First Implementation of Snapped Points

cc/layers/snap_point_list.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 CC_LAYERS_SNAP_POINT_LIST_H_
+#define CC_LAYERS_SNAP_POINT_LIST_H_
+
+#include <vector>
+#include "cc/cc_export.h"
+
+namespace cc {
+
+struct CC_EXPORT SnapPoint {
+  SnapPoint() : offset(0.0), must_snap(false), is_start(false), is_end(false) {}
+  SnapPoint(double o, bool m, bool start, bool end)
+      : offset(o), must_snap(m), is_start(start), is_end(end) {}
+  SnapPoint(const SnapPoint& p)
+      : offset(p.offset),
+        must_snap(p.must_snap),
+        is_start(p.is_start),
+        is_end(p.is_end) {}
+
+  double offset;
+  bool must_snap;
+  bool is_start;
+  bool is_end;
+
+  bool operator==(const SnapPoint&) const;
+  bool operator!=(const SnapPoint&) const;
+};
+
+struct CC_EXPORT SnapPointList {
+  SnapPointList();
+  SnapPointList(const SnapPointList&);
+  ~SnapPointList();
+
+  std::vector<SnapPoint> horizontal;
+  std::vector<SnapPoint> vertical;
+
+  bool operator==(const SnapPointList&) const;
+  bool operator!=(const SnapPointList&) const;
+};
+
+}  // namespace cc
+
+#endif  // CC_LAYERS_SNAP_POINT_LIST_H_