1 files changed, 59 insertions, 0 deletions
diff --git a/node_modules/postcss-unrgba/index.js b/node_modules/postcss-unrgba/index.js
new file mode 100644
index 00000000..db5d67b1
--- /dev/null
+++ b/node_modules/postcss-unrgba/index.js
@@ -0,0 +1,59 @@
+var parser  = require('postcss-value-parser');
+var postcss = require('postcss');
+
+module.exports = postcss.plugin('postcss-color-rgba-fallback', function (opts) {
+	var method = opts && /^(clone|warn)$/i.test(opts.method) ? opts.method.toLowerCase() : 'replace';
+	var props  = opts && 'properties' in opts ? opts.properties : ['background', 'background-color', 'color', 'border', 'border-bottom', 'border-bottom-color', 'border-color', 'border-left', 'border-left-color', 'border-right', 'border-right-color', 'border-top', 'border-top-color', 'outline', 'outline-color'];
+	var filter = opts && opts.filter;
+
+	return function (css, result) {
+		css.walkRules(function (rule) {
+			var decls = {};
+
+			rule.nodes.forEach(function (decl) {
+				if (decl.prop in decls) decls[decl.prop] = false;
+				else decls[decl.prop] = (!props || ~props.indexOf(decl.prop)) && /\brgba\b/i.test(decl.value) ? decl : false;
+			});
+
+			Object.keys(decls).forEach(function (name) {
+				var decl = decls[name];
+
+				if (!decl) return;
+
+				var isbg = /^background/i.test(decl.prop);
+				var isbf = isbg && filter;
+
+				var value = parser(decl.value).walk(function (node) {
+					if (node.type === 'function' && node.value === 'rgba') {
+						if (method === 'warn') return result.warn('rgba() detected', { node: decl });
+
+						var rgba = [node.nodes[0], node.nodes[2], node.nodes[4], node.nodes[6]].map(function (word, index) {
+							return (0 + Math.round(word.value * (index === 3 ? 255 : 1)).toString(16)).slice(-2);
+						});
+
+						var argb = rgba.slice(-1).concat(rgba.slice(0, -1)).join('');
+
+						var hex  = rgba[3] === '00' ? 'transparent' : '#' + rgba.slice(0, 3).join('');
+
+						var word = isbf ? 'progid:DXImageTransform.Microsoft.gradient(GradientType=0,startColorstr=\'#' + argb + '\',endColorstr=\'#' + argb + '\')' : hex;
+
+						node.value = word;
+						node.type  = 'word';
+
+						if (isbf) {
+							decl.value = parser.stringify(node);
+							node.value = hex;
+						}
+					}
+				}).toString();
+
+				if (method !== 'warn' && value !== decl.value) {
+					if (method === 'clone' || isbf) decl.cloneBefore({ value: value });
+					else decl.value = value;
+
+					if (isbf) decl.prop = 'filter';
+				}
+			});
+		});
+	};
+});