docshell/base/nsWebNavigationInfo.cpp

   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 "nsWebNavigationInfo.h"
   8
   9 #include "nsServiceManagerUtils.h"
  10 #include "nsIDocumentLoaderFactory.h"
  11 #include "nsContentUtils.h"
  12 #include "imgLoader.h"
  13
  14 NS_IMPL_ISUPPORTS(nsWebNavigationInfo, nsIWebNavigationInfo)
  15
  16 NS_IMETHODIMP
  17 nsWebNavigationInfo::IsTypeSupported(const nsACString& aType,
  18                                      uint32_t* aIsTypeSupported) {
  19   MOZ_ASSERT(aIsTypeSupported, "null out param?");
  20
  21   *aIsTypeSupported = IsTypeSupported(aType);
  22   return NS_OK;
  23 }
  24
  25 uint32_t nsWebNavigationInfo::IsTypeSupported(const nsACString& aType) {
  26   // We want to claim that the type for PDF documents is unsupported,
  27   // so that the internal PDF viewer's stream converted will get used.
  28   if (aType.LowerCaseEqualsLiteral("application/pdf") &&
  29       nsContentUtils::IsPDFJSEnabled()) {
  30     return nsIWebNavigationInfo::UNSUPPORTED;
  31   }
  32
  33   const nsCString& flatType = PromiseFlatCString(aType);
  34   return IsTypeSupportedInternal(flatType);
  35 }
  36
  37 uint32_t nsWebNavigationInfo::IsTypeSupportedInternal(const nsCString& aType) {
  38   nsContentUtils::DocumentViewerType vtype = nsContentUtils::TYPE_UNSUPPORTED;
  39
  40   nsCOMPtr<nsIDocumentLoaderFactory> docLoaderFactory =
  41       nsContentUtils::FindInternalDocumentViewer(aType, &vtype);
  42
  43   switch (vtype) {
  44     case nsContentUtils::TYPE_UNSUPPORTED:
  45       return nsIWebNavigationInfo::UNSUPPORTED;
  46
  47     case nsContentUtils::TYPE_FALLBACK:
  48       return nsIWebNavigationInfo::FALLBACK;
  49
  50     case nsContentUtils::TYPE_UNKNOWN:
  51       return nsIWebNavigationInfo::OTHER;
  52
  53     case nsContentUtils::TYPE_CONTENT:
  54       // XXXbz we only need this because images register for the same
  55       // contractid as documents, so we can't tell them apart based on
  56       // contractid.
  57       if (imgLoader::SupportImageWithMimeType(aType)) {
  58         return nsIWebNavigationInfo::IMAGE;
  59       }
  60       return nsIWebNavigationInfo::OTHER;
  61   }
  62
  63   return nsIWebNavigationInfo::UNSUPPORTED;
  64 }