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             if (!WINDOW_IS_CLIENT(it->data))
  69                 continue;
  70             target = it->data;
  71             /* don't snap to self or non-visibles */
  72             if (!target->frame->visible || target == c) continue;
  73
  74             tl = target->frame->area.x - 1;
  75             tt = target->frame->area.y - 1;
  76             tr = tl + target->frame->area.width + 1;
  77             tb = tt + target->frame->area.height + 1;
  78
  79             /* snapx and snapy ensure that the window snaps to the top-most
  80                window edge available, without going all the way from
  81                bottom-to-top in the stacking list
  82             */
  83             if (snapx == NULL) {
  84                 if (ct < tb && cb > tt) {
  85                     if (cl >= tr && l < tr && l >= tr - resistance)
  86                         *x = tr, snapx = target;
  87                     else if (cr <= tl && r > tl && r <= tl + resistance)
  88                         *x = tl - w + 1, snapx = target;
  89                     if (snapx != NULL) {
  90                         /* try to corner snap to the window */
  91                         if (ct > tt && t <= tt && t > tt - resistance)
  92                             *y = tt + 1, snapy = target;
  93                         else if (cb < tb && b >= tb && b < tb + resistance)
  94                             *y = tb - h, snapy = target;
  95                     }
  96                 }
  97             }
  98             if (snapy == NULL) {
  99                 if (cl < tr && cr > tl) {
 100                     if (ct >= tb && t < tb && t >= tb - resistance)
 101                         *y = tb, snapy = target;
 102                     else if (cb <= tt && b > tt && b <= tt + resistance)
 103                         *y = tt - h + 1, snapy = target;
 104                     if (snapy != NULL) {
 105                         /* try to corner snap to the window */
 106                         if (cl > tl && l <= tl && l > tl - resistance)
 107                             *x = tl + 1, snapx = target;
 108                         else if (cr < tr && r >= tr && r < tr + resistance)
 109                             *x = tr - w, snapx = target;
 110                     }
 111                 }
 112             }
 113
 114             if (snapx && snapy) break;
 115         }
 116
 117     /* get the screen boundaries */
 118     area = screen_area(c->desktop);
 119     al = area->x;
 120     at = area->y;
 121     ar = al + area->width - 1;
 122     ab = at + area->height - 1;
 123
 124     /* snap to screen edges */
 125     if (cl >= al && l < al && l >= al - resistance)
 126         *x = al;
 127     else if (cr <= ar && r > ar && r <= ar + resistance)
 128             *x = ar - w + 1;
 129     if (ct >= at && t < at && t >= at - resistance)
 130         *y = at;
 131     else if (cb <= ab && b > ab && b < ab + resistance)
 132         *y = ab - h + 1;
 133 }
 134
 135 static void resist_size(Client *c, int *w, int *h, Corner corn)
 136 {
 137     GList *it;
 138     Client *target; /* target */
 139     int l, t, r, b; /* my left, top, right and bottom sides */
 140     int dlt, drb; /* my destination left/top and right/bottom sides */
 141     int tl, tt, tr, tb; /* target's left, top, right and bottom bottom sides */
 142     Rect *area;
 143     int al, at, ar, ab; /* screen boundaries */
 144     Client *snapx = NULL, *snapy = NULL;
 145
 146     /* don't snap windows with size increments */
 147     if (c->size_inc.width > 1 || c->size_inc.height > 1)
 148         return;
 149
 150     l = c->frame->area.x;
 151     r = l + c->frame->area.width - 1;
 152     t = c->frame->area.y;
 153     b = t + c->frame->area.height - 1;
 154
 155     /* get the screen boundaries */
 156     area = screen_area(c->desktop);
 157     al = area->x;
 158     at = area->y;
 159     ar = al + area->width - 1;
 160     ab = at + area->height - 1;
 161
 162     /* snap to other windows */
 163     if (resist_windows) {
 164         for (it = stacking_list; it != NULL; it = it->next) {
 165             if (!WINDOW_IS_CLIENT(it->data))
 166                 continue;
 167             target = it->data;
 168
 169             /* don't snap to invisibles or ourself */
 170             if (!target->frame->visible || target == c) continue;
 171
 172             tl = target->frame->area.x;
 173             tr = target->frame->area.x + target->frame->area.width - 1;
 174             tt = target->frame->area.y;
 175             tb = target->frame->area.y + target->frame->area.height - 1;
 176
 177             if (snapx == NULL) {
 178                 /* horizontal snapping */
 179                 if (t < tb && b > tt) {
 180                     switch (corn) {
 181                     case Corner_TopLeft:
 182                     case Corner_BottomLeft:
 183                         dlt = l;
 184                         drb = r + *w - c->frame->area.width;
 185                         if (r < tl && drb >= tl && drb < tl + resistance)
 186                             *w = tl - l, snapx = target;
 187                         break;
 188                     case Corner_TopRight:
 189                     case Corner_BottomRight:
 190                         dlt = l - *w + c->frame->area.width;
 191                         drb = r;
 192                         if (l > tr && dlt <= tr && dlt > tr - resistance)
 193                             *w = r - tr, snapx = target;
 194                         break;
 195                     }
 196                 }
 197             }
 198
 199             if (snapy == NULL) {
 200                 /* vertical snapping */
 201                 if (l < tr && r > tl) {
 202                     switch (corn) {
 203                     case Corner_TopLeft:
 204                     case Corner_TopRight:
 205                         dlt = t;
 206                         drb = b + *h - c->frame->area.height;
 207                         if (b < tt && drb >= tt && drb < tt + resistance)
 208                             *h = tt - t, snapy = target;
 209                         break;
 210                     case Corner_BottomLeft:
 211                     case Corner_BottomRight:
 212                         dlt = t - *h + c->frame->area.height;
 213                         drb = b;
 214                         if (t > tb && dlt <= tb && dlt > tb - resistance)
 215                             *h = b - tb, snapy = target;
 216                         break;
 217                     }
 218                 }
 219             }
 220
 221             /* snapped both ways */
 222             if (snapx && snapy) break;
 223         }
 224     }
 225
 226     /* snap to screen edges */
 227
 228     /* horizontal snapping */
 229     switch (corn) {
 230     case Corner_TopLeft:
 231     case Corner_BottomLeft:
 232         dlt = l;
 233         drb = r + *w - c->frame->area.width;
 234         if (r <= ar && drb > ar && drb <= ar + resistance)
 235             *w = ar - l + 1;
 236         break;
 237     case Corner_TopRight:
 238     case Corner_BottomRight:
 239         dlt = l - *w + c->frame->area.width;
 240         drb = r;
 241         if (l >= al && dlt < al && dlt >= al - resistance)
 242             *w = r - al + 1;
 243         break;
 244     }
 245
 246     /* vertical snapping */
 247     switch (corn) {
 248     case Corner_TopLeft:
 249     case Corner_TopRight:
 250         dlt = t;
 251         drb = b + *h - c->frame->area.height;
 252         if (b <= ab && drb > ab && drb <= ab + resistance)
 253             *h = ab - t + 1;
 254         break;
 255     case Corner_BottomLeft:
 256     case Corner_BottomRight:
 257         dlt = t - *h + c->frame->area.height;
 258         drb = b;
 259         if (t >= at && dlt < at && dlt >= at - resistance)
 260             *h = b - at + 1;
 261         break;
 262     }
 263 }
 264
 265 static void event(ObEvent *e, void *foo)
 266 {
 267     if (e->type == Event_Client_Moving)
 268         resist_move(e->data.c.client, &e->data.c.num[0], &e->data.c.num[1]);
 269     else if (e->type == Event_Client_Resizing)
 270         resist_size(e->data.c.client, &e->data.c.num[0], &e->data.c.num[1],
 271                     e->data.c.num[2]);
 272 }
 273
 274 void plugin_startup()
 275 {
 276     dispatch_register(Event_Client_Moving | Event_Client_Resizing,
 277                       (EventHandler)event, NULL);
 278 }
 279
 280 void plugin_shutdown()
 281 {
 282     dispatch_register(0, (EventHandler)event, NULL);
 283 }