You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
 
 
 

58 lines
1.5 KiB

'use strict';
var parsers = require('../parsers');
var valid_keywords = ['top', 'center', 'bottom', 'left', 'right'];
var parse = function parse(v) {
if (v === '' || v === null) {
return undefined;
}
var parts = v.split(/\s+/);
if (parts.length > 2 || parts.length < 1) {
return undefined;
}
var types = [];
parts.forEach(function(part, index) {
types[index] = parsers.valueType(part);
});
if (parts.length === 1) {
if (types[0] === parsers.TYPES.LENGTH || types[0] === parsers.TYPES.PERCENT) {
return v;
}
if (types[0] === parsers.TYPES.KEYWORD) {
if (valid_keywords.indexOf(v.toLowerCase()) !== -1 || v.toLowerCase() === 'inherit') {
return v;
}
}
return undefined;
}
if (
(types[0] === parsers.TYPES.LENGTH || types[0] === parsers.TYPES.PERCENT) &&
(types[1] === parsers.TYPES.LENGTH || types[1] === parsers.TYPES.PERCENT)
) {
return v;
}
if (types[0] !== parsers.TYPES.KEYWORD || types[1] !== parsers.TYPES.KEYWORD) {
return undefined;
}
if (valid_keywords.indexOf(parts[0]) !== -1 && valid_keywords.indexOf(parts[1]) !== -1) {
return v;
}
return undefined;
};
module.exports.isValid = function isValid(v) {
return parse(v) !== undefined;
};
module.exports.definition = {
set: function(v) {
this._setProperty('background-position', parse(v));
},
get: function() {
return this.getPropertyValue('background-position');
},
enumerable: true,
configurable: true,
};