├── .gitignore ├── LICENSE ├── Makefile ├── README.md ├── go.mod ├── go.sum ├── hyprland ├── helpers.go └── wayland-hyprland.go ├── shift-shift.go ├── sway ├── connect.go ├── connect_test.go ├── helpers.go └── wayland-sway.go └── xkb └── xkb.go /.gitignore: -------------------------------------------------------------------------------- 1 | # Compiled Object files, Static and Dynamic libs (Shared Objects) 2 | *.o 3 | *.a 4 | *.so 5 | 6 | # Folders 7 | _obj 8 | _test 9 | 10 | # Architecture specific extensions/prefixes 11 | *.[568vq] 12 | [568vq].out 13 | 14 | *.cgo1.go 15 | *.cgo2.c 16 | _cgo_defun.c 17 | _cgo_gotypes.go 18 | _cgo_export.* 19 | 20 | _testmain.go 21 | 22 | *.exe 23 | 24 | /shift-shift 25 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | GNU GENERAL PUBLIC LICENSE 2 | Version 3, 29 June 2007 3 | 4 | Copyright (C) 2007 Free Software Foundation, Inc. 5 | Everyone is permitted to copy and distribute verbatim copies 6 | of this license document, but changing it is not allowed. 7 | 8 | Preamble 9 | 10 | The GNU General Public License is a free, copyleft license for 11 | software and other kinds of works. 12 | 13 | The licenses for most software and other practical works are designed 14 | to take away your freedom to share and change the works. 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Interpretation of Sections 15 and 16. 613 | 614 | If the disclaimer of warranty and limitation of liability provided 615 | above cannot be given local legal effect according to their terms, 616 | reviewing courts shall apply local law that most closely approximates 617 | an absolute waiver of all civil liability in connection with the 618 | Program, unless a warranty or assumption of liability accompanies a 619 | copy of the Program in return for a fee. 620 | 621 | END OF TERMS AND CONDITIONS 622 | 623 | How to Apply These Terms to Your New Programs 624 | 625 | If you develop a new program, and you want it to be of the greatest 626 | possible use to the public, the best way to achieve this is to make it 627 | free software which everyone can redistribute and change under these terms. 628 | 629 | To do so, attach the following notices to the program. It is safest 630 | to attach them to the start of each source file to most effectively 631 | state the exclusion of warranty; and each file should have at least 632 | the "copyright" line and a pointer to where the full notice is found. 633 | 634 | {one line to give the program's name and a brief idea of what it does.} 635 | Copyright (C) {year} {name of author} 636 | 637 | This program is free software: you can redistribute it and/or modify 638 | it under the terms of the GNU General Public License as published by 639 | the Free Software Foundation, either version 3 of the License, or 640 | (at your option) any later version. 641 | 642 | This program is distributed in the hope that it will be useful, 643 | but WITHOUT ANY WARRANTY; without even the implied warranty of 644 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 645 | GNU General Public License for more details. 646 | 647 | You should have received a copy of the GNU General Public License 648 | along with this program. If not, see . 649 | 650 | Also add information on how to contact you by electronic and paper mail. 651 | 652 | If the program does terminal interaction, make it output a short 653 | notice like this when it starts in an interactive mode: 654 | 655 | {project} Copyright (C) {year} {fullname} 656 | This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. 657 | This is free software, and you are welcome to redistribute it 658 | under certain conditions; type `show c' for details. 659 | 660 | The hypothetical commands `show w' and `show c' should show the appropriate 661 | parts of the General Public License. Of course, your program's commands 662 | might be different; for a GUI interface, you would use an "about box". 663 | 664 | You should also get your employer (if you work as a programmer) or school, 665 | if any, to sign a "copyright disclaimer" for the program, if necessary. 666 | For more information on this, and how to apply and follow the GNU GPL, see 667 | . 668 | 669 | The GNU General Public License does not permit incorporating your program 670 | into proprietary programs. If your program is a subroutine library, you 671 | may consider it more useful to permit linking proprietary applications with 672 | the library. If this is what you want to do, use the GNU Lesser General 673 | Public License instead of this License. But first, please read 674 | . 675 | -------------------------------------------------------------------------------- /Makefile: -------------------------------------------------------------------------------- 1 | .PHONY: build 2 | build: 3 | CGO_ENABLED=1 go build shift-shift.go 4 | 5 | .PHONY: lint 6 | lint: 7 | golangci-lint run ./... 8 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | ## What is it and why? 2 | 3 | *Do you want to use Shift/Ctrl/Alt as modifiers while also switching language 4 | layouts? This tool is for you then.* 5 | 6 | A language layout switcher for Xorg and Wayland (including Sway and Hyprland) 7 | that utilizes modifier keys (such as Shift and Control) as layout switchers. 8 | This setup enables the same key to function both as a modifier and a layout 9 | switcher without conflicts. 10 | 11 | The utility incorporates two key concepts: 12 | 13 | 1. Use a key as a modifier when held and as a layout switcher when tapped. 14 | 2. Cyclic switching with a single key is inefficient; dedicated keys for each 15 | language group are more effective. 16 | 17 | This approach may not be necessary when using multiple languages simultaneously, 18 | but it is beneficial for most cases involving 2-3 languages. Frequent keyboard 19 | layout switching, common among non-English speakers, is easier with dedicated 20 | keys than with key combinations. For example, old Soviet computers featured a 21 | dedicated RUS/LAT key to toggle between Latin and Cyrillic. Some computers even 22 | offered two separate keys: RUS and LAT! 23 | 24 | Unfortunately, modern English-oriented keyboards lack dedicated layout-switching 25 | keys. Modifier keys are typically used only in combination with other keys. This 26 | utility provides a solution: these keys can perform their original functions 27 | while also being used to switch layouts. 28 | 29 | By default, the Left Shift key switches to layout 1 and the Right Shift key to 30 | layout 2. You can customize this behavior using command-line options. The utility 31 | supports up to 4 groups. 32 | 33 | Additionally, you can treat any input device as a keyboard using the `-match` 34 | option, enabling simultaneous layout switching across multiple keyboards. The 35 | utility listens to all connected devices. 36 | 37 | The program listens to keypress events from the kernel (via evdev) and sends 38 | them to Xorg or your window manager. Different WMs have their own methods for 39 | keyboard switching, especially on Wayland. I have added support for Wayland 40 | window managers I have used extensively. See the examples for all variants. 41 | 42 | ## Install 43 | 44 | ### Go way 45 | 46 | This is a Go program. You need a Go environment to build it from source. 47 | 48 | go get github.com/grafov/shift-shift@latest 49 | 50 | `xlib-devel` lib should be installed. Check your distro. 51 | 52 | ### Get sources 53 | 54 | 1. Get repository and cd to it. 55 | 2. `make build` 56 | 57 | Prerequisites are the same: `xlib-devel` lib should be installed. Check your distro. 58 | 59 | ## Usage 60 | 61 | ``` 62 | $ Usage of ./shift-shift: 63 | -1 string 64 | key used for switching to 1st xkb group (default "LEFTSHIFT") 65 | -2 string 66 | key used for switching to 2nd xkb group (default "RIGHTSHIFT") 67 | -3 string 68 | key used for switching to 3rd xkb group 69 | -4 string 70 | key used for switching to 4th xkb group 71 | -double-keystroke 72 | require pressing the same key twice to switch the layout 73 | -double-keystroke-timeout int 74 | second keystroke timeout in milliseconds (default 500) 75 | -list 76 | list all devices that found by evdev (not only keyboards) 77 | -list-hypr 78 | list all keyboards recognized by Hyprland 79 | -list-sway 80 | list all devices recognized by Sway (not only keyboards) 81 | -match string 82 | regexp used to match input keyboard device as it listed by evdev (default "keyboard") 83 | -match-wm string 84 | optional regexp used to match device in WM, if not set evdev regexp used (default "keyboard") 85 | -print 86 | print pressed keys for debug (verbose output) 87 | -quiet 88 | be silent 89 | -scan-once 90 | scan for keyboards only at startup (less power consumption) 91 | -switcher string 92 | select method of switching (possible values are "auto", "xkb", "sway", "hypr") (default "auto") 93 | ``` 94 | 95 | ## Configuration 96 | 97 | ### 1. Match keyboard in evdev output 98 | First step is common for all environments. Just try to find your keyboard device. It may look like this: 99 | 100 | ``` 101 | $ shift-shift -list 102 | 103 | /dev/input/event3 PC Speaker 104 | /dev/input/event4 HDA ATI HDMI HDMI/DP,pcm=3 105 | /dev/input/event6 HDA ATI HDMI HDMI/DP,pcm=8 106 | /dev/input/event8 HD-Audio Generic Rear Mic 107 | /dev/input/event12 HD-Audio Generic Front Headphone 108 | /dev/input/event20 ZSA Technology Labs ErgoDox EZ System Control 109 | /dev/input/event21 ZSA Technology Labs ErgoDox EZ Consumer Control 110 | /dev/input/event23 VIRPIL Controls/20210102 R-VPC Stick MT-50 111 | /dev/input/event7 HDA ATI HDMI HDMI/DP,pcm=9 112 | /dev/input/event18 ZSA Technology Labs ErgoDox EZ 113 | /dev/input/event22 ZSA Technology Labs ErgoDox EZ Keyboard 114 | /dev/input/event24 ATMEL/VIRPIL/190930 BRD Rudder V3 115 | /dev/input/event5 HDA ATI HDMI HDMI/DP,pcm=7 116 | /dev/input/event17 Kensington Kensington Expert Mouse 117 | /dev/input/event19 ZSA Technology Labs ErgoDox EZ 118 | ... 119 | ``` 120 | 121 | And consists of any devices recognized by kernel on your machine. Just select any that looks like a keyboard :) 122 | 123 | **Note:** you need setup proper access for reading `/dev/input/*` 124 | devices. As a fallback try to run with `sudo` or similar tool. 125 | 126 | You should add it `-match` key. You are free to use regular expression or just a substring for matching. Check [The 127 | syntax of regexps](https://pkg.go.dev/regexp/syntax) for reference. 128 | 129 | ``` 130 | -match="^ZSA.*Keyboard$" 131 | ``` 132 | 133 | Hint. You could match several keyboards at once. They will used when connected: 134 | 135 | ``` 136 | $ shift-shift -match "Ergodox|Ergohaven" 137 | ``` 138 | 139 | Well, we've matched device with evdev. 140 | 141 | ### 2. Match switcher 142 | 143 | Next step is match it to a switcher. It 144 | depends of your environment, see variants below. 145 | 146 | #### 2.1 WM or DE under XOrg 147 | 148 | ``` 149 | $ shift-shift -match="^ZSA.*Keyboard$" -switcher=xkb 150 | ``` 151 | 152 | And it will run switcher especially for XOrg. 153 | 154 | #### 2.2 Sway WM 155 | 156 | In most of cases you should just add "-switcher=sway" to command line and it will works. 157 | 158 | ``` shell 159 | $ shift-shift -match="^ZSA.*Keyboard$" -switcher=sway 160 | ``` 161 | 162 | You could list keyboards as they seen by Sway: 163 | 164 | ``` shell 165 | $ shift-shift -list-sway 166 | 167 | { 168 | "identifier": "12951:18804:ZSA_Technology_Labs_ErgoDox_EZ_Keyboard", 169 | "name": "ZSA Technology Labs ErgoDox EZ Keyboard", 170 | "type": "keyboard", 171 | "repeat_delay": 350, 172 | "repeat_rate": 50, 173 | "xkb_layout_names": [ 174 | "English (US)", 175 | "Russian (typewriter)" 176 | ], 177 | "xkb_active_layout_index": 0, 178 | "xkb_active_layout_name": "English (US)", 179 | "libinput": { 180 | "send_events": "enabled" 181 | }, 182 | "vendor": 12951, 183 | "product": 18804 184 | }, 185 | { 186 | "identifier": "12951:18804:ZSA_Technology_Labs_ErgoDox_EZ_Consumer_Control", 187 | "name": "ZSA Technology Labs ErgoDox EZ Consumer Control", 188 | ... 189 | ``` 190 | 191 | It will display your list of devices (but not only keyboards). 192 | 193 | Sometimes Sway may name the keyboard differently. In such cases, you can match 194 | the keyboard using a regular expression similar to the evdev example above. 195 | Then, add the result to the "-match-wm" key: 196 | 197 | ``` 198 | $ shift-shift -match="^ZSA.*Keyboard$" -switcher=sway -match-wm="^ZSA.*Keyboard$" 199 | ``` 200 | 201 | When "-match-wm" omited its value set to value of "-match". 202 | 203 | #### 2.3 Hyprland WM 204 | 205 | In most of cases you should just add "-switcher=hypr" to command line and it will works. 206 | 207 | ``` shell 208 | $ shift-shift -match="(?i)ergodox" -switcher=hypr 209 | ``` 210 | 211 | You could list keyboards as they seen by Hyprland: 212 | 213 | ``` shell 214 | $ shift-shift -list-hypr 215 | 216 | model: name:zsa-technology-labs-ergodox-ez layout:us,ru options:caps:none,misc:typo,lv3:capslock_switch keymap:English (US) 217 | ``` 218 | 219 | Naming in Hyprland differs from evdev. You can match the keyboard using a 220 | regular expression, similar to evdev as described above. Then, add the result to 221 | the "-match-wm" key: 222 | 223 | ``` shell 224 | $ shift-shift -match="^ZSA.*Keyboard$" -switcher=hypr -match-wm="^zsa-technology-labs-ergodox-ez$" 225 | ``` 226 | 227 | When "-match-wm" omited its value set to value of "-match". 228 | 229 | #### 3. Print for detected keyboards 230 | 231 | For debugging you could run with "-print" option. For example the output for Hyprland config above: 232 | 233 | ``` 234 | 2025/01/30 01:12:28 use Hyprland switcher 235 | 2025/01/30 01:12:28 Hyprland keyboard matched zsa-technology-labs-ergodox-ez 236 | 2025/01/30 01:12:29 evdev keyboard found at /dev/input/event21: ZSA Technology Labs ErgoDox EZ Consumer Control 237 | 2025/01/30 01:12:29 evdev keyboard found at /dev/input/event22: ZSA Technology Labs ErgoDox EZ Keyboard 238 | 239 | ``` 240 | 241 | #### 4. Keys for switching 242 | 243 | By default, the left Shift key is used for layout 0, and the right Shift key for 244 | layout 1. You can use up to four layouts, naming them with the keys "-1" through 245 | "-4". In the example below, the Ctrls key is used: 246 | 247 | ``` shell 248 | $ shift-shift -match="^ZSA.*Keyboard$" -switcher=hypr -match-wm="^zsa-technology-labs-ergodox-ez$" -1 LEFT_CTRL -2 RIGHT_CTRL -print 249 | ``` 250 | 251 | The output with "-print" when you press any of switch keys: 252 | 253 | ``` 254 | 2025/01/30 01:12:29 ZSA Technology Labs ErgoDox EZ type:1 code:90 pressed 255 | 2025/01/30 01:12:29 ZSA Technology Labs ErgoDox EZ type:1 code:90 released 256 | 2025/01/30 01:12:29 ZSA Technology Labs ErgoDox EZ switches group to 1 257 | 2025/01/30 01:12:29 switch hyprland kbd "zsa-technology-labs-ergodox-ez" to group 0 258 | 2025/01/30 01:12:30 ZSA Technology Labs ErgoDox EZ type:1 code:91 pressed 259 | 2025/01/30 01:12:30 ZSA Technology Labs ErgoDox EZ type:1 code:91 released 260 | 2025/01/30 01:12:30 ZSA Technology Labs ErgoDox EZ switches group to 2 261 | ``` 262 | 263 | For reference full list of key names recognized by evdev: 264 | 265 | ``` shell 266 | $ cat /usr/include/linux/input-event-codes.h 267 | ``` 268 | 269 | #### 5. Final setup 270 | 271 | Just remove "-print" once everything is working. Then, add the final command to 272 | your window manager's autostart. 273 | 274 | $ shift-shift -match="^ZSA.*Keyboard$" -switcher=hypr -match-wm="^zsa-technology-labs-ergodox-ez$" -1 LEFT_CTRL -2 RIGHT_CTRL -print 275 | 276 | ## Thanks 277 | 278 | Thanks to people who contributed bugreports and improvements for 279 | `shift-shift`, especially to 280 | [@kovetsiy](https://github.com/kovetskiy), 281 | [@ArtemT](https://github.com/ArtemT), 282 | [@seletskiy](https://github.com/seletskiy). 283 | 284 | Idea of Sway integration was inspired by Python code of 285 | https://github.com/nmukhachev/sway-xkb-switcher project. 286 | -------------------------------------------------------------------------------- /go.mod: -------------------------------------------------------------------------------- 1 | module github.com/grafov/shift-shift 2 | 3 | go 1.21 4 | 5 | require github.com/grafov/evdev v1.0.0 6 | 7 | require github.com/thiagokokada/hyprland-go v0.4.0 8 | -------------------------------------------------------------------------------- /go.sum: -------------------------------------------------------------------------------- 1 | github.com/grafov/evdev v1.0.0 h1:/rsOssITVhM7GPMyvlT34kiAOnvYzKJnKvuOqaMYW7c= 2 | github.com/grafov/evdev v1.0.0/go.mod h1:dcJfZnwr3VySHuphTV+Q0JcbP3AWR9W4WqbLeA3bG6U= 3 | github.com/thiagokokada/hyprland-go v0.4.0 h1:SJQYVWYde240BjseQr7QRKRDCMdieKlaMO5RNWG2vh8= 4 | github.com/thiagokokada/hyprland-go v0.4.0/go.mod h1:gUGbdxhD7QdvPpdEwsB09x0HzICPkhKAuCeY+LVx5YM= 5 | -------------------------------------------------------------------------------- /hyprland/helpers.go: -------------------------------------------------------------------------------- 1 | package hyprland 2 | 3 | import ( 4 | "fmt" 5 | "os" 6 | "strings" 7 | 8 | "github.com/thiagokokada/hyprland-go" 9 | "github.com/thiagokokada/hyprland-go/helpers" 10 | ) 11 | 12 | type keyboard struct { 13 | Address string `json:"address"` 14 | Name string `json:"name"` 15 | Rules string `json:"rules"` 16 | Model string `json:"model"` 17 | Layout string `json:"layout"` 18 | Variant string `json:"variant"` 19 | Options string `json:"options"` 20 | ActiveKeymap string `json:"active_keymap"` 21 | Main bool `json:"main"` 22 | } 23 | 24 | func PrintDevices() ([]string, error) { 25 | s, err := helpers.GetSocket(helpers.RequestSocket) 26 | if err != nil { 27 | return nil, err 28 | } 29 | inputs, err := getDevices(hyprland.NewClient(s)) 30 | if err != nil { 31 | return nil, err 32 | } 33 | output := make([]string, len(inputs)) 34 | for i, inp := range inputs { 35 | if !inp.Main { 36 | continue 37 | } 38 | output[i] = fmt.Sprintf("model:%s name:%s layout:%s options:%s keymap:%s\n", 39 | inp.Model, inp.Name, inp.Layout, inp.Options, inp.ActiveKeymap) 40 | } 41 | return output, nil 42 | } 43 | 44 | func getDevices(h *hyprland.RequestClient) ([]keyboard, error) { 45 | devs, err := h.Devices() 46 | if err != nil { 47 | return nil, err 48 | } 49 | kbds := make([]keyboard, len(devs.Keyboards)) 50 | for i, v := range devs.Keyboards { 51 | kbds[i] = keyboard{ 52 | Address: v.Address, 53 | Name: v.Name, 54 | Rules: v.Rules, 55 | Model: v.Model, 56 | Layout: v.Layout, 57 | Variant: v.Variant, 58 | Options: v.Options, 59 | ActiveKeymap: v.ActiveKeymap, 60 | Main: v.Main, 61 | } 62 | } 63 | return kbds, nil 64 | } 65 | 66 | func CheckAvailability() bool { 67 | if os.Getenv("HYPRLAND_INSTANCE_SIGNATURE") != "" { 68 | return true 69 | } 70 | checkVars := []string{"DESKTOP_SESSION", "XDG_CURRENT_DESKTOP", "XDG_SESSION_DESKTOP"} 71 | for _, v := range checkVars { 72 | if strings.ToLower(os.Getenv(v)) == "hyprland" { 73 | return true 74 | } 75 | } 76 | return false 77 | } 78 | -------------------------------------------------------------------------------- /hyprland/wayland-hyprland.go: -------------------------------------------------------------------------------- 1 | package hyprland 2 | 3 | import ( 4 | "fmt" 5 | "log" 6 | "os" 7 | "regexp" 8 | "strconv" 9 | "sync" 10 | "time" 11 | 12 | "github.com/thiagokokada/hyprland-go" 13 | "github.com/thiagokokada/hyprland-go/helpers" 14 | ) 15 | 16 | type Hyprland struct { 17 | client *hyprland.RequestClient 18 | re *regexp.Regexp 19 | sleep time.Duration 20 | once bool 21 | debug bool 22 | 23 | m sync.RWMutex 24 | keyboards []string 25 | } 26 | 27 | func New(re *regexp.Regexp, scanPeriod time.Duration, scanOnce bool, debug bool) (*Hyprland, error) { 28 | s, err := helpers.GetSocket(helpers.RequestSocket) 29 | if err != nil { 30 | return nil, err 31 | } 32 | return &Hyprland{client: hyprland.NewClient(s), re: re, sleep: scanPeriod, once: scanOnce, debug: debug}, nil 33 | } 34 | 35 | func (h *Hyprland) Init() error { 36 | go h.matchKeyboards(h.debug) 37 | return nil 38 | } 39 | 40 | func (h *Hyprland) Switch(id int) { 41 | h.m.RLock() 42 | for _, kbd := range h.keyboards { 43 | if h.debug { 44 | log.Printf("switch hyprland kbd \"%s\" to group %d", kbd, id-1) 45 | } 46 | resp, err := h.client.SwitchXkbLayout(kbd, strconv.Itoa(id-1)) 47 | if err != nil { 48 | fmt.Fprintf(os.Stderr, "response: %v, error: %s", resp, err) 49 | } 50 | } 51 | h.m.RUnlock() 52 | } 53 | 54 | func (h *Hyprland) Name() string { 55 | return "Hyprland" 56 | } 57 | 58 | func (h *Hyprland) Close() {} 59 | 60 | func (h *Hyprland) matchKeyboards(debug bool) { 61 | for { 62 | inputs, err := getDevices(h.client) 63 | if err != nil { 64 | fmt.Fprintf(os.Stderr, "can't get input devices from Hyprland: %s", err) 65 | } 66 | h.m.Lock() 67 | h.keyboards = nil 68 | for _, in := range inputs { 69 | if h.re.MatchString(in.Name) && in.Main { 70 | if debug { 71 | log.Printf("Hyprland keyboard matched %s", in.Name) 72 | } 73 | 74 | h.keyboards = append(h.keyboards, in.Name) 75 | } 76 | } 77 | h.m.Unlock() 78 | if h.once { 79 | return 80 | } 81 | time.Sleep(h.sleep) 82 | } 83 | } 84 | -------------------------------------------------------------------------------- /shift-shift.go: -------------------------------------------------------------------------------- 1 | // Keyboard layout switcher for Xorg/XKB and Wayland/Sway. 2 | package main 3 | 4 | import ( 5 | "flag" 6 | "fmt" 7 | "log" 8 | "os" 9 | "os/signal" 10 | "regexp" 11 | "time" 12 | 13 | "github.com/grafov/shift-shift/hyprland" 14 | "github.com/grafov/shift-shift/sway" 15 | "github.com/grafov/shift-shift/xkb" 16 | 17 | "github.com/grafov/evdev" 18 | ) 19 | 20 | const scanPeriod = 4 * time.Second 21 | 22 | type switcher interface { 23 | Init() error 24 | Switch(int) 25 | Name() string 26 | Close() 27 | } 28 | 29 | // Объединение данных для удобства передачи по каналу. 30 | type message struct { 31 | Device *evdev.InputDevice 32 | Events []evdev.InputEvent 33 | } 34 | 35 | func main() { 36 | var err error 37 | listDevices := flag.Bool("list", false, `list all devices that found by evdev (not only keyboards)`) 38 | listSwayDevices := flag.Bool("list-sway", false, `list all devices recognized by Sway (not only keyboards)`) 39 | listHyprlandDevices := flag.Bool("list-hypr", false, `list all keyboards recognized by Hyprland`) 40 | printMode := flag.Bool("print", false, `print pressed keys for debug (verbose output)`) 41 | quietMode := flag.Bool("quiet", false, `be silent`) 42 | kbdRegex := flag.String("match", "keyboard", `regexp used to match input keyboard device as it listed by evdev`) 43 | wmRegex := flag.String("match-wm", "keyboard", `optional regexp used to match device in WM, if not set evdev regexp used`) 44 | keysym1 := flag.String("1", "LEFTSHIFT", `key used for switching to 1st xkb group`) 45 | keysym2 := flag.String("2", "RIGHTSHIFT", `key used for switching to 2nd xkb group`) 46 | keysym3 := flag.String("3", "", `key used for switching to 3rd xkb group`) 47 | keysym4 := flag.String("4", "", `key used for switching to 4th xkb group`) 48 | scanOnce := flag.Bool("scan-once", false, `scan for keyboards only at startup (less power consumption)`) 49 | dblKeystroke := flag.Bool("double-keystroke", false, `require pressing the same key twice to switch the layout`) 50 | dblKeyTimeout := flag.Int("double-keystroke-timeout", 500, `second keystroke timeout in milliseconds`) 51 | switchMethod := flag.String("switcher", "auto", `select method of switching (possible values are "auto", "xkb", "sway", "hypr")`) 52 | 53 | flag.Parse() 54 | terminate := make(chan os.Signal, 1) 55 | signal.Notify(terminate, os.Interrupt) 56 | 57 | if *listDevices { 58 | for devicePath, device := range getInputDevices() { 59 | fmt.Printf("%s %s\n", devicePath, device.Name) 60 | } 61 | return 62 | } 63 | if *listSwayDevices { 64 | var list []string 65 | if list, err = sway.PrintDevices(); err != nil { 66 | fmt.Fprintln(os.Stderr, err.Error()) 67 | os.Exit(1) 68 | } 69 | for _, inp := range list { 70 | fmt.Println(inp) 71 | } 72 | return 73 | } 74 | 75 | if *listHyprlandDevices { 76 | var list []string 77 | if list, err = hyprland.PrintDevices(); err != nil { 78 | fmt.Fprintln(os.Stderr, err.Error()) 79 | os.Exit(1) 80 | } 81 | for _, inp := range list { 82 | fmt.Println(inp) 83 | } 84 | return 85 | } 86 | 87 | switches := make([]uint16, 4) 88 | for i, k := range []string{*keysym1, *keysym2, *keysym3, *keysym4} { 89 | if k == "" { 90 | continue 91 | } 92 | switches[i], err = getKeyCode(k) 93 | if err != nil { 94 | fmt.Fprintln(os.Stderr, err.Error()) 95 | os.Exit(1) 96 | } 97 | } 98 | 99 | matchEvdevKbds, err := regexp.Compile(*kbdRegex) 100 | if err != nil { 101 | fmt.Fprintf( 102 | os.Stderr, 103 | "unable to compile regexp for matching devices of evdev: %s\n", 104 | err, 105 | ) 106 | os.Exit(1) 107 | } 108 | 109 | if wmRegex == nil { 110 | wmRegex = kbdRegex 111 | } 112 | 113 | matchWMKbds, err := regexp.Compile(*wmRegex) 114 | if err != nil { 115 | fmt.Fprintf( 116 | os.Stderr, 117 | "unable to compile regexp for matching devices in WM: %s\n", 118 | err, 119 | ) 120 | os.Exit(1) 121 | } 122 | 123 | var sw switcher 124 | switch *switchMethod { 125 | case "hypr": 126 | if sw, err = hyprland.New(matchWMKbds, scanPeriod, *scanOnce, *printMode); err != nil { 127 | break 128 | } 129 | case "sway": 130 | sw = sway.New(matchWMKbds, scanPeriod, *scanOnce, *printMode) 131 | case "xkb": 132 | sw = xkb.New() 133 | case "auto": 134 | fallthrough 135 | default: 136 | switch { 137 | case hyprland.CheckAvailability(): 138 | if sw, err = hyprland.New(matchWMKbds, scanPeriod, *scanOnce, *printMode); err != nil { 139 | break 140 | } 141 | case sway.CheckAvailability(): 142 | sw = sway.New(matchWMKbds, scanPeriod, *scanOnce, *printMode) 143 | default: 144 | sw = xkb.New() 145 | } 146 | } 147 | if err != nil { 148 | fmt.Fprintf( 149 | os.Stderr, 150 | "unable to start switcher: %s\n", 151 | err, 152 | ) 153 | os.Exit(1) 154 | } 155 | 156 | if !*quietMode { 157 | log.Printf("use %s switcher\n", sw.Name()) 158 | } 159 | if err = sw.Init(); err != nil { 160 | fmt.Fprintf( 161 | os.Stderr, 162 | "unable to init switcher: %s\n", 163 | err, 164 | ) 165 | os.Exit(1) 166 | } 167 | 168 | go listenKeyboards(sw, 169 | switches, 170 | *printMode, *quietMode, 171 | matchEvdevKbds, *scanOnce, 172 | *dblKeystroke, *dblKeyTimeout, 173 | ) 174 | 175 | <-terminate 176 | sw.Close() 177 | } 178 | 179 | // Возвращает keycode по текстому представлению клавиши. 180 | func getKeyCode(keysym string) (uint16, error) { 181 | for evdevKeyCode, evdevKeySym := range evdev.KEY { 182 | if evdevKeySym == "KEY_"+keysym { 183 | return uint16(evdevKeyCode), nil 184 | } 185 | } 186 | 187 | return 0, fmt.Errorf("keycode for keysym %s is not found", keysym) 188 | } 189 | 190 | func getInputDevices() map[string]*evdev.InputDevice { 191 | inputDevices := make(map[string]*evdev.InputDevice) 192 | 193 | devicePaths, err := evdev.ListInputDevicePaths("/dev/input/event*") 194 | if err == nil && len(devicePaths) > 0 { 195 | for _, devicePath := range devicePaths { 196 | device, err := evdev.Open(devicePath) 197 | if err != nil { 198 | fmt.Fprintf(os.Stderr, "unable to open device %s: %s", devicePath, err) 199 | continue 200 | } 201 | inputDevices[devicePath] = device 202 | } 203 | } 204 | return inputDevices 205 | } 206 | 207 | // Обнаруживает устройства, похожие на клавиатуры. 208 | func scanDevices(mbox chan message, deviceMatch *regexp.Regexp, quietMode bool, scanOnce bool) { 209 | keyboards := make(map[string]*evdev.InputDevice) 210 | kbdLost := make(chan string, 8) 211 | for { 212 | select { 213 | case input := <-kbdLost: 214 | delete(keyboards, input) 215 | default: 216 | for devicePath, device := range getInputDevices() { 217 | if deviceMatch.MatchString(device.Name) { 218 | if _, ok := keyboards[devicePath]; !ok { 219 | if !quietMode { 220 | log.Printf("evdev keyboard found at %s: %s", devicePath, device.Name) 221 | } 222 | if mbox != nil { 223 | keyboards[devicePath] = device 224 | go listenEvents(devicePath, device, mbox, kbdLost, quietMode) 225 | } 226 | } 227 | } else { 228 | err := device.File.Close() 229 | if err != nil { 230 | log.Printf("unable to close device %q: %s", device.Name, err) 231 | } 232 | } 233 | } 234 | if scanOnce { 235 | return 236 | } 237 | time.Sleep(scanPeriod) 238 | } 239 | } 240 | } 241 | 242 | // Принимает события ото всех клавиатур. 243 | func listenKeyboards( 244 | sw switcher, 245 | switches []uint16, 246 | printMode, quietMode bool, deviceMatch *regexp.Regexp, 247 | scanOnce bool, dblKeystroke bool, dblKeyTimeout int, 248 | ) { 249 | var ( 250 | useGroup int 251 | t *time.Timer 252 | ) 253 | 254 | inbox := make(chan message, 8) 255 | kbdLost := make(chan bool, 8) 256 | kbdLost <- true // init 257 | if dblKeystroke { 258 | t = time.NewTimer(time.Duration(dblKeyTimeout) * time.Millisecond) 259 | } 260 | 261 | go scanDevices(inbox, deviceMatch, quietMode, scanOnce) 262 | 263 | var prevKey evdev.InputEvent 264 | for msg := range inbox { 265 | for _, ev := range msg.Events { 266 | if ev.Type != evdev.EV_KEY { 267 | continue 268 | } 269 | if prevKey.Code == ev.Code && prevKey.Value == ev.Value && prevKey.Type == ev.Type { 270 | continue 271 | } 272 | prevKey.Type = ev.Type 273 | prevKey.Code = ev.Code 274 | prevKey.Value = ev.Value 275 | if printMode { 276 | var pv string 277 | switch ev.Value { 278 | case 0: 279 | pv = "released" 280 | case 1: 281 | pv = "pressed" 282 | case 2: 283 | pv = "hold" 284 | default: 285 | pv = "undefined status" 286 | } 287 | log.Printf("%s type:%v code:%v %s", msg.Device.Name, ev.Type, ev.Code, pv) 288 | } 289 | switch ev.Value { 290 | case 1: // key down 291 | useGroup = 0 292 | for i, k := range switches { 293 | if ev.Code != k { 294 | continue 295 | } 296 | ready := true 297 | if dblKeystroke { 298 | t, ready = checkTimeout(t, dblKeyTimeout) 299 | } 300 | if ready { 301 | useGroup = i + 1 302 | } 303 | } 304 | case 0: // key up 305 | if useGroup == 0 { 306 | break 307 | } 308 | for i, k := range switches { 309 | if ev.Code != k { 310 | continue 311 | } 312 | if useGroup == i+1 { 313 | if printMode { 314 | log.Printf("%s switches group to %d", msg.Device.Name, useGroup) 315 | } 316 | sw.Switch(useGroup) 317 | } 318 | } 319 | useGroup = 0 320 | } 321 | } 322 | } 323 | } 324 | 325 | // Check new key presses/releases from choosen keyboards. 326 | func listenEvents( 327 | name string, 328 | kbd *evdev.InputDevice, 329 | replyTo chan message, 330 | kbdLost chan string, 331 | quietMode bool, 332 | ) { 333 | for { 334 | events, err := kbd.Read() 335 | if err != nil || len(events) == 0 { 336 | if !quietMode { 337 | log.Printf("keyboard %s disconnected", kbd.Name) 338 | } 339 | kbdLost <- name 340 | return 341 | } 342 | 343 | replyTo <- message{Device: kbd, Events: events} 344 | } 345 | } 346 | 347 | // Checks if the key was pressed before the timer was expired 348 | // Resets expired timer 349 | func checkTimeout(t *time.Timer, timeout int) (*time.Timer, bool) { 350 | if t.Stop() { 351 | return t, true 352 | } 353 | t.Reset(time.Duration(timeout) * time.Millisecond) 354 | return t, false 355 | } 356 | -------------------------------------------------------------------------------- /sway/connect.go: -------------------------------------------------------------------------------- 1 | package sway 2 | 3 | import ( 4 | "bytes" 5 | "os/exec" 6 | ) 7 | 8 | const swaymsg = "swaymsg" 9 | 10 | func swayexec(command ...string) ([]byte, error) { 11 | var stdout, stderr bytes.Buffer 12 | cmd := exec.Command(swaymsg, command...) 13 | cmd.Stdout = &stdout 14 | cmd.Stderr = &stderr 15 | err := cmd.Run() 16 | return stdout.Bytes(), err 17 | } 18 | -------------------------------------------------------------------------------- /sway/connect_test.go: -------------------------------------------------------------------------------- 1 | package sway 2 | 3 | import "testing" 4 | 5 | func TestCommand(t *testing.T) { 6 | _, err := swayexec("-t", "get_inputs") 7 | if err != nil { 8 | t.Log(err) 9 | t.Fail() 10 | } 11 | } 12 | -------------------------------------------------------------------------------- /sway/helpers.go: -------------------------------------------------------------------------------- 1 | package sway 2 | 3 | import ( 4 | "encoding/json" 5 | "fmt" 6 | "os" 7 | "strings" 8 | ) 9 | 10 | func CheckAvailability() bool { 11 | if os.Getenv("SWAYSOCK") != "" { 12 | return true 13 | } 14 | checkVars := []string{"DESKTOP_SESSION", "XDG_CURRENT_DESKTOP", "XDG_SESSION_DESKTOP"} 15 | for _, v := range checkVars { 16 | if strings.ToLower(os.Getenv(v)) == "sway" { 17 | return true 18 | } 19 | } 20 | return false 21 | } 22 | 23 | type device struct { 24 | Identifier string `json:"identifier"` 25 | Name string `json:"name"` 26 | Type string `json:"type"` 27 | XkbActiveLayoutIndex int `json:"xkb_active_layout_index"` 28 | XkbActiveLayoutName string `json:"xkb_active_layout_name"` 29 | } 30 | 31 | func getDevices() ([]device, error) { 32 | out, err := swayexec("-t", "get_inputs") 33 | if err != nil { 34 | return nil, err 35 | } 36 | var inputs []device 37 | if err = json.Unmarshal(out, &inputs); err != nil { 38 | return nil, err 39 | } 40 | return inputs, nil 41 | } 42 | 43 | func PrintDevices() ([]string, error) { 44 | inputs, err := getDevices() 45 | if err != nil { 46 | return nil, err 47 | } 48 | output := make([]string, len(inputs)) 49 | for i, inp := range inputs { 50 | output[i] = fmt.Sprintf("%s type:%s name:%s layout:%s group:%d\n", 51 | inp.Identifier, inp.Type, inp.Name, inp.XkbActiveLayoutName, inp.XkbActiveLayoutIndex) 52 | } 53 | return output, err 54 | } 55 | -------------------------------------------------------------------------------- /sway/wayland-sway.go: -------------------------------------------------------------------------------- 1 | package sway 2 | 3 | import ( 4 | "fmt" 5 | "log" 6 | "os" 7 | "regexp" 8 | "strings" 9 | "sync" 10 | "time" 11 | ) 12 | 13 | const swayKbdType = "keyboard" 14 | 15 | type Sway struct { 16 | re *regexp.Regexp 17 | sleep time.Duration 18 | once bool 19 | debug bool 20 | 21 | m sync.Mutex 22 | keyboards []string 23 | } 24 | 25 | func New(re *regexp.Regexp, scanPeriod time.Duration, scanOnce bool, debug bool) *Sway { 26 | return &Sway{re: re, sleep: scanPeriod, once: scanOnce, debug: debug} 27 | } 28 | 29 | func (s *Sway) Init() error { 30 | go s.matchOnlyKeyboards() 31 | return nil 32 | } 33 | 34 | func (*Sway) Name() string { 35 | return "Sway" 36 | } 37 | 38 | func (s *Sway) Switch(idx int) { 39 | var totalcmd strings.Builder 40 | for _, n := range s.keyboards { 41 | if s.debug { 42 | log.Printf("switch sway kbd \"%s\" to group %d", n, idx-1) 43 | } 44 | totalcmd.WriteString(fmt.Sprintf("input %s xkb_switch_layout %d;", n, idx-1)) 45 | } 46 | if _, err := swayexec(totalcmd.String()); err != nil { 47 | fmt.Fprintf(os.Stderr, "sway error on switching: %s\n", err) 48 | } 49 | } 50 | 51 | func (*Sway) Close() {} 52 | 53 | func (s *Sway) matchOnlyKeyboards() { 54 | for { 55 | inputs, err := getDevices() 56 | if err != nil { 57 | fmt.Fprintf(os.Stderr, "can't get input devices from Sway: %s", err) 58 | } 59 | s.m.Lock() 60 | s.keyboards = nil 61 | for _, i := range inputs { 62 | if s.re.MatchString(i.Name) && i.Type == swayKbdType { 63 | s.keyboards = append(s.keyboards, i.Identifier) 64 | } 65 | } 66 | s.m.Unlock() 67 | if s.once { 68 | return 69 | } 70 | time.Sleep(s.sleep) 71 | } 72 | } 73 | -------------------------------------------------------------------------------- /xkb/xkb.go: -------------------------------------------------------------------------------- 1 | package xkb 2 | 3 | // #cgo LDFLAGS: -lX11 4 | // #include 5 | // #include 6 | // #include 7 | // #include 8 | // #include 9 | import "C" 10 | 11 | import ( 12 | "fmt" 13 | "log" 14 | ) 15 | 16 | type Xkb struct { 17 | display *C.Display 18 | } 19 | 20 | func New() *Xkb { 21 | return &Xkb{} 22 | } 23 | 24 | func (*Xkb) Name() string { 25 | return "XKB" 26 | } 27 | 28 | func (x *Xkb) Init() error { 29 | var err error 30 | x.display, err = openDisplay() 31 | if err != nil { 32 | return fmt.Errorf("unable to open X display: %w\n", err) 33 | } 34 | return nil 35 | } 36 | 37 | func (x *Xkb) Switch(idx int) { 38 | var group uint 39 | switch idx { 40 | case 1: 41 | group = C.XkbGroup1Index 42 | case 2: 43 | group = C.XkbGroup2Index 44 | case 3: 45 | group = C.XkbGroup3Index 46 | case 4: 47 | group = C.XkbGroup4Index 48 | default: 49 | group = C.XkbGroup1Index 50 | } 51 | result := C.XkbLockGroup(x.display, C.XkbUseCoreKbd, C.uint(group)) 52 | if result != 1 { 53 | log.Println("unable to send lock group request to X11") 54 | return 55 | } 56 | // immideately output events buffer 57 | C.XFlush(x.display) 58 | } 59 | 60 | func (x *Xkb) Close() { 61 | C.XCloseDisplay(x.display) 62 | } 63 | 64 | func openDisplay() (*C.Display, error) { 65 | var xkbEventType, xkbError, xkbReason C.int 66 | var majorVers, minorVers C.int 67 | 68 | majorVers = C.XkbMajorVersion 69 | minorVers = C.XkbMinorVersion 70 | 71 | display := C.XkbOpenDisplay( 72 | nil, &xkbEventType, &xkbError, &majorVers, &minorVers, &xkbReason, 73 | ) 74 | if display == nil { 75 | switch xkbReason { 76 | case C.XkbOD_BadServerVersion: 77 | case C.XkbOD_BadLibraryVersion: 78 | return nil, fmt.Errorf("incompatible versions of client and server XKB libraries") 79 | case C.XkbOD_ConnectionRefused: 80 | return nil, fmt.Errorf("connection to X server refused") 81 | case C.XkbOD_NonXkbServer: 82 | return nil, fmt.Errorf("XKB extension is not present") 83 | default: 84 | return nil, fmt.Errorf("unknown error from XkbOpenDisplay: %d", xkbReason) 85 | } 86 | } 87 | 88 | return display, nil 89 | } 90 | --------------------------------------------------------------------------------