Added text size option

app/src/main/java/eu/faircode/email/AdapterMessage.java

@@ -28,6 +28,7 @@ import android.content.Intent;
 import android.content.SharedPreferences;
 import android.content.pm.PackageManager;
 import android.content.res.ColorStateList;
+import android.content.res.TypedArray;
 import android.database.Cursor;
 import android.graphics.Bitmap;
 import android.graphics.BitmapFactory;
@@ -114,6 +115,7 @@ public class AdapterMessage extends RecyclerView.Adapter<AdapterMessage.ViewHold
     private FragmentManager fragmentManager;
     private ViewType viewType;
     private boolean outgoing;
+    private int zoom;
     private IProperties properties;
 
     private boolean threading;
@@ -476,6 +478,22 @@ public class AdapterMessage extends RecyclerView.Adapter<AdapterMessage.ViewHold
 
                 vSeparatorBody.setVisibility(View.VISIBLE);
                 tvBody.setText(null);
+
+                TypedArray ta;
+                if (zoom == 0)
+                    ta = context.obtainStyledAttributes(
+                            R.style.TextAppearance_AppCompat_Small, new int[]{android.R.attr.textSize});
+                else if (zoom == 2)
+                    ta = context.obtainStyledAttributes(
+                            R.style.TextAppearance_AppCompat_Large, new int[]{android.R.attr.textSize});
+                else
+                    ta = context.obtainStyledAttributes(
+                            R.style.TextAppearance_AppCompat_Medium, new int[]{android.R.attr.textSize});
+                float textSize = ta.getDimension(0, 0);
+                if (textSize != 0)
+                    tvBody.setTextSize(textSize / context.getResources().getDisplayMetrics().density);
+                ta.recycle();
+
                 pbBody.setVisibility(View.VISIBLE);
 
                 if (message.content) {
@@ -1561,12 +1579,13 @@ public class AdapterMessage extends RecyclerView.Adapter<AdapterMessage.ViewHold
     }
 
     AdapterMessage(Context context, LifecycleOwner owner, FragmentManager fragmentManager,
-                   ViewType viewType, boolean outgoing, IProperties properties) {
+                   ViewType viewType, boolean outgoing, int zoom, IProperties properties) {
         this.context = context;
         this.owner = owner;
         this.fragmentManager = fragmentManager;
         this.viewType = viewType;
         this.outgoing = outgoing;
+        this.zoom = zoom;
         this.properties = properties;
 
         SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context);
@@ -1596,6 +1615,11 @@ public class AdapterMessage extends RecyclerView.Adapter<AdapterMessage.ViewHold
         return differ.getCurrentList();
     }
 
+    void setZoom(int zoom) {
+        this.zoom = zoom;
+        notifyDataSetChanged();
+    }
+
     @Override
     public int getItemCount() {
         return differ.getItemCount();

app/src/main/java/eu/faircode/email/FragmentMessages.java

@@ -97,6 +97,7 @@ public class FragmentMessages extends FragmentEx {
     private long id = -1;
     private String search = null;
 
+    private int zoom = 0;
     private boolean threading = true;
     private boolean actionbar = false;
     private boolean autoclose = false;
@@ -143,6 +144,8 @@ public class FragmentMessages extends FragmentEx {
         search = args.getString("search");
 
         SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(getContext());
+        boolean compact = prefs.getBoolean("compact", false);
+        zoom = prefs.getInt("zoom", compact ? 0 : 1);
         threading = prefs.getBoolean("threading", true);
         actionbar = prefs.getBoolean("actionbar", true);
         autoclose = prefs.getBoolean("autoclose", false);
@@ -294,6 +297,7 @@ public class FragmentMessages extends FragmentEx {
         adapter = new AdapterMessage(
                 getContext(), getViewLifecycleOwner(), getFragmentManager(),
                 viewType, outgoing,
+                zoom,
                 new AdapterMessage.IProperties() {
                     @Override
                     public void setExpanded(long id, boolean expand) {
@@ -1441,8 +1445,11 @@ public class FragmentMessages extends FragmentEx {
 
     @Override
     public void onPrepareOptionsMenu(Menu menu) {
-        menu.findItem(R.id.menu_search).setVisible(folder >= 0 && search == null);
-        menu.findItem(R.id.menu_sort_on).setVisible(TextUtils.isEmpty(search));
+        menu.findItem(R.id.menu_search).setVisible(
+                folder >= 0 && viewType != AdapterMessage.ViewType.SEARCH);
+        menu.findItem(R.id.menu_sort_on).setVisible(
+                viewType == AdapterMessage.ViewType.UNIFIED || viewType == AdapterMessage.ViewType.FOLDER);
+        menu.findItem(R.id.menu_zoom).setVisible(viewType == AdapterMessage.ViewType.THREAD);
         menu.findItem(R.id.menu_folders).setVisible(primary >= 0);
         menu.findItem(R.id.menu_folders).setIcon(connected ? R.drawable.baseline_folder_24 : R.drawable.baseline_folder_open_24);
         menu.findItem(R.id.menu_move_sent).setVisible(outbox);
@@ -1482,6 +1489,12 @@ public class FragmentMessages extends FragmentEx {
                 loadMessages();
                 return true;
 
+            case R.id.menu_zoom:
+                zoom = ++zoom % 3;
+                prefs.edit().putInt("zoom", zoom).apply();
+                adapter.setZoom(zoom);
+                return true;
+
             case R.id.menu_folders:
                 onMenuFolders();
                 loadMessages();

app/src/main/res/menu/menu_messages.xml

@@ -29,6 +29,12 @@
         </menu>
     </item>
 
+    <item
+        android:id="@+id/menu_zoom"
+        android:icon="@drawable/baseline_format_size_24"
+        android:title="@string/title_zoom"
+        app:showAsAction="ifRoom" />
+
     <item
         android:id="@+id/menu_folders"
         android:icon="@drawable/baseline_folder_open_24"

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

@@ -307,6 +307,8 @@
     <string name="title_sort_on_unread">Unread</string>
     <string name="title_sort_on_starred">Starred</string>
 
+    <string name="title_zoom">Text size</string>
+
     <string name="title_address_sent">Sent:</string>
     <string name="title_address_unsent">Unsent:</string>
     <string name="title_address_invalid">Invalid:</string>