Clipboard Explorer: see what files hide in clipboard

main.cpp

#include "mainwindow.h"
#include <QApplication>

// Description: simple application with intuitive interface.
// It dumps content of clipboard into files. Useful when you have many different content
// types in your clipboard, and want to see them all.
// All output goes into console window, so run from console.
// Requires Qt5Core and Qt5Widgets. Can be built with qmake or cmake (I build with qmake).

int main(int argc, char *argv[])
{
    QApplication a (argc, argv);
    MainWindow w;
    w.show();

    return a.exec();
}

mainwindow.cpp

#include "mainwindow.h"

#include <QGuiApplication>
#include <QClipboard>
#include <QMimeData>
#include <QPixmap>
#include <QPushButton>
#include <QBoxLayout>
#include <QFile>
#include <QDebug>


void infoClicked()
{
    auto* data = QGuiApplication::clipboard()->mimeData();

    qDebug() << "Available formats:";
    auto formats = data->formats();
    for (const auto& format : formats)
    {
        qDebug() << format;
    }
}

void dumpClicked()
{
    auto* data = QGuiApplication::clipboard()->mimeData();
    auto formats = data->formats();

    if (data->hasImage())
    {
        auto&& file = QFile("image_data");
        if (not file.open(QIODevice::WriteOnly))
        {
            qDebug() << "could not write image";
        }
        else
        {
            file.write(data->imageData().toByteArray());
            qDebug() << "written image_data";
        }
    }

    for (const auto& format : formats)
    {
        if (format == "TARGETS" or format == "MULTIPLE" or format == "TIMESTAMP" or format == "SAVE_TARGETS")  continue;

        auto&& content = data->data(format);

        if (format.contains("image/"))
        {
            // as we've written image above and there are a lot of them
            continue;
        }
        if (format == "text/plain" or format == "text/html" or format == "text/uri-list")
        {
            qDebug(content);
        }
        else
        {
            if (content.isEmpty())
            {
                qDebug() << "data for" << format << "is empty";
                continue;
            }
            auto&& name = QString(format);
            name.replace(QChar('/'), QChar('%'));
            auto&& file = QFile(name);
            if (not file.open(QIODevice::ReadWrite))
            {
                qDebug() << "error writing to file" << name;
                continue;
            }
            auto size = file.write(content);
            file.flush(); file.close();
            qDebug() << "written" << size << "bytes to" << name;
        }
    }
}


MainWindow::MainWindow(QWidget *parent)
    : QMainWindow(parent)
{
    setMinimumSize(400, 400);

    auto* central = new QWidget(this);
    auto* layout = new QBoxLayout(QBoxLayout::TopToBottom, central);

    auto* infoButton = new QPushButton("List mime types", this);
    connect(infoButton, &QPushButton::clicked, &infoClicked);
    layout->addWidget(infoButton);

    auto* dumpButton = new QPushButton("Dump data", this);
    connect(dumpButton, &QPushButton::clicked, &dumpClicked);
    layout->addWidget(dumpButton);

    central->setLayout(layout);
    this->setCentralWidget(central);
}

mainwindow.h

#pragma once
#include <QMainWindow>

class MainWindow : public QMainWindow
{
    Q_OBJECT

public:
    MainWindow(QWidget *parent = nullptr);
    ~MainWindow() = default;
};