blame: src/pathcompletermodel.h

#pragma once

#include <QAbstractListModel>

#include <QString>

#include <QStringList>

// Lightweight ajax-style completion model that exposes the immediate

// subdirectories of whatever parent directory the user is typing into the

// path field. Refreshed on each text change via setPrefix(); we only re-scan

// when the parent directory actually changes, so per-keystroke cost is just

// the QCompleter filter pass over an already-loaded list.

//

// Directory enumeration mirrors FsDirModel::listSubdirs (std::filesystem with

// QFile::decodeName), so non-ASCII names that round-trip through the locale

// are listed correctly.

class PathCompleterModel : public QAbstractListModel

{

    Q_OBJECT

public:

    explicit PathCompleterModel(QObject *parent = nullptr);

    int rowCount(const QModelIndex &parent = QModelIndex()) const override;

    QVariant data(const QModelIndex &index, int role = Qt::DisplayRole) const override;

public slots:

    // Update entries based on the current text in the path field.

    void setPrefix(const QString &text);

private:

    QStringList m_entries;

    QString m_currentParent;

    bool m_hasParent = false;

};