1 files changed, 66 insertions, 0 deletions
diff --git a/gfx/layers/apz/testutil/APZTestData.cpp b/gfx/layers/apz/testutil/APZTestData.cpp
new file mode 100644
index 000000000..3c9440b64
--- /dev/null
+++ b/gfx/layers/apz/testutil/APZTestData.cpp
@@ -0,0 +1,66 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* 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 "APZTestData.h"
+#include "mozilla/dom/APZTestDataBinding.h"
+#include "mozilla/dom/ToJSValue.h"
+#include "nsString.h"
+
+namespace mozilla {
+namespace layers {
+
+struct APZTestDataToJSConverter {
+  template <typename Key, typename Value, typename KeyValuePair>
+  static void ConvertMap(const std::map<Key, Value>& aFrom,
+                               dom::Sequence<KeyValuePair>& aOutTo,
+                               void (*aElementConverter)(const Key&, const Value&, KeyValuePair&)) {
+    for (auto it = aFrom.begin(); it != aFrom.end(); ++it) {
+      aOutTo.AppendElement(fallible);
+      aElementConverter(it->first, it->second, aOutTo.LastElement());
+    }
+  }
+
+  static void ConvertAPZTestData(const APZTestData& aFrom,
+                                 dom::APZTestData& aOutTo) {
+    ConvertMap(aFrom.mPaints, aOutTo.mPaints.Construct(), ConvertBucket);
+    ConvertMap(aFrom.mRepaintRequests, aOutTo.mRepaintRequests.Construct(), ConvertBucket);
+  }
+
+  static void ConvertBucket(const SequenceNumber& aKey,
+                            const APZTestData::Bucket& aValue,
+                            dom::APZBucket& aOutKeyValuePair) {
+    aOutKeyValuePair.mSequenceNumber.Construct() = aKey;
+    ConvertMap(aValue, aOutKeyValuePair.mScrollFrames.Construct(), ConvertScrollFrameData);
+  }
+
+  static void ConvertScrollFrameData(const APZTestData::ViewID& aKey,
+                                     const APZTestData::ScrollFrameData& aValue,
+                                     dom::ScrollFrameData& aOutKeyValuePair) {
+    aOutKeyValuePair.mScrollId.Construct() = aKey;
+    ConvertMap(aValue, aOutKeyValuePair.mEntries.Construct(), ConvertEntry);
+  }
+
+  static void ConvertEntry(const std::string& aKey,
+                           const std::string& aValue,
+                           dom::ScrollFrameDataEntry& aOutKeyValuePair) {
+    ConvertString(aKey, aOutKeyValuePair.mKey.Construct());
+    ConvertString(aValue, aOutKeyValuePair.mValue.Construct());
+  }
+
+  static void ConvertString(const std::string& aFrom, nsString& aOutTo) {
+    aOutTo = NS_ConvertUTF8toUTF16(aFrom.c_str(), aFrom.size());
+  }
+};
+
+bool
+APZTestData::ToJS(JS::MutableHandleValue aOutValue, JSContext* aContext) const
+{
+  dom::APZTestData result;
+  APZTestDataToJSConverter::ConvertAPZTestData(*this, result);
+  return dom::ToJSValue(aContext, result, aOutValue);
+}
+
+} // namespace layers
+} // namespace mozilla