fix(script): support AutoCAD .scr scripts with multi-line, single-line, and prefix handling

src/app/command_driver/utilities.rs

@@ -1097,4 +1097,62 @@ impl OpenCADStudio {
             return task;
         }
     }
+
+    /// Feed one line from a command script (.scr) into the command pipeline.
+    ///
+    /// If an interactive command is active, the line (or its tokens) is routed to
+    /// the active command's prompts (e.g. coordinates or options). If no command
+    /// is active, the line starts a new command (supporting both bare verbs and
+    /// inline single-line commands).
+    pub(in crate::app) fn feed_script_line(&mut self, line: &str) -> Task<Message> {
+        let i = self.active_tab;
+        let trimmed = line.trim();
+
+        // 1. Text editor currently open (e.g. TEXT command content step).
+        if self.text_inline.is_some() {
+            if let Some(editor) = self.text_inline.as_mut() {
+                editor.value = line.to_string();
+            }
+            let committed = self.text_inline_commit();
+            let task = self.post_editor_closed(committed);
+            return if committed {
+                Task::batch([task, Task::done(Message::CommandEscape)])
+            } else {
+                task
+            };
+        }
+
+        // 2. Blank line submits Enter to the active command (or repeats last).
+        if trimmed.is_empty() {
+            return self.feed_command(StepInput::Enter);
+        }
+
+        // 3. A command is currently active: route to its prompt handlers.
+        if self.tabs[i].active_cmd.is_some() {
+            if self.tabs[i]
+                .active_cmd
+                .as_ref()
+                .map(|c| c.input_kind().is_free_text())
+                .unwrap_or(false)
+            {
+                return self.feed_command(StepInput::Text(trimmed.to_string()));
+            }
+
+            let tokens: Vec<&str> = trimmed.split_whitespace().collect();
+            let mut tasks = Vec::new();
+            for tok in tokens {
+                if self.tabs[i].active_cmd.is_none() {
+                    // Preceding token finished the active command; remaining tokens start a new one.
+                    tasks.push(self.run_command_line(tok));
+                } else {
+                    tasks.push(self.feed_active_cmd(tok));
+                }
+            }
+            return Task::batch(tasks);
+        }
+
+        // 4. No command is active: run as top-level command.
+        self.run_command_line(trimmed)
+    }
 }
+

src/app/commands/fileops.rs

@@ -339,33 +339,55 @@ impl OpenCADStudio {
             // line is fed through the same command path the `--script` startup
             // flag uses. Blank rows submit Enter to the active command.
             "SCRIPT" | "SCR" => {
-                use crate::command::ValuePromptCommand;
-                let c = ValuePromptCommand::new("SCRIPT", "SCRIPT  path to the .scr file:");
-                self.command_line.push_info(&c.prompt());
-                self.tabs[i].active_cmd = Some(Box::new(c));
+                #[cfg(not(target_arch = "wasm32"))]
+                {
+                    return Some(Task::perform(
+                        async move {
+                            crate::sys::file_dialog()
+                                .add_filter("Script files (*.scr)", &["scr"])
+                                .pick_file()
+                                .await
+                                .map(|h| crate::sys::handle_path(&h))
+                        },
+                        |path| match path {
+                            Some(p) => Message::Command(format!("SCRIPT \"{}\"", p.display())),
+                            None => Message::Noop,
+                        },
+                    ));
+                }
+                #[cfg(target_arch = "wasm32")]
+                {
+                    use crate::command::ValuePromptCommand;
+                    let c = ValuePromptCommand::new("SCRIPT", "SCRIPT  path to the .scr file:");
+                    self.command_line.push_info(&c.prompt());
+                    self.tabs[i].active_cmd = Some(Box::new(c));
+                }
             }
             cmd if cmd.starts_with("SCRIPT ") || cmd.starts_with("SCR ") => {
                 let path = cmd.split_once(' ').map(|(_, r)| r.trim().to_string());
                 match path {
-                    Some(p) if !p.is_empty() => match std::fs::read_to_string(&p) {
-                        Ok(text) => {
-                            let cmds: Vec<Task<Message>> = text
-                                .lines()
-                                .map(str::trim)
-                                .filter(|l| !l.starts_with('#') && !l.starts_with(';'))
-                                .map(|l| Task::done(Message::ScriptLine(l.to_string())))
-                                .collect();
-                            self.command_line.push_output(crate::tf!(
-                                "SCRIPT: running {} command(s) from {p}.",
-                                cmds.len()
-                            ).as_ref());
-                            return Some(Task::batch(cmds));
+                    Some(p) if !p.is_empty() => {
+                        let clean_path = p.trim().trim_matches(|c| c == '"' || c == '\'');
+                        match std::fs::read_to_string(clean_path) {
+                            Ok(text) => {
+                                let cmds: Vec<Task<Message>> = text
+                                    .lines()
+                                    .map(str::trim)
+                                    .filter(|l| !l.starts_with('#') && !l.starts_with(';'))
+                                    .map(|l| Task::done(Message::ScriptLine(l.to_string())))
+                                    .collect();
+                                self.command_line.push_output(crate::tf!(
+                                    "SCRIPT: running {} command(s) from {clean_path}.",
+                                    cmds.len()
+                                ).as_ref());
+                                return Some(Task::batch(cmds));
+                            }
+                            Err(e) => {
+                                self.command_line
+                                    .push_error(crate::tf!("SCRIPT: cannot read {clean_path}: {e}").as_ref());
+                            }
                         }
-                        Err(e) => {
-                            self.command_line
-                                .push_error(crate::tf!("SCRIPT: cannot read {p}: {e}").as_ref());
-                        }
-                    },
+                    }
                     _ => {
                         self.command_line
                             .push_info(crate::t!("Usage: SCRIPT <path to .scr file>").as_ref());
@@ -418,3 +440,96 @@ fn parse_background_color(args: &[&str]) -> Option<[f32; 4]> {
     }
     None
 }
+
+#[cfg(test)]
+mod tests {
+    use crate::app::{Message, OpenCADStudio};
+
+    fn fresh_app() -> OpenCADStudio {
+        let mut app = OpenCADStudio::new_for_test();
+        app.automation_op(r#"{"op":"new"}"#);
+        app
+    }
+
+    #[test]
+    fn multiline_script_draws_line() {
+        let mut app = fresh_app();
+        let i = app.active_tab;
+        let before_count = app.tabs[i].scene.document.entities().count();
+
+        // Feed standard multi-line CAD script sequence
+        let _ = app.update(Message::ScriptLine("LINE".into()));
+        assert!(app.tabs[i].active_cmd.is_some(), "LINE command should be active");
+
+        let _ = app.update(Message::ScriptLine("0,0".into()));
+        assert!(app.tabs[i].active_cmd.is_some(), "LINE command should stay active after first point");
+
+        let _ = app.update(Message::ScriptLine("10,10".into()));
+        let _ = app.update(Message::ScriptLine("".into())); // Enter to finish
+
+        let after_count = app.tabs[i].scene.document.entities().count();
+        assert_eq!(after_count, before_count + 1, "Line entity should have been created");
+        assert!(app.tabs[i].active_cmd.is_none(), "LINE command should be finished");
+    }
+
+    #[test]
+    fn single_line_script_still_works() {
+        let mut app = fresh_app();
+        let i = app.active_tab;
+        let before_count = app.tabs[i].scene.document.entities().count();
+
+        let _ = app.update(Message::ScriptLine("CIRCLE 5,5 2".into()));
+
+        let after_count = app.tabs[i].scene.document.entities().count();
+        assert_eq!(after_count, before_count + 1, "Circle entity should have been created");
+        assert!(app.tabs[i].active_cmd.is_none(), "CIRCLE command should be finished");
+    }
+
+    #[test]
+    fn autodesk_command_prefixes_strip_underscore_and_dot() {
+        let mut app = fresh_app();
+        let i = app.active_tab;
+        let before_count = app.tabs[i].scene.document.entities().count();
+
+        let _ = app.update(Message::ScriptLine("_CIRCLE 10,10 3".into()));
+
+        let after_count = app.tabs[i].scene.document.entities().count();
+        assert_eq!(after_count, before_count + 1, "_CIRCLE should resolve to CIRCLE and create entity");
+    }
+
+    #[test]
+    fn test_script_scr_draws_all_entities() {
+        let mut app = fresh_app();
+        let i = app.active_tab;
+        const SCRIPT: &str = r#"
+_LINE
+0,0
+100,0
+100,100
+0,100
+C
+
+_LINE
+0,0
+100,100
+
+_LINE
+0,100
+100,0
+
+CIRCLE
+50,50
+35
+
+CIRCLE 50,50 15
+
+ZOOM EXTENTS
+"#;
+        for line in SCRIPT.lines().map(str::trim).filter(|l| !l.starts_with('#') && !l.starts_with(';')) {
+            let _ = app.update(Message::ScriptLine(line.to_string()));
+        }
+        // 4 square edges + 2 diagonal lines + 2 circles = 8 entities
+        assert_eq!(app.tabs[i].scene.document.entities().count(), 8);
+    }
+}
+

src/app/commands/mod.rs

@@ -113,6 +113,11 @@ impl OpenCADStudio {
             Some(rest) => (rest.trim(), true),
             None => (cmd, false),
         };
+        let cmd = cmd.trim();
+        // AutoCAD command prefixes: '_' (international name), '.' (built-in name bypass)
+        let cmd = cmd.strip_prefix('.').unwrap_or(cmd);
+        let cmd = cmd.strip_prefix('_').unwrap_or(cmd);
+        let cmd = cmd.strip_prefix('.').unwrap_or(cmd);
         let resolved = self.resolve_alias(cmd);
         let cmd = resolved.as_deref().unwrap_or(cmd);
         if is_spacemouse_command(cmd) {

src/app/mod.rs

@@ -1294,6 +1294,7 @@ pub(super) struct OpenCADStudio {
     /// drawings in a file manager produces exactly that (one process per file,
     /// all arriving at once), which makes this queue load-bearing, not polish.
     pub(super) pending_opens: std::collections::VecDeque<PathBuf>,
+    pub(super) pending_startup_script_lines: Vec<String>,
     /// One global interaction-index build at a time. Large drawings can each
     /// hold millions of entries, so file-open bursts must not multiply peak
     /// CPU and memory by the number of tabs.
@@ -4278,6 +4279,7 @@ impl OpenCADStudio {
             missing_fonts_downloading: false,
             suppressed_missing_fonts: rustc_hash::FxHashSet::default(),
             pending_opens: std::collections::VecDeque::new(),
+            pending_startup_script_lines: Vec::new(),
             active_interaction_index: None,
             queued_interaction_indices: std::collections::VecDeque::new(),
             pending_close: None,
@@ -4624,21 +4626,26 @@ impl OpenCADStudio {
             s.command_line.push_warning(&notice);
             crate::scene::pipeline::report_gpu_line(&format!("[gpu] {notice}"));
         }
-        let cli_open: Task<Message> = if !cfg.files.is_empty() {
+        let has_files = !cfg.files.is_empty();
+        let cli_open: Task<Message> = if has_files {
             Task::batch(
                 cfg.files
                     .into_iter()
                     .map(|p| Task::done(Message::OpenExternal(p))),
             )
-        } else if cfg.new {
+        } else if cfg.new || !cfg.script_lines.is_empty() {
             Task::done(Message::TabNew)
         } else {
             Task::none()
         };
-        // Startup command script: each line dispatched as if typed at the
-        // command line, in order, after any file open is requested.
+        // Startup command script: if files were passed to open, defer the
+        // script lines until the document finishes opening. Otherwise, dispatch
+        // them on the newly created drawing tab.
         let script: Task<Message> = if cfg.script_lines.is_empty() {
             Task::none()
+        } else if has_files {
+            s.pending_startup_script_lines = cfg.script_lines;
+            Task::none()
         } else {
             Task::batch(
                 cfg.script_lines

src/app/update/file.rs

@@ -1976,7 +1976,13 @@ impl OpenCADStudio {
             }
             self.drain_pending_open()
         };
-        Task::batch([thumbs_task, pending_open_task, interaction_task])
+        let startup_script_task = if !self.pending_startup_script_lines.is_empty() {
+            let lines = std::mem::take(&mut self.pending_startup_script_lines);
+            Task::batch(lines.into_iter().map(|l| Task::done(Message::ScriptLine(l))))
+        } else {
+            Task::none()
+        };
+        Task::batch([thumbs_task, pending_open_task, interaction_task, startup_script_task])
     }
 
     pub(super) fn on_wblock_save_result_some(

src/app/update/mod.rs

@@ -982,6 +982,9 @@ impl OpenCADStudio {
                     .extension()
                     .map(|e| e.to_string_lossy().to_lowercase())
                     .unwrap_or_default();
+                if ext == "scr" {
+                    return self.dispatch_command(&format!("SCRIPT \"{}\"", path.display()));
+                }
                 if !matches!(ext.as_str(), "dwg" | "dxf" | "bak" | "sv$") {
                     self.command_line.push_error(
                         crate::tf!("Unsupported file type: {}", path.display()).as_ref(),
@@ -2506,13 +2509,7 @@ impl OpenCADStudio {
                 self.dispatch_command(&cmd)
             }
 
-            Message::ScriptLine(line) => {
-                if line.trim().is_empty() {
-                    self.feed_command(crate::command::StepInput::Enter)
-                } else {
-                    self.run_command_line(&line)
-                }
-            }
+            Message::ScriptLine(line) => self.feed_script_line(&line),
 
             Message::ToggleLayers => {
                 if self.active_modal == Some(super::ModalKind::Layers) {