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