import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo

layout/style/FontFaceSetIterator.cpp

@@ -0,0 +1,80 @@
+/* -*- 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 "mozilla/dom/FontFaceSetIterator.h"
+
+namespace mozilla {
+namespace dom {
+
+NS_IMPL_CYCLE_COLLECTION(FontFaceSetIterator, mFontFaceSet)
+
+NS_IMPL_CYCLE_COLLECTION_ROOT_NATIVE(FontFaceSetIterator, AddRef)
+NS_IMPL_CYCLE_COLLECTION_UNROOT_NATIVE(FontFaceSetIterator, Release)
+
+FontFaceSetIterator::FontFaceSetIterator(FontFaceSet* aFontFaceSet,
+                                         bool aIsKeyAndValue)
+  : mFontFaceSet(aFontFaceSet)
+  , mNextIndex(0)
+  , mIsKeyAndValue(aIsKeyAndValue)
+{
+  MOZ_COUNT_CTOR(FontFaceSetIterator);
+}
+
+FontFaceSetIterator::~FontFaceSetIterator()
+{
+  MOZ_COUNT_DTOR(FontFaceSetIterator);
+}
+
+bool
+FontFaceSetIterator::WrapObject(JSContext* aCx,
+                                JS::Handle<JSObject*> aGivenProto,
+                                JS::MutableHandle<JSObject*> aReflector)
+{
+  return FontFaceSetIteratorBinding::Wrap(aCx, this, aGivenProto, aReflector);
+}
+
+void
+FontFaceSetIterator::Next(JSContext* aCx, FontFaceSetIteratorResult& aResult,
+                          ErrorResult& aRv)
+{
+  if (!mFontFaceSet) {
+    aResult.mDone = true;
+    return;
+  }
+
+  FontFace* face = mFontFaceSet->GetFontFaceAt(mNextIndex++);
+
+  if (!face) {
+    aResult.mValue.setUndefined();
+    aResult.mDone = true;
+    mFontFaceSet = nullptr;
+    return;
+  }
+
+  JS::Rooted<JS::Value> value(aCx);
+  if (!ToJSValue(aCx, face, &value)) {
+    aRv.Throw(NS_ERROR_FAILURE);
+    return;
+  }
+
+  if (mIsKeyAndValue) {
+    JS::AutoValueArray<2> values(aCx);
+    values[0].set(value);
+    values[1].set(value);
+
+    JS::Rooted<JSObject*> array(aCx);
+    array = JS_NewArrayObject(aCx, values);
+    if (array) {
+      aResult.mValue.setObject(*array);
+    }
+  } else {
+    aResult.mValue = value;
+  }
+
+  aResult.mDone = false;
+}
+
+} // namespace dom
+} // namespace mozilla