From faefc106eddfdc785b585a0eb0a27767b9600f94 Mon Sep 17 00:00:00 2001
From: "tbogard%aol.net" <tbogard%aol.net>
Date: Sun, 16 Apr 2000 06:14:38 +0000
Subject: [PATCH] Changed over from using the webshell APIs and
 nsISessionHistory to using the webNavigation interface on the docshell to go
 back and forward.  Don't have to get the root, docshell does that for you.

---
 content/events/src/nsEventStateManager.cpp | 27 +++++++---------------
 layout/events/src/nsEventStateManager.cpp  | 27 +++++++---------------
 2 files changed, 16 insertions(+), 38 deletions(-)

diff --git a/content/events/src/nsEventStateManager.cpp b/content/events/src/nsEventStateManager.cpp
index eee45f695d36..a99d0da69892 100644
--- a/content/events/src/nsEventStateManager.cpp
+++ b/content/events/src/nsEventStateManager.cpp
@@ -55,10 +55,11 @@
 #include "nsPIDOMWindow.h"
 #include "nsIEnumerator.h"
 #include "nsFrameTraversal.h"
+#include "nsIDocShellTreeItem.h"
+#include "nsIWebNavigation.h"
 
 #include "nsIServiceManager.h"
 #include "nsIPref.h"
-#include "nsISessionHistory.h"
 
 #include "nsXULAtoms.h"
 #include "nsIDOMXULDocument.h"
@@ -846,24 +847,12 @@ nsEventStateManager::PostHandleEvent(nsIPresContext* aPresContext,
           nsCOMPtr<nsISupports> pcContainer;
           mPresContext->GetContainer(getter_AddRefs(pcContainer));
           if (pcContainer) {
-            nsCOMPtr<nsIWebShell> webShell = do_QueryInterface(pcContainer);
-            if (webShell) {
-              nsCOMPtr<nsIWebShell> root;
-              webShell->GetRootWebShell(*getter_AddRefs(root));
-              if (nsnull != root) {
-                nsCOMPtr<nsISessionHistory> sHist;
-                root->GetSessionHistory(*getter_AddRefs(sHist));
-                if (sHist) {
-                  if (numLines > 0)
-                  {
-                    sHist->GoBack(root);
-                  }
-                  else
-                  {
-                    sHist->GoForward(root);
-                  }
-                }
-              }
+            nsCOMPtr<nsIWebNavigation> webNav(do_QueryInterface(pcContainer));
+            if (webNav) {
+              if (numLines > 0)
+                 webNav->GoBack();
+              else
+                 webNav->GoForward();
             }
           }
         }
diff --git a/layout/events/src/nsEventStateManager.cpp b/layout/events/src/nsEventStateManager.cpp
index eee45f695d36..a99d0da69892 100644
--- a/layout/events/src/nsEventStateManager.cpp
+++ b/layout/events/src/nsEventStateManager.cpp
@@ -55,10 +55,11 @@
 #include "nsPIDOMWindow.h"
 #include "nsIEnumerator.h"
 #include "nsFrameTraversal.h"
+#include "nsIDocShellTreeItem.h"
+#include "nsIWebNavigation.h"
 
 #include "nsIServiceManager.h"
 #include "nsIPref.h"
-#include "nsISessionHistory.h"
 
 #include "nsXULAtoms.h"
 #include "nsIDOMXULDocument.h"
@@ -846,24 +847,12 @@ nsEventStateManager::PostHandleEvent(nsIPresContext* aPresContext,
           nsCOMPtr<nsISupports> pcContainer;
           mPresContext->GetContainer(getter_AddRefs(pcContainer));
           if (pcContainer) {
-            nsCOMPtr<nsIWebShell> webShell = do_QueryInterface(pcContainer);
-            if (webShell) {
-              nsCOMPtr<nsIWebShell> root;
-              webShell->GetRootWebShell(*getter_AddRefs(root));
-              if (nsnull != root) {
-                nsCOMPtr<nsISessionHistory> sHist;
-                root->GetSessionHistory(*getter_AddRefs(sHist));
-                if (sHist) {
-                  if (numLines > 0)
-                  {
-                    sHist->GoBack(root);
-                  }
-                  else
-                  {
-                    sHist->GoForward(root);
-                  }
-                }
-              }
+            nsCOMPtr<nsIWebNavigation> webNav(do_QueryInterface(pcContainer));
+            if (webNav) {
+              if (numLines > 0)
+                 webNav->GoBack();
+              else
+                 webNav->GoForward();
             }
           }
         }