add a data-uri function

as described in a comment on #775
less · Jan 5, 2013 · 24e4108 · 24e4108
1 parent d56e0a4
commit 24e4108
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diff --git a/lib/less/functions.js b/lib/less/functions.js
@@ -1,3 +1,5 @@
+var fs = require('fs');
+
 (function (tree) {
 
 tree.functions = {
@@ -345,6 +347,18 @@ tree.functions = {
     },
     shade: function(color, amount) {
         return this.mix(this.rgb(0, 0, 0), color, amount);
+    },
+    "data-uri": function(mimetype, path) {
+        var data = fs.readFileSync(path.value);
+        mimetype = mimetype.value;
+
+        if (/;base64$/.test(mimetype)) {
+          data = (new Buffer(data)).toString('base64');
+        }
+
+        var contents = new(tree.Anonymous)('data:'+mimetype+','+data);
+
+        return new(tree.URL)(contents);
     }
 };
 

diff --git a/test/css/functions.css b/test/css/functions.css
@@ -99,3 +99,6 @@
   average: #7b007b;
   negation: #d73131;
 }
+#data-uri {
+  background-image: url(data:image/jpeg;base64,bm90IGFjdHVhbGx5IGEganBlZyBmaWxlCg==);
+}
diff --git a/test/data/image.jpg b/test/data/image.jpg
diff --git a/test/less/functions.less b/test/less/functions.less
@@ -110,3 +110,7 @@
   average: average(#f60000, #0000f6);
   negation: negation(#f60000, #313131);
 }
+
+#data-uri {
+  background-image: data-uri('image/jpeg;base64', 'test/data/image.jpg');
+}