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.List;
michael@0: 
michael@0: import org.mozilla.gecko.R;
michael@0: import org.mozilla.gecko.db.BrowserContract.Bookmarks;
michael@0: import org.mozilla.gecko.db.BrowserDB;
michael@0: import org.mozilla.gecko.home.BookmarksListAdapter.FolderInfo;
michael@0: import org.mozilla.gecko.home.BookmarksListAdapter.OnRefreshFolderListener;
michael@0: import org.mozilla.gecko.home.BookmarksListAdapter.RefreshType;
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.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.ImageView;
michael@0: import android.widget.TextView;
michael@0: 
michael@0: /**
michael@0:  * A page in about:home that displays a ListView of bookmarks.
michael@0:  */
michael@0: public class BookmarksPanel extends HomeFragment {
michael@0:     public static final String LOGTAG = "GeckoBookmarksPanel";
michael@0: 
michael@0:     // Cursor loader ID for list of bookmarks.
michael@0:     private static final int LOADER_ID_BOOKMARKS_LIST = 0;
michael@0: 
michael@0:     // Information about the target bookmarks folder.
michael@0:     private static final String BOOKMARKS_FOLDER_INFO = "folder_info";
michael@0: 
michael@0:     // Refresh type for folder refreshing loader.
michael@0:     private static final String BOOKMARKS_REFRESH_TYPE = "refresh_type";
michael@0: 
michael@0:     // List of bookmarks.
michael@0:     private BookmarksListView mList;
michael@0: 
michael@0:     // Adapter for list of bookmarks.
michael@0:     private BookmarksListAdapter mListAdapter;
michael@0: 
michael@0:     // Adapter's parent stack.
michael@0:     private List<FolderInfo> mSavedParentStack;
michael@0: 
michael@0:     // Reference to the View to display when there are no results.
michael@0:     private View mEmptyView;
michael@0: 
michael@0:     // Callback for cursor loaders.
michael@0:     private CursorLoaderCallbacks mLoaderCallbacks;
michael@0: 
michael@0:     @Override
michael@0:     public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
michael@0:         final View view = inflater.inflate(R.layout.home_bookmarks_panel, container, false);
michael@0: 
michael@0:         mList = (BookmarksListView) view.findViewById(R.id.bookmarks_list);
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 int type = cursor.getInt(cursor.getColumnIndexOrThrow(Bookmarks.TYPE));
michael@0:                 if (type == Bookmarks.TYPE_FOLDER) {
michael@0:                     // We don't show a context menu for folders
michael@0:                     return null;
michael@0:                 }
michael@0:                 final HomeContextMenuInfo info = new HomeContextMenuInfo(view, position, id);
michael@0:                 info.url = cursor.getString(cursor.getColumnIndexOrThrow(Bookmarks.URL));
michael@0:                 info.title = cursor.getString(cursor.getColumnIndexOrThrow(Bookmarks.TITLE));
michael@0:                 info.bookmarkId = cursor.getInt(cursor.getColumnIndexOrThrow(Bookmarks._ID));
michael@0:                 return info;
michael@0:             }
michael@0:         });
michael@0: 
michael@0:         return view;
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:         OnUrlOpenListener listener = null;
michael@0:         try {
michael@0:             listener = (OnUrlOpenListener) getActivity();
michael@0:         } catch (ClassCastException e) {
michael@0:             throw new ClassCastException(getActivity().toString()
michael@0:                     + " must implement HomePager.OnUrlOpenListener");
michael@0:         }
michael@0: 
michael@0:         mList.setTag(HomePager.LIST_TAG_BOOKMARKS);
michael@0:         mList.setOnUrlOpenListener(listener);
michael@0: 
michael@0:         registerForContextMenu(mList);
michael@0:     }
michael@0: 
michael@0:     @Override
michael@0:     public void onActivityCreated(Bundle savedInstanceState) {
michael@0:         super.onActivityCreated(savedInstanceState);
michael@0: 
michael@0:         final Activity activity = getActivity();
michael@0: 
michael@0:         // Setup the list adapter.
michael@0:         mListAdapter = new BookmarksListAdapter(activity, null, mSavedParentStack);
michael@0:         mListAdapter.setOnRefreshFolderListener(new OnRefreshFolderListener() {
michael@0:             @Override
michael@0:             public void onRefreshFolder(FolderInfo folderInfo, RefreshType refreshType) {
michael@0:                 // Restart the loader with folder as the argument.
michael@0:                 Bundle bundle = new Bundle();
michael@0:                 bundle.putParcelable(BOOKMARKS_FOLDER_INFO, folderInfo);
michael@0:                 bundle.putParcelable(BOOKMARKS_REFRESH_TYPE, refreshType);
michael@0:                 getLoaderManager().restartLoader(LOADER_ID_BOOKMARKS_LIST, bundle, mLoaderCallbacks);
michael@0:             }
michael@0:         });
michael@0:         mList.setAdapter(mListAdapter);
michael@0: 
michael@0:         // Create callbacks before the initial loader is started.
michael@0:         mLoaderCallbacks = new CursorLoaderCallbacks();
michael@0:         loadIfVisible();
michael@0:     }
michael@0: 
michael@0:     @Override
michael@0:     public void onDestroyView() {
michael@0:         mList = null;
michael@0:         mListAdapter = null;
michael@0:         mEmptyView = null;
michael@0:         super.onDestroyView();
michael@0:     }
michael@0: 
michael@0:     @Override
michael@0:     public void onConfigurationChanged(Configuration newConfig) {
michael@0:         super.onConfigurationChanged(newConfig);
michael@0: 
michael@0:         // Reattach the fragment, forcing a reinflation of its view.
michael@0:         // We use commitAllowingStateLoss() instead of commit() here to avoid
michael@0:         // an IllegalStateException. If the phone is rotated while Fennec
michael@0:         // is in the background, onConfigurationChanged() is fired.
michael@0:         // onConfigurationChanged() is called before onResume(), so
michael@0:         // using commit() would throw an IllegalStateException since it can't
michael@0:         // be used between the Activity's onSaveInstanceState() and
michael@0:         // onResume().
michael@0:         if (isVisible()) {
michael@0:             // The parent stack is saved just so that the folder state can be
michael@0:             // restored on rotation.
michael@0:             mSavedParentStack = mListAdapter.getParentStack();
michael@0: 
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:     protected void load() {
michael@0:         getLoaderManager().initLoader(LOADER_ID_BOOKMARKS_LIST, null, mLoaderCallbacks);
michael@0:     }
michael@0: 
michael@0:     private void updateUiFromCursor(Cursor c) {
michael@0:         if ((c == null || c.getCount() == 0) && mEmptyView == null) {
michael@0:             // Set empty page 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_bookmarks_empty);
michael@0: 
michael@0:             final TextView emptyText = (TextView) mEmptyView.findViewById(R.id.home_empty_text);
michael@0:             emptyText.setText(R.string.home_bookmarks_empty);
michael@0: 
michael@0:             mList.setEmptyView(mEmptyView);
michael@0:         }
michael@0:     }
michael@0: 
michael@0:     /**
michael@0:      * Loader for the list for bookmarks.
michael@0:      */
michael@0:     private static class BookmarksLoader extends SimpleCursorLoader {
michael@0:         private final FolderInfo mFolderInfo;
michael@0:         private final RefreshType mRefreshType;
michael@0: 
michael@0:         public BookmarksLoader(Context context) {
michael@0:             this(context, new FolderInfo(Bookmarks.FIXED_ROOT_ID), RefreshType.CHILD);
michael@0:         }
michael@0: 
michael@0:         public BookmarksLoader(Context context, FolderInfo folderInfo, RefreshType refreshType) {
michael@0:             super(context);
michael@0:             mFolderInfo = folderInfo;
michael@0:             mRefreshType = refreshType;
michael@0:         }
michael@0: 
michael@0:         @Override
michael@0:         public Cursor loadCursor() {
michael@0:             return BrowserDB.getBookmarksInFolder(getContext().getContentResolver(), mFolderInfo.id);
michael@0:         }
michael@0: 
michael@0:         @Override
michael@0:         public void onContentChanged() {
michael@0:             // Invalidate the cached value that keeps track of whether or
michael@0:             // not desktop bookmarks exist.
michael@0:             BrowserDB.invalidateCachedState();
michael@0:             super.onContentChanged();
michael@0:         }
michael@0: 
michael@0:         public FolderInfo getFolderInfo() {
michael@0:             return mFolderInfo;
michael@0:         }
michael@0: 
michael@0:         public RefreshType getRefreshType() {
michael@0:             return mRefreshType;
michael@0:         }
michael@0:     }
michael@0: 
michael@0:     /**
michael@0:      * Loader callbacks for the LoaderManager of this fragment.
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:             if (args == null) {
michael@0:                 return new BookmarksLoader(getActivity());
michael@0:             } else {
michael@0:                 FolderInfo folderInfo = (FolderInfo) args.getParcelable(BOOKMARKS_FOLDER_INFO);
michael@0:                 RefreshType refreshType = (RefreshType) args.getParcelable(BOOKMARKS_REFRESH_TYPE);
michael@0:                 return new BookmarksLoader(getActivity(), folderInfo, refreshType);
michael@0:             }
michael@0:         }
michael@0: 
michael@0:         @Override
michael@0:         public void onLoadFinished(Loader<Cursor> loader, Cursor c) {
michael@0:             BookmarksLoader bl = (BookmarksLoader) loader;
michael@0:             mListAdapter.swapCursor(c, bl.getFolderInfo(), bl.getRefreshType());
michael@0:             updateUiFromCursor(c);
michael@0:         }
michael@0: 
michael@0:         @Override
michael@0:         public void onLoaderReset(Loader<Cursor> loader) {
michael@0:             if (mList != null) {
michael@0:                 mListAdapter.swapCursor(null);
michael@0:             }
michael@0:         }
michael@0:     }
michael@0: }