[evolution] Mail: Handle CAMEL_PROVIDER_CONF_ADVANCED_SECTION_START in provider config page

[Milan Crha <mcrha src gnome org>]

commit 76a5dd93dbc28271b00e5036331852ebb3408f2c
Author: Milan Crha <mcrha redhat com>
Date:   Tue Jun 28 15:18:26 2022 +0200

    Mail: Handle CAMEL_PROVIDER_CONF_ADVANCED_SECTION_START in provider config page
    
    Show it as an expandable part, which is collapsed by default.

 src/mail/e-mail-config-provider-page.c | 70 +++++++++++++++++++++++++++++++++-
 1 file changed, 69 insertions(+), 1 deletion(-)
---
diff --git a/src/mail/e-mail-config-provider-page.c b/src/mail/e-mail-config-provider-page.c
index bcb9cd0ee8..497d5fb6d2 100644
--- a/src/mail/e-mail-config-provider-page.c
+++ b/src/mail/e-mail-config-provider-page.c
@@ -470,6 +470,55 @@ mail_config_provider_page_add_placeholder (GtkBox *main_box,
        mail_config_provider_page_handle_dependency (settings, entry, hbox);
 }
 
+static GtkBox *
+mail_config_provider_page_add_advanced_section (GtkBox *main_box,
+                                               CamelSettings *settings,
+                                               CamelProviderConfEntry *entry)
+{
+       GtkWidget *vbox, *expander, *widget;
+       const gchar *label;
+
+       vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 0);
+       gtk_box_set_spacing (GTK_BOX (vbox), 6);
+       gtk_widget_set_margin_left (vbox, STANDARD_MARGIN);
+       gtk_widget_show (vbox);
+
+       label = entry->text;
+
+       if (!label || !*label)
+               label = _("Advanced Options");
+
+       expander = gtk_expander_new_with_mnemonic (label);
+       widget = gtk_expander_get_label_widget (GTK_EXPANDER (expander));
+       if (widget) {
+               PangoAttrList *bold;
+
+               bold = pango_attr_list_new ();
+               pango_attr_list_insert (bold, pango_attr_weight_new (PANGO_WEIGHT_BOLD));
+
+               gtk_label_set_attributes (GTK_LABEL (widget), bold);
+
+               pango_attr_list_unref (bold);
+       }
+       gtk_expander_set_expanded (GTK_EXPANDER (expander), FALSE);
+
+       gtk_widget_show (expander);
+
+       gtk_box_pack_start (main_box, expander, FALSE, FALSE, 0);
+       gtk_box_pack_start (main_box, vbox, FALSE, FALSE, 0);
+
+       /* Because some themes can show the box in different style than the rest of the options */
+       e_binding_bind_property (
+               expander, "expanded",
+               vbox, "visible",
+               G_BINDING_SYNC_CREATE);
+
+       mail_config_provider_page_handle_dependency (settings, entry, expander);
+       mail_config_provider_page_handle_dependency (settings, entry, vbox);
+
+       return GTK_BOX (vbox);
+}
+
 void
 e_mail_config_provider_add_widgets (CamelProvider *provider,
                                    CamelSettings *settings,
@@ -477,6 +526,7 @@ e_mail_config_provider_add_widgets (CamelProvider *provider,
                                    gboolean skip_first_section_name)
 {
        CamelProviderConfEntry *entries;
+       GSList *section_boxes = NULL; /* GtkBox * */
        gboolean first_section = skip_first_section_name;
        gint ii;
 
@@ -495,7 +545,7 @@ e_mail_config_provider_add_widgets (CamelProvider *provider,
        for (ii = 0; entries[ii].type != CAMEL_PROVIDER_CONF_END; ii++) {
 
                /* Skip entries with no name. */
-               if (entries[ii].name == NULL)
+               if (entries[ii].name == NULL && entries[ii].type != 
CAMEL_PROVIDER_CONF_ADVANCED_SECTION_START)
                        continue;
 
                switch (entries[ii].type) {
@@ -505,6 +555,7 @@ e_mail_config_provider_add_widgets (CamelProvider *provider,
                                        first_section = FALSE;
                                        continue;
                                }
+                               section_boxes = g_slist_prepend (section_boxes, main_box);
                                mail_config_provider_page_add_section (
                                        main_box, provider, &entries[ii], skip_first_section_name);
                                break;
@@ -539,10 +590,27 @@ e_mail_config_provider_add_widgets (CamelProvider *provider,
                                        main_box, settings, &entries[ii]);
                                break;
 
+                       case CAMEL_PROVIDER_CONF_ADVANCED_SECTION_START:
+                               first_section = FALSE;
+
+                               section_boxes = g_slist_prepend (section_boxes, main_box);
+
+                               main_box = mail_config_provider_page_add_advanced_section (
+                                       main_box, settings, &entries[ii]);
+                               break;
+
+                       case CAMEL_PROVIDER_CONF_SECTION_END:
+                               if (section_boxes) {
+                                       main_box = section_boxes->data;
+                                       section_boxes = g_slist_remove (section_boxes, main_box);
+                               }
+                               break;
                        default:
                                break;  /* skip it */
                }
        }
+
+       g_slist_free (section_boxes);
 }
 
 static void