// 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)
}
func ManageResizingWindows(X *xgbutil.XUtil) {
var DRAG_DATA *ResizeDrag
handleDragStart := func(X *xgbutil.XUtil, rx, ry, ex, ey int) (cont bool, cursor xproto.Cursor) {
// get the clicked window
win, err := wm.FindManagedWindowUnderMouse(X)
if err != nil {
log.Printf("ResizeStart: couldn't find window under mouse: %v\n", err)
return false, 0
}
// get coordinates inside the clicked window
_, reply, err := wm.FindNextUnderMouse(X, win)
if err != nil {
log.Printf("ResizeStart: couldn't get coordinates of click inside win %v: %v\n", win, err)
return false, 0
}
// create an xwindow.Window so we can get a rectangle to find our bearings from
xwin := xwindow.New(X, win)
geom, err := xwin.DecorGeometry()
if err != nil {
log.Printf("ResizeStart: geometry error: %v\n", err)
return false, 0
}
// get what side of the rect our mouseclick was on
x, y := int(reply.WinX), int(reply.WinY)
dir := SideOfRectangle(geom, x, y)
// get coordinate part for the edge. this is either X or Y.
target_edge := EdgePos(geom, dir)
log.Printf("ResizeStart: on window %v - %v. Direction/edge: %v/%v\n", win, geom, dir, target_edge)
// find adjacent windows
adjacent := list.New()
// note that this is an intellegent request: the WM only gives us a list of visible, normal windows
// we don't have to worry about moving hidden windows or something
managed_windows, err := ewmh.ClientListGet(X)
if err != nil {
// we can safley ignore this error, because then we just fall back to resizing only this window
log.Printf("ResizeStart: error getting EWMH client list: %v\n", err)
} else {
// select managed windows
// always enough space
// TODO: don't grossly overallocate
for _, candidate_id := range managed_windows {
// no need to run calculations for ourself!
if candidate_id == win {
continue
}
cand_window := xwindow.New(X, candidate_id)
cand_geom, err := cand_window.DecorGeometry()
if err != nil {
log.Printf("ResizeStart: couldn't get geometry for ajacency candidate %v: %v\n", candidate_id, err)
continue
}
cand_edge := EdgePos(cand_geom, dir.Opposite())
if abs(cand_edge-target_edge) <= AdjacencyEpsilon {
// cool, edges are touching.
// make sure this window isn't totally above or below the candidate
// we do so by constructing a rect using the clicked window's edge
// and the candidate's orthagonal dimension
// if the rect overlaps, then this window is truly adjacent
//
// TODO: consider adding a mimumum overlap
if dir == wm.Top || dir == wm.Bottom {
// measuring X coords
if EdgePos(cand_geom, wm.Right) < EdgePos(geom, wm.Left) {
continue
}
if EdgePos(cand_geom, wm.Left) > EdgePos(geom, wm.Right) {
continue
}
} else {
if EdgePos(cand_geom, wm.Bottom) < EdgePos(geom, wm.Top) {
continue
}
if EdgePos(cand_geom, wm.Top) > EdgePos(geom, wm.Bottom) {
continue
}
}
// if a window has made it to here, it is adgacent!
// add it to the list
log.Printf("ResizeStart: will resize adjacent window: %v - %v\n", candidate_id, cand_geom)
adjacent.PushBack(cand_window)
}
}
}
// construct the drag data
data := ResizeDrag{xwin, dir, adjacent, rx, ry}
DRAG_DATA = &data
// TODO: finish this
// create an edge
// find the adjacent windows
// start the drag
return true, 0
}
handleResize := func(rx, ry int) {
delta := rx - DRAG_DATA.LastX
if DRAG_DATA.Direction == wm.Top || DRAG_DATA.Direction == wm.Bottom {
delta = ry - DRAG_DATA.LastY
}
if DRAG_DATA.Direction == wm.Left || DRAG_DATA.Direction == wm.Top {
delta = delta * -1
}
target_geom, err := DRAG_DATA.Window.DecorGeometry()
if err != nil {
log.Printf("Geom retrieve err: %v\n", err)
return
}
target_edge := EdgePos(target_geom, DRAG_DATA.Direction)
// resize the target by the delta
err = ResizeDirection(X, DRAG_DATA.Window, DRAG_DATA.Direction, delta)
if err != nil {
log.Printf("ResizeStep: can't resize target: %v\n", err)
return
}
// calculate actual delta that occured, for resizing the adjacent windows
// handles issues with window sizing hints on windows like terminals
// making big differences for us
target_geom_a, err := DRAG_DATA.Window.DecorGeometry()
if err != nil {
log.Printf("ResizeStep: Geom retrieve err: %v\n", err)
return
}
target_edge_a := EdgePos(target_geom_a, DRAG_DATA.Direction)
delta = target_edge_a - target_edge
if DRAG_DATA.Direction == wm.Left || DRAG_DATA.Direction == wm.Top {
delta = delta * -1
}
// resize each adjacent window by the opposite
for e := DRAG_DATA.Adjacent.Front(); e != nil; e = e.Next() {
// extract window from the linked list
adj_win := e.Value.(*xwindow.Window)
adj_geom, err := adj_win.DecorGeometry()
if err != nil {
log.Printf("ResizeStep: can't query adjacent window %v geometry: %v", adj_win, err)
}
log.Printf("ResizeStep: resizing adjacent window %v - %v: edge/delta %v/%v\n", adj_win.Id, adj_geom, DRAG_DATA.Direction.Opposite(), -delta)
// resize in the opposite direction, with the opposite delta
// except the delta should be some actual delta calculated from our source window,
// because issues with terminal windows happen
err = ResizeDirection(X, adj_win, DRAG_DATA.Direction.Opposite(), -delta)
// then to garuntee the edges touch...
AdjoinEdge(DRAG_DATA.Window, adj_win, DRAG_DATA.Direction)
if err != nil {
log.Printf("ResizeStep: can't resize adjacent window %v: %v\n", adj_win, err)
continue
}
}
// save new coordinates
DRAG_DATA.LastX = rx
DRAG_DATA.LastY = ry
}
handleDragStep := func(X *xgbutil.XUtil, rx, ry, ex, ey int) {
if DynamicDragResize {
handleResize(rx, ry)
}
}
handleDragEnd := func(X *xgbutil.XUtil, rx, ry, ex, ey int) {
// only run on high enough deltas. Prevents windows from resizing when the user has gone "nah."
// use the adjacency epsilon here too
delta := abs(rx - DRAG_DATA.LastX)
if DRAG_DATA.Direction == wm.Top || DRAG_DATA.Direction == wm.Bottom {
delta = abs(ry - DRAG_DATA.LastY)
}
if delta > AdjacencyEpsilon {
handleResize(rx, ry)
} else {
log.Printf("ResizeEnd: delta %v less than epsilon %v, skipping resize\n", delta, AdjacencyEpsilon)
}
DRAG_DATA = nil
}
// resizes the window by 1px vertically, then observes the actual change
resizeBugHunt := func(X *xgbutil.XUtil, ev xevent.ButtonPressEvent) {
// get xwindow from click
clicked, err := wm.FindManagedWindowUnderMouse(X)
if err != nil {
log.Println(err)
return
}
win := xwindow.New(X, clicked)
names := []string{"PreDecor", "PostDecorPreMove", "PostDecor", "Pre", "Post"}
geometries := make(map[string]xrect.Rect, 4)
// take measurements
pre_decor, err := win.DecorGeometry()
if err != nil {
log.Printf("Error fetching pre DecorGeom: %v\n", err)
}
geometries["PreDecor"] = pre_decor
geo, err := win.Geometry()
if err != nil {
log.Printf("Error fetching pre Geom: %v\n", err)
}
geometries["Pre"] = geo
// resize vertically by 1px
log.Println("Resizing using window.Geometry() + 50, not DecorGeometry() + 1")
//err = win.WMResize(geo.Width() + 50, geo.Height())
if err != nil {
log.Println(err)
}
// wait to finish
err = wm.PollFor(win, wm.GeometryDiffers(geo), wm.DecorDiffers(pre_decor))
if err != nil {
log.Printf("Oops wjile waiting for resizing and things: %v\n", err)
}
post_decor_pre_move, _, err := wm.Geometries(win)
if err != nil {
log.Println(err)
post_decor_pre_move = pre_decor
}
geometries["PostDecorPreMove"] = post_decor_pre_move
// move zero pixels, then wait
err = wm.Move(win, post_decor_pre_move.X(), post_decor_pre_move.Y())
if err != nil {
log.Printf("error in wm.Move zero px: %v\n", err)
}
geo, err = win.DecorGeometry()
if err != nil {
log.Printf("Error fetching post DecorGeom: %v\n", err)
}
geometries["PostDecor"] = geo
geo, err = win.Geometry()
if err != nil {
log.Printf("Error fetching post Geom: %v\n", err)
}
geometries["Post"] = geo
for _, k := range names {
log.Printf("%s: %v\n", k, geometries[k])
}
// release X events
// needed if the event binding is synchronous
// see http://godoc.burntsushi.net/pkg/github.com/BurntSushi/xgbutil/mousebind/#hdr-When_to_use_a_synchronous_binding
// xproto.AllowEvents(X.Conn(), xproto.AllowReplayPointer, 0)
}
// bind handler
mousebind.Drag(X, X.RootWin(), X.RootWin(), KeyComboResize, true,
handleDragStart,
handleDragStep,
handleDragEnd)
mousebind.ButtonPressFun(resizeBugHunt).Connect(X, X.RootWin(), ui.KeyOption+"-Shift-Control-1", false, true)
}