1 files changed, 72 insertions, 0 deletions
diff --git a/layout/style/nsFontFaceLoader.h b/layout/style/nsFontFaceLoader.h
new file mode 100644
index 0000000000..cf77e465f6
--- /dev/null
+++ b/layout/style/nsFontFaceLoader.h
@@ -0,0 +1,72 @@
+/* -*- 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/. */
+
+/* code for loading in @font-face defined font data */
+
+#ifndef nsFontFaceLoader_h_
+#define nsFontFaceLoader_h_
+
+#include "mozilla/Attributes.h"
+#include "mozilla/TimeStamp.h"
+#include "mozilla/dom/FontFaceSet.h"
+#include "nsCOMPtr.h"
+#include "nsIFontLoadCompleteCallback.h"
+#include "nsIStreamLoader.h"
+#include "nsIChannel.h"
+#include "nsIRequestObserver.h"
+#include "gfxUserFontSet.h"
+#include "nsHashKeys.h"
+#include "nsTHashtable.h"
+
+class nsIPrincipal;
+
+class nsFontFaceLoader final : public nsIStreamLoaderObserver,
+                               public nsIRequestObserver,
+                               public nsIFontLoadCompleteCallback {
+ public:
+  nsFontFaceLoader(gfxUserFontEntry* aFontToLoad, nsIURI* aFontURI,
+                   mozilla::dom::FontFaceSet* aFontFaceSet,
+                   nsIChannel* aChannel);
+
+  NS_DECL_ISUPPORTS
+  NS_DECL_NSISTREAMLOADEROBSERVER
+  NS_DECL_NSIREQUESTOBSERVER
+
+  // cancel the load and remove its reference to mFontFaceSet
+  void Cancel();
+
+  void DropChannel() { mChannel = nullptr; }
+
+  void StartedLoading(nsIStreamLoader* aStreamLoader);
+
+  static void LoadTimerCallback(nsITimer* aTimer, void* aClosure);
+
+  gfxUserFontEntry* GetUserFontEntry() const { return mUserFontEntry; }
+
+  // Called by the gfxUserFontEntry once it has finished the platform font
+  // loading.
+  NS_IMETHODIMP FontLoadComplete() final;
+
+ protected:
+  virtual ~nsFontFaceLoader();
+
+  // helper method for determining the font-display value
+  mozilla::StyleFontDisplay GetFontDisplay();
+
+ private:
+  RefPtr<gfxUserFontEntry> mUserFontEntry;
+  nsCOMPtr<nsIURI> mFontURI;
+  // Cleared in FontFaceSet::~FontFaceSet, and on cancelation and such too.
+  mozilla::dom::FontFaceSet* MOZ_NON_OWNING_REF mFontFaceSet;
+  nsCOMPtr<nsIChannel> mChannel;
+  nsCOMPtr<nsITimer> mLoadTimer;
+  mozilla::TimeStamp mStartTime;
+  nsIStreamLoader* mStreamLoader;
+  bool mInStreamComplete = false;
+  bool mInLoadTimerCallback = false;
+};
+
+#endif /* !defined(nsFontFaceLoader_h_) */