// 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
}
func (c *Client) cbShapeNotify() xevent.ShapeNotifyFun {
var err error
f := func(X *xgbutil.XUtil, ev xevent.ShapeNotifyEvent) {
// Many thanks to Openbox. I'll followed their lead.
xoff, yoff := int16(c.frame.Left()), int16(c.frame.Top())
// var xoff, yoff int16 = 0, 0
// Update the client's shaped status.
c.shaped = ev.Shaped
// If the client is no longer shaped, clear the mask.
if !c.shaped {
err = shape.MaskChecked(wm.X.Conn(),
shape.SoSet, ev.ShapeKind, c.frame.Parent().Id,
xoff, yoff, xproto.PixmapNone).Check()
if err != nil {
logger.Warning.Printf("Error clearing Shape mask on '%s': %s",
c, err)
}
return
}
// Now we have to shape the frame like the client.
err = shape.CombineChecked(wm.X.Conn(),
shape.SoSet, ev.ShapeKind, ev.ShapeKind,
c.frame.Parent().Id, xoff, yoff, c.Id()).Check()
if err != nil {
logger.Warning.Printf("Error combining on '%s': %s", c, err)
return
}
// If the client is being shaped and claims that it doesn't want
// decorations, make sure it has "nada" instead of "slim".
// We do this on startup, but maybe the client didn't say anything
// about shaping then...
// if !c.shouldDecor() {
// c.FrameNada()
// }
// We don't even bother with shaping the frame if the client has any
// kind of decoration. Unless I'm mistaken, shaping Wingo's decorations
// to fit client shaping really isn't going to do anything...
if _, ok := c.frame.(*frame.Nada); ok {
return
}
// So this is only done with Slim/Borders/Full frames. It basically
// negates the effects of shaping since we use one monolithic
// rectangle.
rect := xproto.Rectangle{
X: 0,
Y: 0,
Width: uint16(c.frame.Geom().Width()),
Height: uint16(c.frame.Geom().Height()),
}
err = shape.RectanglesChecked(wm.X.Conn(),
shape.SoUnion, shape.SkBounding, xproto.ClipOrderingUnsorted,
c.frame.Parent().Id, 0, 0, []xproto.Rectangle{rect}).Check()
if err != nil {
logger.Warning.Printf("Error adding rectangles on '%s': %s", c, err)
return
}
}
return xevent.ShapeNotifyFun(f)
}