'use strict';
|
|
var FS = require('fs');
|
|
/**
|
* Encode plain SVG data string into Data URI string.
|
*
|
* @param {String} str input string
|
* @param {String} type Data URI type
|
* @return {String} output string
|
*/
|
exports.encodeSVGDatauri = function(str, type) {
|
|
var prefix = 'data:image/svg+xml';
|
|
// base64
|
if (!type || type === 'base64') {
|
|
prefix += ';base64,';
|
if (Buffer.from) {
|
str = prefix + Buffer.from(str).toString('base64');
|
} else {
|
str = prefix + new Buffer(str).toString('base64');
|
}
|
|
// URI encoded
|
} else if (type === 'enc') {
|
|
str = prefix + ',' + encodeURIComponent(str);
|
|
// unencoded
|
} else if (type === 'unenc') {
|
|
str = prefix + ',' + str;
|
|
}
|
|
return str;
|
|
};
|
|
/**
|
* Decode SVG Data URI string into plain SVG string.
|
*
|
* @param {string} str input string
|
* @return {String} output string
|
*/
|
exports.decodeSVGDatauri = function(str) {
|
var regexp = /data:image\/svg\+xml(;charset=[^;,]*)?(;base64)?,(.*)/;
|
var match = regexp.exec(str);
|
|
// plain string
|
if (!match) return str;
|
|
var data = match[3];
|
|
// base64
|
if (match[2]) {
|
|
str = new Buffer(data, 'base64').toString('utf8');
|
|
// URI encoded
|
} else if (data.charAt(0) === '%') {
|
|
str = decodeURIComponent(data);
|
|
// unencoded
|
} else if (data.charAt(0) === '<') {
|
|
str = data;
|
|
}
|
|
return str;
|
};
|
|
exports.intersectArrays = function(a, b) {
|
return a.filter(function(n) {
|
return b.indexOf(n) > -1;
|
});
|
};
|
|
exports.cleanupOutData = function(data, params) {
|
|
var str = '',
|
delimiter,
|
prev;
|
|
data.forEach(function(item, i) {
|
|
// space delimiter by default
|
delimiter = ' ';
|
|
// no extra space in front of first number
|
if (i === 0) {
|
delimiter = '';
|
}
|
|
// remove floating-point numbers leading zeros
|
// 0.5 → .5
|
// -0.5 → -.5
|
if (params.leadingZero) {
|
item = removeLeadingZero(item);
|
}
|
|
// no extra space in front of negative number or
|
// in front of a floating number if a previous number is floating too
|
if (
|
params.negativeExtraSpace &&
|
(item < 0 ||
|
(String(item).charCodeAt(0) == 46 && prev % 1 !== 0)
|
)
|
) {
|
delimiter = '';
|
}
|
|
// save prev item value
|
prev = item;
|
|
str += delimiter + item;
|
|
});
|
|
return str;
|
|
};
|
|
/**
|
* Remove floating-point numbers leading zero.
|
*
|
* @example
|
* 0.5 → .5
|
*
|
* @example
|
* -0.5 → -.5
|
*
|
* @param {Float} num input number
|
*
|
* @return {String} output number as string
|
*/
|
var removeLeadingZero = exports.removeLeadingZero = function(num) {
|
var strNum = num.toString();
|
|
if (0 < num && num < 1 && strNum.charCodeAt(0) == 48) {
|
strNum = strNum.slice(1);
|
} else if (-1 < num && num < 0 && strNum.charCodeAt(1) == 48) {
|
strNum = strNum.charAt(0) + strNum.slice(2);
|
}
|
|
return strNum;
|
|
};
|
|
|
/**
|
* Synchronously check if path is a directory. Tolerant to errors like ENOENT.
|
* @param {string} path
|
*/
|
exports.checkIsDir = function(path) {
|
try {
|
return FS.lstatSync(path).isDirectory();
|
} catch(e) {
|
return false;
|
}
|
};
|
