2 * Copyright 2015-2016 Soren Stoutner <soren@stoutner.com>.
4 * This file is part of Privacy Browser.
6 * Privacy Browser is free software: you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation, either version 3 of the License, or
9 * (at your option) any later version.
11 * Privacy Browser is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with Privacy Browser. If not, see <http://www.gnu.org/licenses/>.
20 package com.stoutner.privacybrowser;
22 import android.annotation.SuppressLint;
23 import android.annotation.TargetApi;
24 import android.app.Activity;
25 import android.app.DownloadManager;
26 import android.content.ClipData;
27 import android.content.ClipboardManager;
28 import android.content.Context;
29 import android.content.Intent;
30 import android.graphics.Bitmap;
31 import android.net.Uri;
32 import android.os.Build;
33 import android.os.Bundle;
34 import android.support.v4.app.DialogFragment;
35 import android.support.v7.app.ActionBar;
36 import android.support.v7.app.AppCompatActivity;
37 import android.support.v7.app.AppCompatDialogFragment;
38 import android.util.Patterns;
39 import android.view.KeyEvent;
40 import android.view.Menu;
41 import android.view.MenuItem;
42 import android.view.View;
43 import android.view.inputmethod.InputMethodManager;
44 import android.webkit.DownloadListener;
45 import android.webkit.WebChromeClient;
46 import android.webkit.WebView;
47 import android.webkit.WebViewClient;
48 import android.widget.EditText;
49 import android.widget.FrameLayout;
50 import android.widget.ImageView;
51 import android.widget.ProgressBar;
52 import android.widget.Toast;
53 import java.io.UnsupportedEncodingException;
54 import java.net.MalformedURLException;
56 import java.net.URLEncoder;
58 public class Webview extends AppCompatActivity implements CreateHomeScreenShortcut.CreateHomeScreenSchortcutListener {
59 // favoriteIcon is public static so it can be accessed from CreateHomeScreenShortcut.
60 public static Bitmap favoriteIcon;
62 // mainWebView is used in onCreate and onOptionsItemSelected.
63 private WebView mainWebView;
64 // formattedUrlString is used in onCreate, onOptionsItemSelected, onCreateHomeScreenShortcutCreate, and loadUrlFromTextBox.
65 private String formattedUrlString;
66 // homepage is used in onCreate and onOptionsItemSelected.
67 private String homepage = "https://www.duckduckgo.com/";
68 // enableJavaScript is used in onCreate, onCreateOptionsMenu, and onOptionsItemSelected.
69 private boolean enableJavaScript;
70 // enableDomStorage is used in onCreate, onCreateOptionsMenu, and onOptionsItemSelected.
71 private boolean enableDomStorage;
73 /* enableSaveFormData does nothing until database storage is implemented.
74 // enableSaveFormData is used in onCreate, onCreateOptionsMenu, and onOptionsItemSelected.
75 private boolean enableSaveFormData;
78 // actionBar is used in onCreate and onOptionsItemSelected.
79 private ActionBar actionBar;
81 // Remove Android Studio's warning about the dangers of using SetJavaScriptEnabled.
82 @SuppressLint("SetJavaScriptEnabled")
85 protected void onCreate(Bundle savedInstanceState) {
86 super.onCreate(savedInstanceState);
87 setContentView(R.layout.activity_webview);
89 final FrameLayout fullScreenVideoFrameLayout = (FrameLayout) findViewById(R.id.fullScreenVideoFrameLayout);
90 final Activity mainWebViewActivity = this;
92 mainWebView = (WebView) findViewById(R.id.mainWebView);
93 actionBar = getSupportActionBar();
95 if (actionBar != null) {
96 // Remove the title from the action bar.
97 actionBar.setDisplayShowTitleEnabled(false);
99 // Add the custom app_bar layout, which shows the favoriteIcon, urlTextBar, and progressBar.
100 actionBar.setCustomView(R.layout.app_bar);
101 actionBar.setDisplayOptions(ActionBar.DISPLAY_SHOW_CUSTOM);
103 // Set the "go" button on the keyboard to load the URL in urlTextBox.
104 EditText urlTextBox = (EditText) actionBar.getCustomView().findViewById(R.id.urlTextBox);
105 urlTextBox.setOnKeyListener(new View.OnKeyListener() {
106 public boolean onKey(View v, int keyCode, KeyEvent event) {
107 // If the event is a key-down event on the "enter" button, load the URL.
108 if ((event.getAction() == KeyEvent.ACTION_DOWN) && (keyCode == KeyEvent.KEYCODE_ENTER)) {
109 // Load the URL into the mainWebView and consume the event.
111 loadUrlFromTextBox();
112 } catch (UnsupportedEncodingException e) {
115 // If the enter key was pressed, consume the event.
118 // If any other key was pressed, do not consume the event.
125 mainWebView.setWebViewClient(new WebViewClient() {
126 // shouldOverrideUrlLoading makes this WebView the default handler for URLs inside the app, so that links are not kicked out to other apps.
128 public boolean shouldOverrideUrlLoading(WebView view, String url) {
129 mainWebView.loadUrl(url);
133 /* These errors do not provide any useful information and clutter the screen.
134 public void onReceivedError(WebView view, WebResourceRequest request, WebResourceError error) {
135 Toast.makeText(mainWebViewActivity, "Error loading " + request + " Error: " + error, Toast.LENGTH_SHORT).show();
139 // Update the URL in urlTextBox when the page starts to load.
141 public void onPageStarted(WebView view, String url, Bitmap favicon) {
142 if (actionBar != null) {
143 EditText urlTextBox = (EditText) actionBar.getCustomView().findViewById(R.id.urlTextBox);
144 urlTextBox.setText(url);
148 // Update formattedUrlString and urlTextBox. It is necessary to do this after the page finishes loading because the final URL can change during load.
150 public void onPageFinished(WebView view, String url) {
151 formattedUrlString = url;
153 if (actionBar != null) {
154 EditText urlTextBox = (EditText) actionBar.getCustomView().findViewById(R.id.urlTextBox);
155 urlTextBox.setText(formattedUrlString);
160 mainWebView.setWebChromeClient(new WebChromeClient() {
161 // Update the progress bar when a page is loading.
163 public void onProgressChanged(WebView view, int progress) {
164 // Make sure that actionBar is not null.
165 if (actionBar != null) {
166 ProgressBar progressBar = (ProgressBar) actionBar.getCustomView().findViewById(R.id.progressBar);
167 progressBar.setProgress(progress);
168 if (progress < 100) {
169 progressBar.setVisibility(View.VISIBLE);
171 progressBar.setVisibility(View.GONE);
176 // Set the favorite icon when it changes.
178 public void onReceivedIcon(WebView view, Bitmap icon) {
179 // Save a copy of the favorite icon for use if a shortcut is added to the home screen.
182 // Place the favorite icon in the actionBar if it is not null.
183 if (actionBar != null) {
184 ImageView imageViewFavoriteIcon = (ImageView) actionBar.getCustomView().findViewById(R.id.favoriteIcon);
185 imageViewFavoriteIcon.setImageBitmap(Bitmap.createScaledBitmap(icon, 64, 64, true));
189 // Enter full screen video
191 public void onShowCustomView(View view, CustomViewCallback callback) {
192 if (getSupportActionBar() != null) {
193 getSupportActionBar().hide();
196 fullScreenVideoFrameLayout.addView(view);
197 fullScreenVideoFrameLayout.setVisibility(View.VISIBLE);
199 mainWebView.setVisibility(View.GONE);
201 /* SYSTEM_UI_FLAG_HIDE_NAVIGATION hides the navigation bars on the bottom or right of the screen.
202 ** SYSTEM_UI_FLAG_FULLSCREEN hides the status bar across the top of the screen.
203 ** SYSTEM_UI_FLAG_IMMERSIVE_STICKY makes the navigation and status bars ghosted overlays and automatically rehides them.
206 // Set the one flag supported by API >= 14.
207 if (Build.VERSION.SDK_INT >= 14) {
208 view.setSystemUiVisibility(View.SYSTEM_UI_FLAG_HIDE_NAVIGATION);
211 // Set the two flags that are supported by API >= 16.
212 if (Build.VERSION.SDK_INT >= 16) {
213 view.setSystemUiVisibility(View.SYSTEM_UI_FLAG_HIDE_NAVIGATION | View.SYSTEM_UI_FLAG_FULLSCREEN);
216 // Set all three flags that are supported by API >= 19.
217 if (Build.VERSION.SDK_INT >= 19) {
218 view.setSystemUiVisibility(View.SYSTEM_UI_FLAG_HIDE_NAVIGATION | View.SYSTEM_UI_FLAG_FULLSCREEN | View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY);
222 // Exit full screen video
223 public void onHideCustomView() {
224 if (getSupportActionBar() != null) {
225 getSupportActionBar().show();
228 mainWebView.setVisibility(View.VISIBLE);
230 fullScreenVideoFrameLayout.removeAllViews();
231 fullScreenVideoFrameLayout.setVisibility(View.GONE);
235 // Allow the downloading of files.
236 mainWebView.setDownloadListener(new DownloadListener() {
237 // Launch the Android download manager when a link leads to a download.
239 public void onDownloadStart(String url, String userAgent, String contentDisposition, String mimetype, long contentLength) {
240 DownloadManager downloadManager = (DownloadManager) getSystemService(DOWNLOAD_SERVICE);
241 DownloadManager.Request requestUri = new DownloadManager.Request(Uri.parse(url));
243 // Add the URL as the description for the download.
244 requestUri.setDescription(url);
246 // Show the download notification after the download is completed if the API is 11 or greater.
247 if (Build.VERSION.SDK_INT >= 11) {
248 requestUri.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED);
251 downloadManager.enqueue(requestUri);
252 Toast.makeText(mainWebViewActivity, "Download started", Toast.LENGTH_SHORT).show();
256 // Allow pinch to zoom.
257 mainWebView.getSettings().setBuiltInZoomControls(true);
259 // Hide zoom controls if the API is 11 or greater.
260 if (Build.VERSION.SDK_INT >= 11) {
261 mainWebView.getSettings().setDisplayZoomControls(false);
264 // Set JavaScript initial status.
265 enableJavaScript = true;
266 mainWebView.getSettings().setJavaScriptEnabled(enableJavaScript);
268 // Set DOM Storage initial status.
269 enableDomStorage = true;
270 mainWebView.getSettings().setDomStorageEnabled(enableDomStorage);
272 /* Save Form Data does nothing until database storage is implemented.
273 // Set Save Form Data initial status.
274 enableSaveFormData = true;
275 mainWebView.getSettings().setSaveFormData(enableSaveFormData);
278 // Get the intent information that started the app.
279 final Intent intent = getIntent();
281 if (intent.getData() != null) {
282 // Get the intent data and convert it to a string.
283 final Uri intentUriData = intent.getData();
284 formattedUrlString = intentUriData.toString();
287 // If formattedUrlString is null assign the homepage to it.
288 if (formattedUrlString == null) {
289 formattedUrlString = homepage;
292 // Load the initial website.
293 mainWebView.loadUrl(formattedUrlString);
297 public boolean onCreateOptionsMenu(Menu menu) {
298 // Inflate the menu; this adds items to the action bar if it is present.
299 getMenuInflater().inflate(R.menu.menu_webview, menu);
300 MenuItem toggleJavaScriptMenuItem = menu.findItem(R.id.toggleJavaScript);
301 MenuItem toggleDomStorageMenuItem = menu.findItem(R.id.toggleDomStorage);
302 /* toggleSaveFormData does nothing until database storage is implemented.
303 MenuItem toggleSaveFormDataMenuItem = menu.findItem(R.id.toggleSaveFormData);
306 // Set the initial status of the menu item checkboxes.
307 toggleJavaScriptMenuItem.setChecked(enableJavaScript);
308 toggleDomStorageMenuItem.setChecked(enableDomStorage);
309 /* toggleSaveFormData does nothing until database storage is implemented.
310 toggleSaveFormDataMenuItem.setChecked(enableSaveFormData);
317 // @TargetApi(11) turns off the errors regarding copy and paste, which are removed from view in menu_webview.xml for lower version of Android.
319 // Remove Android Studio's warning about the dangers of using SetJavaScriptEnabled.
320 @SuppressLint("SetJavaScriptEnabled")
321 public boolean onOptionsItemSelected(MenuItem menuItem) {
322 int menuItemId = menuItem.getItemId();
323 ClipboardManager clipboard = (ClipboardManager) getSystemService(Context.CLIPBOARD_SERVICE);
325 // Sets the commands that relate to the menu entries.
326 switch (menuItemId) {
327 case R.id.toggleJavaScript:
328 if (enableJavaScript) {
329 enableJavaScript = false;
330 menuItem.setChecked(false);
331 mainWebView.getSettings().setJavaScriptEnabled(false);
332 mainWebView.reload();
334 enableJavaScript = true;
335 menuItem.setChecked(true);
336 mainWebView.getSettings().setJavaScriptEnabled(true);
337 mainWebView.reload();
341 case R.id.toggleDomStorage:
342 if (enableDomStorage) {
343 enableDomStorage = false;
344 menuItem.setChecked(false);
345 mainWebView.getSettings().setDomStorageEnabled(false);
346 mainWebView.reload();
348 enableDomStorage = true;
349 menuItem.setChecked(true);
350 mainWebView.getSettings().setDomStorageEnabled(true);
351 mainWebView.reload();
355 /* toggleSaveFormData does nothing until database storage is implemented.
356 case R.id.toggleSaveFormData:
357 if (enableSaveFormData) {
358 enableSaveFormData = false;
359 menuItem.setChecked(false);
360 mainWebView.getSettings().setSaveFormData(false);
361 mainWebView.reload();
363 enableSaveFormData = true;
364 menuItem.setChecked(true);
365 mainWebView.getSettings().setSaveFormData(true);
366 mainWebView.reload();
372 mainWebView.loadUrl(homepage);
376 mainWebView.reload();
380 mainWebView.goBack();
384 mainWebView.goForward();
388 // Make sure that actionBar is not null.
389 if (actionBar != null) {
390 EditText urlTextBox = (EditText) actionBar.getCustomView().findViewById(R.id.urlTextBox);
391 clipboard.setPrimaryClip(ClipData.newPlainText("URL", urlTextBox.getText()));
396 // Make sure that actionBar is not null.
397 if (actionBar != null) {
398 ClipData.Item clipboardData = clipboard.getPrimaryClip().getItemAt(0);
399 EditText urlTextBox = (EditText) actionBar.getCustomView().findViewById(R.id.urlTextBox);
400 urlTextBox.setText(clipboardData.coerceToText(this));
402 loadUrlFromTextBox();
403 } catch (UnsupportedEncodingException e) {
410 // Make sure that actionBar is not null.
411 if (actionBar != null) {
412 EditText urlTextBox = (EditText) actionBar.getCustomView().findViewById(R.id.urlTextBox);
413 Intent shareIntent = new Intent();
414 shareIntent.setAction(Intent.ACTION_SEND);
415 shareIntent.putExtra(Intent.EXTRA_TEXT, urlTextBox.getText().toString());
416 shareIntent.setType("text/plain");
417 startActivity(Intent.createChooser(shareIntent, "Share URL"));
421 case R.id.addToHomescreen:
422 // Show the CreateHomeScreenShortcut AlertDialog and name this instance createShortcut.
423 AppCompatDialogFragment shortcutDialog = new CreateHomeScreenShortcut();
424 shortcutDialog.show(getSupportFragmentManager(), "createShortcut");
426 //Everything else will be handled by CreateHomeScreenShortcut and the associated listeners below.
430 // Launch the system Download Manager.
431 Intent downloadManangerIntent = new Intent(DownloadManager.ACTION_VIEW_DOWNLOADS);
433 // Launch as a new task so that Download Manager and Privacy Browser show as separate windows in the recent tasks list.
434 downloadManangerIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
436 startActivity(downloadManangerIntent);
440 // Show the AboutDialog AlertDialog and name this instance aboutDialog.
441 AppCompatDialogFragment aboutDialog = new AboutDialog();
442 aboutDialog.show(getSupportFragmentManager(), "aboutDialog");
446 return super.onOptionsItemSelected(menuItem);
451 public void onCreateHomeScreenShortcutCancel(DialogFragment dialog) {
452 // Do nothing because the user selected "Cancel".
456 public void onCreateHomeScreenShortcutCreate(DialogFragment dialog) {
457 // Get shortcutNameEditText from the alert dialog.
458 EditText shortcutNameEditText = (EditText) dialog.getDialog().findViewById(R.id.shortcutNameEditText);
460 // Create the bookmark shortcut based on formattedUrlString.
461 Intent bookmarkShortcut = new Intent();
462 bookmarkShortcut.setAction(Intent.ACTION_VIEW);
463 bookmarkShortcut.setData(Uri.parse(formattedUrlString));
465 // Place the bookmark shortcut on the home screen.
466 Intent placeBookmarkShortcut = new Intent();
467 placeBookmarkShortcut.putExtra("android.intent.extra.shortcut.INTENT", bookmarkShortcut);
468 placeBookmarkShortcut.putExtra("android.intent.extra.shortcut.NAME", shortcutNameEditText.getText().toString());
469 placeBookmarkShortcut.putExtra("android.intent.extra.shortcut.ICON", favoriteIcon);
470 placeBookmarkShortcut.setAction("com.android.launcher.action.INSTALL_SHORTCUT");
471 sendBroadcast(placeBookmarkShortcut);
474 // Override onBackPressed so that if mainWebView can go back it does when the system back button is pressed.
476 public void onBackPressed() {
477 final WebView mainWebView = (WebView) findViewById(R.id.mainWebView);
479 if (mainWebView.canGoBack()) {
480 mainWebView.goBack();
482 super.onBackPressed();
486 public void loadUrlFromTextBox() throws UnsupportedEncodingException {
487 // Make sure that actionBar is not null.
488 ActionBar actionBar = getSupportActionBar();
489 if (actionBar != null) {
490 final WebView mainWebView = (WebView) findViewById(R.id.mainWebView);
491 EditText urlTextBox = (EditText) actionBar.getCustomView().findViewById(R.id.urlTextBox);
493 // Get the text from urlTextInput and convert it to a string.
494 String unformattedUrlString = urlTextBox.getText().toString();
495 URL unformattedUrl = null;
496 Uri.Builder formattedUri = new Uri.Builder();
498 // Check to see if unformattedUrlString is a valid URL. Otherwise, convert it into a Duck Duck Go search.
499 if (Patterns.WEB_URL.matcher(unformattedUrlString).matches()) {
501 // Add http:// at the beginning if it is missing. Otherwise the app will segfault.
502 if (!unformattedUrlString.startsWith("http")) {
503 unformattedUrlString = "http://" + unformattedUrlString;
506 // Convert unformattedUrlString to a URL, then to a URI, and then back to a string, which sanitizes the input and adds in any missing components.
508 unformattedUrl = new URL(unformattedUrlString);
509 } catch (MalformedURLException e) {
513 // The ternary operator (? :) makes sure that a null pointer exception is not thrown, which would happen if .get was called on a null value.
514 final String scheme = unformattedUrl != null ? unformattedUrl.getProtocol() : null;
515 final String authority = unformattedUrl != null ? unformattedUrl.getAuthority() : null;
516 final String path = unformattedUrl != null ? unformattedUrl.getPath() : null;
517 final String query = unformattedUrl != null ? unformattedUrl.getQuery() : null;
518 final String fragment = unformattedUrl != null ? unformattedUrl.getRef() : null;
520 formattedUri.scheme(scheme).authority(authority).path(path).query(query).fragment(fragment);
521 formattedUrlString = formattedUri.build().toString();
524 // Sanitize the search input and convert it to a DuckDuckGo search.
525 final String encodedUrlString = URLEncoder.encode(unformattedUrlString, "UTF-8");
526 formattedUrlString = "https://duckduckgo.com/?q=" + encodedUrlString;
529 mainWebView.loadUrl(formattedUrlString);
531 // Hides the keyboard so we can see the webpage.
532 InputMethodManager inputMethodManager = (InputMethodManager) getSystemService(Activity.INPUT_METHOD_SERVICE);
533 inputMethodManager.hideSoftInputFromWindow(mainWebView.getWindowToken(), 0);