Adjust the size of the bubble to the size of its content in Safari

safari/ext/popup.js

-with (safari.extension.globalPage.contentWindow)
+(function()
 {
-  this.ext = ext;
-  this.TabMap = TabMap;
-}
+  // Safari will load the popover once, and then show it everytime the icon is
+  // clicked. While Chrome loads it everytime you click the icon. So in order to
+  // force the same behavior in Safari, we are going to reload the page of the
+  // bubble everytime it is shown.
+  safari.application.addEventListener("popover", function()
+  {
+    document.documentElement.style.display = "none";
+    document.location.reload();
+  }, true);
 
-// Safari will load the popover once, and then show it everytime the icon is
-// clicked. While Chrome loads it everytime you click the icon. So in order to
-// force the same behavior in Safari, we are going to reload the page of the
-// bubble everytime it is shown.
-safari.application.addEventListener("popover", function()
-{
-  document.documentElement.style.display = "none";
-  document.location.reload();
-}, true);
 
-// Safari doesn't hide popovers automatically, when we change the active tab
-// programmatically, like when the options link is clicked. So we add an event
-// listener to do so.
-safari.application.addEventListener("activate", function()
-{
-  safari.self.hide();
-}, true);
+  // Safari doesn't adjust the size of the popover automatically to the size
+  // of its content, like when the ad counter is expanded/collapsed. So we add
+  // event listeners to do so.
+  var updateSize = function()
+  {
+    safari.self.width = document.body.offsetWidth;
+    safari.self.height = document.body.offsetHeight;
+  };
 
-// Safari doesn't adjust the size of the popover automatically to the size of
-// its content, like when the ad counter is expanded/collapsed. So we add an
-// event listener to do so.
-document.addEventListener("DOMSubtreeModified", function()
-{
-  safari.self.width = document.body.offsetWidth;
-  safari.self.height = document.body.offsetHeight;

[Wladimir Palant, 2014/01/15 15:47:13]

What about document.documentElement.offsetWidth/Height, doesn't it have the
right value? IMHO that should be used here.

[Sebastian Noack, 2014/01/15 17:21:52]

No, it doesn't has the right value (sometimes?). Don't know whether we have the
wrong expectations or whether it is a Safari bug. But document.body works fine.

-});
+  window.addEventListener("load", function()
+  {
+    updateSize();
+
+    var MutationObserver = window.MutationObserver || window.WebKitMutationObserver;
+    if (MutationObserver)
+    {
+      new MutationObserver(updateSize).observe(document, {
+        childList: true, attributes: true,
+        characterData: true, subtree: true
+      });
+    }
+    else
+      document.addEventListener("DOMSubtreeModified", updateSize);
+  });
+
+
+  // import ext into the javascript context of the popover. This code might fail,
+  // when the background page isn't ready yet. So it is important to put it below
+  // the reloading code above.
+  var backgroundPage = safari.extension.globalPage.contentWindow;
+  window.ext = backgroundPage.ext;
+  window.TabMap = backgroundPage.TabMap;
+})();