/projects/netbeans-7.3/mercurial/src/org/netbeans/modules/mercurial/ui/queues/QDiffAction.java

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package org.netbeans.modules.mercurial.ui.queues;

import java.awt.EventQueue;
import java.io.File;
import java.util.Arrays;
import java.util.List;
import org.netbeans.modules.mercurial.HgException;
import org.netbeans.modules.mercurial.HgProgressSupport;
import org.netbeans.modules.mercurial.Mercurial;
import org.netbeans.modules.mercurial.ui.actions.ContextAction;
import org.netbeans.modules.mercurial.ui.diff.DiffAction;
import org.netbeans.modules.mercurial.ui.log.HgLogMessage;
import org.netbeans.modules.mercurial.util.HgCommand;
import org.netbeans.modules.mercurial.util.HgUtils;
import org.netbeans.modules.versioning.spi.VCSContext;
import org.openide.DialogDisplayer;
import org.openide.NotifyDescriptor;
import org.openide.awt.ActionID;
import org.openide.awt.ActionRegistration;
import org.openide.nodes.Node;
import org.openide.util.NbBundle;
import org.openide.util.actions.SystemAction;

/**
 *
 * @author ondra
 */
@ActionID(id = "org.netbeans.modules.mercurial.ui.queues.QDiffAction", category = "Mercurial/Queues")
@ActionRegistration(displayName = "#CTL_MenuItem_QDiff")
public class QDiffAction extends ContextAction {

    @Override
    protected boolean enable (Node[] nodes) {
        return HgUtils.isFromHgRepository(HgUtils.getCurrentContext(nodes));
    }

    @Override
    protected String getBaseName (Node[] nodes) {
        return "CTL_MenuItem_QDiff"; //NOI18N
    }

    @Override
    protected void performContextAction (Node[] nodes) {
        VCSContext ctx = HgUtils.getCurrentContext(nodes);
        final File roots[] = HgUtils.getActionRoots(ctx);
        if (roots == null || roots.length == 0) return;
        final File root = Mercurial.getInstance().getRepositoryRoot(roots[0]);
        new HgProgressSupport() {

            @Override
            protected void perform () {
                try {
                    List<HgLogMessage> parents = HgCommand.getParents(root, null, null);
                    if (parents.size() != 1 || !Arrays.asList(parents.get(0).getTags()).contains(QPatch.TAG_QTIP)) {
                        NotifyDescriptor.Message e = new NotifyDescriptor.Message(NbBundle.getMessage(QDiffAction.class, "MSG_DiffAction.error.notAtTip"), NotifyDescriptor.ERROR_MESSAGE); //NOI18N
                        DialogDisplayer.getDefault().notifyLater(e);
                    } else {
                        final HgLogMessage.HgRevision parent = HgCommand.getParent(root, null, QPatch.TAG_QTIP);
                        if (parent != null && parent != HgLogMessage.HgRevision.EMPTY) {
                            EventQueue.invokeLater(new Runnable() {
                                @Override
                                public void run () {
                                    SystemAction.get(DiffAction.class).diff(roots, parent, HgLogMessage.HgRevision.CURRENT,
                                            NbBundle.getMessage(QDiffAction.class, "LBL_DiffView.name", //NOI18N
                                            roots.length == 1 ? roots[0].getName() : NbBundle.getMessage(QDiffAction.class, "LBL_DiffView.name.files", roots.length)), false); //NOI18N
                                }
                            });
                        }
                    }
                } catch (HgException.HgCommandCanceledException ex) {
                    // canceled by user, do nothing
                } catch (HgException ex) {
                    HgUtils.notifyException(ex);
                }
            }
            
        }.start(Mercurial.getInstance().getRequestProcessor(root), root, NbBundle.getMessage(QDiffAction.class, "LBL_DiffAction.progress")); //NOI18N
    }

}