/projects/netbeans-7.3/mercurial/src/org/netbeans/modules/mercurial/ui/diff/DiffAction.java

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

import org.netbeans.modules.versioning.spi.VCSContext;
import org.netbeans.modules.versioning.util.Utils;

import javax.swing.*;
import java.io.File;
import java.util.Set;
import org.netbeans.modules.mercurial.FileInformation;
import org.netbeans.modules.mercurial.FileStatus;

import org.netbeans.modules.mercurial.Mercurial;
import org.netbeans.modules.mercurial.OutputLogger;
import org.netbeans.modules.mercurial.util.HgUtils;
import org.netbeans.modules.mercurial.ui.actions.ContextAction;
import org.netbeans.modules.mercurial.ui.log.HgLogMessage.HgRevision;
import org.openide.nodes.Node;
import org.openide.util.NbBundle;

/**
 * Diff action for mercurial: 
 * hg diff - diff repository (or selected files)
 * 
 * @author John Rice
 */
public class DiffAction extends ContextAction {
    
    @Override
    protected boolean enable(Node[] nodes) {
        VCSContext context = HgUtils.getCurrentContext(nodes);
        Set<File> ctxFiles = context != null? context.getRootFiles(): null;
        if(!HgUtils.isFromHgRepository(context) || ctxFiles == null || ctxFiles.isEmpty())
            return false;
        return true;
    }

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

    @Override
    protected String iconResource () {
        return "org/netbeans/modules/mercurial/resources/icons/diff.png"; // NOI18N
    }

    @Override
    protected void performContextAction(Node[] nodes) {
        VCSContext context = HgUtils.getCurrentContext(nodes);
        String contextName = Utils.getContextDisplayName(context);
                
        File [] files = context.getRootFiles().toArray(new File[context.getRootFiles().size()]);
        boolean bNotManaged = !HgUtils.isFromHgRepository(context) || ( files == null || files.length == 0);

        if (bNotManaged) {
            OutputLogger logger = OutputLogger.getLogger(Mercurial.MERCURIAL_OUTPUT_TAB_TITLE);
            logger.outputInRed( NbBundle.getMessage(DiffAction.class,"MSG_DIFF_TITLE")); // NOI18N
            logger.outputInRed( NbBundle.getMessage(DiffAction.class,"MSG_DIFF_TITLE_SEP")); // NOI18N
            logger.outputInRed(
                    NbBundle.getMessage(DiffAction.class, "MSG_DIFF_NOT_SUPPORTED_INVIEW_INFO")); // NOI18N
            logger.output(""); // NOI18N
            logger.closeLog();
            JOptionPane.showMessageDialog(null,
                    NbBundle.getMessage(DiffAction.class, "MSG_DIFF_NOT_SUPPORTED_INVIEW"),// NOI18N
                    NbBundle.getMessage(DiffAction.class, "MSG_DIFF_NOT_SUPPORTED_INVIEW_TITLE"),// NOI18N
                    JOptionPane.INFORMATION_MESSAGE);
            return;
        }

        diff(context, Setup.DIFFTYPE_LOCAL, contextName);
    }

    public static void diff(VCSContext ctx, int type, String contextName) {

        MultiDiffPanel panel = new MultiDiffPanel(ctx, type, contextName); // spawns background DiffPrepareTask
        DiffTopComponent tc = new DiffTopComponent(panel);
        tc.setName(NbBundle.getMessage(DiffAction.class, "CTL_DiffPanel_Title", contextName)); // NOI18N
        tc.open();
        tc.requestActive();
    }

    public static void diff(File file1, HgRevision rev1, File file2, HgRevision rev2) {
        MultiDiffPanel panel = new MultiDiffPanel(file2, rev1, rev2,
                new FileInformation(FileInformation.STATUS_VERSIONED_UPTODATE, new FileStatus(file2, file1), false),
                false); // spawns background DiffPrepareTask
        DiffTopComponent tc = new DiffTopComponent(panel);
        tc.setName(NbBundle.getMessage(DiffAction.class, "CTL_DiffPanel_Title", file2.getName())); // NOI18N
        tc.open();
        tc.requestActive();
    }

    public void diff (File[] roots, HgRevision rev1, HgRevision rev2, String diffViewName, boolean displayUnversionedFiles) {
        MultiDiffPanel panel = new MultiDiffPanel(roots, rev1, rev2, displayUnversionedFiles); // spawns background DiffPrepareTask
        DiffTopComponent tc = new DiffTopComponent(panel);
        tc.setName(diffViewName);
        tc.open();
        tc.requestActive();
    }
}