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 and onOptionsItemSelected.
69 private boolean enableJavaScript;
70 // enableDomStorage is used in onCreate and onOptionsItemSelected.
71 private boolean enableDomStorage;
72 // actionBar is used in onCreate and onOptionsItemSelected.
73 private ActionBar actionBar;
75 // Remove Android Studio's warning about the dangers of using SetJavaScriptEnabled.
76 @SuppressLint("SetJavaScriptEnabled")
79 protected void onCreate(Bundle savedInstanceState) {
80 super.onCreate(savedInstanceState);
81 setContentView(R.layout.activity_webview);
83 final FrameLayout fullScreenVideoFrameLayout = (FrameLayout) findViewById(R.id.fullScreenVideoFrameLayout);
84 final Activity mainWebViewActivity = this;
86 mainWebView = (WebView) findViewById(R.id.mainWebView);
87 actionBar = getSupportActionBar();
89 if (actionBar != null) {
90 // Remove the title from the action bar.
91 actionBar.setDisplayShowTitleEnabled(false);
93 // Add the custom app_bar layout, which shows the favoriteIcon, urlTextBar, and progressBar.
94 actionBar.setCustomView(R.layout.app_bar);
95 actionBar.setDisplayOptions(ActionBar.DISPLAY_SHOW_CUSTOM);
97 // Set the "go" button on the keyboard to load the URL in urlTextBox.
98 EditText urlTextBox = (EditText) actionBar.getCustomView().findViewById(R.id.urlTextBox);
99 urlTextBox.setOnKeyListener(new View.OnKeyListener() {
100 public boolean onKey(View v, int keyCode, KeyEvent event) {
101 // If the event is a key-down event on the "enter" button, load the URL.
102 if ((event.getAction() == KeyEvent.ACTION_DOWN) && (keyCode == KeyEvent.KEYCODE_ENTER)) {
103 // Load the URL into the mainWebView and consume the event.
105 loadUrlFromTextBox();
106 } catch (UnsupportedEncodingException e) {
109 // If the enter key was pressed, consume the event.
112 // If any other key was pressed, do not consume the event.
119 mainWebView.setWebViewClient(new WebViewClient() {
120 // shouldOverrideUrlLoading makes this WebView the default handler for URLs inside the app, so that links are not kicked out to other apps.
122 public boolean shouldOverrideUrlLoading(WebView view, String url) {
123 mainWebView.loadUrl(url);
127 /* These errors do not provide any useful information and clutter the screen.
128 public void onReceivedError(WebView view, WebResourceRequest request, WebResourceError error) {
129 Toast.makeText(mainWebViewActivity, "Error loading " + request + " Error: " + error, Toast.LENGTH_SHORT).show();
133 // Update the URL in urlTextBox when the page starts to load.
135 public void onPageStarted(WebView view, String url, Bitmap favicon) {
136 if (actionBar != null) {
137 EditText urlTextBox = (EditText) actionBar.getCustomView().findViewById(R.id.urlTextBox);
138 urlTextBox.setText(url);
142 // Update formattedUrlString and urlTextBox. It is necessary to do this after the page finishes loading because the final URL can change during load.
144 public void onPageFinished(WebView view, String url) {
145 formattedUrlString = url;
147 if (actionBar != null) {
148 EditText urlTextBox = (EditText) actionBar.getCustomView().findViewById(R.id.urlTextBox);
149 urlTextBox.setText(formattedUrlString);
154 mainWebView.setWebChromeClient(new WebChromeClient() {
155 // Update the progress bar when a page is loading.
157 public void onProgressChanged(WebView view, int progress) {
158 // Make sure that actionBar is not null.
159 if (actionBar != null) {
160 ProgressBar progressBar = (ProgressBar) actionBar.getCustomView().findViewById(R.id.progressBar);
161 progressBar.setProgress(progress);
162 if (progress < 100) {
163 progressBar.setVisibility(View.VISIBLE);
165 progressBar.setVisibility(View.GONE);
170 // Set the favorite icon when it changes.
172 public void onReceivedIcon(WebView view, Bitmap icon) {
173 // Save a copy of the favorite icon for use if a shortcut is added to the home screen.
176 // Place the favorite icon in the actionBar if it is not null.
177 if (actionBar != null) {
178 ImageView imageViewFavoriteIcon = (ImageView) actionBar.getCustomView().findViewById(R.id.favoriteIcon);
179 imageViewFavoriteIcon.setImageBitmap(Bitmap.createScaledBitmap(icon, 64, 64, true));
183 // Enter full screen video
185 public void onShowCustomView(View view, CustomViewCallback callback) {
186 if (getSupportActionBar() != null) {
187 getSupportActionBar().hide();
190 fullScreenVideoFrameLayout.addView(view);
191 fullScreenVideoFrameLayout.setVisibility(View.VISIBLE);
193 mainWebView.setVisibility(View.GONE);
195 /* SYSTEM_UI_FLAG_HIDE_NAVIGATION hides the navigation bars on the bottom or right of the screen.
196 ** SYSTEM_UI_FLAG_FULLSCREEN hides the status bar across the top of the screen.
197 ** SYSTEM_UI_FLAG_IMMERSIVE_STICKY makes the navigation and status bars ghosted overlays and automatically rehides them.
200 // Set the one flag supported by API >= 14.
201 if (Build.VERSION.SDK_INT >= 14) {
202 view.setSystemUiVisibility(View.SYSTEM_UI_FLAG_HIDE_NAVIGATION);
205 // Set the two flags that are supported by API >= 16.
206 if (Build.VERSION.SDK_INT >= 16) {
207 view.setSystemUiVisibility(View.SYSTEM_UI_FLAG_HIDE_NAVIGATION | View.SYSTEM_UI_FLAG_FULLSCREEN);
210 // Set all three flags that are supported by API >= 19.
211 if (Build.VERSION.SDK_INT >= 19) {
212 view.setSystemUiVisibility(View.SYSTEM_UI_FLAG_HIDE_NAVIGATION | View.SYSTEM_UI_FLAG_FULLSCREEN | View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY);
216 // Exit full screen video
217 public void onHideCustomView() {
218 if (getSupportActionBar() != null) {
219 getSupportActionBar().show();
222 mainWebView.setVisibility(View.VISIBLE);
224 fullScreenVideoFrameLayout.removeAllViews();
225 fullScreenVideoFrameLayout.setVisibility(View.GONE);
229 // Allow the downloading of files.
230 mainWebView.setDownloadListener(new DownloadListener() {
231 // Launch the Android download manager when a link leads to a download.
233 public void onDownloadStart(String url, String userAgent, String contentDisposition, String mimetype, long contentLength) {
234 DownloadManager downloadManager = (DownloadManager) getSystemService(DOWNLOAD_SERVICE);
235 DownloadManager.Request requestUri = new DownloadManager.Request(Uri.parse(url));
237 // Add the URL as the description for the download.
238 requestUri.setDescription(url);
240 // Show the download notification after the download is completed if the API is 11 or greater.
241 if (Build.VERSION.SDK_INT >= 11) {
242 requestUri.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED);
245 downloadManager.enqueue(requestUri);
246 Toast.makeText(mainWebViewActivity, "Download started", Toast.LENGTH_SHORT).show();
250 // Allow pinch to zoom.
251 mainWebView.getSettings().setBuiltInZoomControls(true);
253 // Hide zoom controls if the API is 11 or greater.
254 if (Build.VERSION.SDK_INT >= 11) {
255 mainWebView.getSettings().setDisplayZoomControls(false);
258 // Set JavaScript initial status.
259 enableJavaScript = true;
260 mainWebView.getSettings().setJavaScriptEnabled(enableJavaScript);
262 // Set DOM Storage initial status.
263 enableDomStorage = true;
264 mainWebView.getSettings().setDomStorageEnabled(enableDomStorage);
266 // Get the intent information that started the app.
267 final Intent intent = getIntent();
269 if (intent.getData() != null) {
270 // Get the intent data and convert it to a string.
271 final Uri intentUriData = intent.getData();
272 formattedUrlString = intentUriData.toString();
275 // If formattedUrlString is null assign the homepage to it.
276 if (formattedUrlString == null) {
277 formattedUrlString = homepage;
280 // Load the initial website.
281 mainWebView.loadUrl(formattedUrlString);
285 public boolean onCreateOptionsMenu(Menu menu) {
286 // Inflate the menu; this adds items to the action bar if it is present.
287 getMenuInflater().inflate(R.menu.menu_webview, menu);
288 MenuItem toggleJavaScriptMenuItem = menu.findItem(R.id.toggleJavaScript);
289 MenuItem toggleDomStorageMenuItem = menu.findItem(R.id.toggleDomStorage);
291 // Set the JavaScript menu item checkbox initial status.
292 toggleJavaScriptMenuItem.setChecked(enableJavaScript);
294 // Set the DOM Storage menu item checkbox initial status.
295 toggleDomStorageMenuItem.setChecked(enableDomStorage);
301 // @TargetApi(11) turns off the errors regarding copy and paste, which are removed from view in menu_webview.xml for lower version of Android.
303 // Remove Android Studio's warning about the dangers of using SetJavaScriptEnabled.
304 @SuppressLint("SetJavaScriptEnabled")
305 public boolean onOptionsItemSelected(MenuItem menuItem) {
306 int menuItemId = menuItem.getItemId();
307 ClipboardManager clipboard = (ClipboardManager) getSystemService(Context.CLIPBOARD_SERVICE);
309 // Sets the commands that relate to the menu entries.
310 switch (menuItemId) {
311 case R.id.toggleJavaScript:
312 if (enableJavaScript) {
313 enableJavaScript = false;
314 menuItem.setChecked(false);
315 mainWebView.getSettings().setJavaScriptEnabled(false);
316 mainWebView.loadUrl(formattedUrlString);
318 enableJavaScript = true;
319 menuItem.setChecked(true);
320 mainWebView.getSettings().setJavaScriptEnabled(true);
321 mainWebView.loadUrl(formattedUrlString);
325 case R.id.toggleDomStorage:
326 if (enableDomStorage) {
327 enableDomStorage = false;
328 menuItem.setChecked(false);
329 mainWebView.getSettings().setDomStorageEnabled(false);
330 mainWebView.loadUrl(formattedUrlString);
332 enableDomStorage = true;
333 menuItem.setChecked(true);
334 mainWebView.getSettings().setDomStorageEnabled(true);
335 mainWebView.loadUrl(formattedUrlString);
340 mainWebView.loadUrl(homepage);
344 mainWebView.loadUrl(formattedUrlString);
348 mainWebView.goBack();
352 mainWebView.goForward();
356 // Make sure that actionBar is not null.
357 if (actionBar != null) {
358 EditText urlTextBox = (EditText) actionBar.getCustomView().findViewById(R.id.urlTextBox);
359 clipboard.setPrimaryClip(ClipData.newPlainText("URL", urlTextBox.getText()));
364 // Make sure that actionBar is not null.
365 if (actionBar != null) {
366 ClipData.Item clipboardData = clipboard.getPrimaryClip().getItemAt(0);
367 EditText urlTextBox = (EditText) actionBar.getCustomView().findViewById(R.id.urlTextBox);
368 urlTextBox.setText(clipboardData.coerceToText(this));
370 loadUrlFromTextBox();
371 } catch (UnsupportedEncodingException e) {
378 // Make sure that actionBar is not null.
379 if (actionBar != null) {
380 EditText urlTextBox = (EditText) actionBar.getCustomView().findViewById(R.id.urlTextBox);
381 Intent shareIntent = new Intent();
382 shareIntent.setAction(Intent.ACTION_SEND);
383 shareIntent.putExtra(Intent.EXTRA_TEXT, urlTextBox.getText().toString());
384 shareIntent.setType("text/plain");
385 startActivity(Intent.createChooser(shareIntent, "Share URL"));
389 case R.id.addToHomescreen:
390 // Show the CreateHomeScreenShortcut AlertDialog and name this instance createShortcut.
391 AppCompatDialogFragment shortcutDialog = new CreateHomeScreenShortcut();
392 shortcutDialog.show(getSupportFragmentManager(), "createShortcut");
394 //Everything else will be handled by CreateHomeScreenShortcut and the associated listeners below.
398 // Launch the system Download Manager.
399 Intent downloadManangerIntent = new Intent(DownloadManager.ACTION_VIEW_DOWNLOADS);
401 // Launch as a new task so that Download Manager and Privacy Browser show as separate windows in the recent tasks list.
402 downloadManangerIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
404 startActivity(downloadManangerIntent);
408 // Show the AboutDialog AlertDialog and name this instance aboutDialog.
409 AppCompatDialogFragment aboutDialog = new AboutDialog();
410 aboutDialog.show(getSupportFragmentManager(), "aboutDialog");
414 return super.onOptionsItemSelected(menuItem);
419 public void onCreateHomeScreenShortcutCancel(DialogFragment dialog) {
420 // Do nothing because the user selected "Cancel".
424 public void onCreateHomeScreenShortcutCreate(DialogFragment dialog) {
425 // Get shortcutNameEditText from the alert dialog.
426 EditText shortcutNameEditText = (EditText) dialog.getDialog().findViewById(R.id.shortcutNameEditText);
428 // Create the bookmark shortcut based on formattedUrlString.
429 Intent bookmarkShortcut = new Intent();
430 bookmarkShortcut.setAction(Intent.ACTION_VIEW);
431 bookmarkShortcut.setData(Uri.parse(formattedUrlString));
433 // Place the bookmark shortcut on the home screen.
434 Intent placeBookmarkShortcut = new Intent();
435 placeBookmarkShortcut.putExtra("android.intent.extra.shortcut.INTENT", bookmarkShortcut);
436 placeBookmarkShortcut.putExtra("android.intent.extra.shortcut.NAME", shortcutNameEditText.getText().toString());
437 placeBookmarkShortcut.putExtra("android.intent.extra.shortcut.ICON", favoriteIcon);
438 placeBookmarkShortcut.setAction("com.android.launcher.action.INSTALL_SHORTCUT");
439 sendBroadcast(placeBookmarkShortcut);
442 // Override onBackPressed so that if mainWebView can go back it does when the system back button is pressed.
444 public void onBackPressed() {
445 final WebView mainWebView = (WebView) findViewById(R.id.mainWebView);
447 if (mainWebView.canGoBack()) {
448 mainWebView.goBack();
450 super.onBackPressed();
454 public void loadUrlFromTextBox() throws UnsupportedEncodingException {
455 // Make sure that actionBar is not null.
456 ActionBar actionBar = getSupportActionBar();
457 if (actionBar != null) {
458 final WebView mainWebView = (WebView) findViewById(R.id.mainWebView);
459 EditText urlTextBox = (EditText) actionBar.getCustomView().findViewById(R.id.urlTextBox);
461 // Get the text from urlTextInput and convert it to a string.
462 String unformattedUrlString = urlTextBox.getText().toString();
463 URL unformattedUrl = null;
464 Uri.Builder formattedUri = new Uri.Builder();
466 // Check to see if unformattedUrlString is a valid URL. Otherwise, convert it into a Duck Duck Go search.
467 if (Patterns.WEB_URL.matcher(unformattedUrlString).matches()) {
469 // Add http:// at the beginning if it is missing. Otherwise the app will segfault.
470 if (!unformattedUrlString.startsWith("http")) {
471 unformattedUrlString = "http://" + unformattedUrlString;
474 // 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.
476 unformattedUrl = new URL(unformattedUrlString);
477 } catch (MalformedURLException e) {
481 // The ternary operator (? :) makes sure that a null pointer exception is not thrown, which would happen if .get was called on a null value.
482 final String scheme = unformattedUrl != null ? unformattedUrl.getProtocol() : null;
483 final String authority = unformattedUrl != null ? unformattedUrl.getAuthority() : null;
484 final String path = unformattedUrl != null ? unformattedUrl.getPath() : null;
485 final String query = unformattedUrl != null ? unformattedUrl.getQuery() : null;
486 final String fragment = unformattedUrl != null ? unformattedUrl.getRef() : null;
488 formattedUri.scheme(scheme).authority(authority).path(path).query(query).fragment(fragment);
489 formattedUrlString = formattedUri.build().toString();
492 // Sanitize the search input and convert it to a DuckDuckGo search.
493 final String encodedUrlString = URLEncoder.encode(unformattedUrlString, "UTF-8");
494 formattedUrlString = "https://duckduckgo.com/?q=" + encodedUrlString;
497 mainWebView.loadUrl(formattedUrlString);
499 // Hides the keyboard so we can see the webpage.
500 InputMethodManager inputMethodManager = (InputMethodManager) getSystemService(Activity.INPUT_METHOD_SERVICE);
501 inputMethodManager.hideSoftInputFromWindow(mainWebView.getWindowToken(), 0);