
+				isNaN(decimals) && dec > 2
+			){
+				result = result.toFixed(isNaN(decimals) ? 2 : decimals);
+			}
+		}
+	}
+	return result.toString();
+};
+
+})();