emoji_keyboard: first keyboard, supports only unicode emojis

app/src/main/java/com/keylesspalace/tusky/adapter/UnicodeEmojiAdapter.java

@@ -0,0 +1,94 @@
+package com.keylesspalace.tusky.adapter;
+
+import android.view.*;
+import android.util.*;
+import com.google.android.material.tabs.TabLayout;
+import com.google.android.material.tabs.TabLayoutMediator;
+import com.google.android.flexbox.FlexboxLayoutManager;
+import androidx.viewpager2.widget.ViewPager2;
+import androidx.recyclerview.widget.*;
+import androidx.emoji.widget.EmojiAppCompatButton;
+import androidx.emoji.text.EmojiCompat;
+import com.keylesspalace.tusky.R;
+import com.keylesspalace.tusky.view.EmojiKeyboard;
+import com.keylesspalace.tusky.util.Emojis;
+
+public class UnicodeEmojiAdapter
+    extends RecyclerView.Adapter<SingleViewHolder>
+    implements TabLayoutMediator.TabConfigurationStrategy  {
+    
+    private String id;
+    private EmojiKeyboard.OnEmojiSelectedListener listener;
+    
+    private final static float BUTTON_WIDTH_DP = 65.0f; // empirically found value :(
+    
+    public UnicodeEmojiAdapter(String id, EmojiKeyboard.OnEmojiSelectedListener listener) {
+        super();
+        this.id = id;
+        this.listener = listener;
+    }
+    
+    @Override
+    public void onConfigureTab(TabLayout.Tab tab, int position) {
+        tab.setText(Emojis.EMOJIS[position][0]);
+    }
+        
+    @Override
+    public int getItemCount() {
+        return Emojis.EMOJIS.length;
+    }
+    
+    @Override
+    public void onBindViewHolder(SingleViewHolder holder, int position) {
+        ((RecyclerView)holder.itemView).setAdapter(new UnicodeEmojiPageAdapter(Emojis.EMOJIS[position], id, listener));
+    }
+    
+    @Override
+    public SingleViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
+        View view = LayoutInflater.from(parent.getContext())
+            .inflate(R.layout.item_emoji_keyboard_page, parent, false);
+        SingleViewHolder holder = new SingleViewHolder(view);
+        
+        DisplayMetrics dm = parent.getContext().getResources().getDisplayMetrics();
+        float wdp = dm.widthPixels / dm.density;
+        int rows = (int) (wdp / BUTTON_WIDTH_DP + 0.5);
+        
+        ((RecyclerView)view).setLayoutManager(new GridLayoutManager(view.getContext(), rows));
+        return holder;
+    }
+
+    private class UnicodeEmojiPageAdapter extends RecyclerView.Adapter<SingleViewHolder> {
+        private final String[] emojis;
+        private final String id;
+        private final EmojiKeyboard.OnEmojiSelectedListener listener;
+        
+        public UnicodeEmojiPageAdapter(String[] emojis, String id, EmojiKeyboard.OnEmojiSelectedListener listener) {
+            this.emojis = emojis;
+            this.id = id;
+            this.listener = listener;
+        }
+        
+        @Override
+        public int getItemCount() {
+            return emojis.length;
+        }
+        
+        @Override
+        public void onBindViewHolder(SingleViewHolder holder, int position) {
+            String emoji = emojis[position];
+            EmojiAppCompatButton btn = (EmojiAppCompatButton)holder.itemView;
+            
+            btn.setText(emoji);
+            btn.setOnClickListener(v -> listener.onEmojiSelected(id, emoji));
+        }
+        
+        @Override
+        public SingleViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
+            View view = LayoutInflater.from(parent.getContext())
+                .inflate(R.layout.item_emoji_keyboard_emoji, parent, false);
+            return new SingleViewHolder(view);
+        }
+    }
+    
+}
+ 

app/src/main/java/com/keylesspalace/tusky/view/EmojiKeyboard.java

@@ -0,0 +1,89 @@
+package com.keylesspalace.tusky.view;
+
+import android.view.*;
+import android.content.*;
+import android.util.*;
+import android.widget.*;
+import android.app.*;
+import com.google.android.material.tabs.TabLayout;
+import com.google.android.material.tabs.TabLayoutMediator;
+import androidx.viewpager2.widget.ViewPager2;
+import androidx.recyclerview.widget.RecyclerView;
+import com.keylesspalace.tusky.R;
+import com.keylesspalace.tusky.adapter.UnicodeEmojiAdapter;
+
+public class EmojiKeyboard extends LinearLayout {
+    private TabLayout tabs;
+    private ViewPager2 pager;
+    private TabLayoutMediator currentMediator;
+
+    public EmojiKeyboard(Context context) {
+        super(context);
+        init(context);
+    }
+
+    public EmojiKeyboard(Context context, AttributeSet attrs) {
+        super(context, attrs);
+        init(context);
+    }
+
+    public EmojiKeyboard(Context context, AttributeSet attrs, int defStyleAttr) {
+        super(context, attrs, defStyleAttr);
+        init(context);
+    }
+        
+    void init(Context context) {
+        inflate(context, R.layout.item_emoji_picker, this);
+        
+        tabs = findViewById(R.id.picker_tabs);
+        pager = findViewById(R.id.picker_pager);
+    }
+    
+    public static final int UNICODE_MODE = 0;
+    public static final int CUSTOM_MODE  = 1;
+    public static final int STICKER_MODE = 2;
+    
+    void setupKeyboard(String id, int mode, OnEmojiSelectedListener listener) {
+        RecyclerView.Adapter adapter;
+    
+        switch(mode) {
+	        case CUSTOM_MODE:
+	        // UNDONE
+            //break;
+            case STICKER_MODE:
+            // UNDONE
+            //break;
+            default:
+            case UNICODE_MODE:
+                adapter = new UnicodeEmojiAdapter(id, listener);
+            break;
+        }
+        
+        pager.setAdapter(adapter);
+        
+        if(currentMediator != null)
+	        currentMediator.detach();
+        
+        currentMediator = new TabLayoutMediator(tabs, pager, (TabLayoutMediator.TabConfigurationStrategy)adapter);
+        currentMediator.attach();
+    }
+    
+    public interface OnEmojiSelectedListener {
+        void onEmojiSelected(String id, String emoji);
+    }
+    
+    public static void show(Context ctx, String id, int mode, OnEmojiSelectedListener listener) {
+        final Dialog dialog = new Dialog(ctx);
+        
+        dialog.setTitle(null);
+        dialog.requestWindowFeature(Window.FEATURE_NO_TITLE);
+        dialog.setContentView(R.layout.dialog_emoji_keyboard);
+        EmojiKeyboard kbd = (EmojiKeyboard)dialog.findViewById(R.id.dialog_emoji_keyboard);
+        kbd.setupKeyboard(id, mode, (_id, _emoji) -> {
+            listener.onEmojiSelected(_id, _emoji);
+            dialog.dismiss();
+        });
+        
+        dialog.show();
+    }
+}

app/src/main/res/layout/dialog_emoji_keyboard.xml

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="utf-8"?>
+<com.keylesspalace.tusky.view.EmojiKeyboard
+	xmlns:android="http://schemas.android.com/apk/res/android"
+	xmlns:app="http://schemas.android.com/apk/res-auto"
+	xmlns:tools="http://schemas.android.com/tools"
+	android:id="@+id/dialog_emoji_keyboard"
+	android:layout_width="320dp"
+	android:layout_height="250dp" />

app/src/main/res/layout/item_emoji_keyboard_emoji.xml

@@ -0,0 +1,20 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- not a best way but I'm lazy to do proper button -->
+<androidx.emoji.widget.EmojiAppCompatButton
+	xmlns:android="http://schemas.android.com/apk/res/android"
+	xmlns:app="http://schemas.android.com/apk/res-auto"
+	xmlns:tools="http://schemas.android.com/tools"
+	android:id="@+id/emoji_keyboard_emoji"
+	android:layout_width="wrap_content"
+	android:layout_height="wrap_content"
+	android:layout_marginRight="0dp"
+	android:layout_marginBottom="0dp"
+	android:layout_marginLeft="0dp"
+	android:layout_marginTop="0dp"
+	android:minWidth="0dp"
+	android:lines="1"
+	android:textAlignment="viewStart"
+	android:textColor="?android:attr/textColorPrimary"
+	android:textSize="?attr/status_text_medium"
+	app:backgroundTint="@color/emoji_reaction_button"
+	tools:text="A" />

app/src/main/res/layout/item_emoji_keyboard_page.xml

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.recyclerview.widget.RecyclerView
+	xmlns:android="http://schemas.android.com/apk/res/android"
+	xmlns:app="http://schemas.android.com/apk/res-auto"
+	xmlns:tools="http://schemas.android.com/tools"
+	android:layout_width="match_parent"
+	android:layout_height="match_parent"
+	android:nestedScrollingEnabled="false" />

app/src/main/res/layout/item_emoji_picker.xml

@@ -0,0 +1,24 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+	xmlns:app="http://schemas.android.com/apk/res-auto"
+	xmlns:tools="http://schemas.android.com/tools"
+	android:layout_width="match_parent"
+	android:layout_height="250dp"
+	android:orientation="vertical">
+	
+	<com.google.android.material.tabs.TabLayout
+		android:id="@+id/picker_tabs"
+		android:layout_width="match_parent"
+		android:layout_height="wrap_content"
+		app:tabMaxWidth="0dp"
+		app:tabMinWidth="0dp"
+		app:tabGravity="fill"
+		app:tabMode="scrollable" />
+	
+	<androidx.viewpager2.widget.ViewPager2
+		android:id="@+id/picker_pager"
+		android:layout_width="match_parent"
+		android:layout_height="match_parent"
+		android:layout_weight="1"
+		android:background="?attr/windowBackgroundColor" />
+</LinearLayout>