Add AdaptiveActionsToolbar for better context bar controls.

app/src/main/java/org/thoughtcrime/securesms/conversation/ConversationFragment.java

@@ -114,6 +114,7 @@
 import org.thoughtcrime.securesms.util.concurrent.SignalExecutors;
 import org.thoughtcrime.securesms.util.concurrent.SimpleTask;
 import org.thoughtcrime.securesms.util.task.ProgressDialogAsyncTask;
+import org.thoughtcrime.securesms.util.views.AdaptiveActionsToolbar;
 import org.whispersystems.libsignal.util.guava.Optional;
 
 import java.io.IOException;
@@ -1211,6 +1212,7 @@ public boolean onCreateActionMode(ActionMode mode, Menu menu) {
       }
 
       setCorrectMenuVisibility(menu);
+      AdaptiveActionsToolbar.adjustMenuActions(menu, 10, requireActivity().getWindow().getDecorView().getMeasuredWidth());
       listener.onMessageActionToolbarOpened();
       return true;
     }

app/src/main/java/org/thoughtcrime/securesms/util/ViewUtil.java

@@ -29,6 +29,8 @@
 import androidx.annotation.Nullable;
 import androidx.core.view.ViewCompat;
 import androidx.interpolator.view.animation.FastOutSlowInInterpolator;
+
+import android.util.TypedValue;
 import android.view.Gravity;
 import android.view.LayoutInflater;
 import android.view.View;
@@ -203,6 +205,14 @@ public static int dpToPx(int dp) {
     return Math.round(dp * Resources.getSystem().getDisplayMetrics().density);
   }
 
+  public static int dpToSp(int dp) {
+    return (int) (dpToPx(dp) / Resources.getSystem().getDisplayMetrics().scaledDensity);
+  }
+
+  public static int spToPx(float sp) {
+    return (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_SP, sp, Resources.getSystem().getDisplayMetrics());
+  }
+
   public static void updateLayoutParams(@NonNull View view, int width, int height) {
     view.getLayoutParams().width  = width;
     view.getLayoutParams().height = height;

app/src/main/java/org/thoughtcrime/securesms/util/views/AdaptiveActionsToolbar.java

@@ -0,0 +1,86 @@
+package org.thoughtcrime.securesms.util.views;
+
+import android.content.Context;
+import android.content.res.TypedArray;
+import android.util.AttributeSet;
+import android.view.Menu;
+import android.view.MenuItem;
+
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+import androidx.appcompat.widget.Toolbar;
+
+import org.thoughtcrime.securesms.R;
+import org.thoughtcrime.securesms.util.ViewUtil;
+
+/**
+ * AdaptiveActionsToolbar behaves like a normal {@link Toolbar} except in that it ignores the
+ * showAsAlways attributes of menu items added via menu inflation, opting for an adaptive algorithm
+ * instead. This algorithm will display as many icons as it can up to a specific percentage of the
+ * screen.
+ *
+ * Each ActionView icon is expected to occupy 48dp of space, including padding. Items are stacked one
+ * after the next with no margins.
+ *
+ * This view can be customized via attributes:
+ *
+ * aat_max_shown           -- controls the max number of items to display.
+ * aat_percent_for_actions -- controls the max percent of screen width the buttons can occupy.
+ */
+public class AdaptiveActionsToolbar extends Toolbar {
+
+  private static final int   NAVIGATION_SP          = 48;
+  private static final int   ACTION_VIEW_WIDTH_SP   = 42;
+  private static final int   OVERFLOW_VIEW_WIDTH_SP = 35;
+
+  private int   maxShown;
+
+  public AdaptiveActionsToolbar(@NonNull Context context) {
+    this(context, null);
+  }
+
+  public AdaptiveActionsToolbar(@NonNull Context context, @Nullable AttributeSet attrs) {
+    this(context, attrs, R.attr.toolbarStyle);
+  }
+
+  public AdaptiveActionsToolbar(@NonNull Context context, @Nullable AttributeSet attrs, int defStyleAttr) {
+    super(context, attrs, defStyleAttr);
+
+    TypedArray array = context.obtainStyledAttributes(attrs, R.styleable.AdaptiveActionsToolbar);
+
+    maxShown = array.getInteger(R.styleable.AdaptiveActionsToolbar_aat_max_shown, 100);
+
+    array.recycle();
+  }
+
+  @Override
+  protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
+    super.onMeasure(widthMeasureSpec, heightMeasureSpec);
+    adjustMenuActions(getMenu(), maxShown, getMeasuredWidth());
+    super.onMeasure(widthMeasureSpec, heightMeasureSpec);
+  }
+
+  public static void adjustMenuActions(@NonNull Menu menu, int maxToShow, int toolbarWidthPx) {
+    int menuSize = menu.size();
+
+    int widthAllowed = toolbarWidthPx - ViewUtil.spToPx(NAVIGATION_SP);
+    int nItemsToShow = Math.min(maxToShow, Math.round(widthAllowed / ViewUtil.spToPx(ACTION_VIEW_WIDTH_SP)));
+
+    if (nItemsToShow < menuSize) {
+      widthAllowed -= ViewUtil.spToPx(OVERFLOW_VIEW_WIDTH_SP);
+    }
+
+    nItemsToShow = Math.min(maxToShow, Math.round(widthAllowed / ViewUtil.spToPx(ACTION_VIEW_WIDTH_SP)));
+
+    for (int i = 0; i < menu.size(); i++) {
+      MenuItem item = menu.getItem(i);
+      if (nItemsToShow > 0) {
+        item.setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS);
+      } else {
+        item.setShowAsAction(MenuItem.SHOW_AS_ACTION_NEVER);
+      }
+      nItemsToShow--;
+    }
+  }
+
+}

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

@@ -1,11 +1,11 @@
 <?xml version="1.0" encoding="utf-8"?>
-<androidx.appcompat.widget.Toolbar xmlns:android="http://schemas.android.com/apk/res/android"
+<org.thoughtcrime.securesms.util.views.AdaptiveActionsToolbar xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto"
     android:layout_width="match_parent"
     android:layout_height="?attr/actionBarSize"
     android:background="@color/action_mode_status_bar"
     android:theme="@style/TextSecure.DarkActionBar.Conversation"
-    app:navigationIcon="@drawable/ic_x_conversation"
-    app:menu="@menu/conversation_reactions_long_press_menu">
+    app:menu="@menu/conversation_reactions_long_press_menu"
+    app:navigationIcon="@drawable/ic_x_conversation">
 
-</androidx.appcompat.widget.Toolbar>
+</org.thoughtcrime.securesms.util.views.AdaptiveActionsToolbar>

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

@@ -454,4 +454,8 @@
     <declare-styleable name="ReactionsConversationView">
       <attr name="rcv_outgoing" format="boolean" />
     </declare-styleable>
+
+    <declare-styleable name="AdaptiveActionsToolbar">
+        <attr name="aat_max_shown" format="integer" />
+    </declare-styleable>
 </resources>