// DrawText is a convenience function that will create a new image, render
// the provided text to it, paint the image to the provided window, and resize
// the window to fit the text snugly.
//
// An error can occur when rendering the text to an image.
func DrawText(win *xwindow.Window, font *truetype.Font, size float64,
fontClr, bgClr render.Color, text string) error {
// BUG(burntsushi): If `text` is zero-length, very bad things happen.
if len(text) == 0 {
text = " "
}
// Over estimate the extents.
ew, eh := xgraphics.Extents(font, size, text)
// Create an image using the over estimated extents.
img := xgraphics.New(win.X, image.Rect(0, 0, ew, eh))
xgraphics.BlendBgColor(img, bgClr.ImageColor())
// Now draw the text, grab the (x, y) position advanced by the text, and
// check for an error in rendering.
_, _, err := img.Text(0, 0, fontClr.ImageColor(), size, font, text)
if err != nil {
return err
}
// Resize the window to the geometry determined by (x, y).
win.Resize(ew, eh)
// Now draw the image to the window and destroy it.
img.XSurfaceSet(win.Id)
// subimg := img.SubImage(image.Rect(0, 0, ew, eh))
img.XDraw()
img.XPaint(win.Id)
img.Destroy()
return nil
}
// DrawText is a convenience function that will create a new image, render
// the provided text to it, paint the image to the provided window, and resize
// the window to fit the text snugly.
//
// An error can occur when rendering the text to an image.
func DrawText(win *xwindow.Window, font *truetype.Font, size float64,
fontClr, bgClr color.RGBA, text string) error {
// Over estimate the extents.
ew, eh := xgraphics.TextMaxExtents(font, size, text)
eh += misc.TextBreathe // <-- this is the bug
// Create an image using the over estimated extents.
img := xgraphics.New(win.X, image.Rect(0, 0, ew, eh))
xgraphics.BlendBgColor(img, bgClr)
// Now draw the text, grab the (x, y) position advanced by the text, and
// check for an error in rendering.
x, y, err := img.Text(0, 0, fontClr, size, font, text)
if err != nil {
return err
}
// Resize the window to the geometry determined by (x, y).
w, h := x, y+misc.TextBreathe // <-- also part of the bug
win.Resize(w, h)
// Now draw the image to the window and destroy it.
img.XSurfaceSet(win.Id)
subimg := img.SubImage(image.Rect(0, 0, w, h))
subimg.XDraw()
subimg.XPaint(win.Id)
img.Destroy()
return nil
}
// Swap the position and size of the target and incoming windows
func Swap(target, incoming *xwindow.Window) error {
// get bounds for both windows
target_bounds, err := target.DecorGeometry()
if err != nil {
log.Printf("Swap: error getting bounds of target: %v\n", err)
return err
}
incoming_bounds, err := incoming.DecorGeometry()
if err != nil {
log.Printf("Swap: error getting bounds of incoming: %v\n", err)
return err
}
// configure windows, easy as pie!
err = MoveResize(target, incoming_bounds.X(), incoming_bounds.Y(),
incoming_bounds.Width(), incoming_bounds.Height())
if err != nil {
log.Printf("Swap: error configuring target: %v\n", err)
return err
}
err = MoveResize(incoming, target_bounds.X(), target_bounds.Y(),
target_bounds.Width(), target_bounds.Height())
if err != nil {
log.Printf("Swap: error configuring incoming: %v\n", err)
return err
}
// cool
return nil
}
// cutting windows in half on the Y axis
func splitHorizontal(target, incoming *xwindow.Window, incomingOnLeft bool) error {
bounds, err := target.DecorGeometry()
if err != nil {
log.Printf("splitHorizontal: error getting bounds of target: %v\n", err)
return err
}
left_width := bounds.Width() / 2
right_width := bounds.Width() - left_width
var left, right *xwindow.Window
if incomingOnLeft {
left = incoming
right = target
} else {
left = target
right = incoming
}
err = MoveResize(right, bounds.X()+left_width, bounds.Y(), right_width, bounds.Height())
if err != nil {
log.Printf("splitHorizontal: error configuring right: %v\n", err)
return err
}
err = MoveResize(left, bounds.X(), bounds.Y(), left_width, bounds.Height())
if err != nil {
log.Printf("splitHorizontal: error configuring left: %v\n", err)
return err
}
// cool
return nil
}
func newWindow(controlCh *controlCh, X *xgbutil.XUtil, width, height int) *xwindow.Window {
var (
err error
win *xwindow.Window
)
win, err = xwindow.Generate(X)
if err != nil {
panic(err)
}
win.Create(X.RootWin(), 0, 0, width, height,
xproto.CwBackPixel|xproto.CwEventMask,
0, xproto.EventMaskButtonRelease)
// Xorg application exits when the window is closed.
win.WMGracefulClose(
func(w *xwindow.Window) {
xevent.Detach(w.X, w.Id)
mousebind.Detach(w.X, w.Id)
w.Destroy()
xevent.Quit(X)
controlCh.exit <- true
})
// In order to get ConfigureNotify events, we must listen to the window
// using the 'StructureNotify' mask.
win.Listen(xproto.EventMaskButtonPress |
xproto.EventMaskButtonRelease |
xproto.EventMaskKeyPress |
xproto.EventMaskKeyRelease |
xproto.EventMaskStructureNotify)
win.Map()
return win
}
func Geometries(win *xwindow.Window) (xrect.Rect, xrect.Rect, error) {
decor, err := win.DecorGeometry()
if err != nil {
return nil, nil, err
}
base, err := win.Geometry()
if err != nil {
return nil, nil, err
}
return decor, base, nil
}
// same as above, but moveresize instead of just move at the first step,
// then resize to the provided w/h instead of a snapshotted one
// this implementation differs from Move in that it makes no effort to be end-synchronous
// This function waits only on the window's inner geometry resizing, not on actual movement occuring
func MoveResize(win *xwindow.Window, x, y, width, height int) error {
// snapshot window dimensions
base, err := win.Geometry()
if err != nil {
return err
}
// move window then wait...
err = win.WMMoveResize(x, y, width, height)
if err != nil {
return err
}
err = PollFor(win, GeometryDiffers(base))
if err != nil {
return err
}
// check that the new geometry is what we requested
// this may be inadvisable: what about window hints?
geom, err := win.Geometry()
if err != nil {
return err
}
if geom.Width() != width || geom.Height() != height {
// something derped! resize to make it right!
// if window hints constrained us, this won't upset them
log.Println("MoveResize: resizing again after incorrect new dimensions")
err = win.WMResize(width, height)
if err != nil {
return err
}
}
return nil
}
func newWindow(X *xgbutil.XUtil, width, height int) *xwindow.Window {
var (
err error
win *xwindow.Window
)
win, err = xwindow.Generate(X)
if err != nil {
log.Fatal(err)
}
win.Create(X.RootWin(), 0, 0, width, height,
xproto.CwBackPixel|xproto.CwEventMask,
0, xproto.EventMaskButtonRelease)
win.WMGracefulClose(
func(w *xwindow.Window) {
xevent.Detach(w.X, w.Id)
mousebind.Detach(w.X, w.Id)
w.Destroy()
xevent.Quit(X)
})
win.Map()
if err != nil {
log.Fatal(err)
}
return win
}
// Put the incoming window on the `dir` side of the target,
// and transform the orthagonal dimension (eg, if `dir` is Up, then dim is `Width`
// to be the same as the target's dimension
// TODO: clip windows to display boundry
func Shove(target, incoming *xwindow.Window, dir Direction) error {
// get geometries
i, err := incoming.DecorGeometry()
if err != nil {
return err
}
t, err := target.DecorGeometry()
if err != nil {
return err
}
// move in the correct direction
if dir == Top {
err := MoveResize(incoming, t.X(), t.Y()-i.Height(), t.Width(), i.Height())
if err != nil {
return err
}
}
if dir == Bottom {
err := MoveResize(incoming, t.X(), t.Y()+t.Height(), t.Width(), i.Height())
if err != nil {
return err
}
}
if dir == Left {
err := MoveResize(incoming, t.X()-i.Width(), t.Y(), i.Width(), t.Height())
if err != nil {
return err
}
}
if dir == Right {
err := MoveResize(incoming, t.X()+t.Width(), t.Y(), i.Width(), t.Height())
if err != nil {
return err
}
}
return nil
}
// move the incoming window so that it is directly adjacent to the target's edge
func AdjoinEdge(target, incoming *xwindow.Window, dir wm.Direction) error {
t, err := target.DecorGeometry()
if err != nil {
return err
}
i, err := incoming.DecorGeometry()
if err != nil {
return err
}
delta := EdgePos(t, dir) - EdgePos(i, dir.Opposite())
if dir == wm.Left || dir == wm.Right {
return wm.Move(incoming, delta+i.X(), i.Y())
} else {
return wm.Move(incoming, i.X(), delta+i.Y())
}
return nil
}
func newWindow(X *xgbutil.XUtil, width, height int) *xwindow.Window {
var (
err error
win *xwindow.Window
)
win, err = xwindow.Generate(X)
if err != nil {
log.Fatal(err)
}
win.Create(X.RootWin(), 0, 0, width, height,
xproto.CwBackPixel|xproto.CwEventMask,
0, xproto.EventMaskButtonRelease)
win.WMGracefulClose(
func(w *xwindow.Window) {
xevent.Detach(w.X, w.Id)
mousebind.Detach(w.X, w.Id)
// w.Destroy()
xevent.Quit(X)
application.Exit()
})
// In order to get ConfigureNotify events, we must listen to the window
// using the 'StructureNotify' mask.
win.Listen(xproto.EventMaskStructureNotify)
win.Map()
xevent.ConfigureNotifyFun(
func(X *xgbutil.XUtil, ev xevent.ConfigureNotifyEvent) {
reshape(int(ev.Width), int(ev.Height))
}).Connect(X, win.Id)
// err = mousebind.ButtonReleaseFun(
// func(X *xgbutil.XUtil, ev xevent.ButtonReleaseEvent) {
// newWindow(X)
// }).Connect(X, win.Id, "1", false, false)
if err != nil {
log.Fatal(err)
}
return win
}
func splitVertical(target, incoming *xwindow.Window, incomingOnTop bool) error {
bounds, err := target.DecorGeometry()
if err != nil {
log.Printf("splitVertical: error getting bounds of target: %v\n", err)
return err
}
bottom_height := bounds.Height() / 2
top_height := bounds.Height() - bottom_height
var top, bottom *xwindow.Window
if incomingOnTop {
top = incoming
bottom = target
} else {
top = target
bottom = incoming
}
// target goes on bottom...
err = MoveResize(bottom, bounds.X(), bounds.Y()+top_height, bounds.Width(), bottom_height)
if err != nil {
log.Printf("splitVertical: error configuring bottom: %v\n", err)
return err
}
// and incoming on top
err = MoveResize(top, bounds.X(), bounds.Y(), bounds.Width(), top_height)
if err != nil {
log.Printf("splitVertical: error configuring top: %v\n", err)
return err
}
// cool
return nil
}
// Sometimes window managers are really slow about
// re-implemented here because under Fluxbox, win.WMMove() results in the window
// growing vertically by the height of the titlebar!
// So we snapshot the size of the window before we move it,
// move it, compare the sizes, then resize it vertically to be in line with our intentions
//
// this is synchronous: it waits for the window to finish moving before it releases control
// because it would be impossible to selectivley poll for just the move.
func Move(win *xwindow.Window, x, y int) error {
// snapshot both sorts of window geometries
decor_geom, geom, err := Geometries(win)
if err != nil {
return err
}
log.Printf("Move: detected geometry to be %v\n", geom)
// move the window, then wait for it to finish moving
err = win.WMMove(x, y)
if err != nil {
return err
}
// this waits 30MS under non-Fluxbox window manager
// WHAT DO
err = PollFor(win, GeometryDiffers(geom))
if err != nil {
// if we had a timeout, that means that the geometry didn't derp during
// moving, and everything is A-OK!
// skip the rest of the function
if _, wasTimeout := err.(*TimeoutError); wasTimeout {
return nil
}
return err
}
// compare window widths before/after move
_, post_move_base, err := Geometries(win)
if err != nil {
return err
}
delta_w := post_move_base.Width() - geom.Width()
delta_h := post_move_base.Height() - geom.Height()
if delta_h != 0 || delta_w != 0 {
// fluxbox has done it again. We issued a move, and we got a taller window, too!
log.Printf("Move: resetting dimensions to %v due to w/h delta: %v/%v\n", geom, delta_w, delta_h)
err = win.WMResize(geom.Width(), geom.Height())
if err != nil {
return err
}
// wait for that to succeed
err = PollFor(win, GeometryDiffers(post_move_base))
if err != nil {
return err
}
}
// make sure window did actually move
err = PollFor(win, DecorDiffers(decor_geom))
if err != nil {
// if we had a timeout, that means that the window didn't move
// we want to send an error mentioning that fact specifically
// instead of a generic "lol timeout happan in polling :DDD"
if te, wasTimeout := err.(*TimeoutError); wasTimeout {
return &TimeoutError{"Move: window didn't move", te.Timeout}
}
// return whatever other error stymied the polling
return err
}
return nil
}
// resize a window by a certain number of pixels in a given direction.
// This function tries to prevent the window from moving
func ResizeDirection(X *xgbutil.XUtil, win *xwindow.Window, dir wm.Direction, px int) error {
// we resize around the decor_geometry of the window
if px == 0 {
// no need to resize
return nil
}
geom, err := win.Geometry()
if err != nil {
return fmt.Errorf("Resize: coudn't get normal geometry: %v", err)
}
w, h := geom.Width(), geom.Height()
log.Printf("ResizeDirection: pre_geom == %v\n", geom)
if dir == wm.Left || dir == wm.Right {
// horizontal resize
w += px
} else {
h += px
}
// two-step resize -> move process, to compensate for WM peculiarities and window sizing hints
// first save the initial position info
pre_decor, err := win.DecorGeometry()
if err != nil {
return fmt.Errorf("Resize: coudn't get decorated geometry: %v", err)
}
// resize the window
err = win.WMResize(w, h)
if err != nil {
return err
}
// wait for the geometry to change
// we use a goroutine to query X a bunch while waiting for the window
// to finish resizing
err = wm.PollFor(win, wm.DecorDiffers(pre_decor), wm.GeometryDiffers(geom))
if err != nil {
return fmt.Errorf("ResizeDirection: error waiting for window geometries to change: %v", err)
}
post_decor, post_geom, err := wm.Geometries(win)
if err != nil {
return err
}
log.Printf("ResizeDirection: post_decor == %v\n", post_decor)
log.Printf("ResizeDirection: post_geom == %v\n", post_geom)
// the opposite edge should stay in the same place
op := dir.Opposite()
pre_edge := EdgePos(pre_decor, op)
post_edge := EdgePos(post_decor, op)
delta := post_edge - pre_edge
x, y := post_decor.X(), post_decor.Y()
// move the window upwards by our height resize so that the bottom edge stays in the same place
if dir == wm.Top || dir == wm.Bottom {
y -= delta
}
// move the window right by our resize so that the right stays in the same place
if dir == wm.Left || dir == wm.Right {
x -= delta
}
// move to lock opposite edge
return wm.Move(win, x, y)
}