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package drw // import "hhvn.uk/hbspbar/drw"
import (
"os"
"image"
"hhvn.uk/hbspbar/config"
"hhvn.uk/hbspbar/common"
"github.com/jezek/xgb"
"github.com/jezek/xgb/xproto"
"github.com/jezek/xgbutil"
"github.com/jezek/xgbutil/icccm"
"github.com/jezek/xgbutil/ewmh"
"github.com/jezek/xgbutil/xgraphics"
"github.com/BurntSushi/freetype-go/freetype/truetype"
)
type eventwrap struct {
Ev xgb.Event
Err error
}
var InitErr error
var Events chan *eventwrap
var xc *xgb.Conn
var xu *xgbutil.XUtil
var screen *xproto.ScreenInfo
var font *truetype.Font
func init() {
var err error
xc, err = xgb.NewConn()
if err != nil {
InitErr = err
return
}
xu, err = xgbutil.NewConnXgb(xc)
if err != nil {
InitErr = err
return
}
setup := xproto.Setup(xc)
screen = setup.DefaultScreen(xc)
read, err := os.Open(config.Font)
if err != nil {
InitErr = common.Perror("os.Open", err)
return
}
font, err = xgraphics.ParseFont(read)
if err != nil {
InitErr = common.Perror("xgraphics.ParseFont", err)
return
}
Events := make(chan *eventwrap)
go func() { for {
ev, err := xc.WaitForEvent()
w := eventwrap{ev, err}
Events <- &w
}}()
}
type Window struct {
id xproto.Window
}
func WindowCreate(x, y, w, h uint) (*Window, error) {
var win Window
var err error
win.id, err = xproto.NewWindowId(xc)
if err != nil {
return nil, common.Perror("xproto.NewWindowId", err)
}
xproto.CreateWindow(xc, screen.RootDepth, win.id, screen.Root,
int16(x), int16(y), uint16(w), uint16(h), 0,
xproto.WindowClassInputOutput, screen.RootVisual,
xproto.CwBackPixel|xproto.CwEventMask, []uint32{
0x00000000,
xproto.EventMaskStructureNotify })
class := icccm.WmClass{"hbspbar", "hbspbar"}
icccm.WmClassSet(xu, win.id, &class)
ewmh.WmWindowTypeSet(xu, win.id, []string{"_NET_WM_WINDOW_TYPE_DOCK"})
ewmh.WmStateSet(xu, win.id, []string{"_NET_WM_STATE_STICKY", "_NET_WM_STATE_ABOVE"})
err = xproto.MapWindowChecked(xc, win.id).Check()
if err != nil {
return nil, common.Perror("xproto.MapWindow", err)
}
return &win, nil
}
func (w *Window) Paint(i image.Image) {
xgr := xgraphics.NewConvert(xu, i)
xgr.XSurfaceSet(w.id)
xgr.XDraw()
xgr.XPaint(w.id)
}
func (w *Window) Destroy() {
xproto.DestroyWindow(xc, w.id)
}
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