feat(ui): built-in plugin manager (#3633)

* add plugin list to session info

* feat(plugins): new_plugin and reload_plugin API commands

* feat(plugins): built-in plugin manager

* style(fmt): rustfmt

* update plugins

5 files changed, 1087 insertions, 0 deletions

diff --git a/default-plugins/plugin-manager/.cargo/config.toml b/default-plugins/plugin-manager/.cargo/config.toml
new file mode 100644
index 00000000..6b77899c
--- /dev/null
+++ b/default-plugins/plugin-manager/.cargo/config.toml
@@ -0,0 +1,2 @@
+[build]
+target = "wasm32-wasi"
diff --git a/default-plugins/plugin-manager/.gitignore b/default-plugins/plugin-manager/.gitignore
new file mode 100644
index 00000000..ea8c4bf7
--- /dev/null
+++ b/default-plugins/plugin-manager/.gitignore
@@ -0,0 +1 @@
+/target
diff --git a/default-plugins/plugin-manager/Cargo.toml b/default-plugins/plugin-manager/Cargo.toml
new file mode 100644
index 00000000..71ef3626
--- /dev/null
+++ b/default-plugins/plugin-manager/Cargo.toml
@@ -0,0 +1,10 @@
+[package]
+name = "plugin-manager"
+version = "0.1.0"
+authors = ["Aram Drevekenin <aram@poor.dev>"]
+edition = "2018"
+
+[dependencies]
+uuid = { version = "1.7.0", features = ["v4"] }
+fuzzy-matcher = "0.3.7"
+zellij-tile = { path = "../../zellij-tile" }
diff --git a/default-plugins/plugin-manager/LICENSE.md b/default-plugins/plugin-manager/LICENSE.md
new file mode 120000
index 00000000..f0608a63
--- /dev/null
+++ b/default-plugins/plugin-manager/LICENSE.md
@@ -0,0 +1 @@
+../../LICENSE.md
\ No newline at end of file
diff --git a/default-plugins/plugin-manager/src/main.rs b/default-plugins/plugin-manager/src/main.rs
new file mode 100644
index 00000000..bc451d8a
--- /dev/null
+++ b/default-plugins/plugin-manager/src/main.rs
@@ -0,0 +1,1073 @@
+use fuzzy_matcher::skim::SkimMatcherV2;
+use fuzzy_matcher::FuzzyMatcher;
+use uuid::Uuid;
+use zellij_tile::prelude::*;
+
+use std::collections::{BTreeMap, HashMap};
+
+pub struct SearchResult {
+    plugin_id: u32,
+    plugin_info: PluginInfo,
+    indices: Vec<usize>,
+    score: i64,
+}
+
+impl SearchResult {
+    pub fn new(plugin_id: u32, plugin_info: &PluginInfo, indices: Vec<usize>, score: i64) -> Self {
+        SearchResult {
+            plugin_id,
+            plugin_info: plugin_info.clone(),
+            indices,
+            score,
+        }
+    }
+}
+
+pub struct NewPluginScreen {
+    new_plugin_url: String,
+    new_plugin_config: Vec<(String, String)>, // key/val for easy in-place manipulation
+    new_config_key: String,
+    new_config_val: String,
+    entering_plugin_url: bool,
+    entering_config_key: bool,
+    entering_config_val: bool,
+    selected_config_index: Option<usize>,
+    request_ids: Vec<String>,
+    load_in_background: bool,
+}
+
+impl Default for NewPluginScreen {
+    fn default() -> Self {
+        NewPluginScreen {
+            new_plugin_url: String::new(),
+            new_plugin_config: vec![],
+            new_config_key: String::new(),
+            new_config_val: String::new(),
+            entering_plugin_url: true,
+            entering_config_key: false,
+            entering_config_val: false,
+            selected_config_index: None,
+            request_ids: vec![],
+            load_in_background: true,
+        }
+    }
+}
+
+impl NewPluginScreen {
+    pub fn render(&self, rows: usize, cols: usize) {
+        self.render_title(cols);
+        self.render_url_field(cols);
+        self.render_configuration_title();
+        let config_list_len = self.render_config_list(cols, rows.saturating_sub(10)); // 10 - the rest
+        self.render_background_toggle(6 + config_list_len + 1);
+        if !self.editing_configuration() {
+            self.render_help(rows);
+        }
+    }
+    fn render_title(&self, cols: usize) {
+        let title_text = format!("LOAD NEW PLUGIN");
+        let title_text_len = title_text.chars().count();
+        let title = Text::new(title_text);
+        print_text_with_coordinates(
+            title,
+            (cols / 2).saturating_sub(title_text_len / 2),
+            0,
+            None,
+            None,
+        );
+    }
+    fn render_url_field(&self, cols: usize) {
+        let url_field = if self.entering_plugin_url {
+            let truncated_url =
+                truncate_string_start(&self.new_plugin_url, cols.saturating_sub(19)); // 17 the length of the prompt + 2 for padding and cursor
+            let text = format!("Enter Plugin URL: {}_", truncated_url);
+            Text::new(text).color_range(2, ..=16).color_range(3, 18..)
+        } else {
+            let truncated_url =
+                truncate_string_start(&self.new_plugin_url, cols.saturating_sub(18)); // 17 the length of the prompt + 1 for padding
+            let text = format!("Enter Plugin URL: {}", truncated_url);
+            Text::new(text).color_range(2, ..=16).color_range(0, 18..)
+        };
+        print_text_with_coordinates(url_field, 0, 2, None, None);
+        let url_helper =
+            NestedListItem::new(format!("<Ctrl d> - Load from Disk")).color_range(3, ..=8);
+        print_nested_list_with_coordinates(vec![url_helper], 0, 3, None, None);
+    }
+    fn render_configuration_title(&self) {
+        let configuration_title =
+            if !self.editing_configuration() && self.new_plugin_config.is_empty() {
+                Text::new(format!("Plugin Configuration: <TAB> - Edit"))
+                    .color_range(2, ..=20)
+                    .color_range(3, 22..=26)
+            } else if !self.editing_configuration() {
+                Text::new(format!(
+                    "Plugin Configuration: <TAB> - Edit, <↓↑> - Navigate, <Del> - Delete"
+                ))
+                .color_range(2, ..=20)
+                .color_range(3, 22..=26)
+                .color_range(3, 36..=39)
+                .color_range(3, 53..=57)
+            } else {
+                Text::new(format!(
+                    "Plugin Configuration: [Editing: <TAB> - Next, <ENTER> - Accept]"
+                ))
+                .color_range(2, ..=20)
+                .color_range(3, 32..=36)
+                .color_range(3, 46..=52)
+            };
+        print_text_with_coordinates(configuration_title, 0, 5, None, None);
+    }
+    fn editing_configuration(&self) -> bool {
+        self.entering_config_key || self.entering_config_val
+    }
+    fn render_config_list(&self, cols: usize, rows: usize) -> usize {
+        let mut items = vec![];
+        let mut more_config_items = 0;
+        for (i, (config_key, config_val)) in self.new_plugin_config.iter().enumerate() {
+            let is_selected = Some(i) == self.selected_config_index;
+            if i >= rows {
+                more_config_items += 1;
+            } else if is_selected && self.editing_config_line() {
+                items.push(self.render_editing_config_line(config_key, config_val, cols));
+            } else {
+                items.push(self.render_config_line(config_key, config_val, is_selected, cols));
+            }
+        }
+        if self.editing_new_config_line() {
+            items.push(self.render_editing_config_line(
+                &self.new_config_key,
+                &self.new_config_val,
+                cols,
+            ));
+        } else if items.is_empty() {
+            items.push(NestedListItem::new("<NO CONFIGURATION>").color_range(0, ..));
+        }
+        let config_list_len = items.len();
+        print_nested_list_with_coordinates(items, 0, 6, Some(cols), None);
+        if more_config_items > 0 {
+            let more_text = format!("[+{}]", more_config_items);
+            print_text_with_coordinates(
+                Text::new(more_text).color_range(1, ..),
+                0,
+                6 + config_list_len,
+                None,
+                None,
+            );
+        }
+        config_list_len
+    }
+    fn editing_config_line(&self) -> bool {
+        self.entering_config_key || self.entering_config_val
+    }
+    fn editing_new_config_line(&self) -> bool {
+        (self.entering_config_key || self.entering_config_val)
+            && self.selected_config_index.is_none()
+    }
+    fn render_editing_config_line(
+        &self,
+        config_key: &str,
+        config_val: &str,
+        config_line_max_len: usize,
+    ) -> NestedListItem {
+        let config_line_max_len = config_line_max_len.saturating_sub(6); // 3 - line padding, 1 -
+                                                                         // cursor, 2 ": "
+        let config_key_max_len = config_line_max_len / 2;
+        let config_val_max_len = config_line_max_len.saturating_sub(config_key_max_len);
+        let config_key = if config_key.chars().count() > config_key_max_len {
+            truncate_string_start(&config_key, config_key_max_len)
+        } else {
+            config_key.to_owned()
+        };
+        let config_val = if config_val.chars().count() > config_val_max_len {
+            truncate_string_start(&config_val, config_val_max_len)
+        } else {
+            config_val.to_owned()
+        };
+        if self.entering_config_key {
+            let val = if config_val.is_empty() {
+                "<EMPTY>".to_owned()
+            } else {
+                config_val
+            };
+            NestedListItem::new(format!("{}_: {}", config_key, val))
+                .color_range(3, ..=config_key.chars().count())
+                .color_range(1, config_key.chars().count() + 3..)
+        } else {
+            let key = if config_key.is_empty() {
+                "<EMPTY>".to_owned()
+            } else {
+                config_key
+            };
+            NestedListItem::new(format!("{}: {}_", key, config_val))
+                .color_range(0, ..key.chars().count())
+                .color_range(3, key.chars().count() + 2..)
+        }
+    }
+    fn render_config_line(
+        &self,
+        config_key: &str,
+        config_val: &str,
+        is_selected: bool,
+        config_line_max_len: usize,
+    ) -> NestedListItem {
+        let config_line_max_len = config_line_max_len.saturating_sub(5); // 3 - line padding,
+                                                                         // 2 - ": "
+        let config_key = if config_key.is_empty() {
+            "<EMPTY>"
+        } else {
+            config_key
+        };
+        let config_val = if config_val.is_empty() {
+            "<EMPTY>"
+        } else {
+            config_val
+        };
+        let config_key_max_len = config_line_max_len / 2;
+        let config_val_max_len = config_line_max_len.saturating_sub(config_key_max_len);
+        let config_key = if config_key.chars().count() > config_key_max_len {
+            truncate_string_start(&config_key, config_key_max_len)
+        } else {
+            config_key.to_owned()
+        };
+
+        let config_val = if config_val.chars().count() > config_val_max_len {
+            truncate_string_start(&config_val, config_val_max_len)
+        } else {
+            config_val.to_owned()
+        };
+        let mut item = NestedListItem::new(format!("{}: {}", config_key, config_val))
+            .color_range(0, ..config_key.chars().count())
+            .color_range(1, config_key.chars().count() + 2..);
+        if is_selected {
+            item = item.selected()
+        }
+        item
+    }
+    fn render_background_toggle(&self, y_coordinates: usize) {
+        let key_shortcuts_text = format!("Ctrl l");
+        print_text_with_coordinates(
+            Text::new(&key_shortcuts_text).color_range(3, ..),
+            0,
+            y_coordinates,
+            None,
+            None,
+        );
+        let load_in_background_text = format!("Load in Background");
+        let load_in_foreground_text = format!("Load in Foreground");
+        let (load_in_background_ribbon, load_in_foreground_ribbon) = if self.load_in_background {
+            (
+                Text::new(&load_in_background_text).selected(),
+                Text::new(&load_in_foreground_text),
+            )
+        } else {
+            (
+                Text::new(&load_in_background_text),
+                Text::new(&load_in_foreground_text).selected(),
+            )
+        };
+        print_ribbon_with_coordinates(
+            load_in_background_ribbon,
+            key_shortcuts_text.chars().count() + 1,
+            y_coordinates,
+            None,
+            None,
+        );
+        print_ribbon_with_coordinates(
+            load_in_foreground_ribbon,
+            key_shortcuts_text.chars().count() + 1 + load_in_background_text.chars().count() + 4,
+            y_coordinates,
+            None,
+            None,
+        );
+    }
+    fn render_help(&self, rows: usize) {
+        let enter_line = Text::new(format!(
+            "Help: <ENTER> - Accept and Load Plugin, <ESC> - Cancel"
+        ))
+        .color_range(3, 6..=12)
+        .color_range(3, 40..=44);
+        print_text_with_coordinates(enter_line, 0, rows, None, None);
+    }
+    fn get_field_being_edited_mut(&mut self) -> Option<&mut String> {
+        if self.entering_plugin_url {
+            Some(&mut self.new_plugin_url)
+        } else {
+            match self.selected_config_index {
+                Some(selected_config_index) => {
+                    if self.entering_config_key {
+                        self.new_plugin_config
+                            .get_mut(selected_config_index)
+                            .map(|(key, _val)| key)
+                    } else if self.entering_config_val {
+                        self.new_plugin_config
+                            .get_mut(selected_config_index)
+                            .map(|(_key, val)| val)
+                    } else {
+                        None
+                    }
+                },
+                None => {
+                    if self.entering_config_key {
+                        Some(&mut self.new_config_key)
+                    } else if self.entering_config_val {
+                        Some(&mut self.new_config_val)
+                    } else {
+                        None
+                    }
+                },
+            }
+        }
+    }
+    fn add_edit_buffer_to_config(&mut self) {
+        if !self.new_config_key.is_empty() || !self.new_config_val.is_empty() {
+            self.new_plugin_config.push((
+                self.new_config_key.drain(..).collect(),
+                self.new_config_val.drain(..).collect(),
+            ));
+        }
+    }
+    pub fn handle_key(&mut self, key: KeyWithModifier) -> (bool, bool) {
+        let (mut should_render, mut should_close) = (false, false);
+
+        match key.bare_key {
+            BareKey::Char(character) if key.has_no_modifiers() && character != ' ' => {
+                if let Some(field) = self.get_field_being_edited_mut() {
+                    field.push(character);
+                }
+                should_render = true;
+            },
+            BareKey::Backspace if key.has_no_modifiers() => {
+                if let Some(field) = self.get_field_being_edited_mut() {
+                    field.pop();
+                }
+                should_render = true;
+            },
+            BareKey::Enter if key.has_no_modifiers() => {
+                if self.editing_configuration() {
+                    self.add_edit_buffer_to_config();
+                    self.entering_config_key = false;
+                    self.entering_config_val = false;
+                    self.entering_plugin_url = true;
+                    should_render = true;
+                } else {
+                    let plugin_url: String = self.new_plugin_url.drain(..).collect();
+                    self.add_edit_buffer_to_config();
+                    let config = self.new_plugin_config.drain(..).into_iter().collect();
+                    let load_in_background = self.load_in_background;
+                    let skip_plugin_cache = true;
+                    load_new_plugin(plugin_url, config, load_in_background, skip_plugin_cache);
+                    should_render = true;
+                    should_close = true;
+                }
+            },
+            BareKey::Tab if key.has_no_modifiers() => {
+                if self.entering_plugin_url {
+                    self.entering_plugin_url = false;
+                    self.entering_config_key = true;
+                } else if self.entering_config_key {
+                    self.entering_config_key = false;
+                    self.entering_config_val = true;
+                } else if self.entering_config_val {
+                    self.entering_config_val = false;
+                    if self.selected_config_index.is_none() {
+                        // new config, add it to the map
+                        self.add_edit_buffer_to_config();
+                        self.entering_config_key = true;
+                    } else {
+                        self.entering_plugin_url = true;
+                    }
+                    self.selected_config_index = None;
+                } else if self.selected_config_index.is_some() {
+                    self.entering_config_key = true;
+                } else {
+                    self.entering_plugin_url = true;
+                }
+                should_render = true;
+            },
+            BareKey::Esc if key.has_no_modifiers() => {
+                if self.entering_config_key
+                    || self.entering_config_val
+                    || self.selected_config_index.is_some()
+                {
+                    self.entering_plugin_url = true;
+                    self.entering_config_key = false;
+                    self.entering_config_val = false;
+                    self.selected_config_index = None;
+                    self.add_edit_buffer_to_config();
+                    should_render = true;
+                } else {
+                    should_close = true;
+                }
+            },
+            BareKey::Down if key.has_no_modifiers() => {
+                if !self.editing_configuration() {
+                    let max_len = self.new_plugin_config.len().saturating_sub(1);
+                    let has_config_values = !self.new_plugin_config.is_empty();
+                    if self.selected_config_index.is_none() && has_config_values {
+                        self.selected_config_index = Some(0);
+                    } else if self.selected_config_index == Some(max_len) {
+                        self.selected_config_index = None;
+                    } else {
+                        self.selected_config_index = self.selected_config_index.map(|s| s + 1);
+                    }
+                }
+                should_render = true;
+            },
+            BareKey::Up if key.has_no_modifiers() => {
+                if !self.editing_configuration() {
+                    let max_len = self.new_plugin_config.len().saturating_sub(1);
+                    let has_config_values = !self.new_plugin_config.is_empty();
+                    if self.selected_config_index.is_none() && has_config_values {
+                        self.selected_config_index = Some(max_len);
+                    } else if self.selected_config_index == Some(0) {
+                        self.selected_config_index = None;
+                    } else {
+                        self.selected_config_index =
+                            self.selected_config_index.map(|s| s.saturating_sub(1));
+                    }
+                }
+                should_render = true;
+            },
+            BareKey::Delete if key.has_no_modifiers() => {
+                if let Some(selected_config_index) = self.selected_config_index.take() {
+                    self.new_plugin_config.remove(selected_config_index);
+                    should_render = true;
+                }
+            },
+            BareKey::Char('d') if key.has_modifiers(&[KeyModifier::Ctrl]) => {
+                let mut args = BTreeMap::new();
+                let request_id = Uuid::new_v4();
+                self.request_ids.push(request_id.to_string());
+                let mut config = BTreeMap::new();
+                config.insert("request_id".to_owned(), request_id.to_string());
+                args.insert("request_id".to_owned(), request_id.to_string());
+                pipe_message_to_plugin(
+                    MessageToPlugin::new("filepicker")
+                        .with_plugin_url("filepicker")
+                        .with_plugin_config(config)
+                        .new_plugin_instance_should_have_pane_title(
+                            "Select a .wasm file to load as a plugin...",
+                        )
+                        .with_args(args),
+                );
+            },
+            BareKey::Char('l') if key.has_modifiers(&[KeyModifier::Ctrl]) => {
+                self.load_in_background = !self.load_in_background;
+                should_render = true;
+            },
+            _ => {},
+        }
+
+        (should_render, should_close)
+    }
+}
+
+#[derive(Default)]
+struct State {
+    userspace_configuration: BTreeMap<String, String>,
+    plugins: BTreeMap<u32, PluginInfo>,
+    search_results: Vec<SearchResult>,
+    selected_index: Option<usize>,
+    expanded_indices: Vec<usize>,
+    tab_position_to_tab_name: HashMap<usize, String>,
+    plugin_id_to_tab_position: HashMap<u32, usize>,
+    search_term: String,
+    new_plugin_screen: Option<NewPluginScreen>,
+}
+
+register_plugin!(State);
+
+impl ZellijPlugin for State {
+    fn load(&mut self, configuration: BTreeMap<String, String>) {
+        self.userspace_configuration = configuration;
+        subscribe(&[
+            EventType::ModeUpdate,
+            EventType::PaneUpdate,
+            EventType::TabUpdate,
+            EventType::Key,
+            EventType::SessionUpdate,
+            EventType::PermissionRequestResult,
+        ]);
+    }
+    fn pipe(&mut self, pipe_message: PipeMessage) -> bool {
+        if pipe_message.name == "filepicker_result" {
+            match (pipe_message.payload, pipe_message.args.get("request_id")) {
+                (Some(payload), Some(request_id)) => {
+                    match self
+                        .new_plugin_screen
+                        .as_mut()
+                        .and_then(|n| n.request_ids.iter().position(|p| p == request_id))
+                    {
+                        Some(request_id_position) => {
+                            self.new_plugin_screen
+                                .as_mut()
+                                .map(|n| n.request_ids.remove(request_id_position));
+                            let chosen_plugin_location = std::path::PathBuf::from(payload);
+                            self.new_plugin_screen.as_mut().map(|n| {
+                                n.new_plugin_url =
+                                    format!("file:{}", chosen_plugin_location.display())
+                            });
+                        },
+                        None => {
+                            eprintln!("request id not found");
+                        },
+                    }
+                },
+                _ => {},
+            }
+            true
+        } else {
+            false
+        }
+    }
+    fn update(&mut self, event: Event) -> bool {
+        let mut should_render = false;
+        match event {
+            Event::PermissionRequestResult(_) => {
+                let own_plugin_id = get_plugin_ids().plugin_id;
+                rename_plugin_pane(own_plugin_id, "Plugin Manager");
+                should_render = true;
+            },
+            Event::SessionUpdate(live_sessions, _dead_sessions) => {
+                for session in live_sessions {
+                    if session.is_current_session {
+                        if session.plugins != self.plugins {
+                            self.plugins = session.plugins;
+                            self.reset_selection();
+                            self.update_search_term();
+                        }
+                        for tab in session.tabs {
+                            self.tab_position_to_tab_name.insert(tab.position, tab.name);
+                        }
+                    }
+                }
+                should_render = true;
+            },
+            Event::PaneUpdate(pane_manifest) => {
+                for (tab_position, panes) in pane_manifest.panes {
+                    for pane_info in panes {
+                        if pane_info.is_plugin {
+                            self.plugin_id_to_tab_position
+                                .insert(pane_info.id, tab_position);
+                        }
+                    }
+                }
+            },
+            Event::Key(key) => match self.new_plugin_screen.as_mut() {
+                Some(new_plugin_screen) => {
+                    let (should_render_new_plugin_screen, should_close_new_plugin_screen) =
+                        new_plugin_screen.handle_key(key);
+                    if should_close_new_plugin_screen {
+                        self.new_plugin_screen = None;
+                        should_render = true;
+                    } else {
+                        should_render = should_render_new_plugin_screen;
+                    }
+                },
+                None => should_render = self.handle_main_screen_key(key),
+            },
+            _ => (),
+        };
+        should_render
+    }
+
+    fn render(&mut self, rows: usize, cols: usize) {
+        match &self.new_plugin_screen {
+            Some(new_plugin_screen) => {
+                new_plugin_screen.render(rows, cols);
+            },
+            None => {
+                self.render_search(cols);
+                let list_y = 2;
+                let max_list_items = rows.saturating_sub(4); // 2 top padding, 2 bottom padding
+                let (selected_index_in_list, plugin_list) = if self.is_searching() {
+                    self.render_search_results(cols)
+                } else {
+                    self.render_plugin_list(cols)
+                };
+                let (more_above, more_below, truncated_list) = self.truncate_list_to_screen(
+                    selected_index_in_list,
+                    plugin_list,
+                    max_list_items,
+                );
+                self.render_more_indication(
+                    more_above,
+                    more_below,
+                    cols,
+                    list_y,
+                    truncated_list.len(),
+                );
+                print_nested_list_with_coordinates(truncated_list, 0, list_y, Some(cols), None);
+                self.render_help(rows, cols);
+            },
+        }
+    }
+}
+
+impl State {
+    fn render_search_results(&self, cols: usize) -> (Option<usize>, Vec<NestedListItem>) {
+        let mut selected_index_in_list = None;
+        let mut plugin_list = vec![];
+        for (i, search_result) in self.search_results.iter().enumerate() {
+            let is_selected = Some(i) == self.selected_index;
+            if is_selected {
+                selected_index_in_list = Some(plugin_list.len());
+            }
+            let is_expanded = self.expanded_indices.contains(&i);
+            plugin_list.append(&mut self.render_search_result(
+                search_result,
+                is_selected,
+                is_expanded,
+                cols,
+                None,
+            ));
+        }
+        (selected_index_in_list, plugin_list)
+    }
+    fn render_plugin_list(&self, cols: usize) -> (Option<usize>, Vec<NestedListItem>) {
+        let mut selected_index_in_list = None;
+        let mut plugin_list = vec![];
+        for (i, (plugin_id, plugin_info)) in self.plugins.iter().enumerate() {
+            let is_selected = Some(i) == self.selected_index;
+            let is_expanded = self.expanded_indices.contains(&i);
+            if is_selected {
+                selected_index_in_list = Some(plugin_list.len());
+            }
+            plugin_list.append(&mut self.render_plugin(
+                *plugin_id,
+                plugin_info,
+                is_selected,
+                is_expanded,
+                cols,
+            ));
+        }
+        (selected_index_in_list, plugin_list)
+    }
+    fn render_more_indication(
+        &self,
+        more_above: usize,
+        more_below: usize,
+        cols: usize,
+        list_y: usize,
+        list_len: usize,
+    ) {
+        if more_above > 0 {
+            let text = format!("↑ [+{}]", more_above);
+            let text_len = text.chars().count();
+            print_text_with_coordinates(
+                Text::new(text).color_range(1, ..),
+                cols.saturating_sub(text_len),
+                list_y.saturating_sub(1),
+                None,
+                None,
+            );
+        }
+        if more_below > 0 {
+            let text = format!("↓ [+{}]", more_below);
+            let text_len = text.chars().count();
+            print_text_with_coordinates(
+                Text::new(text).color_range(1, ..),
+                cols.saturating_sub(text_len),
+                list_y + list_len,
+                None,
+                None,
+            );
+        }
+    }
+    pub fn render_search(&self, cols: usize) {
+        let text = format!(" SEARCH: {}_", self.search_term);
+        if text.chars().count() <= cols {
+            let text = Text::new(text).color_range(3, 9..);
+            print_text_with_coordinates(text, 0, 0, None, None);
+        } else {
+            let truncated_search_term =
+                truncate_string_start(&self.search_term, cols.saturating_sub(10)); // 9 the length of the SEARCH prompt + 1 for the cursor
+            let text = format!(" SEARCH: {}_", truncated_search_term);
+            let text = Text::new(text).color_range(3, 9..);
+            print_text_with_coordinates(text, 0, 0, None, None);
+        }
+    }
+    pub fn render_plugin(
+        &self,
+        plugin_id: u32,
+        plugin_info: &PluginInfo,
+        is_selected: bool,
+        is_expanded: bool,
+        cols: usize,
+    ) -> Vec<NestedListItem> {
+        let mut items = vec![];
+        let plugin_location_len = plugin_info.location.chars().count();
+        let max_location_len = cols.saturating_sub(3); // 3 for the bulletin
+        let location_string = if plugin_location_len > max_location_len {
+            truncate_string_start(&plugin_info.location, max_location_len)
+        } else {
+            plugin_info.location.clone()
+        };
+        let mut item = self.render_plugin_line(location_string, None);
+        if is_selected {
+            item = item.selected();
+        }
+        items.push(item);
+        if is_expanded {
+            let tab_line = self.render_tab_line(plugin_id, cols);
+            items.push(tab_line);
+            if !plugin_info.configuration.is_empty() {
+                let config_line = NestedListItem::new(format!("Configuration:"))
+                    .color_range(2, ..=13)
+                    .indent(1);
+                items.push(config_line);
+                for (config_key, config_val) in &plugin_info.configuration {
+                    items.push(self.render_config_line(config_key, config_val, cols))
+                }
+            }
+        }
+        items
+    }
+    fn render_config_line(
+        &self,
+        config_key: &str,
+        config_val: &str,
+        cols: usize,
+    ) -> NestedListItem {
+        let config_line_padding = 9; // 7, left padding + 2 for the ": " between key/val
+        let config_line_max_len = cols.saturating_sub(config_line_padding);
+        let config_key_max_len = config_line_max_len / 2;
+        let config_val_max_len = config_line_max_len.saturating_sub(config_key_max_len);
+        let config_key = if config_key.chars().count() > config_key_max_len {
+            truncate_string_start(&config_key, config_key_max_len)
+        } else {
+            config_key.to_owned()
+        };
+
+        let config_val = if config_val.chars().count() > config_val_max_len {
+            truncate_string_start(&config_val, config_val_max_len)
+        } else {
+            config_val.to_owned()
+        };
+        NestedListItem::new(format!("{}: {}", config_key, config_val))
+            .indent(2)
+            .color_range(0, ..config_key.chars().count())
+            .color_range(1, config_key.chars().count() + 2..)
+    }
+    pub fn render_search_result(
+        &self,
+        search_result: &SearchResult,
+        is_selected: bool,
+        is_expanded: bool,
+        cols: usize,
+        plus_indication: Option<usize>,
+    ) -> Vec<NestedListItem> {
+        let mut items = vec![];
+        let plugin_info = &search_result.plugin_info;
+        let plugin_id = search_result.plugin_id;
+        let indices = &search_result.indices;
+        let plus_indication_len = plus_indication
+            .map(|p| p.to_string().chars().count() + 4)
+            .unwrap_or(0); // 4 for the plus indication decorators and space
+        let max_location_len = cols.saturating_sub(plus_indication_len + 3); // 3 for the bulletin
+        let (location_string, indices) = if plugin_info.location.chars().count() <= max_location_len
+        {
+            (plugin_info.location.clone(), indices.clone())
+        } else {
+            truncate_search_result(&plugin_info.location, max_location_len, indices)
+        };
+        let mut item = match plus_indication {
+            Some(plus_indication) => self.render_plugin_line_with_plus_indication(
+                location_string,
+                plus_indication,
+                Some(indices),
+            ),
+            None => self.render_plugin_line(location_string, Some(indices)),
+        };
+        if is_selected {
+            item = item.selected();
+        }
+        items.push(item);
+        if is_expanded {
+            let tab_line = self.render_tab_line(plugin_id, cols);
+            items.push(tab_line);
+            if !plugin_info.configuration.is_empty() {
+                let config_line = NestedListItem::new(format!("Configuration:"))
+                    .color_range(2, ..=13)
+                    .indent(1);
+                items.push(config_line);
+                for (config_key, config_value) in &plugin_info.configuration {
+                    items.push(self.render_config_line(config_key, config_value, cols))
+                }
+            }
+        }
+        items
+    }
+    fn render_plugin_line_with_plus_indication(
+        &self,
+        location_string: String,
+        plus_indication: usize,
+        indices: Option<Vec<usize>>,
+    ) -> NestedListItem {
+        let mut item = NestedListItem::new(&format!("{} [+{}]", location_string, plus_indication))
+            .color_range(0, ..)
+            .color_range(1, location_string.chars().count() + 1..);
+        if let Some(indices) = indices {
+            item = item.color_indices(3, indices);
+        }
+        item
+    }
+    fn render_plugin_line(
+        &self,
+        location_string: String,
+        indices: Option<Vec<usize>>,
+    ) -> NestedListItem {
+        let mut item = NestedListItem::new(location_string).color_range(0, ..);
+        if let Some(indices) = indices {
+            item = item.color_indices(3, indices);
+        }
+        item
+    }
+    fn render_tab_line(&self, plugin_id: u32, max_width: usize) -> NestedListItem {
+        let tab_of_plugin_id = self
+            .get_tab_of_plugin_id(plugin_id)
+            .unwrap_or_else(|| "N/A".to_owned());
+        let tab_line_padding_count = 10; // 5 the length of the "Tab: " + 5 for the left padding
+
+        let tab_of_plugin_id =
+            if tab_of_plugin_id.chars().count() + tab_line_padding_count > max_width {
+                truncate_string_start(
+                    &tab_of_plugin_id,
+                    max_width.saturating_sub(tab_line_padding_count),
+                )
+            } else {
+                tab_of_plugin_id
+            };
+
+        let tab_line = NestedListItem::new(format!("Tab: {}", tab_of_plugin_id))
+            .color_range(2, ..=3)
+            .indent(1);
+        tab_line
+    }
+    pub fn render_help(&self, y: usize, cols: usize) {
+        let full_text = "Help: <←↓↑→> - Navigate/Expand, <ENTER> - focus, <TAB> - Reload, <Del> - Close, <INSERT> - New";
+        let middle_text =
+            "Help: <←↓↑→/ENTER> - Navigate, <TAB> - Reload, <Del> - Close, <INSERT> - New";
+        let short_text = "<←↓↑→/ENTER/TAB/Del> - Navigate/Expand/Reload/Close, <INSERT> - New";
+        if cols >= full_text.chars().count() {
+            let text = Text::new(full_text)
+                .color_range(3, 5..=11)
+                .color_range(3, 32..=38)
+                .color_range(3, 49..=53)
+                .color_range(3, 65..=69)
+                .color_range(3, 80..=87);
+            print_text_with_coordinates(text, 0, y, Some(cols), None);
+        } else if cols >= middle_text.chars().count() {
+            let text = Text::new(middle_text)
+                .color_range(3, 6..=17)
+                .color_range(3, 31..=35)
+                .color_range(3, 47..=51)
+                .color_range(3, 62..=69);
+            print_text_with_coordinates(text, 0, y, Some(cols), None);
+        } else {
+            let text = Text::new(short_text)
+                .color_range(3, ..=21)
+                .color_range(3, 53..=60);
+            print_text_with_coordinates(text, 0, y, Some(cols), None);
+        }
+    }
+    pub fn selected_plugin_id(&self) -> Option<u32> {
+        if self.is_searching() {
+            self.selected_index
+                .and_then(|i| self.search_results.iter().nth(i))
+                .map(|search_result| search_result.plugin_id)
+        } else {
+            self.selected_index
+                .and_then(|i| self.plugins.iter().nth(i))
+                .map(|(id, _)| *id)
+        }
+    }
+    pub fn focus_selected(&self) {
+        if let Some(selected_plugin_id) = self.selected_plugin_id() {
+            focus_pane_with_id(PaneId::Plugin(selected_plugin_id), true);
+        }
+    }
+    pub fn reload_selected(&self) {
+        if let Some(selected_plugin_id) = self.selected_plugin_id() {
+            reload_plugin_with_id(selected_plugin_id);
+        }
+    }
+    pub fn close_selected(&self) {
+        if let Some(selected_plugin_id) = self.selected_plugin_id() {
+            close_plugin_pane(selected_plugin_id);
+        }
+    }
+    pub fn reset_selection(&mut self) {
+        self.selected_index = None;
+        self.expanded_indices.clear();
+    }
+    pub fn expand_selected(&mut self) {
+        if let Some(selected_index) = &self.selected_index {
+            self.expanded_indices.push(*selected_index);
+        }
+    }
+    pub fn collapse_selected(&mut self) {
+        if let Some(selected_index) = &self.selected_index {
+            self.expanded_indices.retain(|i| i != selected_index);
+        }
+    }
+    pub fn get_tab_of_plugin_id(&self, plugin_id: u32) -> Option<String> {
+        self.plugin_id_to_tab_position
+            .get(&plugin_id)
+            .and_then(|plugin_id| self.tab_position_to_tab_name.get(plugin_id))
+            .cloned()
+    }
+    pub fn update_search_term(&mut self) {
+        if self.search_term.is_empty() {
+            self.search_results.clear();
+        } else {
+            let mut matches = vec![];
+            let matcher = SkimMatcherV2::default().use_cache(true);
+            for (plugin_id, plugin_info) in &self.plugins {
+                if let Some((score, indices)) =
+                    matcher.fuzzy_indices(&plugin_info.location, &self.search_term)
+                {
+                    matches.push(SearchResult::new(*plugin_id, plugin_info, indices, score));
+                }
+            }
+            matches.sort_by(|a, b| b.score.cmp(&a.score));
+            self.search_results = matches;
+        }
+    }
+    pub fn handle_main_screen_key(&mut self, key: KeyWithModifier) -> bool {
+        let mut should_render = false;
+        match key.bare_key {
+            BareKey::Char(character) if key.has_no_modifiers() && character != ' ' => {
+                self.search_term.push(character);
+                self.update_search_term();
+                self.reset_selection();
+                should_render = true;
+            },
+            BareKey::Backspace if key.has_no_modifiers() => {
+                self.search_term.pop();
+                self.update_search_term();
+                self.reset_selection();
+                should_render = true;
+            },
+            BareKey::Down if key.has_no_modifiers() => {
+                let max_len = if self.is_searching() {
+                    self.search_results.len().saturating_sub(1)
+                } else {
+                    self.plugins.keys().len().saturating_sub(1)
+                };
+                if self.selected_index.is_none() {
+                    self.selected_index = Some(0);
+                } else if self.selected_index == Some(max_len) {
+                    self.selected_index = None;
+                } else {
+                    self.selected_index = self.selected_index.map(|s| s + 1);
+                }
+                should_render = true;
+            },
+            BareKey::Up if key.has_no_modifiers() => {
+                let max_len = if self.is_searching() {
+                    self.plugins.keys().len().saturating_sub(1)
+                } else {
+                    self.search_results.len().saturating_sub(1)
+                };
+                if self.selected_index.is_none() {
+                    self.selected_index = Some(max_len);
+                } else if self.selected_index == Some(0) {
+                    self.selected_index = None;
+                } else {
+                    self.selected_index = self.selected_index.map(|s| s.saturating_sub(1));
+                }
+                should_render = true;
+            },
+            BareKey::Enter if key.has_no_modifiers() => {
+                self.focus_selected();
+            },
+            BareKey::Right if key.has_no_modifiers() => {
+                self.expand_selected();
+                should_render = true;
+            },
+            BareKey::Left if key.has_no_modifiers() => {
+                self.collapse_selected();
+                should_render = true;
+            },
+            BareKey::Tab if key.has_no_modifiers() => {
+                self.reload_selected();
+            },
+            BareKey::Insert if key.has_no_modifiers() => {
+                self.new_plugin_screen = Some(Default::default());
+                should_render = true;
+            },
+            BareKey::Delete if key.has_no_modifiers() => {
+                self.close_selected();
+            },
+            BareKey::Esc if key.has_no_modifiers() => {
+                self.search_term.clear();
+                self.update_search_term();
+                should_render = true;
+            },
+            _ => {},
+        }
+        should_render
+    }
+    pub fn is_searching(&self) -> bool {
+        self.search_term.len() > 0
+    }
+    fn truncate_list_to_screen(
+        &self,
+        selected_index_in_list: Option<usize>,
+        mut plugin_list: Vec<NestedListItem>,
+        max_list_items: usize,
+    ) -> (usize, usize, Vec<NestedListItem>) {
+        let mut more_above = 0;
+        let mut more_below = 0;
+        if plugin_list.len() > max_list_items {
+            let anchor_line = selected_index_in_list.unwrap_or(0);
+            let list_start = anchor_line.saturating_sub(max_list_items / 2);
+            let list_end = (list_start + max_list_items).saturating_sub(1);
+            let mut to_render = vec![];
+            for (i, item) in plugin_list.drain(..).enumerate() {
+                if i >= list_start && i < list_end {
+                    to_render.push(item);
+                } else if i >= list_end {
+                    more_below += 1;
+                } else if i < list_start {
+                    more_above += 1;
+                }
+            }
+            plugin_list = to_render;
+        }
+        (more_above, more_below, plugin_list)
+    }
+}
+
+fn truncate_string_start(string_to_truncate: &str, max_len: usize) -> String {
+    let mut truncated_string = string_to_truncate.to_owned();
+    let count_to_remove = truncated_string.chars().count().saturating_sub(max_len) + 5;
+    if truncated_string.chars().count() > max_len {
+        truncated_string.replace_range(0..count_to_remove, "[...]");
+    }
+    truncated_string
+}
+
+fn truncate_search_result(
+    plugin_location: &str,
+    max_location_len: usize,
+    indices: &Vec<usize>,
+) -> (String, Vec<usize>) {
+    let truncated_location = truncate_string_start(&plugin_location, max_location_len);
+    let truncated_count = plugin_location
+        .chars()
+        .count()
+        .saturating_sub(max_location_len);
+    let adjusted_indices = indices
+        .iter()
+        .filter_map(|i| {
+            if i.saturating_sub(truncated_count) >= 5 {
+                Some(i.saturating_sub(truncated_count))
+            } else {
+                None
+            }
+        })
+        .collect();
+    (truncated_location, adjusted_indices)
+}