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/**
* Module dependencies.
*/
var Base = require('./compiler');
var inherits = require('inherits');
/**
* Expose compiler.
*/
module.exports = Compiler;
/**
* Initialize a new `Compiler`.
*/
function Compiler(options) {
options = options || {};
Base.call(this, options);
this.indentation = options.indent;
}
/**
* Inherit from `Base.prototype`.
*/
inherits(Compiler, Base);
/**
* Compile `node`.
*/
Compiler.prototype.compile = function(node){
return this.stylesheet(node);
};
/**
* Visit stylesheet node.
*/
Compiler.prototype.stylesheet = function(node){
return this.mapVisit(node.stylesheet.rules, '\n\n');
};
/**
* Visit comment node.
*/
Compiler.prototype.comment = function(node){
return this.emit(this.indent() + '/*' + node.comment + '*/', node.position);
};
/**
* Visit import node.
*/
Compiler.prototype.import = function(node){
return this.emit('@import ' + node.import + ';', node.position);
};
/**
* Visit media node.
*/
Compiler.prototype.media = function(node){
return this.emit('@media ' + node.media, node.position)
+ this.emit(
' {\n'
+ this.indent(1))
+ this.mapVisit(node.rules, '\n\n')
+ this.emit(
this.indent(-1)
+ '\n}');
};
/**
* Visit document node.
*/
Compiler.prototype.document = function(node){
var doc = '@' + (node.vendor || '') + 'document ' + node.document;
return this.emit(doc, node.position)
+ this.emit(
' '
+ ' {\n'
+ this.indent(1))
+ this.mapVisit(node.rules, '\n\n')
+ this.emit(
this.indent(-1)
+ '\n}');
};
/**
* Visit charset node.
*/
Compiler.prototype.charset = function(node){
return this.emit('@charset ' + node.charset + ';', node.position);
};
/**
* Visit namespace node.
*/
Compiler.prototype.namespace = function(node){
return this.emit('@namespace ' + node.namespace + ';', node.position);
};
/**
* Visit supports node.
*/
Compiler.prototype.supports = function(node){
return this.emit('@supports ' + node.supports, node.position)
+ this.emit(
' {\n'
+ this.indent(1))
+ this.mapVisit(node.rules, '\n\n')
+ this.emit(
this.indent(-1)
+ '\n}');
};
/**
* Visit keyframes node.
*/
Compiler.prototype.keyframes = function(node){
return this.emit('@' + (node.vendor || '') + 'keyframes ' + node.name, node.position)
+ this.emit(
' {\n'
+ this.indent(1))
+ this.mapVisit(node.keyframes, '\n')
+ this.emit(
this.indent(-1)
+ '}');
};
/**
* Visit keyframe node.
*/
Compiler.prototype.keyframe = function(node){
var decls = node.declarations;
return this.emit(this.indent())
+ this.emit(node.values.join(', '), node.position)
+ this.emit(
' {\n'
+ this.indent(1))
+ this.mapVisit(decls, '\n')
+ this.emit(
this.indent(-1)
+ '\n'
+ this.indent() + '}\n');
};
/**
* Visit page node.
*/
Compiler.prototype.page = function(node){
var sel = node.selectors.length
? node.selectors.join(', ') + ' '
: '';
return this.emit('@page ' + sel, node.position)
+ this.emit('{\n')
+ this.emit(this.indent(1))
+ this.mapVisit(node.declarations, '\n')
+ this.emit(this.indent(-1))
+ this.emit('\n}');
};
/**
* Visit font-face node.
*/
Compiler.prototype['font-face'] = function(node){
return this.emit('@font-face ', node.position)
+ this.emit('{\n')
+ this.emit(this.indent(1))
+ this.mapVisit(node.declarations, '\n')
+ this.emit(this.indent(-1))
+ this.emit('\n}');
};
/**
* Visit host node.
*/
Compiler.prototype.host = function(node){
return this.emit('@host', node.position)
+ this.emit(
' {\n'
+ this.indent(1))
+ this.mapVisit(node.rules, '\n\n')
+ this.emit(
this.indent(-1)
+ '\n}');
};
/**
* Visit custom-media node.
*/
Compiler.prototype['custom-media'] = function(node){
return this.emit('@custom-media ' + node.name + ' ' + node.media + ';', node.position);
};
/**
* Visit rule node.
*/
Compiler.prototype.rule = function(node){
var indent = this.indent();
var decls = node.declarations;
if (!decls.length) return '';
return this.emit(node.selectors.map(function(s){ return indent + s }).join(',\n'), node.position)
+ this.emit(' {\n')
+ this.emit(this.indent(1))
+ this.mapVisit(decls, '\n')
+ this.emit(this.indent(-1))
+ this.emit('\n' + this.indent() + '}');
};
/**
* Visit declaration node.
*/
Compiler.prototype.declaration = function(node){
return this.emit(this.indent())
+ this.emit(node.property + ': ' + node.value, node.position)
+ this.emit(';');
};
/**
* Increase, decrease or return current indentation.
*/
Compiler.prototype.indent = function(level) {
this.level = this.level || 1;
if (null != level) {
this.level += level;
return '';
}
return Array(this.level).join(this.indentation || ' ');
};