don't list duplicate fonts

src/delphi.rs

@@ -745,6 +745,20 @@ impl std::ops::Add<&UStr> for UStr {
     }
 }
 
+impl std::hash::Hash for UStr {
+    fn hash<H: std::hash::Hasher>(&self, state: &mut H) {
+        self.as_slice().hash(state);
+    }
+}
+
+impl PartialEq for UStr {
+    fn eq(&self, other: &Self) -> bool {
+        self.as_slice() == other.as_slice()
+    }
+}
+
+impl Eq for UStr {}
+
 impl Drop for UStr {
     fn drop(&mut self) {
         unsafe { UStrClr(self) }

src/lib.rs

@@ -619,7 +619,8 @@ unsafe extern "C" fn move_extensions_from_localappdata_to_exedir() {
                 if filenames.is_empty() {
                     return
                 }
-                let message = format!("These extension files need to be moved to the install folder:\n\n{filenames}\n\nProceed?");
+                let message =
+                    format!("These extension files need to be moved to the install folder:\n\n{filenames}\n\nProceed?");
                 let answer = show_question(&UStr::new(message));
                 if answer != 6 {
                     return

src/load.rs

@@ -1344,20 +1344,21 @@ pub unsafe fn load_gmk(mut path: PathBuf) -> Result<()> {
     {
         // get font list
         let font_list: u32 = delphi_call!(0x6fb55c);
-        let mut message = String::new();
+        let mut missing_fonts = HashSet::new();
         for font in ide::FONTS.assets().iter().filter_map(Option::as_ref) {
             let index: i32 = delphi_call!(0x43ee44, font_list, font.sys_name.0);
             if index < 0 {
-                if message.is_empty() {
-                    message = "Warning: this game uses the following fonts, which are not installed:".to_string();
-                }
-                message += "\n";
-                message += &font.sys_name.to_os_string().into_string().unwrap();
+                missing_fonts.insert(font.sys_name.clone());
             }
         }
         // free font list
         let _: u32 = delphi_call!(0x405a7c, font_list);
-        if !message.is_empty() {
+        if !missing_fonts.is_empty() {
+            let mut message = "Warning: this game uses the following fonts, which are not installed:".to_string();
+            for font in missing_fonts {
+                message += "\n";
+                message += &font.to_os_string().into_string().unwrap();
+            }
             show_message(message);
         }
     }