fix for bug #183331, searchBar.js

when restoring a "pre" quick search view,
heed a similar scrolling logic that
we have for folder loading.

for mail views, this means switching back to the "all" view.

fix for bug #186504, msgMail3PaneWindow.js

when loading a folder, try to scroll to "new" messages first,
before "remembering the last selected" message.

both fixes by neil@parkwaycc.co.uk.  r/sr=sspitzer

mailnews/base/resources/content/msgMail3PaneWindow.js

@@ -183,9 +183,22 @@ var folderListener = {
              }
            }
            if (uri == gCurrentLoadingFolderURI) {
+             // NOTE,
+             // if you change the scrolling code below,
+             // double check the scrolling logic in
+             // searchBar.js, restorePreSearchView()
+
              gCurrentLoadingFolderURI = "";
 
+             // if we didn't just scroll, 
+             // scroll to the first new message
+             // but don't select it
+             if (!scrolled)
+               scrolled = ScrollToMessage(nsMsgNavigationType.firstNew, true, false /* selectMessage */);
+
              if (!scrolled && pref.getBoolPref("mailnews.remember_selected_message")) {
+               // if we failed to scroll to a new message,
+               // reselect the last selected message
                var lastMessageLoaded = msgFolder.lastMessageLoaded;
                  
                if (lastMessageLoaded != nsMsgKey_None) {
@@ -193,30 +206,31 @@ var folderListener = {
                }
              }
 
-             // Now let's select the first new message if there is one
              if (!scrolled) {
-               // if we didn't just scroll, scroll to the first new message
-               // don't select it though
-               scrolled = ScrollToMessage(nsMsgNavigationType.firstNew, true, false /* selectMessage */);
-                    
-               // if we failed to find a new message, 
+               // if we still haven't scrolled,
                // scroll to the newest, which might be the top or the bottom
                // depending on our sort order and sort type
-               if (!scrolled) {
-                 if (gDBView.sortOrder == nsMsgViewSortOrder.ascending) {
-                   switch (gDBView.sortType) {
-                     case nsMsgViewSortType.byDate: 
-                     case nsMsgViewSortType.byId: 
-                     case nsMsgViewSortType.byThread: 
-                       scrolled = ScrollToMessage(nsMsgNavigationType.lastMessage, true, false /* selectMessage */);
-                       break;
-                   }
+               if (gDBView.sortOrder == nsMsgViewSortOrder.ascending) {
+                 switch (gDBView.sortType) {
+                   case nsMsgViewSortType.byDate: 
+                   case nsMsgViewSortType.byId: 
+                   case nsMsgViewSortType.byThread: 
+                     scrolled = ScrollToMessage(nsMsgNavigationType.lastMessage, true, false /* selectMessage */);
+                     break;
                  }
                }
 
+               // if still we haven't scrolled,
+               // scroll to the top.
                if (!scrolled)
                  EnsureRowInThreadTreeIsVisible(0);
-             }
+             }            
+
+             // NOTE,
+             // if you change the scrolling code above,
+             // double check the scrolling logic in
+             // searchBar.js, restorePreSearchView()
+
              SetBusyCursor(window, false);
            }
            if (gNotifyDefaultInboxLoadedOnStartup && (folder.flags & 0x1000))

mailnews/base/resources/content/searchBar.js

@@ -218,19 +218,60 @@ function restorePreSearchView()
 
   RerootThreadPane();
    
-  //now restore selection
+  var scrolled = false;
+  
+  // now restore selection
   if (selectedHdr)
   {
     gDBView.selectMsgByKey(selectedHdr.messageKey);
     var treeView = gDBView.QueryInterface(Components.interfaces.nsITreeView);
     var selectedIndex = treeView.selection.currentIndex;
-    if (selectedIndex >= 0)  //scroll
+    if (selectedIndex >= 0) 
+    {
+      // scroll
       EnsureRowInThreadTreeIsVisible(selectedIndex);
+      scrolled = true;
+    }
     else
       ClearMessagePane();
   }
-  else
-    ScrollToMessage(nsMsgNavigationType.firstNew, true, false /* selectMessage */);
+
+  // NOTE,
+  // if you change the scrolling code below,
+  // double check the scrolling logic in
+  // msgMail3PaneWindow.js, "FolderLoaded" event code
+  if (!scrolled)
+  {
+    // if we didn't just scroll, 
+    // scroll to the first new message
+    // but don't select it
+    scrolled = ScrollToMessage(nsMsgNavigationType.firstNew, true, false /* selectMessage */);
+    if (!scrolled) 
+    {
+      // if we still haven't scrolled,
+      // scroll to the newest, which might be the top or the bottom
+      // depending on our sort order and sort type
+      if (sortOrder == nsMsgViewSortOrder.ascending) 
+      {
+        switch (sortType) 
+        {
+          case nsMsgViewSortType.byDate: 
+          case nsMsgViewSortType.byId: 
+          case nsMsgViewSortType.byThread: 
+            scrolled = ScrollToMessage(nsMsgNavigationType.lastMessage, true, false /* selectMessage */);
+            break;
+        }
+      }
+      // if still we haven't scrolled,
+      // scroll to the top.
+      if (!scrolled)
+        EnsureRowInThreadTreeIsVisible(0);
+    }
+  }
+  // NOTE,
+  // if you change the scrolling code above,
+  // double check the scrolling logic in
+  // msgMail3PaneWindow.js, "FolderLoaded" event code
 }
 
 function onSearch(aSearchTerms)