Featuer/add support for wasm

Cargo.toml

@@ -9,7 +9,13 @@ repository = "https://github.com/amodm/webbrowser-rs"
 readme = "README.md"
 keywords = ["webbrowser", "browser"]
 license = "MIT OR Apache-2.0"
-edition = "2015"
+edition = "2018"
+
+[target.'cfg(target_arch = "wasm32")'.dependencies.web-sys]
+version = "0.3.36"
+features = [
+  'Window'
+]
 
 [target.'cfg(windows)'.dependencies]
 winapi = { version = "0.3.6", features = ["combaseapi", "objbase", "shellapi", "winerror"] }

src/lib.rs

@@ -51,6 +51,9 @@ use std::process::Command;
 #[cfg(windows)]
 use widestring::U16CString;
 
+#[cfg(target_arch = "wasm32")]
+use web_sys::{Window};
+
 #[derive(Debug, Eq, PartialEq, Copy, Clone, Hash)]
 /// Browser types available
 pub enum Browser {
@@ -149,10 +152,23 @@ impl FromStr for Browser {
 ///     // ...
 /// }
 /// ```
+#[cfg(not(target_arch = "wasm32"))]
 pub fn open(url: &str) -> Result<Output> {
     open_browser(Browser::Default, url)
 }
 
+#[cfg(target_arch = "wasm32")]
+pub fn open(url: &str) -> Result<()> {
+    let window = web_sys::window();
+    match window {
+      Some(w) => {
+        w.open_with_url(url);
+        Ok(())
+      },
+      None => Err(std::io::Error::new(ErrorKind::Other, "should have a window in this context"))
+    }
+}
+
 /// Opens the specified URL on the specific browser (if available) requested. Return semantics are
 /// the same as for [open](fn.open.html).
 ///
@@ -164,6 +180,7 @@ pub fn open(url: &str) -> Result<Output> {
 ///     // ...
 /// }
 /// ```
+#[cfg(not(target_arch = "wasm32"))]
 pub fn open_browser(browser: Browser, url: &str) -> Result<Output> {
     open_browser_internal(browser, url).and_then(|status| {
         if let Some(code) = status.code() {
@@ -357,9 +374,10 @@ fn open_on_unix_using_browser_env(url: &str) -> Result<ExitStatus> {
     target_os = "freebsd",
     target_os = "netbsd",
     target_os = "openbsd",
-    target_os = "haiku"
+    target_os = "haiku",
+    target_arch = "wasm32"
 )))]
-compile_error!("Only Windows, Mac OS, Linux, *BSD and Haiku are currently supported");
+compile_error!("Only Windows, Mac OS, Linux, *BSD and Haiku and Wasm32 are currently supported");
 
 #[test]
 fn test_open_default() {
@@ -386,6 +404,13 @@ fn test_open_internet_explorer() {
     assert!(open_browser(Browser::InternetExplorer, "http://github.com").is_ok());
 }
 
+
+#[test]
+#[cfg(target_arch = "wasm32")]
+fn test_open_default_wasm() {
+    assert!(open("http://github.com").is_ok());
+}
+
 #[test]
 #[ignore]
 fn test_open_safari() {