[evolution/gnome-3-30] I#198 - Convert UTC date in Inline (Outlook style) reply when set to

[Milan Crha <mcrha src gnome org>]

commit 3e84e93500429ae3d4db18dd51f03d9b090ba0df
Author: Milan Crha <mcrha redhat com>
Date:   Wed Oct 31 15:25:59 2018 +0100

    I#198 - Convert UTC date in Inline (Outlook style) reply when set to
    
    Closes https://gitlab.gnome.org/GNOME/evolution/issues/198

 src/em-format/e-mail-formatter-quote-headers.c | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)
---
diff --git a/src/em-format/e-mail-formatter-quote-headers.c b/src/em-format/e-mail-formatter-quote-headers.c
index 73d4e43516..4870523d97 100644
--- a/src/em-format/e-mail-formatter-quote-headers.c
+++ b/src/em-format/e-mail-formatter-quote-headers.c
@@ -200,6 +200,7 @@ emfqe_format_header (EMailFormatter *formatter,
        } else if (g_str_equal (canon_name, "Date") ||
                   g_str_equal (canon_name, "Resent-Date")) {
                CamelMedium *medium;
+               GSettings *settings;
 
                medium = CAMEL_MEDIUM (mime_part);
                txt = camel_medium_get_header (medium, canon_name);
@@ -208,6 +209,31 @@ emfqe_format_header (EMailFormatter *formatter,
 
                flags |= E_MAIL_FORMATTER_HEADER_FLAG_BOLD;
 
+               settings = e_util_ref_settings ("org.gnome.evolution.mail");
+               if (g_settings_get_boolean (settings, "composer-reply-credits-utc-to-localtime")) {
+                       time_t date;
+                       gint offset = 0;
+
+                       date = camel_header_decode_date (txt, &offset);
+                       if (date > 0 && !offset) {
+                               struct tm gmtm, lctm;
+                               time_t gmtt, lctt;
+
+                               gmtime_r (&date, &gmtm);
+                               localtime_r (&date, &lctm);
+
+                               gmtt = mktime (&gmtm);
+                               lctt = mktime (&lctm);
+
+                               offset = (lctt - gmtt) * 100 / 3600;
+
+                               value = camel_header_format_date (date, offset);
+
+                               if (value && *value)
+                                       txt = value;
+                       }
+               }
+               g_object_unref (settings);
        } else {
                CamelMedium *medium;