MarkingAction.java

package org.openlca.app.editors.graphical.action;

import java.util.ArrayList;
import java.util.List;

import org.eclipse.gef.commands.Command;
import org.eclipse.jface.viewers.ISelection;
import org.openlca.app.M;
import org.openlca.app.editors.graphical.command.CommandUtil;
import org.openlca.app.editors.graphical.command.MarkingCommand;
import org.openlca.app.editors.graphical.model.ProcessNode;

class MarkingAction extends EditorAction {

	static final int MARK = 1;
	static final int UNMARK = 2;
	private List<ProcessNode> processNodes = new ArrayList<>();
	private int type;

	MarkingAction(int type) {
		if (type == MARK) {
			setId(ActionIds.MARK);
			setText(M.Mark);
		} else if (type == UNMARK) {
			setId(ActionIds.UNMARK);
			setText(M.Unmark);
		}
		this.type = type;
	}

	@Override
	public void run() {
		Command actualCommand = null;
		for (ProcessNode node : processNodes) {
			boolean mark = type == MARK;
			if (node.isMarked() == mark)
				continue;
			MarkingCommand newCommand = new MarkingCommand(node);
			actualCommand = CommandUtil.chain(newCommand, actualCommand);
		}
		if (actualCommand == null)
			return;
		editor.getCommandStack().execute(actualCommand);
		editor.selectionChanged(editor.getSite().getPart(), editor.getSelection());
	}

	@Override
	protected boolean accept(ISelection selection) {
		List<ProcessNode> unfilteredNodes = getMultiSelectionOfType(selection,
				ProcessNode.class);
		boolean mark = type == MARK;
		processNodes = new ArrayList<>();
		for (ProcessNode node : unfilteredNodes)
			if (node.isMarked() != mark)
				processNodes.add(node);
		return processNodes.size() > 0;
	}
}