Extract dap commands into a separate file

1 files changed, 349 insertions, 0 deletions

diff --git a/helix-term/src/commands/dap.rs b/helix-term/src/commands/dap.rs
new file mode 100644
index 00000000..9509ada1
--- /dev/null
+++ b/helix-term/src/commands/dap.rs
@@ -0,0 +1,349 @@
+use super::{Context, Editor};
+use helix_dap::Client;
+use helix_lsp::block_on;
+
+use serde_json::{to_value, Value};
+use tokio_stream::wrappers::UnboundedReceiverStream;
+
+use std::collections::HashMap;
+
+// DAP
+pub fn dap_start_impl(
+    editor: &mut Editor,
+    name: Option<&str>,
+    socket: Option<std::net::SocketAddr>,
+    params: Option<Vec<&str>>,
+) {
+    let (_, doc) = current!(editor);
+
+    let path = match doc.path() {
+        Some(path) => path.to_path_buf(),
+        None => {
+            editor.set_error("Can't start debug: document has no path".to_string());
+            return;
+        }
+    };
+
+    let config = editor
+        .syn_loader
+        .language_config_for_file_name(&path)
+        .and_then(|x| x.debugger.clone());
+    let config = match config {
+        Some(c) => c,
+        None => {
+            editor.set_error(
+                "Can't start debug: no debug adapter available for language".to_string(),
+            );
+            return;
+        }
+    };
+
+    let result = match socket {
+        Some(socket) => block_on(Client::tcp(socket, 0)),
+        None => block_on(Client::process(
+            config.transport.clone(),
+            config.command.clone(),
+            config.args.clone(),
+            config.port_arg.clone(),
+            0,
+        )),
+    };
+
+    let (mut debugger, events) = match result {
+        Ok(r) => r,
+        Err(e) => {
+            editor.set_error(format!("Failed to start debug session: {:?}", e));
+            return;
+        }
+    };
+
+    let request = debugger.initialize(config.name.clone());
+    if let Err(e) = block_on(request) {
+        editor.set_error(format!("Failed to initialize debug adapter: {:?}", e));
+        return;
+    }
+
+    let start_config = match name {
+        Some(name) => config.templates.iter().find(|t| t.name == name),
+        None => config.templates.get(0),
+    };
+    let start_config = match start_config {
+        Some(c) => c,
+        None => {
+            editor.set_error("Can't start debug: no debug config with given name".to_string());
+            return;
+        }
+    };
+
+    let template = start_config.args.clone();
+    let mut args: HashMap<String, Value> = HashMap::new();
+
+    if let Some(params) = params {
+        for (k, t) in template {
+            let mut value = t;
+            for (i, x) in params.iter().enumerate() {
+                // For param #0 replace {0} in args
+                value = value.replace(format!("{{{}}}", i).as_str(), x);
+            }
+
+            if let Ok(integer) = value.parse::<usize>() {
+                args.insert(k, Value::Number(serde_json::Number::from(integer)));
+            } else {
+                args.insert(k, Value::String(value));
+            }
+        }
+    }
+
+    let args = to_value(args).unwrap();
+
+    let result = match &start_config.request[..] {
+        "launch" => block_on(debugger.launch(args)),
+        "attach" => block_on(debugger.attach(args)),
+        _ => {
+            editor.set_error("Unsupported request".to_string());
+            return;
+        }
+    };
+    if let Err(e) = result {
+        editor.set_error(format!("Failed {} target: {:?}", start_config.request, e));
+        return;
+    }
+
+    // TODO: either await "initialized" or buffer commands until event is received
+    editor.debugger = Some(debugger);
+    let stream = UnboundedReceiverStream::new(events);
+    editor.debugger_events.push(stream);
+}
+
+pub fn dap_launch(cx: &mut Context) {
+    if cx.editor.debugger.is_some() {
+        cx.editor
+            .set_error("Can't start debug: debugger is running".to_string());
+        return;
+    }
+
+    let (_, doc) = current!(cx.editor);
+    let path = match doc.path() {
+        Some(path) => path.to_path_buf(),
+        None => {
+            cx.editor
+                .set_error("Can't start debug: document has no path".to_string());
+            return;
+        }
+    };
+
+    let config = cx
+        .editor
+        .syn_loader
+        .language_config_for_file_name(&path)
+        .and_then(|x| x.debugger.clone());
+    let config = match config {
+        Some(c) => c,
+        None => {
+            cx.editor.set_error(
+                "Can't start debug: no debug adapter available for language".to_string(),
+            );
+            return;
+        }
+    };
+
+    cx.editor.debug_config_picker = Some(config.templates.iter().map(|t| t.name.clone()).collect());
+    cx.editor.debug_config_completions = Some(
+        config
+            .templates
+            .iter()
+            .map(|t| t.completion.clone())
+            .collect(),
+    );
+}
+
+pub fn dap_toggle_breakpoint(cx: &mut Context) {
+    let (view, doc) = current!(cx.editor);
+    let text = doc.text().slice(..);
+    let pos = doc.selection(view.id).primary().cursor(text);
+
+    let breakpoint = helix_dap::SourceBreakpoint {
+        line: text.char_to_line(pos) + 1, // convert from 0-indexing to 1-indexing (TODO: could set debugger to 0-indexing on init)
+        ..Default::default()
+    };
+
+    let path = match doc.path() {
+        Some(path) => path.to_path_buf(),
+        None => {
+            cx.editor
+                .set_error("Can't set breakpoint: document has no path".to_string());
+            return;
+        }
+    };
+
+    // TODO: need to map breakpoints over edits and update them?
+    // we shouldn't really allow editing while debug is running though
+
+    if let Some(debugger) = &mut cx.editor.debugger {
+        let breakpoints = debugger.breakpoints.entry(path.clone()).or_default();
+        if let Some(pos) = breakpoints.iter().position(|b| b.line == breakpoint.line) {
+            breakpoints.remove(pos);
+        } else {
+            breakpoints.push(breakpoint);
+        }
+
+        let breakpoints = breakpoints.clone();
+
+        let request = debugger.set_breakpoints(path, breakpoints);
+        if let Err(e) = block_on(request) {
+            cx.editor
+                .set_error(format!("Failed to set breakpoints: {:?}", e));
+        }
+    }
+}
+
+pub fn dap_run(cx: &mut Context) {
+    if let Some(debugger) = &mut cx.editor.debugger {
+        if debugger.is_running {
+            cx.editor
+                .set_status("Debuggee is already running".to_owned());
+            return;
+        }
+        let request = debugger.configuration_done();
+        if let Err(e) = block_on(request) {
+            cx.editor.set_error(format!("Failed to run: {:?}", e));
+            return;
+        }
+        debugger.is_running = true;
+    }
+}
+
+pub fn dap_continue(cx: &mut Context) {
+    if let Some(debugger) = &mut cx.editor.debugger {
+        if debugger.is_running {
+            cx.editor
+                .set_status("Debuggee is already running".to_owned());
+            return;
+        }
+
+        let request = debugger.continue_thread(debugger.stopped_thread.unwrap());
+        if let Err(e) = block_on(request) {
+            cx.editor.set_error(format!("Failed to continue: {:?}", e));
+            return;
+        }
+        debugger.is_running = true;
+        debugger.stack_pointer = None;
+    }
+}
+
+pub fn dap_pause(cx: &mut Context) {
+    if let Some(debugger) = &mut cx.editor.debugger {
+        if !debugger.is_running {
+            cx.editor.set_status("Debuggee is not running".to_owned());
+            return;
+        }
+
+        // FIXME: correct number here
+        let request = debugger.pause(0);
+        if let Err(e) = block_on(request) {
+            cx.editor.set_error(format!("Failed to pause: {:?}", e));
+        }
+    }
+}
+
+pub fn dap_step_in(cx: &mut Context) {
+    if let Some(debugger) = &mut cx.editor.debugger {
+        if debugger.is_running {
+            cx.editor
+                .set_status("Debuggee is already running".to_owned());
+            return;
+        }
+
+        let request = debugger.step_in(debugger.stopped_thread.unwrap());
+        if let Err(e) = block_on(request) {
+            cx.editor.set_error(format!("Failed to step: {:?}", e));
+        }
+    }
+}
+
+pub fn dap_step_out(cx: &mut Context) {
+    if let Some(debugger) = &mut cx.editor.debugger {
+        if debugger.is_running {
+            cx.editor
+                .set_status("Debuggee is already running".to_owned());
+            return;
+        }
+
+        let request = debugger.step_out(debugger.stopped_thread.unwrap());
+        if let Err(e) = block_on(request) {
+            cx.editor.set_error(format!("Failed to step: {:?}", e));
+        }
+    }
+}
+
+pub fn dap_next(cx: &mut Context) {
+    if let Some(debugger) = &mut cx.editor.debugger {
+        if debugger.is_running {
+            cx.editor
+                .set_status("Debuggee is already running".to_owned());
+            return;
+        }
+
+        let request = debugger.next(debugger.stopped_thread.unwrap());
+        if let Err(e) = block_on(request) {
+            cx.editor.set_error(format!("Failed to step: {:?}", e));
+        }
+    }
+}
+
+pub fn dap_variables(cx: &mut Context) {
+    if let Some(debugger) = &mut cx.editor.debugger {
+        if debugger.is_running {
+            cx.editor
+                .set_status("Cannot access variables while target is running".to_owned());
+            return;
+        }
+        if debugger.stack_pointer.is_none() {
+            cx.editor
+                .set_status("Cannot find current stack pointer to access variables".to_owned());
+            return;
+        }
+
+        let frame_id = debugger.stack_pointer.clone().unwrap().id;
+        let scopes = match block_on(debugger.scopes(frame_id)) {
+            Ok(s) => s,
+            Err(e) => {
+                cx.editor
+                    .set_error(format!("Failed to get scopes: {:?}", e));
+                return;
+            }
+        };
+        let mut variables = Vec::new();
+
+        for scope in scopes.iter() {
+            let response = block_on(debugger.variables(scope.variables_reference));
+
+            if let Ok(vars) = response {
+                for var in vars {
+                    let prefix = match var.data_type {
+                        Some(data_type) => format!("{} ", data_type),
+                        None => "".to_owned(),
+                    };
+                    variables.push(format!("{}{} = {}\n", prefix, var.name, var.value));
+                }
+            }
+        }
+
+        if !variables.is_empty() {
+            cx.editor.variables = Some(variables);
+            cx.editor.variables_page = 0;
+        }
+    }
+}
+
+pub fn dap_terminate(cx: &mut Context) {
+    if let Some(debugger) = &mut cx.editor.debugger {
+        let request = debugger.disconnect();
+        if let Err(e) = block_on(request) {
+            cx.editor
+                .set_error(format!("Failed to disconnect: {:?}", e));
+            return;
+        }
+        cx.editor.debugger = None;
+    }
+}