Bug 1725942 - Part 1: Add ContentPrincipalInfoHashKey r=bholley

Differential Revision: https://phabricator.services.mozilla.com/D126241

caps/ContentPrincipalInfoHashKey.h

@@ -0,0 +1,56 @@
+/* -*- 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 CAPS_PRINCIPALHASHKEY_H_
+#define CAPS_PRINCIPALHASHKEY_H_
+
+#include "mozilla/ipc/PBackgroundSharedTypes.h"
+#include "PLDHashTable.h"
+#include "nsHashKeys.h"
+#include "nsUnicharUtils.h"
+
+namespace mozilla {
+
+class ContentPrincipalInfoHashKey : public PLDHashEntryHdr {
+ public:
+  using KeyType = const ipc::ContentPrincipalInfo&;
+  using KeyTypePointer = const ipc::ContentPrincipalInfo*;
+
+  explicit ContentPrincipalInfoHashKey(KeyTypePointer aKey)
+      : mPrincipalInfo(*aKey) {
+    MOZ_COUNT_CTOR(ContentPrincipalInfoHashKey);
+  }
+  ContentPrincipalInfoHashKey(ContentPrincipalInfoHashKey&& aOther) noexcept
+      : mPrincipalInfo(aOther.mPrincipalInfo) {
+    MOZ_COUNT_CTOR(ContentPrincipalInfoHashKey);
+  }
+
+  MOZ_COUNTED_DTOR(ContentPrincipalInfoHashKey)
+
+  KeyType GetKey() const { return mPrincipalInfo; }
+
+  bool KeyEquals(KeyTypePointer aKey) const {
+    // Mocks BasePrincipal::FastEquals()
+    return mPrincipalInfo.originNoSuffix() == aKey->originNoSuffix() &&
+           mPrincipalInfo.attrs() == aKey->attrs();
+  }
+
+  static KeyTypePointer KeyToPointer(KeyType aKey) { return &aKey; }
+  static PLDHashNumber HashKey(KeyTypePointer aKey) {
+    nsAutoCString suffix;
+    aKey->attrs().CreateSuffix(suffix);
+    return HashGeneric(HashString(aKey->originNoSuffix()), HashString(suffix));
+  }
+
+  enum { ALLOW_MEMMOVE = true };
+
+ protected:
+  const ipc::ContentPrincipalInfo mPrincipalInfo;
+};
+
+}  // namespace mozilla
+
+#endif  // CAPS_PRINCIPALHASHKEY_H_

caps/moz.build

@@ -31,6 +31,7 @@ EXPORTS += [
 EXPORTS.mozilla = [
     "BasePrincipal.h",
     "ContentPrincipal.h",
+    "ContentPrincipalInfoHashKey.h",
     "ExpandedPrincipal.h",
     "NullPrincipal.h",
     "OriginAttributes.h",