Line data    Source code

       1             : /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
       2             : /* vim: set ts=8 sts=2 et sw=2 tw=80: */
       3             : /* This Source Code Form is subject to the terms of the Mozilla Public
       4             :  * License, v. 2.0. If a copy of the MPL was not distributed with this
       5             :  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
       6             : 
       7             : #include "nsCommandHandler.h"
       8             : #include "nsWebBrowser.h"
       9             : #include "nsDocShellTreeOwner.h"
      10             : 
      11             : #include "nsMemory.h"
      12             : #include "nsPIDOMWindow.h"
      13             : 
      14           0 : nsCommandHandler::nsCommandHandler()
      15           0 :   : mWindow(nullptr)
      16             : {
      17           0 : }
      18             : 
      19           0 : nsCommandHandler::~nsCommandHandler()
      20             : {
      21           0 : }
      22             : 
      23             : nsresult
      24           0 : nsCommandHandler::GetCommandHandler(nsICommandHandler** aCommandHandler)
      25             : {
      26           0 :   NS_ENSURE_ARG_POINTER(aCommandHandler);
      27             : 
      28           0 :   *aCommandHandler = nullptr;
      29           0 :   if (!mWindow) {
      30           0 :     return NS_ERROR_FAILURE;
      31             :   }
      32             : 
      33             :   // Get the document tree owner
      34             : 
      35             :   nsCOMPtr<nsIDocShellTreeItem> docShellAsTreeItem =
      36           0 :     do_QueryInterface(mWindow->GetDocShell());
      37           0 :   nsIDocShellTreeOwner* treeOwner = nullptr;
      38           0 :   docShellAsTreeItem->GetTreeOwner(&treeOwner);
      39             : 
      40             :   // Make sure the tree owner is an an nsDocShellTreeOwner object
      41             :   // by QI'ing for a hidden interface. If it doesn't have the interface
      42             :   // then it's not safe to do the casting.
      43             : 
      44           0 :   nsCOMPtr<nsICDocShellTreeOwner> realTreeOwner(do_QueryInterface(treeOwner));
      45           0 :   if (realTreeOwner) {
      46           0 :     nsDocShellTreeOwner* tree = static_cast<nsDocShellTreeOwner*>(treeOwner);
      47           0 :     if (tree->mTreeOwner) {
      48             :       nsresult rv;
      49           0 :       rv = tree->mTreeOwner->QueryInterface(NS_GET_IID(nsICommandHandler),
      50           0 :                                             (void**)aCommandHandler);
      51           0 :       NS_RELEASE(treeOwner);
      52           0 :       return rv;
      53             :     }
      54             : 
      55           0 :     NS_RELEASE(treeOwner);
      56             :   }
      57             : 
      58           0 :   *aCommandHandler = nullptr;
      59             : 
      60           0 :   return NS_OK;
      61             : }
      62             : 
      63           0 : NS_IMPL_ADDREF(nsCommandHandler)
      64           0 : NS_IMPL_RELEASE(nsCommandHandler)
      65             : 
      66           0 : NS_INTERFACE_MAP_BEGIN(nsCommandHandler)
      67           0 :   NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsICommandHandler)
      68           0 :   NS_INTERFACE_MAP_ENTRY(nsICommandHandlerInit)
      69           0 :   NS_INTERFACE_MAP_ENTRY(nsICommandHandler)
      70           0 : NS_INTERFACE_MAP_END
      71             : 
      72             : ///////////////////////////////////////////////////////////////////////////////
      73             : // nsICommandHandlerInit implementation
      74             : 
      75             : NS_IMETHODIMP
      76           0 : nsCommandHandler::GetWindow(mozIDOMWindowProxy** aWindow)
      77             : {
      78           0 :   *aWindow = nullptr;
      79           0 :   return NS_OK;
      80             : }
      81             : 
      82             : NS_IMETHODIMP
      83           0 : nsCommandHandler::SetWindow(mozIDOMWindowProxy* aWindow)
      84             : {
      85           0 :   if (!aWindow) {
      86           0 :     return NS_ERROR_FAILURE;
      87             :   }
      88           0 :   mWindow = nsPIDOMWindowOuter::From(aWindow);
      89           0 :   return NS_OK;
      90             : }
      91             : 
      92             : ///////////////////////////////////////////////////////////////////////////////
      93             : // nsICommandHandler implementation
      94             : 
      95             : NS_IMETHODIMP
      96           0 : nsCommandHandler::Exec(const char* aCommand, const char* aStatus,
      97             :                        char** aResult)
      98             : {
      99           0 :   NS_ENSURE_ARG_POINTER(aCommand);
     100           0 :   NS_ENSURE_ARG_POINTER(aResult);
     101             : 
     102           0 :   nsCOMPtr<nsICommandHandler> commandHandler;
     103           0 :   GetCommandHandler(getter_AddRefs(commandHandler));
     104             : 
     105             :   // Call the client's command handler to deal with this command
     106           0 :   if (commandHandler) {
     107           0 :     *aResult = nullptr;
     108           0 :     return commandHandler->Exec(aCommand, aStatus, aResult);
     109             :   }
     110             : 
     111             :   // Return an empty string
     112           0 :   const char szEmpty[] = "";
     113           0 :   *aResult = (char*)nsMemory::Clone(szEmpty, sizeof(szEmpty));
     114             : 
     115           0 :   return NS_OK;
     116             : }
     117             : 
     118             : NS_IMETHODIMP
     119           0 : nsCommandHandler::Query(const char* aCommand, const char* aStatus,
     120             :                         char** aResult)
     121             : {
     122           0 :   NS_ENSURE_ARG_POINTER(aCommand);
     123           0 :   NS_ENSURE_ARG_POINTER(aResult);
     124             : 
     125           0 :   nsCOMPtr<nsICommandHandler> commandHandler;
     126           0 :   GetCommandHandler(getter_AddRefs(commandHandler));
     127             : 
     128             :   // Call the client's command handler to deal with this command
     129           0 :   if (commandHandler) {
     130           0 :     *aResult = nullptr;
     131           0 :     return commandHandler->Query(aCommand, aStatus, aResult);
     132             :   }
     133             : 
     134             :   // Return an empty string
     135           0 :   const char szEmpty[] = "";
     136           0 :   *aResult = (char*)nsMemory::Clone(szEmpty, sizeof(szEmpty));
     137             : 
     138           0 :   return NS_OK;
     139             : }