feat: implement OS bridge and enhance app launcher functionality

crates/plugins/plugin-apps/src/linux.rs

@@ -0,0 +1,133 @@
+#![cfg(target_os = "linux")]
+
+use std::path::Path;
+
+use crate::{AppName, DesktopEntry, DesktopEntrySource, ExecCommand, IconPath};
+use crate::humanize_category;
+
+pub struct FsDesktopEntrySource;
+
+impl FsDesktopEntrySource {
+    pub fn new() -> Self {
+        Self
+    }
+}
+
+impl Default for FsDesktopEntrySource {
+    fn default() -> Self {
+        Self::new()
+    }
+}
+
+impl DesktopEntrySource for FsDesktopEntrySource {
+    fn entries(&self) -> Vec<DesktopEntry> {
+        let mut dirs = Vec::new();
+        if let Ok(xdg) = xdg::BaseDirectories::new() {
+            dirs.push(xdg.get_data_home().join("applications"));
+            for d in xdg.get_data_dirs() {
+                dirs.push(d.join("applications"));
+            }
+        }
+        let mut entries = Vec::new();
+        for dir in &dirs {
+            if let Ok(read_dir) = std::fs::read_dir(dir) {
+                for entry in read_dir.flatten() {
+                    let path = entry.path();
+                    if path.extension().and_then(|e| e.to_str()) != Some("desktop") {
+                        continue;
+                    }
+                    if let Some(de) = parse_desktop_file(&path) {
+                        entries.push(de);
+                    }
+                }
+            }
+        }
+        entries
+    }
+}
+
+pub fn resolve_icon_path(name: &str) -> Option<String> {
+    if name.starts_with('/') && Path::new(name).exists() {
+        return Some(name.to_string());
+    }
+    let candidates = [
+        format!("/usr/share/pixmaps/{name}.png"),
+        format!("/usr/share/pixmaps/{name}.svg"),
+        format!("/usr/share/icons/hicolor/48x48/apps/{name}.png"),
+        format!("/usr/share/icons/hicolor/scalable/apps/{name}.svg"),
+    ];
+    candidates.into_iter().find(|p| Path::new(p).exists())
+}
+
+fn parse_desktop_file(path: &Path) -> Option<DesktopEntry> {
+    let content = std::fs::read_to_string(path).ok()?;
+    let mut in_section = false;
+    let mut name: Option<String> = None;
+    let mut exec: Option<String> = None;
+    let mut icon: Option<String> = None;
+    let mut category: Option<String> = None;
+    let mut keywords: Vec<String> = Vec::new();
+    let mut is_application = false;
+    let mut no_display = false;
+
+    for line in content.lines() {
+        let line = line.trim();
+        if line == "[Desktop Entry]" {
+            in_section = true;
+            continue;
+        }
+        if line.starts_with('[') {
+            in_section = false;
+            continue;
+        }
+        if !in_section || line.starts_with('#') || line.is_empty() {
+            continue;
+        }
+        if let Some((key, value)) = line.split_once('=') {
+            match key.trim() {
+                "Name" if name.is_none() => name = Some(value.trim().to_string()),
+                "Exec" if exec.is_none() => exec = Some(value.trim().to_string()),
+                "Icon" if icon.is_none() => icon = Some(value.trim().to_string()),
+                "Type" if !is_application => is_application = value.trim() == "Application",
+                "NoDisplay" => no_display = value.trim().eq_ignore_ascii_case("true"),
+                "Categories" if category.is_none() => {
+                    category = value.trim()
+                        .split(';')
+                        .find(|s| !s.is_empty())
+                        .map(|s| humanize_category(s.trim()));
+                }
+                "Keywords" if keywords.is_empty() => {
+                    keywords = value.trim()
+                        .split(';')
+                        .filter(|s| !s.is_empty())
+                        .map(|s| s.trim().to_string())
+                        .collect();
+                }
+                _ => {}
+            }
+        }
+    }
+
+    if !is_application || no_display {
+        return None;
+    }
+
+    let exec_clean: String = exec?
+        .split_whitespace()
+        .filter(|s| !s.starts_with('%'))
+        .fold(String::new(), |mut acc, s| {
+            if !acc.is_empty() {
+                acc.push(' ');
+            }
+            acc.push_str(s);
+            acc
+        });
+
+    Some(DesktopEntry {
+        name: AppName::new(name?),
+        exec: ExecCommand::new(exec_clean),
+        icon: icon.map(IconPath::new),
+        category,
+        keywords,
+    })
+}