"os/exec"
"github.com/jezek/xgb"
- "github.com/jezek/xgb/xinerama"
"github.com/jezek/xgb/xproto"
)
XK_Return = 0xff0d
)
+// TODO: These module-level global variables have arisen while establishing
+// basic functionality. Before proceeding much further, figure out what to do
+// with them.
var xc *xgb.Conn
-var attachedScreens []xinerama.ScreenInfo
-var xroot xproto.ScreenInfo
var keymap [256][]xproto.Keysym
func main() {
- xConn, err := xgb.NewConn()
- if err != nil {
- log.Fatal(err)
- }
- xc = xConn
- defer xc.Close()
-
- setup := xproto.Setup(xc)
- if setup == nil || len(setup.Roots) < 1 {
- log.Fatal("ILLI: Unable to parse received SetupInfo from X11 server.")
- }
-
- if err := xinerama.Init(xc); err != nil {
- log.Fatal(err)
- }
-
- if r, err := xinerama.QueryScreens(xc).Reply(); err != nil {
- log.Fatal(err)
- } else {
- if len(r.ScreenInfo) == 0 {
- attachedScreens = []xinerama.ScreenInfo{
- xinerama.ScreenInfo{
- Width: setup.Roots[0].WidthInPixels,
- Height: setup.Roots[0].HeightInPixels,
- },
- }
- } else {
- attachedScreens = r.ScreenInfo
- }
- }
-
- connInfo := xproto.Setup(xc)
- if connInfo == nil {
- log.Fatal("ILLI: Unable to parse X connection information")
- }
- if len(connInfo.Roots) != 1 {
- log.Fatal("ILLI: Inappropriate number of roots. Did xinerama initialize correctly?")
- }
- xroot = connInfo.Roots[0]
-
- // Attempt to register as the window manager
- if err := TakeWMOwnership(); err != nil {
- if _, ok := err.(xproto.AccessError); ok {
- log.Fatal("ILLI: Unable to register as window manager with X server. Perhaps another WM is already running?")
- }
- log.Fatal(err)
- }
+ xconn := connectToXServer()
+ attachedScreens := getAttachedScreens(xconn)
+ xroot := getXRoot(xconn)
+ keymap = getKeyboardMap(xconn)
+ registerForKeyEvents(xconn, xroot, keymap)
- fmt.Println("ILLI: Successfully registered as WM with X server.")
+ becomeWM(xconn, xroot)
-// -----------------------------------------------------------------------------
+ // Build a list of windows needing management ------------------------------
- const (
- loKey = 8
- hiKey = 255
- )
-
- m := xproto.GetKeyboardMapping(xc, loKey, hiKey-loKey+1)
- reply, err := m.Reply()
- if err != nil {
- log.Fatal(err)
- }
- if reply == nil {
- log.Fatal("Could not load keyboard map")
- }
-
- for i := 0; i < hiKey-loKey+1; i++ {
- keymap[loKey+i] = reply.Keysyms[i*int(reply.KeysymsPerKeycode) : (i+1)*int(reply.KeysymsPerKeycode)]
- }
- grabs := []struct {
- sym xproto.Keysym
- modifiers uint16
- codes []xproto.Keycode
- }{
- {
- sym: XK_q,
- modifiers: xproto.ModMask1 | xproto.ModMaskShift,
- },
- {
- sym: XK_Return,
- modifiers: xproto.ModMask1 | xproto.ModMaskShift,
- },
- }
-
- for i, syms := range keymap {
- for _, sym := range syms {
- for c := range grabs {
- if grabs[c].sym == sym {
- grabs[c].codes = append(grabs[c].codes, xproto.Keycode(i))
- }
- }
- }
- }
- for _, grabbed := range grabs {
- for _, code := range grabbed.codes {
- if err := xproto.GrabKeyChecked(
- xc,
- false,
- xroot.Root,
- grabbed.modifiers,
- code,
- xproto.GrabModeAsync,
- xproto.GrabModeAsync,
- ).Check(); err != nil {
- log.Print(err)
- }
-
- }
+ xc = xconn
+ if len(attachedScreens) > 0 {
+ fmt.Println("The Go compiler is waaaaay too picky about unused variables...")
}
-// -----------------------------------------------------------------------------
-
tree, err := xproto.QueryTree(xc, xroot.Root).Reply()
if err != nil {
log.Fatal(err)
}
+ // Main program loop reacts to X events ------------------------------------
+
eventloop:
for {
xevent, err := xc.WaitForEvent()
}
}
-func TakeWMOwnership() error {
- return xproto.ChangeWindowAttributesChecked(
- xc,
- xroot.Root,
- xproto.CwEventMask,
- []uint32{
- xproto.EventMaskKeyPress |
- xproto.EventMaskKeyRelease |
- xproto.EventMaskButtonPress |
- xproto.EventMaskButtonRelease |
- xproto.EventMaskStructureNotify |
- xproto.EventMaskSubstructureRedirect,
- }).Check()
-}
-
+// The client list appears to have some entries for windows that shouldn't
+// actually be viewable. For now, it appears that only windows with a
+// `MapState` value of 2 should be viewable. TODO: Verify this.
+// - https://github.com/BurntSushi/xgb/blob/master/xproto/xproto.go#L3772
+// - https://github.com/BurntSushi/xgb/blob/master/xproto/xproto.go#L10287
func isMappedWindow(windowID xproto.Window) bool {
reply, err := xproto.GetWindowAttributes(xc, windowID).Reply()
if err != nil {
log.Fatal(err)
}
- // TODO: Verify this.
- // It appears that only windows with a `MapState` value of 2 should be 'viewable'.
- // - https://github.com/BurntSushi/xgb/blob/master/xproto/xproto.go#L3772
- // - https://github.com/BurntSushi/xgb/blob/master/xproto/xproto.go#L10287
if reply != nil && reply.MapState == 2 {
return true
}
return false
}
+// TODO: Determine how I want to split the main event loop from the various
+// event handlers (like this keypress handler). It shouldn't grow too
+// fragmented, nor should it grow into a monolithic beast, but the balance
+// needs to be selected after the handlers are built out more completely.
func handleKeyPressEvent(key xproto.KeyPressEvent) error {
switch keymap[key.Detail][0] {
case XK_q:
default:
return nil
}
- return nil // What do I actually want to return here?
+ return nil // TODO: What do I actually want to return here?
}