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// Utilities
//
'use strict';
function _class(obj) { return Object.prototype.toString.call(obj); }
function isString(obj) { return _class(obj) === '[object String]'; }
// Merge objects
//
function assign(obj /*from1, from2, from3, ...*/) {
var sources = Array.prototype.slice.call(arguments, 1);
while (sources.length) {
var source = sources.shift();
if (!source) { continue; }
10 years ago
if (typeof source !== 'object') {
throw new TypeError(source + 'must be object');
}
for (var p in source) {
if (source.hasOwnProperty(p)) {
obj[p] = source[p];
}
}
}
return obj;
}
var UNESCAPE_MD_RE = /\\([\\!"#$%&'()*+,.\/:;<=>?@[\]^_`{|}~-])/g;
function unescapeMd(str) {
if (str.indexOf('\\') < 0) { return str; }
return str.replace(UNESCAPE_MD_RE, '$1');
}
function isValidEntityCode(c) {
/*eslint no-bitwise:0*/
// broken sequence
if (c >= 0xD800 && c <= 0xDFFF) { return false; }
// never used
if (c >= 0xFDD0 && c <= 0xFDEF) { return false; }
if ((c & 0xFFFF) === 0xFFFF || (c & 0xFFFF) === 0xFFFE) { return false; }
// control codes
if (c >= 0x00 && c <= 0x08) { return false; }
if (c === 0x0B) { return false; }
if (c >= 0x0E && c <= 0x1F) { return false; }
if (c >= 0x7F && c <= 0x9F) { return false; }
// out of range
if (c > 0x10FFFF) { return false; }
return true;
}
function fromCodePoint(c) {
/*eslint no-bitwise:0*/
if (c > 0xffff) {
c -= 0x10000;
var surrogate1 = 0xd800 + (c >> 10),
surrogate2 = 0xdc00 + (c & 0x3ff);
return String.fromCharCode(surrogate1, surrogate2);
}
return String.fromCharCode(c);
}
var NAMED_ENTITY_RE = /&([a-z][a-z0-9]{1,31});/gi;
var entities = require('./entities');
function replaceEntities(str) {
if (str.indexOf('&') < 0) { return str; }
return str.replace(NAMED_ENTITY_RE, function(match, name) {
if (entities.hasOwnProperty(name)) {
return entities[name];
}
return match;
});
}
exports.assign = assign;
exports.isString = isString;
exports.unescapeMd = unescapeMd;
exports.isValidEntityCode = isValidEntityCode;
exports.fromCodePoint = fromCodePoint;
exports.replaceEntities = replaceEntities;