feat(ui): round frame corners (#1227)

* feat(ui): round frame corners

* Allow rounded_corners to be set without a palette

* Revert "Allow rounded_corners to be set without a palette"

This reverts commit 9271a4b5452f2e59e0ebd55136343f0fbfabaa13.

* fix(style): remove redundant code

* fix(style): clippy lints that somehow got missed

* feat(config): add ui config section

26 files changed, 249 insertions, 193 deletions

diff --git a/default-plugins/status-bar/src/first_line.rs b/default-plugins/status-bar/src/first_line.rs
index ed67e5cc5..7ca0b0fb6 100644
--- a/default-plugins/status-bar/src/first_line.rs
+++ b/default-plugins/status-bar/src/first_line.rs
@@ -247,7 +247,7 @@ pub fn superkey(palette: ColoredElements, separator: &str) -> LinePart {
 }
 
 pub fn ctrl_keys(help: &ModeInfo, max_len: usize, separator: &str) -> LinePart {
-    let colored_elements = color_elements(help.palette);
+    let colored_elements = color_elements(help.style.colors);
     match &help.mode {
         InputMode::Locked => key_indicators(
             max_len,
diff --git a/default-plugins/status-bar/src/main.rs b/default-plugins/status-bar/src/main.rs
index daeb30f13..471c45c76 100644
--- a/default-plugins/status-bar/src/main.rs
+++ b/default-plugins/status-bar/src/main.rs
@@ -175,10 +175,10 @@ impl ZellijPlugin for State {
         let separator = if !self.mode_info.capabilities.arrow_fonts {
             ARROW_SEPARATOR
         } else {
-            &""
+            ""
         };
 
-        let colored_elements = color_elements(self.mode_info.palette);
+        let colored_elements = color_elements(self.mode_info.style.colors);
         let superkey = superkey(colored_elements, separator);
         let ctrl_keys = ctrl_keys(
             &self.mode_info,
@@ -191,7 +191,7 @@ impl ZellijPlugin for State {
 
         // [48;5;238m is gray background, [0K is so that it fills the rest of the line
         // [m is background reset, [0K is so that it clears the rest of the line
-        match self.mode_info.palette.gray {
+        match self.mode_info.style.colors.gray {
             PaletteColor::Rgb((r, g, b)) => {
                 println!("{}\u{1b}[48;2;{};{};{}m\u{1b}[0K", first_line, r, g, b);
             }
@@ -208,25 +208,28 @@ impl State {
         let active_tab = self.tabs.iter().find(|t| t.active);
 
         if let Some(copy_destination) = self.text_copy_destination {
-            text_copied_hint(&self.mode_info.palette, copy_destination)
+            text_copied_hint(&self.mode_info.style.colors, copy_destination)
         } else if self.display_system_clipboard_failure {
-            system_clipboard_error(&self.mode_info.palette)
+            system_clipboard_error(&self.mode_info.style.colors)
         } else if let Some(active_tab) = active_tab {
             if active_tab.is_fullscreen_active {
                 match self.mode_info.mode {
-                    InputMode::Normal => {
-                        fullscreen_panes_to_hide(&self.mode_info.palette, active_tab.panes_to_hide)
-                    }
+                    InputMode::Normal => fullscreen_panes_to_hide(
+                        &self.mode_info.style.colors,
+                        active_tab.panes_to_hide,
+                    ),
                     InputMode::Locked => locked_fullscreen_panes_to_hide(
-                        &self.mode_info.palette,
+                        &self.mode_info.style.colors,
                         active_tab.panes_to_hide,
                     ),
                     _ => keybinds(&self.mode_info, &self.tip_name, cols),
                 }
             } else if active_tab.are_floating_panes_visible {
                 match self.mode_info.mode {
-                    InputMode::Normal => floating_panes_are_visible(&self.mode_info.palette),
-                    InputMode::Locked => locked_floating_panes_are_visible(&self.mode_info.palette),
+                    InputMode::Normal => floating_panes_are_visible(&self.mode_info.style.colors),
+                    InputMode::Locked => {
+                        locked_floating_panes_are_visible(&self.mode_info.style.colors)
+                    }
                     _ => keybinds(&self.mode_info, &self.tip_name, cols),
                 }
             } else {
diff --git a/default-plugins/status-bar/src/second_line.rs b/default-plugins/status-bar/src/second_line.rs
index 77868a72c..9601c4251 100644
--- a/default-plugins/status-bar/src/second_line.rs
+++ b/default-plugins/status-bar/src/second_line.rs
@@ -193,11 +193,11 @@ fn full_shortcut_list_nonstandard_mode(
     move |help| {
         let mut line_part = LinePart::default();
         for (i, (letter, description)) in help.keybinds.iter().enumerate() {
-            let shortcut = full_length_shortcut(i == 0, letter, description, help.palette);
+            let shortcut = full_length_shortcut(i == 0, letter, description, help.style.colors);
             line_part.len += shortcut.len;
             line_part.part = format!("{}{}", line_part.part, shortcut,);
         }
-        let select_pane_shortcut = extra_hint_producing_function(help.palette);
+        let select_pane_shortcut = extra_hint_producing_function(help.style.colors);
         line_part.len += select_pane_shortcut.len;
         line_part.part = format!("{}{}", line_part.part, select_pane_shortcut,);
         line_part
@@ -206,8 +206,8 @@ fn full_shortcut_list_nonstandard_mode(
 
 fn full_shortcut_list(help: &ModeInfo, tip: TipFn) -> LinePart {
     match help.mode {
-        InputMode::Normal => tip(help.palette),
-        InputMode::Locked => locked_interface_indication(help.palette),
+        InputMode::Normal => tip(help.style.colors),
+        InputMode::Locked => locked_interface_indication(help.style.colors),
         InputMode::Tmux => full_tmux_mode_indication(help),
         InputMode::RenamePane => full_shortcut_list_nonstandard_mode(select_pane_shortcut)(help),
         _ => full_shortcut_list_nonstandard_mode(confirm_pane_selection)(help),
@@ -220,11 +220,11 @@ fn shortened_shortcut_list_nonstandard_mode(
     move |help| {
         let mut line_part = LinePart::default();
         for (i, (letter, description)) in help.keybinds.iter().enumerate() {
-            let shortcut = first_word_shortcut(i == 0, letter, description, help.palette);
+            let shortcut = first_word_shortcut(i == 0, letter, description, help.style.colors);
             line_part.len += shortcut.len;
             line_part.part = format!("{}{}", line_part.part, shortcut,);
         }
-        let select_pane_shortcut = extra_hint_producing_function(help.palette);
+        let select_pane_shortcut = extra_hint_producing_function(help.style.colors);
         line_part.len += select_pane_shortcut.len;
         line_part.part = format!("{}{}", line_part.part, select_pane_shortcut,);
         line_part
@@ -233,8 +233,8 @@ fn shortened_shortcut_list_nonstandard_mode(
 
 fn shortened_shortcut_list(help: &ModeInfo, tip: TipFn) -> LinePart {
     match help.mode {
-        InputMode::Normal => tip(help.palette),
-        InputMode::Locked => locked_interface_indication(help.palette),
+        InputMode::Normal => tip(help.style.colors),
+        InputMode::Locked => locked_interface_indication(help.style.colors),
         InputMode::Tmux => short_tmux_mode_indication(help),
         InputMode::RenamePane => {
             shortened_shortcut_list_nonstandard_mode(select_pane_shortcut)(help)
@@ -249,7 +249,7 @@ fn best_effort_shortcut_list_nonstandard_mode(
     move |help, max_len| {
         let mut line_part = LinePart::default();
         for (i, (letter, description)) in help.keybinds.iter().enumerate() {
-            let shortcut = first_word_shortcut(i == 0, letter, description, help.palette);
+            let shortcut = first_word_shortcut(i == 0, letter, description, help.style.colors);
             if line_part.len + shortcut.len + MORE_MSG.chars().count() > max_len {
                 // TODO: better
                 line_part.part = format!("{}{}", line_part.part, MORE_MSG);
@@ -259,7 +259,7 @@ fn best_effort_shortcut_list_nonstandard_mode(
             line_part.len += shortcut.len;
             line_part.part = format!("{}{}", line_part.part, shortcut);
         }
-        let select_pane_shortcut = extra_hint_producing_function(help.palette);
+        let select_pane_shortcut = extra_hint_producing_function(help.style.colors);
         if line_part.len + select_pane_shortcut.len <= max_len {
             line_part.len += select_pane_shortcut.len;
             line_part.part = format!("{}{}", line_part.part, select_pane_shortcut,);
@@ -271,7 +271,7 @@ fn best_effort_shortcut_list_nonstandard_mode(
 fn best_effort_tmux_shortcut_list(help: &ModeInfo, max_len: usize) -> LinePart {
     let mut line_part = tmux_mode_indication(help);
     for (i, (letter, description)) in help.keybinds.iter().enumerate() {
-        let shortcut = first_word_shortcut(i == 0, letter, description, help.palette);
+        let shortcut = first_word_shortcut(i == 0, letter, description, help.style.colors);
         if line_part.len + shortcut.len + MORE_MSG.chars().count() > max_len {
             // TODO: better
             line_part.part = format!("{}{}", line_part.part, MORE_MSG);
@@ -287,7 +287,7 @@ fn best_effort_tmux_shortcut_list(help: &ModeInfo, max_len: usize) -> LinePart {
 fn best_effort_shortcut_list(help: &ModeInfo, tip: TipFn, max_len: usize) -> LinePart {
     match help.mode {
         InputMode::Normal => {
-            let line_part = tip(help.palette);
+            let line_part = tip(help.style.colors);
             if line_part.len <= max_len {
                 line_part
             } else {
@@ -295,7 +295,7 @@ fn best_effort_shortcut_list(help: &ModeInfo, tip: TipFn, max_len: usize) -> Lin
             }
         }
         InputMode::Locked => {
-            let line_part = locked_interface_indication(help.palette);
+            let line_part = locked_interface_indication(help.style.colors);
             if line_part.len <= max_len {
                 line_part
             } else {
@@ -448,11 +448,11 @@ pub fn floating_panes_are_visible(palette: &Palette) -> LinePart {
 }
 
 pub fn tmux_mode_indication(help: &ModeInfo) -> LinePart {
-    let white_color = match help.palette.white {
+    let white_color = match help.style.colors.white {
         PaletteColor::Rgb((r, g, b)) => RGB(r, g, b),
         PaletteColor::EightBit(color) => Fixed(color),
     };
-    let orange_color = match help.palette.orange {
+    let orange_color = match help.style.colors.orange {
         PaletteColor::Rgb((r, g, b)) => RGB(r, g, b),
         PaletteColor::EightBit(color) => Fixed(color),
     };
@@ -472,11 +472,11 @@ pub fn tmux_mode_indication(help: &ModeInfo) -> LinePart {
 }
 
 pub fn full_tmux_mode_indication(help: &ModeInfo) -> LinePart {
-    let white_color = match help.palette.white {
+    let white_color = match help.style.colors.white {
         PaletteColor::Rgb((r, g, b)) => RGB(r, g, b),
         PaletteColor::EightBit(color) => Fixed(color),
     };
-    let orange_color = match help.palette.orange {
+    let orange_color = match help.style.colors.orange {
         PaletteColor::Rgb((r, g, b)) => RGB(r, g, b),
         PaletteColor::EightBit(color) => Fixed(color),
     };
@@ -494,7 +494,7 @@ pub fn full_tmux_mode_indication(help: &ModeInfo) -> LinePart {
     };
 
     for (i, (letter, description)) in help.keybinds.iter().enumerate() {
-        let shortcut = full_length_shortcut(i == 0, letter, description, help.palette);
+        let shortcut = full_length_shortcut(i == 0, letter, description, help.style.colors);
         line_part.len += shortcut.len;
         line_part.part = format!("{}{}", line_part.part, shortcut,);
     }
@@ -502,11 +502,11 @@ pub fn full_tmux_mode_indication(help: &ModeInfo) -> LinePart {
 }
 
 pub fn short_tmux_mode_indication(help: &ModeInfo) -> LinePart {
-    let white_color = match help.palette.white {
+    let white_color = match help.style.colors.white {
         PaletteColor::Rgb((r, g, b)) => RGB(r, g, b),
         PaletteColor::EightBit(color) => Fixed(color),
     };
-    let orange_color = match help.palette.orange {
+    let orange_color = match help.style.colors.orange {
         PaletteColor::Rgb((r, g, b)) => RGB(r, g, b),
         PaletteColor::EightBit(color) => Fixed(color),
     };
@@ -524,7 +524,7 @@ pub fn short_tmux_mode_indication(help: &ModeInfo) -> LinePart {
     };
 
     for (i, (letter, description)) in help.keybinds.iter().enumerate() {
-        let shortcut = first_word_shortcut(i == 0, letter, description, help.palette);
+        let shortcut = first_word_shortcut(i == 0, letter, description, help.style.colors);
         line_part.len += shortcut.len;
         line_part.part = format!("{}{}", line_part.part, shortcut);
     }
diff --git a/default-plugins/tab-bar/src/main.rs b/default-plugins/tab-bar/src/main.rs
index 3db531384..05f241bbb 100644
--- a/default-plugins/tab-bar/src/main.rs
+++ b/default-plugins/tab-bar/src/main.rs
@@ -83,7 +83,7 @@ impl ZellijPlugin for State {
                 tabname,
                 t.active,
                 t.is_sync_panes_active,
-                self.mode_info.palette,
+                self.mode_info.style.colors,
                 self.mode_info.capabilities,
                 t.other_focused_clients.as_slice(),
             );
@@ -94,7 +94,7 @@ impl ZellijPlugin for State {
             all_tabs,
             active_tab_index,
             cols.saturating_sub(1),
-            self.mode_info.palette,
+            self.mode_info.style.colors,
             self.mode_info.capabilities,
         );
         let mut s = String::new();
@@ -113,7 +113,7 @@ impl ZellijPlugin for State {
             }
             len_cnt += bar_part.len;
         }
-        match self.mode_info.palette.gray {
+        match self.mode_info.style.colors.gray {
             PaletteColor::Rgb((r, g, b)) => {
                 println!("{}\u{1b}[48;2;{};{};{}m\u{1b}[0K", s, r, g, b);
             }
diff --git a/src/tests/e2e/remote_runner.rs b/src/tests/e2e/remote_runner.rs
index 4a7d7fbfd..042ae9b6f 100644
--- a/src/tests/e2e/remote_runner.rs
+++ b/src/tests/e2e/remote_runner.rs
@@ -1,10 +1,10 @@
 use std::sync::atomic::{AtomicBool, Ordering};
 use std::sync::{Arc, Mutex};
-use zellij_tile::data::Palette;
 
 use zellij_server::panes::{LinkHandler, TerminalPane};
 use zellij_utils::pane_size::{Dimension, PaneGeom, Size};
-use zellij_utils::{vte, zellij_tile};
+use zellij_utils::vte;
+use zellij_utils::zellij_tile::prelude::Style;
 
 use ssh2::Session;
 use std::io::prelude::*;
@@ -157,7 +157,7 @@ fn read_from_channel(
                 let mut terminal_output = TerminalPane::new(
                     0,
                     pane_geom,
-                    Palette::default(),
+                    Style::default(),
                     0,
                     String::new(),
                     Rc::new(RefCell::new(LinkHandler::new())),
diff --git a/zellij-client/src/lib.rs b/zellij-client/src/lib.rs
index bd5db5cd1..207216638 100644
--- a/zellij-client/src/lib.rs
+++ b/zellij-client/src/lib.rs
@@ -10,6 +10,7 @@ use std::io::{self, Write};
 use std::path::Path;
 use std::process::Command;
 use std::thread;
+use zellij_tile::prelude::Style;
 
 use crate::{
     command_is_executing::CommandIsExecuting, input_handler::input_loop,
@@ -146,7 +147,10 @@ pub fn start_client(
     let full_screen_ws = os_input.get_terminal_size_using_fd(0);
     let client_attributes = ClientAttributes {
         size: full_screen_ws,
-        palette,
+        style: Style {
+            colors: palette,
+            rounded_corners: config.ui.unwrap_or_default().pane_frames.rounded_corners,
+        },
     };
 
     let first_msg = match info {
diff --git a/zellij-server/src/lib.rs b/zellij-server/src/lib.rs
index 7880d5f9d..13d2f5c56 100644
--- a/zellij-server/src/lib.rs
+++ b/zellij-server/src/lib.rs
@@ -18,13 +18,14 @@ use std::{
     sync::{Arc, Mutex, RwLock},
     thread,
 };
+use zellij_tile::prelude::Style;
 use zellij_utils::envs;
 use zellij_utils::nix::sys::stat::{umask, Mode};
 use zellij_utils::pane_size::Size;
 use zellij_utils::zellij_tile;
 
 use wasmer::Store;
-use zellij_tile::data::{Event, Palette, PluginCapabilities};
+use zellij_tile::data::{Event, PluginCapabilities};
 
 use crate::{
     os_input_output::ServerOsApi,
@@ -100,7 +101,7 @@ impl ErrorInstruction for ServerInstruction {
 pub(crate) struct SessionMetaData {
     pub senders: ThreadSenders,
     pub capabilities: PluginCapabilities,
-    pub palette: Palette,
+    pub style: Style,
     pub default_shell: Option<TerminalAction>,
     screen_thread: Option<thread::JoinHandle<()>>,
     pty_thread: Option<thread::JoinHandle<()>>,
@@ -371,8 +372,7 @@ pub fn start_server(mut os_input: Box<dyn ServerOsApi>, socket_path: PathBuf) {
                     .send_to_plugin(PluginInstruction::AddClient(client_id))
                     .unwrap();
                 let default_mode = options.default_mode.unwrap_or_default();
-                let mode_info =
-                    get_mode_info(default_mode, attrs.palette, session_data.capabilities);
+                let mode_info = get_mode_info(default_mode, attrs.style, session_data.capabilities);
                 let mode = mode_info.mode;
                 session_data
                     .senders
@@ -645,7 +645,7 @@ fn init_session(
         },
         capabilities,
         default_shell,
-        palette: client_attributes.palette,
+        style: client_attributes.style,
         screen_thread: Some(screen_thread),
         pty_thread: Some(pty_thread),
         wasm_thread: Some(wasm_thread),
diff --git a/zellij-server/src/panes/floating_panes/mod.rs b/zellij-server/src/panes/floating_panes/mod.rs
index 99cf7e9de..e4925c365 100644
--- a/zellij-server/src/panes/floating_panes/mod.rs
+++ b/zellij-server/src/panes/floating_panes/mod.rs
@@ -1,5 +1,5 @@
+use zellij_tile::prelude::Style;
 mod floating_pane_grid;
-
 use zellij_utils::{position::Position, zellij_tile};
 
 use crate::tab::Pane;
@@ -16,7 +16,7 @@ use std::cell::RefCell;
 use std::collections::{BTreeMap, HashMap, HashSet};
 use std::rc::Rc;
 use std::time::Instant;
-use zellij_tile::data::{ModeInfo, Palette};
+use zellij_tile::data::ModeInfo;
 use zellij_utils::pane_size::{Offset, PaneGeom, Size, Viewport};
 
 macro_rules! resize_pty {
@@ -41,7 +41,7 @@ pub struct FloatingPanes {
     connected_clients_in_app: Rc<RefCell<HashSet<ClientId>>>,
     mode_info: Rc<RefCell<HashMap<ClientId, ModeInfo>>>,
     default_mode_info: ModeInfo,
-    colors: Palette,
+    style: Style,
     session_is_mirrored: bool,
     desired_pane_positions: HashMap<PaneId, PaneGeom>, // this represents the positions of panes the user moved with intention, rather than by resizing the terminal window
     z_indices: Vec<PaneId>,
@@ -51,6 +51,7 @@ pub struct FloatingPanes {
 }
 
 #[allow(clippy::borrowed_box)]
+#[allow(clippy::too_many_arguments)]
 impl FloatingPanes {
     pub fn new(
         display_area: Rc<RefCell<Size>>,
@@ -60,7 +61,7 @@ impl FloatingPanes {
         mode_info: Rc<RefCell<HashMap<ClientId, ModeInfo>>>,
         session_is_mirrored: bool,
         default_mode_info: ModeInfo,
-        colors: Palette,
+        style: Style,
     ) -> Self {
         FloatingPanes {
             panes: BTreeMap::new(),
@@ -71,7 +72,7 @@ impl FloatingPanes {
             mode_info,
             session_is_mirrored,
             default_mode_info,
-            colors,
+            style,
             desired_pane_positions: HashMap::new(),
             z_indices: vec![],
             show_panes: false,
@@ -198,7 +199,7 @@ impl FloatingPanes {
             let mut pane_contents_and_ui = PaneContentsAndUi::new(
                 pane,
                 output,
-                self.colors,
+                self.style,
                 &active_panes,
                 multiple_users_exist_in_session,
                 Some(z_index + 1), // +1 because 0 is reserved for non-floating panes
@@ -207,7 +208,7 @@ impl FloatingPanes {
                 let client_mode = self
                     .mode_info
                     .borrow()
-                    .get(&client_id)
+                    .get(client_id)
                     .unwrap_or(&self.default_mode_info)
                     .mode;
                 pane_contents_and_ui.render_pane_frame(
diff --git a/zellij-server/src/panes/terminal_pane.rs b/zellij-server/src/panes/terminal_pane.rs
index 5ac94c4f3..fb6a07221 100644
--- a/zellij-server/src/panes/terminal_pane.rs
+++ b/zellij-server/src/panes/terminal_pane.rs
@@ -13,13 +13,14 @@ use std::fmt::Debug;
 use std::os::unix::io::RawFd;
 use std::rc::Rc;
 use std::time::{self, Instant};
+use zellij_tile::prelude::Style;
 use zellij_utils::pane_size::Offset;
 use zellij_utils::{
     pane_size::{Dimension, PaneGeom},
     position::Position,
     shared::make_terminal_title,
     vte,
-    zellij_tile::data::{InputMode, Palette, PaletteColor},
+    zellij_tile::data::{InputMode, PaletteColor},
 };<