CommentPreviewPagerAdapter.java

/*
 * Copyright (c) 2015 PocketHub
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.github.pockethub.android.ui.comment;

import android.content.Context;
import android.support.v4.app.Fragment;
import android.support.v7.app.AppCompatActivity;

import com.github.pockethub.android.R;
import com.github.pockethub.android.ui.FragmentPagerAdapter;
import com.meisolsson.githubsdk.model.Repository;

/**
 * Pager of a raw and rendered comment text
 */
public class CommentPreviewPagerAdapter extends FragmentPagerAdapter {
    private final Repository repo;
    private RawCommentFragment textFragment;
    private RenderedCommentFragment htmlFragment;

    /**
     * Text to populate comment window.
     */
    private String initComment;

    private Context context;

    /**
     * @param activity
     * @param repo
     */
    public CommentPreviewPagerAdapter(AppCompatActivity activity, Repository repo) {
        super(activity);
        this.context = activity.getApplicationContext();
        this.repo = repo;
    }

    @Override
    public Fragment getItem(final int position) {
        switch (position) {
        case 0:
            textFragment = new RawCommentFragment();
            textFragment.setText(initComment);
            return textFragment;
        case 1:
            htmlFragment = new RenderedCommentFragment();
            return htmlFragment;
        default:
            return null;
        }
    }

    @Override
    public int getCount() {
        return 2;
    }

    /**
     * Get comment text
     *
     * @return text
     */
    public String getCommentText() {
        if (textFragment == null) {
            textFragment = (RawCommentFragment) getFragmentByPosition(0);
        }

        return textFragment != null ? textFragment.getText() : null;
    }

    /**
     * Set comment text
     *
     * @return text
     */
    public void setCommentText(String comment) {
        if (textFragment != null) {
            textFragment.setText(comment);
        }
        initComment = comment;
    }

    /**
     * Set current item
     *
     * @param position
     * @return this adapter
     */
    public CommentPreviewPagerAdapter setCurrentItem(int position) {
        if (position == 1 && htmlFragment != null) {
            htmlFragment.setText(getCommentText(), repo);
        }
        return this;
    }

    @Override
    public CharSequence getPageTitle(int position) {
        switch (position) {
            case 0:
                return context.getResources().getString(R.string.write);
            case 1:
                return context.getResources().getString(R.string.preview);
            default:
                return "";
        }
    }
}