feat(settings): global setting for icon theme

src/settings.rs

@@ -0,0 +1,31 @@
+use crate::font;
+use std::cell::RefCell;
+
+thread_local! {
+    /// The fallback icon theme to search if no icon theme was specified.
+    pub(crate) static DEFAULT_ICON_THEME: RefCell<String> = RefCell::new(String::from("Pop"));
+}
+
+/// The fallback icon theme to search if no icon theme was specified.
+#[must_use]
+pub fn default_icon_theme() -> String {
+    DEFAULT_ICON_THEME.with(|f| f.borrow().clone())
+}
+
+/// Set the fallback icon theme to search when loading system icons.
+pub fn set_default_icon_theme(name: impl Into<String>) {
+    DEFAULT_ICON_THEME.with(|f| *f.borrow_mut() = name.into());
+}
+
+/// Default iced settings for COSMIC applications.
+#[must_use]
+pub fn settings<Flags: Default>() -> iced::Settings<Flags> {
+    iced::Settings {
+        default_font: match font::FONT {
+            iced::Font::Default => None,
+            iced::Font::External { bytes, .. } => Some(bytes),
+        },
+        default_text_size: 18,
+        ..iced::Settings::default()
+    }
+}