1 files changed, 68 insertions, 0 deletions
diff --git a/layout/generic/WBRFrame.cpp b/layout/generic/WBRFrame.cpp
new file mode 100644
index 0000000000..3ad733a2a4
--- /dev/null
+++ b/layout/generic/WBRFrame.cpp
@@ -0,0 +1,68 @@
+/* -*- 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/. */
+
+/* rendering object for HTML <wbr> elements */
+
+#include "mozilla/PresShell.h"
+#include "nsHTMLParts.h"
+#include "nsIFrame.h"
+
+using namespace mozilla;
+
+namespace mozilla {
+
+class WBRFrame final : public nsIFrame {
+ public:
+  NS_DECL_FRAMEARENA_HELPERS(WBRFrame)
+
+  friend nsIFrame* ::NS_NewWBRFrame(mozilla::PresShell* aPresShell,
+                                    ComputedStyle* aStyle);
+
+  virtual FrameSearchResult PeekOffsetNoAmount(bool aForward,
+                                               int32_t* aOffset) override;
+  virtual FrameSearchResult PeekOffsetCharacter(
+      bool aForward, int32_t* aOffset,
+      PeekOffsetCharacterOptions aOptions =
+          PeekOffsetCharacterOptions()) override;
+  virtual FrameSearchResult PeekOffsetWord(
+      bool aForward, bool aWordSelectEatSpace, bool aIsKeyboardSelect,
+      int32_t* aOffset, PeekWordState* aState, bool aTrimSpaces) override;
+
+ protected:
+  explicit WBRFrame(ComputedStyle* aStyle, nsPresContext* aPresContext)
+      : nsIFrame(aStyle, aPresContext, kClassID) {}
+};
+
+}  // namespace mozilla
+
+nsIFrame* NS_NewWBRFrame(mozilla::PresShell* aPresShell,
+                         ComputedStyle* aStyle) {
+  return new (aPresShell) WBRFrame(aStyle, aPresShell->GetPresContext());
+}
+
+NS_IMPL_FRAMEARENA_HELPERS(WBRFrame)
+
+nsIFrame::FrameSearchResult WBRFrame::PeekOffsetNoAmount(bool aForward,
+                                                         int32_t* aOffset) {
+  NS_ASSERTION(aOffset && *aOffset <= 1, "aOffset out of range");
+  // WBR frames can not contain text or non-rendered whitespace
+  return CONTINUE;
+}
+
+nsIFrame::FrameSearchResult WBRFrame::PeekOffsetCharacter(
+    bool aForward, int32_t* aOffset, PeekOffsetCharacterOptions aOptions) {
+  NS_ASSERTION(aOffset && *aOffset <= 1, "aOffset out of range");
+  // WBR frames can not contain characters
+  return CONTINUE;
+}
+
+nsIFrame::FrameSearchResult WBRFrame::PeekOffsetWord(
+    bool aForward, bool aWordSelectEatSpace, bool aIsKeyboardSelect,
+    int32_t* aOffset, PeekWordState* aState, bool aTrimSpaces) {
+  NS_ASSERTION(aOffset && *aOffset <= 1, "aOffset out of range");
+  // WBR frames can never contain text so we'll never find a word inside them
+  return CONTINUE;
+}