Signature fixes

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

@@ -315,9 +315,14 @@ public class FragmentIdentity extends FragmentBase {
 
             @Override
             public void afterTextChanged(Editable s) {
-                if (etSignature.getTag() == null)
-                    signature = HtmlHelper.toHtml(s);
-                else
+                if (etSignature.getTag() == null) {
+                    if (TextUtils.isEmpty(s))
+                        signature = null;
+                    else {
+                        Helper.clearComposingText(s);
+                        signature = HtmlHelper.toHtml(s);
+                    }
+                } else
                     etSignature.setTag(null);
             }
         });

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

@@ -32,6 +32,8 @@ import android.graphics.BitmapFactory;
 import android.net.Uri;
 import android.os.Bundle;
 import android.os.Parcel;
+import android.text.Spannable;
+import android.text.Spanned;
 import android.text.format.DateUtils;
 import android.text.format.Time;
 import android.view.Menu;
@@ -325,6 +327,13 @@ public class Helper {
         return text.substring(0, maxLen) + "...";
     }
 
+    static void clearComposingText(Spannable text) {
+        Object[] spans = text.getSpans(0, text.length(), Object.class);
+        for (Object span : spans)
+            if ((text.getSpanFlags(span) & Spanned.SPAN_COMPOSING) != 0)
+                text.removeSpan(span);
+    }
+
     static String localizeFolderName(Context context, String name) {
         if (name != null && "INBOX".equals(name.toUpperCase()))
             return context.getString(R.string.title_folder_inbox);

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

@@ -239,8 +239,8 @@
                 android:layout_marginTop="6dp"
                 android:layout_marginEnd="6dp"
                 android:fontFamily="monospace"
+                android:text="Signature"
                 android:textAppearance="@style/TextAppearance.AppCompat.Small"
-                android:textStyle="italic"
                 app:layout_constraintStart_toStartOf="parent"
                 app:layout_constraintTop_toBottomOf="@id/vSeparatorBody" />