зеркало из https://github.com/mozilla/gecko-dev.git
148 строки
4.0 KiB
C++
148 строки
4.0 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "nsCommandHandler.h"
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#include "nsWebBrowser.h"
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#include "nsDocShellTreeOwner.h"
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#include "nsMemory.h"
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#include "nsPIDOMWindow.h"
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nsCommandHandler::nsCommandHandler() :
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mWindow(nullptr)
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{
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}
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nsCommandHandler::~nsCommandHandler()
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{
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}
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nsresult nsCommandHandler::GetCommandHandler(nsICommandHandler **aCommandHandler)
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{
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NS_ENSURE_ARG_POINTER(aCommandHandler);
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*aCommandHandler = nullptr;
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if (mWindow == nullptr)
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{
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return NS_ERROR_FAILURE;
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}
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nsCOMPtr<nsPIDOMWindow> window(do_QueryInterface(mWindow));
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if (!window)
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{
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return NS_ERROR_FAILURE;
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}
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// Get the document tree owner
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nsCOMPtr<nsIDocShellTreeItem> docShellAsTreeItem =
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do_QueryInterface(window->GetDocShell());
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nsIDocShellTreeOwner *treeOwner = nullptr;
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docShellAsTreeItem->GetTreeOwner(&treeOwner);
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// Make sure the tree owner is an an nsDocShellTreeOwner object
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// by QI'ing for a hidden interface. If it doesn't have the interface
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// then it's not safe to do the casting.
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nsCOMPtr<nsICDocShellTreeOwner> realTreeOwner(do_QueryInterface(treeOwner));
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if (realTreeOwner)
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{
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nsDocShellTreeOwner *tree = static_cast<nsDocShellTreeOwner *>(treeOwner);
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if (tree->mTreeOwner)
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{
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nsresult rv;
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rv = tree->mTreeOwner->QueryInterface(NS_GET_IID(nsICommandHandler), (void **)aCommandHandler);
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NS_RELEASE(treeOwner);
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return rv;
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}
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NS_RELEASE(treeOwner);
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}
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*aCommandHandler = nullptr;
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return NS_OK;
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}
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NS_IMPL_ADDREF(nsCommandHandler)
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NS_IMPL_RELEASE(nsCommandHandler)
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NS_INTERFACE_MAP_BEGIN(nsCommandHandler)
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NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsICommandHandler)
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NS_INTERFACE_MAP_ENTRY(nsICommandHandlerInit)
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NS_INTERFACE_MAP_ENTRY(nsICommandHandler)
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NS_INTERFACE_MAP_END
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///////////////////////////////////////////////////////////////////////////////
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// nsICommandHandlerInit implementation
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/* attribute nsIDocShell docShell; */
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NS_IMETHODIMP nsCommandHandler::GetWindow(nsIDOMWindow * *aWindow)
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{
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*aWindow = nullptr;
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return NS_OK;
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}
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NS_IMETHODIMP nsCommandHandler::SetWindow(nsIDOMWindow * aWindow)
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{
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if (aWindow == nullptr)
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{
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return NS_ERROR_FAILURE;
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}
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mWindow = aWindow;
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return NS_OK;
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}
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///////////////////////////////////////////////////////////////////////////////
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// nsICommandHandler implementation
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/* string exec (in string aCommand, in string aStatus); */
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NS_IMETHODIMP nsCommandHandler::Exec(const char *aCommand, const char *aStatus, char **aResult)
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{
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NS_ENSURE_ARG_POINTER(aCommand);
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NS_ENSURE_ARG_POINTER(aResult);
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nsCOMPtr<nsICommandHandler> commandHandler;
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GetCommandHandler(getter_AddRefs(commandHandler));
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// Call the client's command handler to deal with this command
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if (commandHandler)
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{
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*aResult = nullptr;
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return commandHandler->Exec(aCommand, aStatus, aResult);
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}
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// Return an empty string
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const char szEmpty[] = "";
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*aResult = (char *) nsMemory::Clone(szEmpty, sizeof(szEmpty));
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return NS_OK;
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}
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/* string query (in string aCommand, in string aStatus); */
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NS_IMETHODIMP nsCommandHandler::Query(const char *aCommand, const char *aStatus, char **aResult)
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{
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NS_ENSURE_ARG_POINTER(aCommand);
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NS_ENSURE_ARG_POINTER(aResult);
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nsCOMPtr<nsICommandHandler> commandHandler;
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GetCommandHandler(getter_AddRefs(commandHandler));
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// Call the client's command handler to deal with this command
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if (commandHandler)
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{
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*aResult = nullptr;
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return commandHandler->Query(aCommand, aStatus, aResult);
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}
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// Return an empty string
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const char szEmpty[] = "";
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*aResult = (char *) nsMemory::Clone(szEmpty, sizeof(szEmpty));
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return NS_OK;
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}
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