feat: add support for additional search paths for icons

Blocked by https://github.com/oknozor/freedesktop-icons/pull/30

Needed to support application-provided icon directories in cosmic-applet-status-area

src/applet/mod.rs

@@ -281,17 +281,38 @@ impl Context {
         .class(crate::theme::Button::AppletIcon)
     }
 
+    pub fn get_icon_button_icon_with_path<'a, Message: Clone + 'static>(
+        &self,
+        icon_name: &'a str,
+        extra_search_path: Option<Vec<std::path::PathBuf>>,
+    ) -> Named {
+        let suggested_size = self.suggested_size(true);
+        widget::icon::from_name_with_path(icon_name, extra_search_path)
+            .symbolic(true)
+            .size(suggested_size.0)
+            .into()
+    }
+
+    pub fn icon_button<'a, Message: Clone + 'static>(
+        &self,
+        icon_name: &'a str,
+        extra_search_path: Option<Vec<std::path::PathBuf>>,
+    ) -> crate::widget::Button<'a, Message> {
+        self.icon_button_from_handle(self.get_icon_button_icon_with_path(icon_name, extra_search_path))
+    }
+
+    pub fn get_icon_button_icon<'a, Message: Clone + 'static>(
+        &self,
+        icon_name: &'a str,
+    ) -> Named {
+        self.get_icon_button_icon_with_path(icon_name, None)
+    }
+
     pub fn icon_button<'a, Message: Clone + 'static>(
         &self,
         icon_name: &'a str,
     ) -> crate::widget::Button<'a, Message> {
-        let suggested_size = self.suggested_size(true);
-        self.icon_button_from_handle(
-            widget::icon::from_name(icon_name)
-                .symbolic(true)
-                .size(suggested_size.0)
-                .into(),
-        )
+        self.icon_button_from_handle(self.get_icon_button_icon(icon_name))
     }
 
     pub fn applet_tooltip<'a, Message: 'static>(

src/widget/icon/mod.rs

@@ -36,6 +36,11 @@ pub fn from_name(name: impl Into<Arc<str>>) -> Named {
     Named::new(name)
 }
 
+/// Create an icon handle from its XDG icon name and additional search directories.
+pub fn from_name_with_path(name: impl Into<Arc<str>>, extra_search_path: Option<Vec<std::path::PathBuf>>) -> Named {
+    Named::new_with_path(name, extra_search_path)
+}
+
 /// An image which may be an SVG or PNG.
 #[must_use]
 #[derive(Clone, Setters)]

src/widget/icon/named.rs

@@ -36,10 +36,17 @@ pub struct Named {
 
     /// Prioritizes SVG over PNG
     pub prefer_svg: bool,
+
+    // Additional directories to search
+    extra_search_path: Option<Vec<std::path::PathBuf>>,
 }
 
 impl Named {
     pub fn new(name: impl Into<Arc<str>>) -> Self {
+        Named::new_with_path(name, None)
+    }
+
+    pub fn new_with_path(name: impl Into<Arc<str>>, extra_search_path: Option<Vec<std::path::PathBuf>>) -> Self {
         let name = name.into();
         let symbolic = name.ends_with("-symbolic");
         Self {
@@ -49,6 +56,7 @@ impl Named {
             size: None,
             scale: None,
             prefer_svg: symbolic,
+            extra_search_path,
         }
     }
 
@@ -69,6 +77,10 @@ impl Named {
             if let Some(size) = self.size {
                 lookup = lookup.with_size(size);
             }
+            
+            if let Some(extra_search_path) = self.extra_search_path {
+                lookup = lookup.with_extra_search_path(extra_search_path);
+            }
 
             if self.prefer_svg {
                 lookup = lookup.force_svg();