initial commit

event.go

@@ -0,0 +1,16 @@
+package sway
+
+import (
+	"encoding/json"
+
+	"git.milar.in/milarin/adverr"
+)
+
+type Event struct {
+	Change    string `json:"change"`
+	Container Node   `json:"container"`
+}
+
+func (e Event) String() string {
+	return string(adverr.Must(json.MarshalIndent(e, "", "\t")))
+}

event_type.go

@@ -0,0 +1,9 @@
+package sway
+
+type EventType string
+
+const (
+	EventTypeWindow    EventType = "window"
+	EventTypeWorkspace EventType = "workspace"
+	// TODO
+)

get_tree.go

@@ -0,0 +1,23 @@
+package sway
+
+import (
+	"context"
+	"encoding/json"
+	"os/exec"
+)
+
+func GetTree(ctx context.Context) (*Node, error) {
+	cmd := exec.CommandContext(ctx, "swaymsg", "-t", "get_tree")
+
+	data, err := cmd.Output()
+	if err != nil {
+		return nil, err
+	}
+
+	var root Node
+	if err := json.Unmarshal(data, &root); err != nil {
+		return nil, err
+	}
+
+	return &root, nil
+}

get_tree_test.go

@@ -0,0 +1,16 @@
+package sway
+
+import (
+	"context"
+	"fmt"
+	"testing"
+)
+
+func TestGetTree(t *testing.T) {
+	root, err := GetTree(context.Background())
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	fmt.Println(root.ID, root.Name)
+}

go.mod

@@ -0,0 +1,5 @@
+module git.milar.in/milarin/sway
+
+go 1.21.1
+
+require git.milar.in/milarin/adverr v1.1.1

go.sum

@@ -0,0 +1,2 @@
+git.milar.in/milarin/adverr v1.1.1 h1:ENtBcqT7CncLsVfaLC3KzX8QSSGiSpsC7I7wDqladu8=
+git.milar.in/milarin/adverr v1.1.1/go.mod h1:joU9sBb7ySyNv4SpTXB0Z4o1mjXsArBw4N27wjgzj9E=

node.go

@@ -0,0 +1,150 @@
+package sway
+
+type Node struct {
+	ID                 NodeID         `json:"id"`
+	Type               NodeType       `json:"type"`
+	Orientation        Orientation    `json:"orientation"`
+	Percentage         float64        `json:"percent"`
+	Urgent             bool           `json:"urgent"`
+	Marks              []string       `json:"marks"`
+	Focused            bool           `json:"focused"`
+	Layout             string         `json:"layout"`
+	Border             BorderStyle    `json:"border"`
+	CurrentBorderWidth int            `json:"current_border_width"`
+	Rect               Rect           `json:"rect"`
+	DecoRect           Rect           `json:"deco_rect"`
+	WindowRect         Rect           `json:"window_rect"`
+	Geometry           Rect           `json:"geometry"`
+	Name               string         `json:"name"`
+	XorgWindowID       *int64         `json:"window"`
+	Nodes              []Node         `json:"nodes"`
+	FloatingNodes      []Node         `json:"floating_nodes"`
+	Focus              []NodeID       `json:"focus"`
+	FullscreenMode     FullscreenMode `json:"fullscreen_mode"`
+	Sticky             bool           `json:"sticky"`
+	PID                int64          `json:"pid"`
+	AppID              string         `json:"app_id"`
+	Visible            bool           `json:"visible"`
+	MaxRenderTimeMilli int64          `json:"max_render_time"`
+	Shell              string         `json:"shell"`
+	InhibitIdle        bool           `json:"inhibit_idle"`
+	IdleInhibitors     IdleInhibitors `json:"idle_inhibitors"`
+
+	// NodeTypeOutput only
+	Primary            bool                `json:"primary"`
+	Make               string              `json:"make"`
+	Model              string              `json:"model"`
+	Serial             string              `json:"serial"`
+	Modes              []OutputMode        `json:"modes"`
+	NonDesktop         bool                `json:"non_desktop"`
+	Active             bool                `json:"active"`
+	DPMS               bool                `json:"dpms"`
+	Power              bool                `json:"power"`
+	Scale              float64             `json:"scale"`
+	ScaleFilter        ScaleFilter         `json:"scale_filter"`
+	Transform          Transform           `json:"transform"`
+	AdaptiveSync       string              `json:"adaptive_sync_status"`
+	LayerShellSurfaces []LayerShellSurface `json:"layer_shell_surfaces"`
+	CurrentWorkspace   string              `json:"current_workspace"`
+	CurrentMode        OutputMode          `json:"current_mode"`
+}
+
+type NodeID int64
+
+type NodeType string
+
+const (
+	NodeTypeRoot        NodeType = "root"
+	NodeTypeOutput      NodeType = "output"
+	NodeTypeCon         NodeType = "con"
+	NodeTypeFloatingCon NodeType = "floating_con"
+	NodeTypeWorkspace   NodeType = "workspace"
+	NodeTypeDockarea    NodeType = "dockarea"
+)
+
+type Rect struct {
+	Y      int `json:"y"`
+	X      int `json:"x"`
+	Width  int `json:"width"`
+	Height int `json:"height"`
+}
+
+type BorderStyle string
+
+const (
+	BorderStyleNormal BorderStyle = "normal"
+	BorderStyleNo     BorderStyle = "none"
+	BorderStylePixel  BorderStyle = "pixel"
+)
+
+type Layout string
+
+const (
+	LayoutSplitH   Layout = "splith"
+	LayoutSplitV   Layout = "splitv"
+	LayoutStacked  Layout = "stacked"
+	LayoutTabbed   Layout = "tabbed"
+	LayoutDockarea Layout = "dockarea"
+	LayoutOutput   Layout = "output"
+)
+
+type FullscreenMode int64
+
+const (
+	FullscreenNone   FullscreenMode = 0
+	FullscreenOutput FullscreenMode = 1
+	FullscreenGlobal FullscreenMode = 2
+)
+
+type IdleInhibitors struct {
+	User        string `json:"user"`
+	Application string `json:"application"`
+}
+
+type OutputMode struct {
+	Width       int    `json:"width"`
+	Height      int    `json:"height"`
+	RefreshRate int    `json:"refresh"`
+	AspectRatio string `json:"picture_aspect_ratio"`
+}
+
+type ScaleFilter string
+
+const (
+	ScaleFilterNearest ScaleFilter = "nearest"
+	ScaleFilterLinear  ScaleFilter = "linear"
+	ScaleFilterSmart   ScaleFilter = "smart"
+)
+
+type Transform string
+
+const (
+	TransformNormal     Transform = "normal"
+	Transform90         Transform = "90"
+	Transform180        Transform = "180"
+	Transform270        Transform = "270"
+	TransformFlipped    Transform = "flipped"
+	TransformFlipped90  Transform = "flipped-90"
+	TransformFlipped180 Transform = "flipped-180"
+	TransformFlipped270 Transform = "flipped-270"
+)
+
+type LayerShellSurface struct {
+	Namespace string   `json:"namespace"`
+	Layer     string   `json:"layer"`
+	Extent    Rect     `json:"extenct"`
+	Effects   []Effect `json:"effects"`
+}
+
+type Effect string
+
+const (
+	EffectBlur Effect = "blur"
+)
+
+type Orientation string
+
+const (
+	OrientationHorizontal Orientation = "horizontal"
+	OrientationVertical   Orientation = "vertical"
+)

subscribe.go

@@ -0,0 +1,38 @@
+package sway
+
+import (
+	"context"
+	"encoding/json"
+	"os/exec"
+)
+
+func Subscribe(ctx context.Context, events ...EventType) (<-chan Event, error) {
+	data, err := json.Marshal(events)
+	if err != nil {
+		return nil, err
+	}
+
+	cmd := exec.CommandContext(ctx, "swaymsg", "-t", "subscribe", "-m", string(data))
+
+	stdout, err := cmd.StdoutPipe()
+	if err != nil {
+		return nil, err
+	}
+
+	out := make(chan Event, 10)
+
+	go func() {
+		defer cmd.Wait()
+		dec := json.NewDecoder(stdout)
+		var event Event
+		for err := dec.Decode(&event); err == nil; err = dec.Decode(&event) {
+			out <- event
+		}
+	}()
+
+	if err := cmd.Start(); err != nil {
+		return nil, err
+	}
+
+	return out, nil
+}

subscribe_test.go

@@ -0,0 +1,18 @@
+package sway
+
+import (
+	"context"
+	"fmt"
+	"testing"
+)
+
+func TestSubscribe(t *testing.T) {
+	events, err := Subscribe(context.Background(), EventTypeWindow, EventTypeWorkspace)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	for event := range events {
+		fmt.Println(event)
+	}
+}