complete redesign: use nodejs on server instead of php - documentation to be updated

nodejs/node_modules/stylus/lib/functions/image-size.js

@@ -0,0 +1,58 @@
+var utils = require('../utils')
+  , nodes = require('../nodes')
+  , Image = require('./image');
+
+/**
+ * Return the width and height of the given `img` path.
+ *
+ * Examples:
+ *
+ *    image-size('foo.png')
+ *    // => 200px 100px
+ *
+ *    image-size('foo.png')[0]
+ *    // => 200px
+ *
+ *    image-size('foo.png')[1]
+ *    // => 100px
+ *
+ * Can be used to test if the image exists,
+ * using an optional argument set to `true`
+ * (without this argument this function throws error
+ * if there is no such image).
+ *
+ * Example:
+ *
+ *    image-size('nosuchimage.png', true)[0]
+ *    // => 0
+ *
+ * @param {String} img
+ * @param {Boolean} ignoreErr
+ * @return {Expression}
+ * @api public
+ */
+
+module.exports = function imageSize(img, ignoreErr) {
+  utils.assertType(img, 'string', 'img');
+  try {
+    var img = new Image(this, img.string);
+  } catch (err) {
+    if (ignoreErr) {
+      return [new nodes.Unit(0), new nodes.Unit(0)];
+    } else {
+      throw err;
+    }
+  }
+
+  // Read size
+  img.open();
+  var size = img.size();
+  img.close();
+
+  // Return (w h)
+  var expr = [];
+  expr.push(new nodes.Unit(size[0], 'px'));
+  expr.push(new nodes.Unit(size[1], 'px'));
+
+  return expr;
+};