Implement GetTextFromRange(), GetTextRange() and GetSelectionRange() for ArcImeService.

components/arc/ime/arc_ime_service.h

 // Copyright 2016 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 COMPONENTS_ARC_IME_ARC_IME_SERVICE_H_
 #define COMPONENTS_ARC_IME_ARC_IME_SERVICE_H_
 
 #include <memory>
 
 #include "base/macros.h"
@@ skipping 62 matching lines @@
 
   // Overridden from exo::WMHelper::FocusObserver:
   void OnWindowFocused(aura::Window* gained_focus,
                        aura::Window* lost_focus) override;
 
   // Overridden from ArcImeBridge::Delegate:
   void OnTextInputTypeChanged(ui::TextInputType type) override;
   void OnCursorRectChanged(const gfx::Rect& rect) override;
   void OnCancelComposition() override;
   void ShowImeIfNeeded() override;
+  void OnCursorRectChangedWithSurroundingText(
+      const gfx::Rect& rect,
+      const gfx::Range& text_range,
+      const base::string16& text_in_range,
+      const gfx::Range& selection_range) override;
 
   // Overridden from keyboard::KeyboardControllerObserver.
   void OnKeyboardBoundsChanging(const gfx::Rect& rect) override;
   void OnKeyboardClosed() override;
 
   // Overridden from ui::TextInputClient:
   void SetCompositionText(const ui::CompositionText& composition) override;
   void ConfirmCompositionText() override;
   void ClearCompositionText() override;
   void InsertText(const base::string16& text) override;
   void InsertChar(const ui::KeyEvent& event) override;
   ui::TextInputType GetTextInputType() const override;
   gfx::Rect GetCaretBounds() const override;
+  bool GetTextRange(gfx::Range* range) const override;
+  bool GetSelectionRange(gfx::Range* range) const override;
+  bool GetTextFromRange(const gfx::Range& range,
+                        base::string16* text) const override;
 
   // Overridden from ui::TextInputClient (with default implementation):
   // TODO(kinaba): Support each of these methods to the extent possible in
   // Android input method API.
   ui::TextInputMode GetTextInputMode() const override;
   base::i18n::TextDirection GetTextDirection() const override;
   int GetTextInputFlags() const override;
   bool CanComposeInline() const override;
   bool GetCompositionCharacterBounds(uint32_t index,
                                      gfx::Rect* rect) const override;
   bool HasCompositionText() const override;
-  bool GetTextRange(gfx::Range* range) const override;
   bool GetCompositionTextRange(gfx::Range* range) const override;
-  bool GetSelectionRange(gfx::Range* range) const override;
   bool SetSelectionRange(const gfx::Range& range) override;
   bool DeleteRange(const gfx::Range& range) override;
-  bool GetTextFromRange(const gfx::Range& range,
-                        base::string16* text) const override;
   void OnInputMethodChanged() override {}
   bool ChangeTextDirectionAndLayoutAlignment(
       base::i18n::TextDirection direction) override;
   void ExtendSelectionAndDelete(size_t before, size_t after) override;
   void EnsureCaretNotInRect(const gfx::Rect& rect) override {}
   bool IsTextEditCommandEnabled(ui::TextEditCommand command) const override;
   void SetTextEditCommandForNextKeyEvent(ui::TextEditCommand command) override {
   }
 
  private:
   ui::InputMethod* GetInputMethod();
 
+  void InvalidateSurroundingTextAndSelectionRange();
+
   std::unique_ptr<ArcImeBridge> ime_bridge_;
   std::unique_ptr<ArcWindowDelegate> arc_window_delegate_;
   ui::TextInputType ime_type_;
   gfx::Rect cursor_rect_;
   bool has_composition_text_;
+  gfx::Range text_range_;
+  base::string16 text_in_range_;
+  gfx::Range selection_range_;
 
   aura::Window* focused_arc_window_ = nullptr;
 
   keyboard::KeyboardController* keyboard_controller_;
 
   ui::InputMethod* test_input_method_;
   bool is_focus_observer_installed_;
 
   DISALLOW_COPY_AND_ASSIGN(ArcImeService);
 };
 
 }  // namespace arc
 
 #endif  // COMPONENTS_ARC_IME_ARC_IME_SERVICE_H_