Added binding for SDL_OpenURL

Author: eigenraven

changelog.md

@@ -6,6 +6,8 @@ when upgrading from a version of rust-sdl2 to another.
 * **BREAKING CHANGE** Update `sdl2-sys/sdl_bindings.rs` to use enums instead of consts. If you were using `sdl2-sys`'s
 enum variants directly in your project, you may be affected. If you only used sdl2 calls, there should not be any problems.
 
+[PR #1138](https://github.com/Rust-SDL2/rust-sdl2/pull/1138) Added binding for `SDL_OpenURL`
+
 ### v0.34.5
 
 [PR #1100](https://github.com/Rust-SDL2/rust-sdl2/pull/1100) Added binding for `SDL_GetDisplayUsableBounds`

src/sdl2/lib.rs

@@ -86,6 +86,7 @@ mod sdl;
 pub mod surface;
 pub mod timer;
 pub mod touch;
+pub mod url;
 pub mod version;
 pub mod video;
 

src/sdl2/url.rs

@@ -0,0 +1,73 @@
+//! Opening URLs in default system handlers
+
+use std::error;
+use std::ffi::{CString, NulError};
+use std::fmt;
+
+use crate::get_error;
+
+use crate::sys;
+
+#[derive(Debug, Clone)]
+pub enum OpenUrlError {
+    InvalidUrl(NulError),
+    SdlError(String),
+}
+
+impl fmt::Display for OpenUrlError {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        use self::OpenUrlError::*;
+
+        match *self {
+            InvalidUrl(ref e) => write!(f, "Invalid URL: {}", e),
+            SdlError(ref e) => write!(f, "SDL error: {}", e),
+        }
+    }
+}
+
+impl error::Error for OpenUrlError {
+    fn description(&self) -> &str {
+        use self::OpenUrlError::*;
+
+        match *self {
+            InvalidUrl(_) => "invalid URL",
+            SdlError(ref e) => e,
+        }
+    }
+}
+
+/// Opens a URL/URI in the default system-provided application.
+///
+/// This will most likely open a web browser for http:// and https:// links,
+/// the default handler application for file:// links, but this varies
+/// between platforms and is not supported on all of them.
+/// It might also cause your window to lose focus, or pause your process on mobile.
+///
+/// There is no way to tell if the system successfully opened the provided URL,
+/// an `Ok` result only means that something was launched to try to handle it.
+///
+/// # Examples
+///
+/// ```no_run
+/// use sdl2::url::open_url;
+///
+/// open_url("https://github.com/Rust-SDL2/rust-sdl2")
+///   .expect("Opening URLs not supported on this platform");
+/// ```
+#[doc(alias = "SDL_OpenURL")]
+pub fn open_url(url: &str) -> Result<(), OpenUrlError> {
+    use self::OpenUrlError::*;
+    let result = unsafe {
+        let url = match CString::new(url) {
+            Ok(s) => s,
+            Err(err) => return Err(InvalidUrl(err)),
+        };
+        sys::SDL_OpenURL(url.as_ptr())
+    } == 0;
+
+    if result {
+        Ok(())
+    } else {
+        Err(SdlError(get_error()))
+    }
+}