reload_config keybinding (defaults to ctrl+alt+super+space)

src/App.zig

@@ -135,7 +135,9 @@ fn drainMailbox(self: *App, rt_app: *apprt.App) !void {
 }
 
 fn reloadConfig(self: *App, rt_app: *apprt.App) !void {
+    log.debug("reloading configuration", .{});
     if (try rt_app.reloadConfig()) |new| {
+        log.debug("new configuration received, applying", .{});
         try self.updateConfig(new);
     }
 }

src/Surface.zig

@@ -852,6 +852,12 @@ pub fn keyCallback(
                 .unbind => unreachable,
                 .ignore => {},
 
+                .reload_config => {
+                    _ = self.app_mailbox.push(.{
+                        .reload_config = {},
+                    }, .{ .instant = {} });
+                },
+
                 .csi => |data| {
                     _ = self.io_thread.mailbox.push(.{
                         .write_stable = "\x1B[",

src/config.zig

@@ -239,6 +239,12 @@ pub const Config = struct {
         const alloc = result._arena.?.allocator();
 
         // Add our default keybindings
+        try result.keybind.set.put(
+            alloc,
+            .{ .key = .space, .mods = .{ .super = true, .alt = true, .ctrl = true } },
+            .{ .reload_config = {} },
+        );
+
         {
             // On macOS we default to super but Linux ctrl+shift since
             // ctrl+c is to kill the process.

src/input/Binding.zig

@@ -187,6 +187,12 @@ pub const Action = union(enum) {
     /// Focus on a split in a given direction.
     goto_split: SplitFocusDirection,
 
+    /// Reload the configuration. The exact meaning depends on the app runtime
+    /// in use but this usually involves re-reading the configuration file
+    /// and applying any changes. Note that not all changes can be applied at
+    /// runtime.
+    reload_config: void,
+
     /// Close the current "surface", whether that is a window, tab, split,
     /// etc. This only closes ONE surface.
     close_surface: void,