143 lines
4.8 KiB
C
143 lines
4.8 KiB
C
#include "../kernel/dispatch.h"
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#include "../kernel/client.h"
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#include "../kernel/frame.h"
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#include "../kernel/stacking.h"
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#include "../kernel/screen.h"
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#include "../kernel/config.h"
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#include <glib.h>
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#define DEFAULT_RESISTANCE 10
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void plugin_setup_config()
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{
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ConfigValue val;
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config_def_set(config_def_new("resistance", Config_Integer,
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"Edge Resistance",
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"The amount of resistance to provide when "
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"moving windows past edges."
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"positioned."));
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config_def_set(config_def_new("resistance.windows", Config_Bool,
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"Edge Resistance On Windows",
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"Whether to provide edge resistance when "
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"moving windows past the edge of another "
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"window."));
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val.bool = TRUE;
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config_set("resistance.windows", Config_Bool, val);
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}
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static void resist(Client *c, int *x, int *y)
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{
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GList *it;
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Rect *area;
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int l, t, r, b; /* requested edges */
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int al, at, ar, ab; /* screen area edges */
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int cl, ct, cr, cb; /* current edges */
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int w, h; /* current size */
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Client *snapx = NULL, *snapy = NULL;
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ConfigValue resist, window_resist;
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if (!config_get("resistance", Config_Integer, &resist) ||
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resist.integer < 0) {
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resist.integer = DEFAULT_RESISTANCE;
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config_set("resistance", Config_Integer, resist);
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}
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if (!config_get("resistance.windows", Config_Bool, &window_resist))
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g_assert_not_reached();
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w = c->frame->area.width;
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h = c->frame->area.height;
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l = *x;
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t = *y;
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r = l + w - 1;
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b = t + h - 1;
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cl = c->frame->area.x;
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ct = c->frame->area.y;
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cr = cl + c->frame->area.width - 1;
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cb = ct + c->frame->area.height - 1;
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/* snap to other clients */
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if (window_resist.bool)
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for (it = stacking_list; it != NULL; it = it->next) {
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Client *target;
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int tl, tt, tr, tb; /* 1 past the target's edges on each side */
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target = it->data;
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/* don't snap to self or non-visibles */
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if (!target->frame->visible || target == c) continue;
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tl = target->frame->area.x - 1;
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tt = target->frame->area.y - 1;
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tr = tl + target->frame->area.width + 1;
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tb = tt + target->frame->area.height + 1;
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/* snapx and snapy ensure that the window snaps to the top-most
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window edge available, without going all the way from
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bottom-to-top in the stacking list
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*/
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if (snapx == NULL) {
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if (cl >= tr && l < tr && l >= tr - resist.integer)
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*x = tr, snapx = target;
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else if (cr <= tl && r > tl && r <= tl + resist.integer)
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*x = tl - w + 1, snapx = target;
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if (snapx != NULL) {
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/* try to corner snap to the window */
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if (ct > tt && t <= tt && t > tt - resist.integer)
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*y = tt + 1, snapy = target;
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else if (cb < tb && b >= tb && b < tb + resist.integer)
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*y = tb - h, snapy = target;
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}
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}
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if (snapy == NULL) {
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if (ct >= tb && t < tb && t >= tb - resist.integer)
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*y = tb, snapy = target;
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else if (!cb <= tt && b > tt && b <= tt + resist.integer)
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*y = tt - h + 1, snapy = target;
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if (snapy != NULL) {
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/* try to corner snap to the window */
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if (cl > tl && l <= tl && l > tl - resist.integer)
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*x = tl + 1, snapx = target;
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else if (cr < tr && r >= tr && r < tr + resist.integer)
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*x = tr - w, snapx = target;
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}
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}
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if (snapx && snapy) break;
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}
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/* get the screen boundaries */
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area = screen_area(c->desktop);
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al = area->x;
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at = area->y;
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ar = al + area->width - 1;
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ab = at + area->height - 1;
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/* snap to screen edges */
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if (cl >= al && l < al && l >= al - resist.integer)
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*x = al;
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else if (cr <= ar && r > ar && r <= ar + resist.integer)
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*x = ar - w + 1;
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if (ct >= at && t < at && t >= at - resist.integer)
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*y = at;
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else if (cb <= ab && b > ab && b < ab + resist.integer)
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*y = ab - h + 1;
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}
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static void event(ObEvent *e, void *foo)
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{
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g_assert(e->type == Event_Client_Moving);
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resist(e->data.c.client, &e->data.c.num[0], &e->data.c.num[1]);
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}
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void plugin_startup()
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{
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dispatch_register(Event_Client_Moving, (EventHandler)event, NULL);
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}
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void plugin_shutdown()
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{
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dispatch_register(0, (EventHandler)event, NULL);
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}
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