Add spellcheck and word suggestion to the prediction service

services/prediction/key_set.h

Index: services/prediction/key_set.h
diff --git a/services/prediction/key_set.h b/services/prediction/key_set.h
new file mode 100644
index 0000000000000000000000000000000000000000..d8d60301b9ccf099e9b047826f34473c3e3c48e8
--- /dev/null
+++ b/services/prediction/key_set.h
@@ -0,0 +1,94 @@
+// 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_KEY_SET_H_
+#define SERVICES_PREDICTION_KEY_SET_H_
+
+#include "base/macros.h"
+#include "mojo/services/prediction/public/interfaces/prediction.mojom.h"
+
+// qwerty keyboard key sets
+
+namespace prediction {
+
+// NOTE: This struct has been modified from the Android Open
+// Source Project. Specifically from the following file:
+// https://android.googlesource.com/platform/packages/inputmethods/LatinIME/+/
+// android-5.1.1_r8/java/src/com/android/inputmethod/keyboard/Key.java
+struct Key {
+  int kcode;
+  // Width of the key, not including the gap
+  int kwidth;
+  // Height of the key, not including the gap
+  int kheight;
+  // X coordinate of the key in the keyboard layout
+  int kx;
+  // Y coordinate of the key in the keyboard layout
+  int ky;
+  // Hit bounding box of the key
+  int khit_box_left;
+  int khit_box_top;
+  int khit_box_right;
+  int khit_box_bottom;
+
+  Key(const int code,
+      const int x,
+      const int y,
+      const int width,
+      const int height,
+      const int horizontal_gap,
+      const int vertical_gap) {
+    kheight = height - vertical_gap;
+    kwidth = width - horizontal_gap;
+    kcode = code;
+    kx = x + horizontal_gap / 2;
+    ky = y;
+    khit_box_left = x;
+    khit_box_top = y;
+    khit_box_right = x + width + 1;
+    khit_box_bottom = y + height;
+  }
+};
+
+class KeySet {

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

There doesn't seem to be a purpose to this class as everything is static.  Can
we remove it?  Maybe use a namespace instead?

[riajiang, 2015/07/31 02:13:05]

Changed it to use namespace 

+ public:
+  static const Key key_set[];
+  static const int key_count;
+
+  static int SquaredDistanceToEdge(int x, int y, Key k);
+
+ private:
+  static const Key A;
+  static const Key B;
+  static const Key C;
+  static const Key D;
+  static const Key E;
+  static const Key F;
+  static const Key G;
+  static const Key H;
+  static const Key I;
+  static const Key J;
+  static const Key K;
+  static const Key L;
+  static const Key M;
+  static const Key N;
+  static const Key O;
+  static const Key P;
+  static const Key Q;
+  static const Key R;
+  static const Key S;
+  static const Key T;
+  static const Key U;
+  static const Key V;
+  static const Key W;
+  static const Key X;
+  static const Key Y;
+  static const Key Z;
+
+  DISALLOW_COPY_AND_ASSIGN(KeySet);
+};  // class KeySet
+
+}  // namespace prediction
+
+#endif  // SERVICES_PREDICTION_KEY_SET_H_