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 java.util.EnumSet;
michael@0: 
michael@0: import org.mozilla.gecko.R;
michael@0: import org.mozilla.gecko.ReaderModeUtils;
michael@0: import org.mozilla.gecko.Telemetry;
michael@0: import org.mozilla.gecko.TelemetryContract;
michael@0: import org.mozilla.gecko.db.BrowserContract.ReadingListItems;
michael@0: import org.mozilla.gecko.db.BrowserDB;
michael@0: import org.mozilla.gecko.db.BrowserDB.URLColumns;
michael@0: import org.mozilla.gecko.home.HomePager.OnUrlOpenListener;
michael@0: 
michael@0: import android.app.Activity;
michael@0: import android.content.Context;
michael@0: import android.content.res.Configuration;
michael@0: import android.database.Cursor;
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.text.SpannableStringBuilder;
michael@0: import android.text.Spanned;
michael@0: import android.text.style.ImageSpan;
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.TextView;
michael@0: 
michael@0: /**
michael@0:  * Fragment that displays reading list contents in a ListView.
michael@0:  */
michael@0: public class ReadingListPanel extends HomeFragment {
michael@0: 
michael@0:     // Cursor loader ID for reading list
michael@0:     private static final int LOADER_ID_READING_LIST = 0;
michael@0: 
michael@0:     // Formatted string in hint text to be replaced with an icon.
michael@0:     private final String MATCH_STRING = "%I";
michael@0: 
michael@0:     // Adapter for the list of reading list items
michael@0:     private ReadingListAdapter mAdapter;
michael@0: 
michael@0:     // The view shown by the fragment
michael@0:     private HomeListView mList;
michael@0: 
michael@0:     // Reference to the View to display when there are no results.
michael@0:     private View mEmptyView;
michael@0: 
michael@0:     // Reference to top view.
michael@0:     private View mTopView;
michael@0: 
michael@0:     // Callbacks used for the reading list and favicon cursor loaders
michael@0:     private CursorLoaderCallbacks mCursorLoaderCallbacks;
michael@0: 
michael@0:     // On URL open listener
michael@0:     private OnUrlOpenListener mUrlOpenListener;
michael@0: 
michael@0:     @Override
michael@0:     public void onAttach(Activity activity) {
michael@0:         super.onAttach(activity);
michael@0: 
michael@0:         try {
michael@0:             mUrlOpenListener = (OnUrlOpenListener) activity;
michael@0:         } catch (ClassCastException e) {
michael@0:             throw new ClassCastException(activity.toString()
michael@0:                     + " must implement HomePager.OnUrlOpenListener");
michael@0:         }
michael@0:     }
michael@0: 
michael@0:     @Override
michael@0:     public void onDetach() {
michael@0:         super.onDetach();
michael@0: 
michael@0:         mUrlOpenListener = 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_reading_list_panel, container, false);
michael@0:     }
michael@0: 
michael@0:     @Override
michael@0:     public void onViewCreated(View view, Bundle savedInstanceState) {
michael@0:         super.onViewCreated(view, savedInstanceState);
michael@0: 
michael@0:         mTopView = view;
michael@0: 
michael@0:         mList = (HomeListView) view.findViewById(R.id.list);
michael@0:         mList.setTag(HomePager.LIST_TAG_READING_LIST);
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:                 String url = c.getString(c.getColumnIndexOrThrow(URLColumns.URL));
michael@0:                 url = ReaderModeUtils.getAboutReaderForUrl(url);
michael@0: 
michael@0:                 Telemetry.sendUIEvent(TelemetryContract.Event.LOAD_URL);
michael@0: 
michael@0:                 // This item is a TwoLinePageRow, so we allow switch-to-tab.
michael@0:                 mUrlOpenListener.onUrlOpen(url, EnumSet.of(OnUrlOpenListener.Flags.ALLOW_SWITCH_TO_TAB));
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(ReadingListItems.URL));
michael@0:                 info.title = cursor.getString(cursor.getColumnIndexOrThrow(ReadingListItems.TITLE));
michael@0:                 info.readingListItemId = cursor.getInt(cursor.getColumnIndexOrThrow(ReadingListItems._ID));
michael@0:                 return info;
michael@0:             }
michael@0:         });
michael@0:         registerForContextMenu(mList);
michael@0:     }
michael@0: 
michael@0:     @Override
michael@0:     public void onDestroyView() {
michael@0:         super.onDestroyView();
michael@0:         mList = null;
michael@0:         mTopView = null;
michael@0:         mEmptyView = null;
michael@0:     }
michael@0: 
michael@0:     @Override
michael@0:     public void onConfigurationChanged(Configuration newConfig) {
michael@0:         super.onConfigurationChanged(newConfig);
michael@0: 
michael@0:         // Detach and reattach the fragment as the layout changes.
michael@0:         if (isVisible()) {
michael@0:             getFragmentManager().beginTransaction()
michael@0:                                 .detach(this)
michael@0:                                 .attach(this)
michael@0:                                 .commitAllowingStateLoss();
michael@0:         }
michael@0:     }
michael@0: 
michael@0:     @Override
michael@0:     public void onActivityCreated(Bundle savedInstanceState) {
michael@0:         super.onActivityCreated(savedInstanceState);
michael@0: 
michael@0:         mAdapter = new ReadingListAdapter(getActivity(), null);
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:     @Override
michael@0:     protected void load() {
michael@0:         getLoaderManager().initLoader(LOADER_ID_READING_LIST, null, mCursorLoaderCallbacks);
michael@0:     }
michael@0: 
michael@0:     private void updateUiFromCursor(Cursor c) {
michael@0:         // We delay setting the empty view until the cursor is actually empty.
michael@0:         // This avoids image flashing.
michael@0:         if ((c == null || c.getCount() == 0) && mEmptyView == null) {
michael@0:             final ViewStub emptyViewStub = (ViewStub) mTopView.findViewById(R.id.home_empty_view_stub);
michael@0:             mEmptyView = emptyViewStub.inflate();
michael@0: 
michael@0:             final TextView emptyHint = (TextView) mEmptyView.findViewById(R.id.home_empty_hint);
michael@0:             String readingListHint = emptyHint.getText().toString();
michael@0: 
michael@0:             // Use an ImageSpan to include the reader icon in the "Tip".
michael@0:             int imageSpanIndex = readingListHint.indexOf(MATCH_STRING);
michael@0:             if (imageSpanIndex != -1) {
michael@0:                 final ImageSpan readingListIcon = new ImageSpan(getActivity(), R.drawable.reader_cropped, ImageSpan.ALIGN_BOTTOM);
michael@0:                 final SpannableStringBuilder hintBuilder = new SpannableStringBuilder(readingListHint);
michael@0: 
michael@0:                 // Add additional spacing.
michael@0:                 hintBuilder.insert(imageSpanIndex + MATCH_STRING.length(), " ");
michael@0:                 hintBuilder.insert(imageSpanIndex, " ");
michael@0: 
michael@0:                 // Add icon.
michael@0:                 hintBuilder.setSpan(readingListIcon, imageSpanIndex + 1, imageSpanIndex + MATCH_STRING.length() + 1, Spanned.SPAN_INCLUSIVE_INCLUSIVE);
michael@0: 
michael@0:                 emptyHint.setText(hintBuilder, TextView.BufferType.SPANNABLE);
michael@0:             }
michael@0: 
michael@0:             mList.setEmptyView(mEmptyView);
michael@0:         }
michael@0:     }
michael@0: 
michael@0:     /**
michael@0:      * Cursor loader for the list of reading list items.
michael@0:      */
michael@0:     private static class ReadingListLoader extends SimpleCursorLoader {
michael@0:         public ReadingListLoader(Context context) {
michael@0:             super(context);
michael@0:         }
michael@0: 
michael@0:         @Override
michael@0:         public Cursor loadCursor() {
michael@0:             return BrowserDB.getReadingList(getContext().getContentResolver());
michael@0:         }
michael@0:     }
michael@0: 
michael@0:     /**
michael@0:      * Cursor adapter for the list of reading list items.
michael@0:      */
michael@0:     private class ReadingListAdapter extends CursorAdapter {
michael@0:         public ReadingListAdapter(Context context, Cursor cursor) {
michael@0:             super(context, cursor, 0);
michael@0:         }
michael@0: 
michael@0:         @Override
michael@0:         public void bindView(View view, Context context, Cursor cursor) {
michael@0:             final ReadingListRow row = (ReadingListRow) view;
michael@0:             row.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(parent.getContext()).inflate(R.layout.reading_list_item_row, parent, false);
michael@0:         }
michael@0:     }
michael@0: 
michael@0:     /**
michael@0:      * LoaderCallbacks implementation that interacts with the LoaderManager.
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 ReadingListLoader(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: }