/** Redoes the text. */
final void redo() {
if (undo == null) return;
text = new BaseXTextTokens(undo.next());
rend.setText(text);
text.pos(undo.cursor());
text.setCaret();
}
/**
* Sets the output text.
*
* @param t output text
* @param s text size
*/
public final void setText(final byte[] t, final int s) {
// remove invalid characters and compare old with new string
int ns = 0;
final int ts = text.size();
final byte[] tt = text.text();
boolean eq = true;
for (int r = 0; r < s; ++r) {
final byte b = t[r];
// support characters, highlighting codes, tabs and newlines
if (b >= ' ' || b <= TokenBuilder.MARK || b == 0x09 || b == 0x0A) {
t[ns++] = t[r];
}
eq &= ns < ts && ns < s && t[ns] == tt[ns];
}
eq &= ns == ts;
// new text is different...
if (!eq) {
text = new BaseXTextTokens(Arrays.copyOf(t, ns));
rend.setText(text);
scroll.pos(0);
}
if (undo != null) undo.store(t.length != ns ? Arrays.copyOf(t, ns) : t, 0);
SwingUtilities.invokeLater(calc);
}