Simplify the launch builder

examples/dynamic_asset.rs

@@ -10,7 +10,7 @@ use dioxus::prelude::*;
 const STYLE: &str = asset!("./examples/assets/custom_assets.css");
 
 fn main() {
-    launch_desktop(app);
+    LaunchBuilder::desktop().launch(app);
 }
 
 fn app() -> Element {

examples/multiwindow.rs

@@ -7,7 +7,7 @@
 use dioxus::prelude::*;
 
 fn main() {
-    launch_desktop(app);
+    LaunchBuilder::desktop().launch(app);
 }
 
 fn app() -> Element {

examples/popup.rs

@@ -5,7 +5,7 @@ use dioxus::prelude::*;
 use std::rc::Rc;
 
 fn main() {
-    launch_desktop(app);
+    LaunchBuilder::desktop().launch(app);
 }
 
 fn app() -> Element {

examples/shortcut.rs

@@ -9,7 +9,7 @@ use dioxus::desktop::use_global_shortcut;
 use dioxus::prelude::*;
 
 fn main() {
-    launch_desktop(app);
+    LaunchBuilder::desktop().launch(app);
 }
 
 fn app() -> Element {

examples/video_stream.rs

@@ -16,7 +16,7 @@ fn main() {
     // For the sake of this example, we will download the video file if it doesn't exist
     ensure_video_is_loaded();
 
-    launch_desktop(app);
+    LaunchBuilder::desktop().launch(app);
 }
 
 fn app() -> Element {

examples/window_zoom.rs

@@ -5,7 +5,7 @@
 use dioxus::prelude::*;
 
 fn main() {
-    launch_desktop(app);
+    LaunchBuilder::desktop().launch(app);
 }
 
 fn app() -> Element {

packages/core/src/launch.rs

@@ -0,0 +1,8 @@
+//! This module contains utilities renderers use to integrate with the launch function.
+
+/// A marker trait for platform configs. We use this marker to
+/// make sure that the user doesn't accidentally pass in a config
+/// builder instead of the config
+pub trait LaunchConfig: 'static {}
+
+impl LaunchConfig for () {}

packages/core/src/lib.rs

@@ -12,6 +12,7 @@ mod events;
 mod fragment;
 mod generational_box;
 mod global_context;
+pub mod launch;
 mod mutations;
 mod nodes;
 mod properties;

packages/desktop/src/config.rs

@@ -1,3 +1,4 @@
+use dioxus_core::launch::LaunchConfig;
 use std::borrow::Cow;
 use std::path::PathBuf;
 use tao::window::{Icon, WindowBuilder};
@@ -51,6 +52,8 @@ pub struct Config {
     pub(crate) last_window_close_behavior: WindowCloseBehaviour,
 }
 
+impl LaunchConfig for Config {}
+
 pub(crate) type WryProtocol = (
     String,
     Box<dyn Fn(HttpRequest<Vec<u8>>) -> HttpResponse<Cow<'static, [u8]>> + 'static>,

packages/desktop/src/launch.rs

@@ -1,4 +1,4 @@
-pub use crate::Config;
+use crate::Config;
 use crate::{
     app::App,
     ipc::{IpcMethod, UserWindowEvent},
@@ -85,14 +85,19 @@ pub fn launch_virtual_dom(virtual_dom: VirtualDom, desktop_config: Config) -> !
 /// Launches the WebView and runs the event loop, with configuration and root props.
 pub fn launch(
     root: fn() -> Element,
-    contexts: Vec<Box<dyn Fn() -> Box<dyn Any>>>,
-    platform_config: Config,
+    contexts: Vec<Box<dyn Fn() -> Box<dyn Any> + Send + Sync>>,
+    platform_config: Vec<Box<dyn Any>>,
 ) -> ! {
     let mut virtual_dom = VirtualDom::new(root);
 
     for context in contexts {
         virtual_dom.insert_any_root_context(context());
     }
 
+    let platform_config = *platform_config
+        .into_iter()
+        .find_map(|cfg| cfg.downcast::<Config>().ok())
+        .unwrap_or_default();
+
     launch_virtual_dom(virtual_dom, platform_config)
 }