StyleSheet.js
2.24 KB
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var TYPE = require('../../tokenizer').TYPE;
var WHITESPACE = TYPE.WhiteSpace;
var COMMENT = TYPE.Comment;
var ATKEYWORD = TYPE.AtKeyword;
var CDO = TYPE.CDO;
var CDC = TYPE.CDC;
var EXCLAMATIONMARK = 0x0021; // U+0021 EXCLAMATION MARK (!)
function consumeRaw(startToken) {
return this.Raw(startToken, null, false);
}
module.exports = {
name: 'StyleSheet',
structure: {
children: [[
'Comment',
'CDO',
'CDC',
'Atrule',
'Rule',
'Raw'
]]
},
parse: function() {
var start = this.scanner.tokenStart;
var children = this.createList();
var child;
scan:
while (!this.scanner.eof) {
switch (this.scanner.tokenType) {
case WHITESPACE:
this.scanner.next();
continue;
case COMMENT:
// ignore comments except exclamation comments (i.e. /*! .. */) on top level
if (this.scanner.source.charCodeAt(this.scanner.tokenStart + 2) !== EXCLAMATIONMARK) {
this.scanner.next();
continue;
}
child = this.Comment();
break;
case CDO: // <!--
child = this.CDO();
break;
case CDC: // -->
child = this.CDC();
break;
// CSS Syntax Module Level 3
// §2.2 Error handling
// At the "top level" of a stylesheet, an <at-keyword-token> starts an at-rule.
case ATKEYWORD:
child = this.parseWithFallback(this.Atrule, consumeRaw);
break;
// Anything else starts a qualified rule ...
default:
child = this.parseWithFallback(this.Rule, consumeRaw);
}
children.push(child);
}
return {
type: 'StyleSheet',
loc: this.getLocation(start, this.scanner.tokenStart),
children: children
};
},
generate: function(node) {
this.children(node);
},
walkContext: 'stylesheet'
};