Pepper IME API for surrounding text retrieval.

ppapi/cpp/dev/text_input_dev.h

 // Copyright (c) 2011 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 PPAPI_CPP_DEV_TEXT_INPUT_DEV_H_
 #define PPAPI_CPP_DEV_TEXT_INPUT_DEV_H_
 
+#include <string>
 #include "ppapi/c/dev/ppb_text_input_dev.h"
 #include "ppapi/cpp/instance_handle.h"
 
-/// @file
-/// This file defines the API for controlling text input methods.
 namespace pp {
 
 class Rect;
+class Instance;
 
+// This class allows you to associate the PPP_TextInput_Dev and
+// PPB_TextInput_Dev C-based interfaces with an object. It associates itself
+// with the given instance, and registers as the global handler for handling the
+// PPP_TextInput_Dev interface that the browser calls.
+//
+// You would typically use this either via inheritance on your instance:
+//   class MyInstance : public pp::Instance, public pp::TextInput_Dev {
+//     class MyInstance() : pp::TextInput_Dev(this) {
+//     }
+//     ...
+//   };
+//
+// or by composition:
+//   class MyTextInput : public pp::TextInput_Dev {
+//     ...
+//   };
+//
+//   class MyInstance : public pp::Instance {
+//     MyInstance() : text_input_(this) {
+//     }
+//
+//     MyTextInput text_input_;
+//   };
 class TextInput_Dev {
  public:
-  explicit TextInput_Dev(const InstanceHandle& instance);
+  explicit TextInput_Dev(Instance* instance);
   virtual ~TextInput_Dev();
 
+  virtual void RequestSurroundingText(uint32_t desired_number_of_characters);
+
   void SetTextInputType(PP_TextInput_Type type);
   void UpdateCaretPosition(const Rect& caret, const Rect& bounding_box);
   void CancelCompositionText();
+  void SelectionChanged();
+  void UpdateSurroundingText(const std::string& text,
+                             uint32_t caret, uint32_t anchor);
 
  private:
   InstanceHandle instance_;
 };
 
 }  // namespace pp
 
 #endif  // PPAPI_CPP_DEV_TEXT_INPUT_DEV_H_