showCaret(topIndex);
showCaret();
void doPageStart() {	int topCaretOffset = content.getOffsetAtLine(topIndex);	if (caretOffset > topCaretOffset) {		caretOffset = topCaretOffset;		// explicitly go to the calculated caret line. may be different 		// from content.getLineAtOffset(caretOffset) when in word wrap mode		showCaret(topIndex);	}}