Adding upstream version 86.0.1.upstream/86.0.1upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 87 insertions, 0 deletions

diff --git a/dom/smil/SMILTargetIdentifier.h b/dom/smil/SMILTargetIdentifier.h
new file mode 100644
index 0000000000..14a2ee3152
--- /dev/null
+++ b/dom/smil/SMILTargetIdentifier.h
@@ -0,0 +1,87 @@
+/* -*- 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 DOM_SMIL_SMILTARGETIDENTIFIER_H_
+#define DOM_SMIL_SMILTARGETIDENTIFIER_H_
+
+// XXX Avoid including this here by moving function bodies to the cpp file
+#include "nsAtom.h"
+#include "nsIContent.h"
+#include "mozilla/dom/Element.h"
+
+class nsIContent;
+
+namespace mozilla {
+namespace dom {
+class Element;
+}
+
+/**
+ * Struct: SMILTargetIdentifier
+ *
+ * Tuple of: { Animated Element, Attribute Name }
+ *
+ * Used in SMILAnimationController as hash key for mapping an animation
+ * target to the SMILCompositor for that target.
+ *
+ * NOTE: Need a nsRefPtr for the element & attribute name, because
+ * SMILAnimationController retain its hash table for one sample into the
+ * future, and we need to make sure their target isn't deleted in that time.
+ */
+
+struct SMILTargetIdentifier {
+  SMILTargetIdentifier()
+      : mElement(nullptr),
+        mAttributeName(nullptr),
+        mAttributeNamespaceID(kNameSpaceID_Unknown) {}
+
+  inline bool Equals(const SMILTargetIdentifier& aOther) const {
+    return (aOther.mElement == mElement &&
+            aOther.mAttributeName == mAttributeName &&
+            aOther.mAttributeNamespaceID == mAttributeNamespaceID);
+  }
+
+  RefPtr<mozilla::dom::Element> mElement;
+  RefPtr<nsAtom> mAttributeName;
+  int32_t mAttributeNamespaceID;
+};
+
+/**
+ * Class: SMILWeakTargetIdentifier
+ *
+ * Version of the above struct that uses non-owning pointers.  These are kept
+ * private, to ensure that they aren't ever dereferenced (or used at all,
+ * outside of Equals()).
+ *
+ * This is solely for comparisons to determine if a target has changed
+ * from one sample to the next.
+ */
+class SMILWeakTargetIdentifier {
+ public:
+  // Trivial constructor
+  SMILWeakTargetIdentifier() : mElement(nullptr), mAttributeName(nullptr) {}
+
+  // Allow us to update a weak identifier to match a given non-weak identifier
+  SMILWeakTargetIdentifier& operator=(const SMILTargetIdentifier& aOther) {
+    mElement = aOther.mElement;
+    mAttributeName = aOther.mAttributeName;
+    return *this;
+  }
+
+  // Allow for comparison vs. non-weak identifier
+  inline bool Equals(const SMILTargetIdentifier& aOther) const {
+    return (aOther.mElement == mElement &&
+            aOther.mAttributeName == mAttributeName);
+  }
+
+ private:
+  const nsIContent* mElement;
+  const nsAtom* mAttributeName;
+};
+
+}  // namespace mozilla
+
+#endif  // DOM_SMIL_SMILTARGETIDENTIFIER_H_