/*
 * Copyright 2006-2019 DLR, Germany
 * 
 * SPDX-License-Identifier: EPL-1.0
 * 
 * https://rcenvironment.de/
 */

package de.rcenvironment.core.gui.workflow.view.console;

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

import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jface.viewers.TableViewer;

import de.rcenvironment.core.component.execution.api.ConsoleRow;
import de.rcenvironment.core.gui.utils.common.ClipboardHelper;

/**
 * Helper class that handles copying of the current selection to the clipboard.
 *
 * @author Oliver Seebach
 */
public class CopyToClipboardHelper {

    /** Constant for copy message hotkeys. */
    public static final String COPY_MESSAGE = "CopyMessage";

    /** Constant for copy line hotkeys. */
    public static final String COPY_LINE = "CopyLine";

    private TableViewer tableViewer;

    public CopyToClipboardHelper(TableViewer aTableViewer) {
        tableViewer = aTableViewer;
    }

    /**
     * Copies the current selection to the clipboard.
     * 
     * @param copyEvent distinguishes between copy and copy Message only
     */
    public void copyToClipboard(String copyEvent) {
        ISelection selection = tableViewer.getSelection();

        List<ConsoleRow> consoleRows = new ArrayList<ConsoleRow>();
        if (selection != null && selection instanceof IStructuredSelection) {
            IStructuredSelection sel = (IStructuredSelection) selection;
            for (@SuppressWarnings("unchecked") Iterator<ConsoleRow> iterator = sel.iterator(); iterator.hasNext();) {
                ConsoleRow row = iterator.next();
                consoleRows.add(row);
            }
        }

        StringBuilder sb = new StringBuilder();

        if (copyEvent.contains(Messages.copyMessage) || copyEvent.equals(COPY_MESSAGE)) { // Copy the message only
            for (ConsoleRow row : consoleRows) {
                sb.append(row.getPayload() + System.getProperty("line.separator")); //$NON-NLS-1$
            }
        } else if (copyEvent.contains(Messages.copyLine) || copyEvent.equals(COPY_LINE)) { // Copy the whole line
            for (ConsoleRow row : consoleRows) {
                sb.append(row + System.getProperty("line.separator")); //$NON-NLS-1$
            }
        }

        ClipboardHelper.setContent(sb.toString());

    }

}
