Fix assorted issues with fastback, including adding progress listener notifications and introducing the PageHide and PageShow events. See bug 292971 for all of the details. r=darin, sr=bzbarsky, a=shaver.

git-svn-id: svn://10.0.0.236/trunk@174651 18797224-902f-48f8-a5cc-f745e15eee43

mozilla/content/base/src/nsDocument.cpp

@@ -128,6 +128,7 @@ static NS_DEFINE_CID(kDOMEventGroupCID, NS_DOMEVENTGROUP_CID);
 #include "nsBindingManager.h"
 #include "nsIDOMHTMLFormElement.h"
 #include "nsIRequest.h"
+#include "nsILink.h"
 
 #include "nsICharsetAlias.h"
 static NS_DEFINE_CID(kCharsetAliasCID, NS_CHARSETALIAS_CID);
@@ -4909,3 +4910,73 @@ nsDocument::UnblockOnload()
     }
   }    
 }
+
+void
+nsDocument::OnPageShow(PRBool aPersisted)
+{
+  if (aPersisted) {
+    // Send out notifications that our <link> elements are attached.
+    nsRefPtr<nsContentList> links = NS_GetContentList(this,
+                                                      nsHTMLAtoms::link,
+                                                      kNameSpaceID_Unknown,
+                                                      mRootContent);
+
+    if (links) {
+      PRUint32 linkCount = links->Length(PR_TRUE);
+      for (PRUint32 i = 0; i < linkCount; ++i) {
+        nsCOMPtr<nsILink> link = do_QueryInterface(links->Item(i, PR_FALSE));
+        if (link) {
+          link->LinkAdded();
+        }
+      }
+    }
+  }
+
+  nsIPresShell *shell = NS_STATIC_CAST(nsIPresShell*, mPresShells[0]);
+  if (shell && mScriptGlobalObject) {
+    nsPresContext *pc = shell->GetPresContext();
+    if (pc) {
+      nsPageTransitionEvent event(PR_TRUE, NS_PAGE_SHOW, aPersisted);
+      nsEventStatus status = nsEventStatus_eIgnore;
+
+      mScriptGlobalObject->HandleDOMEvent(pc, &event, nsnull,
+                                          NS_EVENT_FLAG_INIT, &status);
+    }
+  }
+}
+
+void
+nsDocument::OnPageHide(PRBool aPersisted)
+{
+  // Send out notifications that our <link> elements are detached,
+  // but only if this is not a full unload.
+  if (aPersisted) {
+    nsRefPtr<nsContentList> links = NS_GetContentList(this,
+                                                      nsHTMLAtoms::link,
+                                                      kNameSpaceID_Unknown,
+                                                      mRootContent);
+
+    if (links) {
+      PRUint32 linkCount = links->Length(PR_TRUE);
+      for (PRUint32 i = 0; i < linkCount; ++i) {
+        nsCOMPtr<nsILink> link = do_QueryInterface(links->Item(i, PR_FALSE));
+        if (link) {
+          link->LinkRemoved();
+        }
+      }
+    }
+  }
+
+  // Now send out a PageHide event.
+  nsIPresShell *shell = NS_STATIC_CAST(nsIPresShell*, mPresShells[0]);
+  if (shell && mScriptGlobalObject) {
+    nsPresContext *pc = shell->GetPresContext();
+    if (pc) {
+      nsPageTransitionEvent event(PR_TRUE, NS_PAGE_HIDE, aPersisted);
+      nsEventStatus status = nsEventStatus_eIgnore;
+
+      mScriptGlobalObject->HandleDOMEvent(pc, &event, nsnull,
+                                          NS_EVENT_FLAG_INIT, &status);
+    }
+  }
+}

mozilla/content/base/src/nsDocument.h

@@ -440,6 +440,9 @@ public:
                                   PRUint32 aFlags,
                                   nsEventStatus* aEventStatus);
 
+  virtual void OnPageShow(PRBool aPersisted);
+  virtual void OnPageHide(PRBool aPersisted);
+
   // nsIRadioGroupContainer
   NS_IMETHOD WalkRadioGroup(const nsAString& aName,
                             nsIRadioVisitor* aVisitor);

mozilla/content/base/src/nsSyncLoadService.cpp

@@ -120,7 +120,6 @@ public:
     NS_IMETHOD Unload(nsIDOMEvent* aEvent);
     NS_IMETHOD Abort(nsIDOMEvent* aEvent);
     NS_IMETHOD Error(nsIDOMEvent* aEvent);
-    NS_IMETHOD PageRestore(nsIDOMEvent* aEvent);
 
     NS_DECL_NSICHANNELEVENTSINK
 
@@ -162,7 +161,6 @@ public:
     NS_IMETHOD Unload(nsIDOMEvent* aEvent);
     NS_IMETHOD Abort(nsIDOMEvent* aEvent);
     NS_IMETHOD Error(nsIDOMEvent* aEvent);
-    NS_IMETHOD PageRestore(nsIDOMEvent* aEvent);
 
 protected:
     nsWeakPtr  mParent;
@@ -251,18 +249,6 @@ txLoadListenerProxy::Error(nsIDOMEvent* aEvent)
     return NS_OK;
 }
 
-NS_IMETHODIMP
-txLoadListenerProxy::PageRestore(nsIDOMEvent* aEvent)
-{
-    nsCOMPtr<nsIDOMLoadListener> listener = do_QueryReferent(mParent);
-
-    if (listener) {
-        return listener->PageRestore(aEvent);
-    }
-
-    return NS_OK;
-}
-
 class nsForceXMLListener : public nsIStreamListener
 {
 public:
@@ -526,12 +512,6 @@ nsSyncLoader::Error(nsIDOMEvent* aEvent)
     return NS_OK;
 }
 
-NS_IMETHODIMP
-nsSyncLoader::PageRestore(nsIDOMEvent* aEvent)
-{
-    return NS_OK;
-}
-
 NS_IMETHODIMP
 nsSyncLoader::OnChannelRedirect(nsIChannel *aOldChannel,
                                 nsIChannel *aNewChannel,