[librsvg: 5/11] Implement some common traits for PathOrUrl

[Federico Mena Quintero <federico src gnome org>]

commit 4ef4139e933f7cd89ea67d5f816c2e2c1bc5ff3a
Author: Federico Mena Quintero <federico gnome org>
Date:   Thu Jan 21 13:47:46 2021 -0600

    Implement some common traits for PathOrUrl

 src/c_api/handle.rs | 12 +++++++++++-
 src/c_api/mod.rs    |  2 +-
 2 files changed, 12 insertions(+), 2 deletions(-)
---
diff --git a/src/c_api/handle.rs b/src/c_api/handle.rs
index 674f6030..4fe21747 100644
--- a/src/c_api/handle.rs
+++ b/src/c_api/handle.rs
@@ -2143,7 +2143,8 @@ pub unsafe extern "C" fn rsvg_cleanup() {}
 /// `gio::File::new_for_path()` or `gio::File::new_for_uri()` as appropriate.
 ///
 /// This enum does the magic heuristics to figure this out.
-enum PathOrUrl {
+#[derive(Clone, Debug)]
+pub enum PathOrUrl {
     Path(PathBuf),
     Url(Url),
 }
@@ -2185,6 +2186,15 @@ impl PathOrUrl {
     }
 }
 
+impl fmt::Display for PathOrUrl {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        match *self {
+            PathOrUrl::Path(ref p) => p.display().fmt(f),
+            PathOrUrl::Url(ref u) => u.fmt(f),
+        }
+    }
+}
+
 fn check_cairo_context(cr: &cairo::Context) -> Result<(), RenderingError> {
     let status = cr.status();
     if status == cairo::Status::Success {
diff --git a/src/c_api/mod.rs b/src/c_api/mod.rs
index b7003df8..a143c3d0 100644
--- a/src/c_api/mod.rs
+++ b/src/c_api/mod.rs
@@ -51,6 +51,6 @@ mod messages;
 
 mod color_utils;
 mod dpi;
-mod handle;
+pub mod handle;
 pub mod pixbuf_utils;
 mod sizing;