implement keymaps! they still have quite a bit of work to be any good...

but now our key do stuff when pressed (at the compositor level)

src/lua/api.zig

@@ -0,0 +1,91 @@
+const Api = @This();
+
+const std = @import("std");
+const server = &@import("../main.zig").server;
+const Keymap = @import("../keymap.zig");
+
+const zlua = @import("zlua");
+const xkb = @import("xkbcommon");
+const wlr = @import("wlroots");
+
+const gpa = std.heap.c_allocator;
+
+pub fn add_keymap(L: *zlua.Lua) i32 {
+  const nargs: i32 = L.getTop();
+  if (nargs < 3) {
+    L.raiseErrorStr("Expected at least three arguments", .{});
+    return 0;
+  }
+
+  // ensure the first three agrs of the correct types
+  L.checkType(1, .string);
+  L.checkType(2, .string);
+  L.checkType(3, .function);
+
+  var keymap: Keymap = undefined;
+
+  const mod = L.toString(1) catch {
+    L.raiseErrorStr("Lua error check your config", .{});
+    return 0;
+  };
+  var it = std.mem.splitScalar(u8, mod, '|');
+  var modifiers = wlr.Keyboard.ModifierMask{};
+  while (it.next()) |m| {
+    // TODO: can we generate this at comptime?
+    if (std.mem.eql(u8, m, "shift")) {
+      modifiers.shift = true;
+    } else if (std.mem.eql(u8, m, "caps")) {
+      modifiers.caps = true;
+    } else if (std.mem.eql(u8, m, "ctrl")) {
+      modifiers.ctrl = true;
+    } else if (std.mem.eql(u8, m, "alt")) {
+      modifiers.alt = true;
+    } else if (std.mem.eql(u8, m, "mod2")) {
+      modifiers.mod2 = true;
+    } else if (std.mem.eql(u8, m, "mod3")) {
+      modifiers.mod3 = true;
+    } else if (std.mem.eql(u8, m, "logo")) {
+      modifiers.logo = true;
+    } else if (std.mem.eql(u8, m, "mod5")) {
+      modifiers.mod5 = true;
+    }
+  }
+  keymap.modifier = modifiers;
+
+  const key = L.toString(2) catch {
+    L.raiseErrorStr("Lua error check your config", .{});
+    return 0;
+  };
+  keymap.keycode = xkb.Keysym.fromName(key, .no_flags);
+
+  L.checkType(3, .function);
+  keymap.lua_ref_idx = L.ref(zlua.registry_index) catch {
+    L.raiseErrorStr("Lua error check your config", .{});
+    return 0;
+  };
+
+  // FIXME: for som reason I can't seem to get this to validate that the 4th
+  // argument exists unless there's a 5th argument. It doesn't seem to matter
+  // what type the 5th is just that it's there.
+  if (nargs == 4) {
+    // L.checkType(4, .table);
+    // _ = L.pushString("on_release");
+    // _ = L.getTable(4);
+    // const b = L.toBoolean(-1);
+    // L.pop(-1);
+    // L.pop(-1);
+  }
+
+  const hash = Keymap.hash(keymap.modifier, keymap.keycode);
+  server.keymaps.put(hash, keymap) catch |err| {
+    std.log.err("Failed to add keymap to keymaps: {}", .{err});
+    return 0;
+  };
+
+  return 0;
+}
+
+pub fn get_keybind(L: *zlua.Lua) i32 {
+  _ = L;
+  return 0;
+}