Bring in mime icon implementation from cosmic-edit

Cargo.toml

@@ -21,6 +21,10 @@ default-features = false
 features = ["tokio", "winit"]
 #path = "../libcosmic"
 
+#TODO: clean up and send changes upstream
+[dependencies.systemicons]
+git = "https://github.com/jackpot51/systemicons"
+
 [features]
 default = ["wgpu"]
 wgpu = ["libcosmic/wgpu"]

src/main.rs

@@ -17,6 +17,8 @@ mod config;
 
 mod localize;
 
+mod mime_icon;
+
 use tab::Tab;
 mod tab;
 

src/mime_icon.rs

@@ -0,0 +1,58 @@
+// SPDX-License-Identifier: GPL-3.0-only
+
+use cosmic::widget::icon;
+use std::{collections::HashMap, path::Path, sync::Mutex};
+
+pub const FALLBACK_MIME_ICON: &str = "text-x-generic";
+
+#[derive(Debug, Eq, Hash, PartialEq)]
+struct MimeIconKey {
+    path: String,
+    size: u16,
+}
+
+struct MimeIconCache {
+    cache: HashMap<MimeIconKey, Option<icon::Handle>>,
+}
+
+impl MimeIconCache {
+    pub fn new() -> Self {
+        Self {
+            cache: HashMap::new(),
+        }
+    }
+
+    pub fn get(&mut self, key: MimeIconKey) -> Option<icon::Handle> {
+        self.cache
+            .entry(key)
+            .or_insert_with_key(|key| match systemicons::get_icon(&key.path, key.size) {
+                Ok(icon_kind) => match icon_kind {
+                    systemicons::Icon::Png(bytes) => Some(icon::from_raster_bytes(bytes)),
+                    systemicons::Icon::Svg(bytes) => Some(icon::from_svg_bytes(bytes)),
+                },
+                Err(err) => {
+                    log::warn!("failed to get icon for {:?}: {:?}", key, err);
+                    None
+                }
+            })
+            .clone()
+    }
+}
+
+lazy_static::lazy_static! {
+    static ref MIME_ICON_CACHE: Mutex<MimeIconCache> = Mutex::new(MimeIconCache::new());
+}
+
+pub fn mime_icon<P: AsRef<Path>>(path: P, size: u16) -> icon::Icon {
+    //TODO: smarter path handling
+    let path = path
+        .as_ref()
+        .to_str()
+        .expect("failed to convert path to UTF-8")
+        .to_owned();
+    let mut mime_icon_cache = MIME_ICON_CACHE.lock().unwrap();
+    match mime_icon_cache.get(MimeIconKey { path, size }) {
+        Some(handle) => icon::icon(handle).size(size),
+        None => icon::from_name(FALLBACK_MIME_ICON).size(size).icon(),
+    }
+}

src/tab.rs

@@ -12,6 +12,8 @@ use std::{
     time::{Duration, Instant},
 };
 
+use crate::mime_icon::mime_icon;
+
 const DOUBLE_CLICK_DURATION: Duration = Duration::from_millis(500);
 
 #[derive(Clone, Copy, Debug)]
@@ -24,7 +26,7 @@ pub struct Item {
     pub name: String,
     pub path: PathBuf,
     pub is_dir: bool,
-    pub icon: widget::icon::Named,
+    pub icon: widget::icon::Icon,
     pub select_time: Option<Instant>,
 }
 
@@ -73,14 +75,14 @@ impl Tab {
                     };
 
                     let path = entry.path();
-
                     let is_dir = path.is_dir();
-                    let icon = widget::icon::from_name(if is_dir {
-                        "folder"
+                    //TODO: configurable size
+                    let icon_size = 32;
+                    let icon = if is_dir {
+                        widget::icon::from_name("folder").size(icon_size).icon()
                     } else {
-                        //TODO: get icon from mime
-                        "text-x-generic"
-                    });
+                        mime_icon(&path, icon_size)
+                    };
 
                     self.items.push(Item {
                         name,
@@ -158,7 +160,7 @@ impl Tab {
             column = column.push(
                 widget::button(
                     widget::row::with_children(vec![
-                        item.icon.clone().size(32).icon().into(),
+                        item.icon.clone().into(),
                         widget::text(item.name.clone()).into(),
                     ])
                     .align_items(Alignment::Center)