bug 481914 - dialogs shouldn't be larger than available screen space. Listen to soft keyboad notifications r=neil

toolkit/content/commonDialog.js

@@ -1,3 +1,4 @@
+/* -*- Mode: C;  c-basic-offset: 2; tab-width: 2; indent-tabs-mode: nil; -*- */
 /* ***** BEGIN LICENSE BLOCK *****
  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
  *
@@ -38,9 +39,13 @@
  *
  * ***** END LICENSE BLOCK ***** */
 
+const Ci = Components.interfaces;
+const Cr = Components.results;
+const Cc = Components.classes;
+
 // parameters to gCommonDialogParam.Get() are defined in nsPIPromptService.idl
 var gCommonDialogParam = 
-  window.arguments[0].QueryInterface(Components.interfaces.nsIDialogParamBlock);
+  window.arguments[0].QueryInterface(Ci.nsIDialogParamBlock);
   
 function showControls()
 {
@@ -101,6 +106,27 @@ function setLabelForNode(aNode, aLabel, aIsLabelFlag)
     aNode.accessKey = accessKey;
 }
 
+var softkbObserver = {
+ QueryInterface: function (aIID) {
+    if (aIID.equals(Ci.nsISupports) ||
+        aIID.equals(Ci.nsIObserver))
+      return this;
+    throw Cr.NS_ERROR_NO_INTERFACE;
+  },
+ observe: function(subject, topic, data) {
+    if (topic === "softkb-change") {
+      var rect = JSON.parse(data);
+      if (rect) {
+        var height = rect.bottom - rect.top;
+        var width = rect.right - rect.left;
+        var top = (rect.top + (height - window.innerHeight) / 2);
+        var left = (rect.left + width - window.innerWidth) / 2);
+        window.moveTo(left, top);
+      }
+    }
+  }
+};
+
 function commonDialogOnLoad()
 {
   // limit the dialog to the screen width
@@ -113,6 +139,10 @@ function commonDialogOnLoad()
   document.title = gCommonDialogParam.GetString(12);
 #endif
 
+  var observerService = Cc["@mozilla.org/observer-service;1"]
+                          .getService(Ci.nsIObserverService);
+  observerService.addObserver(softkbObserver, "softkb-change", false);
+
   // set the number of command buttons
   var nButtons = gCommonDialogParam.GetInt(2);
   var dialog = document.documentElement;
@@ -182,8 +212,8 @@ function commonDialogOnLoad()
   {
     var delayInterval = 2000;
     try {
-      var prefs = Components.classes["@mozilla.org/preferences-service;1"]
+      var prefs = Cc["@mozilla.org/preferences-service;1"]
-                  .getService(Components.interfaces.nsIPrefBranch);
+                    .getService(Ci.nsIPrefBranch);
       delayInterval = prefs.getIntPref("security.dialog_enable_delay");
     } catch (e) {}
 
@@ -203,13 +233,19 @@ function commonDialogOnLoad()
   try {
     var sound = gCommonDialogParam.GetString(13);
     if (sound) {
-      Components.classes["@mozilla.org/sound;1"]
+      Cc["@mozilla.org/sound;1"]
-                .createInstance(Components.interfaces.nsISound)
+        .createInstance(Ci.nsISound)
         .playSystemSound(sound);
     }
   } catch (e) { }
 }
 
+function commonDialogOnUnload(){
+  var observerService = Cc["@mozilla.org/observer-service;1"]
+                          .getService(Ci.nsIObserverService);
+  observerService.removeObserver(softkbObserver, "softkb-change");
+}
+
 var gDelayExpired = false;
 var gBlurred = false;
 

toolkit/content/commonDialog.xul

@@ -10,6 +10,7 @@
         xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul" 
         aria-describedby="info.body"
         onload="commonDialogOnLoad();"
+        onunload="commonDialogOnUnload();"
         ondialogaccept="return commonDialogOnAccept();"
         ondialogextra1="return commonDialogOnExtra1();"
         ondialogextra2="return commonDialogOnExtra2();"