openbox/actions/resize.c

   1 #include "openbox/actions.h"
   2 #include "openbox/prop.h"
   3 #include "openbox/moveresize.h"
   4 #include "openbox/client.h"
   5 #include "openbox/frame.h"
   6
   7 typedef struct {
   8     gboolean corner_specified;
   9     guint32 corner;
  10 } Options;
  11
  12 static gpointer setup_func(ObParseInst *i, xmlDocPtr doc, xmlNodePtr node);
  13 static void     free_func(gpointer options);
  14 static gboolean run_func(ObActionsData *data, gpointer options);
  15
  16 static guint32 pick_corner(gint x, gint y, gint cx, gint cy, gint cw, gint ch,
  17                            gboolean shaded);
  18
  19 void action_resize_startup(void)
  20 {
  21     actions_register("Resize",
  22                      setup_func,
  23                      free_func,
  24                      run_func,
  25                      NULL, NULL);
  26 }
  27
  28 static gpointer setup_func(ObParseInst *i, xmlDocPtr doc, xmlNodePtr node)
  29 {
  30     xmlNodePtr n;
  31     Options *o;
  32
  33     o = g_new0(Options, 1);
  34
  35     if ((n = parse_find_node("edge", node))) {
  36         gchar *s = parse_string(doc, n);
  37
  38         o->corner_specified = TRUE;
  39         if (!g_ascii_strcasecmp(s, "top"))
  40             o->corner = prop_atoms.net_wm_moveresize_size_top;
  41         else if (!g_ascii_strcasecmp(s, "bottom"))
  42             o->corner = prop_atoms.net_wm_moveresize_size_bottom;
  43         else if (!g_ascii_strcasecmp(s, "left"))
  44             o->corner = prop_atoms.net_wm_moveresize_size_left;
  45         else if (!g_ascii_strcasecmp(s, "right"))
  46             o->corner = prop_atoms.net_wm_moveresize_size_right;
  47         else if (!g_ascii_strcasecmp(s, "topleft"))
  48             o->corner = prop_atoms.net_wm_moveresize_size_topleft;
  49         else if (!g_ascii_strcasecmp(s, "topright"))
  50             o->corner = prop_atoms.net_wm_moveresize_size_topright;
  51         else if (!g_ascii_strcasecmp(s, "bottomleft"))
  52             o->corner = prop_atoms.net_wm_moveresize_size_bottomleft;
  53         else if (!g_ascii_strcasecmp(s, "bottomright"))
  54             o->corner = prop_atoms.net_wm_moveresize_size_bottomright;
  55         else
  56             o->corner_specified = FALSE;
  57
  58         g_free(s);
  59     }
  60     return o;
  61 }
  62
  63 static void free_func(gpointer options)
  64 {
  65     Options *o = options;
  66
  67     g_free(o);
  68 }
  69
  70 /* Always return FALSE because its not interactive */
  71 static gboolean run_func(ObActionsData *data, gpointer options)
  72 {
  73     Options *o = options;
  74
  75     if (data->client) {
  76         ObClient *c = data->client;
  77         guint32 corner;
  78
  79         if (!data->button)
  80             corner = prop_atoms.net_wm_moveresize_size_keyboard;
  81         else if (o->corner_specified)
  82             corner = o->corner; /* it was specified in the binding */
  83         else
  84             corner = pick_corner(data->x, data->y,
  85                                  c->frame->area.x, c->frame->area.y,
  86                                  /* use the client size because the frame
  87                                     can be differently sized (shaded
  88                                     windows) and we want this based on the
  89                                     clients size */
  90                                  c->area.width + c->frame->size.left +
  91                                  c->frame->size.right,
  92                                  c->area.height + c->frame->size.top +
  93                                  c->frame->size.bottom, c->shaded);
  94
  95         moveresize_start(c, data->x, data->y, data->button, corner);
  96     }
  97
  98     return FALSE;
  99 }
 100
 101 static guint32 pick_corner(gint x, gint y, gint cx, gint cy, gint cw, gint ch,
 102                            gboolean shaded)
 103 {
 104     /* let's make x and y client relative instead of screen relative */
 105     x = x - cx;
 106     y = ch - (y - cy); /* y is inverted, 0 is at the bottom of the window */
 107
 108 #define X x*ch/cw
 109 #define A -4*X + 7*ch/3
 110 #define B  4*X -15*ch/9
 111 #define C -X/4 + 2*ch/3
 112 #define D  X/4 + 5*ch/12
 113 #define E  X/4 +   ch/3
 114 #define F -X/4 + 7*ch/12
 115 #define G  4*X - 4*ch/3
 116 #define H -4*X + 8*ch/3
 117 #define a (y > 5*ch/9)
 118 #define b (x < 4*cw/9)
 119 #define c (x > 5*cw/9)
 120 #define d (y < 4*ch/9)
 121
 122     /*
 123       Each of these defines (except X which is just there for fun), represents
 124       the equation of a line. The lines they represent are shown in the diagram
 125       below. Checking y against these lines, we are able to choose a region
 126       of the window as shown.
 127
 128       +---------------------A-------|-------|-------B---------------------+
 129       |                     |A                     B|                     |
 130       |                     |A      |       |      B|                     |
 131       |                     | A                   B |                     |
 132       |                     | A     |       |     B |                     |
 133       |                     |  A                 B  |                     |
 134       |                     |  A    |       |    B  |                     |
 135       |        northwest    |   A     north     B   |   northeast         |
 136       |                     |   A   |       |   B   |                     |
 137       |                     |    A             B    |                     |
 138       C---------------------+----A--+-------+--B----+---------------------D
 139       |CCCCCCC              |     A           B     |              DDDDDDD|
 140       |       CCCCCCCC      |     A |       | B     |      DDDDDDDD       |
 141       |               CCCCCCC      A         B      DDDDDDD               |
 142       - - - - - - - - - - - +CCCCCCC+aaaaaaa+DDDDDDD+ - - - - - - - - - - - -
 143       |                     |       b       c       |                     | sh
 144       |             west    |       b  move c       |   east              | ad
 145       |                     |       b       c       |                     | ed
 146       - - - - - - - - - - - +EEEEEEE+ddddddd+FFFFFFF+- - - - - - - - - - -  -
 147       |               EEEEEEE      G         H      FFFFFFF               |
 148       |       EEEEEEEE      |     G |       | H     |      FFFFFFFF       |
 149       |EEEEEEE              |     G           H     |              FFFFFFF|
 150       E---------------------+----G--+-------+--H----+---------------------F
 151       |                     |    G             H    |                     |
 152       |                     |   G   |       |   H   |                     |
 153       |        southwest    |   G     south     H   |   southeast         |
 154       |                     |  G    |       |    H  |                     |
 155       |                     |  G                 H  |                     |
 156       |                     | G     |       |     H |                     |
 157       |                     | G                   H |                     |
 158       |                     |G      |       |      H|                     |
 159       |                     |G                     H|                     |
 160       +---------------------G-------|-------|-------H---------------------+
 161     */
 162
 163     if (shaded) {
 164         /* for shaded windows, you can only resize west/east and move */
 165         if (b)
 166             return prop_atoms.net_wm_moveresize_size_left;
 167         if (c)
 168             return prop_atoms.net_wm_moveresize_size_right;
 169         return prop_atoms.net_wm_moveresize_move;
 170     }
 171
 172     if (y < A && y >= C)
 173         return prop_atoms.net_wm_moveresize_size_topleft;
 174     else if (y >= A && y >= B && a)
 175         return prop_atoms.net_wm_moveresize_size_top;
 176     else if (y < B && y >= D)
 177         return prop_atoms.net_wm_moveresize_size_topright;
 178     else if (y < C && y >= E && b)
 179         return prop_atoms.net_wm_moveresize_size_left;
 180     else if (y < D && y >= F && c)
 181         return prop_atoms.net_wm_moveresize_size_right;
 182     else if (y < E && y >= G)
 183         return prop_atoms.net_wm_moveresize_size_bottomleft;
 184     else if (y < G && y < H && d)
 185         return prop_atoms.net_wm_moveresize_size_bottom;
 186     else if (y >= H && y < F)
 187         return prop_atoms.net_wm_moveresize_size_bottomright;
 188     else
 189         return prop_atoms.net_wm_moveresize_move;
 190
 191 #undef X
 192 #undef A
 193 #undef B
 194 #undef C
 195 #undef D
 196 #undef E
 197 #undef F
 198 #undef G
 199 #undef H
 200 #undef a
 201 #undef b
 202 #undef c
 203 #undef d
 204 }