1package eu.siacs.conversations.ui.widget;
 2
 3import android.content.ClipData;
 4import android.content.ClipboardManager;
 5import android.content.Context;
 6import android.support.v7.widget.AppCompatTextView;
 7import android.util.AttributeSet;
 8
 9public class CopyTextView extends AppCompatTextView {
10
11	public CopyTextView(Context context) {
12		super(context);
13	}
14
15	public CopyTextView(Context context, AttributeSet attrs) {
16		super(context, attrs);
17	}
18
19	public CopyTextView(Context context, AttributeSet attrs, int defStyleAttr) {
20		super(context, attrs, defStyleAttr);
21	}
22
23	public interface CopyHandler {
24		String transformTextForCopy(CharSequence text, int start, int end);
25	}
26
27	private CopyHandler copyHandler;
28
29	public void setCopyHandler(CopyHandler copyHandler) {
30		this.copyHandler = copyHandler;
31	}
32
33	@Override
34	public boolean onTextContextMenuItem(int id) {
35		final CharSequence text = getText();
36		int min = 0;
37		int max = text.length();
38		if (isFocused()) {
39			final int selStart = getSelectionStart();
40			final int selEnd = getSelectionEnd();
41			min = Math.max(0, Math.min(selStart, selEnd));
42			max = Math.max(0, Math.max(selStart, selEnd));
43		}
44		String textForCopy = null;
45		if (id == android.R.id.copy && copyHandler != null) {
46			textForCopy = copyHandler.transformTextForCopy(getText(), min, max);
47		}
48		try {
49			return super.onTextContextMenuItem(id);
50		} finally {
51			if (textForCopy != null) {
52				ClipboardManager clipboard = (ClipboardManager) getContext().
53						getSystemService(Context.CLIPBOARD_SERVICE);
54				clipboard.setPrimaryClip(ClipData.newPlainText(null, textForCopy));
55			}
56		}
57	}
58}