TagViewer.java

/*
 * Copyright (c) 2011, 2012 Roberto Tyley
 *
 * This file is part of 'Agit' - an Android Git client.
 *
 * Agit is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * Agit is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see http://www.gnu.org/licenses/ .
 */

package com.madgag.agit;

import static com.madgag.agit.R.id.tv_tag_ref_object;
import static com.madgag.agit.RepositoryViewerActivity.manageRepoIntent;
import static com.madgag.android.ActionBarUtil.fixImageTilingOn;
import static com.madgag.android.ActionBarUtil.homewardsWith;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.widget.Toast;

import com.actionbarsherlock.app.ActionBar;
import com.actionbarsherlock.view.Menu;
import com.actionbarsherlock.view.MenuItem;
import com.google.inject.Inject;
import com.madgag.agit.views.ObjectSummaryView;
import com.madgag.android.lazydrawables.ImageSession;

import java.io.File;
import java.io.IOException;

import org.eclipse.jgit.lib.ObjectId;
import org.eclipse.jgit.lib.Ref;
import org.eclipse.jgit.lib.RefUpdate;
import org.eclipse.jgit.lib.RefUpdate.Result;
import org.eclipse.jgit.lib.Repository;
import org.eclipse.jgit.revwalk.RevObject;
import org.eclipse.jgit.revwalk.RevTag;
import org.eclipse.jgit.revwalk.RevWalk;

import roboguice.inject.InjectExtra;
import roboguice.inject.InjectView;

public class TagViewer extends RepoScopedActivityBase {

    public static final String ACTION_SUFFIX = "tag.VIEW";

    public static Intent tagViewerIntentFor(File gitdir, String tagName) {
        return new GitIntentBuilder(ACTION_SUFFIX).gitdir(gitdir).tag(tagName).toIntent();
    }

    public static Intent tagViewerIntentFor(Repository repository, String tagName) {
        return new GitIntentBuilder(ACTION_SUFFIX).repository(repository).tag(tagName).toIntent();
    }

    private static final String TAG = "TV";

    private final static int DELETE_ID = Menu.FIRST;

    @Inject
    private ImageSession avatarSession;

    @InjectView(tv_tag_ref_object)
    ObjectSummaryView objectSummaryView;

    private RevTag revTag;

    private Ref tagRef;
    @InjectExtra(value = "tag")
    String tagName;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        fixImageTilingOn(getSupportActionBar());
        repositoryScope.doWith(repo(), new Runnable() {
            public void run() {
                setContentView(R.layout.tag_viewer_activity);
            }
        });

        ActionBar actionBar = getSupportActionBar();
        actionBar.setTitle(tagName);
        actionBar.setDisplayHomeAsUpEnabled(true);
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        super.onCreateOptionsMenu(menu);
        // menu.add(0, DELETE_ID, 0, R.string.delete_tag_menu_option).setShortcut('0', 'd');
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        Log.i(TAG, "onOptionsItemSelected " + item);
        switch (item.getItemId()) {
            case android.R.id.home:
                return homewardsWith(this, manageRepoIntent(repo()));
            case DELETE_ID:
                try {
                    RefUpdate update = repo().updateRef(tagRef.getName());
                    update.setForceUpdate(true);
                    // update.setNewObjectId(head);
                    // update.setForceUpdate(force || remote);
                    Result result = update.delete();
                    Toast.makeText(this, "Tag deletion : " + result.name(), Toast.LENGTH_SHORT).show();
                    finish();
                } catch (IOException e) {
                    Log.e(TAG, "Couldn't delete " + revTag.getName(), e);
                    throw new RuntimeException(e);
                }
                return true;
        }
        return super.onOptionsItemSelected(item);
    }


    @Override
    public void onContentChanged() {
        super.onContentChanged();
        Log.d(TAG, "updateUI called");
        tagRef = repo().getTags().get(tagName);
        if (objectSummaryView == null) {
            Log.d(TAG, "onContentChanged() : objectSummaryView is null");
            return;
        }

        if (tagRef == null) {
            getSupportActionBar().setTitle("unknown tag");
        } else {
            ObjectId peeledObjectId = repo().peel(tagRef).getPeeledObjectId();
            ObjectId taggedId = peeledObjectId == null ? tagRef.getObjectId() : peeledObjectId;
            RevWalk revWalk = new RevWalk(repo());

            ObjectId tagId = tagRef.getObjectId();
            try {
                final RevObject immediateTagRefObject = revWalk.parseAny(tagId);

                objectSummaryView.setObject(immediateTagRefObject, repo());

                if (immediateTagRefObject instanceof RevTag) {
                    revTag = revWalk.parseTag(tagId);
                    getSupportActionBar().setTitle(revTag.getTagName());
                }

            } catch (IOException e) {
                Log.e(TAG, "Couldn't get parse tag", e);
                Toast.makeText(this, "Couldn't get tag " + tagId, Toast.LENGTH_LONG).show();
            }
        }
    }
}