dev.drsoran.moloko.fragments.NoteEditFragment.java Source code

Introduction

Here is the source code for dev.drsoran.moloko.fragments.NoteEditFragment.java

Source

/* 
 *   Copyright (c) 2012 Ronny Rhricht
 *
 *   This file is part of Moloko.
 *
 *   Moloko is free software: you can redistribute it and/or modify
 *   it under the terms of the GNU General Public License as published by
 *   the Free Software Foundation, either version 3 of the License, or
 *   (at your option) any later version.
 *
 *   Moloko is distributed in the hope that it will be useful,
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *   GNU General Public License for more details.
 *
 *   You should have received a copy of the GNU General Public License
 *   along with Moloko.  If not, see <http://www.gnu.org/licenses/>.
 *
 *   Contributors:
 * Ronny Rhricht - implementation
 */

package dev.drsoran.moloko.fragments;

import android.app.Activity;
import android.database.ContentObserver;
import android.os.Bundle;
import android.support.v4.app.LoaderManager.LoaderCallbacks;
import android.support.v4.content.Loader;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;

import com.mdt.rtm.data.RtmTaskNote;

import dev.drsoran.moloko.ApplyChangesInfo;
import dev.drsoran.moloko.IHandlerToken;
import dev.drsoran.moloko.MolokoApp;
import dev.drsoran.moloko.R;
import dev.drsoran.moloko.annotations.InstanceState;
import dev.drsoran.moloko.format.MolokoDateFormatter;
import dev.drsoran.moloko.fragments.listeners.INoteEditFragmentListener;
import dev.drsoran.moloko.loaders.RtmTaskNoteLoader;
import dev.drsoran.moloko.sync.util.SyncUtils;
import dev.drsoran.moloko.util.Intents;
import dev.drsoran.moloko.util.NoteEditUtils;
import dev.drsoran.moloko.util.Queries;
import dev.drsoran.moloko.util.Strings;
import dev.drsoran.moloko.util.UIUtils;
import dev.drsoran.provider.Rtm.Notes;

public class NoteEditFragment extends AbstractNoteEditFragment implements LoaderCallbacks<RtmTaskNote> {
    private final IHandlerToken handler = MolokoApp.acquireHandlerToken();

    @InstanceState(key = Intents.Extras.KEY_NOTE)
    private RtmTaskNote note;

    private ContentObserver noteChangesObserver;

    private INoteEditFragmentListener listener;

    public final static NoteEditFragment newInstance(Bundle config) {
        final NoteEditFragment fragment = new NoteEditFragment();

        fragment.setArguments(config);

        return fragment;
    }

    public NoteEditFragment() {
        registerAnnotatedConfiguredInstance(this, NoteEditFragment.class);
    }

    @Override
    public void onAttach(Activity activity) {
        super.onAttach(activity);

        if (activity instanceof INoteEditFragmentListener) {
            listener = (INoteEditFragmentListener) activity;
        } else {
            listener = null;
        }
    }

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        registerForNoteDeletedByBackgroundSync();
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        final View fragmentView = super.onCreateView(inflater, container, savedInstanceState);

        showNote(fragmentView, getNoteAssertNotNull());

        return fragmentView;
    }

    @Override
    public void onViewCreated(View view, Bundle savedInstanceState) {
        super.onViewCreated(view, savedInstanceState);
        text.requestFocus();
    }

    @Override
    public void onDestroy() {
        unregisterForNoteDeletedByBackgroundSync();
        handler.release();

        super.onDestroy();
    }

    @Override
    public void onDetach() {
        listener = null;
        super.onDetach();
    }

    @Override
    public String getNoteTitle() {
        return title.getText().toString();
    }

    @Override
    public String getNoteText() {
        return text.getText().toString();
    }

    private void showNote(View content, RtmTaskNote note) {
        final TextView createdDate = (TextView) content.findViewById(R.id.note_created_date);
        createdDate.setText(MolokoDateFormatter.formatDateTime(getSherlockActivity(),
                note.getCreatedDate().getTime(), MolokoDateFormatter.FORMAT_WITH_YEAR));
        title.setText(note.getTitle());
        text.setText(note.getText());
    }

    public RtmTaskNote getNoteAssertNotNull() {
        if (note == null)
            throw new IllegalStateException("note must not be null");

        return note;
    }

    @Override
    public boolean hasChanges() {
        final RtmTaskNote note = getNoteAssertNotNull();

        return SyncUtils.hasChanged(Strings.nullIfEmpty(note.getTitle()),
                Strings.nullIfEmpty(UIUtils.getTrimmedText(title)))
                || SyncUtils.hasChanged(Strings.nullIfEmpty(note.getText()),
                        Strings.nullIfEmpty(UIUtils.getTrimmedText(text)));
    }

    @Override
    protected ApplyChangesInfo getChanges() {
        final String title = UIUtils.getTrimmedText(this.title);
        final String text = UIUtils.getTrimmedText(this.text);

        final RtmTaskNote note = getNoteAssertNotNull();
        final ApplyChangesInfo modifications = NoteEditUtils.setNoteTitleAndText(getSherlockActivity(),
                note.getId(), title, text);

        return modifications;
    }

    @Override
    public Loader<RtmTaskNote> onCreateLoader(int id, Bundle args) {
        return new RtmTaskNoteLoader(getSherlockActivity(), getNoteAssertNotNull().getId());
    }

    @Override
    public void onLoadFinished(Loader<RtmTaskNote> loader, RtmTaskNote data) {
        // If the database changed by a background sync and the assigned note
        // has been deleted, then we ask the user if he wants to keep his changes
        // or drop the note.
        if (data == null) {
            handler.post(new Runnable() {
                @Override
                public void run() {
                    if (listener != null) {
                        listener.onBackgroundDeletion(getNoteAssertNotNull());
                    }
                }
            });
        }
    }

    @Override
    public void onLoaderReset(Loader<RtmTaskNote> loader) {
    }

    private void registerForNoteDeletedByBackgroundSync() {
        noteChangesObserver = new ContentObserver(MolokoApp.getHandler()) {
            @Override
            public void onChange(boolean selfChange) {
                getSherlockActivity().getSupportLoaderManager().initLoader(RtmTaskNoteLoader.ID, Bundle.EMPTY,
                        NoteEditFragment.this);
            }
        };

        getSherlockActivity().getContentResolver().registerContentObserver(
                Queries.contentUriWithId(Notes.CONTENT_URI, getNoteAssertNotNull().getId()), false,
                noteChangesObserver);
    }

    private void unregisterForNoteDeletedByBackgroundSync() {
        getSherlockActivity().getContentResolver().unregisterContentObserver(noteChangesObserver);
        noteChangesObserver = null;
    }
}