Merge branch 'master' into binary-protocal

packages/desktop/src/protocol.rs

@@ -1,18 +1,58 @@
+use dioxus_core::ScopeState;
+use dioxus_interpreter_js::{COMMON_JS, INTERPRETER_JS};
+use slab::Slab;
 use std::{
     borrow::Cow,
+    future::Future,
+    ops::Deref,
     path::{Path, PathBuf},
+    pin::Pin,
+    rc::Rc,
+    sync::Arc,
+};
+use tokio::{
+    runtime::Handle,
+    sync::{OnceCell, RwLock},
 };
 use wry::{
     http::{status::StatusCode, Request, Response},
     webview::RequestAsyncResponder,
     Result,
 };
+use crate::{use_window, DesktopContext};
 
 use crate::desktop_context::EditQueue;
 
 static MINIFIED: &str = include_str!("./minified.js");
 
 fn module_loader(root_name: &str, headless: bool) -> String {
+    let js = INTERPRETER_JS.replace(
+        "/*POST_HANDLE_EDITS*/",
+        r#"// Prevent file inputs from opening the file dialog on click
+    let inputs = document.querySelectorAll("input");
+    for (let input of inputs) {
+      if (!input.getAttribute("data-dioxus-file-listener")) {
+        // prevent file inputs from opening the file dialog on click
+        const type = input.getAttribute("type");
+        if (type === "file") {
+          input.setAttribute("data-dioxus-file-listener", true);
+          input.addEventListener("click", (event) => {
+            let target = event.target;
+            let target_id = find_real_id(target);
+            if (target_id !== null) {
+              const send = (event_name) => {
+                const message = serializeIpcMessage("file_diolog", { accept: target.getAttribute("accept"), directory: target.getAttribute("webkitdirectory") === "true", multiple: target.hasAttribute("multiple"), target: parseInt(target_id), bubbles: event_bubbles(event_name), event: event_name });
+                window.ipc.postMessage(message);
+              };
+              send("change&input");
+            }
+            event.preventDefault();
+          });
+        }
+      }
+    }"#,
+    );
+  
     format!(
         r#"
 <script type="module">
@@ -32,15 +72,158 @@ fn module_loader(root_name: &str, headless: bool) -> String {
     )
 }
 
-pub(super) fn desktop_handler(
-    request: &Request<Vec<u8>>,
-    responder: RequestAsyncResponder,
+/// An arbitrary asset is an HTTP response containing a binary body.
+pub type AssetResponse = Response<Cow<'static, [u8]>>;
+
+/// A future that returns an [`AssetResponse`]. This future may be spawned in a new thread,
+/// so it must be [`Send`], [`Sync`], and `'static`.
+pub trait AssetFuture: Future<Output = Option<AssetResponse>> + Send + Sync + 'static {}
+impl<T: Future<Output = Option<AssetResponse>> + Send + Sync + 'static> AssetFuture for T {}
+
+#[derive(Debug, Clone)]
+/// A request for an asset. This is a wrapper around [`Request<Vec<u8>>`] that provides methods specific to asset requests.
+pub struct AssetRequest {
+    path: PathBuf,
+    request: Arc<Request<Vec<u8>>>,
+}
+
+impl AssetRequest {
+    /// Get the path the asset request is for
+    pub fn path(&self) -> &Path {
+        &self.path
+    }
+}
+
+impl From<Request<Vec<u8>>> for AssetRequest {
+    fn from(request: Request<Vec<u8>>) -> Self {
+        let decoded = urlencoding::decode(request.uri().path().trim_start_matches('/'))
+            .expect("expected URL to be UTF-8 encoded");
+        let path = PathBuf::from(&*decoded);
+        Self {
+            request: Arc::new(request),
+            path,
+        }
+    }
+}
+
+impl Deref for AssetRequest {
+    type Target = Request<Vec<u8>>;
+
+    fn deref(&self) -> &Self::Target {
+        &self.request
+    }
+}
+
+/// A handler that takes an [`AssetRequest`] and returns a future that either loads the asset, or returns `None`.
+/// This handler is stashed indefinitely in a context object, so it must be `'static`.
+pub trait AssetHandler<F: AssetFuture>: Send + Sync + 'static {
+    /// Handle an asset request, returning a future that either loads the asset, or returns `None`
+    fn handle_request(&self, request: &AssetRequest) -> F;
+}
+
+impl<F: AssetFuture, T: Fn(&AssetRequest) -> F + Send + Sync + 'static> AssetHandler<F> for T {
+    fn handle_request(&self, request: &AssetRequest) -> F {
+        self(request)
+    }
+}
+
+type AssetHandlerRegistryInner =
+    Slab<Box<dyn Fn(&AssetRequest) -> Pin<Box<dyn AssetFuture>> + Send + Sync + 'static>>;
+
+#[derive(Clone)]
+pub struct AssetHandlerRegistry(Arc<RwLock<AssetHandlerRegistryInner>>);
+
+impl AssetHandlerRegistry {
+    pub fn new() -> Self {
+        AssetHandlerRegistry(Arc::new(RwLock::new(Slab::new())))
+    }
+
+    pub async fn register_handler<F: AssetFuture>(&self, f: impl AssetHandler<F>) -> usize {
+        let mut registry = self.0.write().await;
+        registry.insert(Box::new(move |req| Box::pin(f.handle_request(req))))
+    }
+
+    pub async fn remove_handler(&self, id: usize) -> Option<()> {
+        let mut registry = self.0.write().await;
+        registry.try_remove(id).map(|_| ())
+    }
+
+    pub async fn try_handlers(&self, req: &AssetRequest) -> Option<AssetResponse> {
+        let registry = self.0.read().await;
+        for (_, handler) in registry.iter() {
+            if let Some(response) = handler(req).await {
+                return Some(response);
+            }
+        }
+        None
+    }
+}
+
+/// A handle to a registered asset handler.
+pub struct AssetHandlerHandle {
+    desktop: DesktopContext,
+    handler_id: Rc<OnceCell<usize>>,
+}
+
+impl AssetHandlerHandle {
+    /// Returns the ID for this handle.
+    ///
+    /// Because registering an ID is asynchronous, this may return `None` if the
+    /// registration has not completed yet.
+    pub fn handler_id(&self) -> Option<usize> {
+        self.handler_id.get().copied()
+    }
+}
+
+impl Drop for AssetHandlerHandle {
+    fn drop(&mut self) {
+        let cell = Rc::clone(&self.handler_id);
+        let desktop = Rc::clone(&self.desktop);
+        tokio::task::block_in_place(move || {
+            Handle::current().block_on(async move {
+                if let Some(id) = cell.get() {
+                    desktop.asset_handlers.remove_handler(*id).await;
+                }
+            })
+        });
+    }
+}
+
+/// Provide a callback to handle asset loading yourself.
+///
+/// The callback takes a path as requested by the web view, and it should return `Some(response)`
+/// if you want to load the asset, and `None` if you want to fallback on the default behavior.
+pub fn use_asset_handler<F: AssetFuture>(
+    cx: &ScopeState,
+    handler: impl AssetHandler<F>,
+) -> &AssetHandlerHandle {
+    let desktop = Rc::clone(use_window(cx));
+    cx.use_hook(|| {
+        let handler_id = Rc::new(OnceCell::new());
+        let handler_id_ref = Rc::clone(&handler_id);
+        let desktop_ref = Rc::clone(&desktop);
+        cx.push_future(async move {
+            let id = desktop.asset_handlers.register_handler(handler).await;
+            handler_id.set(id).unwrap();
+        });
+        AssetHandlerHandle {
+            desktop: desktop_ref,
+            handler_id: handler_id_ref,
+        }
+    })
+}
+
+pub(super) async fn desktop_handler(
+    request: Request<Vec<u8>>,
     custom_head: Option<String>,
     custom_index: Option<String>,
     root_name: &str,
+    asset_handlers: &AssetHandlerRegistry,
     edit_queue: &EditQueue,
     headless: bool,
-) {
+) -> Result<AssetResponse> {
+    let request = AssetRequest::from(request);
+
     // If the request is for the root, we'll serve the index.html file.
     if request.uri().path() == "/" {
         // If a custom index is provided, just defer to that, expecting the user to know what they're doing.
@@ -86,18 +269,21 @@ pub(super) fn desktop_handler(
         return;
     }
 
+    // If the user provided a custom asset handler, then call it and return the response
+    // if the request was handled.
+    if let Some(response) = asset_handlers.try_handlers(&request).await {
+        return Ok(response);
+    }
+
     // Else, try to serve a file from the filesystem.
-    let decoded = urlencoding::decode(request.uri().path().trim_start_matches('/'))
-        .expect("expected URL to be UTF-8 encoded");
-    let path = PathBuf::from(&*decoded);
 
     // If the path is relative, we'll try to serve it from the assets directory.
     let mut asset = get_asset_root()
         .unwrap_or_else(|| Path::new(".").to_path_buf())
-        .join(&path);
+        .join(&request.path);
 
     if !asset.exists() {
-        asset = PathBuf::from("/").join(path);
+        asset = PathBuf::from("/").join(request.path);
     }
 
     if asset.exists() {