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package status // import "hhvn.uk/hbspbar/status"
import (
"fmt"
"time"
"sync"
"image"
"image/color"
"hhvn.uk/hbspbar/drw"
"hhvn.uk/hbspbar/config"
"hhvn.uk/hbspbar/common"
)
var NewBlocks = make(chan *Blocks)
var updates = make(chan *status)
var statusid = make(map[string]int)
type Blocks struct {
l *sync.RWMutex
m map[int]*status
}
func (b *Blocks) Len() int {
b.l.RLock()
defer b.l.RUnlock()
return len(b.m)
}
func (b *Blocks) Get(i int) (s *status, ok bool) {
b.l.RLock()
defer b.l.RUnlock()
s, ok = b.m[i]
return
}
type status struct {
Name string
I *image.RGBA
W int
}
func init() {
var mutex sync.RWMutex
status := make(map[int]*status)
b := &Blocks{&mutex, status}
go func() {
for s := range updates {
id := statusid[s.Name]
mutex.Lock()
status[id] = s
mutex.Unlock()
NewBlocks <- b
}
}()
}
func register(name string, fn func(string) error) {
nid := 0
for _, id := range statusid {
if id >= nid {
nid = id + 1
}
}
statusid[name] = nid
go func(){
for {
err := fn(name)
if err != nil {
common.Error("status \"%s\": %s\n", name, err)
u := newUpdate(name)
u.drawText(0, config.Red, fmt.Sprintf("[err: %s]", name))
updates <- u
sleep(5)
}
}
}()
}
func newUpdate(name string) (*status) {
var s status
s.Name = name
s.W = 0
s.I = image.NewRGBA(image.Rect(0, 0, 1000, int(config.H)))
// Use drw's in order not to modify s.W
drw.DrawRect(s.I, 0, 0, 1000, int(config.H), config.Status, true)
return &s
}
func sleep(s int) {
time.Sleep(time.Duration(s) * time.Second)
}
func blendGYR(percent int) color.Color {
return drw.Blend(percent, config.Green, config.Yellow, config.Red)
}
func blendBg(c color.Color) color.Color {
return drw.Blend(75, c, config.Status)
}
func (s *status) furthest(x int) {
if x > s.W {
s.W = x
}
}
func (s *status) drawText(x int, col color.Color, text string) (int, error) {
w, err := drw.DrawText(s.I, x, col, text)
s.furthest(x + w)
return w, err
}
func (s *status) drawRect(x, y, w, h int, c color.Color, fill bool) {
drw.DrawRect(s.I, x, y, w, h, c, fill)
s.furthest(x + w)
}
func (s *status) drawPercentBar(x, percent int) int {
tbpad := 3
th := int(config.H) - tbpad * 2 + 1
h := int(th * percent / 100)
fg := blendGYR(percent)
bg := blendBg(fg)
s.drawRect(x, tbpad - 1, 3, th, bg, true)
s.drawRect(x, tbpad + th - h - 1, 3, h, fg, true)
return 5
}
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