[scannr.git] / js / flotr2 / js / plugins / download.js
--- a/js/flotr2/js/plugins/download.js
+++ b/js/flotr2/js/plugins/download.js
@@ -1,1 +1,52 @@
+(function() {
 
+var
+  D = Flotr.DOM,
+  _ = Flotr._;
+
+function getImage (type, canvas, width, height) {
+
+  // TODO add scaling for w / h
+  var
+    mime = 'image/'+type,
+    data = canvas.toDataURL(mime),
+    image = new Image();
+  image.src = data;
+  return image;
+}
+
+Flotr.addPlugin('download', {
+
+  saveImage: function (type, width, height, replaceCanvas) {
+    var image = null;
+    if (Flotr.isIE && Flotr.isIE < 9) {
+      image = '<html><body>'+this.canvas.firstChild.innerHTML+'</body></html>';
+      return window.open().document.write(image);
+    }
+
+    if (type !== 'jpeg' && type !== 'png') return;
+
+    image = getImage(type, this.canvas, width, height);
+
+    if (_.isElement(image) && replaceCanvas) {
+      this.download.restoreCanvas();
+      D.hide(this.canvas);
+      D.hide(this.overlay);
+      D.setStyles({position: 'absolute'});
+      D.insert(this.el, image);
+      this.saveImageElement = image;
+    } else {
+      return window.open(image.src);
+    }
+  },
+
+  restoreCanvas: function() {
+    D.show(this.canvas);
+    D.show(this.overlay);
+    if (this.saveImageElement) this.el.removeChild(this.saveImageElement);
+    this.saveImageElement = null;
+  }
+});
+
+})();
+