/*
* Copyright 2012 Google 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.google.android.apps.iosched.ui;
import com.google.analytics.tracking.android.EasyTracker;
import com.google.android.apps.iosched.R;
import com.google.android.apps.iosched.provider.ScheduleContract;
import com.google.android.apps.iosched.util.SessionsHelper;
import com.google.android.apps.iosched.util.UIUtils;
import com.google.android.apps.iosched.util.actionmodecompat.ActionMode;
import com.google.android.apps.iosched.util.actionmodecompat.MultiChoiceModeListener;
import com.actionbarsherlock.app.SherlockListFragment;
import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.database.ContentObserver;
import android.database.Cursor;
import android.graphics.Color;
import android.net.Uri;
import android.os.Bundle;
import android.os.Handler;
import android.os.SystemClock;
import android.provider.BaseColumns;
import android.support.v4.app.ListFragment;
import android.support.v4.app.LoaderManager;
import android.support.v4.content.CursorLoader;
import android.support.v4.content.Loader;
import android.text.Spannable;
import android.text.TextUtils;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.CursorAdapter;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;
import java.util.LinkedHashSet;
import static com.google.android.apps.iosched.util.LogUtils.LOGD;
import static com.google.android.apps.iosched.util.LogUtils.LOGV;
import static com.google.android.apps.iosched.util.LogUtils.LOGW;
import static com.google.android.apps.iosched.util.LogUtils.makeLogTag;
import static com.google.android.apps.iosched.util.UIUtils.buildStyledSnippet;
import static com.google.android.apps.iosched.util.UIUtils.formatSessionSubtitle;
/**
* A {@link ListFragment} showing a list of sessions. This fragment supports multiple-selection
* using the contextual action bar (on API 11+ devices), and also supports a separate 'activated'
* state for indicating the currently-opened detail view on tablet devices.
*/
public class SessionsFragment extends SherlockListFragment implements
LoaderManager.LoaderCallbacks<Cursor>,
MultiChoiceModeListener {
private static final String TAG = makeLogTag(SessionsFragment.class);
private static final String STATE_SELECTED_ID = "selectedId";
private CursorAdapter mAdapter;
private String mSelectedSessionId;
private MenuItem mStarredMenuItem;
private MenuItem mMapMenuItem;
private MenuItem mShareMenuItem;
private MenuItem mSocialStreamMenuItem;
private boolean mHasSetEmptyText = false;
private int mSessionQueryToken;
private LinkedHashSet<Integer> mSelectedSessionPositions = new LinkedHashSet<Integer>();
private Handler mHandler = new Handler();
public interface Callbacks {
/** Return true to select (activate) the session in the list, false otherwise. */
public boolean onSessionSelected(String sessionId);
}
private static Callbacks sDummyCallbacks = new Callbacks() {
@Override
public boolean onSessionSelected(String sessionId) {
return true;
}
};
private Callbacks mCallbacks = sDummyCallbacks;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
if (savedInstanceState != null) {
mSelectedSessionId = savedInstanceState.getString(STATE_SELECTED_ID);
}
reloadFromArguments(getArguments());
}
protected void reloadFromArguments(Bundle arguments) {
// Teardown from previous arguments
setListAdapter(null);
// Load new arguments
final Intent intent = BaseActivity.fragmentArgumentsToIntent(arguments);
final Uri sessionsUri = intent.getData();
if (sessionsUri == null) {
return;
}
if (!ScheduleContract.Sessions.isSearchUri(sessionsUri)) {
mAdapter = new SessionsAdapter(getActivity());
mSessionQueryToken = SessionsQuery._TOKEN;
} else {
mAdapter = new SearchAdapter(getActivity());
mSessionQueryToken = SearchQuery._TOKEN;
}
setListAdapter(mAdapter);
// Force start background query to load sessions
getLoaderManager().restartLoader(mSessionQueryToken, arguments, this);
}
public void setSelectedSessionId(String id) {
mSelectedSessionId = id;
if (mAdapter != null) {
mAdapter.notifyDataSetChanged();
}
}
@Override
public void onViewCreated(View view, Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
view.setBackgroundColor(Color.WHITE);
final ListView listView = getListView();
listView.setSelector(android.R.color.transparent);
listView.setCacheColorHint(Color.WHITE);
}
@Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
if (!mHasSetEmptyText) {
// Could be a bug, but calling this twice makes it become visible
// when it shouldn't
// be visible.
setEmptyText(getString(R.string.empty_sessions));
mHasSetEmptyText = true;
}
ActionMode.setMultiChoiceMode(getListView(), getActivity(), this);
}
@Override
public void onAttach(Activity activity) {
super.onAttach(activity);
if (!(activity instanceof Callbacks)) {
throw new ClassCastException("Activity must implement fragment's callbacks.");
}
mCallbacks = (Callbacks) activity;
activity.getContentResolver().registerContentObserver(
ScheduleContract.Sessions.CONTENT_URI, true, mObserver);
}
@Override
public void onDetach() {
super.onDetach();
mCallbacks = sDummyCallbacks;
getActivity().getContentResolver().unregisterContentObserver(mObserver);
}
@Override
public void onResume() {
super.onResume();
mHandler.post(mRefreshSessionsRunnable);
}
@Override
public void onPause() {
super.onPause();
mHandler.removeCallbacks(mRefreshSessionsRunnable);
}
@Override
public void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
if (mSelectedSessionId != null) {
outState.putString(STATE_SELECTED_ID, mSelectedSessionId);
}
}
/** {@inheritDoc} */
@Override
public void onListItemClick(ListView l, View v, int position, long id) {
final Cursor cursor = (Cursor) mAdapter.getItem(position);
String sessionId = cursor.getString(cursor.getColumnIndex(
ScheduleContract.Sessions.SESSION_ID));
if (mCallbacks.onSessionSelected(sessionId)) {
mSelectedSessionId = sessionId;
mAdapter.notifyDataSetChanged();
}
}
// LoaderCallbacks interface
@Override
public Loader<Cursor> onCreateLoader(int id, Bundle data) {
final Intent intent = BaseActivity.fragmentArgumentsToIntent(data);
final Uri sessionsUri = intent.getData();
Loader<Cursor> loader = null;
if (id == SessionsQuery._TOKEN) {
loader = new CursorLoader(getActivity(), sessionsUri, SessionsQuery.PROJECTION,
null, null, ScheduleContract.Sessions.DEFAULT_SORT);
} else if (id == SearchQuery._TOKEN) {
loader = new CursorLoader(getActivity(), sessionsUri, SearchQuery.PROJECTION, null,
null, ScheduleContract.Sessions.DEFAULT_SORT);
}
return loader;
}
@Override
public void onLoadFinished(Loader<Cursor> loader, Cursor cursor) {
if (getActivity() == null) {
return;
}
int token = loader.getId();
if (token == SessionsQuery._TOKEN || token == SearchQuery._TOKEN) {
mAdapter.changeCursor(cursor);
Bundle arguments = getArguments();
if (arguments != null && arguments.containsKey("_uri")) {
String uri = arguments.get("_uri").toString();
if(uri != null && uri.contains("blocks")) {
String title = arguments.getString(Intent.EXTRA_TITLE);
if (title == null) {
title = (String) this.getActivity().getTitle();
}
EasyTracker.getTracker().trackView("Session Block: " + title);
LOGD("Tracker", "Session Block: " + title);
}
}
} else {
LOGD(TAG, "Query complete, Not Actionable: " + token);
cursor.close();
}
}
@Override
public void onLoaderReset(Loader<Cursor> loader) {
}
// MultiChoiceModeListener interface
@Override
public boolean onActionItemClicked(ActionMode mode, MenuItem item) {
SessionsHelper helper = new SessionsHelper(getActivity());
mode.finish();
int itemId = item.getItemId();
if (itemId == R.id.menu_map) {
// multiple selection not supported
int position = mSelectedSessionPositions.iterator().next();
Cursor cursor = (Cursor) mAdapter.getItem(position);
String roomId = cursor.getString(SessionsQuery.ROOM_ID);
helper.startMapActivity(roomId);
String title = cursor.getString(SessionsQuery.TITLE);
EasyTracker.getTracker().trackEvent(
"Session", "Mapped", title, 0L);
LOGV(TAG, "Starred: " + title);
return true;
} else if (itemId == R.id.menu_star) {
// multiple selection supported
boolean starred = false;
int numChanged = 0;
for (int position : mSelectedSessionPositions) {
Cursor cursor = (Cursor) mAdapter.getItem(position);
String title = cursor.getString(SessionsQuery.TITLE);
String sessionId = cursor.getString(SessionsQuery.SESSION_ID);
Uri sessionUri = ScheduleContract.Sessions.buildSessionUri(sessionId);
starred = cursor.getInt(SessionsQuery.STARRED) == 0;
helper.setSessionStarred(sessionUri, starred, title);
++numChanged;
EasyTracker.getTracker().trackEvent(
"Session", starred ? "Starred" : "Unstarred", title, 0L);
LOGV(TAG, "Starred: " + title);
}
Toast.makeText(
getActivity(),
getResources().getQuantityString(starred
? R.plurals.toast_added_to_schedule
: R.plurals.toast_removed_from_schedule, numChanged, numChanged),
Toast.LENGTH_SHORT).show();
setSelectedSessionStarred(starred);
return true;
} else if (itemId == R.id.menu_share) {
// multiple selection not supported
int position = mSelectedSessionPositions.iterator().next();
// On ICS+ devices, we normally won't reach this as ShareActionProvider will handle
// sharing.
Cursor cursor = (Cursor) mAdapter.getItem(position);
new SessionsHelper(getActivity()).shareSession(getActivity(),
R.string.share_template,
cursor.getString(SessionsQuery.TITLE),
cursor.getString(SessionsQuery.HASHTAGS),
cursor.getString(SessionsQuery.URL));
return true;
} else if (itemId == R.id.menu_social_stream) {
StringBuilder hashtags = new StringBuilder();
for (int position : mSelectedSessionPositions) {
Cursor cursor = (Cursor) mAdapter.getItem(position);
String term = cursor.getString(SessionsQuery.HASHTAGS);
if (!term.startsWith("#")) {
term = "#" + term;
}
if (hashtags.length() > 0) {
hashtags.append(" OR ");
}
hashtags.append(term);
String title = cursor.getString(SessionsQuery.TITLE);
EasyTracker.getTracker().trackEvent(
"Session", "Mapped", title, 0L);
LOGV(TAG, "Starred: " + title);
}
helper.startSocialStream(hashtags.toString());
return true;
} else {
LOGW(TAG, "CAB unknown selection=" + item.getItemId());
return false;
}
}
@Override
public boolean onCreateActionMode(ActionMode mode, Menu menu) {
MenuInflater inflater = mode.getMenuInflater();
inflater.inflate(R.menu.sessions_context, menu);
mStarredMenuItem = menu.findItem(R.id.menu_star);
mMapMenuItem = menu.findItem(R.id.menu_map);
mShareMenuItem = menu.findItem(R.id.menu_share);
mSocialStreamMenuItem = menu.findItem(R.id.menu_social_stream);
mSelectedSessionPositions.clear();
return true;
}
@Override
public void onDestroyActionMode(ActionMode mode) {}
@Override
public boolean onPrepareActionMode(ActionMode mode, Menu menu) {
return false;
}
@Override
public void onItemCheckedStateChanged(ActionMode mode, int position, long id, boolean checked) {
if (checked) {
mSelectedSessionPositions.add(position);
} else {
mSelectedSessionPositions.remove(position);
}
int numSelectedSessions = mSelectedSessionPositions.size();
mode.setTitle(getResources().getQuantityString(
R.plurals.title_selected_sessions,
numSelectedSessions, numSelectedSessions));
if (numSelectedSessions == 1) {
// activate all the menu item
mMapMenuItem.setVisible(true);
mShareMenuItem.setVisible(true);
mSocialStreamMenuItem.setVisible(true);
mStarredMenuItem.setVisible(true);
position = mSelectedSessionPositions.iterator().next();
Cursor cursor = (Cursor) mAdapter.getItem(position);
boolean starred = cursor.getInt(SessionsQuery.STARRED) != 0;
setSelectedSessionStarred(starred);
} else {
mMapMenuItem.setVisible(false);
mShareMenuItem.setVisible(false);
mSocialStreamMenuItem.setVisible(false);
boolean allStarred = true;
boolean allUnstarred = true;
for (int pos : mSelectedSessionPositions) {
Cursor cursor = (Cursor) mAdapter.getItem(pos);
boolean starred = cursor.getInt(SessionsQuery.STARRED) != 0;
allStarred = allStarred && starred;
allUnstarred = allUnstarred && !starred;
}
if (allStarred) {
setSelectedSessionStarred(true);
mStarredMenuItem.setVisible(true);
} else if (allUnstarred) {
setSelectedSessionStarred(false);
mStarredMenuItem.setVisible(true);
} else {
mStarredMenuItem.setVisible(false);
}
}
}
private void setSelectedSessionStarred(boolean starred) {
mStarredMenuItem.setTitle(starred
? R.string.description_remove_schedule
: R.string.description_add_schedule);
mStarredMenuItem.setIcon(starred
? R.drawable.ic_action_remove_schedule
: R.drawable.ic_action_add_schedule);
}
private final Runnable mRefreshSessionsRunnable = new Runnable() {
public void run() {
if (mAdapter != null) {
// This is used to refresh session title colors.
mAdapter.notifyDataSetChanged();
}
// Check again on the next quarter hour, with some padding to
// account for network
// time differences.
long nextQuarterHour = (SystemClock.uptimeMillis() / 900000 + 1) * 900000 + 5000;
mHandler.postAtTime(mRefreshSessionsRunnable, nextQuarterHour);
}
};
private final ContentObserver mObserver = new ContentObserver(new Handler()) {
@Override
public void onChange(boolean selfChange) {
if (getActivity() == null) {
return;
}
Loader<Cursor> loader = getLoaderManager().getLoader(mSessionQueryToken);
if (loader != null) {
loader.forceLoad();
}
}
};
/**
* {@link CursorAdapter} that renders a {@link SessionsQuery}.
*/
private class SessionsAdapter extends CursorAdapter {
public SessionsAdapter(Context context) {
super(context, null, false);
}
/** {@inheritDoc} */
@Override
public View newView(Context context, Cursor cursor, ViewGroup parent) {
return getActivity().getLayoutInflater().inflate(R.layout.list_item_session, parent,
false);
}
/** {@inheritDoc} */
@Override
public void bindView(View view, Context context, Cursor cursor) {
String sessionId = cursor.getString(SessionsQuery.SESSION_ID);
if (sessionId == null) {
return;
}
if (sessionId.equals(mSelectedSessionId)){
UIUtils.setActivatedCompat(view, true);
} else {
UIUtils.setActivatedCompat(view, false);
}
final TextView titleView = (TextView) view.findViewById(R.id.session_title);
final TextView subtitleView = (TextView) view.findViewById(R.id.session_subtitle);
final String sessionTitle = cursor.getString(SessionsQuery.TITLE);
titleView.setText(sessionTitle);
// Format time block this session occupies
final long blockStart = cursor.getLong(SessionsQuery.BLOCK_START);
final long blockEnd = cursor.getLong(SessionsQuery.BLOCK_END);
final String roomName = cursor.getString(SessionsQuery.ROOM_NAME);
final String subtitle = formatSessionSubtitle(
sessionTitle, blockStart, blockEnd, roomName, context);
final boolean starred = cursor.getInt(SessionsQuery.STARRED) != 0;
view.findViewById(R.id.indicator_in_schedule).setVisibility(
starred ? View.VISIBLE : View.INVISIBLE);
final boolean hasLivestream = !TextUtils.isEmpty(
cursor.getString(SessionsQuery.LIVESTREAM_URL));
// Show past/present/future and livestream status for this block.
UIUtils.updateTimeAndLivestreamBlockUI(context,
blockStart, blockEnd, hasLivestream,
view.findViewById(R.id.list_item_session), titleView, subtitleView, subtitle);
}
}
/**
* {@link CursorAdapter} that renders a {@link SearchQuery}.
*/
private class SearchAdapter extends CursorAdapter {
public SearchAdapter(Context context) {
super(context, null, false);
}
/** {@inheritDoc} */
@Override
public View newView(Context context, Cursor cursor, ViewGroup parent) {
return getActivity().getLayoutInflater().inflate(R.layout.list_item_session, parent,
false);
}
/** {@inheritDoc} */
@Override
public void bindView(View view, Context context, Cursor cursor) {
UIUtils.setActivatedCompat(view, cursor.getString(SessionsQuery.SESSION_ID)
.equals(mSelectedSessionId));
((TextView) view.findViewById(R.id.session_title)).setText(cursor
.getString(SearchQuery.TITLE));
final String snippet = cursor.getString(SearchQuery.SEARCH_SNIPPET);
final Spannable styledSnippet = buildStyledSnippet(snippet);
((TextView) view.findViewById(R.id.session_subtitle)).setText(styledSnippet);
final boolean starred = cursor.getInt(SearchQuery.STARRED) != 0;
view.findViewById(R.id.indicator_in_schedule).setVisibility(
starred ? View.VISIBLE : View.INVISIBLE);
}
}
/**
* {@link com.google.android.apps.iosched.provider.ScheduleContract.Sessions}
* query parameters.
*/
private interface SessionsQuery {
int _TOKEN = 0x1;
String[] PROJECTION = {
BaseColumns._ID,
ScheduleContract.Sessions.SESSION_ID,
ScheduleContract.Sessions.SESSION_TITLE,
ScheduleContract.Sessions.SESSION_STARRED,
ScheduleContract.Blocks.BLOCK_START,
ScheduleContract.Blocks.BLOCK_END,
ScheduleContract.Rooms.ROOM_NAME,
ScheduleContract.Rooms.ROOM_ID,
ScheduleContract.Sessions.SESSION_HASHTAGS,
ScheduleContract.Sessions.SESSION_URL,
ScheduleContract.Sessions.SESSION_LIVESTREAM_URL,
};
int _ID = 0;
int SESSION_ID = 1;
int TITLE = 2;
int STARRED = 3;
int BLOCK_START = 4;
int BLOCK_END = 5;
int ROOM_NAME = 6;
int ROOM_ID = 7;
int HASHTAGS = 8;
int URL = 9;
int LIVESTREAM_URL = 10;
}
/**
* {@link com.google.android.apps.iosched.provider.ScheduleContract.Sessions}
* search query parameters.
*/
private interface SearchQuery {
int _TOKEN = 0x3;
String[] PROJECTION = {
BaseColumns._ID,
ScheduleContract.Sessions.SESSION_ID,
ScheduleContract.Sessions.SESSION_TITLE,
ScheduleContract.Sessions.SESSION_STARRED,
ScheduleContract.Sessions.SEARCH_SNIPPET,
ScheduleContract.Sessions.SESSION_LEVEL,
ScheduleContract.Rooms.ROOM_NAME,
ScheduleContract.Rooms.ROOM_ID,
ScheduleContract.Sessions.SESSION_HASHTAGS,
ScheduleContract.Sessions.SESSION_URL
};
int _ID = 0;
int SESSION_ID = 1;
int TITLE = 2;
int STARRED = 3;
int SEARCH_SNIPPET = 4;
int LEVEL = 5;
int ROOM_NAME = 6;
int ROOM_ID = 7;
int HASHTAGS = 8;
int URL = 9;
}
}