Java tutorial
/* * Copyright 2012 GitHub Inc. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package com.github.mobile.ui.commit; import static com.github.mobile.Intents.EXTRA_BASE; import static com.github.mobile.Intents.EXTRA_HEAD; import static com.github.mobile.Intents.EXTRA_PATH; import static com.github.mobile.Intents.EXTRA_REPOSITORY; import static com.github.mobile.util.PreferenceUtils.RENDER_MARKDOWN; import static com.github.mobile.util.PreferenceUtils.WRAP; import android.content.Intent; import android.os.Bundle; import android.support.v4.app.LoaderManager.LoaderCallbacks; import android.support.v4.content.Loader; import android.text.TextUtils; import android.util.Log; import android.webkit.WebView; import android.widget.ProgressBar; import com.actionbarsherlock.app.ActionBar; import com.actionbarsherlock.view.Menu; import com.actionbarsherlock.view.MenuItem; import com.github.kevinsawicki.wishlist.ViewUtils; import com.github.mobile.Intents.Builder; import com.github.mobile.R.id; import com.github.mobile.R.layout; import com.github.mobile.R.menu; import com.github.mobile.R.string; import com.github.mobile.core.code.RefreshBlobTask; import com.github.mobile.core.commit.CommitUtils; import com.github.mobile.ui.BaseActivity; import com.github.mobile.ui.MarkdownLoader; import com.github.mobile.util.AvatarLoader; import com.github.mobile.util.HttpImageGetter; import com.github.mobile.util.MarkdownUtils; import com.github.mobile.util.PreferenceUtils; import com.github.mobile.util.ShareUtils; import com.github.mobile.util.SourceEditor; import com.github.mobile.util.ToastUtils; import com.google.inject.Inject; import java.io.Serializable; import org.eclipse.egit.github.core.Blob; import org.eclipse.egit.github.core.CommitFile; import org.eclipse.egit.github.core.IRepositoryIdProvider; import org.eclipse.egit.github.core.Repository; import org.eclipse.egit.github.core.util.EncodingUtils; /** * Activity to display the contents of a file in a commit */ public class CommitFileViewActivity extends BaseActivity implements LoaderCallbacks<CharSequence> { private static final String TAG = "CommitFileViewActivity"; private static final String ARG_TEXT = "text"; private static final String ARG_REPO = "repo"; /** * Create intent to show file in commit * * @param repository * @param commit * @param file * @return intent */ public static Intent createIntent(Repository repository, String commit, CommitFile file) { Builder builder = new Builder("commit.file.VIEW"); builder.repo(repository); builder.add(EXTRA_HEAD, commit); builder.add(EXTRA_PATH, file.getFilename()); builder.add(EXTRA_BASE, file.getSha()); return builder.toIntent(); } private Repository repo; private String commit; private String sha; private String path; private String file; private boolean isMarkdownFile; private String renderedMarkdown; private Blob blob; private ProgressBar loadingBar; private WebView codeView; private SourceEditor editor; private MenuItem markdownItem; @Inject private AvatarLoader avatars; @Inject private HttpImageGetter imageGetter; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(layout.commit_file_view); repo = getSerializableExtra(EXTRA_REPOSITORY); commit = getStringExtra(EXTRA_HEAD); sha = getStringExtra(EXTRA_BASE); path = getStringExtra(EXTRA_PATH); loadingBar = finder.find(id.pb_loading); codeView = finder.find(id.wv_code); file = CommitUtils.getName(path); isMarkdownFile = MarkdownUtils.isMarkdown(file); editor = new SourceEditor(codeView); editor.setWrap(PreferenceUtils.getCodePreferences(this).getBoolean(WRAP, false)); ActionBar actionBar = getSupportActionBar(); int lastSlash = path.lastIndexOf('/'); if (lastSlash != -1) actionBar.setTitle(path.substring(lastSlash + 1)); else actionBar.setTitle(path); actionBar.setSubtitle(getString(string.commit_prefix) + CommitUtils.abbreviate(commit)); avatars.bind(actionBar, repo.getOwner()); loadContent(); } @Override public boolean onCreateOptionsMenu(final Menu optionsMenu) { getSupportMenuInflater().inflate(menu.file_view, optionsMenu); MenuItem wrapItem = optionsMenu.findItem(id.m_wrap); if (PreferenceUtils.getCodePreferences(this).getBoolean(WRAP, false)) wrapItem.setTitle(string.disable_wrapping); else wrapItem.setTitle(string.enable_wrapping); markdownItem = optionsMenu.findItem(id.m_render_markdown); if (isMarkdownFile) { markdownItem.setEnabled(blob != null); markdownItem.setVisible(true); if (PreferenceUtils.getCodePreferences(this).getBoolean(RENDER_MARKDOWN, true)) markdownItem.setTitle(string.show_raw_markdown); else markdownItem.setTitle(string.render_markdown); } return true; } @Override public boolean onOptionsItemSelected(MenuItem item) { switch (item.getItemId()) { case id.m_wrap: if (editor.getWrap()) item.setTitle(string.enable_wrapping); else item.setTitle(string.disable_wrapping); editor.toggleWrap(); PreferenceUtils .save(PreferenceUtils.getCodePreferences(this).edit().putBoolean(WRAP, editor.getWrap())); return true; case id.m_share: shareFile(); return true; case id.m_render_markdown: if (editor.isMarkdown()) { item.setTitle(string.render_markdown); editor.toggleMarkdown(); editor.setSource(file, blob); } else { item.setTitle(string.show_raw_markdown); editor.toggleMarkdown(); if (renderedMarkdown != null) editor.setSource(file, renderedMarkdown, false); else loadMarkdown(); } PreferenceUtils.save(PreferenceUtils.getCodePreferences(this).edit().putBoolean(RENDER_MARKDOWN, editor.isMarkdown())); return true; default: return super.onOptionsItemSelected(item); } } @Override public Loader<CharSequence> onCreateLoader(int loader, Bundle args) { final String raw = args.getString(ARG_TEXT); final IRepositoryIdProvider repo = (IRepositoryIdProvider) args.getSerializable(ARG_REPO); return new MarkdownLoader(this, repo, raw, imageGetter, false); } @Override public void onLoadFinished(Loader<CharSequence> loader, CharSequence rendered) { if (rendered == null) ToastUtils.show(this, string.error_rendering_markdown); ViewUtils.setGone(loadingBar, true); ViewUtils.setGone(codeView, false); if (!TextUtils.isEmpty(rendered)) { renderedMarkdown = rendered.toString(); if (markdownItem != null) markdownItem.setEnabled(true); editor.setMarkdown(true).setSource(file, renderedMarkdown, false); } } @Override public void onLoaderReset(Loader<CharSequence> loader) { } private void shareFile() { String id = repo.generateId(); startActivity(ShareUtils.create(path + " at " + CommitUtils.abbreviate(commit) + " on " + id, "https://github.com/" + id + "/blob/" + commit + '/' + path)); } private void loadMarkdown() { ViewUtils.setGone(loadingBar, false); ViewUtils.setGone(codeView, true); String markdown = new String(EncodingUtils.fromBase64(blob.getContent())); Bundle args = new Bundle(); args.putCharSequence(ARG_TEXT, markdown); args.putSerializable(ARG_REPO, repo); getSupportLoaderManager().restartLoader(0, args, this); } private void loadContent() { new RefreshBlobTask(repo, sha, this) { @Override protected void onSuccess(Blob blob) throws Exception { super.onSuccess(blob); ViewUtils.setGone(loadingBar, true); ViewUtils.setGone(codeView, false); editor.setSource(path, blob); CommitFileViewActivity.this.blob = blob; if (markdownItem != null) markdownItem.setEnabled(true); if (isMarkdownFile && PreferenceUtils.getCodePreferences(CommitFileViewActivity.this) .getBoolean(RENDER_MARKDOWN, true)) loadMarkdown(); else { ViewUtils.setGone(loadingBar, true); ViewUtils.setGone(codeView, false); editor.setSource(path, blob); } } @Override protected void onException(Exception e) throws RuntimeException { super.onException(e); Log.d(TAG, "Loading commit file contents failed", e); ViewUtils.setGone(loadingBar, true); ViewUtils.setGone(codeView, false); ToastUtils.show(CommitFileViewActivity.this, e, string.error_file_load); } }.execute(); } }