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Create sprintf.js
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‎jspdf/libs/sprintf.js‎

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function sprintf( ) {
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// Return a formatted string
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//
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// version: 903.3016
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// discuss at: http://phpjs.org/functions/sprintf
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// + original by: Ash Searle (http://hexmen.com/blog/)
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// + namespaced by: Michael White (http://getsprink.com)
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// + tweaked by: Jack
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// + improved by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
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// + input by: Paulo Ricardo F. Santos
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// + improved by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
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// + input by: Brett Zamir (http://brettz9.blogspot.com)
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// + improved by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
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// * example 1: sprintf("%01.2f", 123.1);
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// * returns 1: 123.10
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// * example 2: sprintf("[%10s]", 'monkey');
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// * returns 2: '[ monkey]'
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// * example 3: sprintf("[%'#10s]", 'monkey');
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// * returns 3: '[####monkey]'
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var regex = /%%|%(\d+\$)?([-+\'#0 ]*)(\*\d+\$|\*|\d+)?(\.(\*\d+\$|\*|\d+))?([scboxXuidfegEG])/g;
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var a = arguments, i = 0, format = a[i++];
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// pad()
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var pad = function(str, len, chr, leftJustify) {
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if (!chr) chr = ' ';
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var padding = (str.length >= len) ? '' : Array(1 + len - str.length >>> 0).join(chr);
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return leftJustify ? str + padding : padding + str;
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};
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// justify()
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var justify = function(value, prefix, leftJustify, minWidth, zeroPad, customPadChar) {
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var diff = minWidth - value.length;
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if (diff > 0) {
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if (leftJustify || !zeroPad) {
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value = pad(value, minWidth, customPadChar, leftJustify);
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} else {
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value = value.slice(0, prefix.length) + pad('', diff, '0', true) + value.slice(prefix.length);
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}
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}
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return value;
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};
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// formatBaseX()
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var formatBaseX = function(value, base, prefix, leftJustify, minWidth, precision, zeroPad) {
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// Note: casts negative numbers to positive ones
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var number = value >>> 0;
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prefix = prefix && number && {'2': '0b', '8': '0', '16': '0x'}[base] || '';
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value = prefix + pad(number.toString(base), precision || 0, '0', false);
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return justify(value, prefix, leftJustify, minWidth, zeroPad);
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};
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// formatString()
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var formatString = function(value, leftJustify, minWidth, precision, zeroPad, customPadChar) {
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if (precision != null) {
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value = value.slice(0, precision);
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}
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return justify(value, '', leftJustify, minWidth, zeroPad, customPadChar);
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};
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// doFormat()
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var doFormat = function(substring, valueIndex, flags, minWidth, _, precision, type) {
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var number;
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var prefix;
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var method;
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var textTransform;
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var value;
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if (substring == '%%') return '%';
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// parse flags
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var leftJustify = false, positivePrefix = '', zeroPad = false, prefixBaseX = false, customPadChar = ' ';
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var flagsl = flags.length;
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for (var j = 0; flags && j < flagsl; j++) switch (flags.charAt(j)) {
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case ' ': positivePrefix = ' '; break;
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case '+': positivePrefix = '+'; break;
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case '-': leftJustify = true; break;
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case "'": customPadChar = flags.charAt(j+1); break;
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case '0': zeroPad = true; break;
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case '#': prefixBaseX = true; break;
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}
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// parameters may be null, undefined, empty-string or real valued
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// we want to ignore null, undefined and empty-string values
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if (!minWidth) {
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minWidth = 0;
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} else if (minWidth == '*') {
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minWidth = +a[i++];
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} else if (minWidth.charAt(0) == '*') {
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minWidth = +a[minWidth.slice(1, -1)];
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} else {
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minWidth = +minWidth;
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}
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// Note: undocumented perl feature:
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if (minWidth < 0) {
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minWidth = -minWidth;
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leftJustify = true;
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}
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if (!isFinite(minWidth)) {
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throw new Error('sprintf: (minimum-)width must be finite');
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}
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if (!precision) {
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precision = 'fFeE'.indexOf(type) > -1 ? 6 : (type == 'd') ? 0 : void(0);
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} else if (precision == '*') {
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precision = +a[i++];
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} else if (precision.charAt(0) == '*') {
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precision = +a[precision.slice(1, -1)];
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} else {
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precision = +precision;
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}
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// grab value using valueIndex if required?
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value = valueIndex ? a[valueIndex.slice(0, -1)] : a[i++];
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switch (type) {
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case 's': return formatString(String(value), leftJustify, minWidth, precision, zeroPad, customPadChar);
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case 'c': return formatString(String.fromCharCode(+value), leftJustify, minWidth, precision, zeroPad);
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case 'b': return formatBaseX(value, 2, prefixBaseX, leftJustify, minWidth, precision, zeroPad);
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case 'o': return formatBaseX(value, 8, prefixBaseX, leftJustify, minWidth, precision, zeroPad);
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case 'x': return formatBaseX(value, 16, prefixBaseX, leftJustify, minWidth, precision, zeroPad);
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case 'X': return formatBaseX(value, 16, prefixBaseX, leftJustify, minWidth, precision, zeroPad).toUpperCase();
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case 'u': return formatBaseX(value, 10, prefixBaseX, leftJustify, minWidth, precision, zeroPad);
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case 'i':
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case 'd': {
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number = parseInt(+value);
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prefix = number < 0 ? '-' : positivePrefix;
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value = prefix + pad(String(Math.abs(number)), precision, '0', false);
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return justify(value, prefix, leftJustify, minWidth, zeroPad);
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}
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case 'e':
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case 'E':
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case 'f':
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case 'F':
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case 'g':
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case 'G': {
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number = +value;
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prefix = number < 0 ? '-' : positivePrefix;
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method = ['toExponential', 'toFixed', 'toPrecision']['efg'.indexOf(type.toLowerCase())];
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textTransform = ['toString', 'toUpperCase']['eEfFgG'.indexOf(type) % 2];
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value = prefix + Math.abs(number)[method](precision);
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return justify(value, prefix, leftJustify, minWidth, zeroPad)[textTransform]();
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}
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default: return substring;
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}
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};
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return format.replace(regex, doFormat);
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}

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