DocumentMarkerList refactor as an interface

third_party/WebKit/Source/core/editing/markers/TextMatchMarker.h

+// Copyright 2017 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef TextMatchMarker_h
+#define TextMatchMarker_h
+
+#include <utility>
+#include "core/editing/markers/DocumentMarker.h"
+#include "platform/geometry/LayoutRect.h"
+
+namespace blink {
+
+class CORE_EXPORT TextMatchMarker final : public DocumentMarker {
+ public:
+  TextMatchMarker(unsigned start_offset,
+                  unsigned end_offset,
+                  DocumentMarker::MatchStatus);
+
+  bool IsRendered() const { return state_ == State::kValidNotNull; }
+
+  void SetRenderedRect(const LayoutRect& rect) {
+    if (state_ == State::kValidNotNull && rect == renderedRect_)
+      return;
+    state_ = State::kValidNotNull;
+    renderedRect_ = rect;
+  }
+
+  const LayoutRect& RenderedRect() const {
+    DCHECK_EQ(state_, State::kValidNotNull);
+    return renderedRect_;
+  }
+
+  void UpdateRenderedRectIfNeeded(const Node&);
+  void UpdateRenderedRect(const Node&);
+
+  void NullifyRenderedRect() {
+    state_ = State::kValidNull;
+    // Now |renderedRect_| can not be accessed until |setRenderedRect| is
+    // called.
+  }
+
+  void Invalidate() { state_ = State::kInvalid; }
+  bool IsValid() const { return state_ != State::kInvalid; }
+
+ protected:
+  TextMatchMarker(const TextMatchMarker&) = default;
+
+ private:
+  enum class State { kInvalid, kValidNull, kValidNotNull };
+
+  LayoutRect renderedRect_;
+  State state_;
+};
+
+DEFINE_TYPE_CASTS(TextMatchMarker,
+                  DocumentMarker,
+                  marker,
+                  marker->GetType() == DocumentMarker::kTextMatch,
+                  marker.GetType() == DocumentMarker::kTextMatch);
+
+}  // namespace blink
+
+#endif  // TextMatchMarker_h