oxwm

const std = @import("std");

const VERSION = "v0.11.2";

const display_mod = @import("x11/display.zig");

const events = @import("x11/events.zig");

const xlib = @import("x11/xlib.zig");

const client_mod = @import("client.zig");

const monitor_mod = @import("monitor.zig");

const tiling = @import("layouts/tiling.zig");

const monocle = @import("layouts/monocle.zig");

const floating = @import("layouts/floating.zig");

const scrolling = @import("layouts/scrolling.zig");

const grid = @import("layouts/grid.zig");

const animations = @import("animations.zig");

const bar_mod = @import("bar/bar.zig");

const blocks_mod = @import("bar/blocks/blocks.zig");

const config_mod = @import("config/config.zig");

const lua = @import("config/lua.zig");

const overlay_mod = @import("overlay.zig");

const Display = display_mod.Display;

const Client = client_mod.Client;

const Monitor = monitor_mod.Monitor;

var running: bool = true;

var gpa = std.heap.GeneralPurposeAllocator(.{}){};

var wm_protocols: xlib.Atom = 0;

var wm_delete: xlib.Atom = 0;

var wm_state: xlib.Atom = 0;

var wm_take_focus: xlib.Atom = 0;

var net_supported: xlib.Atom = 0;

var net_wm_name: xlib.Atom = 0;

var net_wm_state: xlib.Atom = 0;

var net_wm_check: xlib.Atom = 0;

var net_wm_state_fullscreen: xlib.Atom = 0;

var net_active_window: xlib.Atom = 0;

var net_wm_window_type: xlib.Atom = 0;

var net_wm_window_type_dialog: xlib.Atom = 0;

var net_client_list: xlib.Atom = 0;

var wm_check_window: xlib.Window = 0;

var border_color_focused: c_ulong = 0x6dade3;

var border_color_unfocused: c_ulong = 0x444444;

var border_width: i32 = 2;

var gap_outer_v: i32 = 5;

var gap_outer_h: i32 = 5;

var gap_inner_h: i32 = 5;

var gap_inner_v: i32 = 5;

var tags: [9][]const u8 = .{ "1", "2", "3", "4", "5", "6", "7", "8", "9" };

var cursor_normal: xlib.Cursor = 0;

var cursor_resize: xlib.Cursor = 0;

var cursor_move: xlib.Cursor = 0;

const NormalState: c_long = 1;

const WithdrawnState: c_long = 0;

const IconicState: c_long = 3;

const IsViewable: c_int = 2;

const snap_distance: i32 = 32;

var numlock_mask: c_uint = 0;

var config: config_mod.Config = undefined;

var display_global: ?*Display = null;

var config_path_global: ?[]const u8 = null;

var scroll_animation: animations.Scroll_Animation = .{};

var animation_config: animations.Animation_Config = .{ .duration_ms = 150, .easing = .ease_out };

var chord_keys: [4]config_mod.Key_Press = [_]config_mod.Key_Press{.{}} ** 4;

var chord_index: u8 = 0;

var chord_timestamp: i64 = 0;

const chord_timeout_ms: i64 = 1000;

var keyboard_grabbed: bool = false;

var keybind_overlay: ?*overlay_mod.Keybind_Overlay = null;

fn print_help() void {

    std.debug.print(

        \\oxwm - A window manager

        \\

        \\USAGE:

        \\    oxwm [OPTIONS]

        \\

        \\OPTIONS:

        \\    --init              Create default config in ~/.config/oxwm/config.lua

        \\    --config <PATH>     Use custom config file

        \\    --validate          Validate config file without starting window manager

        \\    --version           Print version information

        \\    --help              Print this help message

        \\

        \\CONFIG:

        \\    Location: ~/.config/oxwm/config.lua

        \\    Edit the config file and use Mod+Shift+R to reload

        \\    No compilation needed - instant hot-reload!

        \\

        \\FIRST RUN:

        \\    Run 'oxwm --init' to create a config file

        \\    Or just start oxwm and it will create one automatically

        \\

    , .{});

}

fn get_config_path(allocator: std.mem.Allocator) ![]u8 {

    const home = std.posix.getenv("HOME") orelse return error.CouldNotGetHomeDir;

    const config_path = try std.fs.path.join(allocator, &.{ home, ".config", "oxwm", "config.lua" });

    return config_path;

}

fn init_config(allocator: std.mem.Allocator) void {

    const config_path = get_config_path(allocator) catch return;

    defer allocator.free(config_path);

    const template = @embedFile("templates/config.lua");

    const file = std.fs.createFileAbsolute(config_path, .{}) catch |err| {

        std.debug.print("error: could not create config file: {}\n", .{err});

        return;

    };

    defer file.close();

    _ = file.writeAll(template) catch |err| {

        std.debug.print("error: could not write config file: {}\n", .{err});

        return;

    };

    std.debug.print("Config created at {s}\n", .{config_path});

    std.debug.print("Edit the file and reload with Mod+Shift+R\n", .{});

    std.debug.print("No compilation needed - changes take effect immediately!\n", .{});

}

fn validate_config(allocator: std.mem.Allocator, config_path: []const u8) !void {

    config = config_mod.Config.init(allocator);

    defer config.deinit();

    if (!lua.init(&config)) {

        std.debug.print("error: failed to initialize lua\n", .{});

        std.process.exit(1);

    }

    defer lua.deinit();

    _ = std.fs.cwd().statFile(config_path) catch |err| {

        std.debug.print("error: config file not found: {s}\n", .{config_path});

        std.debug.print("  {}\n", .{err});

        std.process.exit(1);

    };

    if (lua.load_file(config_path)) {

        std.debug.print("✓ config valid: {s}\n", .{config_path});

        std.process.exit(0);

    } else {

        std.debug.print("✗ config validation failed\n", .{});

        std.process.exit(1);

    }

}

pub fn main() !void {

    const allocator = gpa.allocator();

    defer _ = gpa.deinit();

    const default_config_path = try get_config_path(allocator);

    defer allocator.free(default_config_path);

    var config_path: []const u8 = default_config_path;

    var validate_mode: bool = false;

    var args = std.process.args();

    _ = args.skip();

    while (args.next()) |arg| {

        if (std.mem.eql(u8, arg, "-c") or std.mem.eql(u8, arg, "--config")) {

            if (args.next()) |path| config_path = path;

        } else if (std.mem.eql(u8, arg, "-h") or std.mem.eql(u8, arg, "--help")) {

            print_help();

            return;

        } else if (std.mem.eql(u8, arg, "-v") or std.mem.eql(u8, arg, "--version")) {

            std.debug.print("{s}\n", .{VERSION});

            return;

        } else if (std.mem.eql(u8, arg, "--init")) {

            init_config(allocator);

            return;

        } else if (std.mem.eql(u8, arg, "--validate")) {

            validate_mode = true;

        }

    }

    if (validate_mode) {

        try validate_config(allocator, config_path);

        return;

    }

    std.debug.print("oxwm starting\n", .{});

    config = config_mod.Config.init(allocator);

    defer config.deinit();

    config_mod.set_config(&config);

    if (lua.init(&config)) {

        const loaded = if (std.fs.cwd().statFile(config_path)) |_|

            lua.load_file(config_path)

        else |_| blk: {

            init_config(allocator);

            break :blk lua.load_config();

        };

        if (loaded) {

            config_path_global = config_path;

            std.debug.print("loaded config from {s}\n", .{config_path});

            apply_config_values();

        } else {

            std.debug.print("no config found, using defaults\n", .{});

            initialize_default_config();

        }

    } else {

        std.debug.print("failed to init lua, using defaults\n", .{});

        initialize_default_config();

    }

    var display = Display.open() catch |err| {

        std.debug.print("failed to open display: {}\n", .{err});

        return;

    };

    defer display.close();

    display_global = &display;

    std.debug.print("display opened: screen={d} root=0x{x}\n", .{ display.screen, display.root });

    std.debug.print("screen size: {d}x{d}\n", .{ display.screen_width(), display.screen_height() });

    display.become_window_manager() catch |err| {

        std.debug.print("failed to become window manager: {}\n", .{err});

        return;

    };

    std.debug.print("successfully became window manager\n", .{});

    setup_atoms(&display);

    setup_cursors(&display);

    client_mod.init(allocator);

    monitor_mod.init(allocator);

    monitor_mod.set_root_window(display.root, display.handle);

    tiling.set_display(display.handle);

    tiling.set_screen_size(display.screen_width(), display.screen_height());

    setup_monitors(&display);

    setup_bars(allocator, &display);

    setup_overlay(allocator, &display);

    grab_keybinds(&display);

    scan_existing_windows(&display);

    try run_autostart_commands(allocator, config.autostart.items);

    std.debug.print("entering event loop\n", .{});

    run_event_loop(&display);

    bar_mod.destroy_bars(allocator, display.handle);

    var mon = monitor_mod.monitors;

    while (mon) |m| {

        const next = m.next;

        monitor_mod.destroy(m);

        mon = next;

    }

    if (keybind_overlay) |overlay| {

        overlay.deinit(allocator);

    }

    lua.deinit();

    std.debug.print("oxwm exiting\n", .{});

}

fn setup_atoms(display: *Display) void {

    wm_protocols = xlib.XInternAtom(display.handle, "WM_PROTOCOLS", xlib.False);

    wm_delete = xlib.XInternAtom(display.handle, "WM_DELETE_WINDOW", xlib.False);

    wm_state = xlib.XInternAtom(display.handle, "WM_STATE", xlib.False);

    wm_take_focus = xlib.XInternAtom(display.handle, "WM_TAKE_FOCUS", xlib.False);

    net_active_window = xlib.XInternAtom(display.handle, "_NET_ACTIVE_WINDOW", xlib.False);

    net_supported = xlib.XInternAtom(display.handle, "_NET_SUPPORTED", xlib.False);

    net_wm_name = xlib.XInternAtom(display.handle, "_NET_WM_NAME", xlib.False);

    net_wm_state = xlib.XInternAtom(display.handle, "_NET_WM_STATE", xlib.False);

    net_wm_check = xlib.XInternAtom(display.handle, "_NET_SUPPORTING_WM_CHECK", xlib.False);

    net_wm_state_fullscreen = xlib.XInternAtom(display.handle, "_NET_WM_STATE_FULLSCREEN", xlib.False);

    net_wm_window_type = xlib.XInternAtom(display.handle, "_NET_WM_WINDOW_TYPE", xlib.False);

    net_wm_window_type_dialog = xlib.XInternAtom(display.handle, "_NET_WM_WINDOW_TYPE_DIALOG", xlib.False);

    net_client_list = xlib.XInternAtom(display.handle, "_NET_CLIENT_LIST", xlib.False);

    const utf8_string = xlib.XInternAtom(display.handle, "UTF8_STRING", xlib.False);

    wm_check_window = xlib.XCreateSimpleWindow(display.handle, display.root, 0, 0, 1, 1, 0, 0, 0);

    _ = xlib.XChangeProperty(display.handle, wm_check_window, net_wm_check, xlib.XA_WINDOW, 32, xlib.PropModeReplace, @ptrCast(&wm_check_window), 1);

    _ = xlib.XChangeProperty(display.handle, wm_check_window, net_wm_name, utf8_string, 8, xlib.PropModeReplace, "oxwm", 6);

    _ = xlib.XChangeProperty(display.handle, display.root, net_wm_check, xlib.XA_WINDOW, 32, xlib.PropModeReplace, @ptrCast(&wm_check_window), 1);

    var net_atoms = [_]xlib.Atom{ net_supported, net_wm_name, net_wm_state, net_wm_check, net_wm_state_fullscreen, net_active_window, net_wm_window_type, net_wm_window_type_dialog, net_client_list };

    _ = xlib.XChangeProperty(display.handle, display.root, net_supported, xlib.XA_ATOM, 32, xlib.PropModeReplace, @ptrCast(&net_atoms), net_atoms.len);

    _ = xlib.XDeleteProperty(display.handle, display.root, net_client_list);

    std.debug.print("atoms initialized with EWMH support\n", .{});

}

fn setup_cursors(display: *Display) void {

    cursor_normal = xlib.XCreateFontCursor(display.handle, xlib.XC_left_ptr);

    cursor_resize = xlib.XCreateFontCursor(display.handle, xlib.XC_sizing);

    cursor_move = xlib.XCreateFontCursor(display.handle, xlib.XC_fleur);

    _ = xlib.XDefineCursor(display.handle, display.root, cursor_normal);

}

fn setup_bars(allocator: std.mem.Allocator, display: *Display) void {

    var current_monitor = monitor_mod.monitors;

    var last_bar: ?*bar_mod.Bar = null;

    while (current_monitor) |monitor| {

        const bar = bar_mod.Bar.create(allocator, display.handle, display.screen, monitor, config.font);

        if (bar) |created_bar| {

            if (tiling.bar_height == 0) {

                tiling.set_bar_height(created_bar.height);

            }

            if (config.blocks.items.len > 0) {

                for (config.blocks.items) |cfg_block| {

                    const block = config_block_to_bar_block(cfg_block);

                    created_bar.add_block(block);

                }

            } else {

                created_bar.add_block(blocks_mod.Block.init_ram("", 5, 0x7aa2f7, true));

                created_bar.add_block(blocks_mod.Block.init_static(" | ", 0x666666, false));

                created_bar.add_block(blocks_mod.Block.init_datetime("", "%H:%M", 1, 0x0db9d7, true));

            }

            if (last_bar) |prev| {

                prev.next = created_bar;

            } else {

                bar_mod.bars = created_bar;

            }

            last_bar = created_bar;

            std.debug.print("bar created for monitor {d}\n", .{monitor.num});

        }

        current_monitor = monitor.next;

    }

}

fn setup_overlay(allocator: std.mem.Allocator, display: *Display) void {

    keybind_overlay = overlay_mod.Keybind_Overlay.init(display.handle, display.screen, display.root, config.font, allocator);

}

fn config_block_to_bar_block(cfg: config_mod.Block) blocks_mod.Block {

    return switch (cfg.block_type) {

        .static => blocks_mod.Block.init_static(cfg.format, cfg.color, cfg.underline),

        .datetime => blocks_mod.Block.init_datetime(cfg.format, cfg.datetime_format orelse "%H:%M", cfg.interval, cfg.color, cfg.underline),

        .ram => blocks_mod.Block.init_ram(cfg.format, cfg.interval, cfg.color, cfg.underline),

        .shell => blocks_mod.Block.init_shell(cfg.format, cfg.command orelse "", cfg.interval, cfg.color, cfg.underline),

        .battery => blocks_mod.Block.init_battery(

            cfg.format_charging orelse "",

            cfg.format_discharging orelse "",

            cfg.format_full orelse "",

            cfg.battery_name orelse "BAT0",

            cfg.interval,

            cfg.color,

            cfg.underline,

        ),

        .cpu_temp => blocks_mod.Block.init_cpu_temp(

            cfg.format,

            cfg.thermal_zone orelse "thermal_zone0",

            cfg.interval,

            cfg.color,

            cfg.underline,

        ),

    };

}

fn setup_monitors(display: *Display) void {

    std.debug.print("checking xinerama...\n", .{});

    if (xlib.XineramaIsActive(display.handle) != 0) {

        std.debug.print("xinerama is active!\n", .{});

        var screen_count: c_int = 0;

        const screens = xlib.XineramaQueryScreens(display.handle, &screen_count);

        if (screen_count > 0 and screens != null) {

            var prev_monitor: ?*Monitor = null;

            var index: usize = 0;

            while (index < @as(usize, @intCast(screen_count))) : (index += 1) {

                const screen = screens[index];

                const mon = monitor_mod.create() orelse continue;

                mon.num = @intCast(index);

                mon.mon_x = screen.x_org;

                mon.mon_y = screen.y_org;

                mon.mon_w = screen.width;

                mon.mon_h = screen.height;

                mon.win_x = screen.x_org;

                mon.win_y = screen.y_org;

                mon.win_w = screen.width;

                mon.win_h = screen.height;

                mon.lt[0] = &tiling.layout;

                mon.lt[1] = &monocle.layout;

                mon.lt[2] = &floating.layout;

                mon.lt[3] = &scrolling.layout;

                mon.lt[4] = &grid.layout;

                for (0..10) |i| {

                    mon.pertag.ltidxs[i][0] = mon.lt[0];

                    mon.pertag.ltidxs[i][1] = mon.lt[1];

                    mon.pertag.ltidxs[i][2] = mon.lt[2];

                    mon.pertag.ltidxs[i][3] = mon.lt[3];

                    mon.pertag.ltidxs[i][4] = mon.lt[4];

                }

                if (prev_monitor) |prev| {

                    prev.next = mon;

                } else {

                    monitor_mod.monitors = mon;

                }

                prev_monitor = mon;

                std.debug.print("monitor {d}: {d}x{d} at ({d},{d})\n", .{ index, mon.mon_w, mon.mon_h, mon.mon_x, mon.mon_y });

            }

            monitor_mod.selected_monitor = monitor_mod.monitors;

            _ = xlib.XFree(@ptrCast(screens));

            return;

        }

    } else {

        std.debug.print("xinerama not active, using single monitor\n", .{});

    }

    const mon = monitor_mod.create() orelse return;

    mon.mon_x = 0;

    mon.mon_y = 0;

    mon.mon_w = display.screen_width();

    mon.mon_h = display.screen_height();

    mon.win_x = 0;

    mon.win_y = 0;

    mon.win_w = display.screen_width();

    mon.win_h = display.screen_height();

    mon.lt[0] = &tiling.layout;

    mon.lt[1] = &monocle.layout;

    mon.lt[2] = &floating.layout;

    mon.lt[3] = &scrolling.layout;

    mon.lt[4] = &grid.layout;

    for (0..10) |i| {

        mon.pertag.ltidxs[i][0] = mon.lt[0];

        mon.pertag.ltidxs[i][1] = mon.lt[1];

        mon.pertag.ltidxs[i][2] = mon.lt[2];

        mon.pertag.ltidxs[i][3] = mon.lt[3];

        mon.pertag.ltidxs[i][4] = mon.lt[4];

    }

    monitor_mod.monitors = mon;

    monitor_mod.selected_monitor = mon;

    std.debug.print("monitor created: {d}x{d}\n", .{ mon.mon_w, mon.mon_h });

}

fn apply_config_values() void {

    border_color_focused = config.border_focused;

    border_color_unfocused = config.border_unfocused;

    border_width = config.border_width;

    gap_inner_h = config.gap_inner_h;

    gap_inner_v = config.gap_inner_v;

    gap_outer_h = config.gap_outer_h;

    gap_outer_v = config.gap_outer_v;

    tags = config.tags;

}

fn make_keybind(mod: u32, key: u64, action: config_mod.Action) config_mod.Keybind {

    var kb: config_mod.Keybind = .{ .action = action };

    kb.keys[0] = .{ .mod_mask = mod, .keysym = key };

    kb.key_count = 1;

    return kb;

}

fn make_keybind_int(mod: u32, key: u64, action: config_mod.Action, int_arg: i32) config_mod.Keybind {

    var kb = make_keybind(mod, key, action);

    kb.int_arg = int_arg;

    return kb;

}

fn make_keybind_str(mod: u32, key: u64, action: config_mod.Action, str_arg: []const u8) config_mod.Keybind {

    var kb = make_keybind(mod, key, action);

    kb.str_arg = str_arg;

    return kb;

}

fn initialize_default_config() void {

    const mod_key: u32 = 1 << 6;

    const shift_key: u32 = 1 << 0;

    const control_key: u32 = 1 << 2;

    config.add_keybind(make_keybind(mod_key, 0xff0d, .spawn_terminal)) catch {};

    config.add_keybind(make_keybind_str(mod_key, 'd', .spawn, "rofi -show drun")) catch {};

    config.add_keybind(make_keybind_str(mod_key, 's', .spawn, "maim -s | xclip -selection clipboard -t image/png")) catch {};

    config.add_keybind(make_keybind(mod_key, 'q', .kill_client)) catch {};

    config.add_keybind(make_keybind(mod_key | shift_key, 'q', .quit)) catch {};

    config.add_keybind(make_keybind(mod_key | shift_key, 'r', .reload_config)) catch {};

    config.add_keybind(make_keybind(mod_key, 'j', .focus_next)) catch {};

    config.add_keybind(make_keybind(mod_key, 'k', .focus_prev)) catch {};

    config.add_keybind(make_keybind(mod_key | shift_key, 'j', .move_next)) catch {};

    config.add_keybind(make_keybind(mod_key | shift_key, 'k', .move_prev)) catch {};

    config.add_keybind(make_keybind_int(mod_key, 'h', .resize_master, -50)) catch {};

    config.add_keybind(make_keybind_int(mod_key, 'l', .resize_master, 50)) catch {};

    config.add_keybind(make_keybind(mod_key, 'i', .inc_master)) catch {};

    config.add_keybind(make_keybind(mod_key, 'p', .dec_master)) catch {};

    config.add_keybind(make_keybind(mod_key, 'a', .toggle_gaps)) catch {};

    config.add_keybind(make_keybind(mod_key, 'f', .toggle_fullscreen)) catch {};

    config.add_keybind(make_keybind(mod_key, 0x0020, .toggle_floating)) catch {};

    config.add_keybind(make_keybind(mod_key, 'n', .cycle_layout)) catch {};

    config.add_keybind(make_keybind_int(mod_key, 0x002c, .focus_monitor, -1)) catch {};

    config.add_keybind(make_keybind_int(mod_key, 0x002e, .focus_monitor, 1)) catch {};

    config.add_keybind(make_keybind_int(mod_key | shift_key, 0x002c, .send_to_monitor, -1)) catch {};

    config.add_keybind(make_keybind_int(mod_key | shift_key, 0x002e, .send_to_monitor, 1)) catch {};

    var tag_index: i32 = 0;

    while (tag_index < 9) : (tag_index += 1) {

        const keysym: u64 = @as(u64, '1') + @as(u64, @intCast(tag_index));

        config.add_keybind(make_keybind_int(mod_key, keysym, .view_tag, tag_index)) catch {};

        config.add_keybind(make_keybind_int(mod_key | shift_key, keysym, .move_to_tag, tag_index)) catch {};

        config.add_keybind(make_keybind_int(mod_key | control_key, keysym, .toggle_view_tag, tag_index)) catch {};

        config.add_keybind(make_keybind_int(mod_key | control_key | shift_key, keysym, .toggle_tag, tag_index)) catch {};

    }

    config.add_button(.{ .click = .client_win, .mod_mask = mod_key, .button = 1, .action = .move_mouse }) catch {};

    config.add_button(.{ .click = .client_win, .mod_mask = mod_key, .button = 3, .action = .resize_mouse }) catch {};

}

fn grab_keybinds(display: *Display) void {

    update_numlock_mask(display);

    const modifiers = [_]c_uint{ 0, xlib.LockMask, numlock_mask, numlock_mask | xlib.LockMask };

    _ = xlib.XUngrabKey(display.handle, xlib.AnyKey, xlib.AnyModifier, display.root);

    for (config.keybinds.items) |keybind| {

        if (keybind.key_count == 0) continue;

        const first_key = keybind.keys[0];

        const keycode = xlib.XKeysymToKeycode(display.handle, @intCast(first_key.keysym));

        if (keycode != 0) {

            for (modifiers) |modifier| {

                _ = xlib.XGrabKey(

                    display.handle,

                    keycode,

                    first_key.mod_mask | modifier,

                    display.root,

                    xlib.True,

                    xlib.GrabModeAsync,

                    xlib.GrabModeAsync,

                );

            }

        }

    }

    for (config.buttons.items) |button| {

        if (button.click == .client_win) {

            for (modifiers) |modifier| {

                _ = xlib.XGrabButton(

                    display.handle,

                    @intCast(button.button),

                    button.mod_mask | modifier,

                    display.root,

                    xlib.True,

                    xlib.ButtonPressMask | xlib.ButtonReleaseMask | xlib.PointerMotionMask,

                    xlib.GrabModeAsync,

                    xlib.GrabModeAsync,

                    xlib.None,

                    xlib.None,

                );

            }

        }

    }

    std.debug.print("grabbed {d} keybinds from config\n", .{config.keybinds.items.len});

}

fn get_state(display: *Display, window: xlib.Window) c_long {

    var actual_type: xlib.Atom = 0;

    var actual_format: c_int = 0;

    var num_items: c_ulong = 0;

    var bytes_after: c_ulong = 0;

    var prop: [*c]u8 = null;

    const result = xlib.XGetWindowProperty(

        display.handle,

        window,

        wm_state,

        0,

        2,

        xlib.False,

        wm_state,

        &actual_type,

        &actual_format,

        &num_items,

        &bytes_after,

        &prop,

    );

    if (result != 0 or actual_type != wm_state or num_items < 1) {

        if (prop != null) {

            _ = xlib.XFree(prop);

        }

        return WithdrawnState;

    }

    const state: c_long = @as(*c_long, @ptrCast(@alignCast(prop))).*;

    _ = xlib.XFree(prop);

    return state;

}

fn scan_existing_windows(display: *Display) void {

    var root_return: xlib.Window = undefined;

    var parent_return: xlib.Window = undefined;

    var children: [*c]xlib.Window = undefined;

    var num_children: c_uint = undefined;

    if (xlib.XQueryTree(display.handle, display.root, &root_return, &parent_return, &children, &num_children) == 0) {

        return;

    }

    var index: c_uint = 0;

    while (index < num_children) : (index += 1) {

        var window_attrs: xlib.XWindowAttributes = undefined;

        if (xlib.XGetWindowAttributes(display.handle, children[index], &window_attrs) == 0) {

            continue;

        }

        if (window_attrs.override_redirect != 0) {

            continue;

        }

        var trans: xlib.Window = 0;

        if (xlib.XGetTransientForHint(display.handle, children[index], &trans) != 0) {

            continue;

        }

        if (window_attrs.map_state == IsViewable or get_state(display, children[index]) == IconicState) {

            manage(display, children[index], &window_attrs);

        }

    }

    index = 0;

    while (index < num_children) : (index += 1) {

        var window_attrs: xlib.XWindowAttributes = undefined;

        if (xlib.XGetWindowAttributes(display.handle, children[index], &window_attrs) == 0) {

            continue;

        }

        var trans: xlib.Window = 0;

        if (xlib.XGetTransientForHint(display.handle, children[index], &trans) != 0) {

            if (window_attrs.map_state == IsViewable or get_state(display, children[index]) == IconicState) {

                manage(display, children[index], &window_attrs);

            }

        }

    }

    if (children != null) {

        _ = xlib.XFree(@ptrCast(children));

    }

}

fn run_event_loop(display: *Display) void {

    const x11_fd = xlib.XConnectionNumber(display.handle);

    var fds = [_]std.posix.pollfd{

        .{ .fd = x11_fd, .events = std.posix.POLL.IN, .revents = 0 },

    };

    _ = xlib.XSync(display.handle, xlib.False);

    while (running) {

        while (xlib.XPending(display.handle) > 0) {

            var event = display.next_event();

            handle_event(display, &event);

        }

        tick_animations();

        var current_bar = bar_mod.bars;

        while (current_bar) |bar| {

            bar.update_blocks();

            bar.draw(display.handle, &tags);

            current_bar = bar.next;

        }

        const poll_timeout: i32 = if (scroll_animation.is_active()) 16 else 1000;

        _ = std.posix.poll(&fds, poll_timeout) catch 0;

    }

}

fn handle_event(display: *Display, event: *xlib.XEvent) void {

    const event_type = events.get_event_type(event);

    if (event_type == .button_press) {

        std.debug.print("EVENT: button_press received type={d}\n", .{event.type});

    }

    switch (event_type) {

        .map_request => handle_map_request(display, &event.xmaprequest),

        .configure_request => handle_configure_request(display, &event.xconfigurerequest),

        .key_press => handle_key_press(display, &event.xkey),

        .destroy_notify => handle_destroy_notify(display, &event.xdestroywindow),

        .unmap_notify => handle_unmap_notify(display, &event.xunmap),

        .enter_notify => handle_enter_notify(display, &event.xcrossing),

        .focus_in => handle_focus_in(display, &event.xfocus),

        .motion_notify => handle_motion_notify(display, &event.xmotion),

        .client_message => handle_client_message(display, &event.xclient),

        .button_press => handle_button_press(display, &event.xbutton),

        .expose => handle_expose(display, &event.xexpose),

        .property_notify => handle_property_notify(display, &event.xproperty),

        else => {},

    }

}

fn handle_map_request(display: *Display, event: *xlib.XMapRequestEvent) void {

    std.debug.print("map_request: window=0x{x}\n", .{event.window});

    var window_attributes: xlib.XWindowAttributes = undefined;

    if (xlib.XGetWindowAttributes(display.handle, event.window, &window_attributes) == 0) {

        return;

    }

    if (window_attributes.override_redirect != 0) {

        return;

    }

    if (client_mod.window_to_client(event.window) != null) {

        return;

    }

    manage(display, event.window, &window_attributes);

}

fn manage(display: *Display, win: xlib.Window, window_attrs: *xlib.XWindowAttributes) void {

    const client = client_mod.create(win) orelse return;

    var trans: xlib.Window = 0;

    client.x = window_attrs.x;

    client.y = window_attrs.y;

    client.width = window_attrs.width;

    client.height = window_attrs.height;

    client.old_x = window_attrs.x;

    client.old_y = window_attrs.y;

    client.old_width = window_attrs.width;

    client.old_height = window_attrs.height;

    client.old_border_width = window_attrs.border_width;

    client.border_width = border_width;

    update_title(display, client);

    if (xlib.XGetTransientForHint(display.handle, win, &trans) != 0) {

        if (client_mod.window_to_client(trans)) |transient_client| {

            client.monitor = transient_client.monitor;

            client.tags = transient_client.tags;

        }

    }

    if (client.monitor == null) {

        client.monitor = monitor_mod.selected_monitor;

        apply_rules(display, client);

    }

    const monitor = client.monitor orelse return;

    if (client.x + client.width > monitor.win_x + monitor.win_w) {

        client.x = monitor.win_x + monitor.win_w - client.width - 2 * client.border_width;

    }

    if (client.y + client.height > monitor.win_y + monitor.win_h) {

        client.y = monitor.win_y + monitor.win_h - client.height - 2 * client.border_width;

    }

    client.x = @max(client.x, monitor.win_x);

    client.y = @max(client.y, monitor.win_y);

    _ = xlib.XSetWindowBorderWidth(display.handle, win, @intCast(client.border_width));

    _ = xlib.XSetWindowBorder(display.handle, win, border_color_unfocused);

    tiling.send_configure(client);

    update_window_type(display, client);

    update_size_hints(display, client);

    update_wm_hints(display, client);

    _ = xlib.XSelectInput(

        display.handle,

        win,

        xlib.EnterWindowMask | xlib.FocusChangeMask | xlib.PropertyChangeMask | xlib.StructureNotifyMask,

    );

    grabbuttons(display, client, false);

    if (!client.is_floating) {

        client.is_floating = trans != 0 or client.is_fixed;

        client.old_state = client.is_floating;

    }

    if (client.is_floating) {

        _ = xlib.XRaiseWindow(display.handle, client.window);

    }

    client_mod.attach_aside(client);

    client_mod.attach_stack(client);

    _ = xlib.XChangeProperty(display.handle, display.root, net_client_list, xlib.XA_WINDOW, 32, xlib.PropModeAppend, @ptrCast(&client.window), 1);

    _ = xlib.XMoveResizeWindow(display.handle, client.window, client.x + 2 * display.screen_width(), client.y, @intCast(client.width), @intCast(client.height));

    set_client_state(display, client, NormalState);

    if (client.monitor == monitor_mod.selected_monitor) {

        const selmon = monitor_mod.selected_monitor orelse return;

        unfocus_client(display, selmon.sel, false);

    }

    monitor.sel = client;

    if (is_scrolling_layout(monitor)) {

        monitor.scroll_offset = 0;

    }

    arrange(monitor);

    _ = xlib.XMapWindow(display.handle, win);

    focus(display, null);

}

fn handle_configure_request(display: *Display, event: *xlib.XConfigureRequestEvent) void {

    const client = client_mod.window_to_client(event.window);

    if (client) |managed_client| {

        if ((event.value_mask & xlib.c.CWBorderWidth) != 0) {

            managed_client.border_width = event.border_width;

        } else if (managed_client.is_floating or (managed_client.monitor != null and managed_client.monitor.?.lt[managed_client.monitor.?.sel_lt] == null)) {

            const monitor = managed_client.monitor orelse return;

            if ((event.value_mask & xlib.c.CWX) != 0) {

                managed_client.old_x = managed_client.x;

                managed_client.x = monitor.mon_x + event.x;

            }

            if ((event.value_mask & xlib.c.CWY) != 0) {

                managed_client.old_y = managed_client.y;

                managed_client.y = monitor.mon_y + event.y;

            }

            if ((event.value_mask & xlib.c.CWWidth) != 0) {

                managed_client.old_width = managed_client.width;

                managed_client.width = event.width;

            }

            if ((event.value_mask & xlib.c.CWHeight) != 0) {

                managed_client.old_height = managed_client.height;

                managed_client.height = event.height;

            }

            const client_full_width = managed_client.width + managed_client.border_width * 2;

            const client_full_height = managed_client.height + managed_client.border_width * 2;

            if ((managed_client.x + managed_client.width) > monitor.mon_x + monitor.mon_w and managed_client.is_floating) {

                managed_client.x = monitor.mon_x + @divTrunc(monitor.mon_w, 2) - @divTrunc(client_full_width, 2);

            }

            if ((managed_client.y + managed_client.height) > monitor.mon_y + monitor.mon_h and managed_client.is_floating) {

                managed_client.y = monitor.mon_y + @divTrunc(monitor.mon_h, 2) - @divTrunc(client_full_height, 2);

            }

            if (((event.value_mask & (xlib.c.CWX | xlib.c.CWY)) != 0) and ((event.value_mask & (xlib.c.CWWidth | xlib.c.CWHeight)) == 0)) {

                tiling.send_configure(managed_client);

            }

            if (client_mod.is_visible(managed_client)) {

                _ = xlib.XMoveResizeWindow(display.handle, managed_client.window, managed_client.x, managed_client.y, @intCast(managed_client.width), @intCast(managed_client.height));

            }

        } else {

            tiling.send_configure(managed_client);

        }

    } else {

        var changes: xlib.XWindowChanges = undefined;

        changes.x = event.x;

        changes.y = event.y;

        changes.width = event.width;

        changes.height = event.height;

        changes.border_width = event.border_width;

        changes.sibling = event.above;

        changes.stack_mode = event.detail;

        _ = xlib.XConfigureWindow(display.handle, event.window, @intCast(event.value_mask), &changes);

    }

    _ = xlib.XSync(display.handle, xlib.False);

}

fn reset_chord_state() void {

    chord_index = 0;

    chord_keys = [_]config_mod.Key_Press{.{}} ** 4;

    chord_timestamp = 0;

    if (keyboard_grabbed) {

        if (display_global) |dsp| {

            _ = xlib.XUngrabKeyboard(dsp.handle, xlib.CurrentTime);

        }

        keyboard_grabbed = false;

    }

}

fn handle_key_press(display: *Display, event: *xlib.XKeyEvent) void {

    const keysym = xlib.XKeycodeToKeysym(display.handle, @intCast(event.keycode), 0);

    if (keybind_overlay) |overlay| {

        if (overlay.handle_key(keysym)) {

            return;

        }

    }

    const clean_state = event.state & ~@as(c_uint, xlib.LockMask | xlib.Mod2Mask);

    const current_time = std.time.milliTimestamp();

    if (chord_index > 0 and (current_time - chord_timestamp) > chord_timeout_ms) {

        reset_chord_state();

    }

    chord_keys[chord_index] = .{ .mod_mask = clean_state, .keysym = keysym };

    chord_index += 1;

    chord_timestamp = current_time;

    for (config.keybinds.items) |keybind| {

        if (keybind.key_count == 0) continue;

        if (keybind.key_count == chord_index) {

            var matches = true;

            var i: u8 = 0;

            while (i < keybind.key_count) : (i += 1) {

                if (chord_keys[i].keysym != keybind.keys[i].keysym or

                    chord_keys[i].mod_mask != keybind.keys[i].mod_mask)

                {

                    matches = false;

                    break;

                }

            }

            if (matches) {

                execute_action(display, keybind.action, keybind.int_arg, keybind.str_arg);

                reset_chord_state();

                return;

            }

        }

    }

    var has_partial_match = false;

    for (config.keybinds.items) |keybind| {

        if (keybind.key_count > chord_index) {

            var matches = true;

            var i: u8 = 0;

            while (i < chord_index) : (i += 1) {

                if (chord_keys[i].keysym != keybind.keys[i].keysym or

                    chord_keys[i].mod_mask != keybind.keys[i].mod_mask)

                {

                    matches = false;

                    break;

                }

            }

            if (matches) {

                has_partial_match = true;

                break;

            }

        }

    }

    if (has_partial_match and !keyboard_grabbed) {

        const grab_result = xlib.XGrabKeyboard(

            display.handle,

            display.root,

            xlib.True,

            xlib.GrabModeAsync,

            xlib.GrabModeAsync,

            xlib.CurrentTime,

        );

        if (grab_result == xlib.GrabSuccess) {

            keyboard_grabbed = true;

        }

    } else if (!has_partial_match) {

        reset_chord_state();

    }

}

fn execute_action(display: *Display, action: config_mod.Action, int_arg: i32, str_arg: ?[]const u8) void {

    switch (action) {

        .spawn_terminal => spawn_terminal(),

        .spawn => {

            if (str_arg) |cmd| {

                spawn_command(cmd);

            }

        },

        .kill_client => kill_focused(display),

        .quit => {

            std.debug.print("quit keybind pressed\n", .{});

            running = false;

        },

        .reload_config => reload_config(display),

        .restart => reload_config(display),

        .show_keybinds => {

            if (keybind_overlay) |overlay| {

                const mon = monitor_mod.selected_monitor orelse monitor_mod.monitors;

                if (mon) |m| {

                    overlay.toggle(m.mon_x, m.mon_y, m.mon_w, m.mon_h);

                }

            }

        },

        .focus_next => focusstack(display, 1),

        .focus_prev => focusstack(display, -1),

        .move_next => movestack(display, 1),

        .move_prev => movestack(display, -1),

        .resize_master => setmfact(@as(f32, @floatFromInt(int_arg)) / 1000.0),

        .inc_master => incnmaster(1),

        .dec_master => incnmaster(-1),

        .toggle_floating => toggle_floating(display),

        .toggle_fullscreen => toggle_fullscreen(display),

        .toggle_gaps => toggle_gaps(),

        .cycle_layout => cycle_layout(),

        .set_layout => set_layout(str_arg),

        .set_layout_tiling => set_layout_index(0),

        .set_layout_floating => set_layout_index(2),

        .view_tag => {

            const tag_mask: u32 = @as(u32, 1) << @intCast(int_arg);

            view(display, tag_mask);

        },

        .view_next_tag => view_adjacent_tag(display, 1),

        .view_prev_tag => view_adjacent_tag(display, -1),

        .view_next_nonempty_tag => view_adjacent_nonempty_tag(display, 1),

        .view_prev_nonempty_tag => view_adjacent_nonempty_tag(display, -1),

        .move_to_tag => {

            const tag_mask: u32 = @as(u32, 1) << @intCast(int_arg);

            tag_client(display, tag_mask);

        },

        .toggle_view_tag => {

            const tag_mask: u32 = @as(u32, 1) << @intCast(int_arg);

            toggle_view(display, tag_mask);

        },

        .toggle_tag => {

            const tag_mask: u32 = @as(u32, 1) << @intCast(int_arg);

            toggle_client_tag(display, tag_mask);

        },

        .focus_monitor => focusmon(display, int_arg),

        .send_to_monitor => sendmon(display, int_arg),

        .scroll_left => {

            scroll_layout(-1);

        },

        .scroll_right => {

            scroll_layout(1);

        },

    }

}

fn reload_config(display: *Display) void {

    std.debug.print("reloading config...\n", .{});

    ungrab_keybinds(display);

    config.keybinds.clearRetainingCapacity();

    config.buttons.clearRetainingCapacity();

    config.rules.clearRetainingCapacity();

    config.blocks.clearRetainingCapacity();

    lua.deinit();

    _ = lua.init(&config);

    const loaded = if (config_path_global) |path|

        lua.load_file(path)

    else

        lua.load_config();

    if (loaded) {

        if (config_path_global) |path| {

            std.debug.print("reloaded config from {s}\n", .{path});

        } else {

            std.debug.print("reloaded config from ~/.config/oxwm/config.lua\n", .{});

        }

        apply_config_values();

    } else {

        std.debug.print("reload failed, restoring defaults\n", .{});

        initialize_default_config();

    }

    bar_mod.destroy_bars(gpa.allocator(), display.handle);

    setup_bars(gpa.allocator(), display);

    rebuild_bar_blocks();

    grab_keybinds(display);

}

fn rebuild_bar_blocks() void {

    var current_bar = bar_mod.bars;

    while (current_bar) |bar| {

        bar.clear_blocks();

        if (config.blocks.items.len > 0) {

            for (config.blocks.items) |cfg_block| {

                const block = config_block_to_bar_block(cfg_block);

                bar.add_block(block);

            }

        } else {

            bar.add_block(blocks_mod.Block.init_ram("", 5, 0x7aa2f7, true));

            bar.add_block(blocks_mod.Block.init_static(" | ", 0x666666, false));

            bar.add_block(blocks_mod.Block.init_datetime("", "%H:%M", 1, 0x0db9d7, true));

        }

        current_bar = bar.next;

    }

}

fn ungrab_keybinds(display: *Display) void {

    _ = xlib.XUngrabKey(display.handle, xlib.AnyKey, xlib.AnyModifier, display.root);

}

fn spawn_child_setup() void {

    _ = std.c.setsid();

    if (display_global) |display| {

        const display_fd = xlib.XConnectionNumber(display.handle);

        std.posix.close(@intCast(display_fd));

    }

    const sigchld_handler = std.posix.Sigaction{

        .handler = .{ .handler = std.posix.SIG.DFL },

        .mask = std.mem.zeroes(std.posix.sigset_t),

        .flags = 0,

    };

    std.posix.sigaction(std.posix.SIG.CHLD, &sigchld_handler, null);

}

fn spawn_command(cmd: []const u8) void {

    std.debug.print("running cmd: {s}\n", .{cmd});

    const pid = std.posix.fork() catch return;

    if (pid == 0) {

        spawn_child_setup();

        var cmd_buf: [1024]u8 = undefined;

        if (cmd.len >= cmd_buf.len) {

            std.posix.exit(1);

        }

        @memcpy(cmd_buf[0..cmd.len], cmd);

        cmd_buf[cmd.len] = 0;

        const argv = [_:null]?[*:0]const u8{ "sh", "-c", @ptrCast(&cmd_buf) };

        _ = std.posix.execvpeZ("sh", &argv, std.c.environ) catch {};

        std.posix.exit(1);

    }

}

fn spawn_terminal() void {

    const pid = std.posix.fork() catch return;

    if (pid == 0) {

        spawn_child_setup();

        var term_buf: [256]u8 = undefined;

        const terminal = config.terminal;

        if (terminal.len >= term_buf.len) {

            std.posix.exit(1);

        }

        @memcpy(term_buf[0..terminal.len], terminal);

        term_buf[terminal.len] = 0;

        const term_ptr: [*:0]const u8 = @ptrCast(&term_buf);

        const argv = [_:null]?[*:0]const u8{term_ptr};

        _ = std.posix.execvpeZ(term_ptr, &argv, std.c.environ) catch {};

        std.posix.exit(1);

    }

}

fn movestack(display: *Display, direction: i32) void {

    const monitor = monitor_mod.selected_monitor orelse return;

    const current = monitor.sel orelse return;

    if (current.is_floating) {

        return;

    }

    var target: ?*Client = null;

    if (direction > 0) {

        target = current.next;

        while (target) |client| {

            if (client_mod.is_visible(client) and !client.is_floating) {

                break;

            }

            target = client.next;

        }

        if (target == null) {

            target = monitor.clients;

            while (target) |client| {

                if (client == current) {

                    break;

                }

                if (client_mod.is_visible(client) and !client.is_floating) {

                    break;

                }

                target = client.next;

            }

        }

    } else {

        var prev: ?*Client = null;

        var iter = monitor.clients;

        while (iter) |client| {

            if (client == current) {

                break;

            }

            if (client_mod.is_visible(client) and !client.is_floating) {

                prev = client;

            }

            iter = client.next;

        }

        if (prev == null) {

            iter = current.next;

            while (iter) |client| {

                if (client_mod.is_visible(client) and !client.is_floating) {

                    prev = client;

                }

                iter = client.next;

            }

        }

        target = prev;

    }

    if (target) |swap_client| {

        if (swap_client != current) {

            client_mod.swap_clients(current, swap_client);

            arrange(monitor);

            focus(display, current);

        }

    }

}

fn toggle_view(display: *Display, tag_mask: u32) void {

    const monitor = monitor_mod.selected_monitor orelse return;

    const new_tags = monitor.tagset[monitor.sel_tags] ^ tag_mask;

    if (new_tags != 0) {

        monitor.tagset[monitor.sel_tags] = new_tags;

        if (new_tags == ~@as(u32, 0)) {

            monitor.pertag.prevtag = monitor.pertag.curtag;

            monitor.pertag.curtag = 0;

        }

        if ((new_tags & (@as(u32, 1) << @intCast(monitor.pertag.curtag -| 1))) == 0) {

            monitor.pertag.prevtag = monitor.pertag.curtag;

            var i: u32 = 0;

            while (i < 9) : (i += 1) {

                if ((new_tags & (@as(u32, 1) << @intCast(i))) != 0) break;

            }

            monitor.pertag.curtag = i + 1;

        }

        monitor.nmaster = monitor.pertag.nmasters[monitor.pertag.curtag];

        monitor.mfact = monitor.pertag.mfacts[monitor.pertag.curtag];

        monitor.sel_lt = monitor.pertag.sellts[monitor.pertag.curtag];

        focus_top_client(display, monitor);

        arrange(monitor);

        bar_mod.invalidate_bars();

    }

}

fn toggle_client_tag(display: *Display, tag_mask: u32) void {

    const monitor = monitor_mod.selected_monitor orelse return;

    const client = monitor.sel orelse return;

    const new_tags = client.tags ^ tag_mask;

    if (new_tags != 0) {

        client.tags = new_tags;

        focus_top_client(display, monitor);

        arrange(monitor);

        bar_mod.invalidate_bars();

    }

}

fn toggle_gaps() void {

    const monitor = monitor_mod.selected_monitor orelse return;

    if (monitor.gap_inner_h == 0) {

        monitor.gap_inner_h = gap_inner_v;

        monitor.gap_inner_v = gap_inner_v;

        monitor.gap_outer_h = gap_outer_h;

        monitor.gap_outer_v = gap_outer_v;

    } else {

        monitor.gap_inner_h = 0;

        monitor.gap_inner_v = 0;

        monitor.gap_outer_h = 0;

        monitor.gap_outer_v = 0;

    }

    arrange(monitor);

}

fn kill_focused(display: *Display) void {

    const selected = monitor_mod.selected_monitor orelse return;

    const client = selected.sel orelse return;

    std.debug.print("killing window: 0x{x}\n", .{client.window});

    if (!send_event(display, client, wm_delete)) {

        _ = xlib.XGrabServer(display.handle);

        _ = xlib.XKillClient(display.handle, client.window);

        _ = xlib.XSync(display.handle, xlib.False);

        _ = xlib.XUngrabServer(display.handle);

    }

}

fn toggle_fullscreen(display: *Display) void {

    const selected = monitor_mod.selected_monitor orelse return;

    const client = selected.sel orelse return;

    set_fullscreen(display, client, !client.is_fullscreen);

}

fn set_fullscreen(display: *Display, client: *Client, fullscreen: bool) void {

    const monitor = client.monitor orelse return;

    if (fullscreen and !client.is_fullscreen) {

        var fullscreen_atom = net_wm_state_fullscreen;

        _ = xlib.XChangeProperty(

            display.handle,

            client.window,

            net_wm_state,

            xlib.XA_ATOM,

            32,

            xlib.PropModeReplace,

            @ptrCast(&fullscreen_atom),

            1,

        );

        client.is_fullscreen = true;

        client.old_state = client.is_floating;

        client.old_border_width = client.border_width;

        client.border_width = 0;

        client.is_floating = true;

        _ = xlib.XSetWindowBorderWidth(display.handle, client.window, 0);

        tiling.resize_client(client, monitor.mon_x, monitor.mon_y, monitor.mon_w, monitor.mon_h);

        _ = xlib.XRaiseWindow(display.handle, client.window);

        std.debug.print("fullscreen enabled: window=0x{x}\n", .{client.window});

    } else if (!fullscreen and client.is_fullscreen) {

        var no_atom: xlib.Atom = 0;

        _ = xlib.XChangeProperty(

            display.handle,

            client.window,

            net_wm_state,

            xlib.XA_ATOM,

            32,

            xlib.PropModeReplace,

            @ptrCast(&no_atom),

            0,

        );

        client.is_fullscreen = false;

        client.is_floating = client.old_state;

        client.border_width = client.old_border_width;

        client.x = client.old_x;

        client.y = client.old_y;

        client.width = client.old_width;

        client.height = client.old_height;

        tiling.resize_client(client, client.x, client.y, client.width, client.height);

        arrange(monitor);

        std.debug.print("fullscreen disabled: window=0x{x}\n", .{client.window});

    }

}

fn view(display: *Display, tag_mask: u32) void {

    const monitor = monitor_mod.selected_monitor orelse return;

    if (tag_mask == monitor.tagset[monitor.sel_tags]) {

        return;

    }

    monitor.sel_tags ^= 1;