74 lines
1.8 KiB
JavaScript
74 lines
1.8 KiB
JavaScript
|
var hasOwnProperty = Object.prototype.hasOwnProperty;
|
||
|
|
var knownKeywords = Object.create(null);
|
||
|
|
var knownProperties = Object.create(null);
|
||
|
|
|
||
|
|
function getVendorPrefix(string) {
|
||
|
|
if (string[0] === '-') {
|
||
|
|
// skip 2 chars to avoid wrong match with variables names
|
||
|
|
var secondDashIndex = string.indexOf('-', 2);
|
||
|
|
|
||
|
|
if (secondDashIndex !== -1) {
|
||
|
|
return string.substr(0, secondDashIndex + 1);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return '';
|
||
|
|
}
|
||
|
|
|
||
|
|
function getKeywordInfo(keyword) {
|
||
|
|
if (hasOwnProperty.call(knownKeywords, keyword)) {
|
||
|
|
return knownKeywords[keyword];
|
||
|
|
}
|
||
|
|
|
||
|
|
var lowerCaseKeyword = keyword.toLowerCase();
|
||
|
|
var vendor = getVendorPrefix(lowerCaseKeyword);
|
||
|
|
var name = lowerCaseKeyword;
|
||
|
|
|
||
|
|
if (vendor) {
|
||
|
|
name = name.substr(vendor.length);
|
||
|
|
}
|
||
|
|
|
||
|
|
return knownKeywords[keyword] = Object.freeze({
|
||
|
|
vendor: vendor,
|
||
|
|
prefix: vendor,
|
||
|
|
name: name
|
||
|
|
});
|
||
|
|
}
|
||
|
|
|
||
|
|
function getPropertyInfo(property) {
|
||
|
|
if (hasOwnProperty.call(knownProperties, property)) {
|
||
|
|
return knownProperties[property];
|
||
|
|
}
|
||
|
|
|
||
|
|
var lowerCaseProperty = property.toLowerCase();
|
||
|
|
var hack = lowerCaseProperty[0];
|
||
|
|
|
||
|
|
if (hack === '*' || hack === '_' || hack === '$') {
|
||
|
|
lowerCaseProperty = lowerCaseProperty.substr(1);
|
||
|
|
} else if (hack === '/' && property[1] === '/') {
|
||
|
|
hack = '//';
|
||
|
|
lowerCaseProperty = lowerCaseProperty.substr(2);
|
||
|
|
} else {
|
||
|
|
hack = '';
|
||
|
|
}
|
||
|
|
|
||
|
|
var vendor = getVendorPrefix(lowerCaseProperty);
|
||
|
|
var name = lowerCaseProperty;
|
||
|
|
|
||
|
|
if (vendor) {
|
||
|
|
name = name.substr(vendor.length);
|
||
|
|
}
|
||
|
|
|
||
|
|
return knownProperties[property] = Object.freeze({
|
||
|
|
hack: hack,
|
||
|
|
vendor: vendor,
|
||
|
|
prefix: hack + vendor,
|
||
|
|
name: name
|
||
|
|
});
|
||
|
|
}
|
||
|
|
|
||
|
|
module.exports = {
|
||
|
|
keyword: getKeywordInfo,
|
||
|
|
property: getPropertyInfo
|
||
|
|
};
|