From 43a4228ca4901e19c943bb7a6c4f508ba76477e4 Mon Sep 17 00:00:00 2001
From: norepro <30921834+norepro@users.noreply.github.com>
Date: Thu, 2 Jul 2026 08:52:14 -0700
Subject: [PATCH] feat: support MIME subclasses in file chooser dialog

---
 src/dialog.rs    | 4 +++-
 src/mime_icon.rs | 8 ++++++++
 2 files changed, 11 insertions(+), 1 deletion(-)

diff --git a/src/dialog.rs b/src/dialog.rs
index 0623da0..7b47b7a 100644
--- a/src/dialog.rs
+++ b/src/dialog.rs
@@ -40,7 +40,7 @@ use crate::localize::LANGUAGE_SORTER;
 use crate::mounter::{MOUNTERS, MounterItem, MounterItems, MounterKey, MounterMessage};
 use crate::tab::{self, ItemMetadata, Location, SearchLocation, Tab};
 use crate::zoom::{zoom_in_view, zoom_out_view, zoom_to_default};
-use crate::{fl, home_dir, menu};
+use crate::{fl, home_dir, menu, mime_icon};
 
 #[derive(Clone, Debug)]
 pub struct DialogMessage(cosmic::Action<Message>);
@@ -1919,11 +1919,13 @@ impl Application for App {
                         items.retain(|item| {
                             // Directories are always shown
                             item.metadata.is_dir()
+                                // Check for mime type match (first because it is faster)
                                     || mimes.iter().any(|filter_mime| {
                                         if filter_mime.subtype() == mime::STAR {
                                             filter_mime.type_() == item.mime.type_()
                                         } else {
                                             *filter_mime == item.mime
+                                                || mime_icon::is_mime_subclass_of(&item.mime, filter_mime)
                                         }
                                     })
                                 // Check for glob match (last because it is slower)
diff --git a/src/mime_icon.rs b/src/mime_icon.rs
index 1c1bf40..26d899d 100644
--- a/src/mime_icon.rs
+++ b/src/mime_icon.rs
@@ -124,3 +124,11 @@ pub fn parent_mime_types(mime: &Mime) -> Option<Vec<Mime>> {
     let mime_icon_cache = MIME_ICON_CACHE.lock().unwrap();
     mime_icon_cache.shared_mime_info.get_parents_aliased(mime)
 }
+
+pub fn is_mime_subclass_of(mime_type: &Mime, base: &Mime) -> bool {
+    let mime_icon_cache = MIME_ICON_CACHE.lock().unwrap();
+
+    mime_icon_cache
+        .shared_mime_info
+        .mime_type_subclass(mime_type, base)
+}