Refactoring

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

@@ -936,6 +936,27 @@ public class HtmlHelper {
         return false;
     }
 
+    // https://tools.ietf.org/html/rfc3676
+    static String flow(String text) {
+        boolean continuation = false;
+        StringBuilder flowed = new StringBuilder();
+        for (String line : text.split("\\r?\\n")) {
+            if (continuation)
+                while (line.startsWith(">")) {
+                    line = line.substring(1);
+                    if (line.startsWith(" "))
+                        line = line.substring(1);
+                }
+
+            continuation = (line.endsWith(" ") && !"-- ".equals(line));
+
+            flowed.append(line);
+            if (!continuation)
+                flowed.append("\r\n");
+        }
+        return flowed.toString();
+    }
+
     static String formatPre(String text) {
         int level = 0;
         StringBuilder sb = new StringBuilder();

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

@@ -1481,26 +1481,8 @@ public class MessageHelper {
                     warnings.add(context.getString(R.string.title_no_charset, charset));
 
                 if (part.isMimeType("text/plain")) {
-                    // https://tools.ietf.org/html/rfc3676
-                    if ("flowed".equalsIgnoreCase(ct.getParameter("format"))) {
-                        boolean continuation = false;
-                        StringBuilder flowed = new StringBuilder();
-                        for (String line : result.split("\\r?\\n")) {
-                            if (continuation)
-                                while (line.startsWith(">")) {
-                                    line = line.substring(1);
-                                    if (line.startsWith(" "))
-                                        line = line.substring(1);
-                                }
-
-                            continuation = (line.endsWith(" ") && !"-- ".equals(line));
-
-                            flowed.append(line);
-                            if (!continuation)
-                                flowed.append("\r\n");
-                        }
-                        result = flowed.toString();
-                    }
+                    if ("flowed".equalsIgnoreCase(ct.getParameter("format")))
+                        result = HtmlHelper.flow(result);
                     result = "<div>" + HtmlHelper.formatPre(result) + "</div>";
                 } else if (part.isMimeType("text/html")) {
                     if (TextUtils.isEmpty(charset)) {