fix: fully deinit keybind.Mode to avoid race when switching modes

Makes more sense to update last_used after loading as we may need to add the entry.

src/Project.zig

@@ -31,6 +31,7 @@ persistent: bool = false,
 logger: log.Logger,
 logger_lsp: log.Logger,
 logger_git: log.Logger,
+last_used: i128,
 
 workspace: ?[]const u8 = null,
 
@@ -100,6 +101,7 @@ pub fn init(allocator: std.mem.Allocator, name: []const u8) OutOfMemoryError!Sel
         .logger = log.logger("project"),
         .logger_lsp = log.logger("lsp"),
         .logger_git = log.logger("git"),
+        .last_used = std.time.nanoTimestamp(),
     };
 }
 

src/keybind/keybind.zig

@@ -100,7 +100,7 @@ const Handler = struct {
 
 pub const Mode = struct {
     allocator: std.mem.Allocator,
-    input_handler: EventHandler,
+    input_handler: ?EventHandler,
     event_handler: ?EventHandler = null,
 
     mode: []const u8,
@@ -121,11 +121,24 @@ pub const Mode = struct {
     }
 
     pub fn deinit(self: *Mode) void {
-        if (self.deinit_command) |deinit_command|
-            deinit_command.execute_const();
-        self.allocator.free(self.mode);
-        self.input_handler.deinit();
+        if (self.deinit_command) |deinit_command| deinit_command.execute_const();
         if (self.event_handler) |eh| eh.deinit();
+        if (self.input_handler) |ih| ih.deinit();
+        self.allocator.free(self.mode);
+
+        self.deinit_command = null;
+        self.event_handler = null;
+        self.input_handler = null;
+        self.mode = &.{};
+
+        self.name = "";
+        self.line_numbers = .inherit;
+        self.keybind_hints = &.{};
+        self.cursor_shape = null;
+        self.selection_style = .normal;
+        self.init_command = null;
+        self.deinit_command = null;
+        self.initialized = false;
     }
 };
 

src/project_manager.zig

@@ -463,15 +463,16 @@ const Process = struct {
     }
 
     fn open(self: *Process, project_directory: []const u8) (SpawnError || std.fs.Dir.OpenError)!void {
-        if (self.projects.get(project_directory) == null) {
+        if (self.projects.get(project_directory)) |project| {
+            project.last_used = std.time.nanoTimestamp();
+            self.logger.print("switched to: {s}", .{project_directory});
+        } else {
             self.logger.print("opening: {s}", .{project_directory});
             const project = try self.allocator.create(Project);
             project.* = try Project.init(self.allocator, project_directory);
             try self.projects.put(self.allocator, try self.allocator.dupe(u8, project_directory), project);
             self.restore_project(project) catch |e| self.logger.err("restore_project", e);
             project.query_git();
-        } else {
-            self.logger.print("switched to: {s}", .{project_directory});
         }
     }
 
@@ -505,10 +506,35 @@ const Process = struct {
         return project.request_new_or_modified_files(from, max);
     }
 
-    fn request_recent_projects(self: *Process, from: tp.pid_ref, project_directory: []const u8) (ProjectError || Project.ClientError)!void {
+    fn request_recent_projects(self: *Process, from: tp.pid_ref, active_project: []const u8) (ProjectError || Project.ClientError)!void {
         var recent_projects: std.ArrayList(RecentProject) = .empty;
         defer recent_projects.deinit(self.allocator);
-        self.load_recent_projects(&recent_projects, project_directory) catch {};
+        self.load_recent_projects(&recent_projects) catch {};
+        for (recent_projects.items) |*recent_project| {
+            if (std.mem.eql(u8, active_project, recent_project.name)) {
+                recent_project.last_used = std.math.maxInt(i128);
+                break;
+            }
+        } else {
+            (try recent_projects.addOne(self.allocator)).* = .{
+                .name = try self.allocator.dupe(u8, active_project),
+                .last_used = std.math.maxInt(i128),
+            };
+        }
+        var iter = self.projects.iterator();
+        while (iter.next()) |item| {
+            for (recent_projects.items) |*recent_project| {
+                if (std.mem.eql(u8, item.value_ptr.*.name, recent_project.name)) {
+                    recent_project.last_used = item.value_ptr.*.last_used;
+                    break;
+                }
+            } else {
+                (try recent_projects.addOne(self.allocator)).* = .{
+                    .name = try self.allocator.dupe(u8, item.value_ptr.*.name),
+                    .last_used = item.value_ptr.*.last_used,
+                };
+            }
+        }
         self.sort_projects_by_last_used(&recent_projects);
         var message: std.Io.Writer.Allocating = .init(self.allocator);
         defer message.deinit();
@@ -521,6 +547,7 @@ const Process = struct {
             try cbor.writeArrayHeader(writer, 2);
             try cbor.writeValue(writer, project.name);
             try cbor.writeValue(writer, if (self.projects.get(project.name)) |_| true else false);
+            self.allocator.free(project.name);
         }
         from.send_raw(.{ .buf = message.written() }) catch return error.ClientFailed;
         self.logger.print("{d} projects found", .{recent_projects.items.len});
@@ -755,7 +782,7 @@ const Process = struct {
         return stream.toOwnedSlice();
     }
 
-    fn load_recent_projects(self: *Process, recent_projects: *std.ArrayList(RecentProject), project_directory: []const u8) !void {
+    fn load_recent_projects(self: *Process, recent_projects: *std.ArrayList(RecentProject)) !void {
         var path: std.Io.Writer.Allocating = .init(self.allocator);
         defer path.deinit();
         const writer = &path.writer;
@@ -768,7 +795,7 @@ const Process = struct {
         var iter = dir.iterate();
         while (try iter.next()) |entry| {
             if (entry.kind != .file) continue;
-            try self.read_project_name(path.written(), entry.name, recent_projects, project_directory);
+            try self.read_project_name(path.written(), entry.name, recent_projects);
         }
     }
 
@@ -777,7 +804,6 @@ const Process = struct {
         state_dir: []const u8,
         file_path: []const u8,
         recent_projects: *std.ArrayList(RecentProject),
-        project_directory: []const u8,
     ) !void {
         var path: std.Io.Writer.Allocating = .init(self.allocator);
         defer path.deinit();
@@ -795,10 +821,8 @@ const Process = struct {
 
         var iter: []const u8 = buffer;
         var name: []const u8 = undefined;
-        if (cbor.matchValue(&iter, tp.extract(&name)) catch return) {
-            const last_used = if (std.mem.eql(u8, project_directory, name)) std.math.maxInt(@TypeOf(stat.mtime)) else stat.mtime;
-            (try recent_projects.addOne(self.allocator)).* = .{ .name = try self.allocator.dupe(u8, name), .last_used = last_used };
-        }
+        if (cbor.matchValue(&iter, tp.extract(&name)) catch return)
+            (try recent_projects.addOne(self.allocator)).* = .{ .name = try self.allocator.dupe(u8, name), .last_used = stat.mtime };
     }
 
     fn sort_projects_by_last_used(_: *Process, recent_projects: *std.ArrayList(RecentProject)) void {

src/tui/tui.zig

@@ -554,7 +554,7 @@ fn active_event_handler(self: *Self) ?EventHandler {
 fn dispatch_flush_input_event(self: *Self) error{ Exit, NoSpaceLeft }!void {
     var buf: [32]u8 = undefined;
     const mode = self.input_mode_ orelse return;
-    try mode.input_handler.send(tp.self_pid(), try tp.message.fmtbuf(&buf, .{"F"}));
+    if (mode.input_handler) |ih| try ih.send(tp.self_pid(), try tp.message.fmtbuf(&buf, .{"F"}));
     if (mode.event_handler) |eh| try eh.send(tp.self_pid(), try tp.message.fmtbuf(&buf, .{"F"}));
 }
 
@@ -577,8 +577,8 @@ fn dispatch_input(ctx: *anyopaque, cbor_msg: []const u8) void {
             break :ret false;
         })
             return;
-    if (self.input_mode_) |mode|
-        mode.input_handler.send(from, m) catch |e| self.logger.err("input handler", e);
+    if (self.input_mode_) |mode| if (mode.input_handler) |ih|
+        ih.send(from, m) catch |e| self.logger.err("input handler", e);
 }
 
 fn dispatch_mouse(ctx: *anyopaque, y: c_int, x: c_int, cbor_msg: []const u8) void {