Add more Android configuration options

android/src/main/java/com/pspdfkit/react/ConfigurationAdapter.java

@@ -32,8 +32,6 @@
 import com.pspdfkit.configuration.page.PageScrollMode;
 import com.pspdfkit.configuration.sharing.ShareFeatures;
 
-import java.util.EnumSet;
-
 import java.util.ArrayList;
 import java.util.Collections;
 import java.util.List;
@@ -84,6 +82,8 @@ public class ConfigurationAdapter {
     private static final String AUTOSAVE_DISABLED = "disableAutomaticSaving";
     private static final String ANNOTATION_EDITING_ENABLED = "enableAnnotationEditing";
     private static final String EDITABLE_ANNOTATION_TYPES = "editableAnnotationTypes";
+    private static final String SHOW_SETTINGS_MENU = "showSettingsMenu";
+    private static final String TOOLBAR_TITLE = "toolbarTitle";
 
     private final PdfActivityConfiguration.Builder configuration;
 
@@ -174,6 +174,12 @@ public ConfigurationAdapter(@NonNull Context context, ReadableMap configuration)
             if (configuration.hasKey(EDITABLE_ANNOTATION_TYPES)) {
                 configureEditableAnnotationTypes(configuration.getArray(EDITABLE_ANNOTATION_TYPES));
             }
+            if (configuration.hasKey(SHOW_SETTINGS_MENU)) {
+                configureSettingsMenuShown(configuration.getBoolean(SHOW_SETTINGS_MENU));
+            }
+            if (configuration.hasKey(TOOLBAR_TITLE)) {
+                configureToolbarTitle(configuration.getString(TOOLBAR_TITLE));
+            }
         }
     }
 
@@ -396,6 +402,18 @@ private void configureEditableAnnotationTypes(@Nullable final ReadableArray edit
         configuration.editableAnnotationTypes(parsedTypes);
     }
 
+    private void configureSettingsMenuShown(final boolean settingsMenuShown) {
+        if (settingsMenuShown) {
+            configuration.showSettingsMenu();
+        } else {
+            configuration.hideSettingsMenu();
+        }
+    }
+
+    private void configureToolbarTitle(@Nullable final String customTitle) {
+        configuration.title(customTitle);
+    }
+
     public PdfActivityConfiguration build() {
         return configuration.build();
     }

android/src/main/java/com/pspdfkit/react/ReactPdfViewManager.java

@@ -148,6 +148,11 @@ public void setMenuItemGrouping(PdfView view, @NonNull ReadableArray menuItemGro
         view.setMenuItemGroupingRule(groupingRule);
     }
 
+    @ReactProp(name = "showNavigationButtonInToolbar")
+    public void setShowNavigationButtonInToolbar(@NonNull final PdfView view, final boolean showNavigationButtonInToolbar) {
+        view.setShowNavigationButtonInToolbar(showNavigationButtonInToolbar);
+    }
+
     @Nullable
     @Override
     public Map getExportedCustomDirectEventTypeConstants() {

android/src/main/java/com/pspdfkit/react/events/PdfViewNavigationButtonClickedEvent.java

@@ -0,0 +1,31 @@
+package com.pspdfkit.react.events;
+
+import androidx.annotation.IdRes;
+
+import com.facebook.react.bridge.Arguments;
+import com.facebook.react.bridge.WritableMap;
+import com.facebook.react.uimanager.events.Event;
+import com.facebook.react.uimanager.events.RCTEventEmitter;
+
+/**
+ * Event sent by the {@link com.pspdfkit.views.PdfView} when navigation button was clicked.
+ */
+public class PdfViewNavigationButtonClickedEvent extends Event<PdfViewNavigationButtonClickedEvent> {
+
+    public static final String EVENT_NAME = "pdfViewNavgigationButtonClicked";
+
+    public PdfViewNavigationButtonClickedEvent(@IdRes int viewId) {
+        super(viewId);
+    }
+
+    @Override
+    public String getEventName() {
+        return EVENT_NAME;
+    }
+
+    @Override
+    public void dispatch(RCTEventEmitter rctEventEmitter) {
+        WritableMap eventData = Arguments.createMap();
+        rctEventEmitter.receiveEvent(getViewTag(), getEventName(), eventData);
+    }
+}

android/src/main/java/com/pspdfkit/views/PdfView.java

@@ -34,11 +34,11 @@
 import com.pspdfkit.react.events.PdfViewDocumentLoadFailedEvent;
 import com.pspdfkit.react.events.PdfViewDocumentSaveFailedEvent;
 import com.pspdfkit.react.events.PdfViewDocumentSavedEvent;
+import com.pspdfkit.react.events.PdfViewNavigationButtonClickedEvent;
 import com.pspdfkit.react.events.PdfViewStateChangedEvent;
 import com.pspdfkit.react.helper.DocumentJsonDataProvider;
 import com.pspdfkit.ui.DocumentDescriptor;
 import com.pspdfkit.ui.PdfFragment;
-import com.pspdfkit.ui.PdfUi;
 import com.pspdfkit.ui.PdfUiFragment;
 import com.pspdfkit.ui.PdfUiFragmentBuilder;
 import com.pspdfkit.ui.toolbar.grouping.MenuItemGroupingRule;
@@ -50,6 +50,7 @@
 import java.io.ByteArrayOutputStream;
 import java.io.File;
 import java.util.ArrayList;
+import java.util.Collections;
 import java.util.EnumSet;
 import java.util.List;
 import java.util.Map;
@@ -97,7 +98,10 @@ public class PdfView extends FrameLayout {
 
     @Nullable
     private PdfUiFragment fragment;
-    private BehaviorSubject<PdfUiFragment> pdfUiFragmentGetter = BehaviorSubject.create();
+
+    /** We wrap the fragment in a list so we can have a state that encapsulates no element being set. */
+    @NonNull
+    private final BehaviorSubject<List<PdfUiFragment>> pdfUiFragmentGetter = BehaviorSubject.createDefault(Collections.emptyList());
 
     /** An internal id we generate so we can track if fragments found belong to this specific PdfView instance. */
     private int internalId;
@@ -219,6 +223,14 @@ public void setMenuItemGroupingRule(@NonNull MenuItemGroupingRule groupingRule)
         pdfViewModeController.setMenuItemGroupingRule(groupingRule);
     }
 
+    public void setShowNavigationButtonInToolbar(final boolean showNavigationButtonInToolbar) {
+        pendingFragmentActions.add(getCurrentPdfUiFragment()
+            .observeOn(Schedulers.io())
+            .subscribe(pdfUiFragment -> {
+                ((ReactPdfUiFragment) pdfUiFragment).setShowNavigationButtonInToolbar(showNavigationButtonInToolbar);
+            }));
+    }
+
     private void setupFragment() {
         if (fragmentTag != null && configuration != null && document != null) {
             PdfUiFragment pdfFragment = (PdfUiFragment) fragmentManager.findFragmentByTag(fragmentTag);
@@ -235,7 +247,7 @@ private void setupFragment() {
             if (pdfFragment == null) {
                 pdfFragment = PdfUiFragmentBuilder.fromDocumentDescriptor(getContext(), DocumentDescriptor.fromDocument(document))
                     .configuration(configuration)
-                    .fragmentClass(ConfigurationChangeReportingPdfUiFragment.class)
+                    .fragmentClass(ReactPdfUiFragment.class)
                     .build();
                 // We put our internal id so we can track if this fragment belongs to us, used to handle orphaned fragments after hot reloads.
                 pdfFragment.getArguments().putInt(ARG_ROOT_ID, internalId);
@@ -249,7 +261,7 @@ private void setupFragment() {
                     // The document changed create a new PdfFragment.
                     pdfFragment = PdfUiFragmentBuilder.fromDocumentDescriptor(getContext(), DocumentDescriptor.fromDocument(document))
                         .configuration(configuration)
-                        .fragmentClass(ConfigurationChangeReportingPdfUiFragment.class)
+                        .fragmentClass(ReactPdfUiFragment.class)
                         .build();
                     prepareFragment(pdfFragment);
                 } else if (fragmentView != null && fragmentView.getParent() != this) {
@@ -266,7 +278,7 @@ private void setupFragment() {
             }
 
             fragment = pdfFragment;
-            pdfUiFragmentGetter.onNext(fragment);
+            pdfUiFragmentGetter.onNext(Collections.singletonList(pdfFragment));
         }
     }
 
@@ -279,9 +291,17 @@ private void prepareFragment(final PdfUiFragment pdfUiFragment) {
 
         pdfUiFragment.setOnContextualToolbarLifecycleListener(pdfViewModeController);
         pdfUiFragment.getPSPDFKitViews().getFormEditingBarView().addOnFormEditingBarLifecycleListener(pdfViewModeController);
-        ((ConfigurationChangeReportingPdfUiFragment) pdfUiFragment).setOnConfigurationChangedListener(() -> {
-            // If the configuration was changed from the UI a new fragment will be created, reattach our listeners.
-            preparePdfFragment(pdfUiFragment.getPdfFragment());
+        ((ReactPdfUiFragment) pdfUiFragment).setReactPdfUiFragmentListener(new ReactPdfUiFragment.ReactPdfUiFragmentListener() {
+            @Override
+            public void onConfigurationChanged(@NonNull PdfUiFragment pdfUiFragment) {
+                // If the configuration was changed from the UI a new fragment will be created, reattach our listeners.
+                preparePdfFragment(pdfUiFragment.getPdfFragment());
+            }
+
+            @Override
+            public void onNavigationButtonClicked(@NonNull PdfUiFragment pdfUiFragment) {
+                eventDispatcher.dispatchEvent(new PdfViewNavigationButtonClickedEvent(getId()));
+            }
         });
 
         // After attaching the PdfUiFragment we can access the PdfFragment.
@@ -315,14 +335,14 @@ public void removeFragment(boolean makeInactive) {
             // Clear everything.
             isActive = false;
             document = null;
+
+            pendingFragmentActions.dispose();
+            pendingFragmentActions = new CompositeDisposable();
         }
 
         fragment = null;
 
-        pdfUiFragmentGetter.onComplete();
-        pdfUiFragmentGetter = BehaviorSubject.create();
-        pendingFragmentActions.dispose();
-        pendingFragmentActions = new CompositeDisposable();
+        pdfUiFragmentGetter.onNext(Collections.emptyList());
     }
 
     void manuallyLayoutChildren() {
@@ -622,9 +642,15 @@ public Maybe<Boolean> setFormFieldValue(@NonNull String formElementName, @NonNul
 
     /** Returns the {@link PdfFragment} hosted in the current {@link PdfUiFragment}. */
     private Observable<PdfFragment> getCurrentPdfFragment() {
+        return getPdfFragment()
+            .take(1);
+    }
+
+    /** Returns the {@link PdfUiFragment}. */
+    private Observable<PdfUiFragment> getCurrentPdfUiFragment() {
         return pdfUiFragmentGetter
-            .filter(pdfUiFragment -> pdfUiFragment.getPdfFragment() != null)
-            .map(PdfUiFragment::getPdfFragment)
+            .filter(pdfUiFragments -> !pdfUiFragments.isEmpty())
+            .map(pdfUiFragments -> pdfUiFragments.get(0))
             .take(1);
     }
 
@@ -642,24 +668,25 @@ public Maybe<PdfFragment> getActivePdfFragment() {
      */
     public Observable<PdfFragment> getPdfFragment() {
         return pdfUiFragmentGetter
+            .filter(pdfUiFragments -> !pdfUiFragments.isEmpty())
+            .map(pdfUiFragments -> pdfUiFragments.get(0))
             .filter(pdfUiFragment -> pdfUiFragment.getPdfFragment() != null)
             .map(PdfUiFragment::getPdfFragment);
     }
 
-    /** Returns the current fragment if it is set. */
-    public Maybe<PdfFragment> getFragment() {
-        return pdfUiFragmentGetter.firstElement().map(PdfUi::getPdfFragment);
-    }
-
     /** Returns the event registration map for the default events emitted by the {@link PdfView}. */
     public static  Map<String, Map<String, String>> createDefaultEventRegistrationMap() {
-       return MapBuilder.of(PdfViewStateChangedEvent.EVENT_NAME, MapBuilder.of("registrationName", "onStateChanged"),
+       Map<String , Map<String, String>> map = MapBuilder.of(PdfViewStateChangedEvent.EVENT_NAME, MapBuilder.of("registrationName", "onStateChanged"),
             PdfViewDocumentSavedEvent.EVENT_NAME, MapBuilder.of("registrationName", "onDocumentSaved"),
             PdfViewAnnotationTappedEvent.EVENT_NAME, MapBuilder.of("registrationName", "onAnnotationTapped"),
             PdfViewAnnotationChangedEvent.EVENT_NAME, MapBuilder.of("registrationName", "onAnnotationsChanged"),
             PdfViewDataReturnedEvent.EVENT_NAME, MapBuilder.of("registrationName", "onDataReturned"),
             PdfViewDocumentSaveFailedEvent.EVENT_NAME, MapBuilder.of("registrationName", "onDocumentSaveFailed"),
             PdfViewDocumentLoadFailedEvent.EVENT_NAME, MapBuilder.of("registrationName", "onDocumentLoadFailed")
         );
+
+       map.put(PdfViewNavigationButtonClickedEvent.EVENT_NAME, MapBuilder.of("registrationName", "onNavigationButtonClicked"));
+
+       return map;
     }
 }

android/src/main/java/com/pspdfkit/views/ReactPdfUiFragment.java

@@ -0,0 +1,67 @@
+package com.pspdfkit.views;
+
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+import androidx.appcompat.widget.Toolbar;
+
+import com.pspdfkit.configuration.activity.PdfActivityConfiguration;
+import com.pspdfkit.react.R;
+import com.pspdfkit.ui.PdfUiFragment;
+
+/**
+ * This {@link PdfUiFragment} provides additional callbacks to improve integration into react native.
+ * <p/>
+ * <ul>
+ * <li>A callback when the configuration was changed.</li>
+ * <li>A method to show and hide the navigation button in the toolbar, as well as a callback for when it is clicked.</li>
+ * </ul>
+ */
+public class ReactPdfUiFragment extends PdfUiFragment {
+
+    @Nullable private ReactPdfUiFragmentListener reactPdfUiFragmentListener;
+
+    void setReactPdfUiFragmentListener(@Nullable ReactPdfUiFragmentListener listener) {
+        this.reactPdfUiFragmentListener = listener;
+    }
+
+    @Override
+    public void performApplyConfiguration(@NonNull PdfActivityConfiguration configuration) {
+        super.performApplyConfiguration(configuration);
+
+        if (this.reactPdfUiFragmentListener != null) {
+            reactPdfUiFragmentListener.onConfigurationChanged(this);
+        }
+    }
+
+
+    /** When set to true will add a navigation arrow to the toolbar. */
+    void setShowNavigationButtonInToolbar(final boolean showNavigationButtonInToolbar) {
+        if (getView() == null) {
+            return;
+        }
+        Toolbar toolbar = getView().findViewById(R.id.pspdf__toolbar_main);
+        if (showNavigationButtonInToolbar) {
+            toolbar.setNavigationIcon(R.drawable.pspdf__ic_navigation_arrow);
+            toolbar.setNavigationOnClickListener(v -> {
+                if (reactPdfUiFragmentListener != null) {
+                    reactPdfUiFragmentListener.onNavigationButtonClicked(this);
+                }
+            });
+        } else {
+            toolbar.setNavigationIcon(null);
+            toolbar.setNavigationOnClickListener(null);
+        }
+    }
+
+    /**
+     * Listener that notifies of actions taken directly in the PdfUiFragment.
+     */
+    public interface ReactPdfUiFragmentListener {
+
+        /** Called when the configuration changed, reset your {@link com.pspdfkit.ui.PdfFragment} listeners in here. */
+        void onConfigurationChanged(@NonNull PdfUiFragment pdfUiFragment);
+
+        /** Called when the back navigation button was clicked. */
+        void onNavigationButtonClicked(@NonNull PdfUiFragment pdfUiFragment);
+    }
+}

android/src/main/res/drawable/pspdf__ic_navigation_arrow.xml

@@ -0,0 +1,9 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+        android:width="24dp"
+        android:height="24dp"
+        android:viewportWidth="24.0"
+        android:viewportHeight="24.0">
+    <path
+        android:fillColor="#FFFFFF"
+        android:pathData="M20,11H7.83l5.59,-5.59L12,4l-8,8 8,8 1.41,-1.41L7.83,13H20v-2z"/>
+</vector>