dom/base/nsMimeTypeArray.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 "nsMimeTypeArray.h"
   8
   9 #include "mozilla/dom/MimeTypeArrayBinding.h"
  10 #include "mozilla/dom/MimeTypeBinding.h"
  11 #include "nsPIDOMWindow.h"
  12 #include "nsPluginArray.h"
  13 #include "mozilla/dom/Navigator.h"
  14 #include "nsServiceManagerUtils.h"
  15 #include "nsContentUtils.h"
  16 #include "nsPluginTags.h"
  17
  18 using namespace mozilla;
  19 using namespace mozilla::dom;
  20
  21 NS_IMPL_CYCLE_COLLECTING_ADDREF(nsMimeTypeArray)
  22 NS_IMPL_CYCLE_COLLECTING_RELEASE(nsMimeTypeArray)
  23 NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(nsMimeTypeArray)
  24   NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
  25   NS_INTERFACE_MAP_ENTRY(nsISupports)
  26 NS_INTERFACE_MAP_END
  27
  28 NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE(nsMimeTypeArray, mWindow, mMimeTypes,
  29                                       mCTPMimeTypes)
  30
  31 nsMimeTypeArray::nsMimeTypeArray(nsPIDOMWindowInner* aWindow)
  32     : mWindow(aWindow) {}
  33
  34 nsMimeTypeArray::~nsMimeTypeArray() = default;
  35
  36 JSObject* nsMimeTypeArray::WrapObject(JSContext* aCx,
  37                                       JS::Handle<JSObject*> aGivenProto) {
  38   return MimeTypeArray_Binding::Wrap(aCx, this, aGivenProto);
  39 }
  40
  41 void nsMimeTypeArray::Refresh() {
  42   mMimeTypes.Clear();
  43   mCTPMimeTypes.Clear();
  44 }
  45
  46 nsPIDOMWindowInner* nsMimeTypeArray::GetParentObject() const {
  47   MOZ_ASSERT(mWindow);
  48   return mWindow;
  49 }
  50
  51 nsMimeType* nsMimeTypeArray::Item(uint32_t aIndex, CallerType aCallerType) {
  52   bool unused;
  53   return IndexedGetter(aIndex, unused, aCallerType);
  54 }
  55
  56 nsMimeType* nsMimeTypeArray::NamedItem(const nsAString& aName,
  57                                        CallerType aCallerType) {
  58   bool unused;
  59   return NamedGetter(aName, unused, aCallerType);
  60 }
  61
  62 nsMimeType* nsMimeTypeArray::IndexedGetter(uint32_t aIndex, bool& aFound,
  63                                            CallerType aCallerType) {
  64   aFound = false;
  65
  66   if (nsContentUtils::ResistFingerprinting(aCallerType)) {
  67     return nullptr;
  68   }
  69
  70   EnsurePluginMimeTypes();
  71
  72   if (aIndex >= mMimeTypes.Length()) {
  73     return nullptr;
  74   }
  75
  76   aFound = true;
  77
  78   return mMimeTypes[aIndex];
  79 }
  80
  81 static nsMimeType* FindMimeType(const nsTArray<RefPtr<nsMimeType>>& aMimeTypes,
  82                                 const nsAString& aType) {
  83   for (uint32_t i = 0; i < aMimeTypes.Length(); ++i) {
  84     nsMimeType* mimeType = aMimeTypes[i];
  85     if (aType.Equals(mimeType->Type())) {
  86       return mimeType;
  87     }
  88   }
  89
  90   return nullptr;
  91 }
  92
  93 nsMimeType* nsMimeTypeArray::NamedGetter(const nsAString& aName, bool& aFound,
  94                                          CallerType aCallerType) {
  95   aFound = false;
  96
  97   if (nsContentUtils::ResistFingerprinting(aCallerType)) {
  98     return nullptr;
  99   }
 100
 101   EnsurePluginMimeTypes();
 102
 103   nsString lowerName(aName);
 104   ToLowerCase(lowerName);
 105
 106   nsMimeType* mimeType = FindMimeType(mMimeTypes, lowerName);
 107   if (mimeType) {
 108     aFound = true;
 109     return mimeType;
 110   }
 111   nsMimeType* hiddenType = FindMimeType(mCTPMimeTypes, lowerName);
 112   if (hiddenType) {
 113     nsPluginArray::NotifyHiddenPluginTouched(hiddenType->GetEnabledPlugin());
 114   }
 115
 116   return nullptr;
 117 }
 118
 119 uint32_t nsMimeTypeArray::Length(CallerType aCallerType) {
 120   if (nsContentUtils::ResistFingerprinting(aCallerType)) {
 121     return 0;
 122   }
 123
 124   EnsurePluginMimeTypes();
 125
 126   return mMimeTypes.Length();
 127 }
 128
 129 void nsMimeTypeArray::GetSupportedNames(nsTArray<nsString>& aRetval,
 130                                         CallerType aCallerType) {
 131   if (nsContentUtils::ResistFingerprinting(aCallerType)) {
 132     return;
 133   }
 134
 135   EnsurePluginMimeTypes();
 136
 137   for (uint32_t i = 0; i < mMimeTypes.Length(); ++i) {
 138     aRetval.AppendElement(mMimeTypes[i]->Type());
 139   }
 140 }
 141
 142 void nsMimeTypeArray::EnsurePluginMimeTypes() {
 143   if (!mMimeTypes.IsEmpty() || !mWindow) {
 144     return;
 145   }
 146
 147   RefPtr<Navigator> navigator = mWindow->Navigator();
 148
 149   nsPluginArray* pluginArray = navigator->GetPlugins(IgnoreErrors());
 150   if (!pluginArray) {
 151     return;
 152   }
 153
 154   pluginArray->GetMimeTypes(mMimeTypes);
 155   pluginArray->GetCTPMimeTypes(mCTPMimeTypes);
 156 }
 157
 158 NS_IMPL_CYCLE_COLLECTION_ROOT_NATIVE(nsMimeType, AddRef)
 159 NS_IMPL_CYCLE_COLLECTION_UNROOT_NATIVE(nsMimeType, Release)
 160
 161 NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE(nsMimeType, mWindow, mPluginElement)
 162
 163 nsMimeType::nsMimeType(nsPIDOMWindowInner* aWindow,
 164                        nsPluginElement* aPluginElement, const nsAString& aType,
 165                        const nsAString& aDescription,
 166                        const nsAString& aExtension)
 167     : mWindow(aWindow),
 168       mPluginElement(aPluginElement),
 169       mType(aType),
 170       mDescription(aDescription),
 171       mExtension(aExtension) {
 172   MOZ_ASSERT(aPluginElement);
 173 }
 174
 175 nsMimeType::~nsMimeType() = default;
 176
 177 nsPIDOMWindowInner* nsMimeType::GetParentObject() const {
 178   MOZ_ASSERT(mWindow);
 179   return mWindow;
 180 }
 181
 182 JSObject* nsMimeType::WrapObject(JSContext* aCx,
 183                                  JS::Handle<JSObject*> aGivenProto) {
 184   return MimeType_Binding::Wrap(aCx, this, aGivenProto);
 185 }
 186
 187 void nsMimeType::GetDescription(nsString& aRetval) const {
 188   aRetval = mDescription;
 189 }
 190
 191 nsPluginElement* nsMimeType::GetEnabledPlugin() const {
 192   // mPluginElement might be null if we got unlinked but are still somehow being
 193   // called into.
 194   if (!mPluginElement || !mPluginElement->PluginTag()->IsEnabled()) {
 195     return nullptr;
 196   }
 197   return mPluginElement;
 198 }
 199
 200 void nsMimeType::GetSuffixes(nsString& aRetval) const { aRetval = mExtension; }
 201
 202 void nsMimeType::GetType(nsString& aRetval) const { aRetval = mType; }