evdev: add evdev monitor for caps lock state

core/.mockery.yml

@@ -40,3 +40,9 @@ packages:
       outpkg: mocks_cups
     interfaces:
       CUPSClientInterface:
+  github.com/AvengeMedia/DankMaterialShell/core/internal/server/evdev:
+    config:
+      dir: "internal/mocks/evdev"
+      outpkg: mocks_evdev
+    interfaces:
+      EvdevDevice:

core/README.md

@@ -31,6 +31,7 @@ Distribution-aware installer with TUI for deploying DMS and compositor configura
 - DDC/CI protocol - External monitor brightness control (like `ddcutil`)
 - Backlight control - Internal display brightness via `login1` or sysfs
 - LED control - Keyboard/device LED management
+- evdev input monitoring - Keyboard state tracking (caps lock, etc.)
 
 **Plugin System**
 - Plugin registry integration

core/go.mod

@@ -9,6 +9,7 @@ require (
 	github.com/charmbracelet/lipgloss v1.1.0
 	github.com/charmbracelet/log v0.4.2
 	github.com/godbus/dbus/v5 v5.1.0
+	github.com/holoplot/go-evdev v0.0.0-20250804134636-ab1d56a1fe83
 	github.com/spf13/cobra v1.10.1
 	github.com/stretchr/testify v1.11.1
 	github.com/yaslama/go-wayland/wayland v0.0.0-20250907155644-2874f32d9c34
@@ -61,7 +62,6 @@ require (
 	github.com/spf13/afero v1.15.0
 	github.com/spf13/pflag v1.0.10 // indirect
 	github.com/xo/terminfo v0.0.0-20220910002029-abceb7e1c41e // indirect
-	golang.org/x/sync v0.18.0 // indirect
 	golang.org/x/sys v0.38.0
 	golang.org/x/text v0.31.0 // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect

core/go.sum

@@ -14,12 +14,8 @@ github.com/aymanbagabas/go-osc52/v2 v2.0.1 h1:HwpRHbFMcZLEVr42D4p7XBqjyuxQH5SMiE
 github.com/aymanbagabas/go-osc52/v2 v2.0.1/go.mod h1:uYgXzlJ7ZpABp8OJ+exZzJJhRNQ2ASbcXHWsFqH8hp8=
 github.com/charmbracelet/bubbles v0.21.0 h1:9TdC97SdRVg/1aaXNVWfFH3nnLAwOXr8Fn6u6mfQdFs=
 github.com/charmbracelet/bubbles v0.21.0/go.mod h1:HF+v6QUR4HkEpz62dx7ym2xc71/KBHg+zKwJtMw+qtg=
-github.com/charmbracelet/bubbletea v1.3.6 h1:VkHIxPJQeDt0aFJIsVxw8BQdh/F/L2KKZGsK6et5taU=
-github.com/charmbracelet/bubbletea v1.3.6/go.mod h1:oQD9VCRQFF8KplacJLo28/jofOI2ToOfGYeFgBBxHOc=
 github.com/charmbracelet/bubbletea v1.3.10 h1:otUDHWMMzQSB0Pkc87rm691KZ3SWa4KUlvF9nRvCICw=
 github.com/charmbracelet/bubbletea v1.3.10/go.mod h1:ORQfo0fk8U+po9VaNvnV95UPWA1BitP1E0N6xJPlHr4=
-github.com/charmbracelet/colorprofile v0.2.3-0.20250311203215-f60798e515dc h1:4pZI35227imm7yK2bGPcfpFEmuY1gc2YSTShr4iJBfs=
-github.com/charmbracelet/colorprofile v0.2.3-0.20250311203215-f60798e515dc/go.mod h1:X4/0JoqgTIPSFcRA/P6INZzIuyqdFY5rm8tb41s9okk=
 github.com/charmbracelet/colorprofile v0.3.3 h1:DjJzJtLP6/NZ8p7Cgjno0CKGr7wwRJGxWUwh2IyhfAI=
 github.com/charmbracelet/colorprofile v0.3.3/go.mod h1:nB1FugsAbzq284eJcjfah2nhdSLppN2NqvfotkfRYP4=
 github.com/charmbracelet/harmonica v0.2.0 h1:8NxJWRWg/bzKqqEaaeFNipOu77YR5t8aSwG4pgaUBiQ=
@@ -28,16 +24,10 @@ github.com/charmbracelet/lipgloss v1.1.0 h1:vYXsiLHVkK7fp74RkV7b2kq9+zDLoEU4MZoF
 github.com/charmbracelet/lipgloss v1.1.0/go.mod h1:/6Q8FR2o+kj8rz4Dq0zQc3vYf7X+B0binUUBwA0aL30=
 github.com/charmbracelet/log v0.4.2 h1:hYt8Qj6a8yLnvR+h7MwsJv/XvmBJXiueUcI3cIxsyig=
 github.com/charmbracelet/log v0.4.2/go.mod h1:qifHGX/tc7eluv2R6pWIpyHDDrrb/AG71Pf2ysQu5nw=
-github.com/charmbracelet/x/ansi v0.9.3 h1:BXt5DHS/MKF+LjuK4huWrC6NCvHtexww7dMayh6GXd0=
-github.com/charmbracelet/x/ansi v0.9.3/go.mod h1:3RQDQ6lDnROptfpWuUVIUG64bD2g2BgntdxH0Ya5TeE=
 github.com/charmbracelet/x/ansi v0.11.0 h1:uuIVK7GIplwX6UBIz8S2TF8nkr7xRlygSsBRjSJqIvA=
 github.com/charmbracelet/x/ansi v0.11.0/go.mod h1:uQt8bOrq/xgXjlGcFMc8U2WYbnxyjrKhnvTQluvfCaE=
-github.com/charmbracelet/x/cellbuf v0.0.13-0.20250311204145-2c3ea96c31dd h1:vy0GVL4jeHEwG5YOXDmi86oYw2yuYUGqz6a8sLwg0X8=
-github.com/charmbracelet/x/cellbuf v0.0.13-0.20250311204145-2c3ea96c31dd/go.mod h1:xe0nKWGd3eJgtqZRaN9RjMtK7xUYchjzPr7q6kcvCCs=
 github.com/charmbracelet/x/cellbuf v0.0.14 h1:iUEMryGyFTelKW3THW4+FfPgi4fkmKnnaLOXuc+/Kj4=
 github.com/charmbracelet/x/cellbuf v0.0.14/go.mod h1:P447lJl49ywBbil/KjCk2HexGh4tEY9LH0/1QrZZ9rA=
-github.com/charmbracelet/x/term v0.2.1 h1:AQeHeLZ1OqSXhrAWpYUtZyX1T3zVxfpZuEQMIQaGIAQ=
-github.com/charmbracelet/x/term v0.2.1/go.mod h1:oQ4enTYFV7QN4m0i9mzHrViD7TQKvNEEkHUMCmsxdUg=
 github.com/charmbracelet/x/term v0.2.2 h1:xVRT/S2ZcKdhhOuSP4t5cLi5o+JxklsoEObBSgfgZRk=
 github.com/charmbracelet/x/term v0.2.2/go.mod h1:kF8CY5RddLWrsgVwpw4kAa6TESp6EB5y3uxGLeCqzAI=
 github.com/clipperhouse/displaywidth v0.5.0 h1:AIG5vQaSL2EKqzt0M9JMnvNxOCRTKUc4vUnLWGgP89I=
@@ -49,8 +39,6 @@ github.com/clipperhouse/uax29/v2 v2.3.0/go.mod h1:Wn1g7MK6OoeDT0vL+Q0SQLDz/KpfsV
 github.com/cloudflare/circl v1.6.1 h1:zqIqSPIndyBh1bjLVVDHMPpVKqp8Su/V+6MeDzzQBQ0=
 github.com/cloudflare/circl v1.6.1/go.mod h1:uddAzsPgqdMAYatqJ0lsjX1oECcQLIlRpzZh3pJrofs=
 github.com/cpuguy83/go-md2man/v2 v2.0.6/go.mod h1:oOW0eioCTA6cOiMLiUPZOpcVxMig6NIQQ7OS05n1F4g=
-github.com/cyphar/filepath-securejoin v0.4.1 h1:JyxxyPEaktOD+GAnqIqTf9A8tHyAG22rowi7HkoSU1s=
-github.com/cyphar/filepath-securejoin v0.4.1/go.mod h1:Sdj7gXlvMcPZsbhwhQ33GguGLDGQL7h7bg04C/+u9jI=
 github.com/cyphar/filepath-securejoin v0.6.0 h1:BtGB77njd6SVO6VztOHfPxKitJvd/VPT+OFBFMOi1Is=
 github.com/cyphar/filepath-securejoin v0.6.0/go.mod h1:A8hd4EnAeyujCJRrICiOWqjS1AX0a9kM5XL+NwKoYSc=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
@@ -66,25 +54,23 @@ github.com/gliderlabs/ssh v0.3.8 h1:a4YXD1V7xMF9g5nTkdfnja3Sxy1PVDCj1Zg4Wb8vY6c=
 github.com/gliderlabs/ssh v0.3.8/go.mod h1:xYoytBv1sV0aL3CavoDuJIQNURXkkfPA/wxQ1pL1fAU=
 github.com/go-git/gcfg/v2 v2.0.2 h1:MY5SIIfTGGEMhdA7d7JePuVVxtKL7Hp+ApGDJAJ7dpo=
 github.com/go-git/gcfg/v2 v2.0.2/go.mod h1:/lv2NsxvhepuMrldsFilrgct6pxzpGdSRC13ydTLSLs=
-github.com/go-git/go-billy/v6 v6.0.0-20250627091229-31e2a16eef30 h1:4KqVJTL5eanN8Sgg3BV6f2/QzfZEFbCd+rTak1fGRRA=
-github.com/go-git/go-billy/v6 v6.0.0-20250627091229-31e2a16eef30/go.mod h1:snwvGrbywVFy2d6KJdQ132zapq4aLyzLMgpo79XdEfM=
 github.com/go-git/go-billy/v6 v6.0.0-20251111123000-fb5ff8f3f0b0 h1:EC9n6hr6yKDoVJ6g7Ko523LbbceJfR0ohbOp809Fyf4=
 github.com/go-git/go-billy/v6 v6.0.0-20251111123000-fb5ff8f3f0b0/go.mod h1:E3VhlS+AKkrq6ZNn1axE2/nDRJ87l1FJk9r5HT2vPX0=
 github.com/go-git/go-git-fixtures/v5 v5.1.1 h1:OH8i1ojV9bWfr0ZfasfpgtUXQHQyVS8HXik/V1C099w=
 github.com/go-git/go-git-fixtures/v5 v5.1.1/go.mod h1:Altk43lx3b1ks+dVoAG2300o5WWUnktvfY3VI6bcaXU=
-github.com/go-git/go-git/v6 v6.0.0-20250929195514-145daf2492dd h1:30HEd5KKVM7GgMJ1GSNuYxuZXEg8Pdlngp6T51faxoc=
-github.com/go-git/go-git/v6 v6.0.0-20250929195514-145daf2492dd/go.mod h1:lz8PQr/p79XpFq5ODVBwRJu5LnOF8Et7j95ehqmCMJU=
 github.com/go-git/go-git/v6 v6.0.0-20251112161705-8cc3e21f07a9 h1:SOFrnF9LCssC6q6Rb0084Bzg2aBYbe8QXv9xKGXmt/w=
 github.com/go-git/go-git/v6 v6.0.0-20251112161705-8cc3e21f07a9/go.mod h1:0wtvm/JfPC9RFVEAP3ks0ec5h64/qmZkTTUE3pjz7Hc=
-github.com/go-logfmt/logfmt v0.6.0 h1:wGYYu3uicYdqXVgoYbvnkrPVXkuLM1p1ifugDMEdRi4=
-github.com/go-logfmt/logfmt v0.6.0/go.mod h1:WYhtIu8zTZfxdn5+rREduYbwxfcBr/Vr6KEVveWlfTs=
 github.com/go-logfmt/logfmt v0.6.1 h1:4hvbpePJKnIzH1B+8OR/JPbTx37NktoI9LE2QZBBkvE=
 github.com/go-logfmt/logfmt v0.6.1/go.mod h1:EV2pOAQoZaT1ZXZbqDl5hrymndi4SY9ED9/z6CO0XAk=
 github.com/godbus/dbus/v5 v5.1.0 h1:4KLkAxT3aOY8Li4FRJe/KvhoNFFxo0m6fNuFUO8QJUk=
 github.com/godbus/dbus/v5 v5.1.0/go.mod h1:xhWf0FNVPg57R7Z0UbKHbJfkEywrmjJnf7w5xrFpKfA=
 github.com/golang/groupcache v0.0.0-20241129210726-2c02b8208cf8 h1:f+oWsMOmNPc8JmEHVZIycC7hBoQxHH9pNKQORJNozsQ=
 github.com/golang/groupcache v0.0.0-20241129210726-2c02b8208cf8/go.mod h1:wcDNUvekVysuuOpQKo3191zZyTpiI6se1N1ULghS0sw=
+github.com/google/go-cmp v0.7.0 h1:wk8382ETsv4JYUZwIsn6YpYiWiBsYLSJiTsyBybVuN8=
+github.com/google/go-cmp v0.7.0/go.mod h1:pXiqmnSA92OHEEa9HXL2W4E7lf9JzCmGVUdgjX3N/iU=
 github.com/google/uuid v1.3.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
+github.com/holoplot/go-evdev v0.0.0-20250804134636-ab1d56a1fe83 h1:B+A58zGFuDrvEZpPN+yS6swJA0nzqgZvDzgl/OPyefU=
+github.com/holoplot/go-evdev v0.0.0-20250804134636-ab1d56a1fe83/go.mod h1:iHAf8OIncO2gcQ8XOjS7CMJ2aPbX2Bs0wl5pZyanEqk=
 github.com/inconshreveable/mousetrap v1.1.0 h1:wN+x4NVGpMsO7ErUn/mUI3vEoE6Jt13X2s0bqwp9tc8=
 github.com/inconshreveable/mousetrap v1.1.0/go.mod h1:vpF70FUmC8bwa3OWnCshd2FqLfsEA9PFc4w1p2J65bw=
 github.com/kevinburke/ssh_config v1.4.0 h1:6xxtP5bZ2E4NF5tuQulISpTO2z8XbtH8cg1PWkxoFkQ=
@@ -103,8 +89,6 @@ github.com/mattn/go-isatty v0.0.20 h1:xfD0iDuEKnDkl03q4limB+vH+GxLEtL/jb4xVJSWWE
 github.com/mattn/go-isatty v0.0.20/go.mod h1:W+V8PltTTMOvKvAeJH7IuucS94S2C6jfK/D7dTCTo3Y=
 github.com/mattn/go-localereader v0.0.1 h1:ygSAOl7ZXTx4RdPYinUpg6W99U8jWvWi9Ye2JC/oIi4=
 github.com/mattn/go-localereader v0.0.1/go.mod h1:8fBrzywKY7BI3czFoHkuzRoWE9C+EiG4R1k4Cjx5p88=
-github.com/mattn/go-runewidth v0.0.16 h1:E5ScNMtiwvlvB5paMFdw9p4kSQzbXFikJ5SQO6TULQc=
-github.com/mattn/go-runewidth v0.0.16/go.mod h1:Jdepj2loyihRzMpdS35Xk/zdY8IAYHsh153qUoGf23w=
 github.com/mattn/go-runewidth v0.0.19 h1:v++JhqYnZuu5jSKrk9RbgF5v4CGUjqRfBm05byFGLdw=
 github.com/mattn/go-runewidth v0.0.19/go.mod h1:XBkDxAl56ILZc9knddidhrOlY5R/pDhgLpndooCuJAs=
 github.com/muesli/ansi v0.0.0-20230316100256-276c6243b2f6 h1:ZK8zHtRHOkbHy6Mmr5D264iyp3TiX5OmNcI5cIARiQI=
@@ -117,7 +101,6 @@ github.com/pjbgf/sha1cd v0.5.0 h1:a+UkboSi1znleCDUNT3M5YxjOnN1fz2FhN48FlwCxs0=
 github.com/pjbgf/sha1cd v0.5.0/go.mod h1:lhpGlyHLpQZoxMv8HcgXvZEhcGs0PG/vsZnEJ7H0iCM=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
-github.com/rivo/uniseg v0.2.0/go.mod h1:J6wj4VEh+S6ZtnVlnTBMWIodfgj8LQOQFoIToxlJtxc=
 github.com/rivo/uniseg v0.4.7 h1:WUdvkW8uEhrYfLC4ZzdpI2ztxP1I582+49Oc5Mq64VQ=
 github.com/rivo/uniseg v0.4.7/go.mod h1:FN3SvrM+Zdj16jyLfmOkMNblXMcoc8DfTHruCPUcx88=
 github.com/rogpeppe/go-internal v1.14.1 h1:UQB4HGPB6osV0SQTLymcB4TgvyWu6ZyliaW0tI/otEQ=
@@ -127,18 +110,12 @@ github.com/sergi/go-diff v1.4.0 h1:n/SP9D5ad1fORl+llWyN+D6qoUETXNZARKjyY2/KVCw=
 github.com/sergi/go-diff v1.4.0/go.mod h1:A0bzQcvG0E7Rwjx0REVgAGH58e96+X0MeOfepqsbeW4=
 github.com/spf13/afero v1.15.0 h1:b/YBCLWAJdFWJTN9cLhiXXcD7mzKn9Dm86dNnfyQw1I=
 github.com/spf13/afero v1.15.0/go.mod h1:NC2ByUVxtQs4b3sIUphxK0NioZnmxgyCrfzeuq8lxMg=
-github.com/spf13/cobra v1.9.1 h1:CXSaggrXdbHK9CF+8ywj8Amf7PBRmPCOJugH954Nnlo=
-github.com/spf13/cobra v1.9.1/go.mod h1:nDyEzZ8ogv936Cinf6g1RU9MRY64Ir93oCnqb9wxYW0=
 github.com/spf13/cobra v1.10.1 h1:lJeBwCfmrnXthfAupyUTzJ/J4Nc1RsHC/mSRU2dll/s=
 github.com/spf13/cobra v1.10.1/go.mod h1:7SmJGaTHFVBY0jW4NXGluQoLvhqFQM+6XSKD+P4XaB0=
-github.com/spf13/pflag v1.0.6 h1:jFzHGLGAlb3ruxLB8MhbI6A8+AQX/2eW4qeyNZXNp2o=
-github.com/spf13/pflag v1.0.6/go.mod h1:McXfInJRrz4CZXVZOBLb0bTZqETkiAhM9Iw0y3An2Bg=
 github.com/spf13/pflag v1.0.9/go.mod h1:McXfInJRrz4CZXVZOBLb0bTZqETkiAhM9Iw0y3An2Bg=
 github.com/spf13/pflag v1.0.10 h1:4EBh2KAYBwaONj6b2Ye1GiHfwjqyROoF4RwYO+vPwFk=
 github.com/spf13/pflag v1.0.10/go.mod h1:McXfInJRrz4CZXVZOBLb0bTZqETkiAhM9Iw0y3An2Bg=
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
-github.com/stretchr/objx v0.5.2 h1:xuMeJ0Sdp5ZMRXx/aWO6RZxdr3beISkG5/G/aIRr3pY=
-github.com/stretchr/objx v0.5.2/go.mod h1:FRsXN1f5AsAjCGJKqEizvkpNtU+EGNCLh3NxZ/8L+MA=
 github.com/stretchr/objx v0.5.3 h1:jmXUvGomnU1o3W/V5h2VEradbpJDwGrzugQQvL0POH4=
 github.com/stretchr/objx v0.5.3/go.mod h1:rDQraq+vQZU7Fde9LOZLr8Tax6zZvy4kuNKF+QYS+U0=
 github.com/stretchr/testify v1.4.0/go.mod h1:j7eGeouHqKxXV5pUuKE4zz7dFj8WfuZ+81PSLYec5m4=
@@ -148,33 +125,18 @@ github.com/xo/terminfo v0.0.0-20220910002029-abceb7e1c41e h1:JVG44RsyaB9T2KIHavM
 github.com/xo/terminfo v0.0.0-20220910002029-abceb7e1c41e/go.mod h1:RbqR21r5mrJuqunuUZ/Dhy/avygyECGrLceyNeo4LiM=
 github.com/yaslama/go-wayland/wayland v0.0.0-20250907155644-2874f32d9c34 h1:iTAt1me6SBYsuzrl/CmrxtATPlOG/pVviosM3DhUdKE=
 github.com/yaslama/go-wayland/wayland v0.0.0-20250907155644-2874f32d9c34/go.mod h1:jzmUN5lUAv2O8e63OvcauV4S30rIZ1BvF/PNYE37vDo=
-golang.org/x/crypto v0.42.0 h1:chiH31gIWm57EkTXpwnqf8qeuMUi0yekh6mT2AvFlqI=
-golang.org/x/crypto v0.42.0/go.mod h1:4+rDnOTJhQCx2q7/j6rAN5XDw8kPjeaXEUR2eL94ix8=
 golang.org/x/crypto v0.44.0 h1:A97SsFvM3AIwEEmTBiaxPPTYpDC47w720rdiiUvgoAU=
 golang.org/x/crypto v0.44.0/go.mod h1:013i+Nw79BMiQiMsOPcVCB5ZIJbYkerPrGnOa00tvmc=
-golang.org/x/exp v0.0.0-20231006140011-7918f672742d h1:jtJma62tbqLibJ5sFQz8bKtEM8rJBtfilJ2qTU199MI=
-golang.org/x/exp v0.0.0-20231006140011-7918f672742d/go.mod h1:ldy0pHrwJyGW56pPQzzkH36rKxoZW1tw7ZJpeKx+hdo=
 golang.org/x/exp v0.0.0-20251113190631-e25ba8c21ef6 h1:zfMcR1Cs4KNuomFFgGefv5N0czO2XZpUbxGUy8i8ug0=
 golang.org/x/exp v0.0.0-20251113190631-e25ba8c21ef6/go.mod h1:46edojNIoXTNOhySWIWdix628clX9ODXwPsQuG6hsK0=
-golang.org/x/net v0.44.0 h1:evd8IRDyfNBMBTTY5XRF1vaZlD+EmWx6x8PkhR04H/I=
-golang.org/x/net v0.44.0/go.mod h1:ECOoLqd5U3Lhyeyo/QDCEVQ4sNgYsqvCZ722XogGieY=
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 golang.org/x/net v0.47.0/go.mod h1:/jNxtkgq5yWUGYkaZGqo27cfGZ1c5Nen03aYrrKpVRU=
-golang.org/x/sync v0.17.0 h1:l60nONMj9l5drqw6jlhIELNv9I0A4OFgRsG9k2oT9Ug=
-golang.org/x/sync v0.17.0/go.mod h1:9KTHXmSnoGruLpwFjVSX0lNNA75CykiMECbovNTZqGI=
-golang.org/x/sync v0.18.0 h1:kr88TuHDroi+UVf+0hZnirlk8o8T+4MrK6mr60WkH/I=
-golang.org/x/sync v0.18.0/go.mod h1:9KTHXmSnoGruLpwFjVSX0lNNA75CykiMECbovNTZqGI=
 golang.org/x/sys v0.0.0-20210809222454-d867a43fc93e/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.6.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.36.0 h1:KVRy2GtZBrk1cBYA7MKu5bEZFxQk4NIDV6RLVcC8o0k=
-golang.org/x/sys v0.36.0/go.mod h1:OgkHotnGiDImocRcuBABYBEXf8A9a87e/uXjp9XT3ks=
 golang.org/x/sys v0.38.0 h1:3yZWxaJjBmCWXqhN1qh02AkOnCQ1poK6oF+a7xWL6Gc=
 golang.org/x/sys v0.38.0/go.mod h1:OgkHotnGiDImocRcuBABYBEXf8A9a87e/uXjp9XT3ks=
-golang.org/x/term v0.35.0 h1:bZBVKBudEyhRcajGcNc3jIfWPqV4y/Kt2XcoigOWtDQ=
-golang.org/x/term v0.35.0/go.mod h1:TPGtkTLesOwf2DE8CgVYiZinHAOuy5AYUYT1lENIZnA=
 golang.org/x/term v0.37.0 h1:8EGAD0qCmHYZg6J17DvsMy9/wJ7/D/4pV/wfnld5lTU=
-golang.org/x/text v0.29.0 h1:1neNs90w9YzJ9BocxfsQNHKuAT4pkghyXc4nhZ6sJvk=
+golang.org/x/term v0.37.0/go.mod h1:5pB4lxRNYYVZuTLmy8oR2BH8dflOR+IbTYFD8fi3254=
-golang.org/x/text v0.29.0/go.mod h1:7MhJOA9CD2qZyOKYazxdYMF85OwPdEr9jTtBpO7ydH4=
 golang.org/x/text v0.31.0 h1:aC8ghyu4JhP8VojJ2lEHBnochRno1sgL6nEi9WGFGMM=
 golang.org/x/text v0.31.0/go.mod h1:tKRAlv61yKIjGGHX/4tP1LTbc13YSec1pxVEWXzfoeM=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=

core/internal/mocks/evdev/mock_EvdevDevice.go

@@ -0,0 +1,295 @@
+// Code generated by mockery v2.53.5. DO NOT EDIT.
+
+package mocks_evdev
+
+import (
+	go_evdev "github.com/holoplot/go-evdev"
+	mock "github.com/stretchr/testify/mock"
+)
+
+// MockEvdevDevice is an autogenerated mock type for the EvdevDevice type
+type MockEvdevDevice struct {
+	mock.Mock
+}
+
+type MockEvdevDevice_Expecter struct {
+	mock *mock.Mock
+}
+
+func (_m *MockEvdevDevice) EXPECT() *MockEvdevDevice_Expecter {
+	return &MockEvdevDevice_Expecter{mock: &_m.Mock}
+}
+
+// Close provides a mock function with no fields
+func (_m *MockEvdevDevice) Close() error {
+	ret := _m.Called()
+
+	if len(ret) == 0 {
+		panic("no return value specified for Close")
+	}
+
+	var r0 error
+	if rf, ok := ret.Get(0).(func() error); ok {
+		r0 = rf()
+	} else {
+		r0 = ret.Error(0)
+	}
+
+	return r0
+}
+
+// MockEvdevDevice_Close_Call is a *mock.Call that shadows Run/Return methods with type explicit version for method 'Close'
+type MockEvdevDevice_Close_Call struct {
+	*mock.Call
+}
+
+// Close is a helper method to define mock.On call
+func (_e *MockEvdevDevice_Expecter) Close() *MockEvdevDevice_Close_Call {
+	return &MockEvdevDevice_Close_Call{Call: _e.mock.On("Close")}
+}
+
+func (_c *MockEvdevDevice_Close_Call) Run(run func()) *MockEvdevDevice_Close_Call {
+	_c.Call.Run(func(args mock.Arguments) {
+		run()
+	})
+	return _c
+}
+
+func (_c *MockEvdevDevice_Close_Call) Return(_a0 error) *MockEvdevDevice_Close_Call {
+	_c.Call.Return(_a0)
+	return _c
+}
+
+func (_c *MockEvdevDevice_Close_Call) RunAndReturn(run func() error) *MockEvdevDevice_Close_Call {
+	_c.Call.Return(run)
+	return _c
+}
+
+// Name provides a mock function with no fields
+func (_m *MockEvdevDevice) Name() (string, error) {
+	ret := _m.Called()
+
+	if len(ret) == 0 {
+		panic("no return value specified for Name")
+	}
+
+	var r0 string
+	var r1 error
+	if rf, ok := ret.Get(0).(func() (string, error)); ok {
+		return rf()
+	}
+	if rf, ok := ret.Get(0).(func() string); ok {
+		r0 = rf()
+	} else {
+		r0 = ret.Get(0).(string)
+	}
+
+	if rf, ok := ret.Get(1).(func() error); ok {
+		r1 = rf()
+	} else {
+		r1 = ret.Error(1)
+	}
+
+	return r0, r1
+}
+
+// MockEvdevDevice_Name_Call is a *mock.Call that shadows Run/Return methods with type explicit version for method 'Name'
+type MockEvdevDevice_Name_Call struct {
+	*mock.Call
+}
+
+// Name is a helper method to define mock.On call
+func (_e *MockEvdevDevice_Expecter) Name() *MockEvdevDevice_Name_Call {
+	return &MockEvdevDevice_Name_Call{Call: _e.mock.On("Name")}
+}
+
+func (_c *MockEvdevDevice_Name_Call) Run(run func()) *MockEvdevDevice_Name_Call {
+	_c.Call.Run(func(args mock.Arguments) {
+		run()
+	})
+	return _c
+}
+
+func (_c *MockEvdevDevice_Name_Call) Return(_a0 string, _a1 error) *MockEvdevDevice_Name_Call {
+	_c.Call.Return(_a0, _a1)
+	return _c
+}
+
+func (_c *MockEvdevDevice_Name_Call) RunAndReturn(run func() (string, error)) *MockEvdevDevice_Name_Call {
+	_c.Call.Return(run)
+	return _c
+}
+
+// Path provides a mock function with no fields
+func (_m *MockEvdevDevice) Path() string {
+	ret := _m.Called()
+
+	if len(ret) == 0 {
+		panic("no return value specified for Path")
+	}
+
+	var r0 string
+	if rf, ok := ret.Get(0).(func() string); ok {
+		r0 = rf()
+	} else {
+		r0 = ret.Get(0).(string)
+	}
+
+	return r0
+}
+
+// MockEvdevDevice_Path_Call is a *mock.Call that shadows Run/Return methods with type explicit version for method 'Path'
+type MockEvdevDevice_Path_Call struct {
+	*mock.Call
+}
+
+// Path is a helper method to define mock.On call
+func (_e *MockEvdevDevice_Expecter) Path() *MockEvdevDevice_Path_Call {
+	return &MockEvdevDevice_Path_Call{Call: _e.mock.On("Path")}
+}
+
+func (_c *MockEvdevDevice_Path_Call) Run(run func()) *MockEvdevDevice_Path_Call {
+	_c.Call.Run(func(args mock.Arguments) {
+		run()
+	})
+	return _c
+}
+
+func (_c *MockEvdevDevice_Path_Call) Return(_a0 string) *MockEvdevDevice_Path_Call {
+	_c.Call.Return(_a0)
+	return _c
+}
+
+func (_c *MockEvdevDevice_Path_Call) RunAndReturn(run func() string) *MockEvdevDevice_Path_Call {
+	_c.Call.Return(run)
+	return _c
+}
+
+// ReadOne provides a mock function with no fields
+func (_m *MockEvdevDevice) ReadOne() (*go_evdev.InputEvent, error) {
+	ret := _m.Called()
+
+	if len(ret) == 0 {
+		panic("no return value specified for ReadOne")
+	}
+
+	var r0 *go_evdev.InputEvent
+	var r1 error
+	if rf, ok := ret.Get(0).(func() (*go_evdev.InputEvent, error)); ok {
+		return rf()
+	}
+	if rf, ok := ret.Get(0).(func() *go_evdev.InputEvent); ok {
+		r0 = rf()
+	} else {
+		if ret.Get(0) != nil {
+			r0 = ret.Get(0).(*go_evdev.InputEvent)
+		}
+	}
+
+	if rf, ok := ret.Get(1).(func() error); ok {
+		r1 = rf()
+	} else {
+		r1 = ret.Error(1)
+	}
+
+	return r0, r1
+}
+
+// MockEvdevDevice_ReadOne_Call is a *mock.Call that shadows Run/Return methods with type explicit version for method 'ReadOne'
+type MockEvdevDevice_ReadOne_Call struct {
+	*mock.Call
+}
+
+// ReadOne is a helper method to define mock.On call
+func (_e *MockEvdevDevice_Expecter) ReadOne() *MockEvdevDevice_ReadOne_Call {
+	return &MockEvdevDevice_ReadOne_Call{Call: _e.mock.On("ReadOne")}
+}
+
+func (_c *MockEvdevDevice_ReadOne_Call) Run(run func()) *MockEvdevDevice_ReadOne_Call {
+	_c.Call.Run(func(args mock.Arguments) {
+		run()
+	})
+	return _c
+}
+
+func (_c *MockEvdevDevice_ReadOne_Call) Return(_a0 *go_evdev.InputEvent, _a1 error) *MockEvdevDevice_ReadOne_Call {
+	_c.Call.Return(_a0, _a1)
+	return _c
+}
+
+func (_c *MockEvdevDevice_ReadOne_Call) RunAndReturn(run func() (*go_evdev.InputEvent, error)) *MockEvdevDevice_ReadOne_Call {
+	_c.Call.Return(run)
+	return _c
+}
+
+// State provides a mock function with given fields: t
+func (_m *MockEvdevDevice) State(t go_evdev.EvType) (go_evdev.StateMap, error) {
+	ret := _m.Called(t)
+
+	if len(ret) == 0 {
+		panic("no return value specified for State")
+	}
+
+	var r0 go_evdev.StateMap
+	var r1 error
+	if rf, ok := ret.Get(0).(func(go_evdev.EvType) (go_evdev.StateMap, error)); ok {
+		return rf(t)
+	}
+	if rf, ok := ret.Get(0).(func(go_evdev.EvType) go_evdev.StateMap); ok {
+		r0 = rf(t)
+	} else {
+		if ret.Get(0) != nil {
+			r0 = ret.Get(0).(go_evdev.StateMap)
+		}
+	}
+
+	if rf, ok := ret.Get(1).(func(go_evdev.EvType) error); ok {
+		r1 = rf(t)
+	} else {
+		r1 = ret.Error(1)
+	}
+
+	return r0, r1
+}
+
+// MockEvdevDevice_State_Call is a *mock.Call that shadows Run/Return methods with type explicit version for method 'State'
+type MockEvdevDevice_State_Call struct {
+	*mock.Call
+}
+
+// State is a helper method to define mock.On call
+//   - t go_evdev.EvType
+func (_e *MockEvdevDevice_Expecter) State(t interface{}) *MockEvdevDevice_State_Call {
+	return &MockEvdevDevice_State_Call{Call: _e.mock.On("State", t)}
+}
+
+func (_c *MockEvdevDevice_State_Call) Run(run func(t go_evdev.EvType)) *MockEvdevDevice_State_Call {
+	_c.Call.Run(func(args mock.Arguments) {
+		run(args[0].(go_evdev.EvType))
+	})
+	return _c
+}
+
+func (_c *MockEvdevDevice_State_Call) Return(_a0 go_evdev.StateMap, _a1 error) *MockEvdevDevice_State_Call {
+	_c.Call.Return(_a0, _a1)
+	return _c
+}
+
+func (_c *MockEvdevDevice_State_Call) RunAndReturn(run func(go_evdev.EvType) (go_evdev.StateMap, error)) *MockEvdevDevice_State_Call {
+	_c.Call.Return(run)
+	return _c
+}
+
+// NewMockEvdevDevice creates a new instance of MockEvdevDevice. It also registers a testing interface on the mock and a cleanup function to assert the mocks expectations.
+// The first argument is typically a *testing.T value.
+func NewMockEvdevDevice(t interface {
+	mock.TestingT
+	Cleanup(func())
+}) *MockEvdevDevice {
+	mock := &MockEvdevDevice{}
+	mock.Mock.Test(t)
+
+	t.Cleanup(func() { mock.AssertExpectations(t) })
+
+	return mock
+}

core/internal/server/evdev/handlers.go

@@ -0,0 +1,27 @@
+package evdev
+
+import (
+	"net"
+
+	"github.com/AvengeMedia/DankMaterialShell/core/internal/server/models"
+)
+
+type Request struct {
+	ID     interface{}            `json:"id"`
+	Method string                 `json:"method"`
+	Params map[string]interface{} `json:"params"`
+}
+
+func HandleRequest(conn net.Conn, req Request, m *Manager) {
+	switch req.Method {
+	case "evdev.getState":
+		handleGetState(conn, req, m)
+	default:
+		models.RespondError(conn, req.ID.(int), "unknown method: "+req.Method)
+	}
+}
+
+func handleGetState(conn net.Conn, req Request, m *Manager) {
+	state := m.GetState()
+	models.Respond(conn, req.ID.(int), state)
+}

core/internal/server/evdev/handlers_test.go

@@ -0,0 +1,133 @@
+package evdev
+
+import (
+	"bytes"
+	"encoding/json"
+	"errors"
+	"net"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+
+	mocks "github.com/AvengeMedia/DankMaterialShell/core/internal/mocks/evdev"
+	"github.com/AvengeMedia/DankMaterialShell/core/internal/server/models"
+)
+
+type mockNetConn struct {
+	net.Conn
+	readBuf  *bytes.Buffer
+	writeBuf *bytes.Buffer
+	closed   bool
+}
+
+func newMockNetConn() *mockNetConn {
+	return &mockNetConn{
+		readBuf:  &bytes.Buffer{},
+		writeBuf: &bytes.Buffer{},
+	}
+}
+
+func (m *mockNetConn) Read(b []byte) (n int, err error) {
+	return m.readBuf.Read(b)
+}
+
+func (m *mockNetConn) Write(b []byte) (n int, err error) {
+	return m.writeBuf.Write(b)
+}
+
+func (m *mockNetConn) Close() error {
+	m.closed = true
+	return nil
+}
+
+func TestHandleRequest(t *testing.T) {
+	t.Run("getState request", func(t *testing.T) {
+		mockDevice := mocks.NewMockEvdevDevice(t)
+		mockDevice.EXPECT().ReadOne().Return(nil, errors.New("test")).Maybe()
+
+		m := &Manager{
+			device:      mockDevice,
+			state:       State{Available: true, CapsLock: true},
+			subscribers: make(map[string]chan State),
+			closeChan:   make(chan struct{}),
+		}
+
+		conn := newMockNetConn()
+		req := Request{
+			ID:     123,
+			Method: "evdev.getState",
+			Params: map[string]interface{}{},
+		}
+
+		HandleRequest(conn, req, m)
+
+		var resp models.Response[State]
+		err := json.NewDecoder(conn.writeBuf).Decode(&resp)
+		require.NoError(t, err)
+
+		assert.Equal(t, 123, resp.ID)
+		assert.NotNil(t, resp.Result)
+		assert.True(t, resp.Result.Available)
+		assert.True(t, resp.Result.CapsLock)
+	})
+
+	t.Run("unknown method", func(t *testing.T) {
+		mockDevice := mocks.NewMockEvdevDevice(t)
+		mockDevice.EXPECT().ReadOne().Return(nil, errors.New("test")).Maybe()
+
+		m := &Manager{
+			device:      mockDevice,
+			state:       State{Available: true, CapsLock: false},
+			subscribers: make(map[string]chan State),
+			closeChan:   make(chan struct{}),
+		}
+
+		conn := newMockNetConn()
+		req := Request{
+			ID:     456,
+			Method: "evdev.unknownMethod",
+			Params: map[string]interface{}{},
+		}
+
+		HandleRequest(conn, req, m)
+
+		var resp models.Response[any]
+		err := json.NewDecoder(conn.writeBuf).Decode(&resp)
+		require.NoError(t, err)
+
+		assert.Equal(t, 456, resp.ID)
+		assert.NotEmpty(t, resp.Error)
+		assert.Contains(t, resp.Error, "unknown method")
+	})
+}
+
+func TestHandleGetState(t *testing.T) {
+	mockDevice := mocks.NewMockEvdevDevice(t)
+	mockDevice.EXPECT().ReadOne().Return(nil, errors.New("test")).Maybe()
+
+	m := &Manager{
+		device:      mockDevice,
+		state:       State{Available: true, CapsLock: false},
+		subscribers: make(map[string]chan State),
+		closeChan:   make(chan struct{}),
+	}
+
+	conn := newMockNetConn()
+	req := Request{
+		ID:     789,
+		Method: "evdev.getState",
+		Params: map[string]interface{}{},
+	}
+
+	handleGetState(conn, req, m)
+
+	var resp models.Response[State]
+	err := json.NewDecoder(conn.writeBuf).Decode(&resp)
+	require.NoError(t, err)
+
+	assert.Equal(t, 789, resp.ID)
+	assert.NotNil(t, resp.Result)
+	assert.True(t, resp.Result.Available)
+	assert.False(t, resp.Result.CapsLock)
+}

core/internal/server/evdev/manager.go

@@ -0,0 +1,256 @@
+package evdev
+
+import (
+	"fmt"
+	"os"
+	"path/filepath"
+	"strings"
+	"sync"
+	"time"
+
+	"github.com/AvengeMedia/DankMaterialShell/core/internal/log"
+	evdev "github.com/holoplot/go-evdev"
+)
+
+const (
+	evKeyType      = 0x01
+	evLedType      = 0x11
+	keyCapslockKey = 58
+	ledCapslockKey = 1
+	keyStateOn     = 1
+)
+
+type EvdevDevice interface {
+	Name() (string, error)
+	Path() string
+	Close() error
+	ReadOne() (*evdev.InputEvent, error)
+	State(t evdev.EvType) (evdev.StateMap, error)
+}
+
+type Manager struct {
+	device      EvdevDevice
+	state       State
+	stateMutex  sync.RWMutex
+	subscribers map[string]chan State
+	subMutex    sync.RWMutex
+	closeChan   chan struct{}
+	closeOnce   sync.Once
+}
+
+func NewManager() (*Manager, error) {
+	device, err := findKeyboard()
+	if err != nil {
+		return nil, fmt.Errorf("failed to find keyboard: %w", err)
+	}
+
+	initialCapsLock := readInitialCapsLockState(device)
+
+	m := &Manager{
+		device:      device,
+		state:       State{Available: true, CapsLock: initialCapsLock},
+		subscribers: make(map[string]chan State),
+		closeChan:   make(chan struct{}),
+	}
+
+	go m.monitorCapsLock()
+
+	return m, nil
+}
+
+func readInitialCapsLockState(device EvdevDevice) bool {
+	ledStates, err := device.State(evLedType)
+	if err != nil {
+		log.Debugf("Could not read LED state: %v", err)
+		return false
+	}
+
+	return ledStates[ledCapslockKey]
+}
+
+func findKeyboard() (EvdevDevice, error) {
+	pattern := "/dev/input/event*"
+	matches, err := filepath.Glob(pattern)
+	if err != nil {
+		return nil, fmt.Errorf("failed to glob input devices: %w", err)
+	}
+
+	if len(matches) == 0 {
+		return nil, fmt.Errorf("no input devices found")
+	}
+
+	for _, path := range matches {
+		device, err := evdev.Open(path)
+		if err != nil {
+			continue
+		}
+
+		if isKeyboard(device) {
+			deviceName, _ := device.Name()
+			log.Debugf("Found keyboard: %s at %s", deviceName, path)
+			return device, nil
+		}
+
+		device.Close()
+	}
+
+	return nil, fmt.Errorf("no keyboard device found")
+}
+
+func isKeyboard(device EvdevDevice) bool {
+	deviceName, err := device.Name()
+	if err != nil {
+		return false
+	}
+
+	name := strings.ToLower(deviceName)
+
+	switch {
+	case strings.Contains(name, "keyboard"):
+		return true
+	case strings.Contains(name, "kbd"):
+		return true
+	case strings.Contains(name, "input") && strings.Contains(name, "key"):
+		return true
+	default:
+		return false
+	}
+}
+
+func (m *Manager) monitorCapsLock() {
+	defer func() {
+		if r := recover(); r != nil {
+			log.Errorf("Panic in evdev monitor: %v", r)
+		}
+	}()
+
+	for {
+		select {
+		case <-m.closeChan:
+			return
+		default:
+		}
+
+		event, err := m.device.ReadOne()
+		if err != nil {
+			if !isClosedError(err) {
+				log.Warnf("Failed to read evdev event: %v", err)
+			}
+			time.Sleep(100 * time.Millisecond)
+			continue
+		}
+
+		if event == nil {
+			continue
+		}
+
+		if event.Type == evKeyType && event.Code == keyCapslockKey && event.Value == keyStateOn {
+			m.toggleCapsLock()
+		}
+	}
+}
+
+func isClosedError(err error) bool {
+	if err == nil {
+		return false
+	}
+
+	errStr := err.Error()
+	switch {
+	case strings.Contains(errStr, "closed"):
+		return true
+	case strings.Contains(errStr, "bad file descriptor"):
+		return true
+	default:
+		return false
+	}
+}
+
+func (m *Manager) toggleCapsLock() {
+	m.stateMutex.Lock()
+	m.state.CapsLock = !m.state.CapsLock
+	newState := m.state
+	m.stateMutex.Unlock()
+
+	log.Debugf("Caps lock toggled: %v", newState.CapsLock)
+	m.notifySubscribers(newState)
+}
+
+func (m *Manager) GetState() State {
+	m.stateMutex.RLock()
+	defer m.stateMutex.RUnlock()
+	return m.state
+}
+
+func (m *Manager) Subscribe(id string) chan State {
+	m.subMutex.Lock()
+	defer m.subMutex.Unlock()
+
+	ch := make(chan State, 16)
+	m.subscribers[id] = ch
+	return ch
+}
+
+func (m *Manager) Unsubscribe(id string) {
+	m.subMutex.Lock()
+	defer m.subMutex.Unlock()
+
+	if ch, ok := m.subscribers[id]; ok {
+		close(ch)
+		delete(m.subscribers, id)
+	}
+}
+
+func (m *Manager) notifySubscribers(state State) {
+	m.subMutex.RLock()
+	defer m.subMutex.RUnlock()
+
+	for _, ch := range m.subscribers {
+		select {
+		case ch <- state:
+		default:
+		}
+	}
+}
+
+func (m *Manager) Close() {
+	m.closeOnce.Do(func() {
+		close(m.closeChan)
+
+		if m.device != nil {
+			if err := m.device.Close(); err != nil && !isClosedError(err) {
+				log.Warnf("Error closing evdev device: %v", err)
+			}
+		}
+
+		m.subMutex.Lock()
+		for id, ch := range m.subscribers {
+			close(ch)
+			delete(m.subscribers, id)
+		}
+		m.subMutex.Unlock()
+	})
+}
+
+func InitializeManager() (*Manager, error) {
+	if os.Getuid() != 0 && !hasInputGroupAccess() {
+		return nil, fmt.Errorf("insufficient permissions to access input devices")
+	}
+
+	return NewManager()
+}
+
+func hasInputGroupAccess() bool {
+	pattern := "/dev/input/event*"
+	matches, err := filepath.Glob(pattern)
+	if err != nil || len(matches) == 0 {
+		return false
+	}
+
+	testFile, err := os.Open(matches[0])
+	if err != nil {
+		return false
+	}
+	testFile.Close()
+	return true
+}

core/internal/server/evdev/manager_test.go

@@ -0,0 +1,314 @@
+package evdev
+
+import (
+	"errors"
+	"testing"
+
+	evdev "github.com/holoplot/go-evdev"
+	"github.com/stretchr/testify/assert"
+
+	mocks "github.com/AvengeMedia/DankMaterialShell/core/internal/mocks/evdev"
+)
+
+func TestManager_Creation(t *testing.T) {
+	t.Run("manager created successfully with caps lock off", func(t *testing.T) {
+		mockDevice := mocks.NewMockEvdevDevice(t)
+		mockDevice.EXPECT().ReadOne().Return(nil, errors.New("test")).Maybe()
+
+		m := &Manager{
+			device:      mockDevice,
+			state:       State{Available: true, CapsLock: false},
+			subscribers: make(map[string]chan State),
+			closeChan:   make(chan struct{}),
+		}
+
+		assert.NotNil(t, m)
+		assert.True(t, m.state.Available)
+		assert.False(t, m.state.CapsLock)
+	})
+
+	t.Run("manager created successfully with caps lock on", func(t *testing.T) {
+		mockDevice := mocks.NewMockEvdevDevice(t)
+		mockDevice.EXPECT().ReadOne().Return(nil, errors.New("test")).Maybe()
+
+		m := &Manager{
+			device:      mockDevice,
+			state:       State{Available: true, CapsLock: true},
+			subscribers: make(map[string]chan State),
+			closeChan:   make(chan struct{}),
+		}
+
+		assert.NotNil(t, m)
+		assert.True(t, m.state.Available)
+		assert.True(t, m.state.CapsLock)
+	})
+}
+
+func TestManager_GetState(t *testing.T) {
+	mockDevice := mocks.NewMockEvdevDevice(t)
+	mockDevice.EXPECT().ReadOne().Return(nil, errors.New("test")).Maybe()
+
+	m := &Manager{
+		device:      mockDevice,
+		state:       State{Available: true, CapsLock: false},
+		subscribers: make(map[string]chan State),
+		closeChan:   make(chan struct{}),
+	}
+
+	state := m.GetState()
+	assert.True(t, state.Available)
+	assert.False(t, state.CapsLock)
+}
+
+func TestManager_Subscribe(t *testing.T) {
+	mockDevice := mocks.NewMockEvdevDevice(t)
+	mockDevice.EXPECT().ReadOne().Return(nil, errors.New("test")).Maybe()
+
+	m := &Manager{
+		device:      mockDevice,
+		state:       State{Available: true, CapsLock: false},
+		subscribers: make(map[string]chan State),
+		closeChan:   make(chan struct{}),
+	}
+
+	ch := m.Subscribe("test-client")
+	assert.NotNil(t, ch)
+	assert.Len(t, m.subscribers, 1)
+}
+
+func TestManager_Unsubscribe(t *testing.T) {
+	mockDevice := mocks.NewMockEvdevDevice(t)
+	mockDevice.EXPECT().ReadOne().Return(nil, errors.New("test")).Maybe()
+
+	m := &Manager{
+		device:      mockDevice,
+		state:       State{Available: true, CapsLock: false},
+		subscribers: make(map[string]chan State),
+		closeChan:   make(chan struct{}),
+	}
+
+	ch := m.Subscribe("test-client")
+	assert.Len(t, m.subscribers, 1)
+
+	m.Unsubscribe("test-client")
+	assert.Len(t, m.subscribers, 0)
+
+	select {
+	case _, ok := <-ch:
+		assert.False(t, ok, "channel should be closed")
+	default:
+		t.Error("channel should be closed")
+	}
+}
+
+func TestManager_ToggleCapsLock(t *testing.T) {
+	mockDevice := mocks.NewMockEvdevDevice(t)
+	mockDevice.EXPECT().ReadOne().Return(nil, errors.New("test")).Maybe()
+
+	m := &Manager{
+		device:      mockDevice,
+		state:       State{Available: true, CapsLock: false},
+		subscribers: make(map[string]chan State),
+		closeChan:   make(chan struct{}),
+	}
+
+	ch := m.Subscribe("test-client")
+
+	go func() {
+		m.toggleCapsLock()
+	}()
+
+	newState := <-ch
+	assert.True(t, newState.CapsLock)
+
+	go func() {
+		m.toggleCapsLock()
+	}()
+
+	newState = <-ch
+	assert.False(t, newState.CapsLock)
+}
+
+func TestManager_Close(t *testing.T) {
+	mockDevice := mocks.NewMockEvdevDevice(t)
+	mockDevice.EXPECT().Close().Return(nil).Once()
+	mockDevice.EXPECT().ReadOne().Return(nil, errors.New("test")).Maybe()
+
+	m := &Manager{
+		device:      mockDevice,
+		state:       State{Available: true, CapsLock: false},
+		subscribers: make(map[string]chan State),
+		closeChan:   make(chan struct{}),
+	}
+
+	ch1 := m.Subscribe("client1")
+	ch2 := m.Subscribe("client2")
+
+	m.Close()
+
+	select {
+	case _, ok := <-ch1:
+		assert.False(t, ok, "channel 1 should be closed")
+	default:
+		t.Error("channel 1 should be closed")
+	}
+
+	select {
+	case _, ok := <-ch2:
+		assert.False(t, ok, "channel 2 should be closed")
+	default:
+		t.Error("channel 2 should be closed")
+	}
+
+	assert.Len(t, m.subscribers, 0)
+
+	m.Close()
+}
+
+func TestIsKeyboard(t *testing.T) {
+	tests := []struct {
+		name     string
+		devName  string
+		expected bool
+	}{
+		{"keyboard in name", "AT Translated Set 2 keyboard", true},
+		{"kbd in name", "USB kbd", true},
+		{"input and key", "input key device", true},
+		{"random device", "Mouse", false},
+		{"empty name", "", false},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			mockDevice := mocks.NewMockEvdevDevice(t)
+			mockDevice.EXPECT().Name().Return(tt.devName, nil).Once()
+
+			result := isKeyboard(mockDevice)
+			assert.Equal(t, tt.expected, result)
+		})
+	}
+}
+
+func TestIsKeyboard_ErrorHandling(t *testing.T) {
+	mockDevice := mocks.NewMockEvdevDevice(t)
+	mockDevice.EXPECT().Name().Return("", errors.New("device error")).Once()
+
+	result := isKeyboard(mockDevice)
+	assert.False(t, result)
+}
+
+func TestManager_MonitorCapsLock(t *testing.T) {
+	t.Run("caps lock key press toggles state", func(t *testing.T) {
+		mockDevice := mocks.NewMockEvdevDevice(t)
+
+		capsLockEvent := &evdev.InputEvent{
+			Type:  evKeyType,
+			Code:  keyCapslockKey,
+			Value: keyStateOn,
+		}
+
+		mockDevice.EXPECT().ReadOne().Return(capsLockEvent, nil).Once()
+		mockDevice.EXPECT().ReadOne().Return(nil, errors.New("stop")).Maybe()
+		mockDevice.EXPECT().Close().Return(nil).Maybe()
+
+		m := &Manager{
+			device:      mockDevice,
+			state:       State{Available: true, CapsLock: false},
+			subscribers: make(map[string]chan State),
+			closeChan:   make(chan struct{}),
+		}
+
+		ch := m.Subscribe("test")
+
+		go m.monitorCapsLock()
+
+		state := <-ch
+		assert.True(t, state.CapsLock)
+
+		m.Close()
+	})
+}
+
+func TestIsClosedError(t *testing.T) {
+	tests := []struct {
+		name     string
+		err      error
+		expected bool
+	}{
+		{"nil error", nil, false},
+		{"closed error", errors.New("device closed"), true},
+		{"bad file descriptor", errors.New("bad file descriptor"), true},
+		{"other error", errors.New("some other error"), false},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			result := isClosedError(tt.err)
+			assert.Equal(t, tt.expected, result)
+		})
+	}
+}
+
+func TestNotifySubscribers(t *testing.T) {
+	mockDevice := mocks.NewMockEvdevDevice(t)
+	mockDevice.EXPECT().ReadOne().Return(nil, errors.New("test")).Maybe()
+	mockDevice.EXPECT().Close().Return(nil).Maybe()
+
+	m := &Manager{
+		device:      mockDevice,
+		state:       State{Available: true, CapsLock: false},
+		subscribers: make(map[string]chan State),
+		closeChan:   make(chan struct{}),
+	}
+
+	ch1 := m.Subscribe("client1")
+	ch2 := m.Subscribe("client2")
+
+	newState := State{Available: true, CapsLock: true}
+	go m.notifySubscribers(newState)
+
+	state1 := <-ch1
+	state2 := <-ch2
+
+	assert.Equal(t, newState, state1)
+	assert.Equal(t, newState, state2)
+
+	m.Close()
+}
+
+func TestReadInitialCapsLockState(t *testing.T) {
+	t.Run("caps lock is on", func(t *testing.T) {
+		mockDevice := mocks.NewMockEvdevDevice(t)
+		ledState := evdev.StateMap{
+			ledCapslockKey: true,
+		}
+		mockDevice.EXPECT().State(evdev.EvType(evLedType)).Return(ledState, nil).Once()
+
+		result := readInitialCapsLockState(mockDevice)
+		assert.True(t, result)
+	})
+
+	t.Run("caps lock is off", func(t *testing.T) {
+		mockDevice := mocks.NewMockEvdevDevice(t)
+		ledState := evdev.StateMap{
+			ledCapslockKey: false,
+		}
+		mockDevice.EXPECT().State(evdev.EvType(evLedType)).Return(ledState, nil).Once()
+
+		result := readInitialCapsLockState(mockDevice)
+		assert.False(t, result)
+	})
+
+	t.Run("error reading LED state", func(t *testing.T) {
+		mockDevice := mocks.NewMockEvdevDevice(t)
+		mockDevice.EXPECT().State(evdev.EvType(evLedType)).Return(nil, errors.New("read error")).Once()
+
+		result := readInitialCapsLockState(mockDevice)
+		assert.False(t, result)
+	})
+}
+
+func TestHasInputGroupAccess(t *testing.T) {
+	result := hasInputGroupAccess()
+	t.Logf("hasInputGroupAccess: %v", result)
+}

core/internal/server/evdev/models.go

@@ -0,0 +1,6 @@
+package evdev
+
+type State struct {
+	Available bool `json:"available"`
+	CapsLock  bool `json:"capsLock"`
+}

core/internal/server/router.go

@@ -9,6 +9,7 @@ import (
 	"github.com/AvengeMedia/DankMaterialShell/core/internal/server/brightness"
 	"github.com/AvengeMedia/DankMaterialShell/core/internal/server/cups"
 	"github.com/AvengeMedia/DankMaterialShell/core/internal/server/dwl"
+	"github.com/AvengeMedia/DankMaterialShell/core/internal/server/evdev"
 	"github.com/AvengeMedia/DankMaterialShell/core/internal/server/extworkspace"
 	"github.com/AvengeMedia/DankMaterialShell/core/internal/server/freedesktop"
 	"github.com/AvengeMedia/DankMaterialShell/core/internal/server/loginctl"
@@ -165,6 +166,20 @@ func RouteRequest(conn net.Conn, req models.Request) {
 		return
 	}
 
+	if strings.HasPrefix(req.Method, "evdev.") {
+		if evdevManager == nil {
+			models.RespondError(conn, req.ID, "evdev manager not initialized")
+			return
+		}
+		evdevReq := evdev.Request{
+			ID:     req.ID,
+			Method: req.Method,
+			Params: req.Params,
+		}
+		evdev.HandleRequest(conn, evdevReq, evdevManager)
+		return
+	}
+
 	switch req.Method {
 	case "ping":
 		models.Respond(conn, req.ID, "pong")

core/internal/server/server.go

@@ -18,6 +18,7 @@ import (
 	"github.com/AvengeMedia/DankMaterialShell/core/internal/server/brightness"
 	"github.com/AvengeMedia/DankMaterialShell/core/internal/server/cups"
 	"github.com/AvengeMedia/DankMaterialShell/core/internal/server/dwl"
+	"github.com/AvengeMedia/DankMaterialShell/core/internal/server/evdev"
 	"github.com/AvengeMedia/DankMaterialShell/core/internal/server/extworkspace"
 	"github.com/AvengeMedia/DankMaterialShell/core/internal/server/freedesktop"
 	"github.com/AvengeMedia/DankMaterialShell/core/internal/server/loginctl"
@@ -28,7 +29,7 @@ import (
 	"github.com/AvengeMedia/DankMaterialShell/core/internal/server/wlroutput"
 )
 
-const APIVersion = 17
+const APIVersion = 18
 
 type Capabilities struct {
 	Capabilities []string `json:"capabilities"`
@@ -54,6 +55,7 @@ var dwlManager *dwl.Manager
 var extWorkspaceManager *extworkspace.Manager
 var brightnessManager *brightness.Manager
 var wlrOutputManager *wlroutput.Manager
+var evdevManager *evdev.Manager
 var wlContext *wlcontext.SharedContext
 
 var capabilitySubscribers = make(map[string]chan ServerInfo)
@@ -292,6 +294,19 @@ func InitializeWlrOutputManager() error {
 	return nil
 }
 
+func InitializeEvdevManager() error {
+	manager, err := evdev.InitializeManager()
+	if err != nil {
+		log.Warnf("Failed to initialize evdev manager: %v", err)
+		return err
+	}
+
+	evdevManager = manager
+
+	log.Info("Evdev manager initialized")
+	return nil
+}
+
 func handleConnection(conn net.Conn) {
 	defer conn.Close()
 
@@ -358,6 +373,10 @@ func getCapabilities() Capabilities {
 		caps = append(caps, "wlroutput")
 	}
 
+	if evdevManager != nil {
+		caps = append(caps, "evdev")
+	}
+
 	return Capabilities{Capabilities: caps}
 }
 
@@ -404,6 +423,10 @@ func getServerInfo() ServerInfo {
 		caps = append(caps, "wlroutput")
 	}
 
+	if evdevManager != nil {
+		caps = append(caps, "evdev")
+	}
+
 	return ServerInfo{
 		APIVersion:   APIVersion,
 		Capabilities: caps,
@@ -918,6 +941,38 @@ func handleSubscribe(conn net.Conn, req models.Request) {
 		}()
 	}
 
+	if shouldSubscribe("evdev") && evdevManager != nil {
+		wg.Add(1)
+		evdevChan := evdevManager.Subscribe(clientID + "-evdev")
+		go func() {
+			defer wg.Done()
+			defer evdevManager.Unsubscribe(clientID + "-evdev")
+
+			initialState := evdevManager.GetState()
+			select {
+			case eventChan <- ServiceEvent{Service: "evdev", Data: initialState}:
+			case <-stopChan:
+				return
+			}
+
+			for {
+				select {
+				case state, ok := <-evdevChan:
+					if !ok {
+						return
+					}
+					select {
+					case eventChan <- ServiceEvent{Service: "evdev", Data: state}:
+					case <-stopChan:
+						return
+					}
+				case <-stopChan:
+					return
+				}
+			}
+		}()
+	}
+
 	go func() {
 		wg.Wait()
 		close(eventChan)
@@ -974,6 +1029,9 @@ func cleanupManagers() {
 	if wlrOutputManager != nil {
 		wlrOutputManager.Close()
 	}
+	if evdevManager != nil {
+		evdevManager.Close()
+	}
 	if wlContext != nil {
 		wlContext.Close()
 	}
@@ -1122,6 +1180,9 @@ func Start(printDocs bool) error {
 		log.Info("     - transform    : Transform value (optional)")
 		log.Info("     - scale        : Scale value (optional)")
 		log.Info("     - adaptiveSync : Adaptive sync state (optional)")
+		log.Info("Evdev:")
+		log.Info(" evdev.getState                        - Get current evdev state (caps lock)")
+		log.Info(" evdev.subscribe                       - Subscribe to evdev state changes (streaming)")
 		log.Info("")
 	}
 	log.Info("Initializing managers...")
@@ -1194,10 +1255,8 @@ func Start(printDocs bool) error {
 	fatalErrChan := make(chan error, 1)
 	if wlrOutputManager != nil {
 		go func() {
-			select {
+			err := <-wlrOutputManager.FatalError()
-			case err := <-wlrOutputManager.FatalError():
+			fatalErrChan <- fmt.Errorf("WlrOutput fatal error: %w", err)
-				fatalErrChan <- fmt.Errorf("WlrOutput fatal error: %w", err)
-			}
 		}()
 	}
 
@@ -1209,6 +1268,14 @@ func Start(printDocs bool) error {
 		}
 	}()
 
+	go func() {
+		if err := InitializeEvdevManager(); err != nil {
+			log.Debugf("Evdev manager unavailable: %v", err)
+		} else {
+			notifyCapabilityChange()
+		}
+	}()
+
 	if wlContext != nil {
 		wlContext.Start()
 		log.Info("Wayland event dispatcher started")

quickshell/DMSShell.qml

@@ -600,6 +600,14 @@ Item {
         }
     }
 
+    Variants {
+        model: SettingsData.getFilteredScreens("osd")
+
+        delegate: CapsLockOSD {
+            modelData: item
+        }
+    }
+
     LazyLoader {
         id: hyprlandOverviewLoader
         active: CompositorService.isHyprland

quickshell/Modules/Lock/LockScreenContent.qml

@@ -332,6 +332,7 @@ Item {
         }
 
         ColumnLayout {
+            id: passwordLayout
             anchors.centerIn: parent
             anchors.verticalCenterOffset: 50
             spacing: Theme.spacingM
@@ -740,6 +741,35 @@ Item {
             }
         }
 
+        Row {
+            anchors.top: passwordLayout.bottom
+            anchors.topMargin: Theme.spacingS
+            anchors.horizontalCenter: passwordLayout.horizontalCenter
+            spacing: 4
+            opacity: DMSService.capsLockState ? 1 : 0
+
+            DankIcon {
+                name: "shift_lock"
+                size: 14
+                color: Theme.error
+                anchors.verticalCenter: parent.verticalCenter
+            }
+
+            StyledText {
+                text: "Caps Lock is on"
+                font.pixelSize: Theme.fontSizeSmall
+                color: Theme.error
+                anchors.verticalCenter: parent.verticalCenter
+            }
+
+            Behavior on opacity {
+                NumberAnimation {
+                    duration: Theme.shortDuration
+                    easing.type: Theme.standardEasing
+                }
+            }
+        }
+
         StyledText {
             anchors.top: parent.top
             anchors.left: parent.left

quickshell/Modules/OSD/CapsLockOSD.qml

@@ -0,0 +1,37 @@
+import QtQuick
+import qs.Common
+import qs.Services
+import qs.Widgets
+
+DankOSD {
+    id: root
+
+    osdWidth: Theme.iconSize + Theme.spacingS * 2
+    osdHeight: Theme.iconSize + Theme.spacingS * 2
+    autoHideInterval: 2000
+    enableMouseInteraction: false
+
+    property bool lastCapsLockState: false
+
+    Connections {
+        target: DMSService
+
+        function onCapsLockStateChanged() {
+            if (lastCapsLockState !== DMSService.capsLockState) {
+                root.show()
+            }
+            lastCapsLockState = DMSService.capsLockState
+        }
+    }
+
+    Component.onCompleted: {
+        lastCapsLockState = DMSService.capsLockState
+    }
+
+    content: DankIcon {
+        anchors.centerIn: parent
+        name: DMSService.capsLockState ? "shift_lock" : "shift_lock_off"
+        size: Theme.iconSize
+        color: Theme.primary
+    }
+}

quickshell/Services/DMSService.qml

@@ -49,8 +49,11 @@ Singleton {
     signal brightnessDeviceUpdate(var device)
     signal extWorkspaceStateUpdate(var data)
     signal wlrOutputStateUpdate(var data)
+    signal evdevStateUpdate(var data)
 
-    property var activeSubscriptions: ["network", "network.credentials", "loginctl", "freedesktop", "gamma", "bluetooth", "bluetooth.pairing", "dwl", "brightness", "wlroutput"]
+    property bool capsLockState: false
+
+    property var activeSubscriptions: ["network", "network.credentials", "loginctl", "freedesktop", "gamma", "bluetooth", "bluetooth.pairing", "dwl", "brightness", "wlroutput", "evdev"]
 
     Component.onCompleted: {
         if (socketPath && socketPath.length > 0) {
@@ -349,6 +352,11 @@ Singleton {
             extWorkspaceStateUpdate(data)
         } else if (service === "wlroutput") {
             wlrOutputStateUpdate(data)
+        } else if (service === "evdev") {
+            if (data.capsLock !== undefined) {
+                capsLockState = data.capsLock
+            }
+            evdevStateUpdate(data)
         }
     }