upd to swayipc 2.1.1, use Node.Is* type predicates

* add --prev option
* sort floating_nodes to avoid skipping floating windows

.github/workflows/release.yaml

@@ -1,87 +0,0 @@
-name: build-release
-on:
-  push:
-    tags:
-      - "v*.*.*"
-
-jobs:
-  release:
-    name: Build Release Assets
-    runs-on: ubuntu-latest
-    steps:
-      - name: Checkout code
-        uses: actions/checkout@v4
-
-      - name: Set up Go
-        uses: actions/setup-go@v5
-        with:
-          go-version: 1.23.5
-
-      - name: Build the executables
-        run: ./mkrel.sh swaycycle ${{ github.ref_name}}
-
-      - name: List the executables
-        run: ls -l ./releases
-
-      - name: Upload the binaries
-        uses: svenstaro/upload-release-action@v2
-        with:
-          repo_token: ${{ secrets.GITHUB_TOKEN }}
-          tag: ${{ github.ref_name }}
-          file: ./releases/*
-          file_glob: true
-
-      - name: Build Changelog
-        id: github_release
-        uses: mikepenz/release-changelog-builder-action@v5
-        env:
-          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-        with:
-          mode: "PR"
-          configurationJson: |
-            {
-              "template": "#{{CHANGELOG}}\n\n**Full Changelog**: #{{RELEASE_DIFF}}",
-              "pr_template": "- #{{TITLE}} (##{{NUMBER}}) by #{{AUTHOR}}\n#{{BODY}}",
-              "empty_template": "- no changes",
-              "categories": [
-                {
-                    "title": "## New Features",
-                    "labels": ["add", "feature"]
-                },
-                {
-                    "title": "## Bug Fixes",
-                    "labels": ["fix", "bug", "revert"]
-                },
-                {
-                    "title": "## Documentation Enhancements",
-                    "labels": ["doc"]
-                },
-                {
-                    "title": "## Refactoring Efforts",
-                    "labels": ["refactor"]
-                },
-                {
-                    "title": "## Miscellaneus Changes",
-                    "labels": []
-                }
-              ],
-              "ignore_labels": [
-                 "duplicate", "good first issue", "help wanted", "invalid", "question", "wontfix"
-              ],
-              "label_extractor": [
-                 {
-                    "pattern": "(.) (.+)",
-                    "target": "$1"
-                 },
-                 {
-                    "pattern": "(.) (.+)",
-                    "target": "$1",
-                    "on_property": "title"
-                 }
-              ]
-            }
-    
-      - name: Create Release
-        uses: softprops/action-gh-release@v2
-        with:
-          body: ${{steps.github_release.outputs.changelog}}

.golangci.yml

@@ -0,0 +1,104 @@
+version: "2"
+
+linters:
+  enable:
+    - errcheck
+    - govet
+    - ineffassign
+    - staticcheck
+    - unused
+    - arangolint
+    - asasalint
+    - asciicheck
+    - bidichk
+    - bodyclose
+    - canonicalheader
+    - clickhouselint
+    - containedctx
+    - copyloopvar
+    - cyclop
+    - decorder
+    - dogsled
+    - dupword
+    - durationcheck
+    - embeddedstructfieldcheck
+    - errchkjson
+    - errname
+    - exhaustive
+    - exptostd
+    - fatcontext
+    - funcorder
+    - funlen
+    - ginkgolinter
+    - gocheckcompilerdirectives
+    - gochecknoinits
+    - gochecksumtype
+    - gocritic
+    - gocyclo
+    - godoclint
+    - goheader
+    - gomoddirectives
+    - gomodguard_v2
+    - goprintffuncname
+    - gosmopolitan
+    - grouper
+    - iface
+    - importas
+    - inamedparam
+    - interfacebloat
+    - intrange
+    - iotamixing
+    - lll
+    - loggercheck
+    - makezero
+    - misspell
+    - modernize
+    - nakedret
+    - nestif
+    - nilerr
+    - nilnesserr
+    - nlreturn
+    - nonamedreturns
+    - nosprintfhostport
+    - paralleltest
+    - perfsprint
+    - prealloc
+    - promlinter
+    - protogetter
+    - reassign
+    - recvcheck
+    - rowserrcheck
+    - sloglint
+    - spancheck
+    - sqlclosecheck
+    - tagalign
+    - testableexamples
+    - testifylint
+    - testpackage
+    - thelper
+    - tparallel
+    - unconvert
+    - unparam
+    - unqueryvet
+    - usestdlibvars
+    - usetesting
+    - varnamelen
+    - wastedassign
+    - whitespace
+    - wsl_v5
+    - zerologlint
+
+  settings:
+    varnamelen:
+      ignore-names:
+        - err
+        - wg
+        - mu
+        - ts
+        - to
+        - es
+        - op
+        - fd
+        - id
+        - fn
+      

.goreleaser.yaml

@@ -0,0 +1,67 @@
+# vim: set ts=2 sw=2 tw=0 fo=cnqoj
+
+version: 2
+
+before:
+  hooks:
+    - go mod tidy
+
+gitea_urls:
+  api: https://codeberg.org/api/v1
+  download: https://codeberg.org
+  
+builds:
+  - env:
+      - CGO_ENABLED=0
+    goos:
+      - linux
+      - freebsd
+    goarch:
+      - amd64
+
+archives:
+  - formats: [tar.gz]
+    # this name template makes the OS and Arch compatible with the results of `uname`.
+    name_template: >-
+      {{ .ProjectName }}_
+      {{- title .Os }}_
+      {{- if eq .Arch "amd64" }}x86_64
+      {{- else if eq .Arch "386" }}i386
+      {{- else }}{{ .Arch }}{{ end }}
+      {{- if .Arm }}v{{ .Arm }}{{ end }}_{{ .Tag }}
+    # use zip for windows archives
+    format_overrides:
+      - goos: windows
+        formats: [zip]
+      - goos: linux
+        formats: [tar.gz,binary]
+    files:
+      - src: "*.md"
+        strip_parent: true
+      - src: Makefile.dist
+        dst: Makefile
+    wrap_in_directory: true
+
+changelog:
+  sort: asc
+  filters:
+    exclude:
+      - "^docs:"
+      - "^test:"
+  groups:
+    - title: Improved
+      regexp: '^.*?(feat|add|new)(\([[:word:]]+\))??!?:.+$'
+      order: 0
+    - title: Fixed
+      regexp: '^.*?(bug|fix)(\([[:word:]]+\))??!?:.+$'
+      order: 1
+    - title: Changed
+      order: 999
+
+release:
+  header: "# Release Notes"
+  footer: >-
+
+    ---
+
+    Full Changelog: [{{ .PreviousTag }}...{{ .Tag }}](https://codeberg.org/scip/swaycycle/compare/{{ .PreviousTag }}...{{ .Tag }})

.woodpecker/build.yaml

@@ -0,0 +1,38 @@
+matrix:
+  platform:
+    - linux/amd64
+  goversion:
+    - 1.26
+  lintversion:
+    - v2.12.2
+
+labels:
+  platform: ${platform}
+    
+steps:
+  build:
+    when:
+      event: [push]
+    image: golang:${goversion}
+    commands:
+      - go get
+      - go build
+
+  linter:
+    when:
+      event: [push]
+    image: golang:${goversion}
+    commands:
+      - curl -sSfL https://raw.githubusercontent.com/golangci/golangci-lint/HEAD/install.sh | sh -s -- -b $(go env GOPATH)/bin ${lintversion}
+      - golangci-lint --version
+      - golangci-lint run ./...
+    depends_on: [build]
+
+  test:
+    when:
+      event: [push]
+    image: golang:${goversion}
+    commands:
+      - go get
+      - go test -v -cover
+    depends_on: [build,linter]

.woodpecker/release.yaml

@@ -0,0 +1,15 @@
+# build release
+
+labels:
+  platform: linux/amd64
+    
+steps:
+  goreleaser:
+    image: goreleaser/goreleaser
+    when:
+      event: [tag]
+    environment:
+      GITEA_TOKEN:
+        from_secret: DEPLOY_TOKEN
+    commands:
+      - goreleaser release --clean --verbose

Makefile

@@ -46,10 +46,7 @@ test: clean
 testlint: test lint
 
 lint:
-	golangci-lint run
+	golangci-lint run --show-stats=false
-
-lint-full:
-	golangci-lint run --enable-all --exclude-use-default --disable exhaustivestruct,exhaustruct,depguard,interfacer,deadcode,golint,structcheck,scopelint,varcheck,ifshort,maligned,nosnakecase,godot,funlen,gofumpt,cyclop,noctx,gochecknoglobals,paralleltest
 
 testfuzzy: clean
 	go test -fuzz ./... $(ARGS)

Makefile.dist

@@ -0,0 +1,18 @@
+# -*-make-*-
+
+.PHONY: install all
+
+tool   = rpn
+PREFIX = /usr/local
+UID    = root
+GID    = 0
+
+all:
+	@echo "Type 'sudo make install' to install the tool."
+	@echo "To change prefix, type 'sudo make install PREFIX=/opt'"
+
+install:
+	install -d -o $(UID) -g $(GID) $(PREFIX)/bin
+	install -d -o $(UID) -g $(GID) $(PREFIX)/share/doc
+	install -o $(UID) -g $(GID) -m 555 $(tool)  $(PREFIX)/sbin/
+	install -o $(UID) -g $(GID) -m 444 *.md $(PREFIX)/share/doc/

README.md

@@ -1,3 +1,7 @@
+[![status-badge](https://ci.codeberg.org/api/badges/15562/status.svg)](https://ci.codeberg.org/repos/15562)
+[![License](https://img.shields.io/badge/license-GPL-blue.svg)](https://codeberg.org/scip/swaycycle/raw/branch/main/LICENSE)
+[![Go Report Card](https://goreportcard.com/badge/codeberg.org/scip/epuppy)](https://goreportcard.com/report/codeberg.org/scip/swaycycle)
+
 # swaycycle
 
 Cycle through  all visible windows  on a sway[fx]  workspace including
@@ -5,12 +9,11 @@ floating  ones or  windows  in sub-containers.   So  it simulates  the
 behavior of other window managers  and desktop environments. Just bind
 the tool to `ALT-tab` and there you go.
 
-![Screenshot](https://github.com/TLINDEN/swaycycle/blob/main/.github/assets/screenshot.png)
 
 ## Installation
 
 Download  the   binary  for   your  architecture  from   the  [release
-page](https://github.com/TLINDEN/swaycycle/releases) and copy to to to
+page](https://codeberg.org/scip/swaycycle/releases) and copy to
 some location within your `$PATH`.
 
 To  build  the  tool  from  source,  checkout  the  repo  and  execute
@@ -25,6 +28,13 @@ Add such a line to your sway config file (e.g. in `$HOME/.config/sway/config`):
 bindsym $mod+Tab exec ~/bin/swaycycle
 ```
 
+You may  also add  a second key  binding to do  the reverse,  which is
+sometimes very useful:
+
+```default
+bindsym $mod+Shift+Tab exec ~/bin/swaycycle --prev
+```
+
 ## Debugging
 
 You may call `swaycycle` in a terminal window on a workspace with at
@@ -70,13 +80,13 @@ best way for me to forget to do something.
 
 In order to report a bug,  unexpected behavior, feature requests or to
 submit    a    patch,    please    open   an    issue    on    github:
-https://github.com/tlinden/swaycycle/issues.
+https://codeberg.org/scip/swaycycle/issues.
 
 ## See also
 
 - [sway-ipc(7)](https://www.mankier.com/7/sway-ipc)
 - [swaywm](https://github.com/swaywm/sway/)
-- [swayfs](https://github.com/WillPower3309/swayfx)
+- [swayfx](https://github.com/WillPower3309/swayfx)
 
 ## Copyright and license
 
@@ -88,7 +98,7 @@ T.v.Dein <tom AT vondein DOT org>
 
 ## Project homepage
 
-https://github.com/tlinden/swaycycle
+https://codeberg.org/scip/swaycycle
 
 ## Copyright and License
 

go.mod

@@ -1,15 +1,18 @@
 module swaycycle
 
-go 1.23
+go 1.26
+
+require (
+	codeberg.org/scip/swayipc/v2 v2.1.1
+	github.com/lmittmann/tint v1.1.3
+	github.com/mattn/go-isatty v0.0.24
+	github.com/spf13/pflag v1.0.10
+	github.com/tlinden/yadu v0.1.3
+)
 
 require (
-	github.com/alecthomas/repr v0.5.1 // indirect
 	github.com/fatih/color v1.16.0 // indirect
-	github.com/lmittmann/tint v1.1.2 // indirect
+	github.com/mattn/go-colorable v0.1.15 // indirect
-	github.com/mattn/go-colorable v0.1.13 // indirect
+	golang.org/x/sys v0.29.0 // indirect
-	github.com/mattn/go-isatty v0.0.20 // indirect
-	github.com/spf13/pflag v1.0.7 // indirect
-	github.com/tlinden/yadu v0.1.3 // indirect
-	golang.org/x/sys v0.14.0 // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect
 )

go.sum

@@ -1,23 +1,37 @@
-github.com/alecthomas/repr v0.5.1 h1:E3G4t2QbHTSNpPKBgMTln5KLkZHLOcU7r37J4pXBuIg=
+codeberg.org/scip/swayipc/v2 v2.1.0 h1:tBiOBOUFDOA38+acZwx4BO5Yo/VVwxbqkL+R2/zmW6c=
-github.com/alecthomas/repr v0.5.1/go.mod h1:Fr0507jx4eOXV7AlPV6AVZLYrLIuIeSOWtW57eE/O/4=
+codeberg.org/scip/swayipc/v2 v2.1.0/go.mod h1:cqicjgMgPS7tGTJgjqjSMvnLeMA+J3to/YnufcysCns=
+codeberg.org/scip/swayipc/v2 v2.1.1 h1:61MHQzzDAA4ynQ7GvaLoKSTllIvWc1Pv7+oEUAsWoVw=
+codeberg.org/scip/swayipc/v2 v2.1.1/go.mod h1:cqicjgMgPS7tGTJgjqjSMvnLeMA+J3to/YnufcysCns=
 github.com/fatih/color v1.16.0 h1:zmkK9Ngbjj+K0yRhTVONQh1p/HknKYSlNT+vZCzyokM=
 github.com/fatih/color v1.16.0/go.mod h1:fL2Sau1YI5c0pdGEVCbKQbLXB6edEj1ZgiY4NijnWvE=
 github.com/lmittmann/tint v1.1.2 h1:2CQzrL6rslrsyjqLDwD11bZ5OpLBPU+g3G/r5LSfS8w=
 github.com/lmittmann/tint v1.1.2/go.mod h1:HIS3gSy7qNwGCj+5oRjAutErFBl4BzdQP6cJZ0NfMwE=
+github.com/lmittmann/tint v1.1.3 h1:Hv4EaHWXQr+GTFnOU4VKf8UvAtZgn0VuKT+G0wFlO3I=
+github.com/lmittmann/tint v1.1.3/go.mod h1:HIS3gSy7qNwGCj+5oRjAutErFBl4BzdQP6cJZ0NfMwE=
 github.com/mattn/go-colorable v0.1.13 h1:fFA4WZxdEF4tXPZVKMLwD8oUnCTTo08duU7wxecdEvA=
 github.com/mattn/go-colorable v0.1.13/go.mod h1:7S9/ev0klgBDR4GtXTXX8a3vIGJpMovkB8vQcUbaXHg=
+github.com/mattn/go-colorable v0.1.15 h1:+u9SLTRGnXv73cEsnsmoZBom+dMU88B2M0aDcWy0/jY=
+github.com/mattn/go-colorable v0.1.15/go.mod h1:6LmQG8QLFO4G5z1gPvYEzlUgJ2wF+stgPZH1UqBm1s8=
 github.com/mattn/go-isatty v0.0.16/go.mod h1:kYGgaQfpe5nmfYZH+SKPsOc2e4SrIfOl2e/yFXSvRLM=
 github.com/mattn/go-isatty v0.0.20 h1:xfD0iDuEKnDkl03q4limB+vH+GxLEtL/jb4xVJSWWEY=
 github.com/mattn/go-isatty v0.0.20/go.mod h1:W+V8PltTTMOvKvAeJH7IuucS94S2C6jfK/D7dTCTo3Y=
+github.com/mattn/go-isatty v0.0.24 h1:tGZZoVgT/KiqK1c8ocVLeDS8BSWMRd47J3Lbz7vsReI=
+github.com/mattn/go-isatty v0.0.24/go.mod h1:nMCL3Zebbrt45jsMDgnfIwz6ydEQApk5oEI3HqDio6A=
 github.com/spf13/pflag v1.0.7 h1:vN6T9TfwStFPFM5XzjsvmzZkLuaLX+HS+0SeFLRgU6M=
 github.com/spf13/pflag v1.0.7/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/tlinden/swayipc v0.3.0 h1:hGNWeEZUZIHfeP+MxpAKsUzPf3YSJ0FYX2XEu/yqNXA=
+github.com/tlinden/swayipc v0.3.0/go.mod h1:JwlMIC7eBwV8soCt2UDqlAyBudobLo07ZvepIA0irY8=
 github.com/tlinden/yadu v0.1.3 h1:5cRCUmj+l5yvlM2irtpFBIJwVV2DPEgYSaWvF19FtcY=
 github.com/tlinden/yadu v0.1.3/go.mod h1:l3bRmHKL9zGAR6pnBHY2HRPxBecf7L74BoBgOOpTcUA=
 golang.org/x/sys v0.0.0-20220811171246-fbc7d0a398ab/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.6.0 h1:MVltZSvRTcU2ljQOhs94SXPftV6DCNnZViHeQps87pQ=
 golang.org/x/sys v0.6.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.14.0 h1:Vz7Qs629MkJkGyHxUlRHizWJRG2j8fbQKjELVSNhy7Q=
 golang.org/x/sys v0.14.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
+golang.org/x/sys v0.29.0 h1:TPYlXGxvx1MGTn2GiZDhnjPA9wZzZeGKHHmKhHYvgaU=
+golang.org/x/sys v0.29.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
 gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

main.go

@@ -1,5 +1,5 @@
 /*
-Copyright © 2025 Thomas von Dein
+Copyright © 2025-2026 Thomas von Dein
 
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
@@ -18,17 +18,16 @@ along with this program. If not, see <http://www.gnu.org/licenses/>.
 package main
 
 import (
-	"encoding/binary"
+	"errors"
-	"encoding/hex"
-	"encoding/json"
 	"fmt"
 	"io"
 	"log"
 	"log/slog"
-	"net"
 	"os"
 	"runtime/debug"
+	"sort"
 
+	"codeberg.org/scip/swayipc/v2"
 	"github.com/lmittmann/tint"
 	"github.com/mattn/go-isatty"
 	"github.com/tlinden/yadu"
@@ -36,48 +35,19 @@ import (
 	flag "github.com/spf13/pflag"
 )
 
-type Node struct {
-	Id                int    `json:"id"`
-	Nodetype          string `json:"type"` // output, workspace or container
-	Name              string `json:"name"` // workspace number or app name
-	Nodes             []Node `json:"nodes"`
-	FloatingNodes     []Node `json:"floating_nodes"`
-	Focused           bool   `json:"focused"`
-	Window            int    `json:"window"` // wayland native
-	X11Window         string `json:"app_id"` // x11 compat
-	Current_workspace string `json:"current_workspace"`
-}
-
-type Response struct {
-	Success    bool   `json:"success"`
-	ParseError bool   `json:"parse_error"`
-	Error      string `json:"error"`
-}
-
 const (
-	root = iota + 1
-	output
-	workspace
-	con
-	floating
-
 	LevelNotice = slog.Level(2)
 
-	VERSION = "v0.2.0"
+	VERSION = "v0.3.3"
-
-	IPC_HEADER_SIZE = 14
-	IPC_MAGIC       = "i3-ipc"
-
-	// message types
-	IPC_GET_TREE    = 4
-	IPC_RUN_COMMAND = 0
 )
 
 var (
-	Visibles         = []Node{}
+	Visibles         = []*swayipc.Node{}
 	CurrentWorkspace = ""
+	Previous         = false
 	Debug            = false
 	Dumptree         = false
+	Dumpvisibles     = false
 	Version          = false
 	Verbose          = false
 	Notswitch        = false
@@ -90,19 +60,22 @@ const Usage string = `This is swaycycle - cycle focus through all visible window
 Usage: swaycycle [-vdDn] [-l <log>]
 
 Options:
+  -p, --prev             cycle backward
   -n, --no-switch        do not switch windows
   -d, --debug            enable debugging
   -D, --dump             dump the sway tree (needs -d as well)
+      --dump-visibles    dump a list of visible windows on current workspace (needs -d)
   -l, --logfile string   write output to logfile
   -v, --version          show program version
 
 Copyleft (L) 2025 Thomas von Dein.
-Licensed under the terms of the GNU GPL version 3.
+Licensed under the terms of the GNU GPL version 3.`
-`
 
 func main() {
+	flag.BoolVarP(&Previous, "prev", "p", false, "cycle backward")
 	flag.BoolVarP(&Debug, "debug", "d", false, "enable debugging")
 	flag.BoolVarP(&Dumptree, "dump", "D", false, "dump the sway tree (needs -d as well)")
+	flag.BoolVarP(&Dumpvisibles, "dump-visibles", "", false, "dump the sway tree (needs -d as well)")
 	flag.BoolVarP(&Notswitch, "no-switch", "n", false, "do not switch windows")
 	flag.BoolVarP(&Version, "version", "v", false, "show program version")
 	flag.BoolVarP(&Showhelp, "help", "h", Showhelp, "show help")
@@ -126,143 +99,73 @@ func main() {
 		if err != nil {
 			log.Fatalf("Failed to open logfile %s: %s", Logfile, err)
 		}
-		defer file.Close()
+		defer func() {
+			if err := file.Close(); err != nil {
+				log.Fatalf("failed to close log file: %s", err)
+			}
+		}()
+
 		setupLogging(file)
 	} else {
 		setupLogging(os.Stdout)
 	}
 
-	// connect to sway unix socket
+	if err := cycle(); err != nil {
-	unixsock, err := setupIPC()
+		log.Fatal(err) // nolint:gocritic
-	if err != nil {
+	}
-		log.Fatalf("Failed to connect to sway unix socket: %s", err)
 }
 
-	// retrieve the raw json tree
+func cycle() error {
-	rawjson, err := getTree(unixsock)
+	// connect to sway unix socket
+	ipc := swayipc.NewSwayIPC()
+
+	err := ipc.Connect()
 	if err != nil {
-		log.Fatalf("Failed to retrieve raw json tree: %s", err)
+		return err
+	}
+	defer func() {
+		if err := ipc.Close(); err != nil {
+			log.Fatal(err)
+		}
+	}()
+
+	sway, err := ipc.GetTree()
+	if err != nil {
+		return err
 	}
 
 	// traverse the tree and find visible windows
-	if err := processJSON(rawjson); err != nil {
+	if err := processJSON(sway); err != nil {
-		log.Fatalf("%s", err)
+		return err
 	}
 
 	if len(Visibles) == 0 {
-		os.Exit(0)
+		return nil
 	}
 
-	id := findNextWindow()
+	var id int
+	if Previous {
+		id = findPrevWindow()
+		slog.Debug("findPrevWindow", "nextid", id)
+	} else {
+		id = findNextWindow()
 		slog.Debug("findNextWindow", "nextid", id)
+	}
 
 	if id > 0 && !Notswitch {
-		switchFocus(id, unixsock)
+		if err := switchFocus(id, ipc); err != nil {
+			return err
 		}
 	}
 
-// connect to unix socket
-func setupIPC() (net.Conn, error) {
-	sockfile := os.Getenv("SWAYSOCK")
-
-	if sockfile == "" {
-		return nil, fmt.Errorf("Environment variable SWAYSOCK does not exist or is empty")
-	}
-
-	conn, err := net.Dial("unix", sockfile)
-	if err != nil {
-		return nil, err
-	}
-
-	return conn, nil
-}
-
-// send a sway message header
-func sendHeaderIPC(sock net.Conn, messageType uint32, len uint32) error {
-	sendPayload := make([]byte, IPC_HEADER_SIZE)
-	copy(sendPayload, []byte(IPC_MAGIC))
-	binary.LittleEndian.PutUint32(sendPayload[6:], len)
-	binary.LittleEndian.PutUint32(sendPayload[10:], messageType)
-
-	_, err := sock.Write(sendPayload)
-
-	if err != nil {
-		return fmt.Errorf("failed to send header to IPC %w", err)
-	}
-
 	return nil
 }
 
-// send a payload, header had to be sent before
-func sendPayloadIPC(sock net.Conn, payload []byte) error {
-	_, err := sock.Write(payload)
-
-	if err != nil {
-		return fmt.Errorf("failed to send payload to IPC %w", err)
-	}
-
-	return nil
-}
-
-// read a response, reads response header and returns payload only
-func readResponseIPC(sock net.Conn) ([]byte, error) {
-	// read header
-	buf := make([]byte, IPC_HEADER_SIZE)
-
-	_, err := sock.Read(buf)
-	if err != nil {
-		return nil, fmt.Errorf("failed to read header from socket: %s", err)
-	}
-
-	slog.Debug("got IPC header", "header", hex.EncodeToString(buf))
-
-	if string(buf[:6]) != IPC_MAGIC {
-		return nil, fmt.Errorf("got invalid IPC response from sway socket")
-	}
-
-	payloadLen := binary.LittleEndian.Uint32(buf[6:10])
-
-	if payloadLen == 0 {
-		return nil, fmt.Errorf("got empty payload IPC response from sway socket")
-	}
-
-	// read payload
-	payload := make([]byte, payloadLen)
-
-	_, err = sock.Read(payload)
-	if err != nil {
-		return nil, fmt.Errorf("failed to read payload from socket: %s", err)
-	}
-
-	return payload, nil
-}
-
-// get raw JSON tree via sway IPC
-func getTree(sock net.Conn) ([]byte, error) {
-	err := sendHeaderIPC(sock, IPC_GET_TREE, 0)
-	if err != nil {
-		return nil, err
-	}
-
-	payload, err := readResponseIPC(sock)
-	if err != nil {
-		return nil, err
-	}
-
-	return payload, nil
-}
-
 // get into the sway tree, determine current workspace and extract all
 // its visible windows, store them in the global var Visibles
-func processJSON(jsoncode []byte) error {
+func processJSON(sway *swayipc.Node) error {
-	sway := Node{}
+	if !sway.IsRoot() && len(sway.Nodes) == 0 {
-
+		return errors.New("invalid or empty JSON structure")
-	if err := json.Unmarshal(jsoncode, &sway); err != nil {
-		return fmt.Errorf("Failed to unmarshal json: %w", err)
-	}
-
-	if !istype(sway, root) && len(sway.Nodes) == 0 {
-		return fmt.Errorf("Invalid or empty JSON structure")
 	}
 
 	if Dumptree {
@@ -270,15 +173,18 @@ func processJSON(jsoncode []byte) error {
 	}
 
 	for _, node := range sway.Nodes {
-		if node.Current_workspace != "" {
+		if node.CurrentWorkspace != "" {
 			// this is an output node containing the current workspace
-			CurrentWorkspace = node.Current_workspace
+			CurrentWorkspace = node.CurrentWorkspace
 			recurseNodes(node.Nodes)
+
 			break
 		}
 	}
 
-	slog.Debug("processed visible windows", "visibles", Visibles)
+	if Dumpvisibles {
+		dumpVisibles()
+	}
 
 	return nil
 }
@@ -295,61 +201,47 @@ func findNextWindow() int {
 	for _, node := range Visibles {
 		if node.Focused {
 			seenfocused = true
+
 			continue
 		}
 
 		if seenfocused {
-			return node.Id
+			return node.ID
 		}
 	}
 
 	if seenfocused {
-		return Visibles[0].Id
+		return Visibles[0].ID
+	}
+
+	return 0
+}
+
+func findPrevWindow() int {
+	vislen := len(Visibles)
+	if vislen == 0 {
+		return 0
+	}
+
+	prevnode := Visibles[vislen-1].ID
+
+	for _, node := range Visibles {
+		if node.Focused {
+			return prevnode
+		}
+
+		prevnode = node.ID
 	}
 
 	return 0
 }
 
 // actually switch focus using a swaymsg command
-func switchFocus(id int, sock net.Conn) error {
+func switchFocus(id int, ipc *swayipc.SwayIPC) error {
-	command := fmt.Sprintf("[con_id=%d] focus", id)
+	responses, err := ipc.RunContainerCommand(id, "focus")
-
-	slog.Debug("executing", "command", command)
-
-	// send switch focus command
-	err := sendHeaderIPC(sock, IPC_RUN_COMMAND, uint32(len(command)))
 	if err != nil {
-		return err
+		return fmt.Errorf("failed to send focus command to container %d: %s (%s)",
-	}
+			id, responses[0].Error, err)
-
-	if err != nil {
-		return fmt.Errorf("failed to send run_command to IPC %w", err)
-	}
-
-	err = sendPayloadIPC(sock, []byte(command))
-	if err != nil {
-		return fmt.Errorf("failed to send switch focus command: %w", err)
-	}
-
-	// check response from sway
-	payload, err := readResponseIPC(sock)
-	if err != nil {
-		return err
-	}
-
-	responses := []Response{}
-
-	if err := json.Unmarshal(payload, &responses); err != nil {
-		return fmt.Errorf("Failed to unmarshal json response: %w", err)
-	}
-
-	if len(responses) == 0 {
-		return fmt.Errorf("Got invalid IPC zero response")
-	}
-
-	if !responses[0].Success {
-		slog.Debug("IPC response to switch focus command", "response", responses)
-		return fmt.Errorf("Failed to switch focus: %s", responses[0].Error)
 	}
 
 	slog.Info("switched focus", "con_id", id)
@@ -358,14 +250,20 @@ func switchFocus(id int, sock net.Conn) error {
 }
 
 // iterate recursively over given node list extracting visible windows
-func recurseNodes(nodes []Node) {
+func recurseNodes(nodes []*swayipc.Node) {
 	for _, node := range nodes {
-		// we handle nodes and floating_nodes identical
+		if node.IsWorkspace() {
-		node.Nodes = append(node.Nodes, node.FloatingNodes...)
-
-		if istype(node, workspace) {
 			if node.Name == CurrentWorkspace {
+				// floating_nodes need to be sorted because
+				// order changes each time they are focused.
+				FloatVis := node.FloatingNodes
+				sort.Slice(FloatVis, func(i, j int) bool {
+					return FloatVis[i].ID < FloatVis[j].ID
+				})
+				// now we can handle nodes and floating_nodes identical
+				node.Nodes = append(node.Nodes, FloatVis...)
 				recurseNodes(node.Nodes)
+
 				return
 			}
 
@@ -375,7 +273,7 @@ func recurseNodes(nodes []Node) {
 
 		// the first nodes seen are workspaces, so if we see a con
 		// node, we are already inside the current workspace
-		if (istype(node, con) || istype(node, floating)) &&
+		if (node.IsContainer() || node.IsFloating()) &&
 			(node.Window > 0 || node.X11Window != "") {
 			Visibles = append(Visibles, node)
 		} else {
@@ -384,6 +282,16 @@ func recurseNodes(nodes []Node) {
 	}
 }
 
+func dumpVisibles() {
+	windows := make([]string, len(Visibles))
+
+	for idx, node := range Visibles {
+		windows[idx] = fmt.Sprintf("id: %02d, focus: %5t, name: %s", node.ID, node.Focused, node.Name)
+	}
+
+	slog.Debug("visible windows on current workspace", "visibles", windows)
+}
+
 // we use line wise logging, unless debugging is enabled
 func setupLogging(output io.Writer) {
 	logLevel := &slog.LevelVar{}
@@ -424,25 +332,7 @@ func setupLogging(output io.Writer) {
 	}
 }
 
-// little helper to distinguish sway tree node types
+// IsNoTty returns TRUE if stdout is NOT a tty or windows
-func istype(nd Node, which int) bool {
-	switch nd.Nodetype {
-	case "root":
-		return which == root
-	case "output":
-		return which == output
-	case "workspace":
-		return which == workspace
-	case "con":
-		return which == con
-	case "floating_con":
-		return which == floating
-	}
-
-	return false
-}
-
-// returns TRUE if stdout is NOT a tty or windows
 func IsNoTty() bool {
 	if !isatty.IsTerminal(os.Stdout.Fd()) {
 		return true