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4 years ago
var sourceMap = require('./sourceMap');
var hasOwnProperty = Object.prototype.hasOwnProperty;
function processChildren(node, delimeter) {
var list = node.children;
var prev = null;
if (typeof delimeter !== 'function') {
list.forEach(this.node, this);
} else {
list.forEach(function(node) {
if (prev !== null) {
delimeter.call(this, prev);
}
this.node(node);
prev = node;
}, this);
}
}
module.exports = function createGenerator(config) {
function processNode(node) {
if (hasOwnProperty.call(types, node.type)) {
types[node.type].call(this, node);
} else {
throw new Error('Unknown node type: ' + node.type);
}
}
var types = {};
if (config.node) {
for (var name in config.node) {
types[name] = config.node[name].generate;
}
}
return function(node, options) {
var buffer = '';
var handlers = {
children: processChildren,
node: processNode,
chunk: function(chunk) {
buffer += chunk;
},
result: function() {
return buffer;
}
};
if (options) {
if (typeof options.decorator === 'function') {
handlers = options.decorator(handlers);
}
if (options.sourceMap) {
handlers = sourceMap(handlers);
}
}
handlers.node(node);
return handlers.result();
};
};