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package bar // import "hhvn.uk/hbspbar/bar"
import (
"fmt"
"sync"
"image"
"errors"
"image/color"
"hhvn.uk/hbspbar/config"
"hhvn.uk/hbspbar/common"
"hhvn.uk/hbspbar/status"
"hhvn.uk/hbspbar/bspc"
"hhvn.uk/hbspbar/drw"
)
var bars map[int]*bar
type bar struct {
id int
w *drw.Window
i *image.RGBA
drawing sync.Mutex
}
func (b *bar) init(state *bspc.State) error {
mon, err := b.getmon(state)
if err != nil { return err }
go mon.TopPadding(config.H)
geom := mon.Rectangle
b.w, err = drw.WindowCreate(geom.X, geom.Y, geom.Width, config.H)
if err != nil { return err }
rect := image.Rect(0, 0, int(mon.Rectangle.Width), int(config.H))
b.i = image.NewRGBA(rect)
return nil
}
func (b *bar) getmon(state *bspc.State) (*bspc.Monitor, error) {
return state.GetMon(b.id)
}
func (b *bar) drawText(x int, col color.Color, text string) (int, error) {
return drw.DrawText(b.i, x, col, text)
}
func (b *bar) drawRect(x, y, w, h int, c color.Color, fill bool) {
drw.DrawRect(b.i, x, y, w, h, c, fill)
}
func (b *bar) draw(state *bspc.State) {
var bg color.Color
var filled bool
b.drawing.Lock()
defer b.drawing.Unlock()
mon, err := b.getmon(state)
if err != nil {
return
}
// Dimensions of drawing space
cx := 0
w := int(mon.Rectangle.Width)
h := int(config.H)
// Draw background
b.drawRect(0, 0, w, h, config.Bg, true)
// Monitor
montext := mon.Name
monw := 6 + drw.TextWidth(montext) + 8
if mon.Focused {
bg = config.Sel
} else {
bg = config.UnselMon
}
b.drawRect(cx, 0, monw, h, bg, true)
b.drawText(cx + 6, config.Fg, montext)
cx += monw
// Desktops
boxw := 4
ds := len(mon.Desktops)
dw := 4 + (4 + boxw + 2 + 3) * ds + 5
for i := 0; i < ds; i++ {
dw += drw.TextWidth(mon.Desktops[i].Name)
}
cx += 4
for i := 0; i < ds; i++ {
d := mon.Desktops[i]
cx += 5
if d.Focused {
bg = config.Sel
} else {
bg = config.FgDark
}
filled = d.Root != nil
b.drawRect(cx, 3, boxw, h - 7, bg, filled)
cx += boxw + 2
ax, _ := b.drawText(cx, config.Fg, d.Name)
cx += ax + 2
}
status.Mutex.Lock()
cx = int(mon.Rectangle.Width) - 6
for i := len(status.Status) - 1; i >= 0; i -= 1 {
s, ok := status.Status[i]
if ok {
cx -= s.W
cx -= config.StatusPad
}
}
cx += config.StatusPad
cx -= 6
b.drawRect(cx, 0, int(mon.Rectangle.Width) - cx, int(config.H),
config.Status, true)
cx = int(mon.Rectangle.Width) - 6
for i := len(status.Status) - 1; i >= 0; i -= 1 {
s, ok := status.Status[i]
if ok {
cx -= s.W
drw.AddImg(b.i, cx, s.W, s.I)
cx -= config.StatusPad
}
}
status.Mutex.Unlock()
b.w.Paint(b.i)
}
func (b *bar) destroy(state *bspc.State) {
mon, _ := b.getmon(state)
if (mon != nil) {
mon.TopPadding(0)
}
}
// External interface
type handle struct {
Create chan int
Destroy chan int
NewState chan *bspc.State
Err chan error
}
var cleanup chan bool
var Handle handle
func init() {
var state *bspc.State
state = nil
Handle.Create = make(chan int)
Handle.Destroy = make(chan int)
Handle.NewState = make(chan *bspc.State)
Handle.Err = make(chan error)
cleanup = make(chan bool)
go func() {
defer func() {
close(Handle.Create)
close(Handle.Destroy)
close(Handle.NewState)
close(Handle.Err)
}()
for {
select {
case e := <- drw.Events:
if e.Ev == nil && e.Err == nil {
Handle.Err <- fmt.Errorf("X connection clossed")
return
}
if e.Err != nil {
common.Perror("X.WaitForEvents", e.Err)
continue
}
// switch e.Ev.(type) {
// case xproto.DestroyNotifyEvent:
// Handle.Err <- fmt.Errorf("Window destroyed")
// return
// default:
// }
case id := <- Handle.Destroy:
bars[id].destroy(state)
delete(bars, id)
case id := <- Handle.Create:
if state == nil {
Handle.Err <- errors.New("attempted to create a bar with uninitialized state")
return
}
if _, ok := bars[id]; ok { break }
if err := create(state, id); err != nil {
Handle.Err <- fmt.Errorf("Couldn't create window: %s\n", err)
return
}
case <- cleanup:
for _, b := range bars {
go b.destroy(state)
}
return
case <- status.Updated:
for _, b := range bars {
go b.draw(state)
}
case state = <- Handle.NewState:
for _, b := range bars {
go b.draw(state)
}
}
}
}()
}
func create(state *bspc.State, id int) (error) {
var b bar
b.id = id
b.i = nil
if err := b.init(state); err != nil {
return err
}
go b.draw(state)
if bars == nil {
bars = make(map[int]*bar)
}
bars[b.id] = &b
return nil
}
func Cleanup() {
cleanup <- true
}
|