win8/metro_driver/ime/text_service_delegate.h

   1 // Copyright 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef WIN8_METRO_DRIVER_IME_TEXT_SERVICE_DELEGATE_H_
   6 #define WIN8_METRO_DRIVER_IME_TEXT_SERVICE_DELEGATE_H_
   7
   8 #include <vector>
   9
  10 #include "base/basictypes.h"
  11 #include "base/strings/string16.h"
  12
  13 namespace metro_viewer {
  14 struct UnderlineInfo;
  15 }
  16
  17 namespace metro_driver {
  18
  19 // A delegate which works together with virtual text service.
  20 // Objects that implement this delegate will receive notifications from a
  21 // virtual text service whenever an IME updates the composition or commits text.
  22 class TextServiceDelegate {
  23  public:
  24   virtual ~TextServiceDelegate() {}
  25
  26   // Called when on-going composition is updated. An empty |text| represents
  27   // that the composition is canceled.
  28   virtual void OnCompositionChanged(
  29       const base::string16& text,
  30       int32 selection_start,
  31       int32 selection_end,
  32       const std::vector<metro_viewer::UnderlineInfo>& underlines) = 0;
  33
  34   // Called when |text| is committed.
  35   virtual void OnTextCommitted(const base::string16& text) = 0;
  36 };
  37
  38 }  // namespace metro_driver
  39
  40 #endif  // WIN8_METRO_DRIVER_IME_TEXT_SERVICE_DELEGATE_H_