[evolution] I#1554 - Mail: Sort Status column by unread state first

[Milan Crha <mcrha src gnome org>]

commit 1d8347cbf6bd98049cd344bb171a9b7ce96a93a4
Author: Milan Crha <mcrha redhat com>
Date:   Wed Jul 7 18:00:46 2021 +0200

    I#1554 - Mail: Sort Status column by unread state first
    
    Closes https://gitlab.gnome.org/GNOME/evolution/-/issues/1554

 src/mail/message-list.c      | 31 ++++++++++++++++++++++++++-----
 src/mail/message-list.etspec |  2 +-
 2 files changed, 27 insertions(+), 6 deletions(-)
---
diff --git a/src/mail/message-list.c b/src/mail/message-list.c
index 990c5abbda..7d7588602c 100644
--- a/src/mail/message-list.c
+++ b/src/mail/message-list.c
@@ -317,8 +317,8 @@ static const gchar *status_map[] = {
        N_("Seen"),
        N_("Answered"),
        N_("Forwarded"),
-       N_("Multiple Unseen Messages"),
-       N_("Multiple Messages")
+       N_("Answered"), /* and unread */
+       N_("Forwarded") /* and unread */
 };
 
 static const gchar *status_icons[] = {
@@ -326,8 +326,8 @@ static const gchar *status_icons[] = {
        "mail-read",
        "mail-replied",
        "mail-forward",
-       "stock_mail-unread-multiple",
-       "stock_mail-open-multiple"
+       "mail-replied", /* and unread */
+       "mail-forward" /* and unread */
 };
 
 static const gchar *score_map[] = {
@@ -713,6 +713,22 @@ address_compare (gconstpointer address1,
        return retval;
 }
 
+static gint
+mail_status_compare (gconstpointer pstatus1,
+                    gconstpointer pstatus2,
+                    gpointer cmp_cache)
+{
+       gint status1 = GPOINTER_TO_INT (pstatus1);
+       gint status2 = GPOINTER_TO_INT (pstatus2);
+       gboolean is_unread1 = status1 == 0 || status1 == 4 || status1 == 5;
+       gboolean is_unread2 = status2 == 0 || status2 == 4 || status2 == 5;
+
+       if ((is_unread1 ? 1 : 0) == (is_unread2 ? 1 : 0))
+               return e_int_compare (pstatus1, pstatus2);
+
+       return is_unread1 ? -1 : 1;
+}
+
 static gchar *
 filter_size (gint size)
 {
@@ -1823,7 +1839,11 @@ ml_tree_value_at_ex (ETreeModel *etm,
        switch (col) {
        case COL_MESSAGE_STATUS:
                flags = camel_message_info_get_flags (msg_info);
-               if (flags & CAMEL_MESSAGE_ANSWERED)
+               if (!(flags & CAMEL_MESSAGE_SEEN) && (flags & CAMEL_MESSAGE_ANSWERED) != 0)
+                       return GINT_TO_POINTER (4);
+               else if (!(flags & CAMEL_MESSAGE_SEEN) && (flags & CAMEL_MESSAGE_FORWARDED) != 0)
+                       return GINT_TO_POINTER (5);
+               else if (flags & CAMEL_MESSAGE_ANSWERED)
                        return GINT_TO_POINTER (2);
                else if (flags & CAMEL_MESSAGE_FORWARDED)
                        return GINT_TO_POINTER (3);
@@ -2324,6 +2344,7 @@ message_list_create_extras (GSettings *mail_settings)
        e_table_extras_add_icon_name (extras, "followup", "stock_mail-flag-for-followup");
 
        e_table_extras_add_compare (extras, "address_compare", address_compare);
+       e_table_extras_add_compare (extras, "mail-status", mail_status_compare);
 
        cell = e_cell_toggle_new (status_icons, G_N_ELEMENTS (status_icons));
        e_cell_toggle_set_icon_descriptions (E_CELL_TOGGLE (cell), status_map, G_N_ELEMENTS (status_map));
diff --git a/src/mail/message-list.etspec b/src/mail/message-list.etspec
index bc19a00ed8..6a37104070 100644
--- a/src/mail/message-list.etspec
+++ b/src/mail/message-list.etspec
@@ -1,5 +1,5 @@
 <ETableSpecification cursor-mode="line" draw-grid="false" draw-focus="true" selection-mode="browse" 
allow-grouping="false">
-  <ETableColumn model_col="0" _title="Status" pixbuf="status" expansion="0.0" minimum_width="18" 
resizable="false" cell="render_message_status" compare="integer" />
+  <ETableColumn model_col="0" _title="Status" pixbuf="status" expansion="0.0" minimum_width="18" 
resizable="false" cell="render_message_status" compare="mail-status" />
 
   <ETableColumn model_col="1" _title="Flagged" pixbuf="flagged" expansion="0.0" minimum_width="18" 
resizable="false" cell="render_flagged" compare="integer"/>