dash-frontend: Application list

dash-frontend/src/util/desktop_finder.rs

@@ -0,0 +1,129 @@
+use gio::prelude::{AppInfoExt, IconExt};
+use gtk::traits::IconThemeExt;
+
+#[derive(Debug)]
+pub struct DesktopEntry {
+	pub exec_path: String,
+	pub exec_args: Vec<String>,
+	pub app_name: String,
+	pub icon_path: Option<String>,
+	pub categories: Vec<String>,
+}
+
+pub struct EntrySearchCell {
+	pub exec_path: String,
+	pub exec_args: Vec<String>,
+	pub app_name: String,
+	pub icon_name: Option<String>,
+	pub categories: Vec<String>,
+}
+
+const CMD_BLACKLIST: [&str; 1] = [
+	"lsp-plugins", // LSP Plugins collection. They clutter the application list a lot
+];
+
+const CATEGORY_TYPE_BLACKLIST: [&str; 5] = ["GTK", "Qt", "X-XFCE", "X-Bluetooth", "ConsoleOnly"];
+
+pub fn find_entries() -> anyhow::Result<Vec<DesktopEntry>> {
+	let Some(icon_theme) = gtk::IconTheme::default() else {
+		anyhow::bail!("Failed to get current icon theme information");
+	};
+
+	let mut res = Vec::<DesktopEntry>::new();
+
+	let info = gio::AppInfo::all();
+
+	log::debug!("app entry count {}", info.len());
+
+	'outer: for app_entry in info {
+		let Some(app_entry_id) = app_entry.id() else {
+			log::warn!(
+				"failed to get desktop entry ID for application named \"{}\"",
+				app_entry.name()
+			);
+			continue;
+		};
+
+		let Some(desktop_app) = gio::DesktopAppInfo::new(&app_entry_id) else {
+			log::warn!(
+				"failed to find desktop app file from application named \"{}\"",
+				app_entry.name()
+			);
+			continue;
+		};
+
+		if desktop_app.is_nodisplay() || desktop_app.is_hidden() {
+			continue;
+		}
+
+		let Some(cmd) = desktop_app.commandline() else {
+			continue;
+		};
+
+		let name = String::from(desktop_app.name());
+
+		let exec = String::from(cmd.to_string_lossy());
+
+		for blacklisted in CMD_BLACKLIST {
+			if exec.contains(blacklisted) {
+				continue 'outer;
+			}
+		}
+
+		let (exec_path, exec_args) = match exec.split_once(" ") {
+			Some((left, right)) => (
+				String::from(left),
+				right
+					.split(" ")
+					.filter(|arg| !arg.starts_with('%')) // exclude arguments like "%f"
+					.map(String::from)
+					.collect(),
+			),
+			None => (exec, Vec::new()),
+		};
+
+		let icon_path = match desktop_app.icon() {
+			Some(icon) => {
+				if let Some(icon_str) = icon.to_string() {
+					if let Some(s_icon) = icon_theme.lookup_icon(&icon_str, 128, gtk::IconLookupFlags::GENERIC_FALLBACK) {
+						s_icon.filename().map(|p| String::from(p.to_string_lossy()))
+					} else {
+						None
+					}
+				} else {
+					None
+				}
+			}
+			None => None,
+		};
+
+		let categories: Vec<String> = match desktop_app.categories() {
+			Some(categories) => categories
+				.split(";")
+				.filter(|s| !s.is_empty())
+				.filter(|s| {
+					for b in CATEGORY_TYPE_BLACKLIST {
+						if *s == b {
+							return false;
+						}
+					}
+					true
+				})
+				.map(String::from)
+				.collect(),
+			None => Vec::new(),
+		};
+
+		let entry = DesktopEntry {
+			app_name: name,
+			categories,
+			exec_path,
+			exec_args,
+			icon_path,
+		};
+
+		res.push(entry);
+	}
+
+	Ok(res)
+}