1 files changed, 67 insertions, 0 deletions
diff --git a/dom/flex/Flex.cpp b/dom/flex/Flex.cpp
new file mode 100644
index 0000000000..898e81d4f5
--- /dev/null
+++ b/dom/flex/Flex.cpp
@@ -0,0 +1,67 @@
+/* -*- 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 "Flex.h"
+
+#include "FlexLineValues.h"
+#include "mozilla/dom/Element.h"
+#include "mozilla/dom/FlexBinding.h"
+#include "nsFlexContainerFrame.h"
+
+namespace mozilla::dom {
+
+NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE(Flex, mParent, mLines)
+NS_IMPL_CYCLE_COLLECTING_ADDREF(Flex)
+NS_IMPL_CYCLE_COLLECTING_RELEASE(Flex)
+NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(Flex)
+  NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
+  NS_INTERFACE_MAP_ENTRY(nsISupports)
+NS_INTERFACE_MAP_END
+
+Flex::Flex(Element* aParent, nsFlexContainerFrame* aFrame) : mParent(aParent) {
+  MOZ_ASSERT(aFrame,
+             "Should never be instantiated with a null nsFlexContainerFrame");
+
+  // Eagerly create property values from aFrame, because we're not
+  // going to keep it around.
+  const ComputedFlexContainerInfo* containerInfo =
+      aFrame->GetFlexContainerInfo();
+  if (!containerInfo) {
+    // It's weird but possible to fail to get a ComputedFlexContainerInfo
+    // structure. Assign sensible default values.
+    mMainAxisDirection = FlexPhysicalDirection::Horizontal_lr;
+    mCrossAxisDirection = FlexPhysicalDirection::Vertical_tb;
+    return;
+  }
+  mLines.SetLength(containerInfo->mLines.Length());
+  uint32_t index = 0;
+  for (auto&& l : containerInfo->mLines) {
+    FlexLineValues* line = new FlexLineValues(this, &l);
+    mLines.ElementAt(index) = line;
+    index++;
+  }
+
+  mMainAxisDirection = containerInfo->mMainAxisDirection;
+  mCrossAxisDirection = containerInfo->mCrossAxisDirection;
+}
+
+JSObject* Flex::WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto) {
+  return Flex_Binding::Wrap(aCx, this, aGivenProto);
+}
+
+void Flex::GetLines(nsTArray<RefPtr<FlexLineValues>>& aResult) {
+  aResult.AppendElements(mLines);
+}
+
+FlexPhysicalDirection Flex::MainAxisDirection() const {
+  return mMainAxisDirection;
+}
+
+FlexPhysicalDirection Flex::CrossAxisDirection() const {
+  return mCrossAxisDirection;
+}
+
+}  // namespace mozilla::dom