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/* -*- 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;
}
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