Dogcows Code - chaz/openbox/blob - plugins/resistance/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 "parser/parse.h"
   7 #include "resistance.h"
   8 #include <glib.h>
   9
  10 static int resistance;
  11 static gboolean resist_windows;
  12
  13 static void parse_xml(xmlDocPtr doc, xmlNodePtr node, void *d)
  14 {
  15     xmlNodePtr n;
  16
  17     if ((n = parse_find_node("strength", node)))
  18         resistance = parse_int(doc, n);
  19     if ((n = parse_find_node("windows", node)))
  20         resist_windows = parse_bool(doc, n);
  21 }
  22
  23 void plugin_setup_config()
  24 {
  25     resistance = DEFAULT_RESISTANCE;
  26     resist_windows = DEFAULT_RESIST_WINDOWS;
  27
  28     parse_register("resistance", parse_xml, NULL);
  29 }
  30
  31 static void resist_move(Client *c, int *x, int *y)
  32 {
  33     GList *it;
  34     Rect *area;
  35     guint i;
  36     int l, t, r, b; /* requested edges */
  37     int al, at, ar, ab; /* screen area edges */
  38     int cl, ct, cr, cb; /* current edges */
  39     int w, h; /* current size */
  40     Client *snapx = NULL, *snapy = NULL;
  41
  42     w = c->frame->area.width;
  43     h = c->frame->area.height;
  44
  45     l = *x;
  46     t = *y;
  47     r = l + w - 1;
  48     b = t + h - 1;
  49
  50     cl = c->frame->area.x;
  51     ct = c->frame->area.y;
  52     cr = cl + c->frame->area.width - 1;
  53     cb = ct + c->frame->area.height - 1;
  54
  55     /* snap to other clients */
  56     if (resist_windows)
  57         for (it = stacking_list; it != NULL; it = it->next) {
  58             Client *target;
  59             int tl, tt, tr, tb; /* 1 past the target's edges on each side */
  60
  61             if (!WINDOW_IS_CLIENT(it->data))
  62                 continue;
  63             target = it->data;
  64             /* don't snap to self or non-visibles */
  65             if (!target->frame->visible || target == c) continue;
  66
  67             tl = target->frame->area.x - 1;
  68             tt = target->frame->area.y - 1;
  69             tr = tl + target->frame->area.width + 1;
  70             tb = tt + target->frame->area.height + 1;
  71
  72             /* snapx and snapy ensure that the window snaps to the top-most
  73                window edge available, without going all the way from
  74                bottom-to-top in the stacking list
  75             */
  76             if (snapx == NULL) {
  77                 if (ct < tb && cb > tt) {
  78                     if (cl >= tr && l < tr && l >= tr - resistance)
  79                         *x = tr, snapx = target;
  80                     else if (cr <= tl && r > tl && r <= tl + resistance)
  81                         *x = tl - w + 1, snapx = target;
  82                     if (snapx != NULL) {
  83                         /* try to corner snap to the window */
  84                         if (ct > tt && t <= tt && t > tt - resistance)
  85                             *y = tt + 1, snapy = target;
  86                         else if (cb < tb && b >= tb && b < tb + resistance)
  87                             *y = tb - h, snapy = target;
  88                     }
  89                 }
  90             }
  91             if (snapy == NULL) {
  92                 if (cl < tr && cr > tl) {
  93                     if (ct >= tb && t < tb && t >= tb - resistance)
  94                         *y = tb, snapy = target;
  95                     else if (cb <= tt && b > tt && b <= tt + resistance)
  96                         *y = tt - h + 1, snapy = target;
  97                     if (snapy != NULL) {
  98                         /* try to corner snap to the window */
  99                         if (cl > tl && l <= tl && l > tl - resistance)
 100                             *x = tl + 1, snapx = target;
 101                         else if (cr < tr && r >= tr && r < tr + resistance)
 102                             *x = tr - w, snapx = target;
 103                     }
 104                 }
 105             }
 106
 107             if (snapx && snapy) break;
 108         }
 109
 110     /* get the screen boundaries */
 111     area = screen_area_xinerama(c->desktop, client_xinerama_area(c));
 112
 113     al = area->x;
 114     at = area->y;
 115     ar = al + area->width - 1;
 116     ab = at + area->height - 1;
 117
 118     /* snap to screen edges */
 119     if (cl >= al && l < al && l >= al - resistance)
 120         *x = al;
 121     else if (cr <= ar && r > ar && r <= ar + resistance)
 122         *x = ar - w + 1;
 123     if (ct >= at && t < at && t >= at - resistance)
 124         *y = at;
 125     else if (cb <= ab && b > ab && b < ab + resistance)
 126         *y = ab - h + 1;
 127 }
 128
 129 static void resist_size(Client *c, int *w, int *h, Corner corn)
 130 {
 131     GList *it;
 132     Client *target; /* target */
 133     int l, t, r, b; /* my left, top, right and bottom sides */
 134     int dlt, drb; /* my destination left/top and right/bottom sides */
 135     int tl, tt, tr, tb; /* target's left, top, right and bottom bottom sides */
 136     Rect *area;
 137     int al, at, ar, ab; /* screen boundaries */
 138     Client *snapx = NULL, *snapy = NULL;
 139
 140     /* don't snap windows with size increments */
 141     if (c->size_inc.width > 1 || c->size_inc.height > 1)
 142         return;
 143
 144     l = c->frame->area.x;
 145     r = l + c->frame->area.width - 1;
 146     t = c->frame->area.y;
 147     b = t + c->frame->area.height - 1;
 148
 149     /* get the screen boundaries */
 150     area = screen_area(c->desktop);
 151     al = area->x;
 152     at = area->y;
 153     ar = al + area->width - 1;
 154     ab = at + area->height - 1;
 155
 156     /* snap to other windows */
 157     if (resist_windows) {
 158         for (it = stacking_list; it != NULL; it = it->next) {
 159             if (!WINDOW_IS_CLIENT(it->data))
 160                 continue;
 161             target = it->data;
 162
 163             /* don't snap to invisibles or ourself */
 164             if (!target->frame->visible || target == c) continue;
 165
 166             tl = target->frame->area.x;
 167             tr = target->frame->area.x + target->frame->area.width - 1;
 168             tt = target->frame->area.y;
 169             tb = target->frame->area.y + target->frame->area.height - 1;
 170
 171             if (snapx == NULL) {
 172                 /* horizontal snapping */
 173                 if (t < tb && b > tt) {
 174                     switch (corn) {
 175                     case Corner_TopLeft:
 176                     case Corner_BottomLeft:
 177                         dlt = l;
 178                         drb = r + *w - c->frame->area.width;
 179                         if (r < tl && drb >= tl && drb < tl + resistance)
 180                             *w = tl - l, snapx = target;
 181                         break;
 182                     case Corner_TopRight:
 183                     case Corner_BottomRight:
 184                         dlt = l - *w + c->frame->area.width;
 185                         drb = r;
 186                         if (l > tr && dlt <= tr && dlt > tr - resistance)
 187                             *w = r - tr, snapx = target;
 188                         break;
 189                     }
 190                 }
 191             }
 192
 193             if (snapy == NULL) {
 194                 /* vertical snapping */
 195                 if (l < tr && r > tl) {
 196                     switch (corn) {
 197                     case Corner_TopLeft:
 198                     case Corner_TopRight:
 199                         dlt = t;
 200                         drb = b + *h - c->frame->area.height;
 201                         if (b < tt && drb >= tt && drb < tt + resistance)
 202                             *h = tt - t, snapy = target;
 203                         break;
 204                     case Corner_BottomLeft:
 205                     case Corner_BottomRight:
 206                         dlt = t - *h + c->frame->area.height;
 207                         drb = b;
 208                         if (t > tb && dlt <= tb && dlt > tb - resistance)
 209                             *h = b - tb, snapy = target;
 210                         break;
 211                     }
 212                 }
 213             }
 214
 215             /* snapped both ways */
 216             if (snapx && snapy) break;
 217         }
 218     }
 219
 220     /* snap to screen edges */
 221
 222     /* horizontal snapping */
 223     switch (corn) {
 224     case Corner_TopLeft:
 225     case Corner_BottomLeft:
 226         dlt = l;
 227         drb = r + *w - c->frame->area.width;
 228         if (r <= ar && drb > ar && drb <= ar + resistance)
 229             *w = ar - l + 1;
 230         break;
 231     case Corner_TopRight:
 232     case Corner_BottomRight:
 233         dlt = l - *w + c->frame->area.width;
 234         drb = r;
 235         if (l >= al && dlt < al && dlt >= al - resistance)
 236             *w = r - al + 1;
 237         break;
 238     }
 239
 240     /* vertical snapping */
 241     switch (corn) {
 242     case Corner_TopLeft:
 243     case Corner_TopRight:
 244         dlt = t;
 245         drb = b + *h - c->frame->area.height;
 246         if (b <= ab && drb > ab && drb <= ab + resistance)
 247             *h = ab - t + 1;
 248         break;
 249     case Corner_BottomLeft:
 250     case Corner_BottomRight:
 251         dlt = t - *h + c->frame->area.height;
 252         drb = b;
 253         if (t >= at && dlt < at && dlt >= at - resistance)
 254             *h = b - at + 1;
 255         break;
 256     }
 257 }
 258
 259 static void event(ObEvent *e, void *foo)
 260 {
 261     if (e->type == Event_Client_Moving)
 262         resist_move(e->data.c.client, &e->data.c.num[0], &e->data.c.num[1]);
 263     else if (e->type == Event_Client_Resizing)
 264         resist_size(e->data.c.client, &e->data.c.num[0], &e->data.c.num[1],
 265                     e->data.c.num[2]);
 266 }
 267
 268 void plugin_startup()
 269 {
 270     dispatch_register(Event_Client_Moving | Event_Client_Resizing,
 271                       (EventHandler)event, NULL);
 272 }
 273
 274 void plugin_shutdown()
 275 {
 276     dispatch_register(0, (EventHandler)event, NULL);
 277 }