Add 'Open library' button

Cargo.toml

@@ -52,6 +52,7 @@ libmpv-sys = { git = "git+https://github.com/ervanalb/libmpv-rs", rev="189f5e45d
 surfman = { version = "0.7.0", features = ["sm-x11"] }
 glow = "0.12.1"
 crossbeam = "0.8.2"
+open = "5.3.3"
 
 
 # For memory profiling (see also src/bin/main.rs)

src/bin/ui/library.rs

@@ -176,6 +176,15 @@ pub fn library_ui(ui: &mut egui::Ui, ctx: &Context, newly_opened: bool) -> Libra
                     response = LibraryResponse::AddNode(item.node_props.clone());
                 }
             }
+
+            ui.add_space(10.);
+            ui.vertical_centered(|ui| {
+                if ui.button("Open library folder").clicked() {
+                    open::that_detached(ctx.library_directory())
+                        .unwrap_or_else(|e| println!("Could not open library: {}", e));
+                }
+            });
+            ui.add_space(10.);
         });
 
     // Handle response

src/lib/context.rs

@@ -563,18 +563,21 @@ impl Context {
         self.render_target_states.get(&id)
     }
 
+    pub fn library_directory(&self) -> PathBuf {
+        self.resource_dir.join("library")
+    }
+
+    pub fn builtin_library_directory(&self) -> PathBuf {
+        self.resource_dir.join("builtin_library")
+    }
+
     /// Load content from disk or the library or something
-    pub fn fetch_library_path(&self, filename: &str) -> PathBuf {
-        let library_path = self.resource_dir.join("library").join(filename);
-        let builtin_library_path = self.resource_dir.join("builtin_library").join(filename);
-        if self.resource_dir.join("library").join(filename).exists() {
+    pub fn library_path(&self, filename: &str) -> PathBuf {
+        let library_path = self.library_directory().join(filename);
+        let builtin_library_path = self.builtin_library_directory().join(filename);
+        if library_path.exists() {
             library_path
-        } else if self
-            .resource_dir
-            .join("builtin_library")
-            .join(filename)
-            .exists()
-        {
+        } else if builtin_library_path.exists() {
             builtin_library_path
         } else {
             library_path
@@ -583,12 +586,12 @@ impl Context {
 
     /// Load content from disk or the library or something
     pub fn fetch_library_content(&self, filename: &str) -> io::Result<String> {
-        fs::read_to_string(self.fetch_library_path(filename))
+        fs::read_to_string(self.library_path(filename))
     }
 
     /// Load content from disk or the library or something as raw bytes
     pub fn fetch_library_content_bytes(&self, filename: &str) -> io::Result<Vec<u8>> {
-        fs::read(self.fetch_library_path(filename))
+        fs::read(self.library_path(filename))
     }
 
     /// List all files in the library and builtin_library directories

src/lib/movie_node.rs

@@ -174,7 +174,7 @@ impl MovieNodeState {
         {
             name.clone()
         } else {
-            ctx.fetch_library_path(name).to_string_lossy().to_string()
+            ctx.library_path(name).to_string_lossy().to_string()
         };
 
         let conf_file_path = ctx