Add spellcheck and word suggestion to the prediction service

services/prediction/proximity_info_service.h

+// Copyright 2015 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 SERVICES_PREDICTION_PROXIMITY_INFO_SERVICE_H_
+#define SERVICES_PREDICTION_PROXIMITY_INFO_SERVICE_H_
+
+#include "mojo/services/prediction/public/interfaces/prediction.mojom.h"
+#include "services/prediction/key_set.h"
+#include "third_party/prediction/suggest/core/layout/proximity_info.h"
+
+// NOTE: This class has been translated to C++ and modified from the Android
+// Open Source Project. Specifically from some functions of the following file:
+// https://android.googlesource.com/platform/packages/inputmethods/LatinIME/+/
+// android-5.1.1_r8/java/src/com/android/inputmethod/keyboard/ProximityInfo.java
+
+namespace prediction {
+
+class TouchPositionCorrection;
+
+class ProximityInfoService {

[APW, 2015/07/23 20:11:28]

This is really a Factory, not a Service

[riajiang, 2015/07/31 02:13:04]

Done.

+ public:
+  ProximityInfoService(const std::string locale,
+                       const int grid_width,
+                       const int grid_height,
+                       const int min_width,
+                       const int height,
+                       const int most_common_key_width,
+                       const int most_common_key_height,
+                       TouchPositionCorrection* touch_position_correction);
+  ~ProximityInfoService();
+
+  latinime::ProximityInfo* GetNativeProximityInfoService();
+
+ private:
+  // Number of key widths from current touch point to search for nearest keys.
+  static const float SEARCH_DISTANCE;
+  static const float DEFAULT_TOUCH_POSITION_CORRECTION_RADIUS;
+
+  int pgrid_width;
+  int pgrid_height;
+  int pgrid_size;
+  int pcell_width;
+  int pcell_height;
+  int pkeyboard_min_width;
+  int pkeyboard_height;
+  int pmost_common_key_width;
+  int pmost_common_key_height;
+  const Key*** pgrid_neighbors;
+  std::string plocale;
+  int* neighbor_count_per_cell;
+  latinime::ProximityInfo* pnative_proximity_info;
+
+  static bool NeedsProximityInfoService(const Key key);
+
+  latinime::ProximityInfo* CreateNativeProximityInfoService(
+      TouchPositionCorrection* touch_position_correction);
+
+  void ComputeNearestNeighbors();
+};  // class ProximityInfoService
+
+}  // namespace prediction
+
+#endif  // SERVICES_PREDICTION_PROXIMITY_INFO_SERVICE_H_