[PwdCheckAndroid] Create coordinator when frame is attached

Instead of using the factory directly in the fragment, the parent
activity will now check whether the newly attached fragment has a known
component and creates it using the factory.

The functionality and visible behavior is unchanged.

Bug: 1101256, 1092444
Change-Id: If430d33d9c895eeed1503253ff5a279cfeae394c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2315149
Commit-Queue: Ioana Pandele <ioanap@chromium.org>
Reviewed-by: Ioana Pandele <ioanap@chromium.org>
Reviewed-by: Natalie Chouinard <chouinard@chromium.org>
Cr-Commit-Position: refs/heads/master@{#791754}

chrome/android/java/src/org/chromium/chrome/browser/settings/SettingsActivity.java

@@ -29,6 +29,8 @@ import org.chromium.chrome.R;
 import org.chromium.chrome.browser.ChromeBaseAppCompatActivity;
 import org.chromium.chrome.browser.help.HelpAndFeedback;
 import org.chromium.chrome.browser.init.ChromeBrowserInitializer;
+import org.chromium.chrome.browser.password_check.PasswordCheckComponentUiFactory;
+import org.chromium.chrome.browser.password_check.PasswordCheckFragmentView;
 import org.chromium.chrome.browser.profiles.Profile;
 import org.chromium.chrome.browser.profiles.ProfileManagerUtils;
 import org.chromium.chrome.browser.safety_check.SafetyCheckCoordinator;
@@ -280,6 +282,8 @@ public class SettingsActivity extends ChromeBaseAppCompatActivity
         } else if (fragment instanceof SafetyCheckSettingsFragment) {
             SafetyCheckCoordinator.create((SafetyCheckSettingsFragment) fragment,
                     new SafetyCheckUpdatesDelegateImpl(this));
+        } else if (fragment instanceof PasswordCheckFragmentView) {
+            PasswordCheckComponentUiFactory.create((PasswordCheckFragmentView) fragment);
         }
     }
 

chrome/browser/password_check/android/BUILD.gn

@@ -78,6 +78,7 @@ android_library("test_java") {
     ":public_java",
     ":public_ui_java",
     "internal:internal_java",
+    "internal:internal_ui_factory_java",
     "//base:base_java",
     "//base:base_java_test_support",
     "//chrome/android:chrome_java",

chrome/browser/password_check/android/internal/BUILD.gn

@@ -39,6 +39,7 @@ android_library_factory("public_ui_factory_java") {
 android_library("internal_ui_factory_java") {
   deps = [
     ":internal_java",
+    "//third_party/android_deps:androidx_annotation_annotation_java",
     _public_target,
   ]
   sources = _ui_factory_sources
@@ -60,6 +61,7 @@ android_library("internal_java") {
     "//components/embedder_support/android:util_java",
     "//third_party/android_deps:androidx_annotation_annotation_java",
     "//third_party/android_deps:androidx_fragment_fragment_java",
+    "//third_party/android_deps:androidx_lifecycle_lifecycle_common_java",
     "//third_party/android_deps:androidx_preference_preference_java",
     "//third_party/android_deps:androidx_recyclerview_recyclerview_java",
     "//ui/android:ui_full_java",

chrome/browser/password_check/android/internal/java/src/org/chromium/chrome/browser/password_check/PasswordCheckComponentUiFactory.java

@@ -4,12 +4,26 @@
 
 package org.chromium.chrome.browser.password_check;
 
+import androidx.annotation.VisibleForTesting;
 import androidx.preference.PreferenceFragmentCompat;
 
 /**
  * Use {@link #create()} to instantiate a {@link PasswordCheckComponentUi}.
  */
-class PasswordCheckComponentUiFactory {
+public class PasswordCheckComponentUiFactory {
+    /**
+     * The factory used to create components that connect to this fragment and provide data.
+     */
+    interface CreationStrategy {
+        /**
+         * Returns a component that connects to the given fragment and manipulates its data.
+         * @param fragmentView A {@link PasswordCheckFragmentView}.
+         * @return A non-null {@link PasswordCheckComponentUi}.
+         */
+        PasswordCheckComponentUi create(PasswordCheckFragmentView fragmentView);
+    }
+    private static CreationStrategy sCreationStrategy = PasswordCheckCoordinator::new;
+
     private PasswordCheckComponentUiFactory() {}
 
     /**
@@ -18,6 +32,11 @@ class PasswordCheckComponentUiFactory {
      * @return A {@link PasswordCheckComponentUi}.
      */
     public static PasswordCheckComponentUi create(PreferenceFragmentCompat fragmentView) {
-        return new PasswordCheckCoordinator((PasswordCheckFragmentView) fragmentView);
+        return sCreationStrategy.create((PasswordCheckFragmentView) fragmentView);
+    }
+
+    @VisibleForTesting
+    static void setCreationStrategy(CreationStrategy creationStrategy) {
+        sCreationStrategy = creationStrategy;
     }
 }
\ No newline at end of file

chrome/browser/password_check/android/internal/java/src/org/chromium/chrome/browser/password_check/PasswordCheckCoordinator.java

@@ -7,6 +7,9 @@ package org.chromium.chrome.browser.password_check;
 import android.view.MenuItem;
 
 import androidx.annotation.VisibleForTesting;
+import androidx.lifecycle.Lifecycle;
+import androidx.lifecycle.LifecycleObserver;
+import androidx.lifecycle.OnLifecycleEvent;
 
 import org.chromium.chrome.browser.help.HelpAndFeedback;
 import org.chromium.chrome.browser.profiles.Profile;
@@ -17,8 +20,9 @@ import org.chromium.ui.modelutil.PropertyModelChangeProcessor;
  * Creates the PasswordCheckComponentUi. This class is responsible for managing the UI for the check
  * of the leaked password.
  */
-class PasswordCheckCoordinator implements PasswordCheckComponentUi {
+class PasswordCheckCoordinator implements PasswordCheckComponentUi, LifecycleObserver {
     private final PasswordCheckFragmentView mFragmentView;
+    private PropertyModel mModel;
 
     /**
      * Blueprint for a class that handles interactions with credentials.
@@ -33,10 +37,20 @@ class PasswordCheckCoordinator implements PasswordCheckComponentUi {
 
     PasswordCheckCoordinator(PasswordCheckFragmentView fragmentView) {
         mFragmentView = fragmentView;
-        PropertyModel model = PasswordCheckProperties.createDefaultModel();
+        // TODO(crbug.com/1101256): If help is part of the view, make mediator the delegate.
+        mFragmentView.setComponentDelegate(this);
+        mFragmentView.getLifecycle().addObserver(this);
+    }
+
+    @OnLifecycleEvent(Lifecycle.Event.ON_START)
+    public void connectToModelWhenViewIsReady() {
+        // In the rare case of a restarted activity, don't recreate the model and mediator.
+        if (mModel == null) {
+            mModel = PasswordCheckProperties.createDefaultModel();
             PasswordCheckMediator mediator = new PasswordCheckMediator();
-        PasswordCheckCoordinator.setUpModelChangeProcessors(model, mFragmentView);
-        mediator.initialize(model, PasswordCheckFactory.create());
+            PasswordCheckCoordinator.setUpModelChangeProcessors(mModel, mFragmentView);
+            mediator.initialize(mModel, PasswordCheckFactory.create());
+        }
     }
 
     // TODO(crbug.com/1101256): Move to view code.

chrome/browser/password_check/android/java/src/org/chromium/chrome/browser/password_check/PasswordCheckFragmentView.java

@@ -8,8 +8,6 @@ import android.content.Context;
 import android.os.Bundle;
 import android.view.MenuItem;
 
-import androidx.annotation.Nullable;
-import androidx.annotation.VisibleForTesting;
 import androidx.preference.PreferenceFragmentCompat;
 
 /**
@@ -19,18 +17,12 @@ public class PasswordCheckFragmentView extends PreferenceFragmentCompat {
     private PasswordCheckComponentUi mComponentDelegate;
 
     /**
-     * The factory used to create components that connect to this fragment and provide data. It
-     * defaults to the {@link PasswordCheckComponentUiFactory} but can be replaced in tests.
+     * Set the delegate that handles view events which affect the state of the component.
+     * @param componentDelegate The {@link PasswordCheckComponentUi} delegate.
      */
-    interface ComponentFactory {
-        /**
-         * Returns a component that is connected to the given fragment and manipulates its data.
-         * @param fragmentView The fragment (usually {@code this}).
-         * @return A non-null {@link PasswordCheckComponentUi}.
-         */
-        PasswordCheckComponentUi create(PreferenceFragmentCompat fragmentView);
+    void setComponentDelegate(PasswordCheckComponentUi componentDelegate) {
+        mComponentDelegate = componentDelegate;
     }
-    private static ComponentFactory sComponentFactory = PasswordCheckComponentUiFactory::create;
 
     @Override
     public void onCreatePreferences(Bundle savedInstanceState, String rootKey) {
@@ -38,12 +30,6 @@ public class PasswordCheckFragmentView extends PreferenceFragmentCompat {
         setPreferenceScreen(getPreferenceManager().createPreferenceScreen(getStyledContext()));
     }
 
-    @Override
-    public void onActivityCreated(@Nullable Bundle savedInstanceState) {
-        super.onActivityCreated(savedInstanceState);
-        mComponentDelegate = sComponentFactory.create(this);
-    }
-
     @Override
     public boolean onOptionsItemSelected(MenuItem item) {
         return mComponentDelegate.handleHelp(item);
@@ -53,8 +39,4 @@ public class PasswordCheckFragmentView extends PreferenceFragmentCompat {
         return getPreferenceManager().getContext();
     }
 
-    @VisibleForTesting
-    static void setComponentFactory(ComponentFactory factory) {
-        sComponentFactory = factory;
-    }
 }
\ No newline at end of file

chrome/browser/password_check/android/javatests/src/org/chromium/chrome/browser/password_check/PasswordCheckViewTest.java

@@ -77,8 +77,9 @@ public class PasswordCheckViewTest {
     @Before
     public void setUp() throws InterruptedException {
         MockitoAnnotations.initMocks(this);
-        PasswordCheckFragmentView.setComponentFactory(fragmentView -> {
+        PasswordCheckComponentUiFactory.setCreationStrategy(fragmentView -> {
             mPasswordCheckView = (PasswordCheckFragmentView) fragmentView;
+            mPasswordCheckView.setComponentDelegate(mComponentUi);
             return mComponentUi;
         });
         mTestRule.startSettingsActivity();