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package main
import (
"fmt"
"os"
"os/signal"
"strconv"
"syscall"
"time"
"github.com/cjbassi/gotop/colorschemes"
w "github.com/cjbassi/gotop/widgets"
ui "github.com/cjbassi/termui"
"github.com/docopt/docopt-go"
)
const VERSION = "1.2.4"
var (
termResized = make(chan bool, 1)
helpToggled = make(chan bool, 1)
helpVisible = false
// proc widget takes longer to load, wait to render until it loads data
procLoaded = make(chan bool, 1)
// used to render the proc widget whenever a key is pressed for it
keyPressed = make(chan bool, 1)
// used to render cpu and mem when zoom has changed
zoomed = make(chan bool, 1)
colorscheme = colorschemes.Default
minimal = false
interval = time.Second
zoom = 7
zoomInterval = 3
cpu *w.CPU
mem *w.Mem
proc *w.Proc
net *w.Net
disk *w.Disk
temp *w.Temp
help *w.HelpMenu
)
func cliArguments() {
usage := `
Usage: gotop [options]
Options:
-c, --color=NAME Set a colorscheme.
-h, --help Show this screen.
-m, --minimal Only show CPU, Mem and Process widgets.
-r, --rate=RATE Number of times per second to update CPU and Mem widgets [default: 1].
-v, --version Show version.
Colorschemes:
default
default-dark (for terminals with a white background)
solarized
monokai
`
args, _ := docopt.ParseArgs(usage, os.Args[1:], VERSION)
if val, _ := args["--color"]; val != nil {
handleColorscheme(val.(string))
}
minimal, _ = args["--minimal"].(bool)
rateStr, _ := args["--rate"].(string)
rate, _ := strconv.ParseFloat(rateStr, 64)
if rate < 1 {
interval = time.Second * time.Duration(1/rate)
} else {
interval = time.Second / time.Duration(rate)
}
}
func handleColorscheme(cs string) {
switch cs {
case "default":
colorscheme = colorschemes.Default
case "solarized":
colorscheme = colorschemes.Solarized
case "monokai":
colorscheme = colorschemes.Monokai
case "default-dark":
colorscheme = colorschemes.DefaultDark
default:
fmt.Fprintf(os.Stderr, "error: colorscheme not recognized\n")
os.Exit(1)
}
}
func setupGrid() {
ui.Body.Cols = 12
ui.Body.Rows = 12
if minimal {
ui.Body.Set(0, 0, 12, 6, cpu)
ui.Body.Set(0, 6, 6, 12, mem)
ui.Body.Set(6, 6, 12, 12, proc)
} else {
ui.Body.Set(0, 0, 12, 4, cpu)
ui.Body.Set(0, 4, 4, 6, disk)
ui.Body.Set(0, 6, 4, 8, temp)
ui.Body.Set(4, 4, 12, 8, mem)
ui.Body.Set(0, 8, 6, 12, net)
ui.Body.Set(6, 8, 12, 12, proc)
}
}
func keyBinds() {
// quits
ui.On("q", "<C-c>", func(e ui.Event) {
ui.StopLoop()
})
// toggles help menu
ui.On("?", func(e ui.Event) {
helpToggled <- true
helpVisible = !helpVisible
})
// hides help menu
ui.On("<escape>", func(e ui.Event) {
if helpVisible {
helpToggled <- true
helpVisible = false
}
})
ui.On("h", func(e ui.Event) {
zoom += zoomInterval
cpu.Zoom = zoom
mem.Zoom = zoom
zoomed <- true
})
ui.On("l", func(e ui.Event) {
if zoom > zoomInterval {
zoom -= zoomInterval
cpu.Zoom = zoom
mem.Zoom = zoom
zoomed <- true
}
})
}
func termuiColors() {
ui.Theme.Fg = ui.Color(colorscheme.Fg)
ui.Theme.Bg = ui.Color(colorscheme.Bg)
ui.Theme.LabelFg = ui.Color(colorscheme.BorderLabel)
ui.Theme.LabelBg = ui.Color(colorscheme.Bg)
ui.Theme.BorderFg = ui.Color(colorscheme.BorderLine)
ui.Theme.BorderBg = ui.Color(colorscheme.Bg)
ui.Theme.TableCursor = ui.Color(colorscheme.ProcCursor)
ui.Theme.Sparkline = ui.Color(colorscheme.Sparkline)
ui.Theme.GaugeColor = ui.Color(colorscheme.DiskBar)
}
func widgetColors() {
mem.LineColor["Main"] = ui.Color(colorscheme.MainMem)
mem.LineColor["Swap"] = ui.Color(colorscheme.SwapMem)
LineColor := make(map[string]ui.Color)
if cpu.Count <= 8 {
for i := 0; i < len(cpu.Data); i++ {
LineColor[fmt.Sprintf("CPU%d", i)] = ui.Color(colorscheme.CPULines[i])
}
} else {
LineColor["Average"] = ui.Color(colorscheme.CPULines[0])
}
cpu.LineColor = LineColor
if !minimal {
temp.TempLow = ui.Color(colorscheme.TempLow)
temp.TempHigh = ui.Color(colorscheme.TempHigh)
}
}
func main() {
cliArguments()
keyBinds()
// need to do this before initializing widgets so that they can inherit the colors
termuiColors()
cpu = w.NewCPU(interval, zoom)
mem = w.NewMem(interval, zoom)
proc = w.NewProc(procLoaded, keyPressed)
if !minimal {
net = w.NewNet()
disk = w.NewDisk()
temp = w.NewTemp()
}
widgetColors()
<-procLoaded
// inits termui
err := ui.Init()
if err != nil {
panic(err)
}
defer ui.Close()
setupGrid()
// load help widget after init termui/termbox so that it has access to terminal size
help = w.NewHelpMenu()
ui.On("<resize>", func(e ui.Event) {
ui.Body.Width, ui.Body.Height = e.Width, e.Height
ui.Body.Resize()
help.XOffset = (ui.Body.Width - help.X) / 2
help.YOffset = (ui.Body.Height - help.Y) / 2
termResized <- true
})
// all rendering done here
go func() {
ui.Render(ui.Body)
drawTick := time.NewTicker(interval)
for {
select {
case <-helpToggled:
if helpVisible {
ui.Clear()
ui.Render(help)
} else {
ui.Render(ui.Body)
}
case <-termResized:
if !helpVisible {
ui.Clear()
ui.Render(ui.Body)
} else if helpVisible {
ui.Clear()
ui.Render(help)
}
case <-keyPressed:
if !helpVisible {
ui.Render(proc)
}
case <-zoomed:
if !helpVisible {
ui.Render(ui.Body)
}
case <-drawTick.C:
if !helpVisible {
ui.Render(ui.Body)
}
}
}
}()
// handles os kill signal
c := make(chan os.Signal, 2)
signal.Notify(
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