Added dynatos-title to manage the document title.

Cargo.lock

@@ -108,6 +108,21 @@ dependencies = [
  "web-sys",
 ]
 
+[[package]]
+name = "dynatos-title"
+version = "0.1.0"
+dependencies = [
+ "anyhow",
+ "duplicate",
+ "dynatos-reactive",
+ "dynatos-util",
+ "extend",
+ "js-sys",
+ "tracing",
+ "wasm-bindgen",
+ "web-sys",
+]
+
 [[package]]
 name = "dynatos-util"
 version = "0.1.0"

Cargo.toml

@@ -7,6 +7,7 @@ members = [
 	"dynatos-logger",
 	"dynatos-reactive",
 	"dynatos-router",
+	"dynatos-title",
 	"dynatos-util",
 ]
 resolver = "2"
@@ -20,6 +21,7 @@ dynatos-html = { path = "dynatos-html" }
 dynatos-logger = { path = "dynatos-logger" }
 dynatos-reactive = { path = "dynatos-reactive" }
 dynatos-router = { path = "dynatos-router" }
+dynatos-title = { path = "dynatos-title" }
 dynatos-util = { path = "dynatos-util" }
 
 anyhow = "1.0.79"

dynatos-title/Cargo.toml

@@ -0,0 +1,17 @@
+[package]
+name = "dynatos-title"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
+
+dynatos-reactive = { workspace = true }
+dynatos-util = { workspace = true }
+
+anyhow = { workspace = true }
+duplicate = { workspace = true }
+extend = { workspace = true }
+js-sys = { workspace = true }
+tracing = { workspace = true }
+wasm-bindgen = { workspace = true }
+web-sys = { workspace = true }

dynatos-title/src/lib.rs

@@ -0,0 +1,123 @@
+//! Title management for [`dynatos`]
+
+// TODO: It seems that titles aren't getting dropped for some reason.
+
+// Features
+#![feature(lint_reasons)]
+
+// Imports
+use {dynatos_util::ObjectSetProp, std::cell::RefCell, wasm_bindgen::prelude::wasm_bindgen};
+
+thread_local! {
+	/// Title stack.
+	static TITLE_STACK: RefCell<Vec<Option<String>>> = RefCell::new(vec![]);
+}
+
+/// Title.
+///
+/// Sets the title for as long as this lives.
+#[derive(Debug)]
+pub struct Title {
+	/// Title index
+	title_idx: usize,
+}
+
+impl Title {
+	/// Creates a title.
+	pub fn new<S>(title: S) -> Self
+	where
+		S: Into<String>,
+	{
+		let title = title.into();
+
+		// Set and add the title to the stack
+		self::set_title(&title);
+		let title_idx = TITLE_STACK.with_borrow_mut(|stack| {
+			// If no title exists, add the current one
+			if stack.is_empty() {
+				stack.push(Some(self::cur_title()));
+			}
+
+			// Then add ours
+			let title_idx = stack.len();
+			stack.push(Some(title));
+
+			title_idx
+		});
+
+		Self { title_idx }
+	}
+}
+
+impl Drop for Title {
+	fn drop(&mut self) {
+		// Get the value
+		TITLE_STACK.with_borrow_mut(|stack| {
+			// Remove our title
+			let _prev_title = stack
+				.get_mut(self.title_idx)
+				.and_then(Option::take)
+				.expect("Title was already taken");
+
+			// Then find the next title to set back to.
+			let next_title = loop {
+				let last = stack.last().expect("Should contain at least 1 title");
+				match last {
+					Some(title) => break title,
+					None => {
+						stack.pop().expect("Just checked the value existed");
+					},
+				}
+			};
+			self::set_title(next_title);
+		});
+	}
+}
+
+/// Extension trait to attach a title to an object.
+#[extend::ext(name = ObjectAttachTitle)]
+pub impl js_sys::Object {
+	/// Attaches a title to this object
+	fn attach_title(&self, title: &str) {
+		let prop_name: &str = "__dynatos_title";
+		let title = Title::new(title);
+		self.set_prop(prop_name, WasmTitle(title));
+	}
+}
+
+/// Extension trait to attach a title to an object.
+#[extend::ext(name = ObjectWithTitle)]
+pub impl<T> T
+where
+	T: AsRef<js_sys::Object>,
+{
+	/// Attaches a title to this object.
+	///
+	/// Returns the object, for chaining
+	fn with_title(self, title: &str) -> Self {
+		self.as_ref().attach_title(title);
+		self
+	}
+}
+
+/// Returns the current title
+fn cur_title() -> String {
+	web_sys::window()
+		.expect("Unable to get window")
+		.document()
+		.expect("Unable to get document")
+		.title()
+}
+
+/// Sets the title
+fn set_title(title: &str) {
+	web_sys::window()
+		.expect("Unable to get window")
+		.document()
+		.expect("Unable to get document")
+		.set_title(title);
+}
+
+/// A wasm `Title` type.
+#[wasm_bindgen]
+struct WasmTitle(Title);

examples/Cargo.toml

@@ -12,6 +12,7 @@ dynatos-html = { path = "../dynatos-html" }
 dynatos-logger = { path = "../dynatos-logger" }
 dynatos-reactive = { path = "../dynatos-reactive" }
 dynatos-router = { path = "../dynatos-router" }
+dynatos-title = { path = "../dynatos-title" }
 dynatos-util = { path = "../dynatos-util" }
 
 anyhow = "1.0.79"