Add spellcheck and word suggestion to the prediction service

services/prediction/input_info.cc

+// 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.
+
+#include <new>
+
+#include "services/prediction/input_info.h"
+#include "services/prediction/key_set.h"
+#include "third_party/prediction/defines.h"
+
+namespace prediction {
+
+InputInfo::InputInfo(mojo::String& input, int input_size) {
+  real_size_ = 0;
+  for (int i = 0; i < input_size; i++) {
+    int codepoint = (int)input[i];
+    if ((codepoint >= 'a' && codepoint <= 'z') ||
+        (codepoint >= 'A' && codepoint <= 'Z')) {
+      real_size_++;
+    }
+  }
+  codepoints_ = new int[real_size_];
+  x_coordinates_ = new int[real_size_];
+  y_coordinates_ = new int[real_size_];
+  pointer_ids_ = new int[real_size_];
+  times_ = new int[real_size_];
+}
+
+InputInfo::~InputInfo() {
+  delete[] codepoints_;
+  delete[] x_coordinates_;
+  delete[] y_coordinates_;
+  delete[] pointer_ids_;
+  delete[] times_;
+}
+
+int* InputInfo::GetCodepoints() {
+  return codepoints_;
+}
+
+int* InputInfo::GetXCoordinates() {
+  return x_coordinates_;
+}
+
+int* InputInfo::GetYCoordinates() {
+  return y_coordinates_;
+}
+
+int* InputInfo::GetPointerIds() {
+  return pointer_ids_;
+}
+
+int* InputInfo::GetTimes() {
+  return times_;
+}
+
+int InputInfo::GetRealSize() {
+  return real_size_;
+}
+
+void InputInfo::ProcessInput(mojo::String& input, int input_size) {

[APW, 2015/08/03 21:38:57]

You assume here that input and input_size here are the same as in the
constructor - can't do that.

[riajiang, 2015/08/03 22:25:05]

Done.

+  int real_index = 0;
+  for (int i = 0; i < input_size; i++) {
+    int codepoint = (int)input[i];
+    if ((codepoint >= 'a' && codepoint <= 'z') ||
+        (codepoint >= 'A' && codepoint <= 'Z')) {
+      codepoints_[real_index] = codepoint;
+      for (int j = 0; j < keyset::key_count; j++) {
+        if (keyset::key_set[j].kcode == tolower(codepoint)) {
+          x_coordinates_[real_index] =
+              keyset::key_set[j].kx + keyset::key_set[j].kwidth / 2;
+          y_coordinates_[real_index] =
+              keyset::key_set[j].ky + keyset::key_set[j].kheight / 2;
+          break;
+        }
+      }
+      pointer_ids_[real_index] = 0;
+      times_[real_index] = 0;
+      real_index++;
+    }
+  }
+}
+
+}  // namespace prediction