packages/SystemUI/src/com/android/systemui/media/dialog/MediaOutputBaseAdapter.java

/*
 * Copyright (C) 2020 The Android Open Source Project
 *
 * 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.android.systemui.media.dialog;

import android.content.Context;
import android.graphics.Typeface;
import android.text.TextUtils;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.FrameLayout;
import android.widget.ImageView;
import android.widget.ProgressBar;
import android.widget.RelativeLayout;
import android.widget.SeekBar;
import android.widget.TextView;

import androidx.annotation.NonNull;
import androidx.recyclerview.widget.RecyclerView;

import com.android.settingslib.media.MediaDevice;
import com.android.systemui.R;

/**
 * Base adapter for media output dialog.
 */
public abstract class MediaOutputBaseAdapter extends
        RecyclerView.Adapter<MediaOutputBaseAdapter.MediaDeviceBaseViewHolder> {

    private static final String FONT_SELECTED_TITLE = "sans-serif-medium";
    private static final String FONT_TITLE = "sans-serif";

    static final int CUSTOMIZED_ITEM_PAIR_NEW = 1;

    final MediaOutputController mController;

    private boolean mIsDragging;
    private int mMargin;

    Context mContext;
    View mHolderView;

    public MediaOutputBaseAdapter(MediaOutputController controller) {
        mController = controller;
        mIsDragging = false;
    }

    @Override
    public MediaDeviceBaseViewHolder onCreateViewHolder(@NonNull ViewGroup viewGroup,
            int viewType) {
        mContext = viewGroup.getContext();
        mMargin = mContext.getResources().getDimensionPixelSize(
                R.dimen.media_output_dialog_list_margin);
        mHolderView = LayoutInflater.from(mContext).inflate(R.layout.media_output_list_item,
                viewGroup, false);

        return null;
    }

    CharSequence getItemTitle(MediaDevice device) {
        return device.getName();
    }

    boolean isCurrentConnected(MediaDevice device) {
        return TextUtils.equals(device.getId(),
                mController.getCurrentConnectedMediaDevice().getId());
    }

    boolean isDragging() {
        return mIsDragging;
    }

    /**
     * ViewHolder for binding device view.
     */
    abstract class MediaDeviceBaseViewHolder extends RecyclerView.ViewHolder {
        final FrameLayout mFrameLayout;
        final TextView mTitleText;
        final TextView mTwoLineTitleText;
        final TextView mSubTitleText;
        final ImageView mTitleIcon;
        final ImageView mEndIcon;
        final ProgressBar mProgressBar;
        final SeekBar mSeekBar;
        final RelativeLayout mTwoLineLayout;

        MediaDeviceBaseViewHolder(View view) {
            super(view);
            mFrameLayout = view.requireViewById(R.id.device_container);
            mTitleText = view.requireViewById(R.id.title);
            mSubTitleText = view.requireViewById(R.id.subtitle);
            mTwoLineLayout = view.requireViewById(R.id.two_line_layout);
            mTwoLineTitleText = view.requireViewById(R.id.two_line_title);
            mTitleIcon = view.requireViewById(R.id.title_icon);
            mEndIcon = view.requireViewById(R.id.end_icon);
            mProgressBar = view.requireViewById(R.id.volume_indeterminate_progress);
            mSeekBar = view.requireViewById(R.id.volume_seekbar);
        }

        void onBind(MediaDevice device, boolean topMargin, boolean bottomMargin) {
            mTitleIcon.setImageIcon(mController.getDeviceIconCompat(device).toIcon(mContext));
            setMargin(topMargin, bottomMargin);
        }

        void onBind(int customizedItem, boolean topMargin, boolean bottomMargin) {
            setMargin(topMargin, bottomMargin);
        }

        private void setMargin(boolean topMargin, boolean bottomMargin) {
            ViewGroup.MarginLayoutParams params = (ViewGroup.MarginLayoutParams) mFrameLayout
                    .getLayoutParams();
            if (topMargin) {
                params.topMargin = mMargin;
            }
            if (bottomMargin) {
                params.bottomMargin = mMargin;
            }
            mFrameLayout.setLayoutParams(params);
        }
        void setSingleLineLayout(CharSequence title, boolean bFocused) {
            mTitleText.setVisibility(View.VISIBLE);
            mTwoLineLayout.setVisibility(View.GONE);
            mTitleText.setText(title);
            if (bFocused) {
                mTitleText.setTypeface(Typeface.create(FONT_SELECTED_TITLE, Typeface.NORMAL));
            } else {
                mTitleText.setTypeface(Typeface.create(FONT_TITLE, Typeface.NORMAL));
            }
        }

        void setTwoLineLayout(MediaDevice device, CharSequence title, boolean bFocused,
                boolean showSeekBar, boolean showProgressBar, boolean showSubtitle) {
            mTitleText.setVisibility(View.GONE);
            mTwoLineLayout.setVisibility(View.VISIBLE);
            mSeekBar.setVisibility(showSeekBar ? View.VISIBLE : View.GONE);
            mProgressBar.setVisibility(showProgressBar ? View.VISIBLE : View.GONE);
            mSubTitleText.setVisibility(showSubtitle ? View.VISIBLE : View.GONE);
            if (device == null) {
                mTwoLineTitleText.setText(title);
            } else {
                mTwoLineTitleText.setText(getItemTitle(device));
            }

            if (bFocused) {
                mTwoLineTitleText.setTypeface(Typeface.create(FONT_SELECTED_TITLE,
                        Typeface.NORMAL));
            } else {
                mTwoLineTitleText.setTypeface(Typeface.create(FONT_TITLE, Typeface.NORMAL));
            }
        }

        void initSeekbar(MediaDevice device) {
            mSeekBar.setMax(device.getMaxVolume());
            mSeekBar.setMin(0);
            if (mSeekBar.getProgress() != device.getCurrentVolume()) {
                mSeekBar.setProgress(device.getCurrentVolume());
            }
            mSeekBar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
                @Override
                public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
                    if (device == null || !fromUser) {
                        return;
                    }
                    mController.adjustVolume(device, progress);
                }

                @Override
                public void onStartTrackingTouch(SeekBar seekBar) {
                    mIsDragging = true;
                }

                @Override
                public void onStopTrackingTouch(SeekBar seekBar) {
                    mIsDragging = false;
                }
            });
        }
    }
}