michael@0: /* -*- Mode: Java; c-basic-offset: 4; tab-width: 20; indent-tabs-mode: nil; -*-
michael@0:  * This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: package org.mozilla.gecko.home;
michael@0: 
michael@0: import org.mozilla.gecko.AboutPages;
michael@0: import org.mozilla.gecko.GeckoProfile;
michael@0: import org.mozilla.gecko.R;
michael@0: import org.mozilla.gecko.SessionParser;
michael@0: import org.mozilla.gecko.Telemetry;
michael@0: import org.mozilla.gecko.TelemetryContract;
michael@0: import org.mozilla.gecko.db.BrowserContract.Combined;
michael@0: import org.mozilla.gecko.home.HomePager.OnNewTabsListener;
michael@0: 
michael@0: import android.app.Activity;
michael@0: import android.content.Context;
michael@0: import android.database.Cursor;
michael@0: import android.database.MatrixCursor;
michael@0: import android.database.MatrixCursor.RowBuilder;
michael@0: import android.os.Bundle;
michael@0: import android.support.v4.app.LoaderManager.LoaderCallbacks;
michael@0: import android.support.v4.content.Loader;
michael@0: import android.support.v4.widget.CursorAdapter;
michael@0: import android.view.LayoutInflater;
michael@0: import android.view.View;
michael@0: import android.view.ViewGroup;
michael@0: import android.view.ViewStub;
michael@0: import android.widget.AdapterView;
michael@0: import android.widget.ImageView;
michael@0: import android.widget.TextView;
michael@0: 
michael@0: /**
michael@0:  * Fragment that displays tabs from last session in a ListView.
michael@0:  */
michael@0: public class LastTabsPanel extends HomeFragment {
michael@0:     // Logging tag name
michael@0:     private static final String LOGTAG = "GeckoLastTabsPanel";
michael@0: 
michael@0:     // Cursor loader ID for the session parser
michael@0:     private static final int LOADER_ID_LAST_TABS = 0;
michael@0: 
michael@0:     // Adapter for the list of search results
michael@0:     private LastTabsAdapter mAdapter;
michael@0: 
michael@0:     // The view shown by the fragment.
michael@0:     private HomeListView mList;
michael@0: 
michael@0:     // The title for this HomeFragment panel.
michael@0:     private TextView mTitle;
michael@0: 
michael@0:     // The button view for restoring tabs from last session.
michael@0:     private View mRestoreButton;
michael@0: 
michael@0:     // Reference to the View to display when there are no results.
michael@0:     private View mEmptyView;
michael@0: 
michael@0:     // Callbacks used for the search and favicon cursor loaders
michael@0:     private CursorLoaderCallbacks mCursorLoaderCallbacks;
michael@0: 
michael@0:     // On new tabs listener
michael@0:     private OnNewTabsListener mNewTabsListener;
michael@0: 
michael@0:     public static LastTabsPanel newInstance() {
michael@0:         return new LastTabsPanel();
michael@0:     }
michael@0: 
michael@0:     public LastTabsPanel() {
michael@0:         mNewTabsListener = null;
michael@0:     }
michael@0: 
michael@0:     @Override
michael@0:     public void onAttach(Activity activity) {
michael@0:         super.onAttach(activity);
michael@0: 
michael@0:         try {
michael@0:             mNewTabsListener = (OnNewTabsListener) activity;
michael@0:         } catch (ClassCastException e) {
michael@0:             throw new ClassCastException(activity.toString()
michael@0:                     + " must implement HomePager.OnNewTabsListener");
michael@0:         }
michael@0:     }
michael@0: 
michael@0:     @Override
michael@0:     public void onDetach() {
michael@0:         super.onDetach();
michael@0: 
michael@0:         mNewTabsListener = null;
michael@0:     }
michael@0: 
michael@0:     @Override
michael@0:     public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
michael@0:         return inflater.inflate(R.layout.home_last_tabs_panel, container, false);
michael@0:     }
michael@0: 
michael@0:     @Override
michael@0:     public void onViewCreated(View view, Bundle savedInstanceState) {
michael@0:         mTitle = (TextView) view.findViewById(R.id.title);
michael@0:         if (mTitle != null) {
michael@0:             mTitle.setText(R.string.home_last_tabs_title);
michael@0:         }
michael@0: 
michael@0:         mList = (HomeListView) view.findViewById(R.id.list);
michael@0:         mList.setTag(HomePager.LIST_TAG_LAST_TABS);
michael@0: 
michael@0:         mList.setOnItemClickListener(new AdapterView.OnItemClickListener() {
michael@0:             @Override
michael@0:             public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
michael@0:                 final Cursor c = mAdapter.getCursor();
michael@0:                 if (c == null || !c.moveToPosition(position)) {
michael@0:                     return;
michael@0:                 }
michael@0: 
michael@0:                 Telemetry.sendUIEvent(TelemetryContract.Event.LOAD_URL);
michael@0: 
michael@0:                 final String url = c.getString(c.getColumnIndexOrThrow(Combined.URL));
michael@0:                 mNewTabsListener.onNewTabs(new String[] { url });
michael@0:             }
michael@0:         });
michael@0: 
michael@0:         mList.setContextMenuInfoFactory(new HomeContextMenuInfo.Factory() {
michael@0:             @Override
michael@0:             public HomeContextMenuInfo makeInfoForCursor(View view, int position, long id, Cursor cursor) {
michael@0:                 final HomeContextMenuInfo info = new HomeContextMenuInfo(view, position, id);
michael@0:                 info.url = cursor.getString(cursor.getColumnIndexOrThrow(Combined.URL));
michael@0:                 info.title = cursor.getString(cursor.getColumnIndexOrThrow(Combined.TITLE));
michael@0:                 return info;
michael@0:             }
michael@0:         });
michael@0: 
michael@0:         registerForContextMenu(mList);
michael@0: 
michael@0:         mRestoreButton = view.findViewById(R.id.open_all_tabs_button);
michael@0:         mRestoreButton.setOnClickListener(new View.OnClickListener() {
michael@0:             @Override
michael@0:             public void onClick(View v) {
michael@0:                 openAllTabs();
michael@0:             }
michael@0:         });
michael@0:     }
michael@0: 
michael@0:     @Override
michael@0:     public void onDestroyView() {
michael@0:         super.onDestroyView();
michael@0:         mList = null;
michael@0:         mTitle = null;
michael@0:         mEmptyView = null;
michael@0:         mRestoreButton = null;
michael@0:     }
michael@0: 
michael@0:     @Override
michael@0:     public void onActivityCreated(Bundle savedInstanceState) {
michael@0:         super.onActivityCreated(savedInstanceState);
michael@0: 
michael@0:         // Intialize adapter
michael@0:         mAdapter = new LastTabsAdapter(getActivity());
michael@0:         mList.setAdapter(mAdapter);
michael@0: 
michael@0:         // Create callbacks before the initial loader is started
michael@0:         mCursorLoaderCallbacks = new CursorLoaderCallbacks();
michael@0:         loadIfVisible();
michael@0:     }
michael@0: 
michael@0:     private void updateUiFromCursor(Cursor c) {
michael@0:         if (c != null && c.getCount() > 0) {
michael@0:             if (mTitle != null) {
michael@0:                 mTitle.setVisibility(View.VISIBLE);
michael@0:             }
michael@0:             mRestoreButton.setVisibility(View.VISIBLE);
michael@0:             return;
michael@0:         }
michael@0: 
michael@0:         // Cursor is empty, so hide the title and set the
michael@0:         // empty view if it hasn't been set already.
michael@0:         if (mTitle != null) {
michael@0:             mTitle.setVisibility(View.GONE);
michael@0:         }
michael@0:         mRestoreButton.setVisibility(View.GONE);
michael@0: 
michael@0:         if (mEmptyView == null) {
michael@0:             // Set empty panel view. We delay this so that the empty view won't flash.
michael@0:             final ViewStub emptyViewStub = (ViewStub) getView().findViewById(R.id.home_empty_view_stub);
michael@0:             mEmptyView = emptyViewStub.inflate();
michael@0: 
michael@0:             final ImageView emptyIcon = (ImageView) mEmptyView.findViewById(R.id.home_empty_image);
michael@0:             emptyIcon.setImageResource(R.drawable.icon_last_tabs_empty);
michael@0: 
michael@0:             final TextView emptyText = (TextView) mEmptyView.findViewById(R.id.home_empty_text);
michael@0:             emptyText.setText(R.string.home_last_tabs_empty);
michael@0: 
michael@0:             mList.setEmptyView(mEmptyView);
michael@0:         }
michael@0:     }
michael@0: 
michael@0:     @Override
michael@0:     protected void load() {
michael@0:         getLoaderManager().initLoader(LOADER_ID_LAST_TABS, null, mCursorLoaderCallbacks);
michael@0:     }
michael@0: 
michael@0:     private void openAllTabs() {
michael@0:         final Cursor c = mAdapter.getCursor();
michael@0:         if (c == null || !c.moveToFirst()) {
michael@0:             return;
michael@0:         }
michael@0: 
michael@0:         final String[] urls = new String[c.getCount()];
michael@0: 
michael@0:         do {
michael@0:             urls[c.getPosition()] = c.getString(c.getColumnIndexOrThrow(Combined.URL));
michael@0:         } while (c.moveToNext());
michael@0: 
michael@0:         Telemetry.sendUIEvent(TelemetryContract.Event.LOAD_URL, TelemetryContract.Method.BUTTON);
michael@0: 
michael@0:         mNewTabsListener.onNewTabs(urls);
michael@0:     }
michael@0: 
michael@0:     private static class LastTabsCursorLoader extends SimpleCursorLoader {
michael@0:         public LastTabsCursorLoader(Context context) {
michael@0:             super(context);
michael@0:         }
michael@0: 
michael@0:         @Override
michael@0:         public Cursor loadCursor() {
michael@0:             final Context context = getContext();
michael@0: 
michael@0:             final String jsonString = GeckoProfile.get(context).readSessionFile(true);
michael@0:             if (jsonString == null) {
michael@0:                 // No previous session data
michael@0:                 return null;
michael@0:             }
michael@0: 
michael@0:             final MatrixCursor c = new MatrixCursor(new String[] { Combined._ID,
michael@0:                                                                    Combined.URL,
michael@0:                                                                    Combined.TITLE });
michael@0: 
michael@0:             new SessionParser() {
michael@0:                 @Override
michael@0:                 public void onTabRead(SessionTab tab) {
michael@0:                     final String url = tab.getUrl();
michael@0: 
michael@0:                     // Don't show last tabs for about:home
michael@0:                     if (AboutPages.isAboutHome(url)) {
michael@0:                         return;
michael@0:                     }
michael@0: 
michael@0:                     final RowBuilder row = c.newRow();
michael@0:                     row.add(-1);
michael@0:                     row.add(url);
michael@0: 
michael@0:                     final String title = tab.getTitle();
michael@0:                     row.add(title);
michael@0:                 }
michael@0:             }.parse(jsonString);
michael@0: 
michael@0:             return c;
michael@0:         }
michael@0:     }
michael@0: 
michael@0:     private static class LastTabsAdapter extends CursorAdapter {
michael@0:         public LastTabsAdapter(Context context) {
michael@0:             super(context, null, 0);
michael@0:         }
michael@0: 
michael@0:         @Override
michael@0:         public void bindView(View view, Context context, Cursor cursor) {
michael@0:             ((TwoLinePageRow) view).updateFromCursor(cursor);
michael@0:         }
michael@0: 
michael@0:         @Override
michael@0:         public View newView(Context context, Cursor cursor, ViewGroup parent) {
michael@0:             return LayoutInflater.from(context).inflate(R.layout.home_item_row, parent, false);
michael@0:         }
michael@0:     }
michael@0: 
michael@0:     private class CursorLoaderCallbacks implements LoaderCallbacks<Cursor> {
michael@0:         @Override
michael@0:         public Loader<Cursor> onCreateLoader(int id, Bundle args) {
michael@0:             return new LastTabsCursorLoader(getActivity());
michael@0:         }
michael@0: 
michael@0:         @Override
michael@0:         public void onLoadFinished(Loader<Cursor> loader, Cursor c) {
michael@0:             mAdapter.swapCursor(c);
michael@0:             updateUiFromCursor(c);
michael@0:         }
michael@0: 
michael@0:         @Override
michael@0:         public void onLoaderReset(Loader<Cursor> loader) {
michael@0:             mAdapter.swapCursor(null);
michael@0:         }
michael@0:     }
michael@0: }