Bug 151960 Library element popup menu display is wrong.
1:Creat a libray, add a table to this libray. 2:public this library. 3:Creat a report design. 4:Open the library explore, drag the table to the layout editor. 5:Select the table row, copy the selection row. 6:Select other row, clik the right button of the mouse to popup the menu . The result:Paste action and insert copied column action is highlight.
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/api/ColumnBandShiftAction.java
}
	}
	/**
	 * Checks whether the paste operation can be done with the given copied
	 * column band data, the column index and the operation flag.
	 * 
	 * @param sourceColumn
	 *            the source column to shift
	 * @param destColumn
	 *            the target column to shift
	 * @return <code>true</code> indicates the paste operation can be done.
	 *         Otherwise <code>false</code>.
	 */
	protected boolean checkTargetColumn( int sourceColumn, int destColumn )
	{
		
		int newPosn = adjustDestPosn( sourceColumn, destColumn );
		if ( newPosn == -1 )
			return true;
		int columnCount = adapter.getColumnCount( );
		if ( newPosn == 0 || newPosn == columnCount )
			return true;
		List originalCells = getCellsContextInfo( adapter
				.getCellsUnderColumn( newPosn ) );
		if ( !isRectangleArea( originalCells, 1 ) )
			return false;
		return true;
	}
}