fix(discover): provide WebUri for fragments

Fixes an issue, where the discover fragments did not display their URL
in the recents overview.

mastodon/src/main/java/org/joinmastodon/android/fragments/discover/DiscoverFragment.java

@@ -1,6 +1,7 @@
 package org.joinmastodon.android.fragments.discover;
 
 import android.app.Fragment;
+import android.app.assist.AssistContent;
 import android.os.Build;
 import android.os.Bundle;
 import android.text.TextUtils;
@@ -24,6 +25,7 @@ import org.joinmastodon.android.ui.SimpleViewHolder;
 import org.joinmastodon.android.ui.tabs.TabLayout;
 import org.joinmastodon.android.ui.tabs.TabLayoutMediator;
 import org.joinmastodon.android.ui.utils.UiUtils;
+import org.joinmastodon.android.utils.ProvidesAssistContent;
 
 import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
@@ -35,7 +37,7 @@ import me.grishka.appkit.fragments.BaseRecyclerFragment;
 import me.grishka.appkit.fragments.OnBackPressedListener;
 import me.grishka.appkit.utils.V;
 
-public class DiscoverFragment extends AppKitFragment implements ScrollableToTop, OnBackPressedListener, IsOnTop {
+public class DiscoverFragment extends AppKitFragment implements ScrollableToTop, OnBackPressedListener, IsOnTop, ProvidesAssistContent{
 	private static final int QUERY_RESULT=937;
 
 	private TabLayout tabLayout;
@@ -291,6 +293,13 @@ public class DiscoverFragment extends AppKitFragment implements ScrollableToTop,
 		}
 	}
 
+	@Override
+	public void onProvideAssistContent(AssistContent assistContent) {
+		callFragmentToProvideAssistContent(searchActive
+				? searchFragment
+				: getFragmentForPage(pager.getCurrentItem()), assistContent);
+	}
+
 	private class DiscoverPagerAdapter extends RecyclerView.Adapter<SimpleViewHolder>{
 		@NonNull
 		@Override

mastodon/src/main/java/org/joinmastodon/android/fragments/discover/DiscoverNewsFragment.java

@@ -2,6 +2,7 @@ package org.joinmastodon.android.fragments.discover;
 
 import android.graphics.Rect;
 import android.graphics.drawable.Drawable;
+import android.net.Uri;
 import android.os.Build;
 import android.os.Bundle;
 import android.view.View;
@@ -19,6 +20,7 @@ import org.joinmastodon.android.ui.OutlineProviders;
 import org.joinmastodon.android.ui.drawables.BlurhashCrossfadeDrawable;
 import org.joinmastodon.android.ui.utils.DiscoverInfoBannerHelper;
 import org.joinmastodon.android.ui.utils.UiUtils;
+import org.joinmastodon.android.utils.ProvidesAssistContent;
 
 import java.util.ArrayList;
 import java.util.List;
@@ -40,7 +42,7 @@ import me.grishka.appkit.utils.SingleViewRecyclerAdapter;
 import me.grishka.appkit.utils.V;
 import me.grishka.appkit.views.UsableRecyclerView;
 
-public class DiscoverNewsFragment extends BaseRecyclerFragment<CardViewModel> implements ScrollableToTop, IsOnTop{
+public class DiscoverNewsFragment extends BaseRecyclerFragment<CardViewModel> implements ScrollableToTop, IsOnTop, ProvidesAssistContent.ProvidesWebUri{
 	private String accountID;
 	private DiscoverInfoBannerHelper bannerHelper;
 	private MergeRecyclerAdapter mergeAdapter;
@@ -115,6 +117,16 @@ public class DiscoverNewsFragment extends BaseRecyclerFragment<CardViewModel> im
 		return isRecyclerViewOnTop(list);
 	}
 
+	@Override
+	public String getAccountID() {
+		return accountID;
+	}
+
+	@Override
+	public Uri getWebUri(Uri.Builder base) {
+		return isInstanceAkkoma() ? null : base.path("/explore/links").build();
+	}
+
 	private class LinksAdapter extends UsableRecyclerView.Adapter<BaseLinkViewHolder> implements ImageLoaderRecyclerAdapter{
 		private final List<CardViewModel> data;
 

mastodon/src/main/java/org/joinmastodon/android/fragments/discover/TrendingHashtagsFragment.java

@@ -1,5 +1,6 @@
 package org.joinmastodon.android.fragments.discover;
 
+import android.net.Uri;
 import android.os.Build;
 import android.os.Bundle;
 import android.view.View;
@@ -13,6 +14,7 @@ import org.joinmastodon.android.fragments.ScrollableToTop;
 import org.joinmastodon.android.model.Hashtag;
 import org.joinmastodon.android.ui.utils.UiUtils;
 import org.joinmastodon.android.ui.views.HashtagChartView;
+import org.joinmastodon.android.utils.ProvidesAssistContent;
 
 import java.util.List;
 
@@ -23,7 +25,7 @@ import me.grishka.appkit.fragments.BaseRecyclerFragment;
 import me.grishka.appkit.utils.BindableViewHolder;
 import me.grishka.appkit.views.UsableRecyclerView;
 
-public class TrendingHashtagsFragment extends BaseRecyclerFragment<Hashtag> implements ScrollableToTop, IsOnTop{
+public class TrendingHashtagsFragment extends BaseRecyclerFragment<Hashtag> implements ScrollableToTop, IsOnTop, ProvidesAssistContent.ProvidesWebUri{
 	private String accountID;
 
 	public TrendingHashtagsFragment(){
@@ -65,6 +67,16 @@ public class TrendingHashtagsFragment extends BaseRecyclerFragment<Hashtag> impl
 		return isRecyclerViewOnTop(list);
 	}
 
+	@Override
+	public String getAccountID() {
+		return accountID;
+	}
+
+	@Override
+	public Uri getWebUri(Uri.Builder base) {
+		return isInstanceAkkoma() ? null : base.path("/explore/tags").build();
+	}
+
 	private class HashtagsAdapter extends RecyclerView.Adapter<HashtagViewHolder>{
 		@NonNull
 		@Override