NoteListFragment.java

package com.orgzly.android.ui.fragments;

import android.os.Bundle;
import android.support.v4.app.ListFragment;
import android.support.v7.view.ActionMode;
import android.view.View;

import com.orgzly.R;
import com.orgzly.android.Note;
import com.orgzly.android.Shelf;
import com.orgzly.android.ui.ActionModeListener;
import com.orgzly.android.ui.FragmentListener;
import com.orgzly.android.ui.HeadsListViewAdapter;
import com.orgzly.android.ui.Place;
import com.orgzly.android.ui.Selection;
import com.orgzly.android.ui.NotePlace;
import com.orgzly.android.ui.dialogs.TimestampDialogFragment;
import com.orgzly.android.ui.views.GesturedListView;
import com.orgzly.org.datetime.OrgDateTime;

import java.util.Set;
import java.util.TreeSet;

/**
 * Fragment which is displaying a list of notes,
 * such as {@link BookFragment} and {@link QueryFragment}.
 */
public abstract class NoteListFragment extends ListFragment {

    protected Shelf mShelf;
    protected Selection mSelection;
    protected ActionModeListener mActionModeListener;

    public abstract String getFragmentTag();

    public abstract ActionMode.Callback getNewActionMode();


    @Override
    public void onSaveInstanceState(Bundle outState) {
        super.onSaveInstanceState(outState);

        /* Selection could be null if fragment is in back stack and there's configuration change. */
        if (mSelection != null) {
            mSelection.saveIds(outState);
        }

        /* Save action mode state (move mode). */
        if (mActionModeListener != null) {
            outState.putBoolean(
                    "actionModeMove", mActionModeListener.getActionMode() != null &&
                            "M".equals(mActionModeListener.getActionMode().getTag()));
        }
    }

    public Selection getSelection() {
        return mSelection;
    }

    public GesturedListView getListView() {
        return (GesturedListView) super.getListView();
    }

    @Override
    public HeadsListViewAdapter getListAdapter() {
        return ((HeadsListViewAdapter) super.getListAdapter());
    }

    protected void displayScheduleTimestampDialog(int id, long noteId) {
        TreeSet<Long> noteIds = new TreeSet<>();
        noteIds.add(noteId);

        displayScheduleTimestampDialog(id, noteIds);
    }

    protected void displayScheduleTimestampDialog(int id, TreeSet<Long> noteIds) {
        OrgDateTime time = null;

        /* If there is only one note, use its time as dialog's default. */
        if (noteIds.size() == 1) {
            time = getScheduledTimeForNote(noteIds.first());
        }

        TimestampDialogFragment f = TimestampDialogFragment.getInstance(
                id,
                R.string.schedule,
                noteIds,
                time);

        f.setTargetFragment(this, 0);

        f.show(getActivity().getSupportFragmentManager(), TimestampDialogFragment.FRAGMENT_TAG);
    }

    private OrgDateTime getScheduledTimeForNote(long id) {
        Note note = mShelf.getNote(id);

        if (note.getHead().hasScheduled()) {
            return note.getHead().getScheduled().getStartTime();
        }

        return null;
    }

    /**
     * Get target note id.
     * If location is above the selected notes, use the first selected note.
     * Otherwise, use the last selected note.
     */
    protected long getTargetNoteIdFromSelection(Place place) {
        return place == Place.ABOVE ?
                mSelection.getIds().first() : mSelection.getIds().last();
    }

    public interface NoteListFragmentListener extends FragmentListener {
        void onNoteScrollToRequest(long noteId);
        void onNoteNewRequest(NotePlace target);
        void onNoteClick(NoteListFragment fragment, View view, int position, long noteId);
        void onNoteLongClick(NoteListFragment fragment, View view, int position, long noteId);

        void onStateChangeRequest(Set<Long> noteIds, String state);
        void onStateCycleRequest(long noteId, int direction);
        void onStateToDoneRequest(long noteId);
        void onScheduledTimeUpdateRequest(Set<Long> noteIds, OrgDateTime time);
    }
}