qiosinputcontext.h

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// Copyright (C) 2020 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
 
#ifndef QIOSINPUTCONTEXT_H
#define QIOSINPUTCONTEXT_H
 
#include <UIKit/UIKit.h>
 
#include <QtCore/qlocale.h>
#include <QtGui/qevent.h>
#include <QtGui/qtransform.h>
#include <qpa/qplatforminputcontext.h>
 
const char kImePlatformDataInputView[] = "inputView";
const char kImePlatformDataInputAccessoryView[] = "inputAccessoryView";
const char kImePlatformDataHideShortcutsBar[] = "hideShortcutsBar";
const char kImePlatformDataReturnKeyType[] = "returnKeyType";
 
@class QIOSLocaleListener;
@class QIOSKeyboardListener;
@class QIOSTextResponder;
@protocol KeyboardState;
 
QT_BEGIN_NAMESPACE
 
struct KeyboardState
{
    KeyboardState() :
        keyboardVisible(false), keyboardAnimating(false),
        animationDuration(0), animationCurve(UIViewAnimationCurve(-1))
        {}
 
    bool keyboardVisible;
    bool keyboardAnimating;
    QRectF keyboardRect;
    CGRect keyboardEndRect;
    NSTimeInterval animationDuration;
    UIViewAnimationCurve animationCurve;
};
 
struct ImeState
{
    ImeState() = default;
    Qt::InputMethodQueries update(Qt::InputMethodQueries properties);
    QInputMethodQueryEvent currentState = QInputMethodQueryEvent({});
    QObject *focusObject = nullptr;
};
 
class QIOSInputContext : public QPlatformInputContext
{
public:
    QIOSInputContext();
    ~QIOSInputContext();
 
    bool isValid() const override { return true; }
 
    void showInputPanel() override;
    void hideInputPanel() override;
 
    bool isInputPanelVisible() const override;
    bool isAnimating() const override;
    QRectF keyboardRect() const override;
 
    void update(Qt::InputMethodQueries) override;
    void reset() override;
    void commit() override;
 
    QLocale locale() const override;
 
    void clearCurrentFocusObject();
 
    void setFocusObject(QObject *object) override;
    void focusWindowChanged(QWindow *focusWindow);
 
    void scrollToCursor();
    void scroll(int y);
 
    void updateKeyboardState(NSNotification *notification = nullptr);
 
    const ImeState &imeState() { return m_imeState; }
    const KeyboardState &keyboardState() { return m_keyboardState; }
 
    bool inputMethodAccepted() const;
 
    static QIOSInputContext *instance();
 
private:
    UIView* scrollableRootView();
 
    QIOSLocaleListener *m_localeListener;
    QIOSKeyboardListener *m_keyboardHideGesture;
    QIOSTextResponder *m_textResponder;
    KeyboardState m_keyboardState;
    ImeState m_imeState;
};
 
QT_END_NAMESPACE
 
#endif