fix(sixel): report pixel size in winsize change ioctl (#2212)

* fix(sixel): report pixel size in winsize change ioctl

* style(fmt): rustfmt

8 files changed, 246 insertions, 44 deletions

diff --git a/zellij-server/src/os_input_output.rs b/zellij-server/src/os_input_output.rs
index e9caec061..873451dea 100644
--- a/zellij-server/src/os_input_output.rs
+++ b/zellij-server/src/os_input_output.rs
@@ -43,16 +43,24 @@ use std::{
 pub use async_trait::async_trait;
 pub use nix::unistd::Pid;
 
-fn set_terminal_size_using_fd(fd: RawFd, columns: u16, rows: u16) {
+fn set_terminal_size_using_fd(
+    fd: RawFd,
+    columns: u16,
+    rows: u16,
+    width_in_pixels: Option<u16>,
+    height_in_pixels: Option<u16>,
+) {
     // TODO: do this with the nix ioctl
     use libc::ioctl;
     use libc::TIOCSWINSZ;
 
+    let ws_xpixel = width_in_pixels.unwrap_or(0);
+    let ws_ypixel = height_in_pixels.unwrap_or(0);
     let winsize = Winsize {
         ws_col: columns,
         ws_row: rows,
-        ws_xpixel: 0,
-        ws_ypixel: 0,
+        ws_xpixel,
+        ws_ypixel,
     };
     // TIOCGWINSZ is an u32, but the second argument to ioctl is u64 on
     // some platforms. When checked on Linux, clippy will complain about
@@ -414,7 +422,7 @@ pub struct ServerOsInputOutput {
     // not connected to an fd (eg.
     // a command pane with a
     // non-existing command)
-    cached_resizes: Arc<Mutex<Option<BTreeMap<u32, (u16, u16)>>>>, // <terminal_id, (cols, rows)>
+    cached_resizes: Arc<Mutex<Option<BTreeMap<u32, (u16, u16, Option<u16>, Option<u16>)>>>>, // <terminal_id, (cols, rows, width_in_pixels, height_in_pixels)>
 }
 
 // async fn in traits is not supported by rust, so dtolnay's excellent async_trait macro is being
@@ -448,7 +456,14 @@ impl AsyncReader for RawFdAsyncReader {
 /// The `ServerOsApi` trait represents an abstract interface to the features of an operating system that
 /// Zellij server requires.
 pub trait ServerOsApi: Send + Sync {
-    fn set_terminal_size_using_terminal_id(&self, id: u32, cols: u16, rows: u16) -> Result<()>;
+    fn set_terminal_size_using_terminal_id(
+        &self,
+        id: u32,
+        cols: u16,
+        rows: u16,
+        width_in_pixels: Option<u16>,
+        height_in_pixels: Option<u16>,
+    ) -> Result<()>;
     /// Spawn a new terminal, with a terminal action. The returned tuple contains the master file
     /// descriptor of the forked pseudo terminal and a [ChildId] struct containing process id's for
     /// the forked child process.
@@ -501,7 +516,14 @@ pub trait ServerOsApi: Send + Sync {
 }
 
 impl ServerOsApi for ServerOsInputOutput {
-    fn set_terminal_size_using_terminal_id(&self, id: u32, cols: u16, rows: u16) -> Result<()> {
+    fn set_terminal_size_using_terminal_id(
+        &self,
+        id: u32,
+        cols: u16,
+        rows: u16,
+        width_in_pixels: Option<u16>,
+        height_in_pixels: Option<u16>,
+    ) -> Result<()> {
         let err_context = || {
             format!(
                 "failed to set terminal id {} to size ({}, {})",
@@ -509,7 +531,7 @@ impl ServerOsApi for ServerOsInputOutput {
             )
         };
         if let Some(cached_resizes) = self.cached_resizes.lock().unwrap().as_mut() {
-            cached_resizes.insert(id, (cols, rows));
+            cached_resizes.insert(id, (cols, rows, width_in_pixels, height_in_pixels));
             return Ok(());
         }
 
@@ -522,7 +544,7 @@ impl ServerOsApi for ServerOsInputOutput {
         {
             Some(Some(fd)) => {
                 if cols > 0 && rows > 0 {
-                    set_terminal_size_using_fd(*fd, cols, rows);
+                    set_terminal_size_using_fd(*fd, cols, rows, width_in_pixels, height_in_pixels);
                 }
             },
             _ => {
@@ -785,8 +807,16 @@ impl ServerOsApi for ServerOsInputOutput {
     fn apply_cached_resizes(&mut self) {
         let mut cached_resizes = self.cached_resizes.lock().unwrap().take();
         if let Some(cached_resizes) = cached_resizes.as_mut() {
-            for (terminal_id, (cols, rows)) in cached_resizes.iter() {
-                let _ = self.set_terminal_size_using_terminal_id(*terminal_id, *cols, *rows);
+            for (terminal_id, (cols, rows, width_in_pixels, height_in_pixels)) in
+                cached_resizes.iter()
+            {
+                let _ = self.set_terminal_size_using_terminal_id(
+                    *terminal_id,
+                    *cols,
+                    *rows,
+                    width_in_pixels.clone(),
+                    height_in_pixels.clone(),
+                );
             }
         }
     }
diff --git a/zellij-server/src/panes/floating_panes/mod.rs b/zellij-server/src/panes/floating_panes/mod.rs
index 399d16c98..765f0196d 100644
--- a/zellij-server/src/panes/floating_panes/mod.rs
+++ b/zellij-server/src/panes/floating_panes/mod.rs
@@ -26,7 +26,7 @@ use zellij_utils::{
     errors::prelude::*,
     input::command::RunCommand,
     input::layout::FloatingPaneLayout,
-    pane_size::{Dimension, Offset, PaneGeom, Size, Viewport},
+    pane_size::{Dimension, Offset, PaneGeom, Size, SizeInPixels, Viewport},
 };
 
 const RESIZE_INCREMENT_WIDTH: usize = 5;
@@ -39,6 +39,7 @@ pub struct FloatingPanes {
     connected_clients: Rc<RefCell<HashSet<ClientId>>>,
     connected_clients_in_app: Rc<RefCell<HashSet<ClientId>>>,
     mode_info: Rc<RefCell<HashMap<ClientId, ModeInfo>>>,
+    character_cell_size: Rc<RefCell<Option<SizeInPixels>>>,
     default_mode_info: ModeInfo,
     style: Style,
     session_is_mirrored: bool,
@@ -59,6 +60,7 @@ impl FloatingPanes {
         connected_clients: Rc<RefCell<HashSet<ClientId>>>,
         connected_clients_in_app: Rc<RefCell<HashSet<ClientId>>>,
         mode_info: Rc<RefCell<HashMap<ClientId, ModeInfo>>>,
+        character_cell_size: Rc<RefCell<Option<SizeInPixels>>>,
         session_is_mirrored: bool,
         default_mode_info: ModeInfo,
         style: Style,
@@ -72,6 +74,7 @@ impl FloatingPanes {
             connected_clients,
             connected_clients_in_app,
             mode_info,
+            character_cell_size,
             session_is_mirrored,
             default_mode_info,
             style,
@@ -304,7 +307,8 @@ impl FloatingPanes {
             } else {
                 pane.set_content_offset(Offset::default());
             }
-            resize_pty!(pane, os_api, self.senders).with_context(|| err_context(&pane.pid()))?;
+            resize_pty!(pane, os_api, self.senders, self.character_cell_size)
+                .with_context(|| err_context(&pane.pid()))?;
         }
         Ok(())
     }
@@ -390,7 +394,7 @@ impl FloatingPanes {
 
     pub fn resize_pty_all_panes(&mut self, os_api: &mut Box<dyn ServerOsApi>) -> Result<()> {
         for pane in self.panes.values_mut() {
-            resize_pty!(pane, os_api, self.senders)
+            resize_pty!(pane, os_api, self.senders, self.character_cell_size)
                 .with_context(|| format!("failed to resize PTY in pane {:?}", pane.pid()))?;
         }
         Ok(())
@@ -424,7 +428,8 @@ impl FloatingPanes {
                 .with_context(err_context)?;
 
             for pane in self.panes.values_mut() {
-                resize_pty!(pane, os_api, self.senders).with_context(err_context)?;
+                resize_pty!(pane, os_api, self.senders, self.character_cell_size)
+                    .with_context(err_context)?;
             }
             self.set_force_render();
             return Ok(true);
@@ -833,7 +838,7 @@ impl FloatingPanes {
             if let Some(geom) = prev_geom_override {
                 new_position.set_geom_override(geom);
             }
-            resize_pty!(new_position, os_api, self.senders).unwrap();
+            resize_pty!(new_position, os_api, self.senders, self.character_cell_size).unwrap();
             new_position.set_should_render(true);
 
             let current_position = self.panes.get_mut(&active_pane_id).unwrap();
@@ -841,7 +846,13 @@ impl FloatingPanes {
             if let Some(geom) = next_geom_override {
                 current_position.set_geom_override(geom);
             }
-            resize_pty!(current_position, os_api, self.senders).unwrap();
+            resize_pty!(
+                current_position,
+                os_api,
+                self.senders,
+                self.character_cell_size
+            )
+            .unwrap();
             current_position.set_should_render(true);
             self.focus_pane_for_all_clients(active_pane_id);
         }
diff --git a/zellij-server/src/panes/tiled_panes/mod.rs b/zellij-server/src/panes/tiled_panes/mod.rs
index 28941746e..ac0f8c635 100644
--- a/zellij-server/src/panes/tiled_panes/mod.rs
+++ b/zellij-server/src/panes/tiled_panes/mod.rs
@@ -300,7 +300,7 @@ impl TiledPanes {
                 }
             }
 
-            resize_pty!(pane, self.os_api, self.senders).unwrap();
+            resize_pty!(pane, self.os_api, self.senders, self.character_cell_size).unwrap();
         }
         self.reset_boundaries();
     }
@@ -781,7 +781,7 @@ impl TiledPanes {
             }
 
             for pane in self.panes.values_mut() {
-                resize_pty!(pane, self.os_api, self.senders).unwrap();
+                resize_pty!(pane, self.os_api, self.senders, self.character_cell_size).unwrap();
             }
             self.reset_boundaries();
         }
@@ -1071,7 +1071,13 @@ impl TiledPanes {
             if let Some(geom) = prev_geom_override {
                 new_position.set_geom_override(geom);
             }
-            resize_pty!(new_position, self.os_api, self.senders).unwrap();
+            resize_pty!(
+                new_position,
+                self.os_api,
+                self.senders,
+                self.character_cell_size
+            )
+            .unwrap();
             new_position.set_should_render(true);
 
             let current_position = self.panes.get_mut(&active_pane_id).unwrap();
@@ -1079,7 +1085,13 @@ impl TiledPanes {
             if let Some(geom) = next_geom_override {
                 current_position.set_geom_override(geom);
             }
-            resize_pty!(current_position, self.os_api, self.senders).unwrap();
+            resize_pty!(
+                current_position,
+                self.os_api,
+                self.senders,
+                self.character_cell_size
+            )
+            .unwrap();
             current_position.set_should_render(true);
             self.focus_pane_for_all_clients(active_pane_id);
             self.set_pane_frames(self.draw_pane_frames);
@@ -1123,7 +1135,13 @@ impl TiledPanes {
         if let Some(geom) = prev_geom_override {
             new_position.set_geom_override(geom);
         }
-        resize_pty!(new_position, self.os_api, self.senders).unwrap();
+        resize_pty!(
+            new_position,
+            self.os_api,
+            self.senders,
+            self.character_cell_size
+        )
+        .unwrap();
         new_position.set_should_render(true);
 
         let current_position = self.panes.get_mut(&active_pane_id).unwrap();
@@ -1131,7 +1149,13 @@ impl TiledPanes {
         if let Some(geom) = next_geom_override {
             current_position.set_geom_override(geom);
         }
-        resize_pty!(current_position, self.os_api, self.senders).unwrap();
+        resize_pty!(
+            current_position,
+            self.os_api,
+            self.senders,
+            self.character_cell_size
+        )
+        .unwrap();
         current_position.set_should_render(true);
         self.set_pane_frames(self.draw_pane_frames);
     }
@@ -1159,7 +1183,13 @@ impl TiledPanes {
                 if let Some(geom) = prev_geom_override {
                     new_position.set_geom_override(geom);
                 }
-                resize_pty!(new_position, self.os_api, self.senders).unwrap();
+                resize_pty!(
+                    new_position,
+                    self.os_api,
+                    self.senders,
+                    self.character_cell_size
+                )
+                .unwrap();
                 new_position.set_should_render(true);
 
                 let current_position = self.panes.get_mut(active_pane_id).unwrap();
@@ -1167,7 +1197,13 @@ impl TiledPanes {
                 if let Some(geom) = next_geom_override {
                     current_position.set_geom_override(geom);
                 }
-                resize_pty!(current_position, self.os_api, self.senders).unwrap();
+                resize_pty!(
+                    current_position,
+                    self.os_api,
+                    self.senders,
+                    self.character_cell_size
+                )
+                .unwrap();
                 current_position.set_should_render(true);
                 self.set_pane_frames(self.draw_pane_frames);
             }
@@ -1195,7 +1231,13 @@ impl TiledPanes {
                 if let Some(geom) = prev_geom_override {
                     new_position.set_geom_override(geom);
                 }
-                resize_pty!(new_position, self.os_api, self.senders).unwrap();
+                resize_pty!(
+                    new_position,
+                    self.os_api,
+                    self.senders,
+                    self.character_cell_size
+                )
+                .unwrap();
                 new_position.set_should_render(true);
 
                 let current_position = self.panes.get_mut(active_pane_id).unwrap();
@@ -1203,7 +1245,13 @@ impl TiledPanes {
                 if let Some(geom) = next_geom_override {
                     current_position.set_geom_override(geom);
                 }
-                resize_pty!(current_position, self.os_api, self.senders).unwrap();
+                resize_pty!(
+                    current_position,
+                    self.os_api,
+                    self.senders,
+                    self.character_cell_size
+                )
+                .unwrap();
                 current_position.set_should_render(true);
                 self.set_pane_frames(self.draw_pane_frames);
             }
@@ -1231,7 +1279,13 @@ impl TiledPanes {
                 if let Some(geom) = prev_geom_override {
                     new_position.set_geom_override(geom);
                 }
-                resize_pty!(new_position, self.os_api, self.senders).unwrap();
+                resize_pty!(
+                    new_position,
+                    self.os_api,
+                    self.senders,
+                    self.character_cell_size
+                )
+                .unwrap();
                 new_position.set_should_render(true);
 
                 let current_position = self.panes.get_mut(active_pane_id).unwrap();
@@ -1239,7 +1293,13 @@ impl TiledPanes {
                 if let Some(geom) = next_geom_override {
                     current_position.set_geom_override(geom);
                 }
-                resize_pty!(current_position, self.os_api, self.senders).unwrap();
+                resize_pty!(
+                    current_position,
+                    self.os_api,
+                    self.senders,
+                    self.character_cell_size
+                )
+                .unwrap();
                 current_position.set_should_render(true);
                 self.set_pane_frames(self.draw_pane_frames);
             }
@@ -1269,7 +1329,13 @@ impl TiledPanes {
                 if let Some(geom) = prev_geom_override {
                     new_position.set_geom_override(geom);
                 }
-                resize_pty!(new_position, self.os_api, self.senders).unwrap();
+                resize_pty!(
+                    new_position,
+                    self.os_api,
+                    self.senders,
+                    self.character_cell_size
+                )
+                .unwrap();
                 new_position.set_should_render(true);
 
                 let current_position = self.panes.get_mut(active_pane_id).unwrap();
@@ -1277,7 +1343,13 @@ impl TiledPanes {
                 if let Some(geom) = next_geom_override {
                     current_position.set_geom_override(geom);
                 }
-                resize_pty!(current_position, self.os_api, self.senders).unwrap();
+                resize_pty!(
+                    current_position,
+                    self.os_api,
+                    self.senders,
+                    self.character_cell_size
+                )
+                .unwrap();
                 current_position.set_should_render(true);
                 self.set_pane_frames(self.draw_pane_frames);
             }
diff --git a/zellij-server/src/tab/layout_applier.rs b/zellij-server/src/tab/layout_applier.rs
index b2c3817bf..7964b6989 100644
--- a/zellij-server/src/tab/layout_applier.rs
+++ b/zellij-server/src/tab/layout_applier.rs
@@ -132,7 +132,7 @@ impl<'a> LayoutApplier<'a> {
                             Some(position_and_size),
                         );
                         pane_focuser.set_pane_id_in_focused_location(layout.focus, &pane);
-                        resize_pty!(pane, self.os_api, self.senders)?;
+                        resize_pty!(pane, self.os_api, self.senders, self.character_cell_size)?;
                         self.tiled_panes
                             .add_pane_with_existing_geom(pane.pid(), pane);
                     }
@@ -305,7 +305,12 @@ impl<'a> LayoutApplier<'a> {
                 );
                 new_pane.set_borderless(false);
                 new_pane.set_content_offset(Offset::frame(1));
-                resize_pty!(new_pane, self.os_api, self.senders)?;
+                resize_pty!(
+                    new_pane,
+                    self.os_api,
+                    self.senders,
+                    self.character_cell_size
+                )?;
                 self.floating_panes
                     .add_pane(PaneId::Plugin(pid), Box::new(new_pane));
                 if floating_pane_layout.focus.unwrap_or(false) {
@@ -340,7 +345,12 @@ impl<'a> LayoutApplier<'a> {
                 if let Some(held_command) = hold_for_command {
                     new_pane.hold(None, true, held_command.clone());
                 }
-                resize_pty!(new_pane, self.os_api, self.senders)?;
+                resize_pty!(
+                    new_pane,
+                    self.os_api,
+                    self.senders,
+                    self.character_cell_size
+                )?;
                 self.floating_panes
                     .add_pane(PaneId::Terminal(*pid), Box::new(new_pane));
                 if floating_pane_layout.focus.unwrap_or(false) {
@@ -398,7 +408,7 @@ impl<'a> LayoutApplier<'a> {
                     .focus
                     .or(Some(!layout_has_focused_pane));
                 pane_focuser.set_pane_id_in_focused_location(pane_is_focused, &pane);
-                resize_pty!(pane, self.os_api, self.senders)?;
+                resize_pty!(pane, self.os_api, self.senders, self.character_cell_size)?;
                 self.floating_panes.add_pane(pane.pid(), pane);
             }
         }
@@ -415,7 +425,7 @@ impl<'a> LayoutApplier<'a> {
                         );
                         pane_focuser
                             .set_pane_id_in_focused_location(Some(!layout_has_focused_pane), &pane);
-                        resize_pty!(pane, self.os_api, self.senders)?;
+                        resize_pty!(pane, self.os_api, self.senders, self.character_cell_size)?;
                         self.floating_panes.add_pane(pane.pid(), pane);
                     }
                 },
diff --git a/zellij-server/src/tab/mod.rs b/zellij-server/src/tab/mod.rs
index bcd549ccc..7cdef9619 100644
--- a/zellij-server/src/tab/mod.rs
+++ b/zellij-server/src/tab/mod.rs
@@ -63,6 +63,42 @@ macro_rules! resize_pty {
                 *pid,
                 $pane.get_content_columns() as u16,
                 $pane.get_content_rows() as u16,
+                None,
+                None,
+            ),
+            PaneId::Plugin(ref pid) => {
+                let err_context = || format!("failed to resize plugin {pid}");
+                $senders
+                    .send_to_plugin(PluginInstruction::Resize(
+                        *pid,
+                        $pane.get_content_columns(),
+                        $pane.get_content_rows(),
+                    ))
+                    .with_context(err_context)
+            },
+        }
+    }};
+    ($pane:expr, $os_input:expr, $senders:expr, $character_cell_size:expr) => {{
+        let (width_in_pixels, height_in_pixels) = {
+            let character_cell_size = $character_cell_size.borrow();
+            match *character_cell_size {
+                Some(size_in_pixels) => {
+                    let width_in_pixels =
+                        (size_in_pixels.width * $pane.get_content_columns()) as u16;
+                    let height_in_pixels =
+                        (size_in_pixels.height * $pane.get_content_rows()) as u16;
+                    (Some(width_in_pixels), Some(height_in_pixels))
+                },
+                None => (None, None),
+            }
+        };
+        match $pane.pid() {
+            PaneId::Terminal(ref pid) => $os_input.set_terminal_size_using_terminal_id(
+                *pid,
+                $pane.get_content_columns() as u16,
+                $pane.get_content_rows() as u16,
+                width_in_pixels,
+                height_in_pixels,
             ),
             PaneId::Plugin(ref pid) => {
                 let err_context = || format!("failed to resize plugin {pid}");
@@ -490,6 +526,7 @@ impl Tab {
             connected_clients.clone(),
             connected_clients_in_app,
             mode_info.clone(),
+            character_cell_size.clone(),
             session_is_mirrored,
             default_mode_info.clone(),
             style,
@@ -900,8 +937,13 @@ impl Tab {
                         embedded_pane_to_float.set_content_offset(Offset::frame(1));
                     }
                     embedded_pane_to_float.set_geom(new_pane_geom);
-                    resize_pty!(embedded_pane_to_float, self.os_api, self.senders)
-                        .with_context(err_context)?;
+                    resize_pty!(
+                        embedded_pane_to_float,
+                        self.os_api,
+                        self.senders,
+                        self.character_cell_size
+                    )
+                    .with_context(err_context)?;
                     embedded_pane_to_float.set_active_at(Instant::now());
                     self.floating_panes
                         .add_pane(focused_pane_id, embedded_pane_to_float);
@@ -1001,7 +1043,13 @@ impl Tab {
                     );
                     new_pane.set_active_at(Instant::now());
                     new_pane.set_content_offset(Offset::frame(1)); // floating panes always have a frame
-                    resize_pty!(new_pane, self.os_api, self.senders).with_context(err_context)?;
+                    resize_pty!(
+                        new_pane,
+                        self.os_api,
+                        self.senders,
+                        self.character_cell_size
+                    )
+                    .with_context(err_context)?;
                     self.floating_panes.add_pane(pid, Box::new(new_pane));
                     self.floating_panes.focus_pane_for_all_clients(pid);
                 }
@@ -1101,7 +1149,12 @@ impl Tab {
                         self.get_active_pane(client_id)
                             .with_context(|| format!("no active pane found for client {client_id}"))
                             .and_then(|current_active_pane| {
-                                resize_pty!(current_active_pane, self.os_api, self.senders)
+                                resize_pty!(
+                                    current_active_pane,
+                                    self.os_api,
+                                    self.senders,
+                                    self.character_cell_size
+                                )
                             })
                             .with_context(err_context)?;
                     },
@@ -1375,8 +1428,13 @@ impl Tab {
             })
         {
             if self.pids_waiting_resize.remove(&pid) {
-                resize_pty!(terminal_output, self.os_api, self.senders)
-                    .with_context(err_context)?;
+                resize_pty!(
+                    terminal_output,
+                    self.os_api,
+                    self.senders,
+                    self.character_cell_size
+                )
+                .with_context(err_context)?;
             }
             terminal_output.handle_pty_bytes(bytes);
             let messages_to_pty = terminal_output.drain_messages_to_pty();
@@ -2212,7 +2270,12 @@ impl Tab {
                     // the pane there we replaced. Now, we need to update its pty about its new size.
                     // We couldn't do that before, and we can't use the original moved item now - so we
                     // need to refetch it
-                    resize_pty!(suppressed_pane, self.os_api, self.senders)?;
+                    resize_pty!(
+                        suppressed_pane,
+                        self.os_api,
+                        self.senders,
+                        self.character_cell_size
+                    )?;
                 }
                 Ok(replaced_pane)
             })
diff --git a/zellij-server/src/tab/unit/tab_integration_tests.rs b/zellij-server/src/tab/unit/tab_integration_tests.rs
index 11de1c298..1652eb5ae 100644
--- a/zellij-server/src/tab/unit/tab_integration_tests.rs
+++ b/zellij-server/src/tab/unit/tab_integration_tests.rs
@@ -48,7 +48,14 @@ struct FakeInputOutput {
 }
 
 impl ServerOsApi for FakeInputOutput {
-    fn set_terminal_size_using_terminal_id(&self, _id: u32, _cols: u16, _rows: u16) -> Result<()> {
+    fn set_terminal_size_using_terminal_id(
+        &self,
+        _id: u32,
+        _cols: u16,
+        _rows: u16,
+        _width_in_pixels: Option<u16>,
+        _height_in_pixels: Option<u16>,
+    ) -> Result<()> {
         // noop
         Ok(())
     }
diff --git a/zellij-server/src/tab/unit/tab_tests.rs b/zellij-server/src/tab/unit/tab_tests.rs
index 8fbf66492..cb3d8f787 100644
--- a/zellij-server/src/tab/unit/tab_tests.rs
+++ b/zellij-server/src/tab/unit/tab_tests.rs
@@ -30,7 +30,14 @@ use zellij_utils::{
 struct FakeInputOutput {}
 
 impl ServerOsApi for FakeInputOutput {
-    fn set_terminal_size_using_terminal_id(&self, _id: u32, _cols: u16, _rows: u16) -> Result<()> {
+    fn set_terminal_size_using_terminal_id(
+        &self,
+        _id: u32,
+        _cols: u16,
+