1 files changed, 139 insertions, 0 deletions
diff --git a/embedding/browser/nsCommandHandler.cpp b/embedding/browser/nsCommandHandler.cpp
new file mode 100644
index 0000000000..1e41e265a4
--- /dev/null
+++ b/embedding/browser/nsCommandHandler.cpp
@@ -0,0 +1,139 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "nsCommandHandler.h"
+#include "nsWebBrowser.h"
+#include "nsDocShellTreeOwner.h"
+
+#include "nsMemory.h"
+#include "nsPIDOMWindow.h"
+
+nsCommandHandler::nsCommandHandler()
+  : mWindow(nullptr)
+{
+}
+
+nsCommandHandler::~nsCommandHandler()
+{
+}
+
+nsresult
+nsCommandHandler::GetCommandHandler(nsICommandHandler** aCommandHandler)
+{
+  NS_ENSURE_ARG_POINTER(aCommandHandler);
+
+  *aCommandHandler = nullptr;
+  if (!mWindow) {
+    return NS_ERROR_FAILURE;
+  }
+
+  // Get the document tree owner
+
+  nsCOMPtr<nsIDocShellTreeItem> docShellAsTreeItem =
+    do_QueryInterface(mWindow->GetDocShell());
+  nsIDocShellTreeOwner* treeOwner = nullptr;
+  docShellAsTreeItem->GetTreeOwner(&treeOwner);
+
+  // Make sure the tree owner is an an nsDocShellTreeOwner object
+  // by QI'ing for a hidden interface. If it doesn't have the interface
+  // then it's not safe to do the casting.
+
+  nsCOMPtr<nsICDocShellTreeOwner> realTreeOwner(do_QueryInterface(treeOwner));
+  if (realTreeOwner) {
+    nsDocShellTreeOwner* tree = static_cast<nsDocShellTreeOwner*>(treeOwner);
+    if (tree->mTreeOwner) {
+      nsresult rv;
+      rv = tree->mTreeOwner->QueryInterface(NS_GET_IID(nsICommandHandler),
+                                            (void**)aCommandHandler);
+      NS_RELEASE(treeOwner);
+      return rv;
+    }
+
+    NS_RELEASE(treeOwner);
+  }
+
+  *aCommandHandler = nullptr;
+
+  return NS_OK;
+}
+
+NS_IMPL_ADDREF(nsCommandHandler)
+NS_IMPL_RELEASE(nsCommandHandler)
+
+NS_INTERFACE_MAP_BEGIN(nsCommandHandler)
+  NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsICommandHandler)
+  NS_INTERFACE_MAP_ENTRY(nsICommandHandlerInit)
+  NS_INTERFACE_MAP_ENTRY(nsICommandHandler)
+NS_INTERFACE_MAP_END
+
+///////////////////////////////////////////////////////////////////////////////
+// nsICommandHandlerInit implementation
+
+NS_IMETHODIMP
+nsCommandHandler::GetWindow(mozIDOMWindowProxy** aWindow)
+{
+  *aWindow = nullptr;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsCommandHandler::SetWindow(mozIDOMWindowProxy* aWindow)
+{
+  if (!aWindow) {
+    return NS_ERROR_FAILURE;
+  }
+  mWindow = nsPIDOMWindowOuter::From(aWindow);
+  return NS_OK;
+}
+
+///////////////////////////////////////////////////////////////////////////////
+// nsICommandHandler implementation
+
+NS_IMETHODIMP
+nsCommandHandler::Exec(const char* aCommand, const char* aStatus,
+                       char** aResult)
+{
+  NS_ENSURE_ARG_POINTER(aCommand);
+  NS_ENSURE_ARG_POINTER(aResult);
+
+  nsCOMPtr<nsICommandHandler> commandHandler;
+  GetCommandHandler(getter_AddRefs(commandHandler));
+
+  // Call the client's command handler to deal with this command
+  if (commandHandler) {
+    *aResult = nullptr;
+    return commandHandler->Exec(aCommand, aStatus, aResult);
+  }
+
+  // Return an empty string
+  const char szEmpty[] = "";
+  *aResult = (char*)nsMemory::Clone(szEmpty, sizeof(szEmpty));
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsCommandHandler::Query(const char* aCommand, const char* aStatus,
+                        char** aResult)
+{
+  NS_ENSURE_ARG_POINTER(aCommand);
+  NS_ENSURE_ARG_POINTER(aResult);
+
+  nsCOMPtr<nsICommandHandler> commandHandler;
+  GetCommandHandler(getter_AddRefs(commandHandler));
+
+  // Call the client's command handler to deal with this command
+  if (commandHandler) {
+    *aResult = nullptr;
+    return commandHandler->Query(aCommand, aStatus, aResult);
+  }
+
+  // Return an empty string
+  const char szEmpty[] = "";
+  *aResult = (char*)nsMemory::Clone(szEmpty, sizeof(szEmpty));
+
+  return NS_OK;
+}