Dogcows Code - chaz/openbox/blob - plugins/resistance.c

   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"
   6 #include <glib.h>
   7
   8 void plugin_setup_config()
   9 {
  10 }
  11
  12 static int resistance = 10;
  13 static gboolean window_resistance = TRUE; /* window-to-window */
  14
  15 static void resist(Client *c, int *x, int *y)
  16 {
  17     GList *it;
  18     Rect *area;
  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;
  24
  25     w = c->frame->area.width;
  26     h = c->frame->area.height;
  27
  28     l = *x;
  29     t = *y;
  30     r = l + w - 1;
  31     b = t + h - 1;
  32
  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;
  37
  38     /* snap to other clients */
  39     if (window_resistance)
  40         for (it = stacking_list; it != NULL; it = it->next) {
  41             Client *target;
  42             int tl, tt, tr, tb; /* 1 past the target's edges on each side */
  43
  44             target = it->data;
  45             /* don't snap to self or non-visibles */
  46             if (!target->frame->visible || target == c) continue;
  47
  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;
  52
  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
  56             */
  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;
  65
  66             if (snapx && snapy) break;
  67         }
  68
  69     /* get the screen boundaries */
  70     area = screen_area(c->desktop);
  71     al = area->x;
  72     at = area->y;
  73     ar = al + area->width - 1;
  74     ab = at + area->height - 1;
  75
  76     /* snap to screen edges */
  77     if (cl >= al && l < al && l >= al - resistance)
  78         *x = al;
  79     else if (cr <= ar && r > ar && r <= ar + resistance)
  80             *x = ar - w + 1;
  81     if (ct >= at && t < at && t >= at - resistance)
  82         *y = at;
  83     else if (cb <= ab && b > ab && b < ab + resistance)
  84         *y = ab - h + 1;
  85 }
  86
  87 static void event(ObEvent *e, void *foo)
  88 {
  89     g_assert(e->type == Event_Client_Moving);
  90
  91     resist(e->data.c.client, &e->data.c.num[0], &e->data.c.num[1]);
  92 }
  93
  94 void plugin_startup()
  95 {
  96     dispatch_register(Event_Client_Moving, (EventHandler)event, NULL);
  97 }
  98
  99 void plugin_shutdown()
 100 {
 101     dispatch_register(0, (EventHandler)event, NULL);
 102 }