Complete chain of received headers

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

@@ -118,7 +118,8 @@ public class ActivityDSN extends ActivityBase {
                         bos.write(buffer, 0, length);
 
                     String headers = MessageHelper.decodeMime(bos.toString(StandardCharsets.UTF_8.name()));
-                    result.headers = HtmlHelper.highlightHeaders(context, null, headers, false);
+                    result.headers = HtmlHelper.highlightHeaders(context,
+                            null, null, null, headers, false);
                 }
 
                 return result;

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

@@ -323,7 +323,8 @@ public class ActivityEML extends ActivityBase {
                     MessageHelper.getStructure(imessage, ssb, 0, textColorLink);
                     result.structure = ssb;
 
-                    result.headers = HtmlHelper.highlightHeaders(context, helper.getFrom(), helper.getHeaders(), false);
+                    result.headers = HtmlHelper.highlightHeaders(context,
+                            helper.getFrom(), helper.getTo(), helper.getReceivedHeader(), helper.getHeaders(), false);
 
                     return result;
                 }

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

@@ -2756,7 +2756,8 @@ public class AdapterMessage extends RecyclerView.Adapter<AdapterMessage.ViewHold
 
             if (show_headers && message.headers != null) {
                 Spanned headers = HtmlHelper.highlightHeaders(context,
-                        message.from, message.headers, message.blocklist != null && message.blocklist);
+                        message.from, message.to, message.received, message.headers,
+                        message.blocklist != null && message.blocklist);
                 if (BuildConfig.DEBUG && headers instanceof SpannableStringBuilder) {
                     SpannableStringBuilder ssb = (SpannableStringBuilder) headers;
                     ssb.append('\n')

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

@@ -2299,11 +2299,16 @@ public class Helper {
     }
 
     static String formatDuration(long ms) {
+        int sign = (ms < 0 ? -1 : 1);
+        ms = Math.abs(ms);
         int days = (int) (ms / (24 * 3600 * 1000L));
         ms = ms % (24 * 3600 * 1000L);
         long seconds = ms / 1000;
         ms = ms % 1000;
-        return (days > 0 ? days + " " : "") + DateUtils.formatElapsedTime(seconds) + "." + ms;
+        return (sign < 0 ? "-" : "") +
+                (days > 0 ? days + " " : "") +
+                DateUtils.formatElapsedTime(seconds) +
+                (ms == 0 ? "" : ". " + ms);
     }
 
     static String formatNumber(Integer number, long max, NumberFormat nf) {

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

@@ -2936,7 +2936,7 @@ public class HtmlHelper {
         return ssb.toString();
     }
 
-    static Spanned highlightHeaders(Context context, Address[] from, String headers, boolean blocklist) {
+    static Spanned highlightHeaders(Context context, Address[] from, Address[] to, Long r, String headers, boolean blocklist) {
         SpannableStringBuilder ssb = new SpannableStringBuilderEx(headers.replaceAll("\\t", " "));
         int textColorLink = Helper.resolveColor(context, android.R.attr.textColorLink);
         int colorVerified = Helper.resolveColor(context, R.attr.colorVerified);
@@ -2969,23 +2969,23 @@ public class HtmlHelper {
                 Log.w(ex);
             }
 
-            if (tx != null) {
-                ssb.append('\n');
-                int s = ssb.length();
-                ssb.append("\n#0 ").append(DTF.format(tx));
-                ssb.setSpan(new StyleSpan(Typeface.BOLD), s, ssb.length(), 0);
-
-                if (from != null) {
-                    ssb.append('\n');
-                    s = ssb.length();
-                    ssb.append("from");
-                    ssb.setSpan(new ForegroundColorSpan(textColorLink), s, ssb.length(), 0);
-                    ssb.append(' ').append(MessageHelper.formatAddresses(from, true, false));
-                }
+            int s = ssb.length();
+            ssb.append("\n#0 ");
+            if (tx != null)
+                ssb.append(DTF.format(tx));
+            ssb.setSpan(new StyleSpan(Typeface.BOLD), s, ssb.length(), 0);
 
+            if (from != null) {
                 ssb.append('\n');
+                s = ssb.length();
+                ssb.append("from");
+                ssb.setSpan(new ForegroundColorSpan(textColorLink), s, ssb.length(), 0);
+                ssb.append(' ').append(MessageHelper.formatAddresses(from, true, false));
             }
 
+            ssb.append('\n');
+
+            Date rx = null;
             String[] received = iheaders.getHeader("Received");
             if (received != null && received.length > 0) {
                 for (int i = received.length - 1; i >= 0; i--) {
@@ -2993,20 +2993,18 @@ public class HtmlHelper {
                     String h = MimeUtility.unfold(received[i]);
 
                     int semi = h.lastIndexOf(';');
-                    Date rx = null;
                     if (semi > 0) {
                         rx = mdf.parse(h, new ParsePosition(semi + 1));
                         h = h.substring(0, semi);
                     }
 
-                    int s = ssb.length();
+                    s = ssb.length();
                     ssb.append('#').append(Integer.toString(received.length - i));
                     if (rx != null) {
                         ssb.append(' ').append(DTF.format(rx));
-                        if (tx != null) {
-                            long ms = rx.getTime() - tx.getTime();
-                            ssb.append(" \u0394").append(DateUtils.formatElapsedTime(ms / 1000));
-                        }
+                        if (tx != null)
+                            ssb.append(" \u0394")
+                                    .append(Helper.formatDuration(rx.getTime() - tx.getTime()));
                     }
                     ssb.setSpan(new StyleSpan(Typeface.BOLD), s, ssb.length(), 0);
 
@@ -3065,6 +3063,26 @@ public class HtmlHelper {
                     ssb.append("\n");
                 }
             }
+
+            s = ssb.length();
+            ssb.append("\n#").append(Integer.toString(received == null ? 1 : received.length + 1));
+            if (r != null) {
+                ssb.append(' ').append(DTF.format(r));
+                if (rx != null)
+                    ssb.append(" \u0394")
+                            .append(Helper.formatDuration(r - rx.getTime()));
+            }
+            ssb.setSpan(new StyleSpan(Typeface.BOLD), s, ssb.length(), 0);
+
+            if (to != null) {
+                ssb.append('\n');
+                s = ssb.length();
+                ssb.append("to");
+                ssb.setSpan(new ForegroundColorSpan(textColorLink), s, ssb.length(), 0);
+                ssb.append(' ').append(MessageHelper.formatAddresses(to, true, false));
+            }
+
+            ssb.append('\n');
         } catch (Throwable ex) {
             Log.w(ex);
         }