show confirmation leaving the page

kei-s · Nov 19, 2012 · 68b2ede · 68b2ede
1 parent f733d4c
commit 68b2ede
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Showing 2 changed files with 22 additions and 0 deletions.
diff --git a/public/scripts/app.js b/public/scripts/app.js
@@ -1,4 +1,6 @@
 $(function(){
+  if (typeof GithubPreview === 'undefined') GithubPreview = {};
+
   // keep text and preview at 100% height
   function resize() {
     var height = $(window).height() - $("#header").outerHeight() - 20;
@@ -85,4 +87,23 @@ $(function(){
       showHelp();
     }
   });
+
+  // confirmation
+  function setupConfirmation() {
+    GithubPreview.changedForm = false;
+    $(window).bind('beforeunload', function(e) {
+      if (GithubPreview.changedForm) {
+        console.log(e.clipboardData);
+        return 'You have uncopied changes.';
+      }
+    });
+
+    $('#text').bind('input', function() {
+      GithubPreview.changedForm = true;
+    }).bind('copy cut', function() {
+      GithubPreview.changedForm = false;
+    });
+  }
+  setupConfirmation();
+
 });
diff --git a/views/index.haml b/views/index.haml
@@ -21,6 +21,7 @@
         %a#showhelp{:href => "#"} Show Formatting Help
         :javascript
           function getText() {
+            GithubPreview.changedForm = false;
             return $('#text').val();
           }
         %object#clippy{classid: "clsid:d27cdb6e-ae6d-11cf-96b8-444553540000", width: "110", height: "14"}