projects/namespace_browser/src/main/java/io/v/android/apps/namespace_browser/ViewUtil.java

// Copyright 2015 The Vanadium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package io.v.android.apps.namespace_browser;

import android.graphics.Typeface;
import android.os.Parcel;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.TextView;

import io.v.v23.naming.GlobReply;

/**
 * ViewUtil contains utilities for managing View types used in the Veyron namespace browser.
 */
public class ViewUtil {
    public static LinearLayout createDirectoryView(String text, GlobReply entry,
                                                   LayoutInflater inflater) {
        LinearLayout dirView = (LinearLayout) inflater.inflate(R.layout.directory_item, null);
        dirView.setTag(entry);
        ((TextView) dirView.findViewById(R.id.name)).setText(text);
        updateDirectoryView(dirView, false);
        return dirView;
    }

    public static LinearLayout createObjectView(String text, GlobReply entry,
                                                LayoutInflater inflater) {
        LinearLayout objView = (LinearLayout) inflater.inflate(R.layout.object_item, null);
        objView.setTag(entry);
        ((TextView) objView.findViewById(R.id.name)).setText(text);
        updateObjectView(objView, false);
        return objView;
    }

    public static LinearLayout createMethodView(String text, GlobReply entry,
                                                LayoutInflater inflater) {
        LinearLayout methodView = (LinearLayout) inflater.inflate(R.layout.method_item, null);
        methodView.setTag(entry);
        ((TextView) methodView.findViewById(R.id.name)).setText(text);
        return methodView;
    }

    public static void updateDirectoryView(LinearLayout dirView, boolean isActivated) {
        dirView.setActivated(isActivated);
        ((TextView) dirView.findViewById(R.id.name)).setTypeface(
                dirView.isActivated() ? Typeface.DEFAULT_BOLD : Typeface.DEFAULT);
        ((ImageView) dirView.findViewById(R.id.arrow)).setRotation(dirView.isActivated() ? 0 : 180);
    }

    public static void updateObjectView(LinearLayout objView, boolean isActivated) {
        objView.setActivated(isActivated);
        ((TextView) objView.findViewById(R.id.name)).setTypeface(
                objView.isActivated() ? Typeface.DEFAULT_BOLD : Typeface.DEFAULT);
        ((ImageView) objView.findViewById(R.id.sign)).setImageResource(
                objView.isActivated() ? R.drawable.minus_sign : R.drawable.plus_sign);
    }

    public static void serializeView(View view, Parcel parcel) {
        int id = view.getId();
        parcel.writeInt(id);
        switch (id) {
            case R.id.directory:
                serializeDirectoryView((LinearLayout) view, parcel);
                return;
            case R.id.object:
                serializeObjectView((LinearLayout) view, parcel);
                return;
            case R.id.method:
                serializeMethodView((LinearLayout) view, parcel);
                return;
            default:
                throw new RuntimeException("Serializing unknown view type with id: " + id);
        }
    }

    public static View deserializeView(Parcel parcel, LayoutInflater inflater) {
        int id = parcel.readInt();
        switch (id) {
            case R.id.directory:
                return deserializeDirectoryView(parcel, inflater);
            case R.id.object:
                return deserializeObjectView(parcel, inflater);
            case R.id.method:
                return deserializeMethodView(parcel, inflater);
            default:
                throw new RuntimeException("Deserializing unknown view type with id: " + id);
        }
    }

    private static void serializeDirectoryView(LinearLayout dirView, Parcel parcel) {
        //Save own view state.
        parcel.writeString(((TextView) dirView.findViewById(R.id.name)).getText().toString());
        parcel.writeByte((byte) (dirView.isActivated() ? 1 : 0));
        parcel.writeInt(dirView.getChildCount());
        GlobReply entry = (GlobReply) dirView.getTag();
        parcel.writeSerializable(entry);

        // Save child view state.
        for (int i = 1; i < dirView.getChildCount(); ++i) {
            serializeView(dirView.getChildAt(i), parcel);
        }
    }

    private static void serializeObjectView(LinearLayout objView, Parcel parcel) {
        // Save own view state.
        parcel.writeString(((TextView) objView.findViewById(R.id.name)).getText().toString());
        parcel.writeByte((byte) (objView.isActivated() ? 1 : 0));
        parcel.writeInt(objView.getChildCount());
        GlobReply entry = (GlobReply) objView.getTag();
        parcel.writeSerializable(entry);

        // Save child view state.
        for (int i = 1; i < objView.getChildCount(); ++i) {
            serializeView(objView.getChildAt(i), parcel);
        }
    }

    private static void serializeMethodView(LinearLayout methodView, Parcel parcel) {
        // Save own view state.
        parcel.writeString(((TextView) methodView.findViewById(R.id.name)).getText().toString());
        parcel.writeByte((byte) (methodView.isActivated() ? 1 : 0));
        parcel.writeInt(methodView.getChildCount());
        GlobReply entry = (GlobReply) methodView.getTag();
        parcel.writeSerializable(entry);

        // Save child view state.
        for (int i = 1; i < methodView.getChildCount(); ++i) {
            serializeView(methodView.getChildAt(i), parcel);
        }
    }

    private static LinearLayout deserializeDirectoryView(Parcel parcel, LayoutInflater inflater) {
        // Restore own view state.
        String text = parcel.readString();
        boolean isActivated = (parcel.readByte() == 1);
        int numChildren = parcel.readInt();
        GlobReply entry = (GlobReply) parcel.readSerializable();
        LinearLayout dirView = createDirectoryView(text, entry, inflater);
        updateDirectoryView(dirView, isActivated);

        // Restore child view state.
        for (int i = 1; i < numChildren; i++) {
            dirView.addView(deserializeView(parcel, inflater));
        }
        return dirView;
    }

    private static LinearLayout deserializeObjectView(Parcel parcel, LayoutInflater inflater) {
        // Restore own view state.
        String text = parcel.readString();
        boolean isActivated = (parcel.readByte() == 1);
        int numChildren = parcel.readInt();
        GlobReply entry = (GlobReply) parcel.readSerializable();
        LinearLayout objView = createObjectView(text, entry, inflater);
        updateObjectView(objView, isActivated);

        // Restore child view state.
        for (int i = 1; i < numChildren; i++) {
            objView.addView(deserializeView(parcel, inflater));
        }
        return objView;
    }

    private static LinearLayout deserializeMethodView(Parcel parcel, LayoutInflater inflater) {
        // Restore own view state.
        String text = parcel.readString();
        @SuppressWarnings("unused")
        boolean isActivated = (parcel.readByte() == 1);
        int numChildren = parcel.readInt();
        GlobReply entry = (GlobReply) parcel.readSerializable();
        LinearLayout methodView = createMethodView(text, entry, inflater);

        // Restore child view state.
        for (int i = 1; i < numChildren; i++) {
            methodView.addView(deserializeView(parcel, inflater));
        }
        return methodView;
    }
}