Add a forward and back history list. Resolves https://redmine.stoutner.com/issues/24.

[PrivacyBrowserAndroid.git] / app / src / main / java / com / stoutner / privacybrowser / MainWebViewActivity.java

diff --git a/app/src/main/java/com/stoutner/privacybrowser/MainWebViewActivity.java b/app/src/main/java/com/stoutner/privacybrowser/MainWebViewActivity.java
index 1c20c46d8f92534cf1e09f949aa235ad36c8206c..779d2d69b91a0e1c6d299c4dab2315439a063a75 100644 (file)
--- a/app/src/main/java/com/stoutner/privacybrowser/MainWebViewActivity.java
+++ b/app/src/main/java/com/stoutner/privacybrowser/MainWebViewActivity.java
@@ -62,6 +62,7 @@ import android.view.inputmethod.InputMethodManager;
 import android.webkit.CookieManager;
 import android.webkit.DownloadListener;
 import android.webkit.SslErrorHandler;
+import android.webkit.WebBackForwardList;
 import android.webkit.WebChromeClient;
 import android.webkit.WebStorage;
 import android.webkit.WebView;
@@ -84,7 +85,7 @@ import java.util.Map;
 
 // We need to use AppCompatActivity from android.support.v7.app.AppCompatActivity to have access to the SupportActionBar until the minimum API is >= 21.
 public class MainWebViewActivity extends AppCompatActivity implements NavigationView.OnNavigationItemSelectedListener, CreateHomeScreenShortcut.CreateHomeScreenSchortcutListener,
-        SslCertificateError.SslCertificateErrorListener, DownloadFile.DownloadFileListener, DownloadImage.DownloadImageListener {
+        SslCertificateError.SslCertificateErrorListener, DownloadFile.DownloadFileListener, DownloadImage.DownloadImageListener, UrlHistory.UrlHistoryListener {
 
     // `appBar` is public static so it can be accessed from `OrbotProxyHelper`.
     // It is also used in `onCreate()`, `onOptionsItemSelected()`, and `closeFindOnPage()`.
@@ -283,13 +284,45 @@ public class MainWebViewActivity extends AppCompatActivity implements Navigation
 
         // Create the navigation drawer.
         drawerLayout = (DrawerLayout) findViewById(R.id.drawerLayout);
-        // The DrawerTitle identifies the drawer in accessibility mode.
+        // `DrawerTitle` identifies the drawer in accessibility mode.
         drawerLayout.setDrawerTitle(GravityCompat.START, getString(R.string.navigation_drawer));
 
         // Listen for touches on the navigation menu.
         final NavigationView navigationView = (NavigationView) findViewById(R.id.navigationView);
         navigationView.setNavigationItemSelectedListener(this);
 
+        // Get handles for `navigationMenu` and the back and forward menu items.  The menu is zero-based, so item 1 and 2 and the second and third items in the menu.
+        final Menu navigationMenu = navigationView.getMenu();
+        final MenuItem navigationBackMenuItem = navigationMenu.getItem(1);
+        final MenuItem navigationForwardMenuItem = navigationMenu.getItem(2);
+        final MenuItem navigationHistoryMenuItem = navigationMenu.getItem(3);
+
+        // The `DrawerListener` allows us to update the Navigation Menu.
+        drawerLayout.addDrawerListener(new DrawerLayout.DrawerListener() {
+            @Override
+            public void onDrawerSlide(View drawerView, float slideOffset) {
+            }
+
+            @Override
+            public void onDrawerOpened(View drawerView) {
+            }
+
+            @Override
+            public void onDrawerClosed(View drawerView) {
+            }
+
+            @Override
+            public void onDrawerStateChanged(int newState) {
+                // Update the `Back`, `Forward`, and `History` menu items every time the drawer opens.
+                navigationBackMenuItem.setEnabled(mainWebView.canGoBack());
+                navigationForwardMenuItem.setEnabled(mainWebView.canGoForward());
+                navigationHistoryMenuItem.setEnabled((mainWebView.canGoBack() || mainWebView.canGoForward()));
+
+                // Hide the keyboard so we can see the navigation menu.  `0` indicates no additional flags.
+                inputMethodManager.hideSoftInputFromWindow(mainWebView.getWindowToken(), 0);
+            }
+        });
+
         // drawerToggle creates the hamburger icon at the start of the AppBar.
         drawerToggle = new ActionBarDrawerToggle(this, drawerLayout, supportAppBar, R.string.open_navigation, R.string.close_navigation);
 
@@ -848,7 +881,7 @@ public class MainWebViewActivity extends AppCompatActivity implements Navigation
                 return true;
 
             case R.id.addToHomescreen:
-                // Show the `CreateHomeScreenShortcut` `AlertDialog` and name this instance `@string/create_shortcut`.
+                // Show the `CreateHomeScreenShortcut` `AlertDialog` and name this instance `R.string.create_shortcut`.
                 AppCompatDialogFragment createHomeScreenShortcutDialogFragment = new CreateHomeScreenShortcut();
                 createHomeScreenShortcutDialogFragment.show(getSupportFragmentManager(), getResources().getString(R.string.create_shortcut));
 
@@ -899,6 +932,15 @@ public class MainWebViewActivity extends AppCompatActivity implements Navigation
                 }
                 break;
 
+            case R.id.history:
+                // Gte the `WebBackForwardList`.
+                WebBackForwardList webBackForwardList = mainWebView.copyBackForwardList();
+
+                // Show the `UrlHistory` `AlertDialog` and name this instance `R.string.history`.  `this` is the `Context`.
+                AppCompatDialogFragment urlHistoryDialogFragment = UrlHistory.loadBackForwardList(this, webBackForwardList);
+                urlHistoryDialogFragment.show(getSupportFragmentManager(), getResources().getString(R.string.history));
+                break;
+
             case R.id.bookmarks:
                 // Launch BookmarksActivity.
                 Intent bookmarksIntent = new Intent(this, BookmarksActivity.class);
@@ -1240,6 +1282,12 @@ public class MainWebViewActivity extends AppCompatActivity implements Navigation
         sslErrorHandler.proceed();
     }
 
+    @Override
+    public void onUrlHistoryEntrySelected(int moveBackOrForwardSteps) {
+        // Load the history entry.
+        mainWebView.goBackOrForward(moveBackOrForwardSteps);
+    }
+
     // Override onBackPressed to handle the navigation drawer and mainWebView.
     @Override
     public void onBackPressed() {
@@ -1331,7 +1379,7 @@ public class MainWebViewActivity extends AppCompatActivity implements Navigation
 
         mainWebView.loadUrl(formattedUrlString, customHeaders);
 
-        // Hides the keyboard so we can see the webpage.  `0` indicates no additional flags.
+        // Hide the keyboard so we can see the webpage.  `0` indicates no additional flags.
         inputMethodManager.hideSoftInputFromWindow(mainWebView.getWindowToken(), 0);
     }
 
@@ -1360,7 +1408,7 @@ public class MainWebViewActivity extends AppCompatActivity implements Navigation
         Toolbar appBarToolbar = (Toolbar) findViewById(R.id.appBar);
         appBarToolbar.setVisibility(View.VISIBLE);
 
-        // Hides the keyboard so we can see the webpage.  `0` indicates no additional flags.
+        // Hide the keyboard so we can see the webpage.  `0` indicates no additional flags.
         inputMethodManager.hideSoftInputFromWindow(mainWebView.getWindowToken(), 0);
     }