/*
 * Drag_Down.bsh
 * A beanshell macro for jEdit text editor
 *
 * Version 1.1
 * Tomek Pęszor
 * (c) TAAT Technologie Cyfrowe
 * info [at] taat dot pl
 *
 * Moves current line or selected lines one line down
 * It is not needed to select lines from the begining to the end.
 * Just hold shift+up/down arrow to indicate which lines to move,
 * and then, use a keyboard shortcut you have choosen for this macro.
 * I use CS+down arrow shortcut.
 *
 * 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 2
 * of the License, or 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, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 */
// check buffer read-only status
Buffer buffer = view.getBuffer();
if ( buffer.isReadOnly() ) {
   Macros.error( view, "File is read only." );
   return ;
}

// get the current selection
Selection[] selections = textArea.getSelection();

// this doesn't work right with multiple selection, so don't do anything
if (selections.length > 1) {
   Macros.error( view, "This macro does not work in multiple selection mode." );
   return;
}

String ls = buffer.getStringProperty( "lineSeparator" );

selectedLines=textArea.getSelectedLines().length;

if (selections.length==0){
	// if nothing selected, select current line
	textArea.goToEndOfLine(false);
	textArea.goToStartOfLine(true);
	// move selection down
	lines=textArea.getSelectedText();
	textArea.backspace();
	textArea.deleteLine();
	textArea.goToEndOfLine(false);
	textArea.setSelectedText(ls);
	textArea.setSelectedText(lines);
	textArea.goToEndOfLine(false);
	textArea.goToStartOfLine(true);
} else {
	selection=selections[0];
	// if something selected, expand selection to begining of first line
	// and end of the last line
	start=textArea.getLineStartOffset(selection.getStartLine());
	end=textArea.getLineEndOffset(selection.getEndLine());
	textArea.select(start, end-1);
	lines=textArea.getSelectedText();
	textArea.backspace();
	textArea.deleteLine();
	textArea.goToEndOfLine(false);
	textArea.setSelectedText(ls);
	start3=textArea.getCaretPosition();
	textArea.setSelectedText(lines);
	end3=textArea.getCaretPosition();
	textArea.select(start3, end3);
}

/*
Macro index data (in DocBook format)

<listitem>
<para><filename>Drag_Down.bsh</filename>
<abstract><para>
Moves current line or selected lines one line down.
It is not needed to select lines from the begining to the end.
Just hold shift+up/down arrow to indicate which lines to move,
and then, use a keyboard shortcut you have choosen for this macro.
Suggested shortcut: CS+down arrow.
Use in conjunction with Drag_Up.bsh macro.
</para></abstract>
</listitem>

*/