diff -r 000000000000 -r 6474c204b198 dom/base/nsPluginArray.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dom/base/nsPluginArray.cpp	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,492 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* 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 "nsPluginArray.h"
+
+#include "mozilla/Preferences.h"
+#include "mozilla/dom/PluginArrayBinding.h"
+#include "mozilla/dom/PluginBinding.h"
+
+#include "nsCharSeparatedTokenizer.h"
+#include "nsMimeTypeArray.h"
+#include "Navigator.h"
+#include "nsIDocShell.h"
+#include "nsIWebNavigation.h"
+#include "nsPluginHost.h"
+#include "nsPluginTags.h"
+#include "nsIObserverService.h"
+#include "nsIWeakReference.h"
+#include "mozilla/Services.h"
+#include "nsIInterfaceRequestorUtils.h"
+
+using namespace mozilla;
+using namespace mozilla::dom;
+
+nsPluginArray::nsPluginArray(nsPIDOMWindow* aWindow)
+  : mWindow(aWindow)
+{
+  SetIsDOMBinding();
+}
+
+void
+nsPluginArray::Init()
+{
+  nsCOMPtr<nsIObserverService> obsService =
+    mozilla::services::GetObserverService();
+  if (obsService) {
+    obsService->AddObserver(this, "plugin-info-updated", true);
+  }
+}
+
+nsPluginArray::~nsPluginArray()
+{
+}
+
+nsPIDOMWindow*
+nsPluginArray::GetParentObject() const
+{
+  MOZ_ASSERT(mWindow);
+  return mWindow;
+}
+
+JSObject*
+nsPluginArray::WrapObject(JSContext* aCx)
+{
+  return PluginArrayBinding::Wrap(aCx, this);
+}
+
+NS_IMPL_CYCLE_COLLECTING_ADDREF(nsPluginArray)
+NS_IMPL_CYCLE_COLLECTING_RELEASE(nsPluginArray)
+NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(nsPluginArray)
+  NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
+  NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIObserver)
+  NS_INTERFACE_MAP_ENTRY(nsIObserver)
+  NS_INTERFACE_MAP_ENTRY(nsISupportsWeakReference)
+NS_INTERFACE_MAP_END
+
+NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE_3(nsPluginArray,
+                                        mWindow,
+                                        mPlugins,
+                                        mHiddenPlugins)
+
+static void
+GetPluginMimeTypes(const nsTArray<nsRefPtr<nsPluginElement> >& aPlugins,
+                   nsTArray<nsRefPtr<nsMimeType> >& aMimeTypes)
+{
+  for (uint32_t i = 0; i < aPlugins.Length(); ++i) {
+    nsPluginElement *plugin = aPlugins[i];
+    aMimeTypes.AppendElements(plugin->MimeTypes());
+  }
+}
+
+void
+nsPluginArray::GetMimeTypes(nsTArray<nsRefPtr<nsMimeType> >& aMimeTypes,
+                            nsTArray<nsRefPtr<nsMimeType> >& aHiddenMimeTypes)
+{
+  aMimeTypes.Clear();
+  aHiddenMimeTypes.Clear();
+
+  if (!AllowPlugins()) {
+    return;
+  }
+
+  EnsurePlugins();
+
+  GetPluginMimeTypes(mPlugins, aMimeTypes);
+  GetPluginMimeTypes(mHiddenPlugins, aHiddenMimeTypes);
+}
+
+nsPluginElement*
+nsPluginArray::Item(uint32_t aIndex)
+{
+  bool unused;
+  return IndexedGetter(aIndex, unused);
+}
+
+nsPluginElement*
+nsPluginArray::NamedItem(const nsAString& aName)
+{
+  bool unused;
+  return NamedGetter(aName, unused);
+}
+
+void
+nsPluginArray::Refresh(bool aReloadDocuments)
+{
+  nsRefPtr<nsPluginHost> pluginHost = nsPluginHost::GetInst();
+
+  if(!AllowPlugins() || !pluginHost) {
+    return;
+  }
+
+  // NS_ERROR_PLUGINS_PLUGINSNOTCHANGED on reloading plugins indicates
+  // that plugins did not change and was not reloaded
+  if (pluginHost->ReloadPlugins() ==
+      NS_ERROR_PLUGINS_PLUGINSNOTCHANGED) {
+    nsTArray<nsRefPtr<nsPluginTag> > newPluginTags;
+    pluginHost->GetPlugins(newPluginTags);
+
+    // Check if the number of plugins we know about are different from
+    // the number of plugin tags the plugin host knows about. If the
+    // lengths are different, we refresh. This is safe because we're
+    // notified for every plugin enabling/disabling event that
+    // happens, and therefore the lengths will be in sync only when
+    // the both arrays contain the same plugin tags (though as
+    // different types).
+    uint32_t pluginCount = mPlugins.Length() + mHiddenPlugins.Length();
+    if (newPluginTags.Length() == pluginCount) {
+      return;
+    }
+  }
+
+  mPlugins.Clear();
+  mHiddenPlugins.Clear();
+
+  nsCOMPtr<nsIDOMNavigator> navigator;
+  mWindow->GetNavigator(getter_AddRefs(navigator));
+
+  if (!navigator) {
+    return;
+  }
+
+  static_cast<mozilla::dom::Navigator*>(navigator.get())->RefreshMIMEArray();
+
+  nsCOMPtr<nsIWebNavigation> webNav = do_GetInterface(mWindow);
+  if (aReloadDocuments && webNav) {
+    webNav->Reload(nsIWebNavigation::LOAD_FLAGS_NONE);
+  }
+}
+
+nsPluginElement*
+nsPluginArray::IndexedGetter(uint32_t aIndex, bool &aFound)
+{
+  aFound = false;
+
+  if (!AllowPlugins()) {
+    return nullptr;
+  }
+
+  EnsurePlugins();
+
+  aFound = aIndex < mPlugins.Length();
+
+  return aFound ? mPlugins[aIndex] : nullptr;
+}
+
+void
+nsPluginArray::Invalidate()
+{
+  nsCOMPtr<nsIObserverService> obsService =
+    mozilla::services::GetObserverService();
+  if (obsService) {
+    obsService->RemoveObserver(this, "plugin-info-updated");
+  }
+}
+
+static nsPluginElement*
+FindPlugin(const nsTArray<nsRefPtr<nsPluginElement> >& aPlugins,
+           const nsAString& aName)
+{
+  for (uint32_t i = 0; i < aPlugins.Length(); ++i) {
+    nsAutoString pluginName;
+    nsPluginElement* plugin = aPlugins[i];
+    plugin->GetName(pluginName);
+
+    if (pluginName.Equals(aName)) {
+      return plugin;
+    }
+  }
+
+  return nullptr;
+}
+
+nsPluginElement*
+nsPluginArray::NamedGetter(const nsAString& aName, bool &aFound)
+{
+  aFound = false;
+
+  if (!AllowPlugins()) {
+    return nullptr;
+  }
+
+  EnsurePlugins();
+
+  nsPluginElement* plugin = FindPlugin(mPlugins, aName);
+  if (!plugin) {
+    plugin = FindPlugin(mHiddenPlugins, aName);
+  }
+
+  aFound = (plugin != nullptr);
+  return plugin;
+}
+
+bool
+nsPluginArray::NameIsEnumerable(const nsAString& aName)
+{
+  return true;
+}
+
+uint32_t
+nsPluginArray::Length()
+{
+  if (!AllowPlugins()) {
+    return 0;
+  }
+
+  EnsurePlugins();
+
+  return mPlugins.Length();
+}
+
+void
+nsPluginArray::GetSupportedNames(unsigned, nsTArray<nsString>& aRetval)
+{
+  aRetval.Clear();
+
+  if (!AllowPlugins()) {
+    return;
+  }
+
+  for (uint32_t i = 0; i < mPlugins.Length(); ++i) {
+    nsAutoString pluginName;
+    mPlugins[i]->GetName(pluginName);
+
+    aRetval.AppendElement(pluginName);
+  }
+}
+
+NS_IMETHODIMP
+nsPluginArray::Observe(nsISupports *aSubject, const char *aTopic,
+                       const char16_t *aData) {
+  if (!nsCRT::strcmp(aTopic, "plugin-info-updated")) {
+    Refresh(false);
+  }
+
+  return NS_OK;
+}
+
+bool
+nsPluginArray::AllowPlugins() const
+{
+  nsCOMPtr<nsIDocShell> docShell = do_GetInterface(mWindow);
+
+  return docShell && docShell->PluginsAllowedInCurrentDoc();
+}
+
+static bool
+HasStringPrefix(const nsCString& str, const nsACString& prefix) {
+  return str.Compare(prefix.BeginReading(), false, prefix.Length()) == 0;
+}
+
+static bool
+IsPluginEnumerable(const nsTArray<nsCString>& enumerableNames,
+                   const nsPluginTag* pluginTag)
+{
+  const nsCString& pluginName = pluginTag->mName;
+
+  const uint32_t length = enumerableNames.Length();
+  for (uint32_t i = 0; i < length; i++) {
+    const nsCString& name = enumerableNames[i];
+    if (HasStringPrefix(pluginName, name)) {
+      return true; // don't hide plugin
+    }
+  }
+
+  return false; // hide plugin!
+}
+
+void
+nsPluginArray::EnsurePlugins()
+{
+  if (!mPlugins.IsEmpty() || !mHiddenPlugins.IsEmpty()) {
+    // We already have an array of plugin elements.
+    return;
+  }
+
+  nsRefPtr<nsPluginHost> pluginHost = nsPluginHost::GetInst();
+  if (!pluginHost) {
+    // We have no plugin host.
+    return;
+  }
+
+  nsTArray<nsRefPtr<nsPluginTag> > pluginTags;
+  pluginHost->GetPlugins(pluginTags);
+
+  nsTArray<nsCString> enumerableNames;
+
+  const nsAdoptingCString& enumerableNamesPref =
+      Preferences::GetCString("plugins.enumerable_names");
+
+  bool disablePluginHiding = !enumerableNamesPref ||
+                             enumerableNamesPref.EqualsLiteral("*");
+
+  if (!disablePluginHiding) {
+    nsCCharSeparatedTokenizer tokens(enumerableNamesPref, ',');
+    while (tokens.hasMoreTokens()) {
+      const nsCSubstring& token = tokens.nextToken();
+      if (!token.IsEmpty()) {
+        enumerableNames.AppendElement(token);
+      }
+    }
+  }
+
+  // need to wrap each of these with a nsPluginElement, which is
+  // scriptable.
+  for (uint32_t i = 0; i < pluginTags.Length(); ++i) {
+    nsPluginTag* pluginTag = pluginTags[i];
+
+    // Add the plugin to the list of hidden plugins or non-hidden plugins?
+    nsTArray<nsRefPtr<nsPluginElement> >& pluginArray =
+        (disablePluginHiding || IsPluginEnumerable(enumerableNames, pluginTag))
+        ? mPlugins
+        : mHiddenPlugins;
+
+    pluginArray.AppendElement(new nsPluginElement(mWindow, pluginTag));
+  }
+}
+
+// nsPluginElement implementation.
+
+NS_IMPL_CYCLE_COLLECTING_ADDREF(nsPluginElement)
+NS_IMPL_CYCLE_COLLECTING_RELEASE(nsPluginElement)
+NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(nsPluginElement)
+  NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
+  NS_INTERFACE_MAP_ENTRY(nsISupports)
+NS_INTERFACE_MAP_END
+
+NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE_2(nsPluginElement, mWindow, mMimeTypes)
+
+nsPluginElement::nsPluginElement(nsPIDOMWindow* aWindow,
+                                 nsPluginTag* aPluginTag)
+  : mWindow(aWindow),
+    mPluginTag(aPluginTag)
+{
+  SetIsDOMBinding();
+}
+
+nsPIDOMWindow*
+nsPluginElement::GetParentObject() const
+{
+  MOZ_ASSERT(mWindow);
+  return mWindow;
+}
+
+JSObject*
+nsPluginElement::WrapObject(JSContext* aCx)
+{
+  return PluginBinding::Wrap(aCx, this);
+}
+
+void
+nsPluginElement::GetDescription(nsString& retval) const
+{
+  CopyUTF8toUTF16(mPluginTag->mDescription, retval);
+}
+
+void
+nsPluginElement::GetFilename(nsString& retval) const
+{
+  CopyUTF8toUTF16(mPluginTag->mFileName, retval);
+}
+
+void
+nsPluginElement::GetVersion(nsString& retval) const
+{
+  CopyUTF8toUTF16(mPluginTag->mVersion, retval);
+}
+
+void
+nsPluginElement::GetName(nsString& retval) const
+{
+  CopyUTF8toUTF16(mPluginTag->mName, retval);
+}
+
+nsMimeType*
+nsPluginElement::Item(uint32_t aIndex)
+{
+  EnsurePluginMimeTypes();
+
+  return mMimeTypes.SafeElementAt(aIndex);
+}
+
+nsMimeType*
+nsPluginElement::NamedItem(const nsAString& aName)
+{
+  bool unused;
+  return NamedGetter(aName, unused);
+}
+
+nsMimeType*
+nsPluginElement::IndexedGetter(uint32_t aIndex, bool &aFound)
+{
+  EnsurePluginMimeTypes();
+
+  aFound = aIndex < mMimeTypes.Length();
+
+  return aFound ? mMimeTypes[aIndex] : nullptr;
+}
+
+nsMimeType*
+nsPluginElement::NamedGetter(const nsAString& aName, bool &aFound)
+{
+  EnsurePluginMimeTypes();
+
+  aFound = false;
+
+  for (uint32_t i = 0; i < mMimeTypes.Length(); ++i) {
+    if (mMimeTypes[i]->Type().Equals(aName)) {
+      aFound = true;
+
+      return mMimeTypes[i];
+    }
+  }
+
+  return nullptr;
+}
+
+bool
+nsPluginElement::NameIsEnumerable(const nsAString& aName)
+{
+  return true;
+}
+
+uint32_t
+nsPluginElement::Length()
+{
+  EnsurePluginMimeTypes();
+
+  return mMimeTypes.Length();
+}
+
+void
+nsPluginElement::GetSupportedNames(unsigned, nsTArray<nsString>& retval)
+{
+  EnsurePluginMimeTypes();
+
+  for (uint32_t i = 0; i < mMimeTypes.Length(); ++i) {
+    retval.AppendElement(mMimeTypes[i]->Type());
+  }
+}
+
+nsTArray<nsRefPtr<nsMimeType> >&
+nsPluginElement::MimeTypes()
+{
+  EnsurePluginMimeTypes();
+
+  return mMimeTypes;
+}
+
+void
+nsPluginElement::EnsurePluginMimeTypes()
+{
+  if (!mMimeTypes.IsEmpty()) {
+    return;
+  }
+
+  for (uint32_t i = 0; i < mPluginTag->mMimeTypes.Length(); ++i) {
+    NS_ConvertUTF8toUTF16 type(mPluginTag->mMimeTypes[i]);
+    mMimeTypes.AppendElement(new nsMimeType(mWindow, this, i, type));
+  }
+}