Added option to send plain text by default

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

@@ -1952,6 +1952,9 @@ public class FragmentCompose extends FragmentBase {
             File ics = (File) args.getSerializable("ics");
             long answer = args.getLong("answer", -1);
 
+            SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context);
+            boolean plain_only = prefs.getBoolean("plain_only", false);
+
             Log.i("Load draft action=" + action + " id=" + id + " reference=" + reference);
 
             EntityMessage draft;
@@ -2102,6 +2105,9 @@ public class FragmentCompose extends FragmentBase {
                         EntityOperation.queue(context, ref, EntityOperation.SEEN, true);
                     }
 
+                    if (plain_only)
+                        draft.plain_only = true;
+
                     // Select identity matching from address
                     int icount = 0;
                     EntityIdentity first = null;

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

@@ -39,6 +39,7 @@ import androidx.preference.PreferenceManager;
 
 public class FragmentOptionsSend extends FragmentBase implements SharedPreferences.OnSharedPreferenceChangeListener {
     private SwitchCompat swPrefixOnce;
+    private SwitchCompat swPlainOnly;
     private SwitchCompat swAutoResize;
     private Spinner spAutoResize;
     private TextView tvAutoResize;
@@ -46,7 +47,7 @@ public class FragmentOptionsSend extends FragmentBase implements SharedPreferenc
     private Spinner spSendDelayed;
 
     private final static String[] RESET_OPTIONS = new String[]{
-            "prefix_once", "autoresize", "resize", "autosend", "send_delayed"
+            "prefix_once", "plain_only", "autoresize", "resize", "autosend", "send_delayed"
     };
 
     @Override
@@ -60,6 +61,7 @@ public class FragmentOptionsSend extends FragmentBase implements SharedPreferenc
         // Get controls
 
         swPrefixOnce = view.findViewById(R.id.swPrefixOnce);
+        swPlainOnly = view.findViewById(R.id.swPlainOnly);
         swAutoResize = view.findViewById(R.id.swAutoResize);
         spAutoResize = view.findViewById(R.id.spAutoResize);
         tvAutoResize = view.findViewById(R.id.tvAutoResize);
@@ -79,6 +81,13 @@ public class FragmentOptionsSend extends FragmentBase implements SharedPreferenc
             }
         });
 
+        swPlainOnly.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
+            @Override
+            public void onCheckedChanged(CompoundButton compoundButton, boolean checked) {
+                prefs.edit().putBoolean("plain_only", checked).apply();
+            }
+        });
+
         swAutoResize.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
             @Override
             public void onCheckedChanged(CompoundButton compoundButton, boolean checked) {
@@ -166,6 +175,7 @@ public class FragmentOptionsSend extends FragmentBase implements SharedPreferenc
         SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(getContext());
 
         swPrefixOnce.setChecked(prefs.getBoolean("prefix_once", false));
+        swPlainOnly.setChecked(prefs.getBoolean("plain_only", false));
 
         swAutoResize.setChecked(prefs.getBoolean("autoresize", true));
 

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

@@ -28,14 +28,25 @@
                 app:layout_constraintTop_toTopOf="parent"
                 app:switchPadding="12dp" />
 
+            <androidx.appcompat.widget.SwitchCompat
+                android:id="@+id/swPlainOnly"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:layout_marginTop="12dp"
+                android:text="@string/title_advanced_plain_only"
+                app:layout_constraintStart_toStartOf="parent"
+                app:layout_constraintTop_toBottomOf="@id/swPrefixOnce"
+                app:switchPadding="12dp" />
+
             <androidx.appcompat.widget.SwitchCompat
                 android:id="@+id/swAutoResize"
                 android:layout_width="match_parent"
                 android:layout_height="wrap_content"
                 android:layout_marginTop="12dp"
+                android:checked="true"
                 android:text="@string/title_advanced_autoresize"
                 app:layout_constraintStart_toStartOf="parent"
-                app:layout_constraintTop_toBottomOf="@id/swPrefixOnce"
+                app:layout_constraintTop_toBottomOf="@id/swPlainOnly"
                 app:switchPadding="12dp" />
 
             <Spinner
@@ -61,6 +72,7 @@
                 android:layout_width="match_parent"
                 android:layout_height="wrap_content"
                 android:layout_marginTop="12dp"
+                android:checked="true"
                 android:text="@string/title_advanced_autosend"
                 app:layout_constraintStart_toStartOf="parent"
                 app:layout_constraintTop_toBottomOf="@id/spAutoResize"

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

@@ -172,6 +172,7 @@
     <string name="title_advanced_sync_folders">Synchronize folder list</string>
 
     <string name="title_advanced_prefix_once">Prefix subject only once on replying or forwarding</string>
+    <string name="title_advanced_plain_only">Send plain text only by default</string>
     <string name="title_advanced_autoresize">Automatically resize attached and embedded images</string>
     <string name="title_advanced_resize_pixels">&lt; %1$d pixels</string>
     <string name="title_advanced_autosend">Confirm sending messages</string>