Add full screen mode feature for 2D browsing

This commit adds a Fullscreen item in the hamburger menu to set the current window in the fullscreen mode. The commit also enables three edge cases:
- When users sets fullscreen mode, go into a fullscreen video, exit fullscreen video, the fullscreen mode is reserved.
- When users sets fullscreen mode, opens a new tab, that tab is opened in fullscreen mode too.
- When exitFullScreenMode() is called (e.g., in onPause()), fullscreen mode is exited correctly.

Fixes #1494

app/src/common/shared/com/igalia/wolvic/ui/widgets/NavigationBarWidget.java

@@ -367,6 +367,12 @@ private void updateUI() {
             if (mAttachedWindow != null) {
                 mAttachedWindow.setIsFullScreen(false);
             }
+            if (mAttachedWindow.getKeepFullscreenInHamburgerMenu()) {
+                postDelayed(() -> {
+                    mAttachedWindow.setIsFullScreen(true);
+                    mAttachedWindow.setKeepFullscreenInHamburgerMenu(false);
+                }, 2000);
+            }
             if (mAudio != null) {
                 mAudio.playSound(AudioEngine.Sound.CLICK);
             }
@@ -792,6 +798,11 @@ private void exitFullScreenMode() {
             if (getSession().isInFullScreen()) {
                 getSession().exitFullScreen();
             }
+            if (mAttachedWindow.getKeepFullscreenInHamburgerMenu()) {
+                mAttachedWindow.setIsFullScreen(false);
+                mAttachedWindow.setFullscreenInHamburgerMenuEnabled(false);
+                mAttachedWindow.setKeepFullscreenInHamburgerMenu(false);
+            }
         }, 50);
 
         mWidgetManager.updateWidget(mAttachedWindow);
@@ -1358,6 +1369,11 @@ public void onResize() {
                 enterResizeMode();
             }
 
+            @Override
+            public void onFullScreen() {
+                mAttachedWindow.setFullscreenInHamburgerMenu();
+            }
+
             @Override
             public void onPassthrough() {
                 mWidgetManager.togglePassthrough();

app/src/common/shared/com/igalia/wolvic/ui/widgets/WindowWidget.java

@@ -155,6 +155,8 @@ public class WindowWidget extends UIWidget implements SessionChangeListener,
     private SharedPreferences mPrefs;
     private DownloadsManager mDownloadsManager;
     private float mBrowserDensity;
+    private boolean fullscreenInHamburgerMenuEnabled;
+    private boolean keepFullscreenInHamburgerMenu;
 
     public interface WindowListener {
         default void onFocusRequest(@NonNull WindowWidget aWindow) {}
@@ -966,7 +968,16 @@ public boolean isResizing() {
         return mIsResizing;
     }
 
+    public void setFullscreenInHamburgerMenu() {
+        setIsFullScreen(true);
+        setFullscreenInHamburgerMenuEnabled(true);
+    }
+
     public void setIsFullScreen(boolean isFullScreen) {
+        if (isFullScreen && fullscreenInHamburgerMenuEnabled) {
+            keepFullscreenInHamburgerMenu = true;
+        }
+
         if (mViewModel.getIsFullscreen().getValue().get() != isFullScreen) {
             mViewModel.setIsFullscreen(isFullScreen);
             for (WindowListener listener: mListeners) {
@@ -2367,4 +2378,20 @@ private float getBrowserDensity() {
         }
         return mBrowserDensity;
     }
+
+    public boolean getFullscreenInHamburgerMenuEnabled() {
+        return fullscreenInHamburgerMenuEnabled;
+    }
+
+    public void setFullscreenInHamburgerMenuEnabled(boolean fullscreenInHamburgerMenuEnabled) {
+        this.fullscreenInHamburgerMenuEnabled = fullscreenInHamburgerMenuEnabled;
+    }
+
+    public boolean getKeepFullscreenInHamburgerMenu() {
+        return keepFullscreenInHamburgerMenu;
+    }
+
+    public void setKeepFullscreenInHamburgerMenu(boolean keepFullscreenInHamburgerMenu) {
+        this.keepFullscreenInHamburgerMenu = keepFullscreenInHamburgerMenu;
+    }
 }

app/src/common/shared/com/igalia/wolvic/ui/widgets/Windows.java

@@ -1771,6 +1771,12 @@ public void showTabAddedNotification() {
             }
         }
 
+        if (mFocusedWindow.getFullscreenInHamburgerMenuEnabled()) {
+            mFocusedWindow.postDelayed(() -> {
+                mFocusedWindow.setIsFullScreen(true);
+                mFocusedWindow.setKeepFullscreenInHamburgerMenu(false);
+            }, 2000);
+        }
     }
 
     public void showTabSentNotification() {

app/src/common/shared/com/igalia/wolvic/ui/widgets/menus/HamburgerMenuWidget.java

@@ -55,6 +55,7 @@ public interface MenuDelegate {
         void onPageZoomIn();
         void onPageZoomOut();
         int getCurrentZoomLevel();
+        void onFullScreen();
     }
 
     public static final int SWITCH_ITEM_ID = 0;
@@ -189,6 +190,18 @@ private void updateItems() {
 
         // In kiosk mode, only resize, find in page and passthrough are available.
         if (!mWidgetManager.getFocusedWindow().isKioskMode()) {
+            mItems.add(new HamburgerMenuAdapter.MenuItem.Builder(
+                    HamburgerMenuAdapter.MenuItem.TYPE_DEFAULT,
+                    (menuItem) -> {
+                        if (mDelegate != null) {
+                            mDelegate.onFullScreen();
+                        }
+                        return null;
+                    })
+                    .withTitle(getContext().getString(R.string.hamburger_menu_fullscreen))
+                    .withIcon(R.drawable.fullscreen_button)
+                    .build());
+
             final Session activeSession = SessionStore.get().getActiveSession();
 
             if (!BuildConfig.FLAVOR_backend.equals("chromium")) {

app/src/main/res/values/strings.xml

@@ -2089,6 +2089,10 @@ the Select` button. When clicked it bookmarks all the previously selected tabs -
          it saves the Web App provided by the current page -->
     <string name="hamburger_menu_save_web_app">Save Web app…</string>
 
+    <!-- This string is displayed inside the Hamburger menu at the right of the navigation bar. When clicked
+         it put the current window in fullscreen mode -->
+    <string name="hamburger_menu_fullscreen">Fullscreen</string>
+
     <!-- This string is displayed in the tooltip that is displayed when the user hovers the hamburger menu icon -->
     <string name="hamburger_menu_tooltip">Menu</string>