shrink Image element by image size.

lib/widget.js

@@ -6623,15 +6623,14 @@ Image.prototype.setImage = function(img, callback) {
       });
 
       // XXX Move below code to callback.
-      if (self.shrink) {
+      if (self.shrink || self.options.autofit) {
+        delete self.shrink;
+        delete self.options.shrink;
+        self.options.autofit = true;
         self.imageSize(img, function(err, size) {
           if (err) return;
-          if (self.position.width == null) {
-            self.position.width = size.width / tw | 0;
-          }
-          if (self.position.height == null) {
-            self.position.height = size.height / th | 0;
-          }
+          self.position.width = size.width / tw | 0;
+          self.position.height = size.height / th | 0;
         });
       }
 

test/widget-image.js

@@ -10,8 +10,8 @@ var img = blessed.image({
   parent: screen,
   left: 'center',
   top: 'center',
-  width: 20,
-  height: 20,
+  width: 'shrink',
+  height: 'shrink',
   bg: 'green',
   file: process.argv[2] || __dirname + '/test-image.png'
 });