1 files changed, 134 insertions, 0 deletions
diff --git a/dom/base/nsPluginArray.h b/dom/base/nsPluginArray.h
new file mode 100644
index 0000000000..7b1cc65440
--- /dev/null
+++ b/dom/base/nsPluginArray.h
@@ -0,0 +1,134 @@
+/* -*- 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/. */
+
+#ifndef nsPluginArray_h___
+#define nsPluginArray_h___
+
+#include "nsWeakReference.h"
+#include "nsWrapperCache.h"
+#include "nsCOMPtr.h"
+#include "nsString.h"
+#include "nsTArray.h"
+#include "mozilla/Array.h"
+
+class nsPIDOMWindowInner;
+class nsPluginElement;
+class nsMimeTypeArray;
+class nsMimeType;
+
+/**
+ * Array class backing HTML's navigator.plugins.  This always holds references
+ * to the hard-coded set of PDF plugins defined by HTML but it only consults
+ * them if "pdfjs.disabled" is false.  There is never more than one of these
+ * per DOM window.
+ */
+class nsPluginArray final : public nsSupportsWeakReference,
+                            public nsWrapperCache {
+ public:
+  NS_DECL_CYCLE_COLLECTING_ISUPPORTS
+  NS_DECL_CYCLE_COLLECTION_WRAPPERCACHE_CLASS(nsPluginArray)
+
+  explicit nsPluginArray(nsPIDOMWindowInner* aWindow);
+  nsPIDOMWindowInner* GetParentObject() const;
+  virtual JSObject* WrapObject(JSContext* aCx,
+                               JS::Handle<JSObject*> aGivenProto) override;
+
+  nsMimeTypeArray* MimeTypeArray() { return mMimeTypeArray; }
+
+  // PluginArray WebIDL methods
+  uint32_t Length() { return ForceNoPlugins() ? 0 : ArrayLength(mPlugins); }
+
+  nsPluginElement* Item(uint32_t aIndex) {
+    bool unused;
+    return IndexedGetter(aIndex, unused);
+  }
+
+  nsPluginElement* NamedItem(const nsAString& aName) {
+    bool unused;
+    return NamedGetter(aName, unused);
+  }
+
+  nsPluginElement* IndexedGetter(uint32_t aIndex, bool& aFound);
+
+  nsPluginElement* NamedGetter(const nsAString& aName, bool& aFound);
+
+  void GetSupportedNames(nsTArray<nsString>& aRetval);
+
+  void Refresh() {}
+
+ private:
+  virtual ~nsPluginArray();
+
+  bool ForceNoPlugins();
+
+  RefPtr<nsMimeTypeArray> mMimeTypeArray;
+  nsCOMPtr<nsPIDOMWindowInner> mWindow;
+  mozilla::Array<RefPtr<nsPluginElement>, 5> mPlugins;
+};
+
+/**
+ * Plugin class backing entries in HTML's navigator.plugins array.  There is
+ * a fixed set of these, as defined by HTML.
+ */
+class nsPluginElement final : public nsISupports, public nsWrapperCache {
+ public:
+  NS_DECL_CYCLE_COLLECTING_ISUPPORTS
+  NS_DECL_CYCLE_COLLECTION_WRAPPERCACHE_CLASS(nsPluginElement)
+
+  explicit nsPluginElement(nsPluginArray* aPluginArray,
+                           nsPIDOMWindowInner* aWindow, const nsAString& aName);
+
+  nsPluginArray* GetParentObject() const;
+
+  virtual JSObject* WrapObject(JSContext* aCx,
+                               JS::Handle<JSObject*> aGivenProto) override;
+
+  // Plugin WebIDL methods
+  void GetDescription(nsString& retval) const { retval = kDescription; }
+
+  void GetFilename(nsString& retval) const { retval = kFilename; }
+
+  void GetName(nsString& retval) const { retval = mName; }
+  const nsString& Name() const { return mName; }
+
+  nsMimeType* Item(uint32_t index) {
+    bool unused;
+    return IndexedGetter(index, unused);
+  }
+
+  nsMimeType* NamedItem(const nsAString& name) {
+    bool unused;
+    return NamedGetter(name, unused);
+  }
+
+  uint32_t Length();
+
+  nsMimeType* IndexedGetter(uint32_t index, bool& found);
+
+  nsMimeType* NamedGetter(const nsAString& name, bool& found);
+
+  void GetSupportedNames(nsTArray<nsString>& retval);
+
+ protected:
+  virtual ~nsPluginElement() = default;
+
+  nsMimeTypeArray* MimeTypeArray() { return mPluginArray->MimeTypeArray(); }
+
+  static constexpr nsLiteralString kDescription =
+      u"Portable Document Format"_ns;
+  static constexpr nsLiteralString kFilename = u"internal-pdf-viewer"_ns;
+
+  // Note that this creates an explicit reference cycle:
+  //
+  // nsPluginElement -> nsPluginArray -> nsPluginElement
+  //
+  // We rely on the cycle collector to break this cycle.
+  RefPtr<nsPluginArray> mPluginArray;
+  nsCOMPtr<nsPIDOMWindowInner> mWindow;
+  nsString mName;
+};
+
+#endif /* nsPluginArray_h___ */