1 #include "../kernel/dispatch.h"
2 #include "../kernel/client.h"
3 #include "../kernel/frame.h"
4 #include "../kernel/stacking.h"
5 #include "../kernel/screen.h"
8 void plugin_setup_config()
12 static int resistance
= 10;
13 static gboolean window_resistance
= TRUE
; /* window-to-window */
15 static void resist(Client
*c
, int *x
, int *y
)
19 int l
, t
, r
, b
; /* requested edges */
20 int al
, at
, ar
, ab
; /* screen area edges */
21 int cl
, ct
, cr
, cb
; /* current edges */
22 int w
, h
; /* current size */
23 gboolean snapx
= FALSE
, snapy
= FALSE
;
25 w
= c
->frame
->area
.width
;
26 h
= c
->frame
->area
.height
;
33 cl
= c
->frame
->area
.x
;
34 ct
= c
->frame
->area
.y
;
35 cr
= cl
+ c
->frame
->area
.width
- 1;
36 cb
= ct
+ c
->frame
->area
.height
- 1;
38 /* snap to other clients */
39 if (window_resistance
)
40 for (it
= stacking_list
; it
!= NULL
; it
= it
->next
) {
42 int tl
, tt
, tr
, tb
; /* 1 past the target's edges on each side */
45 /* don't snap to self or non-visibles */
46 if (!target
->frame
->visible
|| target
== c
) continue;
48 tl
= target
->frame
->area
.x
- 1;
49 tt
= target
->frame
->area
.y
- 1;
50 tr
= tl
+ target
->frame
->area
.width
+ 1;
51 tb
= tt
+ target
->frame
->area
.height
+ 1;
53 /* snapx and snapy ensure that the window snaps to the top-most
54 window edge available, without going all the way from
55 bottom-to-top in the stacking list
57 if (!snapx
&& cl
>= tr
&& l
< tr
&& l
>= tr
- resistance
)
58 *x
= tr
, snapx
= TRUE
;
59 else if (!snapx
&& cr
<= tl
&& r
> tl
&& r
<= tl
+ resistance
)
60 *x
= tl
- w
+ 1, snapx
= TRUE
;
61 else if (!snapy
&& ct
>= tb
&& t
< tb
&& t
>= tb
- resistance
)
62 *y
= tb
, snapy
= TRUE
;
63 else if (!snapy
&& cb
<= tt
&& b
> tt
&& b
<= tt
+ resistance
)
64 *y
= tt
- h
+ 1, snapy
= TRUE
;
66 if (snapx
&& snapy
) break;
69 /* get the screen boundaries */
70 area
= screen_area(c
->desktop
);
73 ar
= al
+ area
->width
- 1;
74 ab
= at
+ area
->height
- 1;
76 /* snap to screen edges */
77 if (cl
>= al
&& l
< al
&& l
>= al
- resistance
)
79 else if (cr
<= ar
&& r
> ar
&& r
<= ar
+ resistance
)
81 if (ct
>= at
&& t
< at
&& t
>= at
- resistance
)
83 else if (cb
<= ab
&& b
> ab
&& b
< ab
+ resistance
)
87 static void event(ObEvent
*e
, void *foo
)
89 g_assert(e
->type
== Event_Client_Moving
);
91 resist(e
->data
.c
.client
, &e
->data
.c
.num
[0], &e
->data
.c
.num
[1]);
96 dispatch_register(Event_Client_Moving
, (EventHandler
)event
, NULL
);
99 void plugin_shutdown()
101 dispatch_register(0, (EventHandler
)event
, NULL
);