[DMC #2] Add DocumentMarkerList interface and GenericDocumentMarkerListImpl

third_party/WebKit/Source/core/editing/markers/DocumentMarkerList.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 DocumentMarkerList_h
+#define DocumentMarkerList_h
+
+#include "core/CoreExport.h"
+#include "platform/heap/Handle.h"
+
+namespace blink {
+
+class DocumentMarker;
+class RenderedDocumentMarker;
+
+// This is an interface implemented by classes that DocumentMarkerController
+// uses to store DocumentMarkers. Different implementations can be written
+// to handle different MarkerTypes (e.g. to provide more optimized handling of
+// MarkerTypes with different insertion/retrieval patterns, or to provide
+// different behavior for certain MarkerTypes).
+class CORE_EXPORT DocumentMarkerList
+    : public GarbageCollectedFinalized<DocumentMarkerList> {
+ protected:

[yosin_UTC9, 2017/04/26 03:41:51]

Please make sections in public, protected and private order.
https://google.github.io/styleguide/cppguide.html#Class_Format

+  DocumentMarkerList();
+
+ public:
+  virtual ~DocumentMarkerList();
+
+  virtual bool IsEmpty() const = 0;
+
+  virtual void Add(DocumentMarker*) = 0;
+  virtual void Clear() = 0;
+
+  virtual const HeapVector<Member<RenderedDocumentMarker>>& GetMarkers()
+      const = 0;
+
+  // Returns true if at least one marker is copied, false otherwise
+  virtual bool MoveMarkers(int length, DocumentMarkerList* dst_list) = 0;
+
+  // Returns true if at least one marker is removed, false otherwise
+  virtual bool RemoveMarkers(unsigned start_offset, int length) = 0;
+
+  // Returns true if a marker was removed, false otherwise.
+  // TODO(rlanday): remove this method from this interface once we have a
+  // Spelling/Grammar-specific marker list impl to put this on
+  virtual bool RemoveMarkersUnderWords(const String& node_text,
+                                       const Vector<String>& words) = 0;
+
+  // Returns true if at least one marker is shifted or removed, false otherwise
+  virtual bool ShiftMarkers(unsigned offset,
+                            unsigned old_length,
+                            unsigned new_length) = 0;
+
+  DEFINE_INLINE_VIRTUAL_TRACE() {}
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(DocumentMarkerList);
+};
+
+}  // namespace blink
+
+#endif  // DocumentMarkerList_h