feat(screen): allow specifying max panes on screen (#20)

19 files changed, 380 insertions, 88 deletions

diff --git a/src/main.rs b/src/main.rs
index 7b1293f3..f495dd21 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -28,7 +28,7 @@ enum ApiCommand {
     MoveFocus,
 }
 
-#[derive(StructOpt, Debug)]
+#[derive(StructOpt, Debug, Default)]
 #[structopt(name = "mosaic")]
 pub struct Opt {
     #[structopt(short, long)]
@@ -39,7 +39,10 @@ pub struct Opt {
     move_focus: bool,
     #[structopt(short, long)]
     /// Send "open file in new pane" to active mosaic session
-    open_file: Option<PathBuf>
+    open_file: Option<PathBuf>,
+    #[structopt(long)]
+    /// Maximum panes on screen, caution: opening more panes will close old ones
+    max_panes: Option<usize>
 }
 
 fn _debug_log_to_file (message: String) {
@@ -77,18 +80,18 @@ pub fn main() {
         let api_command = bincode::serialize(&ApiCommand::OpenFile(file_to_open)).unwrap();
         stream.write_all(&api_command).unwrap();
     } else {
-        start(Box::new(os_input));
+        start(Box::new(os_input), opts);
     }
 }
 
-pub fn start(mut os_input: Box<dyn OsApi>) {
+pub fn start(mut os_input: Box<dyn OsApi>, opts: Opt) {
     let mut active_threads = vec![];
 
     let full_screen_ws = os_input.get_terminal_size_using_fd(0);
     os_input.into_raw_mode(0);
     let (send_screen_instructions, receive_screen_instructions): (Sender<ScreenInstruction>, Receiver<ScreenInstruction>) = channel();
     let (send_pty_instructions, receive_pty_instructions): (Sender<PtyInstruction>, Receiver<PtyInstruction>) = channel();
-    let mut screen = Screen::new(receive_screen_instructions, send_pty_instructions.clone(), &full_screen_ws, os_input.clone());
+    let mut screen = Screen::new(receive_screen_instructions, send_pty_instructions.clone(), &full_screen_ws, os_input.clone(), opts.max_panes);
     let mut pty_bus = PtyBus::new(receive_pty_instructions, send_screen_instructions.clone(), os_input.clone());
 
     active_threads.push(
@@ -212,7 +215,7 @@ pub fn start(mut os_input: Box<dyn OsApi>) {
                             match &decoded {
                                 ApiCommand::OpenFile(file_name) => {
                                     let path = PathBuf::from(file_name);
-                                    send_pty_instructions.send(PtyInstruction::SpawnTerminalVertically(Some(path))).unwrap();
+                                    send_pty_instructions.send(PtyInstruction::SpawnTerminal(Some(path))).unwrap();
                                 }
                                 ApiCommand::SplitHorizontally => {
                                     send_pty_instructions.send(PtyInstruction::SpawnTerminalHorizontally(None)).unwrap();
diff --git a/src/screen.rs b/src/screen.rs
index ec72c8f3..670b90f1 100644
--- a/src/screen.rs
+++ b/src/screen.rs
@@ -78,6 +78,7 @@ pub enum ScreenInstruction {
 
 pub struct Screen {
     pub receiver: Receiver<ScreenInstruction>,
+    max_panes: Option<usize>,
     send_pty_instructions: Sender<PtyInstruction>,
     full_screen_ws: Winsize,
     terminals: BTreeMap<RawFd, TerminalPane>, // BTreeMap because we need a predictable order when changing focus
@@ -86,9 +87,16 @@ pub struct Screen {
 }
 
 impl Screen {
-    pub fn new (receive_screen_instructions: Receiver<ScreenInstruction>, send_pty_instructions: Sender<PtyInstruction>, full_screen_ws: &Winsize, os_api: Box<dyn OsApi>) -> Self {
+    pub fn new (
+        receive_screen_instructions: Receiver<ScreenInstruction>,
+        send_pty_instructions: Sender<PtyInstruction>,
+        full_screen_ws: &Winsize,
+        os_api: Box<dyn OsApi>,
+        max_panes: Option<usize>,
+    ) -> Self {
         Screen {
             receiver: receive_screen_instructions,
+            max_panes,
             send_pty_instructions,
             full_screen_ws: full_screen_ws.clone(),
             terminals: BTreeMap::new(),
@@ -97,6 +105,7 @@ impl Screen {
         }
     }
     pub fn new_pane(&mut self, pid: RawFd) {
+        self.close_down_to_max_terminals();
         if self.terminals.is_empty() {
             let x = 0;
             let y = 0;
@@ -146,6 +155,7 @@ impl Screen {
         }
     }
     pub fn horizontal_split(&mut self, pid: RawFd) {
+        self.close_down_to_max_terminals();
         if self.terminals.is_empty() {
             let x = 0;
             let y = 0;
@@ -187,6 +197,7 @@ impl Screen {
         }
     }
     pub fn vertical_split(&mut self, pid: RawFd) {
+        self.close_down_to_max_terminals();
         if self.terminals.is_empty() {
             let x = 0;
             let y = 0;
@@ -963,7 +974,24 @@ impl Screen {
         }
         None
     }
+    fn close_down_to_max_terminals (&mut self) {
+        if let Some(max_panes) = self.max_panes {
+            if self.terminals.len() >= max_panes {
+                for _ in max_panes..=self.terminals.len() {
+                    let first_pid = *self.terminals.iter().next().unwrap().0;
+                    self.send_pty_instructions.send(PtyInstruction::ClosePane(first_pid)).unwrap();
+                    self.close_pane_without_rerender(first_pid); // TODO: do not render yet
+                }
+            }
+        }
+    }
     pub fn close_pane(&mut self, id: RawFd) {
+        if self.terminals.get(&id).is_some() {
+            self.close_pane_without_rerender(id);
+            self.render();
+        }
+    }
+    pub fn close_pane_without_rerender(&mut self, id: RawFd) {
         if let Some(terminal_to_close) = &self.terminals.get(&id) {
             let terminal_to_close_width = terminal_to_close.display_cols;
             let terminal_to_close_height = terminal_to_close.display_rows;
@@ -999,7 +1027,6 @@ impl Screen {
                 return; // TODO: exit app? here we're trying to close the last pane on screen
             }
             self.terminals.remove(&id);
-            self.render();
         }
     }
     pub fn close_focused_pane(&mut self) {
diff --git a/src/tests/integration/basic.rs b/src/tests/integration/basic.rs
index ef122583..aae545b0 100644
--- a/src/tests/integration/basic.rs
+++ b/src/tests/integration/basic.rs
@@ -1,7 +1,7 @@
 use ::nix::pty::Winsize;
 use ::insta::assert_snapshot;
 
-use crate::start;
+use crate::{start, Opt};
 use crate::tests::fakes::{FakeInputOutput};
 use crate::tests::utils::get_output_frame_snapshots;
 
@@ -19,7 +19,7 @@ pub fn starts_with_one_terminal () {
     };
     let mut fake_input_output = get_fake_os_input(&fake_win_size);
     fake_input_output.add_terminal_input(&[17]); // quit (ctrl-q)
-    start(Box::new(fake_input_output.clone()));
+    start(Box::new(fake_input_output.clone()), Opt::default());
     let output_frames = fake_input_output.stdout_writer.output_frames.lock().unwrap();
     let snapshots = get_output_frame_snapshots(&output_frames, &fake_win_size);
     for snapshot in snapshots {
@@ -37,7 +37,7 @@ pub fn split_terminals_vertically() {
     };
     let mut fake_input_output = get_fake_os_input(&fake_win_size);
     fake_input_output.add_terminal_input(&[14, 17]); // split-vertically and quit (ctrl-n + ctrl-q)
-    start(Box::new(fake_input_output.clone()));
+    start(Box::new(fake_input_output.clone()), Opt::default());
     let output_frames = fake_input_output.stdout_writer.output_frames.lock().unwrap();
     let snapshots = get_output_frame_snapshots(&output_frames, &fake_win_size);
     for snapshot in snapshots {
@@ -55,7 +55,7 @@ pub fn split_terminals_horizontally() {
     };
     let mut fake_input_output = get_fake_os_input(&fake_win_size);
     fake_input_output.add_terminal_input(&[2, 17]); // split-horizontally and quit (ctrl-b + ctrl-q)
-    start(Box::new(fake_input_output.clone()));
+    start(Box::new(fake_input_output.clone()), Opt::default());
     let output_frames = fake_input_output.stdout_writer.output_frames.lock().unwrap();
     let snapshots = get_output_frame_snapshots(&output_frames, &fake_win_size);
     for snapshot in snapshots {
@@ -73,8 +73,8 @@ pub fn split_largest_terminal () {
         ws_ypixel: 0,
     };
     let mut fake_input_output = get_fake_os_input(&fake_win_size);
-    fake_input_output.add_terminal_input(&[13, 13, 13, 17]); // split-largest_terminal * 4 and quit (ctrl-m + ctrl-m + ctrl-m + ctrl-m + ctrl-q)
-    start(Box::new(fake_input_output.clone()));
+    fake_input_output.add_terminal_input(&[13, 13, 13, 17]); // split-largest_terminal * 3 and quit (ctrl-m + ctrl-m + ctrl-m + ctrl-m + ctrl-q)
+    start(Box::new(fake_input_output.clone()), Opt::default());
     let output_frames = fake_input_output.stdout_writer.output_frames.lock().unwrap();
     let snapshots = get_output_frame_snapshots(&output_frames, &fake_win_size);
     for snapshot in snapshots {
@@ -110,7 +110,7 @@ pub fn resize_right_and_up_on_the_same_axis() {
     // (ctrl-b + ctrl-n + ctrl-p + ctrl-n + ctrl-p * 2 + ctrl-l + ctrl-h + ctrl-k + ctrl-q)
     fake_input_output.add_terminal_input(&[2, 14, 16, 14, 16, 16, 12, 8, 11, 17]);
 
-    start(Box::new(fake_input_output.clone()));
+    start(Box::new(fake_input_output.clone()), Opt::default());
     let output_frames = fake_input_output.stdout_writer.output_frames.lock().unwrap();
     let snapshots = get_output_frame_snapshots(&output_frames, &fake_win_size);
     for snapshot in snapshots {
@@ -128,7 +128,29 @@ pub fn scrolling_inside_a_pane() {
     };
     let mut fake_input_output = get_fake_os_input(&fake_win_size);
     fake_input_output.add_terminal_input(&[2, 14, 27, 27, 29, 29, 17]); // split-horizontally, split-vertically, scroll up twice, scroll down twice and quit (ctrl-b + ctrl+[ * 2 + ctrl+] * 2, ctrl-q)
-    start(Box::new(fake_input_output.clone()));
+    start(Box::new(fake_input_output.clone()), Opt::default());
+    let output_frames = fake_input_output.stdout_writer.output_frames.lock().unwrap();
+    let snapshots = get_output_frame_snapshots(&output_frames, &fake_win_size);
+    for snapshot in snapshots {
+        assert_snapshot!(snapshot);
+    }
+}
+
+#[test]
+pub fn max_panes () {
+    // with the --max-panes option, we only allow a certain amount of panes on screen
+    // simultaneously, new panes beyond this limit will close older panes on screen
+    let fake_win_size = Winsize { // TODO: combine with above
+        ws_col: 121,
+        ws_row: 20,
+        ws_xpixel: 0,
+        ws_ypixel: 0,
+    };
+    let mut fake_input_output = get_fake_os_input(&fake_win_size);
+    fake_input_output.add_terminal_input(&[13, 13, 13, 13, 17]); // split-largest_terminal * 4 and quit (ctrl-m + ctrl-m + ctrl-m + ctrl-m + ctrl-q)
+    let mut opts = Opt::default();
+    opts.max_panes = Some(4);
+    start(Box::new(fake_input_output.clone()), opts);
     let output_frames = fake_input_output.stdout_writer.output_frames.lock().unwrap();
     let snapshots = get_output_frame_snapshots(&output_frames, &fake_win_size);
     for snapshot in snapshots {
diff --git a/src/tests/integration/close_pane.rs b/src/tests/integration/close_pane.rs
index 8d3b181c..09ee6a9d 100644
--- a/src/tests/integration/close_pane.rs
+++ b/src/tests/integration/close_pane.rs
@@ -1,7 +1,7 @@
 use ::nix::pty::Winsize;
 use ::insta::assert_snapshot;
 
-use crate::start;
+use crate::{start, Opt};
 use crate::tests::fakes::{FakeInputOutput};
 use crate::tests::utils::get_output_frame_snapshots;
 
@@ -27,7 +27,7 @@ pub fn close_pane_with_another_pane_above_it() {
     };
     let mut fake_input_output = get_fake_os_input(&fake_win_size);
     fake_input_output.add_terminal_input(&[2, 24, 17]); // split-horizontally, close focused pane and quit (ctrl-b + ctrl-x + ctrl-q)
-    start(Box::new(fake_input_output.clone()));
+    start(Box::new(fake_input_output.clone()), Opt::default());
 
     let output_frames = fake_input_output.stdout_writer.output_frames.lock().unwrap();
     let snapshots = get_output_frame_snapshots(&output_frames, &fake_win_size);
@@ -54,7 +54,7 @@ pub fn close_pane_with_another_pane_below_it() {
     };
     let mut fake_input_output = get_fake_os_input(&fake_win_size);
     fake_input_output.add_terminal_input(&[2, 16, 24, 17]); // split-horizontally, change-focus, close focused pane and quit (ctrl-b + ctrl-p + ctrl-x + ctrl-q)
-    start(Box::new(fake_input_output.clone()));
+    start(Box::new(fake_input_output.clone()), Opt::default());
 
     let output_frames = fake_input_output.stdout_writer.output_frames.lock().unwrap();
     let snapshots = get_output_frame_snapshots(&output_frames, &fake_win_size);
@@ -79,7 +79,7 @@ pub fn close_pane_with_another_pane_to_the_left() {
     };
     let mut fake_input_output = get_fake_os_input(&fake_win_size);
     fake_input_output.add_terminal_input(&[14, 24, 17]); // split-vertically, close focused pane and quit (ctrl-n + ctrl-x + ctrl-q)
-    start(Box::new(fake_input_output.clone()));
+    start(Box::new(fake_input_output.clone()), Opt::default());
 
     let output_frames = fake_input_output.stdout_writer.output_frames.lock().unwrap();
     let snapshots = get_output_frame_snapshots(&output_frames, &fake_win_size);
@@ -104,7 +104,7 @@ pub fn close_pane_with_another_pane_to_the_right() {
     };
     let mut fake_input_output = get_fake_os_input(&fake_win_size);
     fake_input_output.add_terminal_input(&[14, 16, 24, 17]); // split-vertically, change-focus, close focused pane and quit (ctrl-n + ctrl-p + ctrl-x + ctrl-q)
-    start(Box::new(fake_input_output.clone()));
+    start(Box::new(fake_input_output.clone()), Opt::default());
 
     let output_frames = fake_input_output.stdout_writer.output_frames.lock().unwrap();
     let snapshots = get_output_frame_snapshots(&output_frames, &fake_win_size);
@@ -133,7 +133,7 @@ pub fn close_pane_with_multiple_panes_above_it() {
     // split-horizontally, change-focus, split-vertically, change-focus * 2, close focused pane and quit
     // (ctrl-b + ctrl-p + ctrl-n + ctrl-p * 2 + ctrl-x + ctrl-q)
     fake_input_output.add_terminal_input(&[2, 16, 14, 16, 16, 24, 17]);
-    start(Box::new(fake_input_output.clone()));
+    start(Box::new(fake_input_output.clone()), Opt::default());
 
     let output_frames = fake_input_output.stdout_writer.output_frames.lock().unwrap();
     let snapshots = get_output_frame_snapshots(&output_frames, &fake_win_size);
@@ -162,7 +162,7 @@ pub fn close_pane_with_multiple_panes_below_it() {
     // split-horizontally, split-vertically, change-focus, change-focus, close focused pane and quit
     // (ctrl-b + ctrl-n + ctrl-p + ctrl-x + ctrl-q)
     fake_input_output.add_terminal_input(&[2, 14, 16, 24, 17]);
-    start(Box::new(fake_input_output.clone()));
+    start(Box::new(fake_input_output.clone()), Opt::default());
 
     let output_frames = fake_input_output.stdout_writer.output_frames.lock().unwrap();
     let snapshots = get_output_frame_snapshots(&output_frames, &fake_win_size);
@@ -191,7 +191,7 @@ pub fn close_pane_with_multiple_panes_to_the_left() {
     // split-vertically, change-focus, split-horizontally, change-focus * 2, close focused pane and quit
     // (ctrl-n + ctrl-p + ctrl-b + ctrl-p * 2 + ctrl-x + ctrl-q)
     fake_input_output.add_terminal_input(&[14, 16, 2, 16, 16, 24, 17]);
-    start(Box::new(fake_input_output.clone()));
+    start(Box::new(fake_input_output.clone()), Opt::default());
 
     let output_frames = fake_input_output.stdout_writer.output_frames.lock().unwrap();
     let snapshots = get_output_frame_snapshots(&output_frames, &fake_win_size);
@@ -220,7 +220,7 @@ pub fn close_pane_with_multiple_panes_to_the_right() {
     // split-vertically, change-focus, split-horizontally, change-focus * 2, close focused pane and quit
     // (ctrl-n + ctrl-p + ctrl-b + ctrl-p * 2 + ctrl-x + ctrl-q)
     fake_input_output.add_terminal_input(&[14, 2, 16, 24, 17]);
-    start(Box::new(fake_input_output.clone()));
+    start(Box::new(fake_input_output.clone()), Opt::default());
 
     let output_frames = fake_input_output.stdout_writer.output_frames.lock().unwrap();
     let snapshots = get_output_frame_snapshots(&output_frames, &fake_win_size);
@@ -252,7 +252,7 @@ pub fn close_pane_with_multiple_panes_above_it_away_from_screen_edges() {
     // (ctrl-b + ctrl-n + ctrl-n + ctrl-p + ctrl-n + ctrl-n + ctrl-k + ctrl-p + ctrl-k + ctrl-p * 4
     // + ctrl-n + ctrl-p * 3 + ctrl-x + ctrl-q)
     fake_input_output.add_terminal_input(&[2, 14, 14, 16, 14, 14, 11, 16, 11, 16, 16, 16, 16, 14, 16, 16, 16, 24, 17]);
-    start(Box::new(fake_input_output.clone()));
+    start(Box::new(fake_input_output.clone()), Opt::default());
 
     let output_frames = fake_input_output.stdout_writer.output_frames.lock().unwrap();
     let snapshots = get_output_frame_snapshots(&output_frames, &fake_win_size);
@@ -284,7 +284,7 @@ pub fn close_pane_with_multiple_panes_below_it_away_from_screen_edges() {
     // (ctrl-b + ctrl-n + ctrl-n + ctrl-p + ctrl-n + ctrl-n + ctrl-j + ctrl-p + ctrl-j + ctrl-p * 2
     // + ctrl-n + ctrl-p * 5 + ctrl-x + ctrl-q)
     fake_input_output.add_terminal_input(&[2, 14, 14, 16, 14, 14, 10, 16, 10, 16, 16, 14, 16, 16, 16, 16, 16, 24, 17]);
-    start(Box::new(fake_input_output.clone()));
+    start(Box::new(fake_input_output.clone()), Opt::default());
 
     let output_frames = fake_input_output.stdout_writer.output_frames.lock().unwrap();
     let snapshots = get_output_frame_snapshots(&output_frames, &fake_win_size);
@@ -319,7 +319,7 @@ pub fn close_pane_with_multiple_panes_to_the_left_away_from_screen_edges() {
     // (ctrl-n + ctrl-b + ctrl-b + ctrl-p + ctrl-b + ctrl-b + ctrl-h + ctrl-p + ctrl-h + ctrl-p * 4
     // + ctrl-b + ctrl-p * 3 + ctrl-x + ctrl-q)
     fake_input_output.add_terminal_input(&[14, 2, 2, 16, 2, 2, 8, 16, 8, 16, 16, 16, 16, 2, 16, 16, 16, 24, 17]);
-    start(Box::new(fake_input_output.clone()));
+    start(Box::new(fake_input_output.clone()), Opt::default());
 
     let output_frames = fake_input_output.stdout_writer.output_frames.lock().unwrap();
     let snapshots = get_output_frame_snapshots(&output_frames, &fake_win_size);
@@ -353,7 +353,7 @@ pub fn close_pane_with_multiple_panes_to_the_right_away_from_screen_edges() {
     // (ctrl-n + ctrl-b + ctrl-b + ctrl-p + ctrl-b + ctrl-b + ctrl-h + ctrl-p + ctrl-h + ctrl-p * 2
     // + ctrl-b + ctrl-p * 5 + ctrl-x + ctrl-q)
     fake_input_output.add_terminal_input(&[14, 2, 2, 16, 2, 2, 8, 16, 8, 16, 16, 2, 16, 16, 16, 16, 16, 24, 17]);
-    start(Box::new(fake_input_output.clone()));
+    start(Box::new(fake_input_output.clone()), Opt::default());
 
     let output_frames = fake_input_output.stdout_writer.output_frames.lock().unwrap();
     let snapshots = get_output_frame_snapshots(&output_frames, &fake_win_size);
diff --git a/src/tests/integration/compatibility.rs b/src/tests/integration/compatibility.rs
index cd04d354..74c58bac 100644
--- a/src/tests/integration/compatibility.rs
+++ b/src/tests/integration/compatibility.rs
@@ -2,7 +2,7 @@ use ::nix::pty::Winsize;
 use ::insta::assert_snapshot;
 use ::std::collections::HashMap;
 
-use crate::start;
+use crate::{start, Opt};
 use crate::tests::possible_tty_inputs::Bytes;
 use crate::tests::fakes::{FakeInputOutput};
 use crate::tests::utils::get_output_frame_snapshots;
@@ -38,7 +38,7 @@ pub fn run_bandwhich_from_fish_shell() {
     let fixture_name = "fish_and_bandwhich";
     let mut fake_input_output = get_fake_os_input(&fake_win_size, fixture_name);
     fake_input_output.add_terminal_input(&[17]); // quit (ctrl-q)
-    start(Box::new(fake_input_output.clone()));
+    start(Box::new(fake_input_output.clone()), Opt::default());
     let output_frames = fake_input_output.stdout_writer.output_frames.lock().unwrap();
     let snapshots = get_output_frame_snapshots(&output_frames, &fake_win_size);
     for snapshot in snapshots {
@@ -57,7 +57,7 @@ pub fn fish_tab_completion_options() {
     let fixture_name = "fish_tab_completion_options";
     let mut fake_input_output = get_fake_os_input(&fake_win_size, fixture_name);
     fake_input_output.add_terminal_input(&[17]); // quit (ctrl-q)
-    start(Box::new(fake_input_output.clone()));
+    start(Box::new(fake_input_output.clone()), Opt::default());
     let output_frames = fake_input_output.stdout_writer.output_frames.lock().unwrap();
     let snapshots = get_output_frame_snapshots(&output_frames, &fake_win_size);
     for snapshot in snapshots {
@@ -81,7 +81,7 @@ pub fn fish_select_tab_completion_options() {
     let fixture_name = "fish_select_tab_completion_options";
     let mut fake_input_output = get_fake_os_input(&fake_win_size, fixture_name);
     fake_input_output.add_terminal_input(&[17]); // quit (ctrl-q)
-    start(Box::new(fake_input_output.clone()));
+    start(Box::new(fake_input_output.clone()), Opt::default());
     let output_frames = fake_input_output.stdout_writer.output_frames.lock().unwrap();
     let snapshots = get_output_frame_snapshots(&output_frames, &fake_win_size);
     for snapshot in snapshots {
@@ -109,7 +109,7 @@ pub fn vim_scroll_region_down () {
     let fixture_name = "vim_scroll_region_down";
     let mut fake_input_output = get_fake_os_input(&fake_win_size, fixture_name);
     fake_input_output.add_terminal_input(&[17]); // quit (ctrl-q)
-    start(Box::new(fake_input_output.clone()));
+    start(Box::new(fake_input_output.clone()), Opt::default());
     let output_frames = fake_input_output.stdout_writer.output_frames.lock().unwrap();
     let snapshots = get_output_frame_snapshots(&output_frames, &fake_win_size);
     for snapshot in snapshots {
@@ -134,7 +134,7 @@ pub fn vim_ctrl_d() {
     let fixture_name = "vim_ctrl_d";
     let mut fake_input_output = get_fake_os_input(&fake_win_size, fixture_name);
     fake_input_output.add_terminal_input(&[17]); // quit (ctrl-q)
-    start(Box::new(fake_input_output.clone()));
+    start(Box::new(fake_input_output.clone()), Opt::default());
     let output_frames = fake_input_output.stdout_writer.output_frames.lock().unwrap();
     let snapshots = get_output_frame_snapshots(&output_frames, &fake_win_size);
     for snapshot in snapshots {
@@ -158,7 +158,7 @@ pub fn vim_ctrl_u() {
     let fixture_name = "vim_ctrl_u";
     let mut fake_input_output = get_fake_os_input(&fake_win_size, fixture_name);
     fake_input_output.add_terminal_input(&[17]); // quit (ctrl-q)
-    start(Box::new(fake_input_output.clone()));
+    start(Box::new(fake_input_output.clone()), Opt::default());
     let output_frames = fake_input_output.stdout_writer.output_frames.lock().unwrap();
     let snapshots = get_output_frame_snapshots(&output_frames, &fake_win_size);
     for snapshot in snapshots {
diff --git a/src/tests/integration/resize_down.rs b/src/tests/integration/resize_down.rs
index e2c2ac5d..ae925e89 100644
--- a/src/tests/integration/resize_down.rs
+++ b/src/tests/integration/resize_down.rs
@@ -1,7 +1,7 @@
 use ::nix::pty::Winsize;
 use ::insta::assert_snapshot;
 
-use crate::start;
+use crate::{start, Opt};
 use crate::tests::fakes::{FakeInputOutput};
 use crate::tests::utils::get_output_frame_snapshots;
 
@@ -28,7 +28,7 @@ pub fn resize_down_with_pane_above() {
     };
     let mut fake_input_output = get_fake_os_input(&fake_win_size);
     fake_input_output.add_terminal_input(&[2, 10, 17]); // split-horizontally, resize-down and quit (ctrl-b + ctrl-j + ctrl-q)
-    start(Box::new(fake_input_output.clone()));
+    start(Box::new(fake_input_output.clone()), Opt::default());
 
     let output_frames = fake_input_output.stdout_writer.output_frames.lock().unwrap();
     let snapshots = get_output_frame_snapshots(&output_frames, &fake_win_size);
@@ -55,7 +55,7 @@ pub fn resize_down_with_pane_below() {
     };
     let mut fake_input_output = get_fake_os_input(&fake_win_size);
     fake_input_output.add_terminal_input(&[2, 16, 10, 17]); // split-horizontally, change-focus, resize-down and quit (ctrl-b + ctrl-p + ctrl-j + ctrl-q)
-    start(Box::new(fake_input_output.clone()));
+    start(Box::new(fake_input_output.clone()), Opt::default());
 
     let output_frames = fake_input_output.stdout_writer.output_frames.lock().unwrap();
     let snapshots = get_output_frame_snapshots(&output_frames, &fake_win_size);
@@ -86,7 +86,7 @@ pub fn resize_down_with_panes_above_and_below() {
     let mut fake_input_output = get_fake_os_input(&fake_win_size);
     // split-horizontally * 2, change-focus * 2, resize-down and quit (ctrl-n * 2 + ctrl-p * 2 + ctrl-j + ctrl-q)
     fake_input_output.add_terminal_input(&[2, 2, 16, 16, 10, 17]);
-    start(Box::new(fake_input_output.clone()));
+    start(Box::new(fake_input_output.clone()), Opt::default());
 
     let output_frames = fake_input_output.stdout_writer.output_frames.lock().unwrap();
     let snapshots = get_output_frame_snapshots(&output_frames, &fake_win_size);
@@ -116,7 +116,7 @@ pub fn resize_down_with_multiple_panes_above() {
     // (ctrl-b + ctrl-p + ctrl-n + ctrl-p * 2 + ctrl-j + ctrl-q)
     fake_input_output.add_terminal_input(&[2, 16, 14, 16, 16, 10, 17]);
 
-    start(Box::new(fake_input_output.clone()));
+    start(Box::new(fake_input_output.clone()), Opt::default());
 
     let output_frames = fake_input_output.stdout_writer.output_frames.lock().unwrap();
     let snapshots = get_output_frame_snapshots(&output_frames, &fake_win_size);
@@ -146,7 +146,7 @@ pub fn resize_down_with_panes_above_aligned_left_with_current_pane() {
     // (ctrl-n + ctrl-b + ctrl-p + ctrl-b + ctrl-p * 3, ctrl-j + ctrl-q)
     fake_input_output.add_terminal_input(&[14, 2, 16, 2, 16, 16, 16, 10, 17]);
 
-    start(Box::new(fake_input_output.clone()));
+    start(Box::new(fake_input_output.clone()), Opt::default());
 
     let output_frames = fake_input_output.stdout_writer.output_frames.lock().unwrap();
     let snapshots = get_output_frame_snapshots(&output_frames, &fake_win_size);
@@ -176,7 +176,7 @@ pub fn resize_down_with_panes_below_aligned_left_with_current_pane() {
     // (ctrl-n + ctrl-b + ctrl-p + ctrl-b + ctrl-p + ctrl-p + ctrl-j + ctrl-q)
     fake_input_output.add_terminal_input(&[14, 2, 16, 2, 16, 16, 10, 17]);
 
-    start(Box::new(fake_input_output.clone()));
+    start(Box::new(fake_input_output.clone()), Opt::default());
 
     let output_frames = fake_input_output.stdout_writer.output_frames.lock().unwrap();
     let snapshots = get_output_frame_snapshots(&output_frames, &fake_win_size);
@@ -206,7 +206,7 @@ pub fn resize_down_with_panes_above_aligned_right_with_current_pane() {
     // (ctrl-n + ctrl-b + ctrl-p + ctrl-b + ctrl-j + ctrl-q)
     fake_input_output.add_terminal_input(&[14, 2, 16, 2, 10, 17]);
 
-    start(Box::new(fake_input_output.clone()));
+    start(Box::new(fake_input_output.clone()), Opt::default());
 
     let output_frames = fake_input_output.stdout_writer.output_frames.lock().unwrap();
     let snapshots = get_output_frame_snapshots(&output_frames, &fake_win_size);
@@ -237,7 +237,7 @@ pub fn resize_down_with_panes_below_aligned_right_with_current_pane() {
     // (ctrl-n + ctrl-b + ctrl-p + ctrl-b + ctrl-p, ctrl-j + ctrl-q)
     fake_input_output.add_terminal_input(&[14, 2, 16, 2, 16, 10, 17]);
 
-    start(Box::new(fake_input_output.clone()));
+    start(Box::new(fake_input_output.clone()), Opt::default());
 
     let output_frames = fake_input_output.stdout_writer.output_frames.lock().unwrap();
     let snapshots = get_output_frame_snapshots(&output_frames, &fake_win_size);
@@ -267,7 +267,7 @@ pub fn resize_down_with_panes_above_aligned_left_and_right_with_current_pane() {
     // (ctrl-n * 2 + ctrl-b + ctrl-p + ctrl-b + ctrl-p * 2 + ctrl-b + ctrl-j + ctrl-q)
     fake_input_output.add_terminal_input(&[14, 14, 2, 16, 2, 16, 16, 2, 10, 17]);
 
-    start(Box::new(fake_input_output.clone()));
+    start(Box::new(fake_input_output.clone()), Opt::default());
 
     let output_frames = fake_input_output.stdout_writer.output_frames.lock().unwrap();
     let snapshots = get_output_frame_snapshots(&output_frames, &fake_win_size);
@@ -297,7 +297,7 @@ pub fn resize_down_with_panes_below_aligned_left_and_right_with_current_pane() {
     // (ctrl-n * 2 + ctrl-b + ctrl-p + ctrl-b + ctrl-p * 2 + ctrl-b + ctrl-p * 2 + ctrl-j + ctrl-q)
     fake_input_output.add_terminal_input(&[14, 14, 2, 16, 2, 16, 16, 2, 16, 16, 10, 17]);
 
-    start(Box::new(fake_input_output.clone()));
+    start(Box::new(fake_input_output.clone()), Opt::default());
 
     let output_frames = fake_input_output.stdout_writer.output_frames.lock().unwrap();
     let snapshots = get_output_frame_snapshots(&output_frames, &fake_win_size);
@@ -328,7 +328,7 @@ pub fn resize_down_with_panes_above_aligned_left_and_right_with_panes_to_the_lef
     // ctrl-n * 2 + ctrl-p * 6 + ctrl-h * 2 + ctrl-p + ctrl-j + ctrl-q)
     fake_input_output.add_terminal_input(&[14, 14, 16, 8, 8, 8, 2, 16, 16, 16, 2, 16, 16, 2, 14, 14, 16, 16, 16, 16, 16, 16, 8, 8, 16, 10, 17]);
 
-    start(Box::new(fake_input_output.clone()));
+    start(Box::new(fake_input_output.clone()), Opt::default());
 
     let output_frames = fake_input_output.stdout_writer.output_frames.lock().unwrap();
     let snapshots = get_output_frame_snapshots(&output_frames, &fake_win_size);
@@ -360,7 +360,7 @@ pub fn resize_down_with_panes_below_aligned_left_and_right_with_to_the_left_and_
     // ctrl-n * 2 + ctrl-p * 2 + ctrl-h * 2 + ctrl-p * 5 + ctrl-j + ctrl-q)
     fake_input_output.add_terminal_input(&[14, 14, 16, 8, 8, 8, 2, 16, 16, 16, 2, 16, 16, 2, 16, 16, 14, 14, 16, 16, 8, 8, 16, 16, 16, 16, 16, 10, 17]);
 
-    start(Box::new(fake_input_output.clone()));
+    start(Box::new(fake_input_output.clone()), Opt::default());
 
     let output_frames = fake_input_output.stdout_writer.output_frames.lock().unwrap();
     let snapshots = get_output_frame_snapshots(&output_frames, &fake_win_size);
diff --git a/src/tests/integration/resize_left.rs b/src/tests/integration/resize_left.rs
index bff82e3e..2039c0a4 100644
--- a/src/tests/integration/resize_left.rs
+++ b/src/tests/integration/resize_left.rs
@@ -1,7 +1,7 @@
 use ::nix::pty::Winsize;
 use ::insta::assert_snapshot;
 
-use crate::start;
+use crate::{start, Opt};
 use crate::tests::fakes::{FakeInputOutput};
 use crate::tests::utils::get_output_frame_snapshots;
 
@@ -25,7 +25,7 @@ pub fn resize_left_with_pane_to_the_left() {
     };
     let mut fake_input_output = get_fake_os_input(&fake_win_size);
     fake_input_output.add_terminal_input(&[14, 8, 17]); // split-vertically, resize-left and quit (ctrl-n + ctrl-h + ctrl-q)
-    start(Box::new(fake_input_output.clone()));
+    start(Box::new(fake_input_output.clone()), Opt::default());
 
     let output_frames = fake_input_output.stdout_writer.output_frames.lock().unwrap();
     let snapshots = get_output_frame_snapshots(&output_frames, &fake_win_size);
@@ -50,7 +50,7 @@ pub fn resize_left_with_pane_to_the_right() {
     };
     let mut fake_input_output = get_fake_os_input(&fake_win_size);
     fake_input_output.add_terminal_input(&[14, 16, 8, 17]); // split-vertically, change-focus resize-left and quit (ctrl-n + ctrl-p + ctrl-h + ctrl-q)
-    start(Box::new(fake_input_output.clone()));
+    start(Box::new(fake_input_output.clone()), Opt::default());
 
     let output_frames = fake_input_output.stdout_writer.output_frames.lock().unwrap();
     let snapshots = get_output_frame_snapshots(&output_frames, &fake_win_size);
@@ -76,7 +76,7 @@ pub fn resize_left_with_panes_to_the_left_and_right() {
     let mut fake_input_output = get_fake_os_input(&fake_win_size);
     // split-vertically * 2, change-focus * 2, resize-right and quit (ctrl-n * 2 + ctrl-p * 2 + ctrl-h + ctrl-q)
     fake_input_output.add_terminal_input(&[14, 14, 16, 16, 8, 17]);
-    start(Box::new(fake_input_output.clone()));
+    start(Box::new(fake_input_output.clone()), Opt::default());
 
     let output_frames = fake_input_output.stdout_writer.output_frames.lock().unwrap();
     let snapshots = get_output_frame_snapshots(&output_frames, &fake_win_size);
@@ -104,7 +104,7 @@ pub fn resize_left_with_multiple_panes_to_the_left() {
     // (ctrl-n + ctrl-p + ctrl-b + ctrl-p * 2 + ctrl-h + ctrl-q)
     fake_input_output.add_terminal_input(&[14, 16, 2, 16, 16, 8, 17]);
 
-    start(Box::new(fake_input_output.clone()));
+    start(Box::new(fake_input_output.clone()), Opt::default());
 
     let output_frames = fake_input_output.stdout_writer.output_frames.lock().unwrap();
     let snapshots = get_output_frame_snapshots(&output_frames, &fake_win_size);
@@ -132,7 +132,7 @@ pub fn resize_left_with_panes_to_the_left_aligned_top_with_current_pane() {
     // (ctrl-n + ctrl-b + ctrl-p + ctrl-b + ctrl-p * 3, ctrl-h + ctrl-q)
     fake_input_output.add_terminal_input(&[14, 2, 16, 2, 16, 16, 16, 8, 17]);
 
-    start(Box::new(fake_input_output.clone()));
+    start(Box::new(fake_input_output.clone()), Opt::default());
 
     let output_frames = fake_input_output.stdout_writer.output_frames.lock().unwrap();
     let snapshots = get_output_frame_snapshots(&output_frames, &fake_win_size);
@@ -160,7 +160,7 @@ pub fn resize_left_with_panes_to_the_right_aligned_top_with_current_pane() {
     // (ctrl-n + ctrl-b + ctrl-p + ctrl-b + ctrl-h + ctrl-q)
     fake_input_output.add_terminal_input(&[14, 2, 16, 2, 8, 17]);
 
-    start(Box::new(fake_input_output.clone()));
+    start(Box::new(fake_input_output.clone()), Opt::default());
 
     let output_frames = fake_input_output.stdout_writer.output_frames.lock().unwrap();
     let snapshots = get_output_frame_snapshots(&output_frames, &fake_win_size);
@@ -188,7 +188,7 @@ pub fn resize_left_with_panes_to_the_left_aligned_bottom_with_current_pane() {
     // (ctrl-n + ctrl-b + ctrl-p + ctrl-b + ctrl-p * 2, ctrl-h + ctrl-q)
     fake_input_output.add_terminal_input(&[14, 2, 16, 2, 16, 16, 8, 17]);
 
-    start(Box::new(fake_input_output.clone()));
+    start(Box::new(fake_input_output.clone()), Opt::default());
 
     let output_frames = fake_input_output.stdout_writer.output_frames.lock().unwrap();
     let snapshots = get_output_frame_snapshots(&output_frames, &fake_win_size);
@@ -217,7 +217,7 @@ pub fn resize_left_with_panes_to_the_right_aligned_bottom_with_current_pane() {
     // (ctrl-n + ctrl-b + ctrl-p + ctrl-b + ctrl-p, ctrl-h + ctrl-q)
     fake_input_output.add_terminal_input(&[14, 2, 16, 2, 16, 8, 17]);
 
-    start(Box::new(fake_input_output.clone()));
+    start(Box::new(fake_input_output.clone()), Opt::default());
 
     let output_frames = fake_input_output.stdout_writer.output_frames.lock().unwrap();
     let snapshots = get_output_frame_snapshots(&output_frames, &fake_win_size);
@@ -247,7 +247,7 @@ pub fn resize_left_with_panes_to_the_left_aligned_top_and_bottom_with_current_pa
     // (ctrl-b * 2 + ctrl-n + ctrl-p + ctrl-n + ctrl-p * 2 + ctrl-n + ctrl-h + ctrl-q)
     fake_input_output.add_terminal_input(&[2, 2, 14, 16, 14, 16, 16, 14, 8, 17]);
 
-    start(Box::new(fake_input_output.clone()));
+    start(Box::new(fake_input_output.clone()), Opt::default());
 
     let output_frames = fake_input_output.stdout_writer.output_frames.lock().unwrap();
     let snapshots = get_output_frame_snapshots(&output_frames, &fake_win_size);
@@ -277,7 +277,7 @@ pub fn resize_left_with_panes_to_the_right_aligned_top_and_bottom_with_current_p
     // (ctrl-b * 2 + ctrl-n + ctrl-p + ctrl-n + ctrl-p * 2 + ctrl-n + ctrl-p * 2 + ctrl-h + ctrl-q)
     fake_input_output.add_terminal_input(&[2, 2, 14, 16, 14, 16, 16, 14, 16, 16, 8, 17]);
 
-    start(Box::new(fake_input_output.clone()));
+    start(Box::new(fake_input_output.clone()), Opt::default());
 
     let output_frames = fake_input_output.stdout_writer.output_frames.lock().unwrap();
     let snapshots = get_output_frame_snapshots(&output_frames, &fake_win_size);
@@ -308,7 +308,7 @@ pub fn resize_left_with_panes_to_the_left_aligned_top_and_bottom_with_panes_abov
     // ctrl-b * 2 + ctrl-p * 7 + ctrl-k * 2 + ctrl-h + ctrl-q)
     fake_input_output.add_terminal_input(&[2, 2, 16, 11, 11, 11, 14, 16, 16, 16, 14, 16, 16, 14, 2, 2, 16, 16, 16, 16, 16, 16, 16, 11, 11, 8, 17]);
 
-    start(Box::new(fake_input_output.clone()));
+    start(Box::new(fake_input_output.clone()), Opt::default());
 
     let output_frames = fake_input_output.stdout_writer.output_frames.lock().unwrap();
     let snapshots = get_output_frame_snapshots(&output_frames, &fake_win_size);
@@ -340,7 +340,7 @@ pub fn resize_left_with_panes_to_the_right_aligned_top_and_bottom_with_panes_abo
     // ctrl-b * 2 + ctrl-p * 7 + ctrl-k * 2 + ctrl-h + ctrl-q)
     fake_input_output.add_terminal_input(&[2, 2, 16, 11, 11, 11, 14, 16, 16, 16, 14, 16, 16, 14, 16, 16, 2, 2, 16, 16, 16, 16, 16, 16, 16, 11, 11, 8, 17]);
 
-    start(Box::new(fake_input_output.clone()));
+    start(Box::new(fake_input_output.clone()), Opt::default());
 
     let output_frames = fake_input_output.stdout_writer.output_frames.lock().unwrap();
     let snapshots = get_output_frame_snapshots(&output_frames, &fake_win_size);
diff --git a/src/tests/integration/resize_right.rs b/src/tests/integration/resize_right.rs
index a8dbf5b3..6a11a0e8 100644
--- a/src/tests/integration/resize_right.rs
+++ b/src/tests/integration/resize_right.rs
@@ -1,7 +1,7 @@
 use ::nix::pty::Winsize;
 use ::insta::assert_snapshot;
 
-use crate::start;
+use crate::{start, Opt};
 use crate::tests::fakes::{FakeInputOutput};
 use crate::tests::utils::get_output_frame_snapshots;
 
@@ -25,7 +25,7 @@ pub fn resize_right_with_pane_to_the_left() {
     };
     let mut fake_input_output = get_fake_os_input(&fake_win_size);
     fake_input_output.add_terminal_input(&[14, 12, 17]); // split-vertically, resize-right and quit (ctrl-n + ctrl-l + ctrl-q)
-    start(Box::new(fake_input_output.clone()));
+    start(Box::new(fake_input_output.clone()), Opt::default());
 
     let output_frames = fake_input_output.stdout_writer.output_frames.lock().unwrap();
     let snapshots = get_output_frame_snapshots(&output_frames, &fake_win_size);
@@ -50,7 +50,7 @@ pub fn resize_right_with_pane_to_the_right() {
     };
     let mut fake_input_output = get_fake_os_input(&fake_win_size);
     fake_input_output.add_terminal_input(&[14, 16, 12, 17]); // split-vertically, change-focus resize-right and quit (ctrl-n + ctrl-p + ctrl-l + ctrl-q)
-    start(Box::new(fake_input_output.clone()));
+    start(Box::new(fake_input_output.clone()), Opt::default());
 
     let output_frames = fake_input_output.stdout_writer.output_frames.lock().unwrap();
     let snapshots = get_output_frame_snapshots(&output_frames, &fake_win_size);
@@ -76,7 +76,7 @@ pub fn resize_right_with_panes_to_the_left_and_right() {
     let mut fake_input_output = get_fake_os_input(&fake_win_size);
     // split-vertically * 2, change-focus * 2, resize-right and quit (ctrl-n * 2 + ctrl-p * 2 + ctrl-l + ctrl-q)
     fake_input_output.add_terminal_input(&[14, 14, 16, 16, 12, 17]);
-    start(Box::new(fake_input_output.clone()));
+    start(Box::new(fake_input_output.clone()), Opt::default());
 
     let output_frames = fake_input_output.stdout_writer.output_frames.lock().unwrap();
     let snapshots = get_output_frame_snapshots(&output_frames, &fake_win_size);
@@ -104,7 +104,7 @@ pub fn resize_right_with_multiple_panes_to_the_left() {
     // (ctrl-n + ctrl-p + ctrl-b + ctrl-p * 2 + ctrl-l + ctrl-q)
     fake_input_output.add_terminal_input(&[14, 16, 2, 16, 16, 12, 17]);
 
-    start(Box::new(fake_input_output.clone()));
+    start(Box::new(fake_input_output.clone()), Opt::default());
 
     let output_frames = fake_input_output.stdout_writer.output_frames.lock().unwrap();
     let snapshots = get_output_frame_snapshots(&output_frames, &fake_win_size);
@@ -132,7 +132,7 @@ pub fn resize_right_with_panes_to_the_left_aligned_top_with_current_pane() {
     // (ctrl-n + ctrl-b + ctrl-p + ctrl-b + ctrl-p * 3, ctrl-l + ctrl-q)
     fake_input_output.add_terminal_input(&[14, 2, 16, 2, 16, 16, 16, 12, 17]);
 
-    start(Box::new(fake_input_output.clone()));
+    start(Box::new(fake_input_output.clone()), Opt::default());
 
     let output_frames = fake_input_output.stdout_writer.output_frames.lock().unwrap();
     let snapshots = get_output_frame_snapshots(&output_frames, &fake_win_size);
@@ -160,7 +160,7 @@ pub fn resize_right_with_panes_to_the_right_aligned_top_with_current_pane() {
     // (ctrl-n + ctrl-b + ctrl-p + ctrl-b + ctrl-l + ctrl-q)
     fake_input_output.add_terminal_input(&[14, 2, 16, 2, 12, 17]);
 
-    start(Box::new(fake_input_output.clone()));
+    start(Box::new(fake_input_output.clone()), Opt::default());
 
     let output_frames = fake_input_output.stdout_writer.output_frames.lock().unwrap();
     let snapshots = get_output_frame_snapshots(&output_frames, &fake_win_size);
@@ -188,7 +188,7 @@ pub fn resize_right_with_panes_to_the_left_aligned_bottom_with_current_pane() {
     // (ctrl-n + ctrl-b + ctrl-p + ctrl-b + ctrl-p * 2, ctrl-l + ctrl-q)
     fake_input_output.add_terminal_input(&[14, 2, 16, 2, 16, 16, 12, 17]);
 
-    start(Box::new(fake_input_output.clone()));
+    start(Box::new(fake_input_output.clone()), Opt::default());
 
     let output_frames = fake_input_output.stdout_writer.output_frames.lock().unwrap();
     let snapshots = get_output_frame_snapshots(&output_frames, &fake_win_size);
@@ -217,7 +217,7 @@ pub fn resize_right_with_panes_to_the_right_aligned_bottom_with_current_pane() {
     // (ctrl-n + ctrl-b + ctrl-p + ctrl-b + ctrl-p, ctrl-l + ctrl-q)
     fake_input_output.add_terminal_input(&[14, 2, 16, 2, 16, 12, 17]);
 
-    start(Box::new(fake_input_output.clone()));
+    start(Box::new(fake_input_output.clone()), Opt::default());
 
     let output_frames = fake_input_output.stdout_writer.output_frames.lock().unwrap();
     let snapshots = get_output_frame_snapshots(&output_frames, &fake_win_size);
@@ -247,7 +247,7 @@ pub fn resize_right_with_panes_to_the_left_aligned_top_and_bottom_with_current_p
     // (ctrl-b * 2 + ctrl-n + ctrl-p + ctrl-n + ctrl-p * 2 + ctrl-n + ctrl-l + ctrl-q)
     fake_input_output.add_terminal_input(&[2, 2, 14, 16, 14, 16, 16, 14, 12, 17]);
 
-    start(Box::new(fake_input_output.clone()));
+    start(Box::new(fake_input_output.clone()), Opt::default());
 
     let output_frames = fake_input_output.stdout_writer.output_frames.lock().unwrap();
     let snapshots = get_output_frame_snapshots(&output_frames, &fake_win_size);
@@ -277,7 +277,7 @@ pub fn resize_right_with_panes_to_the_right_aligned_top_and_bottom_with_current_
     // (ctrl-b * 2 + ctrl-n + ctrl-p + ctrl-n + ctrl-p * 2 + ctrl-n + ctrl-p * 2 + ctrl-l + ctrl-q)
     fake_input_output.add_terminal_input(&[2, 2, 14, 16, 14, 16, 16, 14, 16, 16, 12, 17]);
 
-    start(Box::new(fake_input_output.clone()));
+    start(Box::new(fake_input_output.clone()), Opt::default());
 
     let output_frames = fake_input_output.stdout_writer.output_frames.lock().unwrap();
     let snapshots = get_output_frame_snapshots(&output_frames, &fake_win_size);
@@ -308,7 +308,7 @@ pub fn resize_right_with_panes_to_the_left_aligned_top_and_bottom_with_panes_abo
     // ctrl-b * 2 + ctrl-p * 7 + ctrl-k * 2 + ctrl-l + ctrl-q)
     fake_input_output.add_terminal_input(&[2, 2, 16, 11, 11, 11, 14, 16, 16, 16, 14, 16, 16, 14, 2, 2, 16, 16, 16, 16, 16, 16, 16, 11, 11, 12, 17]);
 
-    start(Box::new(fake_input_output.clone()));
+    start(Box::new(fake_input_output.clone()), Opt::default());
 
     let output_frames = fake_input_output.stdout_writer.output_frames.lock().unwrap();
     let snapshots = get_output_frame_snapshots(&output_frames, &fake_win_size);
@@ -340,7 +340,7 @@ pub fn resize_right_with_panes_to_the_right_aligned_top_and_bottom_with_panes_ab
     // ctrl-b * 2 + ctrl-p * 7 + ctrl-k * 2 + ctrl-l + ctrl-q)
     fake_input_output.add_terminal_input(&[2, 2, 16, 11, 11, 11, 14, 16, 16, 16, 14, 16, 16, 14, 16, 16, 2, 2, 16, 16, 16, 16, 16, 16, 16, 11, 11, 12, 17]);
 
-    start(Box::new(fake_input_output.clone()));
+    start(Box::new(fake_input_output.clone()), Opt::default());
 
     let output_frames = fake_input_output.stdout_writer.output_frames.lock().unwrap();
     let snapshots = get_output_frame_snapshots(&output_frames, &fake_win_size);
diff --git a/src/tests/integration/resize_up.rs b/src/tests/integration/resize_up.rs
index 35bca0b5..e7a76727 100644
--- a/src/tests/integration/resize_up.rs
+++ b/src/tests/integration/resize_up.rs
@@ -1,7 +1,7 @@
 use ::nix::pty::Winsize;
 use ::insta::assert_snapshot;
 
-use crate::start;
+use crate::{start, Opt};
 use crate::tests::fakes::{FakeInputOutput};
 use crate::tests::utils::get_output_frame_snapshots;
 
@@ -27,7 +27,7 @@ pub fn resize_up_with_pane_above() {
     };
     let mut fake_input_output = get_fake_os_input(&fake_win_size);
     fake_input_output.add_terminal_input(&[2, 11, 17]); // split-horizontally, resize-up and quit (ctrl-b + ctrl-k + ctrl-q)
-    start(Box::new(fake_input_output.clone()));
+    start(Box::new(fake_input_output.clone()), Opt::default());
 
     let output_frames = fake_input_output.stdout_writer.output_frames.lock().unwrap();
     let snapshots = get_output_frame_snapshots(&output_frames, &fake_win_size);
@@ -54,7 +54,7 @@ pub fn resize_up_with_pane_below() {
     };
     let mut fake_input_output = get_fake_os_input(&fake_win_size);
     fake_input_output.add_terminal_input(&[2, 16, 11, 17]); // split-horizontally, change-focus, resize-up and quit (ctrl-b + ctrl-p + ctrl-k + ctrl-q)
-    start(Box::new(fake_input_output.clone()));
+    start(Box::new(fake_input_output.clone()), Opt::default());
 
     let output_frames = fake_input_output.stdout_writer.output_frames.lock().unwrap();
     let snapshots = get_output_frame_snapshots(&output_frames, &fake_win_size);
@@ -85,7 +85,7 @@ pub fn resize_up_with_panes_above_and_below() {
     let mut fake_input_output = get_fake_os_input(&fake_win_size);
     // split-horizontally * 2, change-focus * 2, resize-up and quit (ctrl-n * 2 + ctrl-p * 2 + ctrl-h + ctrl-q)
     fake_input_output.add_terminal_input(&[2, 2, 16, 16, 11, 17]);
-    start(Box::new(fake_input_output.clone()));
+    start(Box::new(fake_input_output.clone()), Opt::default());
 
     let output_frames = fake_input_output.stdout_writer.output_frames.lock().unwrap();
     let snapshots = get_output_frame_snapshots(&output_frames, &fake_win_size);
@@ -114,7 +114,7 @@ pub fn resize_up_with_multiple_panes_above() {
     // (ctrl-b + ctrl-p + ctrl-n + ctrl-p * 2 + ctrl-k + ctrl-q)
     fake_input_output.add_terminal_input(&[2, 16, 14, 16, 16, 11, 17]);
 
-    start(Box::new(fake_input_output.clone()));
+    start(Box::new(fake_input_output.clone()), Opt::default());
 
     let output_frames = fake_input_output.stdout_writer.output_frames.lock().unwrap();
     let snapshots = get_output_frame_snapshots(&output_frames, &fake_win_size);
@@ -142,7 +142,7 @@ pub fn resize_up_with_panes_above_aligned_left_with_current_pane() {
     // (ctrl-n + ctrl-b + ctrl-p + ctrl-b + ctrl-p * 3, ctrl-k + ctrl-q)
     fake_input_output.add_terminal_input(&[14, 2, 16, 2, 16, 16, 16, 11, 17]);
 
-    start(Box::new(fake_input_output.clone()));
+    start(Box::new(fake_input_output.clone()), Opt::default());
 
     let output_frames = fake_input_output.stdout_writer.output_frames.lock().unwrap();
     let snapshots = get_output_frame_snapshots(&output_frames, &fake_win_size);
@@ -172,7 +172,7 @@ pub fn resize_up_with_panes_below_aligned_left_with_current_pane() {
     // (ctrl-n + ctrl-b + ctrl-p + ctrl-b + ctrl-p + ctrl-p + ctrl-k + ctrl-q)
     fake_input_output.add_terminal_input(&[14, 2, 16, 2, 16, 16, 11, 17]);
 
-    start(Box::new(fake_input_output.clone()));
+    start(Box::new(fake_input_output.clone()), Opt::default());
 
     let output_frames = fake_input_output.stdout_writer.output_frames.lock().unwrap();
     let snapshots = get_output_frame_snapshots(&output_frames, &fake_win_size);
@@ -202,7 +202,7 @@ pub fn resize_up_with_panes_above_aligned_right_with_current_pane() {
     // (ctrl-n + ctrl-b + ctrl-p + ctrl-b + ctrl-k + ctrl-q)
     fake_input_output.add_terminal_input(&[14, 2, 16, 2, 11, 17]);
 
-    start(Box::new(fake_input_output.clone()));
+    start(Box::new(fake_input_output.clone()), Opt::default());
 
     let output_frames = fake_input_output.stdout_writer.output_frames.lock().unwrap();
     let snapshots = get_output_frame_snapshots(&output_frames, &fake_win_size);
@@ -233,7 +233,7 @@ pub fn resize_up_with_panes_below_aligned_right_with_current_pane() {
     // (ctrl-n + ctrl-b + ctrl-p + ctrl-b + ctrl-p, ctrl-k + ctrl-q)
     fake_input_output.add_terminal_input(&[14, 2, 16, 2, 16, 11, 17]);
 
-    start(Box::new(fake_input_output.clone()));
+    start(Box::new(fake_input_output.clone()), Opt::default());
 
     let output_frames = fake_input_output.stdout_writer.output_frames.lock().unwrap();
     let snapshots = get_output_frame_snapshots(&output_frames, &fake_win_size);
@@ -263,7 +263,7 @@ pub fn resize_up_with_panes_above_aligned_left_and_right_with_current_pane() {
     // (ctrl-n * 2 + ctrl-b + ctrl-p + ctrl-b + ctrl-p * 2 + ctrl-b + ctrl-k + ctrl-q)
     fake_input_output.add_terminal_input(&[14, 14, 2, 16, 2, 16, 16, 2, 11, 17]);
 
-    start(Box::new(fake_input_output.clone()));
+    start(Box::new(fake_input_output.clone()), Opt::default());
 
     let output_frames = fake_input_output.stdout_writer.output_frames.lock().unwrap();
     let snapshots = get_output_frame_snapshots(&output_frames, &fake_win_size);
@@ -293,7 +293,7 @@ pub fn resize_up_with_panes_below_aligned_left_and_right_with_current_pane() {
     // (ctrl-n * 2 + ctrl-b + ctrl-p + ctrl-b + ctrl-p * 2 + ctrl-b + ctrl-p * 2 + ctrl-k + ctrl-q)
     fake_input_output.add_terminal_input(&[14, 14, 2, 16, 2, 16, 16, 2, 16, 16, 11, 17]);
 
-    start(Box::new(fake_input_output.clone()));
+    start(Box::new(fake_input_output.clone()), Opt::default());
 
     let output_frames = fake_input_output.stdout_writer.output_frames.lock().unwrap();
     let snapshots = get_output_frame_snapshots(&output_frames, &fake_win_size);
@@ -324,7 +324,7 @@ pub fn resize_up_with_panes_above_aligned_left_and_right_with_panes_to_the_left_
     // ctrl-n * 2 + ctrl-p * 6 + ctrl-h * 2 + ctrl-p + ctrl-k + ctrl-q)
     fake_input_output.add_terminal_input(&[14, 14, 16, 8, 8, 8, 2, 16, 16, 16, 2, 16, 16, 2, 14, 14, 16, 16, 16, 16, 16, 16, 8, 8, 16, 11, 17]);
 
-    start(Box::new(fake_input_output.clone()));
+    start(Box::new(fake_input_output.clone()), Opt::default());
 
     let output_frames = fake_input_output.stdout_writer.output_frames.lock().unwrap();
     let snapshots = get_output_frame_snapshots(&output_frames, &fake_win_size);
@@ -356,7 +356,7 @@ pub fn resize_up_with_panes_below_aligned_left_and_right_with_to_the_left_and_ri
     // ctrl-n * 2 + ctrl-p * 2 + ctrl-h * 2 + ctrl-p * 5 + ctrl-k + ctrl-q)
     fake_input_output.add_terminal_input(&[14, 14, 16, 8, 8, 8, 2, 16, 16, 16, 2, 16, 16, 2, 16, 16, 14, 14, 16, 16, 8, 8, 16, 16, 16, 16, 16, 11, 17]);
 
-    start(Box::new(fake_input_output.clone()));
+    start(Box::new(fake_input_output.clone()), Opt::default());
 
     let output_frames = fake_input_output.stdout_writer.output_frames.lock().unwrap();
     let snapshots = get_output_frame_snapshots(&output_frames, &fake_win_size);
diff --git a/src/tests/integration/snapshots/mosaic__tests__integration__basic__max_panes-10.snap b/src/tests/integration/snapshots/mosaic__tests__integration__basic__max_panes-10.snap
new file mode 100644
index 00000000..fa8c19b2
--- /dev/null
+++ b/src/tests/integration/snapshots/mosaic__tests__integration__basic__max_panes-10.snap
@@ -0,0 +1,24 @@
+---
+source: src/tests/integration/basic.rs
+expression: snapshot
+---
+line12-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb│line12-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
+line13-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb│line13-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
+line14-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb│line14-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
+line15-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb│line15-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
+line16-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb│line16-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
+line17-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb│line17-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
+line18-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb│line18-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
+line19-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb│line19-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
+prompt $                                                    │prompt $                                                    
+────────────────────────────────────────────────────────────┼────────────────────────────────────────────────────────────
+line12-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb│line12-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
+line13-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb│line13-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
+line14-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb│line14-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
+line15-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb│line15-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
+line16-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb│line16-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
+line17-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb│line17-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
+line18-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb│line18-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
+line19-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb│line19-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
+prompt $                                                    │prompt $                                                    
+Bye from Mosaic!█                                                                                                        
diff --git a/src/tests/integration/snapshots/mosaic__tests__integration__basic__max_panes-2.snap b/src/tests/integration/snapshots/mosaic__tests__integration__basic__max_panes-2.snap
new file mode 100644
index 00000000..3d527ead
--- /dev/null
+++ b/src/tests/integration/snapshots/mosaic__tests__integration__basic__max_panes-2.snap
@@ -0,0 +1,24 @@
+---
+source: src/tests/integration/basic.rs
+expression: snapshot
+---
+a                                                           │█                                                           
+line14-aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa│                                                            
+aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa│                                                            
+a                                                           │                                                            
+line15-aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa│                                                            
+aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa│                                                            
+a                                                           │                                                            
+line16-aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa│                                                            
+aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa│                                                            
+a                                                           │                                                            
+line17-aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa│                                                            
+aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa│                                                            
+a                                                           │                                                            
+line18-aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa│                                                            
+aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa│                                                            
+a                                                           │                                                            
+line19-aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa│                                                            
+aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa│                                                            
+a                                                           │                                                            
+prompt $                                                    │                                                            
diff --git a/src/tests/integration/snapshots/mosaic__tests__integration__basic__max_panes-3.snap b/src/tests/integration/snapshots/mosaic__tests__integration__basic__max_panes-3.snap
new file mode 100644
index 00000000..4a2fb140
--- /dev/null
+++ b/src/tests/integration/snapshots/mosaic__tests__integration__basic__max_panes-3.snap
@@ -0,0 +1,24 @@
+---
+source: src/tests/integration/basic.rs
+expression: snapshot
+---
+a                                                           │line1-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
+line14-aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa│line2-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
+aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa│line3-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
+a                                                           │line4-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
+line15-aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa│line5-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
+aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa│line6-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
+a                                                           │line7-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
+line16-aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa│line8-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
+aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa│line9-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
+a                                                           │line10-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
+line17-aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa│line11-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
+aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa│line12-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
+a                                                           │line13-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
+line18-aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa│line14-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
+aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa│line15-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
+a                                                           │line16-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
+line19-aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa│line17-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
+aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa│line18-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
+a                                                           │line19-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
+prompt $                                                    │prompt $ █                                                  
diff --git a/src/tests/integration/snapshots/mosaic__tests__integration__basic__max_panes-4.snap b/src/tests/integration/snapshots/mosaic__tests__integration__basic__max_panes-4.snap
new file mode 100644
index 00000000..4cd99158
--- /dev/null
+++ b/src/tests/integration/snapshots/mosaic__tests__integration__basic__max_panes-4.snap
@@ -0,0 +1,24 @@
+---
+source: src/tests/integration/basic.rs
+expression: snapshot
+---
+line17-aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa│line1-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
+aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa│line2-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
+a                                                           │line3-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
+line18-aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa│line4-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
+aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa│line5-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
+a                                                           │line6-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
+line19-aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa│line7-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
+aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa│line8-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
+a                                                           │line9-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
+prompt $                                                    │line10-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
+────────────────────────────────────────────────────────────┤line11-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
+█                                                           │line12-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
+                                                            │line13-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
+                                                            │line14-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
+                                                            │line15-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
+                                                            │line16-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
+                                                            │line17-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
+                                                            │line18-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
+                                                            │line19-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
+                                                            │prompt $                                                    
diff --git a/src/tests/integration/snapshots/mosaic__tests__integration__basic__max_panes-5.snap b/src/tests/integration/snapshots/mosaic__tests__integration__basic__max_panes-5.snap
new file mode 100644
index 00000000..cc0f4bc6
--- /dev/null
+++ b/src/tests/integration/snapshots/mosaic__tests__integration__basic__max_panes-5.snap
@@ -0,0 +1,24 @@
+---
+source: src/tests/integration/basic.rs
+expression: snapshot
+---
+line17-aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa│line1-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
+aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa│line2-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
+a                                                           │line3-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
+line18-aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa│line4-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
+aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa│line5-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
+a                                                           │line6-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
+line19-aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa│line7-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
+aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa│line8-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
+a                                                           │line9-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
+prompt $                                                    │line10-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
+────────────────────────────────────────────────────────────┤line11-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
+line12-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb│line12-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
+line13-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb│line13-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
+line14-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb│line14-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
+line15-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb│line15-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
+line16-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb│line16-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
+line17-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb│line17-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
+line18-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb│line18-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
+line19-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb│line19-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
+prompt $ █                                                  │prompt $                                                    
diff --git a/src/tests/integration/snapshots/mosaic__tests__integration__basic__max_panes-6.snap b/src/tests/integration/snapshots/mosaic__tests__integration__basic__max_panes-6.snap
new file mode 100644
index 00000000..b0f22d41
--- /dev/null
+++ b/src/tests/integration/snapshots/mosaic__tests__integration__basic__max_panes-6.snap
@@ -0,0 +1,24 @@
+---
+source: src/tests/integration/basic.rs
+expression: snapshot
+---
+line17-aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa│line11-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
+aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa│line12-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
+a                                                           │line13-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
+line18-aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa│line14-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
+aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa│line15-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
+a                                                           │line16-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
+line19-aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa│line17-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
+aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa│line18-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
+a                                                           │line19-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
+prompt $                                                    │prompt $                                                    
+────────────────────────────────────────────────────────────┼────────────────────────────────────────────────────────────
+line12-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb│█                                                           
+line13-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb│                                                            
+line14-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb│                                                            
+line15-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb│                                                            
+line16-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb│                                                            
+line17-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb│                                                            
+line18-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb│                                                            
+line19-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb│                                                            
+prompt $                                                    │                                                            
diff --git a/src/tests/integration/snapshots/mosaic__tests__integration__basic__max_panes-7.snap b/src/tests/integration/snapshots/mosaic__tests__integration__basic__max_panes-7.snap
new file mode 100644
index 00000000..e7d9ee8c
--- /dev/null
+++ b/src/tests/integration/snapshots/mosaic__tests__integration__basic__max_panes-7.snap
@@ -0,0 +1,24 @@
+---
+source: src/tests/integration/basic.rs
+expression: snapshot
+---
+line17-aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa│line11-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
+aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa│line12-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
+a                                                           │line13-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
+line18-aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa│line14-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
+aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa│line15-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
+a                                                           │line16-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
+line19-aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa│line17-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
+aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa│line18-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
+a                                                           │line19-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
+prompt $                                                    │prompt $                                                    
+────────────────────────────────────────────────────────────┼────────────────────────────────────────────────────────────
+line12-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb│line12-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
+line13-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb│line13-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
+line14-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb│line14-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
+line15-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb│line15-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
+line16-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb│line16-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
+line17-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb│line17-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
+line18-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb│line18-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
+line19-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb│line19-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
+prompt $                                                    │prompt $ █                                                  
diff --git a/src/tests/integration/snapshots/mosaic__tests__integration__basic__max_panes-8.snap b/src/tests/integration/snapshots/mosaic__tests__integration__basic__max_panes-8.snap
new file mode 100644
index 00000000..dc96752b
--- /dev/null
+++ b/src/tests/integration/snapshots/mosaic__tests__integration__basic__max_panes-8.snap
@@ -0,0 +1,24 @@
+---
+source: src/tests/integration/basic.rs
+expression: snapshot
+---
+line11-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb│█                                                           
+line12-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb│                                                            
+line13-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb│                                                            
+line14-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb│                                                            
+line15-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb│                                                            
+line16-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb│                                                            
+line17-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb│                                                            
+line18-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb│                                                            
+line19-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb│                                                            
+prompt $                                                    │                                                            
+────────────────────────────────────────────────────────────┼────────────────────────────────────────────────────────────
+line12-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb│line12-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
+line13-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb│line13-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
+line14-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb│line14-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
+line15-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb│line15-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
+line16-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb│line16-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
+line17-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb│line17-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
+line18-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb│line18-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
+line19-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb│line19-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
+prompt $                                                    │prompt $                                                    
diff --git a/src/tests/integration/snapshots/mosaic__tests__integration__basic__max_panes-9.snap b/src/tests/integration/snapshots/mosaic__tests__integration__basic__max_panes-9.snap
new file mode 100644
index 00000000..9dc18e7c
--- /dev/null
+++ b/src/tests/integration/snapshots/mosaic__tests__integration__basic__max_panes-9.snap
@@ -0,0 +1,24 @@
+---
+source: src/tests/integration/basic.rs
+expression: snapshot
+---
+line11-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb│line11-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
+line12-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb│line12-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
+line13-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb│line13-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
+line14-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb│line14-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
+line15-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb│line15-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
+line16-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb│line16-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
+line17-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb│line17-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
+line18-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb│line18-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
+line19-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb│line19-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
+prompt $                                                    │prompt $ █                                                  
+────────────────────────────────────────────────────────────┼────────────────────────────────────────────────────────────
+line12-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb│line12-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
+line13-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb│line13-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
+line14-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb│line14-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
+line15-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb│line15-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
+line16-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb│line16-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
+line17-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb│line17-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
+line18-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb│line18-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
+line19-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb│line19-bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
+prompt $                                                    │prompt $                                                    
diff --git a/src/tests/integration/snapshots/mosaic__tests__integration__basic__max_panes.snap b/src/tests/integration/snapshots/mosaic__tests__integration__basic__max_panes.snap
new file mode 100644
index 00000000..3d8b7146
--- /dev/null
+++ b/src/tests/integration/snapshots/mosaic__tests__integration__basic__max_panes.snap
@@ -0,0 +1,24 @@
+---
+source: src/tests/integration/basic.rs
+expression: snapshot
+---
+line1-aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
+line2-aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
+line3-aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
+line4-aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
+line5-aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
+line6-aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
+line7-aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
+line8-aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
+line9-aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
+line10-aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
+line11-aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
+line12-aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
+line13-aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
+line14-aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
+line15-aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
+line16-aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
+line17-aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
+line18-aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
+line19-aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
+prompt $ █