GWin32AppInfo: Check for local file path first

When launching a registered handler we compose the command-line
string using the registered command-line template. Applications
expect files in their command-line as local paths rather than
complete URI strings.

For example,

  "Program.exe" "%1"

Should expand to

  "Program.exe" "C:\file.dat"

Rather than

  "Program.exe" "file:///C:\file.dat"

Fixes https://gitlab.gnome.org/GNOME/glib/-/issues/2843

1 files changed, 19 insertions, 4 deletions

diff --git a/gio/gwin32appinfo.c b/gio/gwin32appinfo.c
index 6ff259f7d..0e582a84a 100644
--- a/gio/gwin32appinfo.c
+++ b/gio/gwin32appinfo.c
@@ -4334,10 +4334,25 @@ expand_macro_single (char macro, file_or_uri *obj)
     case '8':
     case '9':
       /* TODO: handle 'l' and 'd' differently (longname and desktop name) */
-      if (obj->uri)
-        result = g_strdup (obj->uri);
-      else if (obj->file)
-        result = g_strdup (obj->file);
+      if (obj->file)
+        {
+          result = g_strdup (obj->file);
+        }
+      else if (obj->uri)
+        {
+          const char *prefix = "file:///";
+          const size_t prefix_len = strlen (prefix);
+
+          if (g_str_has_prefix (obj->uri, prefix) == 0 && obj->uri[prefix_len] != 0)
+            {
+              GFile *file = g_file_new_for_uri (obj->uri);
+              result = g_file_get_path (file);
+              g_object_unref (file);
+            }
+
+          if (!result)
+            result = g_strdup (obj->uri);
+        }
       break;
     case 'u':
     case 'U':