From 5782c8a58bcdf8992e3ff0ad9ee815cfa6ecc4d3 Mon Sep 17 00:00:00 2001
From: Alan Evans <alan@signal.org>
Date: Fri, 6 Dec 2019 08:43:04 -0500
Subject: [PATCH] Make media overview view pager scrollable for long
 translations.

---
 res/layout/media_overview_activity.xml        |  3 +--
 .../mediaoverview/MediaOverviewActivity.java  | 22 +++++++++++++++++++
 2 files changed, 23 insertions(+), 2 deletions(-)

diff --git a/res/layout/media_overview_activity.xml b/res/layout/media_overview_activity.xml
index 2e57534c1b..b6b13cb9b3 100644
--- a/res/layout/media_overview_activity.xml
+++ b/res/layout/media_overview_activity.xml
@@ -25,10 +25,9 @@
             android:id="@+id/tab_layout"
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
-            android:layout_gravity="top"
             android:background="?attr/media_overview_toolbar_background"
-            app:tabBackground="?attr/media_overview_toolbar_background"
             app:tabIndicatorColor="@color/textsecure_primary"
+            app:tabMode="scrollable"
             app:tabSelectedTextColor="@color/textsecure_primary" />
 
     </com.google.android.material.appbar.AppBarLayout>
diff --git a/src/org/thoughtcrime/securesms/mediaoverview/MediaOverviewActivity.java b/src/org/thoughtcrime/securesms/mediaoverview/MediaOverviewActivity.java
index b23e47f986..ee61b59aab 100644
--- a/src/org/thoughtcrime/securesms/mediaoverview/MediaOverviewActivity.java
+++ b/src/org/thoughtcrime/securesms/mediaoverview/MediaOverviewActivity.java
@@ -21,6 +21,7 @@ import android.content.Intent;
 import android.os.Bundle;
 import android.view.MenuItem;
 import android.view.View;
+import android.view.ViewGroup;
 import android.widget.TextView;
 
 import androidx.annotation.NonNull;
@@ -95,6 +96,8 @@ public final class MediaOverviewActivity extends PassphraseRequiredActionBarActi
 
     boolean allThreads = threadId == MediaDatabase.ALL_THREADS;
 
+    fillTabLayoutIfFits(tabLayout);
+
     tabLayout.setupWithViewPager(viewPager);
     viewPager.setAdapter(new MediaOverviewPagerAdapter(getSupportFragmentManager()));
 
@@ -228,6 +231,25 @@ public final class MediaOverviewActivity extends PassphraseRequiredActionBarActi
       .show();
   }
 
+  private static void fillTabLayoutIfFits(@NonNull TabLayout tabLayout) {
+    tabLayout.addOnLayoutChangeListener((v, left, top, right, bottom, oldLeft, oldTop, oldRight, oldBottom) -> {
+      int totalWidth = 0;
+      int maxWidth   = 0;
+      ViewGroup tabs = (ViewGroup) tabLayout.getChildAt(0);
+
+      for (int i = 0; i < tabLayout.getTabCount(); i++) {
+        int tabWidth = tabs.getChildAt(i).getWidth();
+        totalWidth += tabWidth;
+        maxWidth = Math.max(maxWidth, tabWidth);
+      }
+
+      int viewWidth = right - left;
+      if (totalWidth < viewWidth) {
+        tabLayout.setTabMode(TabLayout.MODE_FIXED);
+      }
+    });
+  }
+
   private class MediaOverviewPagerAdapter extends FragmentStatePagerAdapter {
 
     private final List<Pair<MediaLoader.MediaType, CharSequence>> pages;