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var isCustomProperty = require('../../utils/names').isCustomProperty;
var TYPE = require('../../tokenizer').TYPE;
var IDENTIFIER = TYPE.Identifier;
var COLON = TYPE.Colon;
var EXCLAMATIONMARK = TYPE.ExclamationMark;
var SOLIDUS = TYPE.Solidus;
var ASTERISK = TYPE.Asterisk;
var DOLLARSIGN = TYPE.DollarSign;
var HYPHENMINUS = TYPE.HyphenMinus;
var SEMICOLON = TYPE.Semicolon;
var PLUSSIGN = TYPE.PlusSign;
var NUMBERSIGN = TYPE.NumberSign;
function consumeValueRaw(startToken) {
return this.Raw(startToken, EXCLAMATIONMARK, SEMICOLON, false, true);
}
function consumeCustomPropertyRaw(startToken) {
return this.Raw(startToken, EXCLAMATIONMARK, SEMICOLON, false, false);
}
function consumeValue() {
var startValueToken = this.scanner.currentToken;
var value = this.Value();
if (value.type !== 'Raw' &&
this.scanner.eof === false &&
this.scanner.tokenType !== SEMICOLON &&
this.scanner.tokenType !== EXCLAMATIONMARK &&
this.scanner.isBalanceEdge(startValueToken) === false) {
this.scanner.error();
}
return value;
}
module.exports = {
name: 'Declaration',
structure: {
important: [Boolean, String],
property: String,
value: ['Value', 'Raw']
},
parse: function() {
var start = this.scanner.tokenStart;
var startToken = this.scanner.currentToken;
var property = readProperty.call(this);
var customProperty = isCustomProperty(property);
var parseValue = customProperty ? this.parseCustomProperty : this.parseValue;
var consumeRaw = customProperty ? consumeCustomPropertyRaw : consumeValueRaw;
var important = false;
var value;
this.scanner.skipSC();
this.scanner.eat(COLON);
if (!customProperty) {
this.scanner.skipSC();
}
if (parseValue) {
value = this.parseWithFallback(consumeValue, consumeRaw);
} else {
value = consumeRaw.call(this, this.scanner.currentToken);
}
if (this.scanner.tokenType === EXCLAMATIONMARK) {
important = getImportant(this.scanner);
this.scanner.skipSC();
}
// Do not include semicolon to range per spec
// https://drafts.csswg.org/css-syntax/#declaration-diagram
if (this.scanner.eof === false &&
this.scanner.tokenType !== SEMICOLON &&
this.scanner.isBalanceEdge(startToken) === false) {
this.scanner.error();
}
return {
type: 'Declaration',
loc: this.getLocation(start, this.scanner.tokenStart),
important: important,
property: property,
value: value
};
},
generate: function(node) {
this.chunk(node.property);
this.chunk(':');
this.node(node.value);
if (node.important) {
this.chunk(node.important === true ? '!important' : '!' + node.important);
}
},
walkContext: 'declaration'
};
function readProperty() {
var start = this.scanner.tokenStart;
var prefix = 0;
// hacks
switch (this.scanner.tokenType) {
case ASTERISK:
case DOLLARSIGN:
case PLUSSIGN:
case NUMBERSIGN:
prefix = 1;
break;
// TODO: not sure we should support this hack
case SOLIDUS:
prefix = this.scanner.lookupType(1) === SOLIDUS ? 2 : 1;
break;
}
if (this.scanner.lookupType(prefix) === HYPHENMINUS) {
prefix++;
}
if (prefix) {
this.scanner.skip(prefix);
}
this.scanner.eat(IDENTIFIER);
return this.scanner.substrToCursor(start);
}
// ! ws* important
function getImportant(scanner) {
scanner.eat(EXCLAMATIONMARK);
scanner.skipSC();
var important = scanner.consume(IDENTIFIER);
// store original value in case it differ from `important`
// for better original source restoring and hacks like `!ie` support
return important === 'important' ? true : important;
}