63 lines
1.4 KiB
JavaScript
63 lines
1.4 KiB
JavaScript
// Copyright (c) 2014 Rafael Caricio. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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var GradientParser = (GradientParser || {});
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GradientParser.stringify = (function() {
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var visitor = {
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'visit_linear-gradient': function(node) {
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var orientation = visitor.visit(node.orientation);
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if (orientation) {
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orientation += ', ';
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}
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return 'linear-gradient('+ orientation + visitor.visit(node.colorStops) + ')';
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},
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visit_literal: function(node) {
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return node.value;
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},
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visit_array: function(elements) {
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var result = '',
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size = elements.length;
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elements.forEach(function(element, i) {
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result += visitor.visit(element);
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if (i < size - 1) {
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result += ', ';
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}
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});
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return result;
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},
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visit: function(element) {
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if (!element) {
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return '';
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}
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if (element instanceof Array) {
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return visitor.visit_array(element, result);
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} else if (element.type) {
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var nodeVisitor = visitor['visit_' + element.type];
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if (nodeVisitor) {
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return nodeVisitor(element);
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} else {
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throw Error('Missing visitor visit_' + element.type);
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}
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} else {
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throw Error('Invalid node.');
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}
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}
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};
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return function(root) {
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return visitor.visit(root);
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};
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})();
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