libcosmic: Add desktop-file helpers

Cargo.toml

@@ -24,6 +24,8 @@ pipewire = ["ashpd?/pipewire"]
 process = ["dep:nix"]
 # Use rfd for file dialogs
 rfd = ["dep:rfd"]
+# Enables desktop files helpers
+desktop = ["process", "dep:freedesktop-desktop-entry", "dep:shlex"]
 # Enables keycode serialization
 serde-keycode = ["iced_core/serde"]
 # Prevents multiple separate process instances.
@@ -78,6 +80,8 @@ zbus = {version = "3.14.1", default-features = false, optional = true}
 
 [target.'cfg(unix)'.dependencies]
 freedesktop-icons = "0.2.5"
+freedesktop-desktop-entry = { version = "0.5.0", optional = true }
+shlex = { version = "1.3.0", optional = true }
 
 [dependencies.cosmic-theme]
 path = "cosmic-theme"
@@ -106,7 +110,6 @@ path = "./iced/futures"
 
 [dependencies.iced_accessibility]
 path = "./iced/accessibility"
-
 optional = true
 
 [dependencies.iced_tiny_skia]

src/desktop.rs

@@ -0,0 +1,212 @@
+pub use freedesktop_desktop_entry::DesktopEntry;
+use std::{
+    borrow::Cow,
+    path::{Path, PathBuf},
+};
+
+#[derive(Debug, Clone, PartialEq, Eq)]
+pub enum IconSource {
+    Name(String),
+    Path(PathBuf),
+}
+
+impl IconSource {
+    pub fn from_unknown(icon: &str) -> Self {
+        let icon_path = Path::new(icon);
+        if icon_path.is_absolute() && icon_path.exists() {
+            Self::Path(icon_path.into())
+        } else {
+            Self::Name(icon.into())
+        }
+    }
+
+    pub fn as_cosmic_icon(&self) -> crate::widget::icon::Icon {
+        match self {
+            Self::Name(name) => crate::widget::icon::from_name(name.as_str())
+                .size(128)
+                .fallback(Some(crate::widget::icon::IconFallback::Names(vec![
+                    "application-default".into(),
+                    "application-x-executable".into(),
+                ])))
+                .into(),
+            Self::Path(path) => crate::widget::icon(crate::widget::icon::from_path(path.clone())),
+        }
+    }
+}
+
+impl Default for IconSource {
+    fn default() -> Self {
+        Self::Name("application-default".to_string())
+    }
+}
+
+#[derive(Debug, Clone, PartialEq)]
+pub struct DesktopAction {
+    pub name: String,
+    pub exec: String,
+}
+
+#[derive(Debug, Clone, PartialEq, Default)]
+pub struct DesktopEntryData {
+    pub id: String,
+    pub name: String,
+    pub wm_class: Option<String>,
+    pub exec: Option<String>,
+    pub icon: IconSource,
+    pub path: Option<PathBuf>,
+    pub categories: String,
+    pub desktop_actions: Vec<DesktopAction>,
+    pub prefers_dgpu: bool,
+}
+
+pub fn load_applications<'a>(
+    locale: impl Into<Option<&'a str>>,
+    include_no_display: bool,
+) -> Vec<DesktopEntryData> {
+    load_applications_filtered(locale, |de| include_no_display || !de.no_display())
+}
+
+pub fn load_applications_for_app_ids<'a, 'b>(
+    locale: impl Into<Option<&'a str>>,
+    app_ids: impl AsRef<[&'b str]>,
+    fill_missing_ones: bool,
+) -> Vec<DesktopEntryData> {
+    let mut app_ids = Vec::from(app_ids.as_ref());
+    let mut applications = load_applications_filtered(locale, |de| {
+        if let Some(i) = app_ids
+            .iter()
+            .position(|id| id == &de.appid || id.eq(&de.startup_wm_class().unwrap_or_default()))
+        {
+            app_ids.remove(i);
+            true
+        } else {
+            false
+        }
+    });
+    if fill_missing_ones {
+        applications.extend(app_ids.into_iter().map(|app_id| DesktopEntryData {
+            id: app_id.to_string(),
+            name: app_id.to_string(),
+            icon: IconSource::default(),
+            ..Default::default()
+        }));
+    }
+    applications
+}
+
+pub fn load_applications_filtered<'a, F: FnMut(&DesktopEntry) -> bool>(
+    locale: impl Into<Option<&'a str>>,
+    mut filter: F,
+) -> Vec<DesktopEntryData> {
+    let locale = locale.into();
+
+    freedesktop_desktop_entry::Iter::new(freedesktop_desktop_entry::default_paths())
+        .filter_map(|path| {
+            std::fs::read_to_string(&path).ok().and_then(|input| {
+                DesktopEntry::decode(&path, &input).ok().and_then(|de| {
+                    if !filter(&de) {
+                        return None;
+                    }
+
+                    Some(DesktopEntryData::from_desktop_entry(locale, path.clone(), de))
+                })
+            })
+        })
+        .collect()
+}
+
+pub fn load_desktop_file<'a>(
+    locale: impl Into<Option<&'a str>>,
+    path: impl AsRef<Path>,
+) -> Option<DesktopEntryData> {
+    let path = path.as_ref();
+    std::fs::read_to_string(path).ok().and_then(|input| {
+        DesktopEntry::decode(path, &input)
+            .ok()
+            .map(|de| DesktopEntryData::from_desktop_entry(locale, PathBuf::from(path), de))
+    })
+}
+
+impl DesktopEntryData {
+    fn from_desktop_entry<'a>(
+        locale: impl Into<Option<&'a str>>,
+        path: impl Into<Option<PathBuf>>,
+        de: DesktopEntry,
+    ) -> DesktopEntryData {
+        let locale = locale.into();
+
+        let name = de
+            .name(locale)
+            .unwrap_or(Cow::Borrowed(de.appid))
+            .to_string();
+
+        // check if absolute path exists and otherwise treat it as a name
+        let icon = de.icon().unwrap_or(de.appid);
+        let icon_path = Path::new(icon);
+        let icon = if icon_path.is_absolute() && icon_path.exists() {
+            IconSource::Path(icon_path.into())
+        } else {
+            IconSource::Name(icon.into())
+        };
+
+        DesktopEntryData {
+            id: de.appid.to_string(),
+            wm_class: de.startup_wm_class().map(ToString::to_string),
+            exec: de.exec().map(ToString::to_string),
+            name,
+            icon,
+            path: path.into(),
+            categories: de.categories().unwrap_or_default().to_string(),
+            desktop_actions: de
+                .actions()
+                .map(|actions| {
+                    actions
+                        .split(';')
+                        .filter_map(|action| {
+                            let name = de.action_entry_localized(action, "Name", locale);
+                            let exec = de.action_entry(action, "Exec");
+                            if let (Some(name), Some(exec)) = (name, exec) {
+                                Some(DesktopAction {
+                                    name: name.to_string(),
+                                    exec: exec.to_string(),
+                                })
+                            } else {
+                                None
+                            }
+                        })
+                        .collect::<Vec<_>>()
+                })
+                .unwrap_or_default(),
+            prefers_dgpu: de.prefers_non_default_gpu(),
+        }
+    }
+}
+
+pub fn spawn_desktop_exec<S, I, K, V>(
+    exec: S,
+    env_vars: I,
+)
+where
+    S: AsRef<str>,
+    I: IntoIterator<Item = (K, V)>,
+    K: AsRef<OsStr>,
+    V: AsRef<OsStr>,
+
+{
+    let mut exec = shlex::Shlex::new(exec.as_ref());
+    let mut cmd = match exec.next() {
+        Some(cmd) if !cmd.contains('=') => std::process::Command::new(cmd),
+        _ => return,
+    };
+
+    for arg in exec {
+        // TODO handle "%" args here if necessary?
+        if !arg.starts_with('%') {
+            cmd.arg(arg);
+        }
+    }
+
+    cmd.envs(env_vars);
+
+    crate::process::spawn(cmd)
+}

src/lib.rs

@@ -55,6 +55,8 @@ pub use iced_winit;
 pub mod icon_theme;
 pub mod keyboard_nav;
 
+#[cfg(feature = "desktop")]
+pub mod desktop;
 #[cfg(feature = "process")]
 pub mod process;