1 files changed, 53 insertions, 0 deletions
diff --git a/intl/components/src/BidiEmbeddingLevel.cpp b/intl/components/src/BidiEmbeddingLevel.cpp
new file mode 100644
index 0000000000..d3ef5da937
--- /dev/null
+++ b/intl/components/src/BidiEmbeddingLevel.cpp
@@ -0,0 +1,53 @@
+/* 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/intl/BidiEmbeddingLevel.h"
+#include "mozilla/Casting.h"
+#include "mozilla/intl/ICU4CGlue.h"
+
+#include "unicode/ubidi.h"
+
+namespace mozilla::intl {
+
+bool BidiEmbeddingLevel::IsDefaultLTR() const {
+  return mValue == UBIDI_DEFAULT_LTR;
+};
+
+bool BidiEmbeddingLevel::IsDefaultRTL() const {
+  return mValue == UBIDI_DEFAULT_RTL;
+};
+
+bool BidiEmbeddingLevel::IsRTL() const {
+  // If the least significant bit is 1, then the embedding level
+  // is right-to-left.
+  // If the least significant bit is 0, then the embedding level
+  // is left-to-right.
+  return (mValue & 0x1) == 1;
+};
+
+bool BidiEmbeddingLevel::IsLTR() const { return !IsRTL(); };
+
+bool BidiEmbeddingLevel::IsSameDirection(BidiEmbeddingLevel aOther) const {
+  return (((mValue ^ aOther) & 1) == 0);
+}
+
+BidiEmbeddingLevel BidiEmbeddingLevel::LTR() { return BidiEmbeddingLevel(0); };
+
+BidiEmbeddingLevel BidiEmbeddingLevel::RTL() { return BidiEmbeddingLevel(1); };
+
+BidiEmbeddingLevel BidiEmbeddingLevel::DefaultLTR() {
+  return BidiEmbeddingLevel(UBIDI_DEFAULT_LTR);
+};
+
+BidiEmbeddingLevel BidiEmbeddingLevel::DefaultRTL() {
+  return BidiEmbeddingLevel(UBIDI_DEFAULT_RTL);
+};
+
+BidiDirection BidiEmbeddingLevel::Direction() {
+  return IsRTL() ? BidiDirection::RTL : BidiDirection::LTR;
+};
+
+uint8_t BidiEmbeddingLevel::Value() const { return mValue; }
+
+}  // namespace mozilla::intl