lepu-test-platform-web/node_modules/autoprefixer/lib/value.js

168 lines
4.9 KiB
JavaScript

'use strict';
function _defaults(obj, defaults) { var keys = Object.getOwnPropertyNames(defaults); for (var i = 0; i < keys.length; i++) { var key = keys[i]; var value = Object.getOwnPropertyDescriptor(defaults, key); if (value && value.configurable && obj[key] === undefined) { Object.defineProperty(obj, key, value); } } return obj; }
function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
function _possibleConstructorReturn(self, call) { if (!self) { throw new ReferenceError("this hasn't been initialised - super() hasn't been called"); } return call && (typeof call === "object" || typeof call === "function") ? call : self; }
function _inherits(subClass, superClass) { if (typeof superClass !== "function" && superClass !== null) { throw new TypeError("Super expression must either be null or a function, not " + typeof superClass); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, enumerable: false, writable: true, configurable: true } }); if (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : _defaults(subClass, superClass); }
var Prefixer = require('./prefixer');
var OldValue = require('./old-value');
var utils = require('./utils');
var vendor = require('postcss').vendor;
var Value = function (_Prefixer) {
_inherits(Value, _Prefixer);
function Value() {
_classCallCheck(this, Value);
return _possibleConstructorReturn(this, _Prefixer.apply(this, arguments));
}
/**
* Clone decl for each prefixed values
*/
Value.save = function save(prefixes, decl) {
var _this2 = this;
var prop = decl.prop;
var result = [];
var _loop = function _loop(prefix) {
var value = decl._autoprefixerValues[prefix];
if (value === decl.value) {
return 'continue';
}
var item = void 0;
var propPrefix = vendor.prefix(prop);
if (propPrefix === '-pie-') {
return 'continue';
}
if (propPrefix === prefix) {
item = decl.value = value;
result.push(item);
return 'continue';
}
var prefixed = prefixes.prefixed(prop, prefix);
var rule = decl.parent;
if (!rule.every(function (i) {
return i.prop !== prefixed;
})) {
result.push(item);
return 'continue';
}
var trimmed = value.replace(/\s+/, ' ');
var already = rule.some(function (i) {
return i.prop === decl.prop && i.value.replace(/\s+/, ' ') === trimmed;
});
if (already) {
result.push(item);
return 'continue';
}
var cloned = _this2.clone(decl, { value: value });
item = decl.parent.insertBefore(decl, cloned);
result.push(item);
};
for (var prefix in decl._autoprefixerValues) {
var _ret = _loop(prefix);
if (_ret === 'continue') continue;
}
return result;
};
/**
* Is declaration need to be prefixed
*/
Value.prototype.check = function check(decl) {
var value = decl.value;
if (value.indexOf(this.name) === -1) {
return false;
}
return !!value.match(this.regexp());
};
/**
* Lazy regexp loading
*/
Value.prototype.regexp = function regexp() {
return this.regexpCache || (this.regexpCache = utils.regexp(this.name));
};
/**
* Add prefix to values in string
*/
Value.prototype.replace = function replace(string, prefix) {
return string.replace(this.regexp(), '$1' + prefix + '$2');
};
/**
* Get value with comments if it was not changed
*/
Value.prototype.value = function value(decl) {
if (decl.raws.value && decl.raws.value.value === decl.value) {
return decl.raws.value.raw;
} else {
return decl.value;
}
};
/**
* Save values with next prefixed token
*/
Value.prototype.add = function add(decl, prefix) {
if (!decl._autoprefixerValues) {
decl._autoprefixerValues = {};
}
var value = decl._autoprefixerValues[prefix] || this.value(decl);
var before = void 0;
do {
before = value;
value = this.replace(value, prefix);
if (value === false) return;
} while (value !== before);
decl._autoprefixerValues[prefix] = value;
};
/**
* Return function to fast find prefixed value
*/
Value.prototype.old = function old(prefix) {
return new OldValue(this.name, prefix + this.name);
};
return Value;
}(Prefixer);
module.exports = Value;