bug #90722.(r=danm@netscape.com, sr=mscott@netscape.com) Added nsIWindowWatcher::GetWindowByName(...).

git-svn-id: svn://10.0.0.236/trunk@105296 18797224-902f-48f8-a5cc-f745e15eee43

mozilla/embedding/components/windowwatcher/public/nsIWindowWatcher.idl

@@ -136,6 +136,16 @@ interface nsIWindowWatcher : nsISupports {
   */
   nsIWebBrowserChrome getChromeForWindow(in nsIDOMWindow aWindow);
 
+  /**
+      Retrieve an existing window (or frame).
+      @param aTargetName the window name
+      @param aCurrentWindow a starting point in the window hierarchy to
+                            begin the search.  If null, each toplevel window
+                            will be searched.
+  */
+  nsIDOMWindow getWindowByName(in wstring aTargetName,
+                               in nsIDOMWindow aCurrentWindow);
+
   /** The Watcher serves as a global storage facility for the current active
       (frontmost non-floating-palette-type) window, storing and returning
       it on demand. Users must keep this attribute current, including after

mozilla/embedding/components/windowwatcher/src/nsWindowWatcher.cpp

@@ -960,6 +960,50 @@ nsWindowWatcher::GetChromeForWindow(nsIDOMWindow *aWindow, nsIWebBrowserChrome *
   return NS_OK;
 }
 
+NS_IMETHODIMP
+nsWindowWatcher::GetWindowByName(const PRUnichar *aTargetName, 
+                                 nsIDOMWindow *aCurrentWindow,
+                                 nsIDOMWindow **aResult)
+{
+  if (!aResult) {
+    return NS_ERROR_INVALID_ARG;
+  }
+
+  *aResult = nsnull;
+
+  nsCOMPtr<nsIWebNavigation> webNav;
+  nsCOMPtr<nsIDocShellTreeItem> treeItem;
+
+  // First, check if the TargetName exists in the aCurrentWindow hierarchy
+  webNav = do_GetInterface(aCurrentWindow);
+  if (webNav) {
+    nsCOMPtr<nsIDocShellTreeItem> docShellTreeItem;
+
+    docShellTreeItem = do_QueryInterface(webNav);
+    if (docShellTreeItem) {
+      docShellTreeItem->FindItemWithName(aTargetName, nsnull,
+                                         getter_AddRefs(treeItem));
+    }
+  }
+
+  // Next, see if the TargetName exists in any window hierarchy
+  if (!treeItem) {
+    FindItemWithName(aTargetName, getter_AddRefs(treeItem));
+  }
+
+  if (treeItem) {
+    nsCOMPtr<nsIDOMWindow> domWindow;
+
+    domWindow = do_GetInterface(treeItem);
+    if (domWindow) {
+      *aResult = domWindow;
+      NS_ADDREF(*aResult);
+    }
+  }
+
+  return NS_OK;
+}
+
 PRBool
 nsWindowWatcher::AddEnumerator(nsWatcherWindowEnumerator* inEnumerator)
 {