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/parse.h"
   5 #include "kernel/stacking.h"
   6 #include "kernel/screen.h"
   7 #include <glib.h>
   8
   9 static int resistance;
  10 static gboolean resist_windows;
  11
  12 static void parse_assign(char *name, ParseToken *value)
  13 {
  14     if (!g_ascii_strcasecmp(name, "strength")) {
  15         if (value->type != TOKEN_INTEGER)
  16             yyerror("invalid value");
  17         else {
  18             if (value->data.integer >= 0)
  19                 resistance = value->data.integer;
  20         }
  21     } else if  (!g_ascii_strcasecmp(name, "windows")) {
  22         if (value->type != TOKEN_BOOL)
  23             yyerror("invalid value");
  24         else
  25             resist_windows = value->data.bool;
  26     } else
  27         yyerror("invalid option");
  28     parse_free_token(value);
  29 }
  30
  31 void plugin_setup_config()
  32 {
  33     resistance = 10;
  34     resist_windows = TRUE;
  35
  36     parse_reg_section("resistance", NULL, parse_assign);
  37 }
  38
  39 static void resist_move(Client *c, int *x, int *y)
  40 {
  41     GList *it;
  42     Rect *area;
  43     int l, t, r, b; /* requested edges */
  44     int al, at, ar, ab; /* screen area edges */
  45     int cl, ct, cr, cb; /* current edges */
  46     int w, h; /* current size */
  47     Client *snapx = NULL, *snapy = NULL;
  48
  49     w = c->frame->area.width;
  50     h = c->frame->area.height;
  51
  52     l = *x;
  53     t = *y;
  54     r = l + w - 1;
  55     b = t + h - 1;
  56
  57     cl = c->frame->area.x;
  58     ct = c->frame->area.y;
  59     cr = cl + c->frame->area.width - 1;
  60     cb = ct + c->frame->area.height - 1;
  61
  62     /* snap to other clients */
  63     if (resist_windows)
  64         for (it = stacking_list; it != NULL; it = it->next) {
  65             Client *target;
  66             int tl, tt, tr, tb; /* 1 past the target's edges on each side */
  67
  68             target = it->data;
  69             /* don't snap to self or non-visibles */
  70             if (!target->frame->visible || target == c) continue;
  71
  72             tl = target->frame->area.x - 1;
  73             tt = target->frame->area.y - 1;
  74             tr = tl + target->frame->area.width + 1;
  75             tb = tt + target->frame->area.height + 1;
  76
  77             /* snapx and snapy ensure that the window snaps to the top-most
  78                window edge available, without going all the way from
  79                bottom-to-top in the stacking list
  80             */
  81             if (snapx == NULL) {
  82                 if (ct < tb && cb > tt) {
  83                     if (cl >= tr && l < tr && l >= tr - resistance)
  84                         *x = tr, snapx = target;
  85                     else if (cr <= tl && r > tl && r <= tl + resistance)
  86                         *x = tl - w + 1, snapx = target;
  87                     if (snapx != NULL) {
  88                         /* try to corner snap to the window */
  89                         if (ct > tt && t <= tt && t > tt - resistance)
  90                             *y = tt + 1, snapy = target;
  91                         else if (cb < tb && b >= tb && b < tb + resistance)
  92                             *y = tb - h, snapy = target;
  93                     }
  94                 }
  95             }
  96             if (snapy == NULL) {
  97                 if (cl < tr && cr > tl) {
  98                     if (ct >= tb && t < tb && t >= tb - resistance)
  99                         *y = tb, snapy = target;
 100                     else if (cb <= tt && b > tt && b <= tt + resistance)
 101                         *y = tt - h + 1, snapy = target;
 102                     if (snapy != NULL) {
 103                         /* try to corner snap to the window */
 104                         if (cl > tl && l <= tl && l > tl - resistance)
 105                             *x = tl + 1, snapx = target;
 106                         else if (cr < tr && r >= tr && r < tr + resistance)
 107                             *x = tr - w, snapx = target;
 108                     }
 109                 }
 110             }
 111
 112             if (snapx && snapy) break;
 113         }
 114
 115     /* get the screen boundaries */
 116     area = screen_area(c->desktop);
 117     al = area->x;
 118     at = area->y;
 119     ar = al + area->width - 1;
 120     ab = at + area->height - 1;
 121
 122     /* snap to screen edges */
 123     if (cl >= al && l < al && l >= al - resistance)
 124         *x = al;
 125     else if (cr <= ar && r > ar && r <= ar + resistance)
 126             *x = ar - w + 1;
 127     if (ct >= at && t < at && t >= at - resistance)
 128         *y = at;
 129     else if (cb <= ab && b > ab && b < ab + resistance)
 130         *y = ab - h + 1;
 131 }
 132
 133 static void resist_size(Client *c, int *w, int *h, Corner corn)
 134 {
 135     GList *it;
 136     Client *target; /* target */
 137     int l, t, r, b; /* my left, top, right and bottom sides */
 138     int dlt, drb; /* my destination left/top and right/bottom sides */
 139     int tl, tt, tr, tb; /* target's left, top, right and bottom bottom sides */
 140     Rect *area;
 141     int al, at, ar, ab; /* screen boundaries */
 142     Client *snapx = NULL, *snapy = NULL;
 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             target = it->data;
 160
 161             /* don't snap to invisibles or ourself */
 162             if (!target->frame->visible || target == c) continue;
 163
 164             tl = target->frame->area.x;
 165             tr = target->frame->area.x + target->frame->area.width - 1;
 166             tt = target->frame->area.y;
 167             tb = target->frame->area.y + target->frame->area.height - 1;
 168
 169             if (snapx == NULL) {
 170                 /* horizontal snapping */
 171                 if (t < tb && b > tt) {
 172                     switch (corn) {
 173                     case Corner_TopLeft:
 174                     case Corner_BottomLeft:
 175                         dlt = l;
 176                         drb = r + *w - c->frame->area.width;
 177                         if (r < tl && drb >= tl && drb < tl + resistance)
 178                             *w = tl - l, snapx = target;
 179                         break;
 180                     case Corner_TopRight:
 181                     case Corner_BottomRight:
 182                         dlt = l - *w + c->frame->area.width;
 183                         drb = r;
 184                         if (l > tr && dlt <= tr && dlt > tr - resistance)
 185                             *w = r - tr, snapx = target;
 186                         break;
 187                     }
 188                 }
 189             }
 190
 191             if (snapy == NULL) {
 192                 /* vertical snapping */
 193                 if (l < tr && r > tl) {
 194                     switch (corn) {
 195                     case Corner_TopLeft:
 196                     case Corner_TopRight:
 197                         dlt = t;
 198                         drb = b + *h - c->frame->area.height;
 199                         if (b < tt && drb >= tt && drb < tt + resistance)
 200                             *h = tt - t, snapy = target;
 201                         break;
 202                     case Corner_BottomLeft:
 203                     case Corner_BottomRight:
 204                         dlt = t - *h + c->frame->area.height;
 205                         drb = b;
 206                         if (t > tb && dlt <= tb && dlt > tb - resistance)
 207                             *h = b - tb, snapy = target;
 208                         break;
 209                     }
 210                 }
 211             }
 212
 213             /* snapped both ways */
 214             if (snapx && snapy) break;
 215         }
 216     }
 217
 218     /* snap to screen edges */
 219
 220     /* horizontal snapping */
 221     switch (corn) {
 222     case Corner_TopLeft:
 223     case Corner_BottomLeft:
 224         dlt = l;
 225         drb = r + *w - c->frame->area.width;
 226         if (r <= ar && drb > ar && drb <= ar + resistance)
 227             *w = ar - l + 1;
 228         break;
 229     case Corner_TopRight:
 230     case Corner_BottomRight:
 231         dlt = l - *w + c->frame->area.width;
 232         drb = r;
 233         if (l >= al && dlt < al && dlt >= al - resistance)
 234             *w = r - al + 1;
 235         break;
 236     }
 237
 238     /* vertical snapping */
 239     switch (corn) {
 240     case Corner_TopLeft:
 241     case Corner_TopRight:
 242         dlt = t;
 243         drb = b + *h - c->frame->area.height;
 244         if (b <= ab && drb > ab && drb <= ab + resistance)
 245             *h = ab - t + 1;
 246         break;
 247     case Corner_BottomLeft:
 248     case Corner_BottomRight:
 249         dlt = t - *h + c->frame->area.height;
 250         drb = b;
 251         if (t >= at && dlt < at && dlt >= at - resistance)
 252             *h = b - at + 1;
 253         break;
 254     }
 255
 256     /* round down for size increments */
 257     *w -= c->frame->area.width + c->frame->size.left + c->frame->size.right;
 258     *w = *w / c->size_inc.width * c->size_inc.width;
 259     *w += c->frame->area.width + c->frame->size.left + c->frame->size.right;
 260
 261     *h -= c->frame->area.height + c->frame->size.top + c->frame->size.bottom;
 262     *h = *h / c->size_inc.height * c->size_inc.height;
 263     *h += c->frame->area.height + c->frame->size.top + c->frame->size.bottom;
 264 }
 265
 266 static void event(ObEvent *e, void *foo)
 267 {
 268     if (e->type == Event_Client_Moving)
 269         resist_move(e->data.c.client, &e->data.c.num[0], &e->data.c.num[1]);
 270     else if (e->type == Event_Client_Resizing)
 271         resist_size(e->data.c.client, &e->data.c.num[0], &e->data.c.num[1],
 272                     e->data.c.num[2]);
 273 }
 274
 275 void plugin_startup()
 276 {
 277     dispatch_register(Event_Client_Moving | Event_Client_Resizing,
 278                       (EventHandler)event, NULL);
 279 }
 280
 281 void plugin_shutdown()
 282 {
 283     dispatch_register(0, (EventHandler)event, NULL);
 284 }