Merge pull request #19 from JoyOfHardware/add_term_support

Add term support

Cargo.toml

@@ -3,7 +3,9 @@ members = [
     "frontend",
     "backend",
     "shared",
-    "src-tauri", "test_files/components/rust_decoder",
+    "src-tauri", 
+    "test_files/components/rust_decoder",
+    "test_files/components/rust_diagram_connector",
 ]
 resolver = "2"
 

Makefile.toml

@@ -165,7 +165,7 @@ description = "Install Tauri CLI (tauri) locally"
 command = "cargo"
 args = [
     "install", 
-    "tauri-cli@=2.0.0-beta.17", 
+    "tauri-cli@=2.1.0", 
     "--locked",
     "--root",
     "tauri",

README.md

@@ -69,6 +69,16 @@
   <img width="800" src="docs/video_diagrams.gif" alt="Fastwave - Diagrams" />
 </p>
 
+<p align="center">Diagram Connector Demo</p> 
+<p align="center">
+  <img width="800" src="docs/video_diagram_connector.gif" alt="Fastwave - Diagram Connector demo" />
+</p>
+
+<p align="center">Diagram Connector Code snippet</p>
+<p align="center">
+  <img width="500" src="docs/screenshot_diagram_connector_rs.png" alt="Fastwave - Diagram Connector Code snippet" />
+</p>
+
 ---
 
 ### Installation (desktop version):

frontend/Cargo.toml

@@ -14,6 +14,7 @@ wasm-bindgen-test = "0.3.19"
 unexpected_cfgs = { level = "allow", check-cfg = ['cfg(FASTWAVE_PLATFORM)'] }
 
 [dependencies]
+unicode-segmentation = "1.10"
 zoon.workspace = true
 wellen.workspace = true
 shared = { path = "../shared", features = ["frontend"] }

frontend/src/diagram_panel/excalidraw_canvas.rs

@@ -76,5 +76,15 @@ mod js_bridge {
 
         #[wasm_bindgen(method)]
         pub fn draw_diagram_element(this: &ExcalidrawController, excalidraw_element: JsValue);
+
+        #[wasm_bindgen(method)]
+        pub fn listen_for_component_text_changes(
+            this: &ExcalidrawController,
+            component_id: &str,
+            on_change: &Closure<dyn Fn(String)>,
+        );
+
+        #[wasm_bindgen(method)]
+        pub fn set_component_text(this: &ExcalidrawController, component_id: &str, text: &str);
     }
 }

frontend/src/header_panel.rs

@@ -1,6 +1,7 @@
 use crate::{platform, theme::*, Filename, Layout, Mode};
 use std::sync::Arc;
 use zoon::*;
+use crate::term::TERM_OPEN;
 
 pub struct HeaderPanel {
     hierarchy: Mutable<Option<Arc<wellen::Hierarchy>>>,
@@ -36,7 +37,9 @@ impl HeaderPanel {
                     .s(Gap::both(15))
                     .item(self.load_button())
                     .item(self.layout_switcher())
-                    .item(self.mode_switcher()),
+                    .item(self.mode_switcher())
+                    .item(self.open_terminal())
+                    .item(self.open_konata_file()),
             )
     }
 
@@ -193,4 +196,44 @@ impl HeaderPanel {
                 })
             })
     }
+
+    fn open_konata_file(&self) -> impl Element {
+        let (hovered, hovered_signal) = Mutable::new_and_signal(false);
+        Button::new()
+            .s(Padding::new().x(20).y(10))
+            .s(Background::new().color_signal(
+                hovered_signal.map_bool(|| COLOR_MEDIUM_SLATE_BLUE, || COLOR_SLATE_BLUE),
+            ))
+            .s(Align::new().left())
+            .s(RoundedCorners::all(15))
+            .label(
+                El::new()
+                    .s(Font::new().no_wrap())
+                    .child("Open Konata file.."),
+            )
+            .on_hovered_change(move |is_hovered| hovered.set_neq(is_hovered))
+            .on_press(move || Task::start(platform::open_konata_file()))
+    }
+
+    fn open_terminal(&self) -> impl Element {
+        let (hovered, hovered_signal) = Mutable::new_and_signal(false);
+        Button::new()
+            .s(Padding::new().x(20).y(10))
+            .s(Background::new().color_signal(
+                hovered_signal.map_bool(|| COLOR_MEDIUM_SLATE_BLUE, || COLOR_SLATE_BLUE),
+            ))
+            .s(Align::new().left())
+            .s(RoundedCorners::all(15))
+            .label(
+                El::new()
+                    .s(Font::new().no_wrap())
+                    .child("Open Terminal"),
+            )
+            .on_hovered_change(move |is_hovered| hovered.set_neq(is_hovered))
+            .on_press(move || {
+                let term_open = TERM_OPEN.get();
+                TERM_OPEN.set(!term_open);
+
+            })
+    }
 }

frontend/src/main.rs

@@ -1,4 +1,6 @@
-use std::sync::Arc;
+use shared::DiagramConnectorMessage;
+use term::TERM_OPEN;
+use std::{mem, sync::Arc};
 use zoon::*;
 
 mod platform;
@@ -22,6 +24,9 @@ use command_panel::CommandPanel;
 pub mod theme;
 use theme::*;
 
+pub mod term;
+use shared::term::{TerminalDownMsg, TerminalScreen};
+
 #[derive(Clone, Copy, Default)]
 enum Layout {
     Tree,
@@ -53,11 +58,55 @@ static STORE: Lazy<Store> = lazy::default();
 
 fn main() {
     start_app("app", root);
+
     Task::start(async {
         // https://github.com/tauri-apps/tauri/issues/5170
         Timer::sleep(100).await;
         platform::show_window().await;
     });
+
+    Task::start(async {
+        platform::listen_diagram_connectors_messages(|message| {
+            match message {
+                DiagramConnectorMessage::ListenForComponentTextChanges {
+                    diagram_connector_name,
+                    component_id,
+                } => {
+                    let closure = Closure::new({
+                        // @TODO Rcs/Arcs?
+                        let diagram_connector_name = diagram_connector_name.clone();
+                        let component_id = component_id.clone();
+                        move |text| {
+                            Task::start(platform::notify_diagram_connector_text_change(
+                                diagram_connector_name.clone(),
+                                component_id.clone(),
+                                text,
+                            ));
+                        }
+                    });
+                    STORE
+                        .excalidraw_canvas_controller
+                        .lock_ref()
+                        .lock_ref()
+                        .as_ref()
+                        .unwrap_throw()
+                        .listen_for_component_text_changes(&component_id, &closure);
+                    // @TODO don't forget
+                    mem::forget(closure);
+                }
+                DiagramConnectorMessage::SetComponentText { component_id, text } => STORE
+                    .excalidraw_canvas_controller
+                    .lock_ref()
+                    .lock_ref()
+                    .as_ref()
+                    .unwrap_throw()
+                    .set_component_text(&component_id, &text),
+            }
+        }).await;
+        platform::listen_term_update(|down_msg| {
+            term::TERMINAL_STATE.set(down_msg);
+        }).await;
+    });
 }
 
 fn root() -> impl Element {
@@ -138,4 +187,20 @@ fn root() -> impl Element {
             }
         })))
         .item(CommandPanel::new())
+        .item_signal(
+            TERM_OPEN.signal_cloned().map(
+                |term_open| {
+                    match term_open {
+                        true =>
+                            El::new()
+                                .s(Height::fill().max(400).min(400))
+                                .s(Padding::all(5))
+                                .child(term::root()),
+                        false =>
+                            El::new()
+                                .child("")
+                    }
+                }
+            )
+        )
 }

frontend/src/platform.rs

@@ -4,6 +4,7 @@
 // NOTE: `FASTWAVE_PLATFORM` is set in `Makefile.toml` tasks and then in `build.rs`
 
 use crate::STORE;
+use shared::DiagramConnectorMessage;
 
 #[cfg(FASTWAVE_PLATFORM = "TAURI")]
 mod tauri;
@@ -17,10 +18,19 @@ use browser as platform;
 
 type Filename = String;
 type JavascriptCode = String;
+
 type AddedDecodersCount = usize;
 type RemovedDecodersCount = usize;
 type DecoderPath = String;
 
+type AddedDiagramConnectorsCount = usize;
+type RemovedDiagramConnectorsCount = usize;
+type DiagramConnectorPath = String;
+type DiagramConnectorName = String;
+type ComponentId = String;
+
+use shared::term::{TerminalDownMsg, TerminalScreen};
+
 pub async fn show_window() {
     platform::show_window().await
 }
@@ -64,6 +74,10 @@ pub async fn unload_signal(signal_ref: wellen::SignalRef) {
     platform::unload_signal(signal_ref).await
 }
 
+pub async fn send_char(c : String) {
+    platform::send_char(c).await
+}
+
 pub async fn add_decoders(decoder_paths: Vec<DecoderPath>) -> AddedDecodersCount {
     let count = platform::add_decoders(decoder_paths).await;
     if count > 0 {
@@ -85,3 +99,39 @@ async fn redraw_all_timeline_rows() {
         controller.redraw_all_rows().await
     }
 }
+
+pub async fn add_diagram_connectors(
+    diagram_connector_paths: Vec<DecoderPath>,
+) -> AddedDecodersCount {
+    let count = platform::add_diagram_connectors(diagram_connector_paths).await;
+    count
+}
+
+pub async fn remove_all_diagram_connectors() -> RemovedDecodersCount {
+    let count = platform::remove_all_diagram_connectors().await;
+    count
+}
+
+pub async fn listen_diagram_connectors_messages(
+    on_message: impl FnMut(DiagramConnectorMessage) + 'static,
+) {
+    platform::listen_diagram_connectors_messages(on_message).await;
+}
+
+pub async fn listen_term_update(
+    on_message: impl FnMut(TerminalDownMsg) + 'static,
+) {
+    platform::listen_term_update(on_message).await;
+}
+
+pub async fn notify_diagram_connector_text_change(
+    diagram_connector: DiagramConnectorName,
+    component_id: ComponentId,
+    text: String,
+) {
+    platform::notify_diagram_connector_text_change(diagram_connector, component_id, text).await;
+}
+
+pub async fn open_konata_file() {
+    platform::open_konata_file().await;
+}

frontend/src/platform/browser.rs

@@ -136,3 +136,38 @@ pub(super) async fn remove_all_decoders() -> super::RemovedDecodersCount {
     eprintln!("Removing decoders is not supported in the browser.");
     0
 }
+
+pub(super) async fn add_diagram_connectors(
+    diagram_connector_paths: Vec<super::DecoderPath>,
+) -> super::AddedDecodersCount {
+    // @TODO error message for user
+    eprintln!("Adding diagram connectors is not supported in the browser.");
+    0
+}
+
+pub(super) async fn remove_all_diagram_connectors() -> super::RemovedDiagramConnectorsCount {
+    // @TODO error message for user
+    eprintln!("Removing diagram connectors is not supported in the browser.");
+    0
+}
+
+pub async fn listen_diagram_connectors_messages(
+    on_message: impl FnMut(DiagramConnectorMessage) + 'static,
+) {
+    // @TODO error message for user
+    eprintln!("Removing listen for diagram connectors messages is not supported in the browser.");
+}
+
+pub async fn notify_diagram_connector_text_change(
+    diagram_connector: DiagramConnectorName,
+    component_id: ComponentId,
+    text: String,
+) {
+    // @TODO error message for user
+    eprintln!("Diagram connectors notifications are not supported in the browser.");
+}
+
+pub async fn open_konata_file() {
+    // @TODO error message for user
+    eprintln!("Opening Konata files is not supported in the browser.");
+}

frontend/src/platform/tauri.rs

@@ -1,3 +1,5 @@
+use shared::DiagramConnectorMessage;
+use shared::term::{TerminalDownMsg, TerminalScreen};
 use zoon::*;
 
 pub(super) async fn show_window() {
@@ -56,6 +58,12 @@ pub(super) async fn unload_signal(signal_ref: wellen::SignalRef) {
         .unwrap_throw()
 }
 
+pub(super) async fn send_char(c : String) {
+    tauri_glue::send_char(c)
+        .await
+        .unwrap_throw()
+}
+
 pub(super) async fn add_decoders(
     decoder_paths: Vec<super::DecoderPath>,
 ) -> super::AddedDecodersCount {
@@ -68,6 +76,56 @@ pub(super) async fn remove_all_decoders() -> super::RemovedDecodersCount {
         .unwrap_throw()
 }
 
+pub(super) async fn add_diagram_connectors(
+    diagram_connector_paths: Vec<super::DecoderPath>,
+) -> super::AddedDiagramConnectorsCount {
+    serde_wasm_bindgen::from_value(
+        tauri_glue::add_diagram_connectors(diagram_connector_paths)
+            .await
+            .unwrap_throw(),
+    )
+    .unwrap_throw()
+}
+
+pub(super) async fn remove_all_diagram_connectors() -> super::RemovedDiagramConnectorsCount {
+    serde_wasm_bindgen::from_value(
+        tauri_glue::remove_all_diagram_connectors()
+            .await
+            .unwrap_throw(),
+    )
+    .unwrap_throw()
+}
+
+pub(super) async fn listen_diagram_connectors_messages(
+    mut on_message: impl FnMut(DiagramConnectorMessage) + 'static,
+) {
+    let on_message =
+        move |message: JsValue| on_message(serde_wasm_bindgen::from_value(message).unwrap_throw());
+    tauri_glue::listen_diagram_connectors_messages(Closure::new(on_message).into_js_value()).await
+}
+
+pub(super) async fn listen_term_update(
+    mut on_message: impl FnMut(TerminalDownMsg) + 'static,
+) {
+    let on_message =
+        move |message: JsValue| on_message(serde_wasm_bindgen::from_value(message).unwrap_throw());
+    tauri_glue::listen_term_update(Closure::new(on_message).into_js_value()).await
+}
+
+pub(super) async fn notify_diagram_connector_text_change(
+    diagram_connector: super::DiagramConnectorName,
+    component_id: super::ComponentId,
+    text: String,
+) {
+    tauri_glue::notify_diagram_connector_text_change(diagram_connector, component_id, text)
+        .await
+        .unwrap_throw();
+}
+
+pub(super) async fn open_konata_file() {
+    tauri_glue::open_konata_file().await;
+}
+
 mod tauri_glue {
     use zoon::*;
 
@@ -99,6 +157,9 @@ mod tauri_glue {
         #[wasm_bindgen(catch)]
         pub async fn unload_signal(signal_ref_index: usize) -> Result<(), JsValue>;
 
+        #[wasm_bindgen(catch)]
+        pub async fn send_char(c : String) -> Result<(), JsValue>;
+
         #[wasm_bindgen(catch)]
         pub async fn add_decoders(
             decoder_paths: Vec<super::super::DecoderPath>,
@@ -106,5 +167,26 @@ mod tauri_glue {
 
         #[wasm_bindgen(catch)]
         pub async fn remove_all_decoders() -> Result<JsValue, JsValue>;
+
+        #[wasm_bindgen(catch)]
+        pub async fn add_diagram_connectors(
+            diagram_connector_paths: Vec<super::super::DiagramConnectorPath>,
+        ) -> Result<JsValue, JsValue>;
+
+        #[wasm_bindgen(catch)]
+        pub async fn remove_all_diagram_connectors() -> Result<JsValue, JsValue>;
+
+        pub async fn listen_diagram_connectors_messages(on_event: JsValue);
+
+        pub async fn listen_term_update(on_event: JsValue);
+
+        #[wasm_bindgen(catch)]
+        pub async fn notify_diagram_connector_text_change(
+            diagram_connector: super::super::DiagramConnectorName,
+            component_id: super::super::ComponentId,
+            text: String,
+        ) -> Result<(), JsValue>;
+
+        pub async fn open_konata_file();
     }
 }

frontend/src/script_bridge.rs

@@ -3,10 +3,15 @@ use wellen::GetItem;
 use zoon::*;
 
 type FullVarName = String;
+
 type AddedDecodersCount = usize;
 type RemovedDecodersCount = usize;
 type DecoderPath = String;
 
+type AddedDiagramConnectorsCount = usize;
+type RemovedDiagramConnectorsCount = usize;
+type DiagramConnectorPath = String;
+
 #[wasm_bindgen(module = "/typescript/bundles/strict_eval.js")]
 extern "C" {
     #[wasm_bindgen(catch)]
@@ -91,4 +96,16 @@ impl FW {
             controller.draw_diagram_element(excalidraw_element)
         }
     }
+
+    /// JS: `FW.add_diagram_connectors(["../test_files/components/rust_diagram_connector/rust_diagram_connector.wasm"])` -> `1`
+    pub async fn add_diagram_connectors(
+        connector_paths: Vec<DiagramConnectorPath>,
+    ) -> AddedDiagramConnectorsCount {
+        platform::add_diagram_connectors(connector_paths).await
+    }
+
+    /// JS: `FW.remove_all_diagram_connectors()` -> `5`
+    pub async fn remove_all_diagram_connectors() -> RemovedDiagramConnectorsCount {
+        platform::remove_all_diagram_connectors().await
+    }
 }

frontend/src/term.rs

@@ -0,0 +1,142 @@
+use std::ops::Index;
+
+use chrono::format;
+use zoon::*;
+use zoon::{println, eprintln, *};
+use shared::term::{TerminalDownMsg, TerminalScreen, TerminalUpMsg};
+use unicode_segmentation::UnicodeSegmentation;
+
+// use tokio::time::timeout;
+pub static TERM_OPEN: Lazy<Mutable<bool>> = Lazy::new(|| {false.into()});
+
+pub const TERMINAL_COLOR: Oklch = color!("oklch(20% 0.125 262.26)");
+
+pub static  TERMINAL_STATE: Lazy<Mutable<TerminalDownMsg>> =
+    Lazy::new(|| {
+        Mutable::new(TerminalDownMsg::TermNotStarted)
+    });
+
+pub fn root() -> impl Element {
+    let terminal =
+        El::new()
+            .s(Width::fill())
+            .s(Height::fill())
+            .s(Background::new().color(TERMINAL_COLOR))
+            .s(RoundedCorners::all(7))
+            .s(Font::new().family([
+                FontFamily::new("Lucida Console"),
+                FontFamily::new("Courier"),
+                FontFamily::new("monospace")
+                ]))
+            .update_raw_el(|raw_el| {
+                raw_el.global_event_handler(|event: events::KeyDown| {
+                    send_char(
+                        (&event).key().as_str(),
+                        (&event).ctrl_key(),
+                    );
+                })
+            })
+            .child_signal(TERMINAL_STATE.signal_cloned().map(
+                |down_msg| {
+                    match down_msg {
+                        TerminalDownMsg::FullTermUpdate(term) => {
+                            make_grid_with_newlines(&term)
+                        },
+                        TerminalDownMsg::TermNotStarted => {
+                            "Term not yet started!".to_string()
+                        },
+                        TerminalDownMsg::BackendTermStartFailure(msg) => {
+                            format!("Error: BackendTermStartFailure: {}", msg)
+                        }
+                    }
+                }
+                )
+            )
+            ;
+    let root = Column::new()
+        .s(Width::fill())
+        .s(Height::fill())
+        .s(Align::new().top())
+        .item(terminal);
+    root
+}
+
+fn send_char(
+    s           : &str,
+    has_control : bool,
+    ) {
+    match process_str(s, has_control) {
+        Some(c) => {
+            let send_c = c.clone();
+            Task::start(async move {
+                crate::platform::send_char(send_c.to_string()).await;
+            });
+        }
+        None => {}
+    }
+
+}
+
+
+fn make_grid_with_newlines(term: &TerminalScreen) -> String {
+    let mut formatted = String::with_capacity(term.content.len() + (term.content.len() / term.cols as usize));
+
+    term.content.chars().enumerate().for_each(|(i, c)| {
+        formatted.push(c);
+        if (i + 1) as u16 % term.cols == 0 {
+            formatted.push('\n');
+        }
+    });
+
+    formatted
+}
+
+
+fn process_str(s: &str, has_ctrl: bool) -> Option<char> {
+    match s {
+        "Enter"         => {return Some('\n');}
+        "Escape"        => {return Some('\x1B');}
+        "Backspace"     => {return Some('\x08');}
+        "ArrowUp"       => {return Some('\x10');}
+        "ArrowDown"     => {return Some('\x0E');}
+        "ArrowLeft"     => {return Some('\x02');}
+        "ArrowRight"    => {return Some('\x06');}
+        "Control"       => {return None;}
+        "Shift"         => {return None;}
+        "Meta"          => {return None;}
+        "Alt"           => {return None;}
+        _ => {}
+    }
+
+    let mut graphemes = s.graphemes(true);
+    let first = graphemes.next();
+
+    if let Some(g) = first {
+        if g.len() == 1 {
+            if let Some(c) = g.chars().next() {
+                let c = process_for_ctrl_char(c, has_ctrl);
+                return Some(c);
+            }
+        }
+    }
+
+    None
+}
+
+// Helper function to process control characters
+
+fn is_lowercase_alpha(c: char) -> bool {
+    char_is_between_inclusive(c, 'a', 'z')
+}
+
+fn process_for_ctrl_char(c: char, has_ctrl: bool) -> char {
+    if has_ctrl {
+        (c as u8 & 0x1F) as char
+    } else {
+        c
+    }
+}
+
+fn char_is_between_inclusive(c : char, lo_char : char, hi_char : char) -> bool {
+    c >= lo_char && c <= hi_char
+}

frontend/typescript/excalidraw_canvas/excalidraw_canvas.tsx

@@ -7,17 +7,64 @@ import * as React from 'react'
 import * as ReactDOM from 'react-dom/client'
 
 export class ExcalidrawController {
-    api: ExcalidrawImperativeAPI | undefined
+    api: Promise<ExcalidrawImperativeAPI>
+    resolve_api: (api: ExcalidrawImperativeAPI) => void
 
-    constructor() {}
+    constructor() {
+      this.resolve_api = (api) => {};
+      this.api = new Promise(resolve => {
+        this.resolve_api = (api) => resolve(api)
+      });
+    }
 
     draw_diagram_element(excalidraw_element: ExcalidrawElement) {
-      if (typeof this.api !== 'undefined') {
+      this.api.then(api => {
-        const elements = this.api.getSceneElements()
+        const elements = api.getSceneElements()
-        this.api.updateScene({
+        api.updateScene({
           elements: elements.concat(excalidraw_element)
         })
-      }
+      });
+    }
+
+    listen_for_component_text_changes(id: string, on_change: (text: string) => void) {
+      this.api.then(api => {
+        let old_text: string | null = null; 
+        api.onChange((elements: readonly ExcalidrawElement[]) => {
+          const element = elements.find(element => element.id === id);
+          if (typeof element !== 'undefined') {
+            if (element.type === 'text') {
+              if (old_text === null) {
+                old_text = element.text;
+                on_change(old_text);
+              } else {
+                if (old_text !== element.text) {
+                  old_text = element.text;
+                  on_change(old_text);
+                }
+              }
+            }
+          }
+        })
+      })
+    }
+
+    set_component_text(id: string, text: string) {
+      this.api.then(api => {
+        let element_found = false;
+        const elements = api.getSceneElements().map(element => {
+          if (element.id === id) {
+            element_found = true;
+            return { ...element, text: text, originalText: text }
+          } else {
+            return element
+          }
+        });
+        if (element_found) {
+            api.updateScene({
+              elements
+            })
+        }
+      })
     }
 
     async init(parent_element: HTMLElement) {
@@ -37,7 +84,7 @@ export class ExcalidrawController {
                   // Font family: Code
                   currentItemFontFamily: 3,
                 }}}
-                excalidrawAPI={(api) => this.api = api}
+                excalidrawAPI={(api) => this.resolve_api(api)}
               >
                 <MainMenu>
                   <MainMenu.DefaultItems.LoadScene />

frontend/typescript/tauri_glue/tauri_glue.ts

@@ -1,18 +1,26 @@
 // @TODO use TS and Tauri bindgens to make this code properly typed
 
-import { core } from '@tauri-apps/api'
+import { core, event } from '@tauri-apps/api'
 
 const invoke = core.invoke;
+const listen = event.listen;
 
 type Filename = string;
 type JavascriptCode = string;
 type WellenHierarchy = unknown;
 type Timeline = unknown;
 type VarFormat = unknown;
+
 type AddedDecodersCount = number;
 type RemovedDecodersCount = number;
 type DecoderPath = string;
 
+type AddedDiagramConnectorsCount = number;
+type RemovedDiagramConnectorsCount = number;
+type DiagramConnectorPath = string;
+type DiagramConnectorName = string;
+type ComponentId = string;
+
 export async function show_window(): Promise<void> {
     return await invoke("show_window");
 }
@@ -30,20 +38,20 @@ export async function get_hierarchy(): Promise<WellenHierarchy> {
 }
 
 export async function load_signal_and_get_timeline(
-    signal_ref_index: number, 
+    signal_ref_index: number,
     timeline_zoom: number,
     timeline_viewport_width: number,
-    timeline_viewport_x: number, 
+    timeline_viewport_x: number,
     block_height: number,
     var_format: VarFormat,
 ): Promise<Timeline> {
-    return await invoke("load_signal_and_get_timeline", { 
+    return await invoke("load_signal_and_get_timeline", {
-        signal_ref_index, 
+        signal_ref_index,
-        timeline_zoom, 
+        timeline_zoom,
         timeline_viewport_width,
         timeline_viewport_x,
-        block_height, 
+        block_height,
-        var_format 
+        var_format
     });
 }
 
@@ -51,6 +59,10 @@ export async function unload_signal(signal_ref_index: number): Promise<void> {
     return await invoke("unload_signal", { signal_ref_index });
 }
 
+export async function send_char(c : string): Promise<void> {
+    return await invoke("send_char", { c });
+}
+
 export async function add_decoders(decoder_paths: Array<DecoderPath>): Promise<AddedDecodersCount> {
     return await invoke("add_decoders", { decoder_paths });
 }
@@ -58,3 +70,27 @@ export async function add_decoders(decoder_paths: Array<DecoderPath>): Promise<A
 export async function remove_all_decoders(): Promise<RemovedDecodersCount> {
     return await invoke("remove_all_decoders");
 }
+
+export async function add_diagram_connectors(diagram_connector_paths: Array<DiagramConnectorPath>): Promise<AddedDiagramConnectorsCount> {
+    return await invoke("add_diagram_connectors", { diagram_connector_paths });
+}
+
+export async function remove_all_diagram_connectors(): Promise<RemovedDiagramConnectorsCount> {
+    return await invoke("remove_all_diagram_connectors");
+}
+
+export async function listen_diagram_connectors_messages(on_message: (message: any) => void) {
+    return await listen("diagram_connector_message", (message) => on_message(message.payload));
+}
+
+export async function listen_term_update(on_message: (message: any) => void) {
+    return await listen("term_content", (message) => on_message(message.payload));
+}
+
+export async function notify_diagram_connector_text_change(diagram_connector: DiagramConnectorName, component_id: ComponentId, text: string): Promise<void> {
+    return await invoke("notify_diagram_connector_text_change", { diagram_connector, component_id, text });
+}
+
+export async function open_konata_file() {
+    return await invoke("open_konata_file");
+}

shared/src/lib.rs

@@ -7,6 +7,7 @@ mod signal_to_timeline;
 pub use signal_to_timeline::signal_to_timeline;
 
 pub mod wellen_helpers;
+pub mod term;
 
 #[derive(Serialize, Deserialize, Debug, Default)]
 #[serde(crate = "serde")]
@@ -30,3 +31,16 @@ pub struct TimeLineBlockLabel {
     pub x: u32,
     pub y: u32,
 }
+
+#[derive(Serialize, Deserialize, Debug, Clone)]
+#[serde(crate = "serde")]
+pub enum DiagramConnectorMessage {
+    ListenForComponentTextChanges {
+        diagram_connector_name: String,
+        component_id: String,
+    },
+    SetComponentText {
+        component_id: String,
+        text: String,
+    },
+}

shared/src/term.rs

@@ -0,0 +1,25 @@
+use moonlight::*;
+
+#[derive(Serialize, Deserialize, Debug, Clone)]
+#[serde(crate = "serde")]
+pub enum TerminalUpMsg {
+    RequestFullTermState,
+    RequestIncrementalTermStateUpdate,
+    SendCharacter(char),
+}
+
+#[derive(Serialize, Deserialize, Debug, Clone)]
+#[serde(crate = "serde")]
+pub enum TerminalDownMsg {
+    FullTermUpdate(TerminalScreen),
+    BackendTermStartFailure(String),
+    TermNotStarted
+}
+
+#[derive(Serialize, Deserialize, Debug, PartialEq, Clone)]
+#[serde(crate = "serde")]
+pub struct TerminalScreen {
+    pub cols    : u16,
+    pub rows    : u16,
+    pub content : String,
+}

src-tauri/Cargo.toml

@@ -13,18 +13,21 @@ name = "app_lib"
 crate-type = ["staticlib", "cdylib", "rlib"]
 
 [build-dependencies]
-tauri-build = { version = "=2.0.0-beta.17", features = [] }
+tauri-build = { version = "2.0.3", features = [] }
 
 [dependencies]
 wellen.workspace = true
+alacritty_terminal = { git = "https://github.com/alacritty/alacritty", rev = "cacdb5bb3b72bad2c729227537979d95af75978f" }
 shared = { path = "../shared", features = ["backend"] }
 serde_json = "1.0"
 serde = { version = "1.0", features = ["derive"] }
-tauri = { version = "=2.0.0-beta.22", features = ["macos-private-api", "linux-ipc-protocol"] }
+tauri = { version = "2.1.1", features = ["macos-private-api"] }
-tauri-plugin-window-state = "=2.0.0-beta.9"
+tauri-plugin-window-state = "2.0.2"
-tauri-plugin-dialog = "=2.0.0-beta.9"
+tauri-plugin-dialog = "2.0.4"
 once_cell = "1.19.0"
 futures = "0.3.30"
+reqwest = "0.12.9"
+tokio = "*"
 
 # wasmtime = "22.0.0"
 # wasmtime-wasi = "22.0.0"

src-tauri/capabilities/default.json

@@ -4,14 +4,6 @@
   "description": "enables the default permissions",
   "windows": ["main"],
   "permissions": [
-    "path:default",
+    "core:default"
-    "event:default",
-    "window:default",
-    "webview:default",
-    "app:default",
-    "resources:default",
-    "image:default",
-    "menu:default",
-    "tray:default"
   ]
 }

src-tauri/f.txt

@@ -0,0 +1,2 @@
+Hello, I'm typing a file in vim!!
+

src-tauri/src/aterm.rs

@@ -0,0 +1,116 @@
+use std::result;
+use std::sync::{mpsc, Arc};
+
+use alacritty_terminal::event::{Event, EventListener};
+use alacritty_terminal::event_loop::{EventLoop, Notifier};
+use alacritty_terminal::sync::FairMutex;
+use alacritty_terminal::term::{self, Term};
+use alacritty_terminal::term::cell::Cell;
+use alacritty_terminal::{tty, Grid};
+use tauri::Emitter;
+use shared::term::{TerminalDownMsg, TerminalScreen};
+
+use crate::terminal_size;
+
+#[derive(Clone)]
+pub struct EventProxy(mpsc::Sender<Event>);
+impl EventListener for EventProxy {
+    fn send_event(&self, event: Event) {
+        let _ = self.0.send(event.clone());
+    }
+}
+
+pub struct ATerm {
+    pub term: Arc<FairMutex<Term<EventProxy>>>,
+
+    pub rows : u16,
+    pub cols : u16,
+
+    /// Use tx to write things to terminal instance from outside world
+    pub tx: Notifier,
+
+    /// Use rx to read things from terminal instance.
+    /// Rx only has data when terminal state has changed,
+    /// otherwise, `std::sync::mpsc::recv` will block and sleep
+    /// until there is data.
+    pub rx: mpsc::Receiver<(u64, Event)>,
+}
+
+impl ATerm {
+    pub fn new() -> result::Result<ATerm, std::io::Error> {
+        let (rows, cols) = (21, 85);
+        let id = 1;
+        let pty_config = tty::Options {
+            shell: Some(tty::Shell::new("/bin/bash".to_string(), vec![])),
+            ..tty::Options::default()
+        };
+        let config = term::Config::default();
+        let terminal_size = terminal_size::TerminalSize::new(rows, cols);
+        let pty = tty::new(&pty_config, terminal_size.into(), id)?;
+        let (event_sender, event_receiver) = mpsc::channel();
+        let event_proxy = EventProxy(event_sender);
+        let term = Term::new::<terminal_size::TerminalSize>(
+            config,
+            &terminal_size.into(),
+            event_proxy.clone(),
+        );
+        let term = Arc::new(FairMutex::new(term));
+        let pty_event_loop = EventLoop::new(term.clone(), event_proxy, pty, false, false)?;
+        let notifier = Notifier(pty_event_loop.channel());
+        let (pty_proxy_sender, pty_proxy_receiver) = std::sync::mpsc::channel();
+        // Start pty event loop
+        pty_event_loop.spawn();
+        std::thread::Builder::new()
+            .name(format!("pty_event_subscription_{}", id))
+            .spawn(move || loop {
+                if let Ok(event) = event_receiver.recv() {
+                    if let Event::Exit = event {
+                        break;
+                    }
+                    else {
+                        if let Some(app_handle) = crate::APP_HANDLE.read().unwrap().clone() {
+                            let term = crate::TERM.lock().unwrap();
+                            let content = terminal_instance_to_string(&term);
+                            let payload = TerminalScreen {
+                                cols: term.cols,
+                                rows: term.rows,
+                                content: content
+                            };
+                            let payload = TerminalDownMsg::FullTermUpdate(payload);
+                            let payload = serde_json::json!(payload);
+                            app_handle.emit("term_content", payload).unwrap();
+                        }
+                    }
+                }
+            })?;
+        Ok(ATerm {
+            term,
+            rows,
+            cols,
+            tx: notifier,
+            rx: pty_proxy_receiver,
+        })
+    }
+}
+
+pub fn terminal_instance_to_string(terminal_instance: &ATerm) -> String {
+    let (rows, cols) = (terminal_instance.rows, terminal_instance.cols);
+    let term = terminal_instance.term.lock();
+    let grid = term.grid().clone();
+
+    return term_grid_to_string(&grid, rows, cols);
+}
+
+fn term_grid_to_string(grid: &Grid<Cell>, rows: u16, cols: u16) -> String {
+    let mut term_content = String::with_capacity((rows*cols) as usize);
+
+    // Populate string from grid
+    for indexed in grid.display_iter() {
+        let x = indexed.point.column.0 as usize;
+        let y = indexed.point.line.0 as usize;
+        if y < rows as usize && x < cols as usize {
+            term_content.push(indexed.c);
+        }
+    }
+    return term_content;
+}

src-tauri/src/component_manager.rs

@@ -1,125 +1,2 @@
-use crate::{AddedDecodersCount, DecoderPath, RemovedDecodersCount};
+pub mod decoders;
-use once_cell::sync::Lazy;
+pub mod diagram_connectors;
-use std::sync::Arc;
-use tauri::async_runtime::{Mutex, RwLock};
-use wasmtime::component::{Component as WasmtimeComponent, *};
-use wasmtime::{AsContextMut, Engine, Store};
-use wasmtime_wasi::{WasiCtx, WasiView};
-
-bindgen!();
-
-pub static DECODERS: Lazy<Arc<RwLock<Vec<Component>>>> = Lazy::new(<_>::default);
-static ENGINE: Lazy<Engine> = Lazy::new(<_>::default);
-static LINKER: Lazy<Linker<State>> = Lazy::new(|| {
-    let mut linker = Linker::new(&ENGINE);
-    wasmtime_wasi::add_to_linker_sync(&mut linker).unwrap();
-    Component::add_to_linker(&mut linker, |state: &mut State| state).unwrap();
-    linker
-});
-pub static STORE: Lazy<Arc<Mutex<Store<State>>>> = Lazy::new(|| {
-    let store = Store::new(
-        &ENGINE,
-        State {
-            ctx: WasiCtx::builder().build(),
-            table: ResourceTable::new(),
-        },
-    );
-    Arc::new(Mutex::new(store))
-});
-
-pub struct State {
-    ctx: WasiCtx,
-    table: ResourceTable,
-}
-
-impl WasiView for State {
-    fn ctx(&mut self) -> &mut WasiCtx {
-        &mut self.ctx
-    }
-    fn table(&mut self) -> &mut ResourceTable {
-        &mut self.table
-    }
-}
-
-impl component::decoder::host::Host for State {
-    fn log(&mut self, message: String) {
-        println!("Decoder: {message}");
-    }
-}
-
-pub async fn remove_all_decoders() -> RemovedDecodersCount {
-    let mut decoders = DECODERS.write().await;
-    let decoders_count = decoders.len();
-    decoders.clear();
-    decoders_count
-}
-
-// @TODO Make println work on Windows in release mode?
-// https://github.com/tauri-apps/tauri/discussions/8626
-
-// @TODO Remove / improve comments below
-// Testing
-//
-// Rust
-// FW.add_decoders(["../test_files/components/rust_decoder/rust_decoder.wasm"])
-// FW.add_decoders(["../test_files/components/rust_decoder/rust_decoder.wasm", "../test_files/components/rust_decoder/rust_decoder.wasm"])
-//
-// JS
-// FW.add_decoders(["../test_files/components/javascript_decoder/javascript_decoder.wasm"])
-//
-// Python
-// FW.add_decoders(["../test_files/components/python_decoder/python_decoder.wasm"])
-//
-// Remove all
-// FW.remove_all_decoders()
-//
-// All Debug
-// FW.add_decoders(["../test_files/components/rust_decoder/rust_decoder.wasm", "../test_files/components/javascript_decoder/javascript_decoder.wasm", "../test_files/components/python_decoder/python_decoder.wasm"])
-//
-// All Release
-// FW.add_decoders(["../../test_files/components/rust_decoder/rust_decoder.wasm", "../../test_files/components/javascript_decoder/javascript_decoder.wasm", "../../test_files/components/python_decoder/python_decoder.wasm"])
-pub async fn add_decoders(decoder_paths: Vec<DecoderPath>) -> AddedDecodersCount {
-    println!("Decoders: {decoder_paths:#?}");
-    println!("Current dir: {:#?}", std::env::current_dir().unwrap());
-
-    let mut added_decoders_count = 0;
-
-    // @TODO (?) New thread to prevent "Cannot start a runtime from within a runtime."
-    // when a call to a component fails / panics
-    // std::thread::spawn(move || {
-    // futures::executor::block_on(async move {
-    for decoder_path in decoder_paths {
-        if let Err(error) = add_decoder(&decoder_path).await {
-            eprintln!("add_decoders error: {error:?}");
-        } else {
-            added_decoders_count += 1;
-        }
-    }
-    // })
-    // }).join().unwrap();
-
-    added_decoders_count
-}
-
-async fn add_decoder(path: &str) -> wasmtime::Result<()> {
-    let wasmtime_component = WasmtimeComponent::from_file(&ENGINE, path)?;
-
-    let mut store_lock = STORE.lock().await;
-    let mut store = store_lock.as_context_mut();
-
-    let component = Component::instantiate(&mut store, &wasmtime_component, &LINKER)?;
-
-    println!(
-        "Decoder name: {}",
-        component
-            .component_decoder_decoder()
-            .call_name(&mut store)?
-    );
-    component
-        .component_decoder_decoder()
-        .call_init(&mut store)?;
-
-    DECODERS.write().await.push(component);
-
-    Ok(())
-}

src-tauri/src/component_manager/decoders.rs

@@ -0,0 +1,125 @@
+use crate::{AddedDecodersCount, DecoderPath, RemovedDecodersCount};
+use once_cell::sync::Lazy;
+use std::sync::Arc;
+use tauri::async_runtime::{Mutex, RwLock};
+use wasmtime::component::{Component as WasmtimeComponent, *};
+use wasmtime::{AsContextMut, Engine, Store};
+use wasmtime_wasi::{WasiCtx, WasiView};
+
+bindgen!(in "wit/decoder");
+
+pub static DECODERS: Lazy<Arc<RwLock<Vec<Component>>>> = Lazy::new(<_>::default);
+static ENGINE: Lazy<Engine> = Lazy::new(<_>::default);
+static LINKER: Lazy<Linker<State>> = Lazy::new(|| {
+    let mut linker = Linker::new(&ENGINE);
+    wasmtime_wasi::add_to_linker_sync(&mut linker).unwrap();
+    Component::add_to_linker(&mut linker, |state: &mut State| state).unwrap();
+    linker
+});
+pub static STORE: Lazy<Arc<Mutex<Store<State>>>> = Lazy::new(|| {
+    let store = Store::new(
+        &ENGINE,
+        State {
+            ctx: WasiCtx::builder().build(),
+            table: ResourceTable::new(),
+        },
+    );
+    Arc::new(Mutex::new(store))
+});
+
+pub struct State {
+    ctx: WasiCtx,
+    table: ResourceTable,
+}
+
+impl WasiView for State {
+    fn ctx(&mut self) -> &mut WasiCtx {
+        &mut self.ctx
+    }
+    fn table(&mut self) -> &mut ResourceTable {
+        &mut self.table
+    }
+}
+
+impl component::decoder::host::Host for State {
+    fn log(&mut self, message: String) {
+        println!("Decoder: {message}");
+    }
+}
+
+pub async fn remove_all_decoders() -> RemovedDecodersCount {
+    let mut decoders = DECODERS.write().await;
+    let decoders_count = decoders.len();
+    decoders.clear();
+    decoders_count
+}
+
+// @TODO Make println work on Windows in release mode?
+// https://github.com/tauri-apps/tauri/discussions/8626
+
+// @TODO Remove / improve comments below
+// Testing
+//
+// Rust
+// FW.add_decoders(["../test_files/components/rust_decoder/rust_decoder.wasm"])
+// FW.add_decoders(["../test_files/components/rust_decoder/rust_decoder.wasm", "../test_files/components/rust_decoder/rust_decoder.wasm"])
+//
+// JS
+// FW.add_decoders(["../test_files/components/javascript_decoder/javascript_decoder.wasm"])
+//
+// Python
+// FW.add_decoders(["../test_files/components/python_decoder/python_decoder.wasm"])
+//
+// Remove all
+// FW.remove_all_decoders()
+//
+// All Debug
+// FW.add_decoders(["../test_files/components/rust_decoder/rust_decoder.wasm", "../test_files/components/javascript_decoder/javascript_decoder.wasm", "../test_files/components/python_decoder/python_decoder.wasm"])
+//
+// All Release
+// FW.add_decoders(["../../test_files/components/rust_decoder/rust_decoder.wasm", "../../test_files/components/javascript_decoder/javascript_decoder.wasm", "../../test_files/components/python_decoder/python_decoder.wasm"])
+pub async fn add_decoders(decoder_paths: Vec<DecoderPath>) -> AddedDecodersCount {
+    println!("Decoders: {decoder_paths:#?}");
+    println!("Current dir: {:#?}", std::env::current_dir().unwrap());
+
+    let mut added_decoders_count = 0;
+
+    // @TODO (?) New thread to prevent "Cannot start a runtime from within a runtime."
+    // when a call to a component fails / panics
+    // std::thread::spawn(move || {
+    // futures::executor::block_on(async move {
+    for decoder_path in decoder_paths {
+        if let Err(error) = add_decoder(&decoder_path).await {
+            eprintln!("add_decoders error: {error:?}");
+        } else {
+            added_decoders_count += 1;
+        }
+    }
+    // })
+    // }).join().unwrap();
+
+    added_decoders_count
+}
+
+async fn add_decoder(path: &str) -> wasmtime::Result<()> {
+    let wasmtime_component = WasmtimeComponent::from_file(&ENGINE, path)?;
+
+    let mut store_lock = STORE.lock().await;
+    let mut store = store_lock.as_context_mut();
+
+    let component = Component::instantiate(&mut store, &wasmtime_component, &LINKER)?;
+
+    println!(
+        "Decoder name: {}",
+        component
+            .component_decoder_decoder()
+            .call_name(&mut store)?
+    );
+    component
+        .component_decoder_decoder()
+        .call_init(&mut store)?;
+
+    DECODERS.write().await.push(component);
+
+    Ok(())
+}

src-tauri/src/component_manager/diagram_connectors.rs

@@ -0,0 +1,273 @@
+use crate::{
+    AddedDiagramConnectorsCount, ComponentId, DiagramConnectorName, DiagramConnectorPath,
+    RemovedDiagramConnectorsCount, APP_HANDLE, WAVEFORM,
+};
+use once_cell::sync::Lazy;
+use shared::{DiagramConnectorMessage, VarFormat};
+use std::sync::Arc;
+use tauri::async_runtime::{Mutex, RwLock};
+use tauri::Emitter;
+use wasmtime::component::{Component as WasmtimeComponent, *};
+use wasmtime::{AsContextMut, Engine, Store};
+use wasmtime_wasi::{WasiCtx, WasiView};
+use wellen::GetItem;
+
+bindgen!(in "wit/diagram_connector");
+
+pub static DIAGRAM_CONNECTORS: Lazy<Arc<RwLock<Vec<Component>>>> = Lazy::new(<_>::default);
+static ENGINE: Lazy<Engine> = Lazy::new(<_>::default);
+static LINKER: Lazy<Linker<State>> = Lazy::new(|| {
+    let mut linker = Linker::new(&ENGINE);
+    wasmtime_wasi::add_to_linker_sync(&mut linker).unwrap();
+    Component::add_to_linker(&mut linker, |state: &mut State| state).unwrap();
+    linker
+});
+pub static STORE: Lazy<Arc<Mutex<Store<State>>>> = Lazy::new(|| {
+    let store = Store::new(
+        &ENGINE,
+        State {
+            ctx: WasiCtx::builder().build(),
+            table: ResourceTable::new(),
+        },
+    );
+    Arc::new(Mutex::new(store))
+});
+
+pub struct State {
+    ctx: WasiCtx,
+    table: ResourceTable,
+}
+
+impl WasiView for State {
+    fn ctx(&mut self) -> &mut WasiCtx {
+        &mut self.ctx
+    }
+    fn table(&mut self) -> &mut ResourceTable {
+        &mut self.table
+    }
+}
+
+impl component::diagram_connector::host::Host for State {
+    fn log(&mut self, message: String) {
+        println!("Diagram Connector: {message}");
+    }
+
+    fn listen_for_component_text_changes(
+        &mut self,
+        diagram_connector_name: String,
+        component_id: String,
+    ) {
+        let message = DiagramConnectorMessage::ListenForComponentTextChanges {
+            diagram_connector_name,
+            component_id,
+        };
+        APP_HANDLE
+            .read()
+            .unwrap()
+            .as_ref()
+            .unwrap()
+            .emit("diagram_connector_message", message)
+            .unwrap();
+    }
+
+    fn set_component_text(&mut self, component_id: String, text: String) {
+        let message = DiagramConnectorMessage::SetComponentText { component_id, text };
+        APP_HANDLE
+            .read()
+            .unwrap()
+            .as_ref()
+            .unwrap()
+            .emit("diagram_connector_message", message)
+            .unwrap();
+    }
+
+    // @TODO `resource` in WIT or async in the future
+    // @TODO move business logic to the diagram connector
+    fn address_and_way(&mut self, time_text: String) -> Result<(String, Option<u32>), ()> {
+        let input_time = time_text.parse::<u64>().map_err(|error| {
+            eprintln!("Failed to parse time_text '{time_text}', error: {error:#}");
+        })?;
+
+        let waveform_wrapper = WAVEFORM.read().unwrap();
+        let mut maybe_waveform = waveform_wrapper.try_write().unwrap();
+        let waveform = maybe_waveform.as_mut().unwrap();
+
+        let hierarchy = waveform.hierarchy();
+
+        // @TODO remove
+        // let timescale = hierarchy.timescale().unwrap();
+        // println!("Timescale: {timescale:#?}");
+
+        let refill_valid_ref = hierarchy
+            .lookup_var(
+                &["TOP", "VexiiRiscv"],
+                &"FetchL1Plugin_logic_refill_start_valid",
+            )
+            .unwrap();
+        let refill_address_ref = hierarchy
+            .lookup_var(
+                &["TOP", "VexiiRiscv"],
+                &"FetchL1Plugin_logic_refill_start_address",
+            )
+            .unwrap();
+        let refill_way_ref = hierarchy
+            .lookup_var(
+                &["TOP", "VexiiRiscv"],
+                &"FetchL1Plugin_logic_refill_start_wayToAllocate",
+            )
+            .unwrap();
+
+        let refill_valid_var = hierarchy.get(refill_valid_ref);
+        let refill_address_var = hierarchy.get(refill_address_ref);
+        let refill_way_var = hierarchy.get(refill_way_ref);
+
+        let refill_valid_signal_ref = refill_valid_var.signal_ref();
+        let refill_address_signal_ref = refill_address_var.signal_ref();
+        let refill_way_signal_ref = refill_way_var.signal_ref();
+
+        let mut time_table_idx = None;
+        for (idx, time) in waveform.time_table().iter().enumerate() {
+            if *time >= input_time {
+                time_table_idx = Some(idx as u32);
+                break;
+            }
+        }
+        let Some(time_table_idx) = time_table_idx else {
+            eprintln!("time_table_idx is None");
+            Err(())?
+        };
+
+        waveform.load_signals_multi_threaded(&[
+            refill_valid_signal_ref,
+            refill_address_signal_ref,
+            refill_way_signal_ref,
+        ]);
+
+        let refill_valid_signal = waveform.get_signal(refill_valid_signal_ref).unwrap();
+        let refill_valid_offset = refill_valid_signal.get_offset(time_table_idx).unwrap();
+        let refill_valid_value = refill_valid_signal
+            .get_value_at(&refill_valid_offset, 0)
+            .to_string();
+
+        let refill_address_signal = waveform.get_signal(refill_address_signal_ref).unwrap();
+        let refill_address_offset = refill_address_signal.get_offset(time_table_idx).unwrap();
+        let refill_address_value = refill_address_signal.get_value_at(&refill_address_offset, 0);
+        let refill_address_value = VarFormat::Hexadecimal.format(refill_address_value);
+
+        if refill_valid_value == "0" {
+            return Ok((refill_address_value, None));
+        }
+
+        let refill_way_signal = waveform.get_signal(refill_way_signal_ref).unwrap();
+        let refill_way_offset = refill_way_signal.get_offset(time_table_idx).unwrap();
+        let refill_way_value = refill_way_signal.get_value_at(&refill_way_offset, 0);
+        let refill_way_value = VarFormat::Unsigned.format(refill_way_value);
+
+        Ok((
+            refill_address_value,
+            Some(refill_way_value.parse().unwrap()),
+        ))
+    }
+}
+
+pub async fn remove_all_diagram_connectors() -> RemovedDiagramConnectorsCount {
+    let mut diagram_connectors = DIAGRAM_CONNECTORS.write().await;
+    let diagram_connectors_count = diagram_connectors.len();
+    diagram_connectors.clear();
+    diagram_connectors_count
+}
+
+// @TODO Make println work on Windows in release mode?
+// https://github.com/tauri-apps/tauri/discussions/8626
+
+// @TODO Remove / improve comments below
+// Testing
+//
+// Rust
+// FW.add_diagram_connectors(["../test_files/components/rust_diagram_connector/rust_diagram_connector.wasm"])
+//
+// Remove all
+// FW.remove_all_diagram_connectors()
+//
+// All Debug
+// FW.add_diagram_connectors(["../test_files/components/rust_diagram_connector/rust_diagram_connector.wasm"])
+//
+// All Release
+// FW.add_diagram_connectors(["../../test_files/components/rust_diagram_connector/rust_diagram_connector.wasm"])
+pub async fn add_diagram_connectors(
+    diagram_connector_paths: Vec<DiagramConnectorPath>,
+) -> AddedDiagramConnectorsCount {
+    println!("Diagram Connectors: {diagram_connector_paths:#?}");
+    println!("Current dir: {:#?}", std::env::current_dir().unwrap());
+
+    let mut added_diagram_connectors_count = 0;
+
+    // @TODO (?) New thread to prevent "Cannot start a runtime from within a runtime."
+    // when a call to a component fails / panics
+    // std::thread::spawn(move || {
+    // futures::executor::block_on(async move {
+    for diagram_connector_path in diagram_connector_paths {
+        if let Err(error) = add_diagram_connector(&diagram_connector_path).await {
+            eprintln!("add_diagram_connectors error: {error:?}");
+        } else {
+            added_diagram_connectors_count += 1;
+        }
+    }
+    // })
+    // }).join().unwrap();
+
+    added_diagram_connectors_count
+}
+
+async fn add_diagram_connector(path: &str) -> wasmtime::Result<()> {
+    let wasmtime_component = WasmtimeComponent::from_file(&ENGINE, path)?;
+
+    let mut store_lock = STORE.lock().await;
+    let mut store = store_lock.as_context_mut();
+
+    let component = Component::instantiate(&mut store, &wasmtime_component, &LINKER)?;
+
+    println!(
+        "Diagram Connector name: {}",
+        component
+            .component_diagram_connector_diagram_connector()
+            .call_name(&mut store)?
+    );
+    component
+        .component_diagram_connector_diagram_connector()
+        .call_init(&mut store)?;
+
+    DIAGRAM_CONNECTORS.write().await.push(component);
+
+    Ok(())
+}
+
+// @TODO rename `ComponentId` everywhere to something like `DiagramElementId`?
+// @TODO get rid of unwraps
+pub async fn notify_diagram_connector_text_change(
+    diagram_connector: DiagramConnectorName,
+    component_id: ComponentId,
+    text: String,
+) {
+    let mut store_lock = STORE.lock().await;
+    let mut store = store_lock.as_context_mut();
+
+    let diagram_connectors = DIAGRAM_CONNECTORS.read().await;
+
+    // @TODO store diagram_collectors in a hashmap/btreemap?
+    let diagram_connector = diagram_connectors
+        .iter()
+        .find(|diagram_collector| {
+            let name = diagram_collector
+                .component_diagram_connector_diagram_connector()
+                .call_name(&mut store)
+                .unwrap();
+            name == diagram_connector
+        })
+        .unwrap();
+
+    diagram_connector
+        .component_diagram_connector_diagram_connector()
+        .call_on_component_text_changed(&mut store, &component_id, &text)
+        .unwrap();
+}

src-tauri/src/lib.rs

@@ -1,20 +1,46 @@
+use once_cell::sync::Lazy;
 use std::fs;
-use tauri::async_runtime::RwLock;
+use std::process::Command;
+use std::sync::{Arc, RwLock as StdRwLock};
+use std::time::Duration;
+use tauri::{async_runtime::RwLock, AppHandle};
 use tauri_plugin_dialog::DialogExt;
+use tokio::time::sleep;
 use wasmtime::AsContextMut;
 use wellen::simple::Waveform;
+use tauri::Emitter;
 
 type Filename = String;
 type JavascriptCode = String;
+
 type AddedDecodersCount = usize;
 type RemovedDecodersCount = usize;
 type DecoderPath = String;
 
+type AddedDiagramConnectorsCount = usize;
+type RemovedDiagramConnectorsCount = usize;
+type DiagramConnectorPath = String;
+type DiagramConnectorName = String;
+type ComponentId = String;
+use alacritty_terminal::event::Notify;
+use shared::term::{TerminalDownMsg, TerminalScreen};
+
 mod component_manager;
+mod aterm;
+mod terminal_size;
+use std::sync::Mutex;
+
+pub static APP_HANDLE: Lazy<Arc<StdRwLock<Option<AppHandle>>>> = Lazy::new(<_>::default);
+pub static WAVEFORM: Lazy<StdRwLock<Arc<RwLock<Option<Waveform>>>>> = Lazy::new(<_>::default);
+
+static TERM: Lazy<Mutex<aterm::ATerm>> = Lazy::new(|| {
+    Mutex::new(aterm::ATerm::new().expect("Failed to initialize ATerm"))
+});
 
 #[derive(Default)]
 struct Store {
-    waveform: RwLock<Option<Waveform>>,
+    waveform: Arc<RwLock<Option<Waveform>>>,
+    val     : Arc<RwLock<bool>>,
 }
 
 #[tauri::command(rename_all = "snake_case")]
@@ -27,26 +53,30 @@ async fn pick_and_load_waveform(
     store: tauri::State<'_, Store>,
     app: tauri::AppHandle,
 ) -> Result<Option<Filename>, ()> {
-    let Some(file_response) = app.dialog().file().blocking_pick_file() else {
+    let Some(file_path) = app.dialog().file().blocking_pick_file() else {
         return Ok(None);
     };
-    let file_path = file_response.path.as_os_str().to_str().unwrap();
+    let file_buf = file_path.into_path().unwrap();
+    let file_str = file_buf.as_os_str().to_str().unwrap();
     // @TODO `read` should accept `Path` instead of `&str`
-    let waveform = wellen::simple::read(file_path);
+    let waveform = wellen::simple::read(file_str);
     let Ok(waveform) = waveform else {
         panic!("Waveform file reading failed")
     };
     *store.waveform.write().await = Some(waveform);
-    Ok(Some(file_response.name.unwrap()))
+    *WAVEFORM.write().unwrap() = Arc::clone(&store.waveform);
+    Ok(Some(
+        file_buf.file_name().unwrap().to_string_lossy().to_string(),
+    ))
 }
 
 #[tauri::command(rename_all = "snake_case")]
 async fn load_file_with_selected_vars(app: tauri::AppHandle) -> Result<Option<JavascriptCode>, ()> {
-    let Some(file_response) = app.dialog().file().blocking_pick_file() else {
+    let Some(file_path) = app.dialog().file().blocking_pick_file() else {
         return Ok(None);
     };
     // @TODO Tokio's `fs` or a Tauri `fs`?
-    let Ok(javascript_code) = fs::read_to_string(file_response.path) else {
+    let Ok(javascript_code) = fs::read_to_string(file_path.into_path().unwrap()) else {
         panic!("Selected vars file reading failed")
     };
     Ok(Some(javascript_code))
@@ -92,8 +122,8 @@ async fn load_signal_and_get_timeline(
                 // @TODO Workaround? Is it a problem only for non-Rust components? Is it needed only when there is a problem in the component (e.g. "`Err` value: wasm trap: cannot enter component instance"?)
                 // let value = std::thread::spawn(move || {
                 // futures::executor::block_on(async move {
-                let decoders = component_manager::DECODERS.read().await;
+                let decoders = component_manager::decoders::DECODERS.read().await;
-                let mut store_lock = component_manager::STORE.lock().await;
+                let mut store_lock = component_manager::decoders::STORE.lock().await;
                 let mut store = store_lock.as_context_mut();
 
                 for decoder in decoders.iter() {
@@ -125,14 +155,132 @@ async fn unload_signal(signal_ref_index: usize, store: tauri::State<'_, Store>)
     Ok(())
 }
 
+#[tauri::command(rename_all = "snake_case")]
+async fn send_char(c : String) -> Result<(), ()> {
+    if c.len() == 1 {
+        let term = TERM.lock().unwrap();
+        term.tx.notify(c.into_bytes());
+        Ok(())
+    } else {
+        Err(())
+    }
+}
+
 #[tauri::command(rename_all = "snake_case")]
 async fn add_decoders(decoder_paths: Vec<DecoderPath>) -> Result<AddedDecodersCount, ()> {
-    Ok(component_manager::add_decoders(decoder_paths).await)
+    Ok(component_manager::decoders::add_decoders(decoder_paths).await)
 }
 
 #[tauri::command(rename_all = "snake_case")]
 async fn remove_all_decoders() -> Result<RemovedDecodersCount, ()> {
-    Ok(component_manager::remove_all_decoders().await)
+    Ok(component_manager::decoders::remove_all_decoders().await)
+}
+
+#[tauri::command(rename_all = "snake_case")]
+async fn add_diagram_connectors(
+    diagram_connector_paths: Vec<DiagramConnectorPath>,
+) -> Result<AddedDiagramConnectorsCount, ()> {
+    Ok(
+        component_manager::diagram_connectors::add_diagram_connectors(diagram_connector_paths)
+            .await,
+    )
+}
+
+#[tauri::command(rename_all = "snake_case")]
+async fn remove_all_diagram_connectors() -> Result<RemovedDiagramConnectorsCount, ()> {
+    Ok(component_manager::diagram_connectors::remove_all_diagram_connectors().await)
+}
+
+#[tauri::command(rename_all = "snake_case")]
+async fn notify_diagram_connector_text_change(
+    diagram_connector: DiagramConnectorName,
+    component_id: ComponentId,
+    text: String,
+) -> Result<(), ()> {
+    Ok(
+        component_manager::diagram_connectors::notify_diagram_connector_text_change(
+            diagram_connector,
+            component_id,
+            text,
+        )
+        .await,
+    )
+}
+
+#[tauri::command(rename_all = "snake_case")]
+async fn open_konata_file(app: tauri::AppHandle) {
+    let Some(file_path) = app.dialog().file().blocking_pick_file() else {
+        return;
+    };
+    let file_str = file_path
+        .into_path()
+        .unwrap()
+        .into_os_string()
+        .into_string()
+        .unwrap();
+
+    let port = 30000;
+    let base_url = format!("http://localhost:{port}");
+    let client = reqwest::Client::builder()
+        .connect_timeout(Duration::from_secs(1))
+        .build()
+        .unwrap();
+
+    let mut konata_server_ready = false;
+
+    let is_konata_server_ready = || async {
+        client
+            .get(format!("{base_url}/status"))
+            .send()
+            .await
+            .is_ok()
+    };
+
+    if is_konata_server_ready().await {
+        konata_server_ready = true;
+    } else {
+        spawn_konata_app();
+    }
+
+    let mut attempts = 1;
+    while !konata_server_ready {
+        attempts += 1;
+        if attempts > 5 {
+            eprintln!("Failed to get Konata server status (5 attempts)");
+            return;
+        }
+        konata_server_ready = is_konata_server_ready().await;
+        sleep(Duration::from_secs(1)).await;
+    }
+
+    client
+        .post(format!("{base_url}/open-konata-file"))
+        .json(&serde_json::json!({
+            "file_path": file_str
+        }))
+        .send()
+        .await
+        .unwrap()
+        .error_for_status()
+        .unwrap();
+}
+
+#[cfg(target_family = "windows")]
+fn spawn_konata_app() {
+    Command::new("cscript")
+        .current_dir("../../Konata")
+        .arg("konata.vbs")
+        .spawn()
+        .unwrap();
+}
+
+#[cfg(target_family = "unix")]
+fn spawn_konata_app() {
+    Command::new("sh")
+        .current_dir("../../Konata")
+        .arg("konata.sh")
+        .spawn()
+        .unwrap();
 }
 
 #[cfg_attr(mobile, tauri::mobile_entry_point)]
@@ -145,7 +293,7 @@ pub fn run() {
         .manage(Store::default())
         .plugin(tauri_plugin_window_state::Builder::default().build())
         .plugin(tauri_plugin_dialog::init())
-        // Npte: Add all handlers to `frontend/src/tauri_bridge.rs`
+        // Note: Add all handlers to `frontend/src/tauri_bridge.rs`
         .invoke_handler(tauri::generate_handler![
             show_window,
             pick_and_load_waveform,
@@ -153,9 +301,39 @@ pub fn run() {
             get_hierarchy,
             load_signal_and_get_timeline,
             unload_signal,
+            send_char,
             add_decoders,
             remove_all_decoders,
+            add_diagram_connectors,
+            remove_all_diagram_connectors,
+            notify_diagram_connector_text_change,
+            open_konata_file,
         ])
+        .setup(|app| {
+            *APP_HANDLE.write().unwrap() = Some(app.handle().to_owned());
+            println!("Setting up yay!");
+
+            std::thread::spawn(move || {
+                // Simulate emitting a message after a delay
+                std::thread::sleep(std::time::Duration::from_secs(1));
+
+                //tart term and send initial update to backend
+                if let Some(app_handle) = crate::APP_HANDLE.read().unwrap().clone() {
+                    let term = crate::TERM.lock().unwrap();
+                    let content = crate::aterm::terminal_instance_to_string(&term);
+                    let payload = TerminalScreen {
+                        cols: term.cols,
+                        rows: term.rows,
+                        content: content
+                    };
+                    let payload = TerminalDownMsg::FullTermUpdate(payload);
+                    let payload = serde_json::json!(payload);
+                    app_handle.emit("term_content", payload).unwrap();
+                }
+            });
+
+            Ok(())
+        })
         .run(tauri::generate_context!())
         .expect("error while running tauri application");
 }

src-tauri/src/main.rs

@@ -1,6 +1,8 @@
 // Prevents additional console window on Windows in release, DO NOT REMOVE!!
 #![cfg_attr(not(debug_assertions), windows_subsystem = "windows")]
 
+mod terminal_size;
+
 fn main() {
     app_lib::run();
 }

src-tauri/src/terminal_size.rs

@@ -0,0 +1,55 @@
+use alacritty_terminal::event::{WindowSize};
+use alacritty_terminal::grid::{Dimensions};
+use alacritty_terminal::index::{Column, Line};
+
+#[derive(Clone, Copy, Debug)]
+pub struct TerminalSize {
+    pub cell_width: u16,
+    pub cell_height: u16,
+    pub num_cols: u16,
+    pub num_lines: u16,
+}
+
+impl TerminalSize {
+    pub fn new(rows : u16, cols : u16) -> Self {
+        Self {
+            cell_width: 1,
+            cell_height: 1,
+            num_cols: cols,
+            num_lines: rows,
+        }
+    }
+}
+
+impl Dimensions for TerminalSize {
+    fn total_lines(&self) -> usize {
+        self.screen_lines()
+    }
+
+    fn screen_lines(&self) -> usize {
+        self.num_lines as usize
+    }
+
+    fn columns(&self) -> usize {
+        self.num_cols as usize
+    }
+
+    fn last_column(&self) -> Column {
+        Column(self.num_cols as usize - 1)
+    }
+
+    fn bottommost_line(&self) -> Line {
+        Line(self.num_lines as i32 - 1)
+    }
+}
+
+impl From<TerminalSize> for WindowSize {
+    fn from(size: TerminalSize) -> Self {
+        Self {
+            num_lines: size.num_lines,
+            num_cols: size.num_cols,
+            cell_width: size.cell_width,
+            cell_height: size.cell_height,
+        }
+    }
+}

src-tauri/wit/diagram_connector/world.wit

@@ -0,0 +1,19 @@
+package component:diagram-connector;
+
+interface host {
+    log: func(message: string);
+    listen-for-component-text-changes: func(diagram-connect-name: string, component-id: string);
+    set-component-text: func(component-id: string, text: string);
+    address-and-way: func(time-text: string) -> result<tuple<string, option<u32>>>;
+}
+
+interface diagram-connector {
+    init: func();
+    name: func() -> string;
+    on-component-text-changed: func(component-id: string, text: string);
+}
+
+world component {
+    import host;
+    export diagram-connector;
+}

test_files/.gitignore

@@ -0,0 +1 @@
+sv39_mmu_cache_sim/

test_files/cache_diagram.excalidraw

@@ -0,0 +1,431 @@
+{
+  "type": "excalidraw",
+  "version": 2,
+  "source": "http://localhost:8080",
+  "elements": [
+    {
+      "type": "text",
+      "version": 174,
+      "versionNonce": 1552336377,
+      "isDeleted": false,
+      "id": "xPhIioz8O3Vjc7QcLfYes",
+      "fillStyle": "solid",
+      "strokeWidth": 2,
+      "strokeStyle": "solid",
+      "roughness": 0,
+      "opacity": 100,
+      "angle": 0,
+      "x": 60,
+      "y": 120,
+      "strokeColor": "#1e1e1e",
+      "backgroundColor": "transparent",
+      "width": 1153.125,
+      "height": 57.599999999999994,
+      "seed": 1317703821,
+      "groupIds": [],
+      "frameId": null,
+      "roundness": null,
+      "boundElements": [],
+      "updated": 1732565113996,
+      "link": null,
+      "locked": false,
+      "fontSize": 16,
+      "fontFamily": 3,
+      "text": "1. Extract 'test_files/sv39_mmu_cache_sim.zip' to 'test_files/sv39_mmu_cache_sim'\n2. Load file 'test_files/sv39_mmu_cache_sim/fst/wave.fst'\n3. Run command 'FW.add_diagram_connectors([\"../test_files/components/rust_diagram_connector/rust_diagram_connector.wasm\"])'",
+      "textAlign": "left",
+      "verticalAlign": "top",
+      "containerId": null,
+      "originalText": "1. Extract 'test_files/sv39_mmu_cache_sim.zip' to 'test_files/sv39_mmu_cache_sim'\n2. Load file 'test_files/sv39_mmu_cache_sim/fst/wave.fst'\n3. Run command 'FW.add_diagram_connectors([\"../test_files/components/rust_diagram_connector/rust_diagram_connector.wasm\"])'",
+      "lineHeight": 1.2,
+      "baseline": 54
+    },
+    {
+      "type": "rectangle",
+      "version": 133,
+      "versionNonce": 631769070,
+      "isDeleted": false,
+      "id": "WORIbkpEkf5c85sK8DhU-",
+      "fillStyle": "solid",
+      "strokeWidth": 4,
+      "strokeStyle": "solid",
+      "roughness": 0,
+      "opacity": 100,
+      "angle": 0,
+      "x": 460,
+      "y": 220,
+      "strokeColor": "#1e1e1e",
+      "backgroundColor": "#a5d8ff",
+      "width": 300,
+      "height": 440.00000000000006,
+      "seed": 1957721512,
+      "groupIds": [],
+      "frameId": null,
+      "roundness": {
+        "type": 3
+      },
+      "boundElements": [],
+      "updated": 1732565668461,
+      "link": null,
+      "locked": false
+    },
+    {
+      "type": "text",
+      "version": 90,
+      "versionNonce": 1920851711,
+      "isDeleted": false,
+      "id": "mBGA6gGm1aDhGnBNB8gPz",
+      "fillStyle": "solid",
+      "strokeWidth": 2,
+      "strokeStyle": "solid",
+      "roughness": 0,
+      "opacity": 100,
+      "angle": 0,
+      "x": 541.5560073852539,
+      "y": 260,
+      "strokeColor": "#1e1e1e",
+      "backgroundColor": "transparent",
+      "width": 144.50794982910156,
+      "height": 35,
+      "seed": 1040757672,
+      "groupIds": [],
+      "frameId": null,
+      "roundness": null,
+      "boundElements": [],
+      "updated": 1732566083274,
+      "link": null,
+      "locked": false,
+      "fontSize": 28,
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+      "boundElements": [],
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+      "link": null,
+      "locked": false,
+      "fontSize": 20,
+      "fontFamily": 3,
+      "text": "       UNKNOWN       ",
+      "textAlign": "center",
+      "verticalAlign": "middle",
+      "containerId": "4l74x5uAeTeBuxx_8t_QY",
+      "originalText": "       UNKNOWN       ",
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+    }
+  ],
+  "appState": {
+    "gridSize": 20,
+    "viewBackgroundColor": "#f5faff"
+  },
+  "files": {}
+}

test_files/components/rust_diagram_connector/.vscode/settings.json

@@ -0,0 +1,10 @@
+{
+    "rust-analyzer.check.overrideCommand": [
+        "cargo",
+        "component",
+        "check",
+        "--workspace",
+        "--all-targets",
+        "--message-format=json"
+    ],
+}

test_files/components/rust_diagram_connector/Cargo.toml

@@ -0,0 +1,26 @@
+[package]
+name = "rust_diagram_connector"
+version.workspace = true
+edition.workspace = true
+repository.workspace = true
+authors.workspace = true
+readme.workspace = true
+publish.workspace = true
+
+[dependencies]
+wit-bindgen-rt = { version = "0.26.0", features = ["bitflags"] }
+
+[lib]
+crate-type = ["cdylib"]
+
+[profile.release]
+codegen-units = 1
+opt-level = "s"
+debug = false
+strip = true
+lto = true
+
+[package.metadata.component]
+package = "component:rust-diagram-connector"
+
+[package.metadata.component.dependencies]

test_files/components/rust_diagram_connector/README.md

@@ -0,0 +1,7 @@
+How to create and build the Rust component:
+
+1. `cargo install cargo-component`
+2. `cargo component new rust_diagram_connector --lib`
+3. `cd rust_diagram_connector`
+4. Update code as needed
+5. `cargo component build --release --target wasm32-unknown-unknown && cp ../../../target/wasm32-unknown-unknown/release/rust_diagram_connector.wasm .`

test_files/components/rust_diagram_connector/src/bindings.rs

@@ -0,0 +1,329 @@
+// Generated by `wit-bindgen` 0.25.0. DO NOT EDIT!
+// Options used:
+#[allow(dead_code)]
+pub mod component {
+    #[allow(dead_code)]
+    pub mod diagram_connector {
+        #[allow(dead_code, clippy::all)]
+        pub mod host {
+            #[used]
+            #[doc(hidden)]
+            #[cfg(target_arch = "wasm32")]
+            static __FORCE_SECTION_REF: fn() =
+                super::super::super::__link_custom_section_describing_imports;
+            use super::super::super::_rt;
+            #[allow(unused_unsafe, clippy::all)]
+            pub fn log(message: &str) {
+                unsafe {
+                    let vec0 = message;
+                    let ptr0 = vec0.as_ptr().cast::<u8>();
+                    let len0 = vec0.len();
+
+                    #[cfg(target_arch = "wasm32")]
+                    #[link(wasm_import_module = "component:diagram-connector/host")]
+                    extern "C" {
+                        #[link_name = "log"]
+                        fn wit_import(_: *mut u8, _: usize);
+                    }
+
+                    #[cfg(not(target_arch = "wasm32"))]
+                    fn wit_import(_: *mut u8, _: usize) {
+                        unreachable!()
+                    }
+                    wit_import(ptr0.cast_mut(), len0);
+                }
+            }
+            #[allow(unused_unsafe, clippy::all)]
+            pub fn listen_for_component_text_changes(
+                diagram_connect_name: &str,
+                component_id: &str,
+            ) {
+                unsafe {
+                    let vec0 = diagram_connect_name;
+                    let ptr0 = vec0.as_ptr().cast::<u8>();
+                    let len0 = vec0.len();
+                    let vec1 = component_id;
+                    let ptr1 = vec1.as_ptr().cast::<u8>();
+                    let len1 = vec1.len();
+
+                    #[cfg(target_arch = "wasm32")]
+                    #[link(wasm_import_module = "component:diagram-connector/host")]
+                    extern "C" {
+                        #[link_name = "listen-for-component-text-changes"]
+                        fn wit_import(_: *mut u8, _: usize, _: *mut u8, _: usize);
+                    }
+
+                    #[cfg(not(target_arch = "wasm32"))]
+                    fn wit_import(_: *mut u8, _: usize, _: *mut u8, _: usize) {
+                        unreachable!()
+                    }
+                    wit_import(ptr0.cast_mut(), len0, ptr1.cast_mut(), len1);
+                }
+            }
+            #[allow(unused_unsafe, clippy::all)]
+            pub fn set_component_text(component_id: &str, text: &str) {
+                unsafe {
+                    let vec0 = component_id;
+                    let ptr0 = vec0.as_ptr().cast::<u8>();
+                    let len0 = vec0.len();
+                    let vec1 = text;
+                    let ptr1 = vec1.as_ptr().cast::<u8>();
+                    let len1 = vec1.len();
+
+                    #[cfg(target_arch = "wasm32")]
+                    #[link(wasm_import_module = "component:diagram-connector/host")]
+                    extern "C" {
+                        #[link_name = "set-component-text"]
+                        fn wit_import(_: *mut u8, _: usize, _: *mut u8, _: usize);
+                    }
+
+                    #[cfg(not(target_arch = "wasm32"))]
+                    fn wit_import(_: *mut u8, _: usize, _: *mut u8, _: usize) {
+                        unreachable!()
+                    }
+                    wit_import(ptr0.cast_mut(), len0, ptr1.cast_mut(), len1);
+                }
+            }
+            #[allow(unused_unsafe, clippy::all)]
+            pub fn address_and_way(time_text: &str) -> Result<(_rt::String, Option<u32>), ()> {
+                unsafe {
+                    #[repr(align(4))]
+                    struct RetArea([::core::mem::MaybeUninit<u8>; 20]);
+                    let mut ret_area = RetArea([::core::mem::MaybeUninit::uninit(); 20]);
+                    let vec0 = time_text;
+                    let ptr0 = vec0.as_ptr().cast::<u8>();
+                    let len0 = vec0.len();
+                    let ptr1 = ret_area.0.as_mut_ptr().cast::<u8>();
+                    #[cfg(target_arch = "wasm32")]
+                    #[link(wasm_import_module = "component:diagram-connector/host")]
+                    extern "C" {
+                        #[link_name = "address-and-way"]
+                        fn wit_import(_: *mut u8, _: usize, _: *mut u8);
+                    }
+
+                    #[cfg(not(target_arch = "wasm32"))]
+                    fn wit_import(_: *mut u8, _: usize, _: *mut u8) {
+                        unreachable!()
+                    }
+                    wit_import(ptr0.cast_mut(), len0, ptr1);
+                    let l2 = i32::from(*ptr1.add(0).cast::<u8>());
+                    match l2 {
+                        0 => {
+                            let e = {
+                                let l3 = *ptr1.add(4).cast::<*mut u8>();
+                                let l4 = *ptr1.add(8).cast::<usize>();
+                                let len5 = l4;
+                                let bytes5 = _rt::Vec::from_raw_parts(l3.cast(), len5, len5);
+                                let l6 = i32::from(*ptr1.add(12).cast::<u8>());
+
+                                (
+                                    _rt::string_lift(bytes5),
+                                    match l6 {
+                                        0 => None,
+                                        1 => {
+                                            let e = {
+                                                let l7 = *ptr1.add(16).cast::<i32>();
+
+                                                l7 as u32
+                                            };
+                                            Some(e)
+                                        }
+                                        _ => _rt::invalid_enum_discriminant(),
+                                    },
+                                )
+                            };
+                            Ok(e)
+                        }
+                        1 => {
+                            let e = ();
+                            Err(e)
+                        }
+                        _ => _rt::invalid_enum_discriminant(),
+                    }
+                }
+            }
+        }
+    }
+}
+#[allow(dead_code)]
+pub mod exports {
+    #[allow(dead_code)]
+    pub mod component {
+        #[allow(dead_code)]
+        pub mod diagram_connector {
+            #[allow(dead_code, clippy::all)]
+            pub mod diagram_connector {
+                #[used]
+                #[doc(hidden)]
+                #[cfg(target_arch = "wasm32")]
+                static __FORCE_SECTION_REF: fn() =
+                    super::super::super::super::__link_custom_section_describing_imports;
+                use super::super::super::super::_rt;
+                #[doc(hidden)]
+                #[allow(non_snake_case)]
+                pub unsafe fn _export_init_cabi<T: Guest>() {
+                    #[cfg(target_arch = "wasm32")]
+                    _rt::run_ctors_once();
+                    T::init();
+                }
+                #[doc(hidden)]
+                #[allow(non_snake_case)]
+                pub unsafe fn _export_name_cabi<T: Guest>() -> *mut u8 {
+                    #[cfg(target_arch = "wasm32")]
+                    _rt::run_ctors_once();
+                    let result0 = T::name();
+                    let ptr1 = _RET_AREA.0.as_mut_ptr().cast::<u8>();
+                    let vec2 = (result0.into_bytes()).into_boxed_slice();
+                    let ptr2 = vec2.as_ptr().cast::<u8>();
+                    let len2 = vec2.len();
+                    ::core::mem::forget(vec2);
+                    *ptr1.add(4).cast::<usize>() = len2;
+                    *ptr1.add(0).cast::<*mut u8>() = ptr2.cast_mut();
+                    ptr1
+                }
+                #[doc(hidden)]
+                #[allow(non_snake_case)]
+                pub unsafe fn __post_return_name<T: Guest>(arg0: *mut u8) {
+                    let l0 = *arg0.add(0).cast::<*mut u8>();
+                    let l1 = *arg0.add(4).cast::<usize>();
+                    _rt::cabi_dealloc(l0, l1, 1);
+                }
+                #[doc(hidden)]
+                #[allow(non_snake_case)]
+                pub unsafe fn _export_on_component_text_changed_cabi<T: Guest>(
+                    arg0: *mut u8,
+                    arg1: usize,
+                    arg2: *mut u8,
+                    arg3: usize,
+                ) {
+                    #[cfg(target_arch = "wasm32")]
+                    _rt::run_ctors_once();
+                    let len0 = arg1;
+                    let bytes0 = _rt::Vec::from_raw_parts(arg0.cast(), len0, len0);
+                    let len1 = arg3;
+                    let bytes1 = _rt::Vec::from_raw_parts(arg2.cast(), len1, len1);
+                    T::on_component_text_changed(
+                        _rt::string_lift(bytes0),
+                        _rt::string_lift(bytes1),
+                    );
+                }
+                pub trait Guest {
+                    fn init();
+                    fn name() -> _rt::String;
+                    fn on_component_text_changed(component_id: _rt::String, text: _rt::String);
+                }
+                #[doc(hidden)]
+
+                macro_rules! __export_component_diagram_connector_diagram_connector_cabi{
+    ($ty:ident with_types_in $($path_to_types:tt)*) => (const _: () = {
+
+      #[export_name = "component:diagram-connector/diagram-connector#init"]
+      unsafe extern "C" fn export_init() {
+        $($path_to_types)*::_export_init_cabi::<$ty>()
+      }
+      #[export_name = "component:diagram-connector/diagram-connector#name"]
+      unsafe extern "C" fn export_name() -> *mut u8 {
+        $($path_to_types)*::_export_name_cabi::<$ty>()
+      }
+      #[export_name = "cabi_post_component:diagram-connector/diagram-connector#name"]
+      unsafe extern "C" fn _post_return_name(arg0: *mut u8,) {
+        $($path_to_types)*::__post_return_name::<$ty>(arg0)
+      }
+      #[export_name = "component:diagram-connector/diagram-connector#on-component-text-changed"]
+      unsafe extern "C" fn export_on_component_text_changed(arg0: *mut u8,arg1: usize,arg2: *mut u8,arg3: usize,) {
+        $($path_to_types)*::_export_on_component_text_changed_cabi::<$ty>(arg0, arg1, arg2, arg3)
+      }
+    };);
+  }
+                #[doc(hidden)]
+                pub(crate) use __export_component_diagram_connector_diagram_connector_cabi;
+                #[repr(align(4))]
+                struct _RetArea([::core::mem::MaybeUninit<u8>; 8]);
+                static mut _RET_AREA: _RetArea = _RetArea([::core::mem::MaybeUninit::uninit(); 8]);
+            }
+        }
+    }
+}
+mod _rt {
+    pub use alloc_crate::string::String;
+    pub use alloc_crate::vec::Vec;
+    pub unsafe fn string_lift(bytes: Vec<u8>) -> String {
+        if cfg!(debug_assertions) {
+            String::from_utf8(bytes).unwrap()
+        } else {
+            String::from_utf8_unchecked(bytes)
+        }
+    }
+    pub unsafe fn invalid_enum_discriminant<T>() -> T {
+        if cfg!(debug_assertions) {
+            panic!("invalid enum discriminant")
+        } else {
+            core::hint::unreachable_unchecked()
+        }
+    }
+
+    #[cfg(target_arch = "wasm32")]
+    pub fn run_ctors_once() {
+        wit_bindgen_rt::run_ctors_once();
+    }
+    pub unsafe fn cabi_dealloc(ptr: *mut u8, size: usize, align: usize) {
+        if size == 0 {
+            return;
+        }
+        let layout = alloc::Layout::from_size_align_unchecked(size, align);
+        alloc::dealloc(ptr as *mut u8, layout);
+    }
+    extern crate alloc as alloc_crate;
+    pub use alloc_crate::alloc;
+}
+
+/// Generates `#[no_mangle]` functions to export the specified type as the
+/// root implementation of all generated traits.
+///
+/// For more information see the documentation of `wit_bindgen::generate!`.
+///
+/// ```rust
+/// # macro_rules! export{ ($($t:tt)*) => (); }
+/// # trait Guest {}
+/// struct MyType;
+///
+/// impl Guest for MyType {
+///     // ...
+/// }
+///
+/// export!(MyType);
+/// ```
+#[allow(unused_macros)]
+#[doc(hidden)]
+
+macro_rules! __export_component_impl {
+  ($ty:ident) => (self::export!($ty with_types_in self););
+  ($ty:ident with_types_in $($path_to_types_root:tt)*) => (
+  $($path_to_types_root)*::exports::component::diagram_connector::diagram_connector::__export_component_diagram_connector_diagram_connector_cabi!($ty with_types_in $($path_to_types_root)*::exports::component::diagram_connector::diagram_connector);
+  )
+}
+#[doc(inline)]
+pub(crate) use __export_component_impl as export;
+
+#[cfg(target_arch = "wasm32")]
+#[link_section = "component-type:wit-bindgen:0.25.0:component:encoded world"]
+#[doc(hidden)]
+pub static __WIT_BINDGEN_COMPONENT_TYPE: [u8; 550] = *b"\
+\0asm\x0d\0\x01\0\0\x19\x16wit-component-encoding\x04\0\x07\xa6\x03\x01A\x02\x01\
+A\x04\x01B\x0b\x01@\x01\x07messages\x01\0\x04\0\x03log\x01\0\x01@\x02\x14diagram\
+-connect-names\x0ccomponent-ids\x01\0\x04\0!listen-for-component-text-changes\x01\
+\x01\x01@\x02\x0ccomponent-ids\x04texts\x01\0\x04\0\x12set-component-text\x01\x02\
+\x01ky\x01o\x02s\x03\x01j\x01\x04\0\x01@\x01\x09time-texts\0\x05\x04\0\x0faddres\
+s-and-way\x01\x06\x03\x01\x20component:diagram-connector/host\x05\0\x01B\x06\x01\
+@\0\x01\0\x04\0\x04init\x01\0\x01@\0\0s\x04\0\x04name\x01\x01\x01@\x02\x0ccompon\
+ent-ids\x04texts\x01\0\x04\0\x19on-component-text-changed\x01\x02\x04\x01-compon\
+ent:diagram-connector/diagram-connector\x05\x01\x04\x01%component:diagram-connec\
+tor/component\x04\0\x0b\x0f\x01\0\x09component\x03\0\0\0G\x09producers\x01\x0cpr\
+ocessed-by\x02\x0dwit-component\x070.208.1\x10wit-bindgen-rust\x060.25.0";
+
+#[inline(never)]
+#[doc(hidden)]
+#[cfg(target_arch = "wasm32")]
+pub fn __link_custom_section_describing_imports() {
+    wit_bindgen_rt::maybe_link_cabi_realloc();
+}

test_files/components/rust_diagram_connector/src/lib.rs

@@ -0,0 +1,63 @@
+use std::borrow::Cow;
+use std::cell::RefCell;
+
+#[allow(warnings)]
+mod bindings;
+
+use bindings::component::diagram_connector::host;
+use bindings::exports::component::diagram_connector::diagram_connector;
+
+macro_rules! log {
+    ($($arg:tt)*) => (host::log(&format!($($arg)*)))
+}
+
+static NAME: &str = "Rust Test Diagram Connector";
+
+// Note: Ids from `test_files/cache_diagram.excalidraw`
+const ADDRESS_COMPONENT_ID: &str = "ITxhJ7NtZ74YFd9JQ0_pl";
+const TIME_COMPONENT_ID: &str = "afXu8_6Kqfq-q2IsjtAcP";
+const STATUS_COMPONENT_ID: &str = "0iH5yRbH4IEseV3mnof3A";
+
+thread_local! {
+    static TIME_TEXT: RefCell<String> = <_>::default();
+}
+
+struct Component;
+
+impl diagram_connector::Guest for Component {
+    fn init() {
+        host::listen_for_component_text_changes(NAME, TIME_COMPONENT_ID);
+        log!("'{NAME}' initialized")
+    }
+
+    fn name() -> String {
+        NAME.to_string()
+    }
+
+    fn on_component_text_changed(component_id: String, text: String) {
+        match component_id.as_str() {
+            TIME_COMPONENT_ID => {
+                TIME_TEXT.set(text);
+                refresh_fields();
+            }
+            _ => (),
+        }
+    }
+}
+
+fn refresh_fields() {
+    let way = TIME_TEXT.with_borrow(|time_text| host::address_and_way(&time_text));
+    let Ok((address, way)) = way else {
+        return;
+    };
+    host::set_component_text(ADDRESS_COMPONENT_ID, &address);
+
+    let status_text: Cow<str> = if let Some(way) = way {
+        format!("VALID, WAY: {way}").into()
+    } else {
+        "NOT VALID".into()
+    };
+    host::set_component_text(STATUS_COMPONENT_ID, &status_text);
+}
+
+bindings::export!(Component with_types_in bindings);

test_files/components/rust_diagram_connector/wit/world.wit

@@ -0,0 +1,19 @@
+package component:diagram-connector;
+
+interface host {
+    log: func(message: string);
+    listen-for-component-text-changes: func(diagram-connect-name: string, component-id: string);
+    set-component-text: func(component-id: string, text: string);
+    address-and-way: func(time-text: string) -> result<tuple<string, option<u32>>>;
+}
+
+interface diagram-connector {
+    init: func();
+    name: func() -> string;
+    on-component-text-changed: func(component-id: string, text: string);
+}
+
+world component {
+    import host;
+    export diagram-connector;
+}