i3-blocks-go/blocks/workspace_apps/main.go

package main

import (
	"encoding/json"
	"fmt"
	r "gitnet.fr/deblan/i3-blocks-go/rendering"
	// "os"
	"flag"
	"os/exec"
	"strconv"
	"strings"
)

type WindowProperty struct {
	Title    string `json:"title"`
	Instance int    `json:"instance"`
}

const binI3Msg = "i3-msg"

type Tree struct {
	Num              int            `json:"num"`
	Output           string         `json:"output"`
	FloatingNodes    []Tree         `json:"floating_nodes"`
	Nodes            []Tree         `json:"nodes"`
	Window           int            `json:"window"`
	Name             string         `json:"name"`
	Focused          bool           `json:"focused"`
	Urgent           bool           `json:"urgent"`
	WindowProperties WindowProperty `json:"window_properties"`
}

type Workspace struct {
	Num     int  `json:"num"`
	Visible bool `json:"visible"`
}

func Focus(window int) {
	exec.Command(binI3Msg, fmt.Sprintf("[id=%d] focus", window)).Run()
}

func GetTree() Tree {
	output, _ := exec.Command(binI3Msg, "-t", "get_tree").Output()
	tree := Tree{}
	json.Unmarshal(output, &tree)

	return tree
}

func GetVisibleWorkspaces() []Workspace {
	output, _ := exec.Command(binI3Msg, "-t", "get_workspaces").Output()
	workspaces := []Workspace{}
	datas := []Workspace{}
	json.Unmarshal(output, &datas)

	for _, workspace := range datas {
		if workspace.Visible {
			workspaces = append(workspaces, workspace)
		}
	}

	return workspaces
}

func GetVisibleNodes(tree Tree, workspaces []Workspace) []Tree {
	var nodes []Tree
	var visibleNodes []Tree

	for _, workspace := range workspaces {
		if tree.Num == workspace.Num {
			for _, node := range tree.Nodes {
				nodes = append(nodes, node)
			}

			for _, node := range tree.FloatingNodes {
				nodes = append(nodes, node)
			}
		} else if tree.Output == "__i3" && tree.Window > 0 {
			nodes = []Tree{tree}
		}
	}

	for _, node := range tree.Nodes {
		nNodes := GetVisibleNodes(node, workspaces)

		for _, n := range nNodes {
			nodes = append(nodes, n)
		}
	}

	for _, node := range tree.FloatingNodes {
		nNodes := GetVisibleNodes(node, workspaces)

		for _, n := range nNodes {
			nodes = append(nodes, n)
		}
	}

	for _, node := range nodes {
		if node.Window > 0 {
			visibleNodes = append(visibleNodes, node)
		} else {
			for _, sNode := range node.Nodes {
				visibleNodes = append(visibleNodes, sNode)
			}

			for _, sNode := range node.FloatingNodes {
				visibleNodes = append(visibleNodes, sNode)
			}
		}
	}

	return visibleNodes
}

func main() {
	workspaces := GetVisibleWorkspaces()
	tree := GetTree()
	nodes := GetVisibleNodes(tree, workspaces)

	argX := flag.String("x", "", "")
	flag.Parse()

	x := 0
	minX := 0

	if *argX != "" {
		x, _ = strconv.Atoi(*argX)
	}

	options := r.NewBlockOptions()

	for _, app := range nodes {
		foreground := "#9cb7d1"
		background := "#222222"

		title := strings.ToUpper(app.WindowProperties.Title)

		if len(title) > 30 {
			title = fmt.Sprintf("%s…", title[0:29])
		}

		size := (len(title) + 4) * 6
		maxX := minX + size
		isClicked := (x > minX && x < maxX)

		if app.Urgent {
			foreground = "#ffffff"
			background = "#07c0d4"
		} else if app.Focused || isClicked {
			foreground = "#07c0d4"
			background = "#333333"
		} else if app.Output == "__i3" {
			foreground = "#bababa"
		}

		if isClicked {
			Focus(app.Window)
		}

		fb := r.FB{
			Foreground: foreground,
			Background: background,
		}

		options.FullText = fmt.Sprintf("%s%s", options.FullText, r.TextWithPadding(title, fb))

		minX = maxX
	}

	block := r.Block("workspace_apps", options)
	fmt.Println(block)
}