Composer: long press to set hide/show attachments default

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

@@ -1525,6 +1525,7 @@ public class FragmentCompose extends FragmentBase {
 
         ownerAttachment = new TwoStateOwner(getViewLifecycleOwner(), "attachments");
         ownerAttachment.start();
+        ibExpanderAttachments.setTag(prefs.getBoolean("compose_hide_attachments", false));
         ibExpanderAttachments.setVisibility(View.GONE);
         ibExpanderAttachments.setOnClickListener(new View.OnClickListener() {
             @Override
@@ -1535,6 +1536,17 @@ public class FragmentCompose extends FragmentBase {
                 ownerAttachment.restart();
             }
         });
+        ibExpanderAttachments.setOnLongClickListener(new View.OnLongClickListener() {
+            @Override
+            public boolean onLongClick(View v) {
+                boolean hide_attachments = !Boolean.TRUE.equals(ibExpanderAttachments.getTag());
+                ibExpanderAttachments.setTag(hide_attachments);
+                ibExpanderAttachments.setImageLevel(hide_attachments ? 1 /* more */ : 0 /* less */);
+                ownerAttachment.restart();
+                prefs.edit().putBoolean("compose_hide_attachments", hide_attachments).apply();
+                return true;
+            }
+        });
 
         tvAttachments.setVisibility(View.GONE);
 

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

@@ -348,7 +348,8 @@ public class FragmentOptionsMisc extends FragmentBase implements SharedPreferenc
             "last_update_check", "last_announcement_check",
             "motd",
             "outlook_last_checked", "outlook_checked",
-            "send_archive"
+            "send_archive",
+            "compose_hide_attachments"
     };
 
     @Override