1 files changed, 77 insertions, 0 deletions
diff --git a/gfx/layers/ScrollableLayerGuid.cpp b/gfx/layers/ScrollableLayerGuid.cpp
new file mode 100644
index 0000000000..914a8ad124
--- /dev/null
+++ b/gfx/layers/ScrollableLayerGuid.cpp
@@ -0,0 +1,77 @@
+/* -*- 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/. */
+
+#include "ScrollableLayerGuid.h"
+
+#include <ostream>
+#include "mozilla/HashFunctions.h"  // for HashGeneric
+#include "nsPrintfCString.h"        // for nsPrintfCString
+
+namespace mozilla {
+namespace layers {
+
+ScrollableLayerGuid::ScrollableLayerGuid()
+    : mLayersId{0}, mPresShellId(0), mScrollId(0) {}
+
+ScrollableLayerGuid::ScrollableLayerGuid(LayersId aLayersId,
+                                         uint32_t aPresShellId,
+                                         ViewID aScrollId)
+    : mLayersId(aLayersId), mPresShellId(aPresShellId), mScrollId(aScrollId) {}
+
+bool ScrollableLayerGuid::operator==(const ScrollableLayerGuid& other) const {
+  return mLayersId == other.mLayersId && mPresShellId == other.mPresShellId &&
+         mScrollId == other.mScrollId;
+}
+
+bool ScrollableLayerGuid::operator!=(const ScrollableLayerGuid& other) const {
+  return !(*this == other);
+}
+
+bool ScrollableLayerGuid::operator<(const ScrollableLayerGuid& other) const {
+  if (mLayersId < other.mLayersId) {
+    return true;
+  }
+  if (mLayersId == other.mLayersId) {
+    if (mPresShellId < other.mPresShellId) {
+      return true;
+    }
+    if (mPresShellId == other.mPresShellId) {
+      return mScrollId < other.mScrollId;
+    }
+  }
+  return false;
+}
+
+std::ostream& operator<<(std::ostream& aOut, const ScrollableLayerGuid& aGuid) {
+  return aOut << nsPrintfCString("{ l=0x%" PRIx64 ", p=%u, v=%" PRIu64 " }",
+                                 uint64_t(aGuid.mLayersId), aGuid.mPresShellId,
+                                 aGuid.mScrollId)
+                     .get();
+}
+
+bool ScrollableLayerGuid::EqualsIgnoringPresShell(
+    const ScrollableLayerGuid& aA, const ScrollableLayerGuid& aB) {
+  return aA.mLayersId == aB.mLayersId && aA.mScrollId == aB.mScrollId;
+}
+
+std::size_t ScrollableLayerGuid::HashFn::operator()(
+    const ScrollableLayerGuid& aGuid) const {
+  return HashGeneric(uint64_t(aGuid.mLayersId), aGuid.mPresShellId,
+                     aGuid.mScrollId);
+}
+
+std::size_t ScrollableLayerGuid::HashIgnoringPresShellFn::operator()(
+    const ScrollableLayerGuid& aGuid) const {
+  return HashGeneric(uint64_t(aGuid.mLayersId), aGuid.mScrollId);
+}
+
+bool ScrollableLayerGuid::EqualIgnoringPresShellFn::operator()(
+    const ScrollableLayerGuid& lhs, const ScrollableLayerGuid& rhs) const {
+  return EqualsIgnoringPresShell(lhs, rhs);
+}
+
+}  // namespace layers
+}  // namespace mozilla