hexo/node_modules/stylus/lib/convert/css.js

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2023-09-25 15:58:56 +08:00
/*!
* Stylus - CSS to Stylus conversion
* Copyright (c) Automattic <developer.wordpress.com>
* MIT Licensed
*/
/**
* Convert the given `css` to Stylus source.
*
* @param {String} css
* @return {String}
* @api public
*/
module.exports = function(css){
return new Converter(css).stylus();
};
/**
* Initialize a new `Converter` with the given `css`.
*
* @param {String} css
* @api private
*/
function Converter(css) {
var { parse } = require('css');
this.css = css;
this.root = parse(css, { position: false });
this.indents = 0;
}
/**
* Convert to Stylus.
*
* @return {String}
* @api private
*/
Converter.prototype.stylus = function(){
return this.visitRules(this.root.stylesheet.rules);
};
/**
* Return indent string.
*
* @return {String}
* @api private
*/
Converter.prototype.__defineGetter__('indent', function(){
return Array(this.indents + 1).join(' ');
});
/**
* Visit `node`.
*
* @param {*} node
* @return {String}
* @api private
*/
Converter.prototype.visit = function(node){
switch (node.type) {
case 'rule':
case 'comment':
case 'charset':
case 'namespace':
case 'media':
case 'import':
case 'document':
case 'keyframes':
case 'page':
case 'host':
case 'supports':
var name = node.type[0].toUpperCase() + node.type.slice(1);
return this['visit' + name](node);
case 'font-face':
return this.visitFontFace(node);
}
};
/**
* Visit the rules on `node`.
*
* @param {Array} node
* @return {String}
* @api private
*/
Converter.prototype.visitRules = function(node){
var buf = '';
for (var i = 0, len = node.length; i < len; ++i) {
buf += this.visit(node[i]);
}
return buf;
};
/**
* Visit FontFace `node`.
*
* @param {FontFace} node
* @return {String}
* @api private
*/
Converter.prototype.visitFontFace = function(node){
var buf = this.indent + '@font-face';
buf += '\n';
++this.indents;
for (var i = 0, len = node.declarations.length; i < len; ++i) {
buf += this.visitDeclaration(node.declarations[i]);
}
--this.indents;
return buf;
};
/**
* Visit Media `node`.
*
* @param {Media} node
* @return {String}
* @api private
*/
Converter.prototype.visitMedia = function(node){
var buf = this.indent + '@media ' + node.media;
buf += '\n';
++this.indents;
buf += this.visitRules(node.rules);
--this.indents;
return buf;
};
/**
* Visit Declaration `node`.
*
* @param {Declaration} node
* @return {String}
* @api private
*/
Converter.prototype.visitDeclaration = function(node){
if ('comment' == node.type) {
return this.visitComment(node);
} else {
var buf = this.indent + node.property + ': ' + node.value + '\n';
return buf;
}
};
/**
* Visit Rule `node`.`
*
* @param {Rule} node
* @return {String}
* @api private
*/
Converter.prototype.visitRule = function(node){
var buf = this.indent + node.selectors.join(',\n' + this.indent) + '\n';
++this.indents;
for (var i = 0, len = node.declarations.length; i < len; ++i) {
buf += this.visitDeclaration(node.declarations[i]);
}
--this.indents;
return buf + '\n';
};
/**
* Visit Comment `node`.`
*
* @param {Comment} node
* @return {String}
* @api private
*/
Converter.prototype.visitComment = function(node){
var buf = this.indent + '/*' + node.comment + '*/';
return buf + '\n';
};
/**
* Visit Charset `node`.`
*
* @param {Charset} node
* @return {String}
* @api private
*/
Converter.prototype.visitCharset = function(node){
var buf = this.indent + '@charset ' + node.charset;
return buf + '\n';
};
/**
* Visit Namespace `node`.`
*
* @param {Namespace} node
* @return {String}
* @api private
*/
Converter.prototype.visitNamespace = function(node){
var buf = this.indent + '@namespace ' + node.namespace;
return buf + '\n';
};
/**
* Visit Import `node`.`
*
* @param {Import} node
* @return {String}
* @api private
*/
Converter.prototype.visitImport = function(node){
var buf = this.indent + '@import ' + node.import;
return buf + '\n';
};
/**
* Visit Document `node`.`
*
* @param {Document} node
* @return {String}
* @api private
*/
Converter.prototype.visitDocument = function(node){
var buf = this.indent + '@' + node.vendor + 'document ' + node.document;
buf += '\n';
++this.indents;
buf += this.visitRules(node.rules);
--this.indents;
return buf;
};
/**
* Visit Keyframes `node`.`
*
* @param {Keyframes} node
* @return {String}
* @api private
*/
Converter.prototype.visitKeyframes = function(node){
var buf = this.indent + '@keyframes ' + node.name;
buf += '\n';
++this.indents;
for (var i = 0, len = node.keyframes.length; i < len; ++i) {
buf += this.visitKeyframe(node.keyframes[i]);
}
--this.indents;
return buf;
};
/**
* Visit Keyframe `node`.`
*
* @param {Keyframe} node
* @return {String}
* @api private
*/
Converter.prototype.visitKeyframe = function(node){
var buf = this.indent + node.values.join(', ');
buf += '\n';
++this.indents;
for (var i = 0, len = node.declarations.length; i < len; ++i) {
buf += this.visitDeclaration(node.declarations[i]);
}
--this.indents;
return buf;
};
/**
* Visit Page `node`.`
*
* @param {Page} node
* @return {String}
* @api private
*/
Converter.prototype.visitPage = function(node){
var buf = this.indent + '@page' + (node.selectors.length ? ' ' + node.selectors.join(', ') : '');
buf += '\n';
++this.indents;
for (var i = 0, len = node.declarations.length; i < len; ++i) {
buf += this.visitDeclaration(node.declarations[i]);
}
--this.indents;
return buf;
};
/**
* Visit Supports `node`.`
*
* @param {Supports} node
* @return {String}
* @api private
*/
Converter.prototype.visitSupports = function(node){
var buf = this.indent + '@supports ' + node.supports;
buf += '\n';
++this.indents;
buf += this.visitRules(node.rules);
--this.indents;
return buf;
};
/**
* Visit Host `node`.`
*
* @param {Host} node
* @return {String}
* @api private
*/
Converter.prototype.visitHost = function(node){
var buf = this.indent + '@host';
buf += '\n';
++this.indents;
buf += this.visitRules(node.rules);
--this.indents;
return buf;
};