Allow configuration of the sidebar divider

This adds the config option listing.sidebar_divider to set the character
used to show the divider (defaults to ' ') along with the corresponding
theme in mail.sidebar_divider which defaults to the default theme.

docs/meli-themes.5

@@ -193,6 +193,8 @@ widgets.options.highlighted
 .It
 mail.sidebar
 .It
+mail.sidebar_divider
+.It
 mail.sidebar_unread_count
 .It
 mail.sidebar_index

docs/meli.conf.5

@@ -840,6 +840,9 @@ Sets the string to print in the mailbox tree for a leaf level where its root has
 .It Ic sidebar_mailbox_tree_no_sibling_leaf Ar String
 .Pq Em optional
 Sets the string to print in the mailbox tree for a leaf level where its root has no sibling.
+.It Ic sidebar_divider Ar char
+.Pq Em optional
+Sets the character to print as the divider between the accounts list and the message list.
 .El
 .Ss Examples of sidebar mailbox tree customization
 The default values

src/components/contacts/contact_list.rs

@@ -54,7 +54,10 @@ pub struct ContactList {
 
     mode: ViewMode,
     dirty: bool,
-    show_divider: bool,
+
+    sidebar_divider: char,
+    sidebar_divider_theme: ThemeAttribute,
+
     menu_visibility: bool,
     movement: Option<PageMovement>,
     cmd_buf: String,
@@ -98,7 +101,8 @@ impl ContactList {
             cmd_buf: String::with_capacity(8),
             view: None,
             ratio: 90,
-            show_divider: false,
+            sidebar_divider: context.settings.listing.sidebar_divider,
+            sidebar_divider_theme: conf::value(context, "mail.sidebar_divider"),
             menu_visibility: true,
             id: ComponentId::new_v4(),
         }
@@ -239,13 +243,11 @@ impl ContactList {
         change_colors(grid, area, fg_color, bg_color);
     }
 
-    fn draw_menu(&mut self, grid: &mut CellBuffer, mut area: Area, context: &mut Context) {
+    fn draw_menu(&mut self, grid: &mut CellBuffer, area: Area, context: &mut Context) {
         if !self.is_dirty() {
             return;
         }
         clear_area(grid, area, self.theme_default);
-        /* visually divide menu and listing */
-        area = (area.0, pos_dec(area.1, (1, 0)));
         let upper_left = upper_left!(area);
         let bottom_right = bottom_right!(area);
         self.dirty = false;
@@ -580,19 +582,12 @@ impl Component for ContactList {
         };
         let mid = get_x(bottom_right) - right_component_width;
         if self.dirty && mid != get_x(upper_left) {
-            if self.show_divider {
-                for i in get_y(upper_left)..=get_y(bottom_right) {
-                    grid[(mid, i)]
-                        .set_ch(VERT_BOUNDARY)
-                        .set_fg(self.theme_default.fg)
-                        .set_bg(self.theme_default.bg);
-                }
-            } else {
-                for i in get_y(upper_left)..=get_y(bottom_right) {
-                    grid[(mid, i)]
-                        .set_fg(self.theme_default.fg)
-                        .set_bg(self.theme_default.bg);
-                }
+            for i in get_y(upper_left)..=get_y(bottom_right) {
+                grid[(mid, i)]
+                    .set_ch(self.sidebar_divider)
+                    .set_fg(self.sidebar_divider_theme.fg)
+                    .set_bg(self.sidebar_divider_theme.bg)
+                    .set_attrs(self.sidebar_divider_theme.attrs);
             }
             context
                 .dirty_areas
@@ -604,7 +599,11 @@ impl Component for ContactList {
         } else if right_component_width == 0 {
             self.draw_menu(grid, area, context);
         } else {
-            self.draw_menu(grid, (upper_left, (mid, get_y(bottom_right))), context);
+            self.draw_menu(
+                grid,
+                (upper_left, (mid.saturating_sub(1), get_y(bottom_right))),
+                context,
+            );
             self.draw_list(grid, (set_x(upper_left, mid + 1), bottom_right), context);
         }
         self.dirty = false;

src/components/mail/listing.rs

@@ -481,7 +481,9 @@ pub struct Listing {
     id: ComponentId,
     theme_default: ThemeAttribute,
 
-    show_divider: bool,
+    sidebar_divider: char,
+    sidebar_divider_theme: ThemeAttribute,
+
     menu_visibility: bool,
     cmd_buf: String,
     /// This is the width of the right container to the entire width.
@@ -539,21 +541,12 @@ impl Component for Listing {
         };
         let mid = get_x(bottom_right) - right_component_width;
         if self.dirty && mid != get_x(upper_left) {
-            if self.show_divider {
-                for i in get_y(upper_left)..=get_y(bottom_right) {
-                    grid[(mid, i)]
-                        .set_ch(VERT_BOUNDARY)
-                        .set_fg(self.theme_default.fg)
-                        .set_bg(self.theme_default.bg)
-                        .set_attrs(self.theme_default.attrs);
-                }
-            } else {
-                for i in get_y(upper_left)..=get_y(bottom_right) {
-                    grid[(mid, i)]
-                        .set_fg(self.theme_default.fg)
-                        .set_bg(self.theme_default.bg)
-                        .set_attrs(self.theme_default.attrs);
-                }
+            for i in get_y(upper_left)..=get_y(bottom_right) {
+                grid[(mid, i)]
+                    .set_ch(self.sidebar_divider)
+                    .set_fg(self.sidebar_divider_theme.fg)
+                    .set_bg(self.sidebar_divider_theme.bg)
+                    .set_attrs(self.sidebar_divider_theme.attrs);
             }
             context
                 .dirty_areas
@@ -579,7 +572,11 @@ impl Component for Listing {
         } else if right_component_width == 0 {
             self.draw_menu(grid, area, context);
         } else {
-            self.draw_menu(grid, (upper_left, (mid, get_y(bottom_right))), context);
+            self.draw_menu(
+                grid,
+                (upper_left, (mid.saturating_sub(1), get_y(bottom_right))),
+                context,
+            );
             if context.is_online(account_hash).is_err() {
                 match self.component {
                     ListingComponent::Offline(_) => {}
@@ -1435,8 +1432,9 @@ impl Listing {
                 }
             })
             .collect();
+        let first_account_hash = account_entries[0].hash;
         let mut ret = Listing {
-            component: Offline(OfflineListing::new((account_entries[0].hash, 0))),
+            component: Offline(OfflineListing::new((first_account_hash, 0))),
             accounts: account_entries,
             status: None,
             visible: true,
@@ -1446,7 +1444,10 @@ impl Listing {
             startup_checks_rate: RateLimit::new(2, 1000, context.job_executor.clone()),
             theme_default: conf::value(context, "theme_default"),
             id: ComponentId::new_v4(),
-            show_divider: false,
+            sidebar_divider: *account_settings!(
+                context[first_account_hash].listing.sidebar_divider
+            ),
+            sidebar_divider_theme: conf::value(context, "mail.sidebar_divider"),
             menu_visibility: true,
             ratio: 90,
             menu_width: WidgetWidth::Unset,
@@ -1457,13 +1458,11 @@ impl Listing {
         ret
     }
 
-    fn draw_menu(&mut self, grid: &mut CellBuffer, mut area: Area, context: &mut Context) {
+    fn draw_menu(&mut self, grid: &mut CellBuffer, area: Area, context: &mut Context) {
         if !self.is_dirty() {
             return;
         }
         clear_area(grid, area, self.theme_default);
-        /* visually divide menu and listing */
-        area = (area.0, pos_dec(area.1, (1, 0)));
         let upper_left = upper_left!(area);
         let bottom_right = bottom_right!(area);
         self.dirty = false;
@@ -1770,6 +1769,7 @@ impl Listing {
             /* Set to dummy */
             self.component = Offline(OfflineListing::new((account_hash, 0)));
         }
+        self.sidebar_divider = *account_settings!(context[account_hash].listing.sidebar_divider);
         self.status = None;
         self.set_dirty(true);
         context

src/conf.rs

@@ -836,6 +836,7 @@ mod dotaddressable {
     impl DotAddressable for bool {}
 
     impl DotAddressable for String {}
+    impl DotAddressable for char {}
     impl DotAddressable for IndexStyle {}
     impl DotAddressable for u64 {}
     impl DotAddressable for crate::terminal::Color {}

src/conf/listing.rs

@@ -90,6 +90,14 @@ pub struct ListingSettings {
     ///Default: " "
     #[serde(default)]
     pub sidebar_mailbox_tree_no_sibling_leaf: Option<String>,
+
+    ///Default: ' '
+    #[serde(default = "default_divider")]
+    pub sidebar_divider: char,
+}
+
+const fn default_divider() -> char {
+    ' '
 }
 
 impl Default for ListingSettings {
@@ -104,6 +112,7 @@ impl Default for ListingSettings {
             sidebar_mailbox_tree_no_sibling: None,
             sidebar_mailbox_tree_has_sibling_leaf: None,
             sidebar_mailbox_tree_no_sibling_leaf: None,
+            sidebar_divider: default_divider(),
         }
     }
 }
@@ -131,6 +140,7 @@ impl DotAddressable for ListingSettings {
                     "sidebar_mailbox_tree_no_sibling_leaf" => self
                         .sidebar_mailbox_tree_no_sibling_leaf
                         .lookup(field, tail),
+                    "sidebar_divider" => self.sidebar_divider.lookup(field, tail),
                     other => Err(MeliError::new(format!(
                         "{} has no field named {}",
                         parent_field, other

src/conf/overrides.rs

@@ -131,6 +131,9 @@ pub struct ListingSettingsOverride {
     #[doc = "Default: \" \""]
     #[serde(default)]
     pub sidebar_mailbox_tree_no_sibling_leaf: Option<Option<String>>,
+    #[doc = "Default: ' '"]
+    #[serde(default)]
+    pub sidebar_divider: Option<char>,
 }
 impl Default for ListingSettingsOverride {
     fn default() -> Self {
@@ -144,6 +147,7 @@ impl Default for ListingSettingsOverride {
             sidebar_mailbox_tree_no_sibling: None,
             sidebar_mailbox_tree_has_sibling_leaf: None,
             sidebar_mailbox_tree_no_sibling_leaf: None,
+            sidebar_divider: None,
         }
     }
 }

src/conf/themes.rs

@@ -255,6 +255,7 @@ const DEFAULT_KEYS: &[&str] = &[
     "widgets.form.highlighted",
     "widgets.options.highlighted",
     "mail.sidebar",
+    "mail.sidebar_divider",
     "mail.sidebar_account_name",
     "mail.sidebar_unread_count",
     "mail.sidebar_index",
@@ -1334,6 +1335,7 @@ impl Default for Themes {
         /* Mail Sidebar */
 
         add!("mail.sidebar");
+        add!("mail.sidebar_divider");
         add!(
             "mail.sidebar_account_name",
             dark = {