servo: Add make_url with some custom logic

Source-Repo: https://github.com/servo/servo
Source-Revision: 1d7e37e299a74d3192bdecf5aa7fbc5a174db75b

servo/src/servo/servo.rc

@@ -101,6 +101,7 @@ mod util {
     mod color;
     mod unsafe;
     mod time;
+    mod url;
 }
 
 #[warn(no_non_implicitly_copyable_typarams)]

servo/src/servo/util/url.rs

@@ -0,0 +1,39 @@
+export make_url;
+
+import std::net::url;
+import url::{get_scheme, url};
+
+/**
+Create a URL object from a string. Does various helpful browsery things like
+
+* If there's no current url and the path looks like a file then it will
+  create a file url based of the current working directory
+* If there's a current url and the new path is relative then the new url
+  is based off the current url
+
+*/
+fn make_url(str_url: ~str, current_url: option<url>) -> url {
+    let str_url = if get_scheme(str_url).is_some() {
+        str_url
+    } else {
+        if current_url.is_none() {
+            // If all we have is a filename, assume it's a local relative file
+            // and build an absolute path with the cwd
+            ~"file://" + path::connect(os::getcwd(), str_url)
+        } else {
+            fail;//current_url.get().scheme + "://" + str_url
+        }
+    };
+
+    // FIXME: Need to handle errors
+    url::from_str(str_url).get()
+}
+
+#[test]
+fn should_create_absolute_file_url_if_current_url_is_none_and_str_url_looks_filey() {
+    let file = ~"local.html";
+    let url = make_url(file, none);
+    #debug("url: %?", url);
+    assert url.scheme == ~"file";
+    assert url.path.contains(os::getcwd());
+}