/* copyright

This file is part of JKomasto2.
Written in 2022 by Usawashi <usawashi16@yahoo.co.jp>

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program.  If not, see <https://www.gnu.org/licenses/>.

copyright */

import java.awt.datatransfer.Clipboard;
import java.awt.datatransfer.ClipboardOwner;
import java.awt.datatransfer.Transferable;
import java.awt.datatransfer.DataFlavor;
import java.awt.Toolkit;

class
ClipboardApi
implements Transferable, ClipboardOwner {

    private static final ClipboardApi
    instance = new ClipboardApi();

    private static String
    string;

//  ---%-@-%---

    public static void
    serve(String string)
    {
        assert string != null;
        instance.string = string;
        Toolkit tk = Toolkit.getDefaultToolkit();
        Clipboard cb = tk.getSystemClipboard();
        cb.setContents(instance, instance);
    }

//   -  -%-  -

    public String
    getTransferData(DataFlavor flavour)
    {
        assert flavour == DataFlavor.stringFlavor;
        return string;
    }

    public DataFlavor[]
    getTransferDataFlavors()
    {
        return new DataFlavor[] { DataFlavor.stringFlavor };
        /*
        * We should probably also support javaJVMLocalObjectMimeType,
        * so that the compose window can ask for the List<Segment>.
        * Although also like, if we don't store emoji shortcodes in
        * the image segments, there is no point. Anyways, what is
        * important is the string format first, allowing us to
        * copy links or large lengths of text.
        */
    }

    public boolean
    isDataFlavorSupported(DataFlavor flavour)
    {
        return flavour == DataFlavor.stringFlavor;
    }

    public void
    lostOwnership(Clipboard clipboard, Transferable contents) { }

}