+ /* don't snap windows with size increments */
+ if (c->size_inc.width > 1 || c->size_inc.height > 1)
+ return;
+
+ l = c->frame->area.x;
+ r = l + c->frame->area.width - 1;
+ t = c->frame->area.y;
+ b = t + c->frame->area.height - 1;
+
+ /* get the screen boundaries */
+ area = screen_area(c->desktop);
+ al = area->x;
+ at = area->y;
+ ar = al + area->width - 1;
+ ab = at + area->height - 1;
+
+ /* snap to other windows */
+ if (resist_windows) {
+ for (it = stacking_list; it != NULL; it = it->next) {
+ target = it->data;
+
+ /* don't snap to invisibles or ourself */
+ if (!target->frame->visible || target == c) continue;
+
+ tl = target->frame->area.x;
+ tr = target->frame->area.x + target->frame->area.width - 1;
+ tt = target->frame->area.y;
+ tb = target->frame->area.y + target->frame->area.height - 1;
+
+ if (snapx == NULL) {
+ /* horizontal snapping */
+ if (t < tb && b > tt) {
+ switch (corn) {
+ case Corner_TopLeft:
+ case Corner_BottomLeft:
+ dlt = l;
+ drb = r + *w - c->frame->area.width;
+ if (r < tl && drb >= tl && drb < tl + resistance)
+ *w = tl - l, snapx = target;
+ break;
+ case Corner_TopRight:
+ case Corner_BottomRight:
+ dlt = l - *w + c->frame->area.width;
+ drb = r;
+ if (l > tr && dlt <= tr && dlt > tr - resistance)
+ *w = r - tr, snapx = target;
+ break;
+ }
+ }
+ }
+
+ if (snapy == NULL) {
+ /* vertical snapping */
+ if (l < tr && r > tl) {
+ switch (corn) {
+ case Corner_TopLeft:
+ case Corner_TopRight:
+ dlt = t;
+ drb = b + *h - c->frame->area.height;
+ if (b < tt && drb >= tt && drb < tt + resistance)
+ *h = tt - t, snapy = target;
+ break;
+ case Corner_BottomLeft:
+ case Corner_BottomRight:
+ dlt = t - *h + c->frame->area.height;
+ drb = b;
+ if (t > tb && dlt <= tb && dlt > tb - resistance)
+ *h = b - tb, snapy = target;
+ break;
+ }
+ }
+ }
+
+ /* snapped both ways */
+ if (snapx && snapy) break;
+ }
+ }
+
+ /* snap to screen edges */
+
+ /* horizontal snapping */
+ switch (corn) {
+ case Corner_TopLeft:
+ case Corner_BottomLeft:
+ dlt = l;
+ drb = r + *w - c->frame->area.width;
+ if (r <= ar && drb > ar && drb <= ar + resistance)
+ *w = ar - l + 1;
+ break;
+ case Corner_TopRight:
+ case Corner_BottomRight:
+ dlt = l - *w + c->frame->area.width;
+ drb = r;
+ if (l >= al && dlt < al && dlt >= al - resistance)
+ *w = r - al + 1;
+ break;
+ }
+
+ /* vertical snapping */
+ switch (corn) {
+ case Corner_TopLeft:
+ case Corner_TopRight:
+ dlt = t;
+ drb = b + *h - c->frame->area.height;
+ if (b <= ab && drb > ab && drb <= ab + resistance)
+ *h = ab - t + 1;
+ break;
+ case Corner_BottomLeft:
+ case Corner_BottomRight:
+ dlt = t - *h + c->frame->area.height;
+ drb = b;
+ if (t >= at && dlt < at && dlt >= at - resistance)
+ *h = b - at + 1;
+ break;
+ }
+}
+
+static void event(ObEvent *e, void *foo)
+{
+ if (e->type == Event_Client_Moving)
+ resist_move(e->data.c.client, &e->data.c.num[0], &e->data.c.num[1]);
+ else if (e->type == Event_Client_Resizing)
+ resist_size(e->data.c.client, &e->data.c.num[0], &e->data.c.num[1],
+ e->data.c.num[2]);