Add Option for Simplified Layout

* the simplified layout omits the Nerdfonts characters that are not
  found in every Fontset

* add an optional config option to opt into the simplified ui
  `simplified_ui: bool`

* add a config flag that allows opting into the simplified ui
  `zellij options --simplified-ui`

* move the `clean` flag to the `setup` subcommand

3 files changed, 46 insertions, 20 deletions

diff --git a/default-plugins/tab-bar/src/line.rs b/default-plugins/tab-bar/src/line.rs
index 89a7aa1b..574edb78 100644
--- a/default-plugins/tab-bar/src/line.rs
+++ b/default-plugins/tab-bar/src/line.rs
@@ -48,7 +48,7 @@ fn populate_tabs_in_tab_line(
     }
 }
 
-fn left_more_message(tab_count_to_the_left: usize, palette: Palette) -> LinePart {
+fn left_more_message(tab_count_to_the_left: usize, palette: Palette, separator: &str) -> LinePart {
     if tab_count_to_the_left == 0 {
         return LinePart {
             part: String::new(),
@@ -62,11 +62,11 @@ fn left_more_message(tab_count_to_the_left: usize, palette: Palette) -> LinePart
     };
     // 238
     let more_text_len = more_text.chars().count() + 2; // 2 for the arrows
-    let left_separator = style!(palette.bg, palette.orange).paint(ARROW_SEPARATOR);
+    let left_separator = style!(palette.bg, palette.orange).paint(separator);
     let more_styled_text = style!(palette.black, palette.orange)
         .bold()
         .paint(more_text);
-    let right_separator = style!(palette.orange, palette.bg).paint(ARROW_SEPARATOR);
+    let right_separator = style!(palette.orange, palette.bg).paint(separator);
     let more_styled_text = format!(
         "{}",
         ANSIStrings(&[left_separator, more_styled_text, right_separator,])
@@ -77,7 +77,11 @@ fn left_more_message(tab_count_to_the_left: usize, palette: Palette) -> LinePart
     }
 }
 
-fn right_more_message(tab_count_to_the_right: usize, palette: Palette) -> LinePart {
+fn right_more_message(
+    tab_count_to_the_right: usize,
+    palette: Palette,
+    separator: &str,
+) -> LinePart {
     if tab_count_to_the_right == 0 {
         return LinePart {
             part: String::new(),
@@ -90,11 +94,11 @@ fn right_more_message(tab_count_to_the_right: usize, palette: Palette) -> LinePa
         " +many → ".to_string()
     };
     let more_text_len = more_text.chars().count() + 1; // 2 for the arrow
-    let left_separator = style!(palette.bg, palette.orange).paint(ARROW_SEPARATOR);
+    let left_separator = style!(palette.bg, palette.orange).paint(separator);
     let more_styled_text = style!(palette.black, palette.orange)
         .bold()
         .paint(more_text);
-    let right_separator = style!(palette.orange, palette.bg).paint(ARROW_SEPARATOR);
+    let right_separator = style!(palette.orange, palette.bg).paint(separator);
     let more_styled_text = format!(
         "{}",
         ANSIStrings(&[left_separator, more_styled_text, right_separator,])
@@ -111,14 +115,15 @@ fn add_previous_tabs_msg(
     title_bar: &mut Vec<LinePart>,
     cols: usize,
     palette: Palette,
+    separator: &str,
 ) {
     while get_current_title_len(&tabs_to_render)
-        + left_more_message(tabs_before_active.len(), palette).len
+        + left_more_message(tabs_before_active.len(), palette, separator).len
         >= cols
     {
         tabs_before_active.push(tabs_to_render.remove(0));
     }
-    let left_more_message = left_more_message(tabs_before_active.len(), palette);
+    let left_more_message = left_more_message(tabs_before_active.len(), palette, separator);
     title_bar.push(left_more_message);
 }
 
@@ -127,14 +132,15 @@ fn add_next_tabs_msg(
     title_bar: &mut Vec<LinePart>,
     cols: usize,
     palette: Palette,
+    separator: &str,
 ) {
     while get_current_title_len(&title_bar)
-        + right_more_message(tabs_after_active.len(), palette).len
+        + right_more_message(tabs_after_active.len(), palette, separator).len
         >= cols
     {
         tabs_after_active.insert(0, title_bar.pop().unwrap());
     }
-    let right_more_message = right_more_message(tabs_after_active.len(), palette);
+    let right_more_message = right_more_message(tabs_after_active.len(), palette, separator);
     title_bar.push(right_more_message);
 }
 
@@ -148,11 +154,20 @@ fn tab_line_prefix(palette: Palette) -> LinePart {
     }
 }
 
+pub fn tab_separator(capabilities: PluginCapabilities) -> &'static str {
+    if !capabilities.arrow_fonts {
+        ARROW_SEPARATOR
+    } else {
+        &""
+    }
+}
+
 pub fn tab_line(
     mut all_tabs: Vec<LinePart>,
     active_tab_index: usize,
     cols: usize,
     palette: Palette,
+    capabilities: PluginCapabilities,
 ) -> Vec<LinePart> {
     let mut tabs_to_render: Vec<LinePart> = vec![];
     let mut tabs_after_active = all_tabs.split_off(active_tab_index);
@@ -180,6 +195,7 @@ pub fn tab_line(
             &mut tab_line,
             cols - prefix.len,
             palette,
+            tab_separator(capabilities),
         );
     }
     tab_line.append(&mut tabs_to_render);
@@ -189,6 +205,7 @@ pub fn tab_line(
             &mut tab_line,
             cols - prefix.len,
             palette,
+            tab_separator(capabilities),
         );
     }
     tab_line.insert(0, prefix);
diff --git a/default-plugins/tab-bar/src/main.rs b/default-plugins/tab-bar/src/main.rs
index c6277013..00ff4bd9 100644
--- a/default-plugins/tab-bar/src/main.rs
+++ b/default-plugins/tab-bar/src/main.rs
@@ -60,10 +60,17 @@ impl ZellijPlugin for State {
                 t.position,
                 t.is_sync_panes_active,
                 self.mode_info.palette,
+                self.mode_info.capabilities,
             );
             all_tabs.push(tab);
         }
-        let tab_line = tab_line(all_tabs, active_tab_index, cols, self.mode_info.palette);
+        let tab_line = tab_line(
+            all_tabs,
+            active_tab_index,
+            cols,
+            self.mode_info.palette,
+            self.mode_info.capabilities,
+        );
         let mut s = String::new();
         for bar_part in tab_line {
             s = format!("{}{}", s, bar_part.part);
diff --git a/default-plugins/tab-bar/src/tab.rs b/default-plugins/tab-bar/src/tab.rs
index 7c1fe6b3..85e2c378 100644
--- a/default-plugins/tab-bar/src/tab.rs
+++ b/default-plugins/tab-bar/src/tab.rs
@@ -1,15 +1,15 @@
-use crate::{LinePart, ARROW_SEPARATOR};
+use crate::{line::tab_separator, LinePart};
 use ansi_term::ANSIStrings;
 use zellij_tile::prelude::*;
 use zellij_tile_utils::style;
 
-pub fn active_tab(text: String, palette: Palette) -> LinePart {
-    let left_separator = style!(palette.bg, palette.green).paint(ARROW_SEPARATOR);
+pub fn active_tab(text: String, palette: Palette, separator: &str) -> LinePart {
+    let left_separator = style!(palette.bg, palette.green).paint(separator);
     let tab_text_len = text.chars().count() + 4; // 2 for left and right separators, 2 for the text padding
     let tab_styled_text = style!(palette.black, palette.green)
         .bold()
         .paint(format!(" {} ", text));
-    let right_separator = style!(palette.green, palette.bg).paint(ARROW_SEPARATOR);
+    let right_separator = style!(palette.green, palette.bg).paint(separator);
     let tab_styled_text = format!(
         "{}",
         ANSIStrings(&[left_separator, tab_styled_text, right_separator,])
@@ -20,13 +20,13 @@ pub fn active_tab(text: String, palette: Palette) -> LinePart {
     }
 }
 
-pub fn non_active_tab(text: String, palette: Palette) -> LinePart {
-    let left_separator = style!(palette.bg, palette.fg).paint(ARROW_SEPARATOR);
+pub fn non_active_tab(text: String, palette: Palette, separator: &str) -> LinePart {
+    let left_separator = style!(palette.bg, palette.fg).paint(separator);
     let tab_text_len = text.chars().count() + 4; // 2 for left and right separators, 2 for the padding
     let tab_styled_text = style!(palette.black, palette.fg)
         .bold()
         .paint(format!(" {} ", text));
-    let right_separator = style!(palette.fg, palette.bg).paint(ARROW_SEPARATOR);
+    let right_separator = style!(palette.fg, palette.bg).paint(separator);
     let tab_styled_text = format!(
         "{}",
         ANSIStrings(&[left_separator, tab_styled_text, right_separator,])
@@ -43,7 +43,9 @@ pub fn tab_style(
     position: usize,
     is_sync_panes_active: bool,
     palette: Palette,
+    capabilities: PluginCapabilities,
 ) -> LinePart {
+    let separator = tab_separator(capabilities);
     let mut tab_text = if text.is_empty() {
         format!("Tab #{}", position + 1)
     } else {
@@ -53,8 +55,8 @@ pub fn tab_style(
         tab_text.push_str(" (Sync)");
     }
     if is_active_tab {
-        active_tab(tab_text, palette)
+        active_tab(tab_text, palette, separator)
     } else {
-        non_active_tab(tab_text, palette)
+        non_active_tab(tab_text, palette, separator)
     }
 }