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| 1 // Copyright (c) 2011 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 UI_VIEWS_IME_INPUT_METHOD_BASE_H_ | |
| 6 #define UI_VIEWS_IME_INPUT_METHOD_BASE_H_ | |
| 7 | |
| 8 #include "base/basictypes.h" | |
| 9 #include "base/compiler_specific.h" | |
| 10 #include "ui/views/focus/focus_manager.h" | |
| 11 #include "ui/views/ime/input_method.h" | |
| 12 #include "ui/views/ime/input_method_delegate.h" | |
| 13 | |
| 14 namespace gfx { | |
| 15 class Rect; | |
| 16 } | |
| 17 | |
| 18 namespace ui { | |
| 19 class KeyEvent; | |
| 20 } | |
| 21 | |
| 22 namespace views { | |
| 23 | |
| 24 // A helper that provides functionality shared by InputMethod implementations. | |
| 25 class VIEWS_EXPORT InputMethodBase : public InputMethod, | |
| 26 public FocusChangeListener { | |
| 27 public: | |
| 28 InputMethodBase(); | |
| 29 virtual ~InputMethodBase(); | |
| 30 | |
| 31 // Overridden from InputMethod. | |
| 32 virtual void SetDelegate(internal::InputMethodDelegate* delegate) override; | |
| 33 virtual void Init(Widget* widget) override; | |
| 34 virtual void OnTextInputTypeChanged(View* view) override; | |
| 35 virtual ui::TextInputClient* GetTextInputClient() const override; | |
| 36 virtual ui::TextInputType GetTextInputType() const override; | |
| 37 virtual bool IsMock() const override; | |
| 38 | |
| 39 // Overridden from FocusChangeListener. | |
| 40 virtual void OnWillChangeFocus(View* focused_before, View* focused) override; | |
| 41 virtual void OnDidChangeFocus(View* focused_before, View* focused) override; | |
| 42 | |
| 43 protected: | |
| 44 internal::InputMethodDelegate* delegate() const { return delegate_; } | |
| 45 Widget* widget() const { return widget_; } | |
| 46 View* GetFocusedView() const; | |
| 47 | |
| 48 // Returns true only if the View is focused and its Widget is active. | |
| 49 bool IsViewFocused(View* view) const; | |
| 50 | |
| 51 // Returns true if there is no focused text input client or its type is none. | |
| 52 bool IsTextInputTypeNone() const; | |
| 53 | |
| 54 // Calls the focused text input client's OnInputMethodChanged() method. | |
| 55 // This has no effect if the text input type is ui::TEXT_INPUT_TYPE_NONE. | |
| 56 void OnInputMethodChanged() const; | |
| 57 | |
| 58 // Convenience method to call delegate_->DispatchKeyEventPostIME(). | |
| 59 void DispatchKeyEventPostIME(const ui::KeyEvent& key) const; | |
| 60 | |
| 61 // Gets the current text input client's caret bounds in Widget's coordinates. | |
| 62 // Returns false if the current text input client doesn't support text input. | |
| 63 bool GetCaretBoundsInWidget(gfx::Rect* rect) const; | |
| 64 | |
| 65 // Removes any state installed on |widget_| and NULLs it out. Use if the | |
| 66 // widget is in a state such that it should no longer be used (such as when | |
| 67 // this is in its destructor). | |
| 68 void DetachFromWidget(); | |
| 69 | |
| 70 private: | |
| 71 internal::InputMethodDelegate* delegate_; | |
| 72 Widget* widget_; | |
| 73 | |
| 74 DISALLOW_COPY_AND_ASSIGN(InputMethodBase); | |
| 75 }; | |
| 76 | |
| 77 } // namespace views | |
| 78 | |
| 79 #endif // UI_VIEWS_IME_INPUT_METHOD_BASE_H_ | |
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