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 android.app.Activity;
michael@0: import android.content.Context;
michael@0: import android.os.Bundle;
michael@0: import android.support.v4.app.FragmentActivity;
michael@0: import android.support.v4.app.LoaderManager;
michael@0: import android.support.v4.app.LoaderManager.LoaderCallbacks;
michael@0: import android.support.v4.content.Loader;
michael@0: import android.view.LayoutInflater;
michael@0: import android.view.View;
michael@0: import android.view.View.OnClickListener;
michael@0: import android.view.ViewGroup;
michael@0: import android.widget.BaseAdapter;
michael@0: import android.widget.ListView;
michael@0: import android.widget.TextView;
michael@0: import android.widget.Toast;
michael@0: 
michael@0: import java.util.ArrayList;
michael@0: import java.util.Arrays;
michael@0: import java.util.List;
michael@0: 
michael@0: import org.mozilla.gecko.R;
michael@0: import org.mozilla.gecko.home.HomeConfig;
michael@0: import org.mozilla.gecko.home.HomeConfig.PanelConfig;
michael@0: import org.mozilla.gecko.home.PanelInfoManager.RequestCallback;
michael@0: import org.mozilla.gecko.home.PanelInfoManager.PanelInfo;
michael@0: 
michael@0: /**
michael@0:  * Dialog for selecting new home panels to add.
michael@0:  */
michael@0: public class HomePanelPicker extends FragmentActivity {
michael@0:     private static final String LOGTAG = "HomePanelPicker";
michael@0: 
michael@0:     /**
michael@0:      * Intent extra key for caller to pass in a list of existing panel ids.
michael@0:      */
michael@0:     public static final String CURRENT_PANELS_IDS = "currentPanelsIds";
michael@0: 
michael@0:     /**
michael@0:      * Request code when starting the activity with startActivityForResult.
michael@0:      */
michael@0:     public static final int REQUEST_CODE_ADD_PANEL = 1;
michael@0: 
michael@0:     private static final int LOADER_ID_CONFIG = 0;
michael@0: 
michael@0:     private ListView mListView;
michael@0:     private List<String> mCurrentPanelsIds;
michael@0:     private List<PanelInfo> mPanelInfos;
michael@0: 
michael@0:     @Override
michael@0:     public void onCreate(Bundle savedInstance) {
michael@0:         super.onCreate(savedInstance);
michael@0:         setContentView(R.layout.home_panel_picker);
michael@0: 
michael@0:         // Fetch current panel ids from extras bundle, if provided by caller.
michael@0:         Bundle intentExtras = getIntent().getExtras();
michael@0:         if (intentExtras != null) {
michael@0:             String[] panelIdsArray = intentExtras.getStringArray(CURRENT_PANELS_IDS);
michael@0:             if (panelIdsArray != null) {
michael@0:                 mCurrentPanelsIds = Arrays.asList(panelIdsArray);
michael@0:             }
michael@0:         }
michael@0: 
michael@0:         mListView = (ListView) findViewById(R.id.list);
michael@0: 
michael@0:         // Set an empty adapter.
michael@0:         final PickerAdapter adapter = new PickerAdapter(this);
michael@0:         mListView.setAdapter(adapter);
michael@0: 
michael@0:         requestAvailablePanels();
michael@0:     }
michael@0: 
michael@0:     /**
michael@0:      * Get panels and update the adapter to display the ones
michael@0:      * available for install.
michael@0:      */
michael@0:     private void requestAvailablePanels() {
michael@0:         final PanelInfoManager pm = new PanelInfoManager();
michael@0:         pm.requestAvailablePanels(new RequestCallback() {
michael@0:             @Override
michael@0:             public void onComplete(final List<PanelInfo> panelInfos) {
michael@0:                 mPanelInfos = panelInfos;
michael@0: 
michael@0:                 // Fetch current home panels if necessary.
michael@0:                 if (mCurrentPanelsIds == null) {
michael@0:                     loadConfig();
michael@0:                 } else {
michael@0:                     updatePanelsAdapter(mPanelInfos);
michael@0:                 }
michael@0:             }
michael@0:         });
michael@0:     }
michael@0: 
michael@0:     /**
michael@0:      * Fetch panels from HomeConfig.
michael@0:      *
michael@0:      * This is an async call using Loaders.
michael@0:      */
michael@0:     private void loadConfig() {
michael@0:         final ConfigLoaderCallbacks loaderCallbacks = new ConfigLoaderCallbacks();
michael@0:         final LoaderManager lm = HomePanelPicker.this.getSupportLoaderManager();
michael@0:         lm.initLoader(LOADER_ID_CONFIG, null, loaderCallbacks);
michael@0:     }
michael@0: 
michael@0:     /**
michael@0:      * Update the list adapter to contain only available panels (with the
michael@0:      * installed panels filtered out).
michael@0:      *
michael@0:      * @param panelInfos List of all available panels.
michael@0:      */
michael@0:     private void updatePanelsAdapter(List<PanelInfo> panelInfos) {
michael@0:         final List<PanelInfo> availablePanels = new ArrayList<PanelInfo>();
michael@0: 
michael@0:         // Filter out panels that are already displayed.
michael@0:         for (PanelInfo panelInfo : panelInfos) {
michael@0:             if (!mCurrentPanelsIds.contains(panelInfo.getId())) {
michael@0:                 availablePanels.add(panelInfo);
michael@0:             }
michael@0:         }
michael@0: 
michael@0:         if (availablePanels.isEmpty()) {
michael@0:             setContentView(R.layout.home_panel_picker_empty);
michael@0:             return;
michael@0:         }
michael@0: 
michael@0:         final PickerAdapter adapter = (PickerAdapter) mListView.getAdapter();
michael@0:         adapter.updateFromPanelInfos(availablePanels);
michael@0:     }
michael@0: 
michael@0:     private void installNewPanelAndQuit(PanelInfo panelInfo) {
michael@0:         final PanelConfig newPanelConfig = panelInfo.toPanelConfig();
michael@0:         HomePanelsManager.getInstance().installPanel(newPanelConfig);
michael@0:         showToastForNewPanel(newPanelConfig);
michael@0: 
michael@0:         setResult(Activity.RESULT_OK);
michael@0:         finish();
michael@0:     }
michael@0: 
michael@0:     private void showToastForNewPanel(PanelConfig panelConfig) {
michael@0:         String panelName = panelConfig.getTitle();
michael@0: 
michael@0:         // Display toast.
michael@0:         final String successMsg = getResources().getString(R.string.home_add_panel_installed, panelName);
michael@0:         Toast.makeText(this, successMsg, Toast.LENGTH_SHORT).show();
michael@0:     }
michael@0: 
michael@0:     // ViewHolder for rows of the panel picker.
michael@0:     private static class PanelRow {
michael@0:         final TextView title;
michael@0:         int position;
michael@0: 
michael@0:         public PanelRow(View view) {
michael@0:             title = (TextView) view.findViewById(R.id.title);
michael@0:         }
michael@0:     }
michael@0: 
michael@0:     private class PickerAdapter extends BaseAdapter {
michael@0:         private final LayoutInflater mInflater;
michael@0:         private List<PanelInfo> mPanelInfos;
michael@0:         private final OnClickListener mOnClickListener;
michael@0: 
michael@0:         public PickerAdapter(Context context) {
michael@0:             this(context, null);
michael@0:         }
michael@0: 
michael@0:         public PickerAdapter(Context context, List<PanelInfo> panelInfos) {
michael@0:             mInflater = LayoutInflater.from(context);
michael@0:             mPanelInfos = panelInfos;
michael@0: 
michael@0:             mOnClickListener = new OnClickListener() {
michael@0:                 @Override
michael@0:                 public void onClick(View view) {
michael@0:                     final PanelRow panelsRow = (PanelRow) view.getTag();
michael@0:                     installNewPanelAndQuit(mPanelInfos.get(panelsRow.position));
michael@0:                 }
michael@0:             };
michael@0:         }
michael@0: 
michael@0:         @Override
michael@0:         public int getCount() {
michael@0:             if (mPanelInfos == null) {
michael@0:                 return 0;
michael@0:             }
michael@0: 
michael@0:             return mPanelInfos.size();
michael@0:         }
michael@0: 
michael@0:         @Override
michael@0:         public PanelInfo getItem(int position) {
michael@0:             if (mPanelInfos == null) {
michael@0:                 return null;
michael@0:             }
michael@0: 
michael@0:             return mPanelInfos.get(position);
michael@0:         }
michael@0: 
michael@0:         @Override
michael@0:         public long getItemId(int position) {
michael@0:             return position;
michael@0:         }
michael@0: 
michael@0:         @Override
michael@0:         public View getView(int position, View convertView, ViewGroup parent) {
michael@0:             PanelRow row;
michael@0: 
michael@0:             if (convertView == null) {
michael@0:                 convertView = mInflater.inflate(R.layout.home_panel_picker_row, null);
michael@0:                 convertView.setOnClickListener(mOnClickListener);
michael@0: 
michael@0:                 row = new PanelRow(convertView);
michael@0:                 convertView.setTag(row);
michael@0:             } else {
michael@0:                 row = (PanelRow) convertView.getTag();
michael@0:             }
michael@0: 
michael@0:             row.title.setText(mPanelInfos.get(position).getTitle());
michael@0:             row.position = position;
michael@0: 
michael@0:             return convertView;
michael@0:         }
michael@0: 
michael@0:         public void updateFromPanelInfos(List<PanelInfo> panelInfos) {
michael@0:             mPanelInfos = panelInfos;
michael@0:             notifyDataSetChanged();
michael@0:         }
michael@0:     }
michael@0: 
michael@0:     /**
michael@0:      * Fetch installed Home panels and update the adapter for this activity.
michael@0:      */
michael@0:     private class ConfigLoaderCallbacks implements LoaderCallbacks<HomeConfig.State> {
michael@0:         @Override
michael@0:         public Loader<HomeConfig.State> onCreateLoader(int id, Bundle args) {
michael@0:             final HomeConfig homeConfig = HomeConfig.getDefault(HomePanelPicker.this);
michael@0:             return new HomeConfigLoader(HomePanelPicker.this, homeConfig);
michael@0:         }
michael@0: 
michael@0:         @Override
michael@0:         public void onLoadFinished(Loader<HomeConfig.State> loader, HomeConfig.State configState) {
michael@0:             mCurrentPanelsIds = new ArrayList<String>();
michael@0:             for (PanelConfig panelConfig : configState) {
michael@0:                 mCurrentPanelsIds.add(panelConfig.getId());
michael@0:             }
michael@0: 
michael@0:             updatePanelsAdapter(mPanelInfos);
michael@0:         }
michael@0: 
michael@0:         @Override
michael@0:         public void onLoaderReset(Loader<HomeConfig.State> loader) {}
michael@0:     }
michael@0: }