HelpActivity.java

/*
   Activity that displays the help pages
 
   Copyright 2013 Thincast Technologies GmbH, Author: Martin Fleisz
 
   This Source Code Form is subject to the terms of the Mozilla Public License, v. 2.0.
   If a copy of the MPL was not distributed with this file, You can obtain one at
   http://mozilla.org/MPL/2.0/.
*/
 
package com.freerdp.freerdpcore.presentation;
 
import android.content.res.Configuration;
import android.os.Bundle;
import android.util.Log;
import android.webkit.WebSettings;
import android.webkit.WebView;
import android.webkit.WebViewClient;
 
import androidx.appcompat.app.AppCompatActivity;
 
import com.freerdp.freerdpcore.R;
 
import java.io.IOException;
import java.io.InputStream;
import java.util.Locale;
 
public class HelpActivity extends AppCompatActivity
{
  private static final String TAG = HelpActivity.class.toString();
  private WebView mWebView;
 
  @Override public void onCreate(Bundle savedInstanceState)
  {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_help);
 
    if (getSupportActionBar() != null)
      getSupportActionBar().setDisplayHomeAsUpEnabled(true);
 
    mWebView = findViewById(R.id.activity_help_webview);
 
    WebSettings settings = mWebView.getSettings();
    settings.setDomStorageEnabled(true);
    settings.setUseWideViewPort(true);
    settings.setLoadWithOverviewMode(true);
    settings.setSupportZoom(true);
    settings.setJavaScriptEnabled(true);
    settings.setAllowContentAccess(true);
    settings.setAllowFileAccess(true);
 
    mWebView.setWebViewClient(new WebViewClient() {
      @Override public boolean shouldOverrideUrlLoading(WebView view, String url)
      {
        if (url.startsWith("file:///android_asset/"))
        {
          view.loadUrl(url);
          return true;
        }
        return false;
      }
    });
 
    populate();
  }
 
  @Override public boolean onSupportNavigateUp()
  {
    finish();
    return true;
  }
 
  private void populate()
  {
    String filename;
    if ((getResources().getConfiguration().screenLayout &
         Configuration.SCREENLAYOUT_SIZE_MASK) >= Configuration.SCREENLAYOUT_SIZE_LARGE)
      filename = "gestures.html";
    else
      filename = "gestures_phone.html";
 
    Locale def = Locale.getDefault();
    String prefix = def.getLanguage().toLowerCase(def);
    String dir = prefix + "_help_page/";
    String file = dir + filename;
 
    try
    {
      InputStream is = getAssets().open(file);
      is.close();
    }
    catch (IOException e)
    {
      Log.d(TAG, "No localized asset " + file + ", falling back to default");
      dir = "help_page/";
      file = dir + filename;
    }
 
    mWebView.loadUrl("file:///android_asset/" + file);
  }
}