nsMsgComposeContentHandler.cpp

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/* 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 "nsMsgComposeContentHandler.h"

#include "nsMsgComposeService.h"

#include "nsIChannel.h"

#include "nsIURI.h"

#include "plstr.h"

#include "nsServiceManagerUtils.h"

#include "nsCOMPtr.h"

#include "nsPIDOMWindow.h"

#include "mozIDOMWindow.h"

#include "mozilla/Components.h"

#include "mozilla/dom/Document.h"

#include "nsIInterfaceRequestor.h"

#include "nsIInterfaceRequestorUtils.h"

#include "nsIMsgMailNewsUrl.h"

#include "nsNetUtil.h"

#include "nsIMsgFolder.h"

#include "nsIMsgIncomingServer.h"

#include "nsIMsgAccountManager.h"

nsMsgComposeContentHandler::nsMsgComposeContentHandler() {}

// The following macro actually implement addref, release and query interface

// for our component.

NS_IMPL_ISUPPORTS(nsMsgComposeContentHandler, nsIContentHandler)

nsMsgComposeContentHandler::~nsMsgComposeContentHandler() {}

// Try to get an appropriate nsIMsgIdentity by going through the window, getting

// the document's URI, then the corresponding nsIMsgDBHdr. Then find the server

// associated with that header and get the first identity for it.

nsresult nsMsgComposeContentHandler::GetBestIdentity(

    nsIInterfaceRequestor* aWindowContext, nsIMsgIdentity** aIdentity) {

  nsresult rv;

  nsCOMPtr<mozIDOMWindowProxy> domWindow = do_GetInterface(aWindowContext);

  NS_ENSURE_TRUE(domWindow, NS_ERROR_FAILURE);

  nsCOMPtr<nsPIDOMWindowOuter> window = nsPIDOMWindowOuter::From(domWindow);

  nsAutoString documentURIString;

  rv = window->GetDoc()->GetDocumentURI(documentURIString);

  NS_ENSURE_SUCCESS(rv, rv);

  nsCOMPtr<nsIURI> documentURI;

  rv = NS_NewURI(getter_AddRefs(documentURI), documentURIString);

  NS_ENSURE_SUCCESS(rv, rv);

  nsCOMPtr<nsIMsgMessageUrl> msgURI = do_QueryInterface(documentURI);

  if (!msgURI) return NS_ERROR_FAILURE;

  nsCOMPtr<nsIMsgDBHdr> msgHdr;

  rv = msgURI->GetMessageHeader(getter_AddRefs(msgHdr));

  NS_ENSURE_SUCCESS(rv, rv);

  nsCOMPtr<nsIMsgFolder> folder;

  rv = msgHdr->GetFolder(getter_AddRefs(folder));

  NS_ENSURE_SUCCESS(rv, rv);

  // nsIMsgDBHdrs from .eml messages have a null folder, so bail out if that's

  // the case.

  if (!folder) return NS_ERROR_FAILURE;

  nsCOMPtr<nsIMsgIncomingServer> server;

  rv = folder->GetServer(getter_AddRefs(server));

  NS_ENSURE_SUCCESS(rv, rv);

  nsCOMPtr<nsIMsgAccountManager> accountManager =

      mozilla::components::AccountManager::Service();

  rv = accountManager->GetFirstIdentityForServer(server, aIdentity);

  NS_ENSURE_SUCCESS(rv, rv);

  return rv;

NS_IMETHODIMP nsMsgComposeContentHandler::HandleContent(

    const char* aContentType, nsIInterfaceRequestor* aWindowContext,

    nsIRequest* request) {

  nsresult rv = NS_OK;

  if (!request) return NS_ERROR_NULL_POINTER;

  // First of all, get the content type and make sure it is a content type we

  // know how to handle!

  if (PL_strcasecmp(aContentType, "application/x-mailto") == 0) {

    nsCOMPtr<nsIMsgIdentity> identity;

    if (aWindowContext)

      GetBestIdentity(aWindowContext, getter_AddRefs(identity));

    nsCOMPtr<nsIURI> aUri;

    nsCOMPtr<nsIChannel> aChannel = do_QueryInterface(request);

    if (!aChannel) return NS_ERROR_FAILURE;

    rv = aChannel->GetURI(getter_AddRefs(aUri));

    if (aUri) {

      nsCOMPtr<nsIMsgComposeService> composeService =

          mozilla::components::Compose::Service();

      rv = composeService->OpenComposeWindowWithURI(nullptr, aUri, identity,

                                                    nsIMsgCompFormat::Default);

  } else {

    // The content-type was not application/x-mailto...

    return NS_ERROR_WONT_HANDLE_CONTENT;

  return rv;