integration of active_app module

src-tauri/Cargo.lock

@@ -1184,6 +1184,7 @@ dependencies = [
  "gif",
  "image",
  "keyring",
+ "lazy_static",
  "objc2 0.6.3",
  "objc2-app-kit",
  "objc2-foundation 0.3.2",

src-tauri/Cargo.toml

@@ -48,6 +48,7 @@ image = {version = "0.25.9", default-features = false, features = ["gif"] }
 gif = "0.14.1"
 raw-window-handle = "0.6"
 enigo = { version = "0.6.1", features = ["wayland"] }
+lazy_static = "1.5.0"
 
 [target.'cfg(not(any(target_os = "android", target_os = "ios")))'.dependencies]
 tauri-plugin-global-shortcut = "2"
@@ -55,11 +56,24 @@ tauri-plugin-positioner = "2"
 
 [target.'cfg(target_os = "macos")'.dependencies]
 objc2 = "0.6.3"
-objc2-app-kit = { version = "0.3.2", features = ["NSWindow", "NSWindowScripting"] }
-objc2-foundation = "0.3.2"
+objc2-app-kit = { version = "0.3.2", features = [
+  "NSWindow",
+  "NSWindowScripting",
+  "NSWorkspace",
+  "NSRunningApplication"
+] }
+objc2-foundation = { version = "0.3.2", features = ["NSNotification", "NSString", "NSURL"] }
 
 [target.'cfg(target_os = "windows")'.dependencies]
 windows = { version = "0.58", features = [
   "Win32_Foundation",
+  "Win32_System_ProcessStatus",
+  "Win32_UI_WindowsAndMessaging",
+  "Win32_System_Threading",
+  "Win32_UI_Shell_PropertiesSystem",
+  "Win32_System_Com",
+  "Win32_UI_Accessibility",
+  "Win32_Storage_FileSystem",
+  "Win32_Globalization",
   "Win32_UI_Input_KeyboardAndMouse",
 ] }

src-tauri/src/app.rs

@@ -7,6 +7,7 @@ use crate::{
     lock_w,
     remotes::health::{HealthError, HealthRemote},
     services::{
+        active_app::init_active_app_changes_listener,
         auth::{get_access_token, get_tokens},
         health_manager::show_health_manager_with_error,
         scene::{close_splash_window, open_scene_window, open_splash_window},
@@ -23,6 +24,10 @@ pub async fn start_fdoll() {
         let mut guard = lock_w!(FDOLL);
         guard.tray = Some(tray);
     }
+
+    // Begin listening for foreground app changes
+    init_active_app_changes_listener();
+
     if let Err(err) = init_startup_sequence().await {
         tracing::error!("startup sequence failed: {err}");
         show_health_manager_with_error(Some(err.to_string()));

src-tauri/src/services/active_app.rs

@@ -0,0 +1,425 @@
+use std::fmt::Debug;
+use ts_rs::TS;
+
+use serde::{Deserialize, Serialize};
+use tauri::Emitter;
+use tracing::error;
+
+use crate::get_app_handle;
+
+#[derive(Debug, Clone, Serialize, Deserialize, TS)]
+#[serde(rename_all = "camelCase")]
+#[ts(export)]
+pub struct AppMetadata {
+    pub localized: Option<String>,
+    pub unlocalized: Option<String>,
+}
+
+pub fn listen_for_active_app_changes<F>(callback: F)
+where
+    F: Fn(AppMetadata) + Send + 'static,
+{
+    listen_impl(callback)
+}
+
+#[cfg(target_os = "macos")]
+fn listen_impl<F>(callback: F)
+where
+    F: Fn(AppMetadata) + Send + 'static,
+{
+    macos::listen_for_active_app_changes(callback);
+}
+
+#[cfg(target_os = "windows")]
+fn listen_impl<F>(callback: F)
+where
+    F: Fn(AppMetadata) + Send + 'static,
+{
+    windows_impl::listen_for_active_app_changes(callback);
+}
+
+#[cfg(not(any(target_os = "macos", target_os = "windows")))]
+fn listen_impl<F>(_callback: F)
+where
+    F: Fn(AppMetadata) + Send + 'static,
+{
+    // no-op on unsupported platforms
+}
+
+#[cfg(target_os = "macos")]
+mod macos {
+    use super::AppMetadata;
+    use lazy_static::lazy_static;
+    use objc2::runtime::{AnyClass, AnyObject, Sel};
+    use objc2::{class, msg_send, sel};
+    use objc2_foundation::NSString;
+    use std::ffi::CStr;
+    use std::sync::{Mutex, Once};
+
+    #[allow(unused_imports)] // for framework linking, not referenced in code
+    use objc2_app_kit::NSWorkspace;
+
+    lazy_static! {
+        static ref CALLBACK: Mutex<Option<Box<dyn Fn(AppMetadata) + Send + 'static>>> =
+            Mutex::new(None);
+    }
+    static INIT_OBSERVER: Once = Once::new();
+
+    pub fn listen_for_active_app_changes<F>(callback: F)
+    where
+        F: Fn(AppMetadata) + Send + 'static,
+    {
+        INIT_OBSERVER.call_once(|| {
+            register_objc_observer_class();
+        });
+        *CALLBACK.lock().unwrap() = Some(Box::new(callback));
+
+        unsafe {
+            let cls = AnyClass::get(CStr::from_bytes_with_nul(b"RustActiveAppObserver\0").unwrap())
+                .unwrap();
+            let observer: *mut AnyObject = msg_send![cls, new];
+
+            let ws: *mut AnyObject = msg_send![class!(NSWorkspace), sharedWorkspace];
+            let nc: *mut AnyObject = msg_send![ws, notificationCenter];
+            let notif_name = NSString::from_str("NSWorkspaceDidActivateApplicationNotification");
+            let _: () = msg_send![
+                nc,
+                addObserver: observer,
+                selector: sel!(appActivated:),
+                name: &*notif_name,
+                object: ws
+            ];
+        }
+    }
+
+    fn register_objc_observer_class() {
+        use objc2::runtime::ClassBuilder;
+
+        let cname = CStr::from_bytes_with_nul(b"RustActiveAppObserver\0").unwrap();
+        let super_cls = class!(NSObject);
+        let mut builder = ClassBuilder::new(&cname, super_cls).unwrap();
+        unsafe {
+            builder.add_method(
+                sel!(appActivated:),
+                app_activated as extern "C" fn(*mut AnyObject, Sel, *mut AnyObject),
+            );
+        }
+        builder.register();
+    }
+
+    extern "C" fn app_activated(_self: *mut AnyObject, _cmd: Sel, _notif: *mut AnyObject) {
+        let info = unsafe { get_active_app_names_macos_internal() };
+        if let Some(cb) = CALLBACK.lock().unwrap().as_ref() {
+            cb(info);
+        }
+    }
+
+    pub unsafe fn get_active_app_names_macos_internal() -> AppMetadata {
+        let ws: *mut AnyObject = msg_send![class!(NSWorkspace), sharedWorkspace];
+        let front_app: *mut AnyObject = msg_send![ws, frontmostApplication];
+        if front_app.is_null() {
+            return AppMetadata {
+                localized: None,
+                unlocalized: None,
+            };
+        }
+
+        let name: *mut NSString = msg_send![front_app, localizedName];
+        let localized = if name.is_null() {
+            None
+        } else {
+            Some(unsafe {
+                CStr::from_ptr((*name).UTF8String())
+                    .to_string_lossy()
+                    .into_owned()
+            })
+        };
+
+        let exe_url: *mut AnyObject = msg_send![front_app, executableURL];
+        let unlocalized = if exe_url.is_null() {
+            None
+        } else {
+            let exe_name: *mut NSString = msg_send![exe_url, lastPathComponent];
+            if exe_name.is_null() {
+                None
+            } else {
+                Some(unsafe {
+                    CStr::from_ptr((*exe_name).UTF8String())
+                        .to_string_lossy()
+                        .into_owned()
+                })
+            }
+        };
+        AppMetadata {
+            localized,
+            unlocalized,
+        }
+    }
+}
+
+#[cfg(target_os = "windows")]
+mod windows_impl {
+    use super::AppMetadata;
+    use std::ffi::OsString;
+    use std::iter;
+    use std::os::windows::ffi::OsStringExt;
+    use std::path::Path;
+    use std::ptr;
+    use windows::core::PCWSTR;
+    use windows::Win32::Foundation::HWND;
+    use windows::Win32::Globalization::GetUserDefaultLangID;
+    use windows::Win32::System::ProcessStatus::GetModuleFileNameExW;
+    use windows::Win32::System::Threading::{OpenProcess, PROCESS_QUERY_LIMITED_INFORMATION};
+    use windows::Win32::UI::Accessibility::{SetWinEventHook, UnhookWinEvent, HWINEVENTHOOK};
+    use windows::Win32::UI::WindowsAndMessaging::{
+        DispatchMessageW, GetForegroundWindow, GetMessageW, GetWindowTextW,
+        GetWindowThreadProcessId, EVENT_SYSTEM_FOREGROUND, MSG, WINEVENT_OUTOFCONTEXT,
+    };
+
+    pub fn listen_for_active_app_changes<F>(callback: F)
+    where
+        F: Fn(AppMetadata) + Send + 'static,
+    {
+        // Run the hook on a background thread so we don’t block the caller.
+        std::thread::spawn(move || unsafe {
+            let hook = SetWinEventHook(
+                EVENT_SYSTEM_FOREGROUND,
+                EVENT_SYSTEM_FOREGROUND,
+                None,
+                Some(win_event_proc::<F>),
+                0,
+                0,
+                WINEVENT_OUTOFCONTEXT,
+            );
+
+            if hook.is_invalid() {
+                eprintln!("Failed to set event hook");
+                return;
+            }
+
+            // store callback in TLS for this thread
+            CALLBACK.with(|cb| cb.replace(Some(Box::new(callback))));
+
+            let mut msg = MSG::default();
+            while GetMessageW(&mut msg, None, 0, 0).as_bool() {
+                DispatchMessageW(&msg);
+            }
+
+            let _ = UnhookWinEvent(hook);
+        });
+    }
+
+    thread_local! {
+        static CALLBACK: std::cell::RefCell<Option<Box<dyn Fn(AppMetadata) + Send + 'static>>> =
+            std::cell::RefCell::new(None);
+    }
+
+    unsafe extern "system" fn win_event_proc<F>(
+        _h_win_event_hook: HWINEVENTHOOK,
+        event: u32,
+        hwnd: HWND,
+        _id_object: i32,
+        _id_child: i32,
+        _id_event_thread: u32,
+        _dw_ms_event_time: u32,
+    ) {
+        if event == EVENT_SYSTEM_FOREGROUND {
+            let names = get_active_app_names_windows(Some(hwnd));
+            CALLBACK.with(|cb| {
+                if let Some(ref cb) = *cb.borrow() {
+                    cb(names);
+                }
+            });
+        }
+    }
+
+    pub fn get_active_app_names_windows(hwnd_override: Option<HWND>) -> AppMetadata {
+        unsafe {
+            let hwnd = hwnd_override.unwrap_or_else(|| GetForegroundWindow());
+            if hwnd.0 == std::ptr::null_mut() {
+                return AppMetadata {
+                    localized: None,
+                    unlocalized: None,
+                };
+            }
+            let mut pid: u32 = 0;
+            GetWindowThreadProcessId(hwnd, Some(&mut pid));
+            if pid == 0 {
+                return AppMetadata {
+                    localized: None,
+                    unlocalized: None,
+                };
+            }
+            let process_handle = match OpenProcess(PROCESS_QUERY_LIMITED_INFORMATION, false, pid) {
+                Ok(h) if !h.is_invalid() => h,
+                _ => {
+                    return AppMetadata {
+                        localized: None,
+                        unlocalized: None,
+                    };
+                }
+            };
+            let mut buffer: [u16; 1024] = [0; 1024];
+            let size = GetModuleFileNameExW(process_handle, None, &mut buffer);
+            let exe_path = if size > 0 {
+                OsString::from_wide(&buffer[..size as usize])
+            } else {
+                return AppMetadata {
+                    localized: None,
+                    unlocalized: None,
+                };
+            };
+            let exe_path_str = exe_path.to_string_lossy();
+            let exe_name = Path::new(&*exe_path_str)
+                .file_name()
+                .and_then(|s| s.to_str())
+                .unwrap_or("");
+            let is_uwp = exe_name.eq_ignore_ascii_case("ApplicationFrameHost.exe");
+            let (localized, unlocalized) = if is_uwp {
+                (
+                    get_window_title(hwnd),
+                    Some("ApplicationFrameHost".to_string()),
+                )
+            } else {
+                let unlocalized = Path::new(&*exe_path_str)
+                    .file_stem()
+                    .and_then(|s| s.to_str())
+                    .map(|s| s.to_string());
+                let localized = get_file_description(&exe_path_str).or_else(|| unlocalized.clone());
+                (localized, unlocalized)
+            };
+            AppMetadata {
+                localized,
+                unlocalized,
+            }
+        }
+    }
+
+    fn get_window_title(hwnd: HWND) -> Option<String> {
+        unsafe {
+            let mut buffer: [u16; 512] = [0; 512];
+            let len = GetWindowTextW(hwnd, &mut buffer);
+            if len == 0 {
+                None
+            } else {
+                Some(
+                    OsString::from_wide(&buffer[..len as usize])
+                        .to_string_lossy()
+                        .into_owned(),
+                )
+            }
+        }
+    }
+
+    fn get_file_description(exe_path: &str) -> Option<String> {
+        unsafe {
+            let wide_path: Vec<u16> = exe_path.encode_utf16().chain(iter::once(0)).collect();
+            let size = windows::Win32::Storage::FileSystem::GetFileVersionInfoSizeW(
+                PCWSTR(wide_path.as_ptr()),
+                None,
+            );
+            if size == 0 {
+                return None;
+            }
+            let mut buffer: Vec<u8> = vec![0; size as usize];
+            let result = windows::Win32::Storage::FileSystem::GetFileVersionInfoW(
+                PCWSTR(wide_path.as_ptr()),
+                0,
+                size,
+                buffer.as_mut_ptr() as *mut _,
+            );
+            if result.is_err() {
+                return None;
+            }
+            let mut translations_ptr: *mut u8 = ptr::null_mut();
+            let mut translations_len: u32 = 0;
+            let translation_query: Vec<u16> = "\\VarFileInfo\\Translation"
+                .encode_utf16()
+                .chain(iter::once(0))
+                .collect();
+            let trans_result = windows::Win32::Storage::FileSystem::VerQueryValueW(
+                buffer.as_ptr() as *const _,
+                PCWSTR(translation_query.as_ptr()),
+                &mut translations_ptr as *mut _ as *mut *mut _,
+                &mut translations_len,
+            );
+            let system_lang_id = GetUserDefaultLangID();
+            if trans_result.as_bool() && translations_len >= 4 {
+                let translations = std::slice::from_raw_parts(
+                    translations_ptr as *const u16,
+                    (translations_len / 2) as usize,
+                );
+                let mut lang_attempts = Vec::new();
+                for i in (0..translations.len()).step_by(2) {
+                    if i + 1 < translations.len() {
+                        let lang = translations[i];
+                        let codepage = translations[i + 1];
+                        if lang == system_lang_id {
+                            lang_attempts.insert(0, (lang, codepage));
+                        } else {
+                            lang_attempts.push((lang, codepage));
+                        }
+                    }
+                }
+                for (lang, codepage) in lang_attempts {
+                    let query = format!(
+                        "\\StringFileInfo\\{:04x}{:04x}\\FileDescription",
+                        lang, codepage
+                    );
+                    let wide_query: Vec<u16> = query.encode_utf16().chain(iter::once(0)).collect();
+                    let mut value_ptr: *mut u8 = ptr::null_mut();
+                    let mut value_len: u32 = 0;
+                    let query_result = windows::Win32::Storage::FileSystem::VerQueryValueW(
+                        buffer.as_ptr() as *const _,
+                        PCWSTR(wide_query.as_ptr()),
+                        &mut value_ptr as *mut _ as *mut *mut _,
+                        &mut value_len,
+                    );
+                    if query_result.as_bool() && !value_ptr.is_null() && value_len > 0 {
+                        let wide_str = std::slice::from_raw_parts(
+                            value_ptr as *const u16,
+                            (value_len as usize).saturating_sub(1),
+                        );
+                        let description =
+                            OsString::from_wide(wide_str).to_string_lossy().into_owned();
+                        if !description.is_empty() {
+                            return Some(description);
+                        }
+                    }
+                }
+            }
+            let fallback_query: Vec<u16> = "\\StringFileInfo\\040904b0\\FileDescription"
+                .encode_utf16()
+                .chain(iter::once(0))
+                .collect();
+            let mut value_ptr: *mut u8 = ptr::null_mut();
+            let mut value_len: u32 = 0;
+            let query_result = windows::Win32::Storage::FileSystem::VerQueryValueW(
+                buffer.as_ptr() as *const _,
+                PCWSTR(fallback_query.as_ptr()),
+                &mut value_ptr as *mut _ as *mut *mut _,
+                &mut value_len,
+            );
+            if query_result.as_bool() && !value_ptr.is_null() && value_len > 0 {
+                let wide_str = std::slice::from_raw_parts(
+                    value_ptr as *const u16,
+                    (value_len as usize).saturating_sub(1),
+                );
+                Some(OsString::from_wide(wide_str).to_string_lossy().into_owned())
+            } else {
+                None
+            }
+        }
+    }
+}
+
+pub static ACTIVE_APP_CHANGED: &str = "active-app-changed";
+
+pub fn init_active_app_changes_listener() {
+    let app_handle = get_app_handle();
+    listen_for_active_app_changes(|app_names: AppMetadata| {
+        if let Err(e) = app_handle.emit(ACTIVE_APP_CHANGED, app_names) {
+            error!("Failed to emit active app changed event: {}", e);
+        }
+    });
+}

src-tauri/src/services/mod.rs

@@ -1,3 +1,4 @@
+pub mod active_app;
 pub mod app_menu;
 pub mod auth;
 pub mod client_config_manager;

src/routes/scene/+page.svelte

@@ -10,11 +10,14 @@
   import { invoke } from "@tauri-apps/api/core";
 
   import DesktopPet from "./components/DesktopPet.svelte";
+  import { listen } from "@tauri-apps/api/event";
+  import { onMount } from "svelte";
+  import type { AppMetadata } from "../../types/bindings/AppMetadata";
 
-  let innerWidth = 0;
-  let innerHeight = 0;
+  let innerWidth = $state(0);
+  let innerHeight = $state(0);
 
-  $: isInteractive = $sceneInteractive;
+  let isInteractive = $derived($sceneInteractive);
 
   function getFriendById(userId: string) {
     const friend = $appData?.friends?.find((f) => f.friend.id === userId);
@@ -29,6 +32,18 @@
     const friend = $appData?.friends?.find((f) => f.friend.id === userId);
     return friend?.friend.activeDoll;
   }
+
+  let appMetadata: AppMetadata | null = $state(null);
+
+  onMount(() => {
+    const unlisten = listen<AppMetadata>("active-app-changed", (event) => {
+      appMetadata = event.payload;
+    });
+
+    return () => {
+      unlisten.then((u) => u());
+    };
+  });
 </script>
 
 <svelte:window bind:innerWidth bind:innerHeight />
@@ -63,11 +78,14 @@
         )})
       </span>
 
+      <span class="font-mono text-xs badge py-3">
+        {appMetadata?.localized}
+      </span>
+
       {#if Object.keys($friendsCursorPositions).length > 0}
         <div class="flex flex-col gap-2">
           <div>
             {#each Object.entries($friendsCursorPositions) as [userId, position]}
-              {@const dollConfig = getFriendDoll(userId)}
               <div class="badge py-3 text-xs text-left flex flex-row gap-2">
                 <span class="font-bold">{getFriendById(userId).name}</span>
                 <div class="flex flex-col font-mono">

src/types/bindings/AppMetadata.ts

@@ -0,0 +1,3 @@
+// This file was generated by [ts-rs](https://github.com/Aleph-Alpha/ts-rs). Do not edit this file manually.
+
+export type AppMetadata = { localized: string | null, unlocalized: string | null, };