de.elanev.studip.android.app.backend.net.oauth.WebAuthFragment.java Source code

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Here is the source code for de.elanev.studip.android.app.backend.net.oauth.WebAuthFragment.java

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/*
 * Copyright (c) 2014 ELAN e.V.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the GNU Public License v3.0
 * which accompanies this distribution, and is available at
 * http://www.gnu.org/licenses/gpl.html
 */

package de.elanev.studip.android.app.backend.net.oauth;

import android.app.Activity;
import android.graphics.Bitmap;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v7.app.ActionBar;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.MenuItem;
import android.view.MotionEvent;
import android.view.View;
import android.view.ViewGroup;
import android.webkit.WebView;
import android.webkit.WebViewClient;

import de.elanev.studip.android.app.R;
import de.elanev.studip.android.app.util.ApiUtils;

/**
 * @author Jrn
 */
public class WebAuthFragment extends Fragment {
    public static final String TAG = WebAuthFragment.class.getSimpleName();
    public static final String AUTH_URL = "authUrl";
    private OnWebViewAuthListener mCallbacks;
    private WebView mWebView;

    public WebAuthFragment() {
    }

    public static WebAuthFragment newInstance(Bundle arguments) {
        WebAuthFragment fragment = new WebAuthFragment();
        fragment.setArguments(arguments);

        return fragment;
    }

    @Override
    public void onAttach(Activity activity) {
        super.onAttach(activity);
        try {
            mCallbacks = (OnWebViewAuthListener) activity;
        } catch (ClassCastException e) {
            throw new ClassCastException(activity.toString() + "must implement OnWebViewAuthListener");
        }
    }

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

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        switch (item.getItemId()) {
        // Respond to the action bar's Up/Home button
        case android.R.id.home:
            mCallbacks.onAuthCancelled();
            return true;
        }
        return super.onOptionsItemSelected(item);
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        View v = inflater.inflate(R.layout.webview_view, container, false);
        mWebView = (WebView) v.findViewById(R.id.webView);
        v.findViewById(R.id.toolbar).setVisibility(View.GONE); // Hide doubled toolbar
        return v;
    }

    @Override
    public void onActivityCreated(Bundle savedInstanceState) {
        super.onActivityCreated(savedInstanceState);

        ActionBar actionBar = ((AppCompatActivity) getActivity()).getSupportActionBar();
        if (actionBar != null) {
            actionBar.setDisplayHomeAsUpEnabled(true);
        }
        setHasOptionsMenu(true);

        String url = getArguments().getString(AUTH_URL);
        mWebView.setWebViewClient(new LoginWebViewClient());

        // Workaround for embedded WebView Bug in Android 2.3,
        // https://code.google.com/p/android/issues/detail?id=7189
        if (!ApiUtils.isOverApi11()) {
            mWebView.requestFocus(View.FOCUS_DOWN);
            mWebView.setOnTouchListener(new View.OnTouchListener() {

                public boolean onTouch(View v, MotionEvent event) {
                    switch (event.getAction()) {
                    case MotionEvent.ACTION_DOWN:
                    case MotionEvent.ACTION_UP:
                        if (!v.hasFocus()) {
                            v.requestFocus();
                        }
                        break;
                    }
                    return false;
                }
            });
        }
        mWebView.loadUrl(url);
    }

    public interface OnWebViewAuthListener {
        public void onAuthSuccess();

        public void onAuthCancelled();
    }

    /* WebviewClient which overrides the onPageStarted method to intercept the OAuth result */
    private class LoginWebViewClient extends WebViewClient {
        private final String TAG = LoginWebViewClient.class.getCanonicalName();

        @Override
        public void onPageStarted(WebView view, String url, Bitmap favicon) {
            Log.i(TAG, url);
            if (url.contains("user")) {
                if (mCallbacks != null) {
                    mCallbacks.onAuthSuccess();
                }
            } else if (url.endsWith("restipplugin/oauth/oob") || url.contains("logout=true")) {
                if (mCallbacks != null) {
                    mCallbacks.onAuthCancelled();
                }
            }
        }
    }
}