qwasminputcontext.h

Enable keyboard shortcuts

// Copyright (C) 2019 The Qt Company Ltd.

// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only

// Qt-Security score:significant reason:default

#ifndef QWASMINPUTCONTEXT_H

#define QWASMINPUTCONTEXT_H

#include "qwasmwindow.h"

#include <qpa/qplatforminputcontext.h>

#include <private/qstdweb_p.h>

#include <QtCore/qloggingcategory.h>

#include <emscripten/bind.h>

#include <emscripten/html5.h>

#include <emscripten/emscripten.h>

QT_BEGIN_NAMESPACE

Q_DECLARE_LOGGING_CATEGORY(qLcQpaWasmInputContext)

class QWasmInputContext : public QPlatformInputContext

    Q_DISABLE_COPY(QWasmInputContext)

    Q_OBJECT

public:

    explicit QWasmInputContext();

    ~QWasmInputContext() override;

    bool isValid() const override { return true; }

    void update(Qt::InputMethodQueries) override;

    void showInputPanel() override;

    void hideInputPanel() override;

    void setFocusObject(QObject *object) override;

    const QString preeditString() { return m_preeditString; }

    void setPreeditString(QString preeditStr);

    void insertPreedit(int repalcementLength = 0);

    void commitPreeditAndClear();

    void commitText(const QString &text, int replaceFrom = 0, int replaceLength = 0);

    void focusOnFocusWindow(QWasmWindow::FocusTarget target);

    void inputCallback(emscripten::val event);

    void compositionEndCallback(emscripten::val event);

    void compositionStartCallback(emscripten::val event);

    void compositionUpdateCallback(emscripten::val event);

    void beforeInputCallback(emscripten::val event);

    bool isActive() { return inputMethodAccepted(); }

    bool m_ignoreNextInput = false;

private:

    void updateInputElement();

    struct CompositionRange

        int start = 0;

        int end = 0;

        bool isValid = false;

};

    CompositionRange getFirstRange() const;

    struct ResolvedRange

        int replaceFrom = 0;

        int replaceLength = 0;

};

    ResolvedRange resolveRange(const CompositionRange &range) const;

    QString m_preeditString;

    QObject *m_focusObject = nullptr;

    emscripten::val m_inputElement = emscripten::val::null();

    emscripten::val m_compositionRange = emscripten::val::null();

};

QT_END_NAMESPACE

#endif // QWASMINPUTCONTEXT_H