func initKeyboardMapping() {
const (
keyLo = 8
keyHi = 255
)
km, err := xp.GetKeyboardMapping(xConn, keyLo, keyHi-keyLo+1).Reply()
if err != nil {
log.Fatal(err)
}
if km == nil {
log.Fatal("couldn't get keyboard mapping")
}
n := int(km.KeysymsPerKeycode)
if n < 2 {
log.Fatalf("too few keysyms per keycode: %d", n)
}
for i := keyLo; i <= keyHi; i++ {
keysyms[i][0] = km.Keysyms[(i-keyLo)*n+0]
keysyms[i][1] = km.Keysyms[(i-keyLo)*n+1]
}
toGrabs := []xp.Keysym{wmKeysym}
if doAudioActions {
toGrabs = append(toGrabs, xkAudioLowerVolume, xkAudioMute, xkAudioRaiseVolume)
}
for _, toGrab := range toGrabs {
keycode := xp.Keycode(0)
for i := keyLo; i <= keyHi; i++ {
if keysyms[i][0] == toGrab || keysyms[i][1] == toGrab {
keycode = xp.Keycode(i)
}
}
if keycode == 0 {
if toGrab != wmKeysym {
continue
}
log.Fatalf("could not find the window manager key %s", keysymString(toGrab))
}
if err := xp.GrabKeyChecked(xConn, false, rootXWin, xp.ModMaskAny, keycode,
xp.GrabModeAsync, xp.GrabModeAsync).Check(); err != nil {
log.Fatal(err)
}
}
// Disable Caps Lock if it is the wmKeysym.
if wmKeysym == xkCapsLock {
// On Ubuntu 12.04, disabling Caps Lock involved the equivalent of
// `xmodmap -e "clear lock"`. On Ubuntu 14.04, XKB has replaced xmodmap,
// possibly because this facilitates per-window keyboard layouts, so the
// equivalent of `xmodmap -e "clear lock"` doesn't work. As of October
// 2014, github.com/BurntSushi/xgb doesn't support XKB, so we exec the
// setxkbmap program instead of speaking the X11 protocol directly to
// disable Caps Lock.
if err := exec.Command("setxkbmap", "-option", "caps:none").Run(); err != nil {
log.Fatalf("setxkbmap failed: %v", err)
}
}
}
func findKeycode(keysym xp.Keysym) (keycode xp.Keycode, shift bool) {
for i, k := range keysyms {
if k[0] == keysym {
return xp.Keycode(i), false
}
if k[1] == keysym {
return xp.Keycode(i), true
}
}
return 0, false
}
// Given a keysym, find the keycode mapped to it in the current X environment.
// keybind.Initialize MUST have been called before using this function.
func keycodeGet(xu *xgbutil.XUtil, keysym xproto.Keysym) xproto.Keycode {
min, max := minMaxKeycodeGet(xu)
keyMap := KeyMapGet(xu)
if keyMap == nil {
panic("keybind.Initialize must be called before using the keybind " +
"package.")
}
var c byte
for kc := int(min); kc <= int(max); kc++ {
for c = 0; c < keyMap.KeysymsPerKeycode; c++ {
if keysym == KeysymGet(xu, xproto.Keycode(kc), c) {
return xproto.Keycode(kc)
}
}
}
return 0
}
func ByteToString(k *Keyboard, b1 byte, b2 byte) string {
if b1 != 0 {
return k.KeycodeToString(xproto.Keycode(b1))
}
if b2 != 0 {
return fmt.Sprintf("button%d", b2)
}
return ""
}
func (k *Keyboard) Keycodes(keysym xproto.Keysym) []xproto.Keycode {
var c byte
var keycode xproto.Keycode
keycodes := make([]xproto.Keycode, 0)
set := make(map[xproto.Keycode]bool, 0)
for kc := int(k.Min); kc <= int(k.Max); kc++ {
keycode = xproto.Keycode(kc)
for c = 0; c < k.KeysymsPerKeycode; c++ {
if keysym == k.Keysymget(keycode, c) && !set[keycode] {
keycodes = append(keycodes, keycode)
set[keycode] = true
}
}
}
return keycodes
}
// StrToKeycode is a wrapper around keycodeGet meant to make our search
// a bit more flexible if needed. (i.e., case-insensitive)
func StrToKeycode(xu *xgbutil.XUtil, str string) xproto.Keycode {
// Do some fancy case stuff before we give up.
sym, ok := keysyms[str]
if !ok {
sym, ok = keysyms[strings.Title(str)]
}
if !ok {
sym, ok = keysyms[strings.ToLower(str)]
}
if !ok {
sym, ok = keysyms[strings.ToUpper(str)]
}
// If we don't know what 'str' is, return 0.
// There will probably be a bad access. We should do better than that...
if !ok {
return xproto.Keycode(0)
}
return keycodeGet(xu, sym)
}
// ParseString takes a string of the format '[Mod[-Mod[...]]]-KEY',
// i.e., 'Mod4-j', and returns a modifiers/keycode combo.
// An error is returned if the string is malformed, or if no valid KEY can
// be found.
// Valid values of KEY should include almost anything returned by pressing
// keys with the 'xev' program. Alternatively, you may reference the keys
// of the 'keysyms' map defined in keybind/keysymdef.go.
func ParseString(xu *xgbutil.XUtil, s string) (uint16, xproto.Keycode, error) {
mods, kc := uint16(0), xproto.Keycode(0)
for _, part := range strings.Split(s, "-") {
switch strings.ToLower(part) {
case "shift":
mods |= xproto.ModMaskShift
case "lock":
mods |= xproto.ModMaskLock
case "control":
mods |= xproto.ModMaskControl
case "mod1":
mods |= xproto.ModMask1
case "mod2":
mods |= xproto.ModMask2
case "mod3":
mods |= xproto.ModMask3
case "mod4":
mods |= xproto.ModMask4
case "mod5":
mods |= xproto.ModMask5
case "any":
mods |= xproto.ModMaskAny
default: // a key code!
if kc == 0 { // only accept the first keycode we see
kc = StrToKeycode(xu, part)
}
}
}
if kc == 0 {
return 0, 0, fmt.Errorf("Could not find a valid keycode in the "+
"string '%s'. Key binding failed.", s)
}
return mods, kc, nil
}
// Given a keysym, find all keycodes mapped to it in the current X environment.
// keybind.Initialize MUST have been called before using this function.
func keycodesGet(xu *xgbutil.XUtil, keysym xproto.Keysym) []xproto.Keycode {
min, max := minMaxKeycodeGet(xu)
keyMap := KeyMapGet(xu)
if keyMap == nil {
panic("keybind.Initialize must be called before using the keybind " +
"package.")
}
var c byte
var keycode xproto.Keycode
keycodes := make([]xproto.Keycode, 0)
set := make(map[xproto.Keycode]bool, 0)
for kc := int(min); kc <= int(max); kc++ {
keycode = xproto.Keycode(kc)
for c = 0; c < keyMap.KeysymsPerKeycode; c++ {
if keysym == KeysymGet(xu, keycode, c) && !set[keycode] {
keycodes = append(keycodes, keycode)
set[keycode] = true
}
}
}
return keycodes
}
// updateMaps runs in response to MappingNotify events.
// It is responsible for making sure our view of the world's keyboard
// and modifier maps is correct. (Pointer mappings should be handled in
// a similar callback in the mousebind package.)
func updateMaps(xu *xgbutil.XUtil, e xevent.MappingNotifyEvent) {
keyMap, modMap := MapsGet(xu)
// Hold up... If this is MappingKeyboard, then we may have some keycode
// changes. This is GROSS. We basically need to go through each keycode
// in the map, look up the keysym using the new map and use that keysym
// to look up the keycode in our current map. If the current keycode
// does not equal the old keycode, then we log the change in a map of
// old keycode -> new keycode.
// Once the map is constructed, we look through all of our keybindings
// and updated appropriately. *puke*
// I am only somewhat confident that this is correct.
if e.Request == xproto.MappingKeyboard {
changes := make(map[xproto.Keycode]xproto.Keycode, 0)
xuKeyMap := &xgbutil.KeyboardMapping{keyMap}
min, max := minMaxKeycodeGet(xu)
// let's not do too much allocation in our loop, shall we?
var newSym, oldSym xproto.Keysym
var oldKc xproto.Keycode
var column byte
// wrap 'int(..)' around bytes min and max to avoid overflow. Hideous.
for newKc := int(min); newKc <= int(max); newKc++ {
for column = 0; byte(column) < keyMap.KeysymsPerKeycode; column++ {
// use new key map
newSym = KeysymGetWithMap(xu, xuKeyMap, xproto.Keycode(newKc),
column)
// uses old key map
oldKc = keycodeGet(xu, newSym)
oldSym = KeysymGet(xu, xproto.Keycode(newKc), column)
// If the old and new keysyms are the same, ignore!
// Also ignore if either keysym is VoidSymbol
if oldSym == newSym || oldSym == 0 || newSym == 0 {
continue
}
// these should match if there are NO changes
if oldKc != xproto.Keycode(newKc) {
changes[oldKc] = xproto.Keycode(newKc)
}
}
}
// Now use 'changes' to do some regrabbing
// Loop through all key bindings and check if we have any affected
// key codes. (Note that each key binding may be associated with
// multiple callbacks.)
// We must ungrab everything first, in case two keys are being swapped.
for _, key := range keyKeys(xu) {
if _, ok := changes[key.Code]; ok {
Ungrab(xu, key.Win, key.Mod, key.Code)
}
}
// Okay, now grab.
for _, key := range keyKeys(xu) {
if newKc, ok := changes[key.Code]; ok {
Grab(xu, key.Win, key.Mod, newKc)
updateKeyBindKey(xu, key, newKc)
}
}
}
// We don't have to do something with MappingModifier like we do with
// MappingKeyboard. This is due to us requiring that key strings use
// modifier names built into X. (i.e., the names seen in the output of
// `xmodmap`.) This means that the modifier mappings happen on the X server
// side, so we don't *typically* have to care what key is actually being
// pressed to trigger a modifier. (There are some exceptional cases, and
// when that happens, we simply query on-demand which keys are modifiers.
// See the RunKey{Press,Release}Callbacks functions in keybind/callback.go
// for the deets.)
// Finally update our view of the mappings.
KeyMapSet(xu, keyMap)
ModMapSet(xu, modMap)
}
func (w *Window) handleEvents() {
var noX int32 = 1<<31 - 1
noX++
var lastX, lastY int32 = noX, 0
var button wde.Button
downKeys := map[string]bool{}
for {
e, err := w.conn.WaitForEvent()
if err != nil {
fmt.Fprintln(os.Stderr, "[go.wde X error] ", err)
continue
}
switch e := e.(type) {
case xproto.ButtonPressEvent:
button = button | buttonForDetail(e.Detail)
var bpe wde.MouseDownEvent
bpe.Which = buttonForDetail(e.Detail)
bpe.Where.X = int(e.EventX)
bpe.Where.Y = int(e.EventY)
lastX = int32(e.EventX)
lastY = int32(e.EventY)
w.events <- bpe
case xproto.ButtonReleaseEvent:
button = button & ^buttonForDetail(e.Detail)
var bue wde.MouseUpEvent
bue.Which = buttonForDetail(e.Detail)
bue.Where.X = int(e.EventX)
bue.Where.Y = int(e.EventY)
lastX = int32(e.EventX)
lastY = int32(e.EventY)
w.events <- bue
case xproto.LeaveNotifyEvent:
var wee wde.MouseExitedEvent
wee.Where.X = int(e.EventX)
wee.Where.Y = int(e.EventY)
if lastX != noX {
wee.From.X = int(lastX)
wee.From.Y = int(lastY)
} else {
wee.From.X = wee.Where.X
wee.From.Y = wee.Where.Y
}
lastX = int32(e.EventX)
lastY = int32(e.EventY)
w.events <- wee
case xproto.EnterNotifyEvent:
var wee wde.MouseEnteredEvent
wee.Where.X = int(e.EventX)
wee.Where.Y = int(e.EventY)
if lastX != noX {
wee.From.X = int(lastX)
wee.From.Y = int(lastY)
} else {
wee.From.X = wee.Where.X
wee.From.Y = wee.Where.Y
}
lastX = int32(e.EventX)
lastY = int32(e.EventY)
w.events <- wee
case xproto.MotionNotifyEvent:
var mme wde.MouseMovedEvent
mme.Where.X = int(e.EventX)
mme.Where.Y = int(e.EventY)
if lastX != noX {
mme.From.X = int(lastX)
mme.From.Y = int(lastY)
} else {
mme.From.X = mme.Where.X
mme.From.Y = mme.Where.Y
}
lastX = int32(e.EventX)
lastY = int32(e.EventY)
if button == 0 {
w.events <- mme
} else {
var mde wde.MouseDraggedEvent
mde.MouseMovedEvent = mme
mde.Which = button
w.events <- mde
}
case xproto.KeyPressEvent:
var ke wde.KeyEvent
code := keybind.LookupString(w.xu, e.State, e.Detail)
ke.Key = keyForCode(code)
w.events <- wde.KeyDownEvent(ke)
downKeys[ke.Key] = true
kpe := wde.KeyTypedEvent{
KeyEvent: ke,
Glyph: letterForCode(code),
Chord: wde.ConstructChord(downKeys),
}
w.events <- kpe
case xproto.KeyReleaseEvent:
var ke wde.KeyUpEvent
ke.Key = keyForCode(keybind.LookupString(w.xu, e.State, e.Detail))
delete(downKeys, ke.Key)
w.events <- ke
case xproto.KeymapNotifyEvent:
newDownKeys := make(map[string]bool)
for i := 0; i < len(e.Keys); i++ {
mask := e.Keys[i]
for j := 0; j < 8; j++ {
if mask&(1<<uint(j)) != 0 {
keycode := xproto.Keycode(8*(i+1) + j)
key := keyForCode(keybind.LookupString(w.xu, 0, keycode))
newDownKeys[key] = true
}
}
}
/* remove keys that are no longer pressed */
for key := range downKeys {
if _, ok := newDownKeys[key]; !ok {
var ke wde.KeyUpEvent
ke.Key = key
delete(downKeys, key)
w.events <- ke
}
}
/* add keys that are newly pressed */
for key := range newDownKeys {
if _, ok := downKeys[key]; !ok {
var ke wde.KeyDownEvent
ke.Key = key
downKeys[key] = true
w.events <- ke
}
}
case xproto.ConfigureNotifyEvent:
var re wde.ResizeEvent
re.Width = int(e.Width)
re.Height = int(e.Height)
if re.Width != w.width || re.Height != w.height {
w.width, w.height = re.Width, re.Height
w.bufferLck.Lock()
w.buffer.Destroy()
w.buffer = xgraphics.New(w.xu, image.Rect(0, 0, re.Width, re.Height))
w.bufferLck.Unlock()
w.events <- re
}
case xproto.ClientMessageEvent:
if icccm.IsDeleteProtocol(w.xu, xevent.ClientMessageEvent{&e}) {
w.events <- wde.CloseEvent{}
}
case xproto.DestroyNotifyEvent:
case xproto.ReparentNotifyEvent:
case xproto.MapNotifyEvent:
case xproto.UnmapNotifyEvent:
case xproto.PropertyNotifyEvent:
default:
fmt.Fprintf(os.Stderr, "unhandled event: type %T\n%+v\n", e, e)
}
}
close(w.events)
}