1 files changed, 96 insertions, 0 deletions
diff --git a/dom/flex/FlexItemValues.cpp b/dom/flex/FlexItemValues.cpp
new file mode 100644
index 0000000000..9a9be8412f
--- /dev/null
+++ b/dom/flex/FlexItemValues.cpp
@@ -0,0 +1,96 @@
+/* -*- 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 "FlexItemValues.h"
+
+#include "mozilla/dom/DOMRect.h"
+#include "mozilla/dom/FlexBinding.h"
+#include "mozilla/dom/FlexLineValues.h"
+#include "nsFlexContainerFrame.h"
+
+namespace mozilla::dom {
+
+NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE(FlexItemValues, mParent, mNode,
+                                      mFrameRect)
+NS_IMPL_CYCLE_COLLECTING_ADDREF(FlexItemValues)
+NS_IMPL_CYCLE_COLLECTING_RELEASE(FlexItemValues)
+NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(FlexItemValues)
+  NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
+  NS_INTERFACE_MAP_ENTRY(nsISupports)
+NS_INTERFACE_MAP_END
+
+/**
+ * Utility function to convert a nscoord size to CSS pixel values, with
+ * graceful treatment of NS_UNCONSTRAINEDSIZE (which this function converts to
+ * the double "positive infinity" value).
+ *
+ * This function is suitable for converting quantities that are expected to
+ * sometimes legitimately (rather than arbitrarily/accidentally) contain the
+ * sentinel value NS_UNCONSTRAINEDSIZE -- e.g. to handle "max-width: none".
+ */
+static double ToPossiblyUnconstrainedPixels(nscoord aSize) {
+  if (aSize == NS_UNCONSTRAINEDSIZE) {
+    return std::numeric_limits<double>::infinity();
+  }
+  return nsPresContext::AppUnitsToDoubleCSSPixels(aSize);
+}
+
+FlexItemValues::FlexItemValues(FlexLineValues* aParent,
+                               const ComputedFlexItemInfo* aItem)
+    : mParent(aParent) {
+  MOZ_ASSERT(aItem,
+             "Should never be instantiated with a null ComputedFlexLineInfo.");
+
+  // Eagerly copy values from aItem, because we're not
+  // going to keep it around.
+  mNode = aItem->mNode;
+
+  // Since mNode might be null, we associate the mFrameRect with
+  // our parent.
+  mFrameRect = new DOMRectReadOnly(
+      mParent, nsPresContext::AppUnitsToDoubleCSSPixels(aItem->mFrameRect.X()),
+      nsPresContext::AppUnitsToDoubleCSSPixels(aItem->mFrameRect.Y()),
+      nsPresContext::AppUnitsToDoubleCSSPixels(aItem->mFrameRect.Width()),
+      nsPresContext::AppUnitsToDoubleCSSPixels(aItem->mFrameRect.Height()));
+
+  // Convert app unit sizes to css pixel sizes.
+  mMainBaseSize =
+      nsPresContext::AppUnitsToDoubleCSSPixels(aItem->mMainBaseSize);
+  mMainDeltaSize =
+      nsPresContext::AppUnitsToDoubleCSSPixels(aItem->mMainDeltaSize);
+  mMainMinSize = nsPresContext::AppUnitsToDoubleCSSPixels(aItem->mMainMinSize);
+  mMainMaxSize = ToPossiblyUnconstrainedPixels(aItem->mMainMaxSize);
+  mCrossMinSize =
+      nsPresContext::AppUnitsToDoubleCSSPixels(aItem->mCrossMinSize);
+  mCrossMaxSize = ToPossiblyUnconstrainedPixels(aItem->mCrossMaxSize);
+
+  mClampState = aItem->mClampState;
+}
+
+JSObject* FlexItemValues::WrapObject(JSContext* aCx,
+                                     JS::Handle<JSObject*> aGivenProto) {
+  return FlexItemValues_Binding::Wrap(aCx, this, aGivenProto);
+}
+
+nsINode* FlexItemValues::GetNode() const { return mNode; }
+
+DOMRectReadOnly* FlexItemValues::FrameRect() const { return mFrameRect; }
+
+double FlexItemValues::MainBaseSize() const { return mMainBaseSize; }
+
+double FlexItemValues::MainDeltaSize() const { return mMainDeltaSize; }
+
+double FlexItemValues::MainMinSize() const { return mMainMinSize; }
+
+double FlexItemValues::MainMaxSize() const { return mMainMaxSize; }
+
+double FlexItemValues::CrossMinSize() const { return mCrossMinSize; }
+
+double FlexItemValues::CrossMaxSize() const { return mCrossMaxSize; }
+
+FlexItemClampState FlexItemValues::ClampState() const { return mClampState; }
+
+}  // namespace mozilla::dom