// Ungrab undoes Grab. It will handle all combinations of modifiers found
// in xevent.IgnoreMods.
func Ungrab(xu *xgbutil.XUtil, win xproto.Window, mods uint16,
button xproto.Button) {
for _, m := range xevent.IgnoreMods {
xproto.UngrabButtonChecked(xu.Conn(), byte(button), win, mods|m).Check()
}
}
// compose a number of rectabgles into a window shape
func ComposeShape(X *xgbutil.XUtil, dst xproto.Window, rects []xrect.Rect) (err error) {
combine_bounds := make([]shape.CombineCookie, len(rects))
combine_clip := make([]shape.CombineCookie, len(rects))
var operation shape.Op
for i, rect := range rects {
// make rectangular window of correct goemetry
win, err := xwindow.Generate(X)
if err != nil {
log.Fatalf("ComposeShape: Error creating rectange %v window.", rect)
return err
}
win.Create(X.RootWin(), rect.X(), rect.Y(), rect.Width(), rect.Height(), xproto.CwBackPixel, 0xffffff)
// choose operation. on the first one, we want to set the shape.
if i == 0 {
operation = shape.SoSet
} else {
operation = shape.SoUnion
}
// combine window request
x, y := int16(rect.X()), int16(rect.Y())
combine_kind := shape.Kind(shape.SkBounding)
combine_bounds[i] = shape.CombineChecked(X.Conn(), operation, combine_kind, combine_kind, dst, x, y, win.Id)
combine_kind = shape.Kind(shape.SkClip)
combine_clip[i] = shape.CombineChecked(X.Conn(), operation, combine_kind, combine_kind, dst, x, y, win.Id)
}
return nil
}
// Ungrab undoes Grab. It will handle all combinations od modifiers found
// in xevent.IgnoreMods.
func Ungrab(xu *xgbutil.XUtil, win xproto.Window,
mods uint16, key xproto.Keycode) {
for _, m := range xevent.IgnoreMods {
xproto.UngrabKeyChecked(xu.Conn(), key, win, mods|m).Check()
}
}
func newParent(X *xgbutil.XUtil, cid xproto.Window) (*Parent, error) {
parent, err := xwindow.Generate(X)
if err != nil {
logger.Error.Printf("Could not create a parent window for client "+
"with id '%d' because: %s", cid, err)
logger.Error.Fatalf("In a state where no new windows can be created. " +
"Unfortunately, we must exit.")
}
err = parent.CreateChecked(X.RootWin(), 0, 0, 1, 1,
xproto.CwEventMask,
xproto.EventMaskSubstructureRedirect|
xproto.EventMaskButtonPress|xproto.EventMaskButtonRelease)
if err != nil {
return nil, err
}
err = xproto.ReparentWindowChecked(X.Conn(),
cid, parent.Id, 0, 0).Check()
if err != nil {
return nil, err
}
return &Parent{parent}, nil
}
// GrabKeyboard grabs the entire keyboard.
// Returns whether GrabStatus is successful and an error if one is reported by
// XGB. It is possible to not get an error and the grab to be unsuccessful.
// The purpose of 'win' is that after a grab is successful, ALL Key*Events will
// be sent to that window. Make sure you have a callback attached :-)
func GrabKeyboard(xu *xgbutil.XUtil, win xproto.Window) error {
reply, err := xproto.GrabKeyboard(xu.Conn(), false, win, 0,
xproto.GrabModeAsync, xproto.GrabModeAsync).Reply()
if err != nil {
return fmt.Errorf("GrabKeyboard: Error grabbing keyboard on "+
"window '%x': %s", win, err)
}
switch reply.Status {
case xproto.GrabStatusSuccess:
// all is well
case xproto.GrabStatusAlreadyGrabbed:
return fmt.Errorf("GrabKeyboard: Could not grab keyboard. " +
"Status: AlreadyGrabbed.")
case xproto.GrabStatusInvalidTime:
return fmt.Errorf("GrabKeyboard: Could not grab keyboard. " +
"Status: InvalidTime.")
case xproto.GrabStatusNotViewable:
return fmt.Errorf("GrabKeyboard: Could not grab keyboard. " +
"Status: NotViewable.")
case xproto.GrabStatusFrozen:
return fmt.Errorf("GrabKeyboard: Could not grab keyboard. " +
"Status: Frozen.")
}
return nil
}
// NewDrawable converts an X drawable into a xgraphics.Image.
// This is used in NewIcccmIcon.
func NewDrawable(X *xgbutil.XUtil, did xproto.Drawable) (*Image, error) {
// Get the geometry of the pixmap for use in the GetImage request.
pgeom, err := xwindow.RawGeometry(X, xproto.Drawable(did))
if err != nil {
return nil, err
}
// Get the image data for each pixmap.
pixmapData, err := xproto.GetImage(X.Conn(), xproto.ImageFormatZPixmap,
did,
0, 0, uint16(pgeom.Width()), uint16(pgeom.Height()),
(1<<32)-1).Reply()
if err != nil {
return nil, err
}
// Now create the xgraphics.Image and populate it with data from
// pixmapData and maskData.
ximg := New(X, image.Rect(0, 0, pgeom.Width(), pgeom.Height()))
// We'll try to be a little flexible with the image format returned,
// but not completely flexible.
err = readDrawableData(X, ximg, did, pixmapData,
pgeom.Width(), pgeom.Height())
if err != nil {
return nil, err
}
return ximg, nil
}
// CreateCursorExtra features all available parameters to creating a cursor.
// It will return an error if there is a problem with any of the requests
// made to create the cursor.
// (This implies each request is a checked request. The performance loss is
// probably acceptable since cursors should be created once and reused.)
func CreateCursorExtra(xu *xgbutil.XUtil, cursor, foreRed, foreGreen,
foreBlue, backRed, backGreen, backBlue uint16) (xproto.Cursor, error) {
fontId, err := xproto.NewFontId(xu.Conn())
if err != nil {
return 0, err
}
cursorId, err := xproto.NewCursorId(xu.Conn())
if err != nil {
return 0, err
}
err = xproto.OpenFontChecked(xu.Conn(), fontId,
uint16(len("cursor")), "cursor").Check()
if err != nil {
return 0, err
}
err = xproto.CreateGlyphCursorChecked(xu.Conn(), cursorId, fontId, fontId,
cursor, cursor+1,
foreRed, foreGreen, foreBlue,
backRed, backGreen, backBlue).Check()
if err != nil {
return 0, err
}
err = xproto.CloseFontChecked(xu.Conn(), fontId).Check()
if err != nil {
return 0, err
}
return cursorId, nil
}
// Generate is just like New, but generates a new X resource id for you.
// Geom is initialized to (0, 0) 1x1.
// It is possible for id generation to return an error, in which case, an
// error is returned here.
func Generate(xu *xgbutil.XUtil) (*Window, error) {
wid, err := xproto.NewWindowId(xu.Conn())
if err != nil {
return nil, err
}
return New(xu, wid), nil
}
// PhyiscalHeads returns the list of heads in a physical ordering.
// Namely, left to right then top to bottom. (Defined by (X, Y).)
// Xinerama must have been initialized, otherwise the xinerama.QueryScreens
// request will panic.
// PhysicalHeads also checks to make sure each rectangle has a unique (x, y)
// tuple, so as not to return the geometry of cloned displays.
// (At present moment, xgbutil initializes Xinerama automatically during
// initial connection.)
func PhysicalHeads(xu *xgbutil.XUtil) (Heads, error) {
xinfo, err := xinerama.QueryScreens(xu.Conn()).Reply()
if err != nil {
return nil, err
}
hds := make(Heads, 0)
for _, info := range xinfo.ScreenInfo {
head := xrect.New(int(info.XOrg), int(info.YOrg),
int(info.Width), int(info.Height))
// Maybe Xinerama is enabled, but we have cloned displays...
unique := true
for _, h := range hds {
if h.X() == head.X() && h.Y() == head.Y() {
unique = false
break
}
}
if unique {
hds = append(hds, head)
}
}
sort.Sort(hds)
return hds, nil
}
// Grab grabs a key with mods on a particular window.
// This will also grab all combinations of modifiers found in xevent.IgnoreMods.
func Grab(xu *xgbutil.XUtil, win xproto.Window,
mods uint16, key xproto.Keycode) {
for _, m := range xevent.IgnoreMods {
xproto.GrabKey(xu.Conn(), true, win, mods|m, key,
xproto.GrabModeAsync, xproto.GrabModeAsync)
}
}
// RawGeometry isn't smart. It just queries the window given for geometry.
func RawGeometry(xu *xgbutil.XUtil, win xproto.Drawable) (xrect.Rect, error) {
xgeom, err := xproto.GetGeometry(xu.Conn(), win).Reply()
if err != nil {
return nil, err
}
return xrect.New(int(xgeom.X), int(xgeom.Y),
int(xgeom.Width), int(xgeom.Height)), nil
}
func clientMessage(X *xgbutil.XUtil, event xgb.Event) {
ev := event.(xproto.ClientMessageEvent)
cookie := xproto.GetAtomName(X.Conn(), ev.Type)
reply, _ := cookie.Reply()
log.WithFields(log.Fields{
"name": reply.Name,
"data": ev.Data,
}).Info("client Message:", ev)
}
// translate an X, Y value from one window to the euclidean space of another. Useful for translating
// the arbitrary position of some window's (0,0) point into root window space
func TranslateCoordinatesSync(X *xgbutil.XUtil, src, dest xproto.Window, x, y int) (dest_x, dest_y int, err error) {
Xx, Xy := int16(x), int16(y)
cookie := xproto.TranslateCoordinates(X.Conn(), src, dest, Xx, Xy)
reply, err := cookie.Reply()
if err != nil {
return 0, 0, err
}
dest_x, dest_y = int(reply.DstX), int(reply.DstY)
return
}
// wrapper around xproto.QueryPointer that performs a simple synchronous query
func FindNextUnderMouse(X *xgbutil.XUtil, parent xproto.Window) (xproto.Window, *xproto.QueryPointerReply, error) {
// start query pointer request
cookie := xproto.QueryPointer(X.Conn(), parent)
// block and get reply for client
reply, err := cookie.Reply()
if err != nil {
return 0, nil, err
}
return reply.Child, reply, nil
}
// currentTime forcefully causes a PropertyNotify event to fire on the root
// window, then scans the event queue and picks up the time.
//
// It is NOT SAFE to call this function in a place other than Wingo's
// initialization. Namely, this function subverts xevent's queue and reads
// events directly from X.
func currentTime(X *xgbutil.XUtil) (xproto.Timestamp, error) {
wmClassAtom, err := xprop.Atm(X, "WM_CLASS")
if err != nil {
return 0, err
}
stringAtom, err := xprop.Atm(X, "STRING")
if err != nil {
return 0, err
}
// Make sure we're listening to PropertyChange events on the root window.
err = xwindow.New(X, X.RootWin()).Listen(xproto.EventMaskPropertyChange)
if err != nil {
return 0, fmt.Errorf(
"Could not listen to Root window events (PropertyChange): %s", err)
}
// Do a zero-length append on a property as suggested by ICCCM 2.1.
err = xproto.ChangePropertyChecked(
X.Conn(), xproto.PropModeAppend, X.RootWin(),
wmClassAtom, stringAtom, 8, 0, nil).Check()
if err != nil {
return 0, err
}
// Now look for the PropertyNotify generated by that zero-length append
// and return the timestamp attached to that event.
// Note that we do this outside of xgbutil/xevent, since ownership
// is literally the first thing we do after connecting to X.
// (i.e., we don't have our event handling system initialized yet.)
timeout := time.After(3 * time.Second)
for {
select {
case <-timeout:
return 0, fmt.Errorf(
"Expected a PropertyNotify event to get a valid timestamp, " +
"but never received one.")
default:
ev, err := X.Conn().PollForEvent()
if err != nil {
continue
}
if propNotify, ok := ev.(xproto.PropertyNotifyEvent); ok {
X.TimeSet(propNotify.Time) // why not?
return propNotify.Time, nil
}
time.Sleep(100 * time.Millisecond)
}
}
panic("unreachable")
}
// GrabPointer grabs the entire pointer.
// Returns whether GrabStatus is successful and an error if one is reported by
// XGB. It is possible to not get an error and the grab to be unsuccessful.
// The purpose of 'win' is that after a grab is successful, ALL Button*Events
// will be sent to that window. Make sure you have a callback attached :-)
func GrabPointer(xu *xgbutil.XUtil, win xproto.Window, confine xproto.Window,
cursor xproto.Cursor) (bool, error) {
reply, err := xproto.GrabPointer(xu.Conn(), false, win, pointerMasks,
xproto.GrabModeAsync, xproto.GrabModeAsync,
confine, cursor, 0).Reply()
if err != nil {
return false, fmt.Errorf("GrabPointer: Error grabbing pointer on "+
"window '%x': %s", win, err)
}
return reply.Status == xproto.GrabStatusSuccess, nil
}
// Grab grabs a button with mods on a particular window.
// Will also grab all combinations of modifiers found in xevent.IgnoreMods
// If 'sync' is True, then no further events can be processed until the
// grabbing client allows them to be. (Which is done via AllowEvents. Thus,
// if sync is True, you *must* make some call to AllowEvents at some
// point, or else your client will lock.)
func Grab(xu *xgbutil.XUtil, win xproto.Window, mods uint16,
button xproto.Button, sync bool) {
var pSync byte = xproto.GrabModeAsync
if sync {
pSync = xproto.GrabModeSync
}
for _, m := range xevent.IgnoreMods {
xproto.GrabButton(xu.Conn(), true, win, pointerMasks, pSync,
xproto.GrabModeAsync, 0, 0, byte(button), mods|m)
}
}
// GrabChecked Grabs a key with mods on a particular window.
// This is the same as Grab, except that it issue a checked request.
// Which means that an error could be returned and handled on the spot.
// (Checked requests are slower than unchecked requests.)
// This will also grab all combinations of modifiers found in xevent.IgnoreMods.
func GrabChecked(xu *xgbutil.XUtil, win xproto.Window,
mods uint16, key xproto.Keycode) error {
var err error
for _, m := range xevent.IgnoreMods {
err = xproto.GrabKeyChecked(xu.Conn(), true, win, mods|m, key,
xproto.GrabModeAsync, xproto.GrabModeAsync).Check()
if err != nil {
return err
}
}
return nil
}
func GetOutputs(X *xgbutil.XUtil) (outputs []*randr.GetOutputInfoReply) {
resources, err := randr.GetScreenResources(X.Conn(), X.RootWin()).Reply()
if err != nil {
return nil
}
for _, output := range resources.Outputs {
oinfo, err := randr.GetOutputInfo(X.Conn(), output, 0).Reply()
if err != nil {
return nil
}
outputs = append(outputs, oinfo)
}
return outputs
}
func handleMotionNotify(X *xgbutil.XUtil, ev xevent.MotionNotifyEvent) {
qp, err := xproto.QueryPointer(X.Conn(), X.RootWin()).Reply()
if err != nil {
logger.Warning.Printf("Could not query pointer: %s", err)
return
}
geom := xrect.New(int(qp.RootX), int(qp.RootY), 1, 1)
if wrk := wm.Heads.FindMostOverlap(geom); wrk != nil {
if wrk != wm.Workspace() {
wm.SetWorkspace(wrk, false)
wm.FocusFallback()
}
}
}
// NewBackground creates an xgraphics.Image which spans the entire screen,
// initialized to black.
func NewBackground(X *xgbutil.XUtil) (*xgraphics.Image, error) {
res, err := randr.GetScreenResources(X.Conn(), X.RootWin()).Reply()
if err != nil {
return nil, err
}
var bgRect image.Rectangle
for _, output := range res.Outputs {
r, err := util.OutputRect(X, output)
// NOTE: It doesn't really matter if this returns a Zero Rectangle.
if err != nil {
return nil, err
}
bgRect = bgRect.Union(r)
}
return xgraphics.New(X, bgRect), nil
}
// announce sends a ClientMessage event to the root window to let everyone
// know that Wingo is the boss. (As per ICCCM 2.8.)
func announce(X *xgbutil.XUtil) {
typAtom, err := xprop.Atm(X, "MANAGER")
if err != nil {
logger.Warning.Println(err)
return
}
manSelAtom, err := managerAtom(X)
if err != nil {
logger.Warning.Println(err)
return
}
cm, err := xevent.NewClientMessage(32, X.RootWin(), typAtom,
int(X.TimeGet()), int(manSelAtom), int(X.Dummy()))
xproto.SendEvent(X.Conn(), false, X.RootWin(),
xproto.EventMaskStructureNotify, string(cm.Bytes()))
}
func (b *brightness) adjust(Xu *xgbutil.XUtil, increase bool) error {
X := Xu.Conn()
root := xproto.Setup(X).DefaultScreen(X).Root
screens, err := randr.GetScreenResources(X, root).Reply()
if err != nil {
return fmt.Errorf("getting screen: %v", err)
}
for _, output := range screens.Outputs {
query, err := randr.QueryOutputProperty(X, output, b.prop).Reply()
if err != nil {
if _, ok := err.(xproto.NameError); ok {
// this output has no backlight
continue
}
return fmt.Errorf("query backlight: %v", err)
}
if !query.Range {
return errors.New("backlight brightness range not specified")
}
if len(query.ValidValues) != 2 {
return fmt.Errorf("expected min and max, got: %v", query.ValidValues)
}
min, max := query.ValidValues[0], query.ValidValues[1]
// log.Printf("backlight range: %d .. %d", min, max)
get, err := randr.GetOutputProperty(X, output, b.prop, xproto.AtomNone, 0, 4, false, false).Reply()
if err != nil {
return fmt.Errorf("get backlight property: %v", err)
}
if get.Type != xproto.AtomInteger ||
get.NumItems != 1 ||
get.Format != 32 {
return fmt.Errorf("backlight property value looks wrong")
}
old := *(*int32)(unsafe.Pointer(&get.Data[0]))
// log.Printf("backlight data: %d", old)
bri := delta5(old, min, max, increase)
data := (*[4]byte)(unsafe.Pointer(&bri))[:]
if err := randr.ChangeOutputPropertyChecked(X, output, b.prop, xproto.AtomInteger, 32, xproto.PropModeReplace, 1, data).Check(); err != nil {
return err
}
}
return nil
}
// ChangeProperty abstracts the semi-nastiness of xgb.ChangeProperty.
func ChangeProp(xu *xgbutil.XUtil, win xproto.Window, format byte, prop string,
typ string, data []byte) error {
propAtom, err := Atm(xu, prop)
if err != nil {
return err
}
typAtom, err := Atm(xu, typ)
if err != nil {
return err
}
return xproto.ChangePropertyChecked(xu.Conn(), xproto.PropModeReplace, win,
propAtom, typAtom, format,
uint32(len(data)/(int(format)/8)), data).Check()
}
func newParent(X *xgbutil.XUtil, cid xproto.Window) (*Parent, error) {
parent, err := xwindow.Generate(X)
if err != nil {
logger.Error.Printf("Could not create a parent window for client "+
"with id '%d' because: %s", cid, err)
logger.Error.Fatalf("In a state where no new windows can be created. " +
"Unfortunately, we must exit.")
}
// clientAttrs, err := xproto.GetWindowAttributes(X.Conn(), cid).Reply()
// if err != nil {
// return nil, fmt.Errorf("Could not get window attributes: %s", err)
// }
// visual := clientAttrs.Visual
// vdepth := getVisualDepth(X, visual)
visual := X.Screen().RootVisual
vdepth := X.Screen().RootDepth
// logger.Debug.Printf("Visualid: %x, Depth: %d", visual, vdepth)
err = xproto.CreateWindowChecked(X.Conn(),
vdepth, parent.Id, X.RootWin(),
0, 0, 1, 1, 0, xproto.WindowClassInputOutput, visual,
xproto.CwEventMask,
[]uint32{
xproto.EventMaskSubstructureRedirect |
xproto.EventMaskButtonPress |
xproto.EventMaskButtonRelease |
xproto.EventMaskFocusChange,
}).Check()
if err != nil {
return nil, fmt.Errorf("Could not create window: %s", err)
}
err = xproto.ReparentWindowChecked(X.Conn(),
cid, parent.Id, 0, 0).Check()
if err != nil {
return nil, fmt.Errorf("Could not reparent window: %s", err)
}
return &Parent{
Window: parent,
MoveState: &MoveState{},
ResizeState: &ResizeState{},
isMapped: false,
}, nil
}
// AtomName fetches a string representation of an ATOM given its integer id.
func AtomName(xu *xgbutil.XUtil, aid xproto.Atom) (string, error) {
// Check the cache first
if atomName, ok := atomNameGet(xu, aid); ok {
return string(atomName), nil
}
reply, err := xproto.GetAtomName(xu.Conn(), aid).Reply()
if err != nil {
return "", fmt.Errorf("AtomName: Error fetching name for ATOM "+
"id '%d': %s", aid, err)
}
// If we're here, it means we didn't have ths ATOM id cached. So cache it.
atomName := string(reply.Name)
cacheAtom(xu, atomName, aid)
return atomName, nil
}
// GrabChecked grabs a button with mods on a particular window. It does the
// same thing as Grab, but issues a checked request and returns an error
// on failure.
// Will also grab all combinations of modifiers found in xevent.IgnoreMods
// If 'sync' is True, then no further events can be processed until the
// grabbing client allows them to be. (Which is done via AllowEvents. Thus,
// if sync is True, you *must* make some call to AllowEvents at some
// point, or else your client will lock.)
func GrabChecked(xu *xgbutil.XUtil, win xproto.Window, mods uint16,
button xproto.Button, sync bool) error {
var pSync byte = xproto.GrabModeAsync
if sync {
pSync = xproto.GrabModeSync
}
var err error
for _, m := range xevent.IgnoreMods {
err = xproto.GrabButtonChecked(xu.Conn(), true, win, pointerMasks,
pSync, xproto.GrabModeAsync, 0, 0, byte(button), mods|m).Check()
if err != nil {
return err
}
}
return nil
}
func socketFilePath(X *xgbutil.XUtil) string {
xc := X.Conn()
name := fmt.Sprintf(":%d.%d", xc.DisplayNumber, xc.DefaultScreen)
var runtimeDir string
xdgRuntime := os.Getenv("XDG_RUNTIME_DIR")
if len(xdgRuntime) > 0 {
runtimeDir = path.Join(xdgRuntime, "wingo")
} else {
runtimeDir = path.Join(os.TempDir(), "wingo")
}
if err := os.MkdirAll(runtimeDir, 0777); err != nil {
logger.Error.Fatalf("Could not create directory '%s': %s",
runtimeDir, err)
}
return path.Join(runtimeDir, name)
}
// Atom interns an atom and panics if there is any error.
func Atom(xu *xgbutil.XUtil, name string,
onlyIfExists bool) (xproto.Atom, error) {
// Check the cache first
if aid, ok := atomGet(xu, name); ok {
return aid, nil
}
reply, err := xproto.InternAtom(xu.Conn(), onlyIfExists,
uint16(len(name)), name).Reply()
if err != nil {
return 0, fmt.Errorf("Atom: Error interning atom '%s': %s", name, err)
}
// If we're here, it means we didn't have this atom cached. So cache it!
cacheAtom(xu, name, reply.Atom)
return reply.Atom, nil
}
func newBrightness(Xu *xgbutil.XUtil) (*brightness, error) {
const atomName = "Backlight"
atomReply, err := xproto.InternAtom(Xu.Conn(), true, uint16(len(atomName)), atomName).Reply()
if err != nil {
return nil, fmt.Errorf("no backlight: %v", err)
}
b := &brightness{
prop: atomReply.Atom,
}
if err := bind(Xu,
binding{"XF86MonBrightnessUp", b.up},
binding{"XF86MonBrightnessDown", b.down},
); err != nil {
return nil, err
}
return b, nil
}
