openbox/actions/resize.c

   1 #include "openbox/actions.h"
   2 #include "openbox/moveresize.h"
   3 #include "openbox/client.h"
   4 #include "openbox/frame.h"
   5 #include "obt/prop.h"
   6
   7 typedef struct {
   8     gboolean corner_specified;
   9     guint32 corner;
  10 } Options;
  11
  12 static gpointer setup_func(xmlNodePtr node);
  13 static void free_func(gpointer o);
  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", setup_func, free_func, run_func);
  22 }
  23
  24 static gpointer setup_func(xmlNodePtr node)
  25 {
  26     xmlNodePtr n;
  27     Options *o;
  28
  29     o = g_slice_new0(Options);
  30
  31     if ((n = obt_xml_find_node(node, "edge"))) {
  32         gchar *s = obt_xml_node_string(n);
  33
  34         o->corner_specified = TRUE;
  35         if (!g_ascii_strcasecmp(s, "top"))
  36             o->corner = OBT_PROP_ATOM(NET_WM_MOVERESIZE_SIZE_TOP);
  37         else if (!g_ascii_strcasecmp(s, "bottom"))
  38             o->corner = OBT_PROP_ATOM(NET_WM_MOVERESIZE_SIZE_BOTTOM);
  39         else if (!g_ascii_strcasecmp(s, "left"))
  40             o->corner = OBT_PROP_ATOM(NET_WM_MOVERESIZE_SIZE_LEFT);
  41         else if (!g_ascii_strcasecmp(s, "right"))
  42             o->corner = OBT_PROP_ATOM(NET_WM_MOVERESIZE_SIZE_RIGHT);
  43         else if (!g_ascii_strcasecmp(s, "topleft"))
  44             o->corner = OBT_PROP_ATOM(NET_WM_MOVERESIZE_SIZE_TOPLEFT);
  45         else if (!g_ascii_strcasecmp(s, "topright"))
  46             o->corner = OBT_PROP_ATOM(NET_WM_MOVERESIZE_SIZE_TOPRIGHT);
  47         else if (!g_ascii_strcasecmp(s, "bottomleft"))
  48             o->corner = OBT_PROP_ATOM(NET_WM_MOVERESIZE_SIZE_BOTTOMLEFT);
  49         else if (!g_ascii_strcasecmp(s, "bottomright"))
  50             o->corner = OBT_PROP_ATOM(NET_WM_MOVERESIZE_SIZE_BOTTOMRIGHT);
  51         else
  52             o->corner_specified = FALSE;
  53
  54         g_free(s);
  55     }
  56     return o;
  57 }
  58
  59 static void free_func(gpointer o)
  60 {
  61     g_slice_free(Options, o);
  62 }
  63
  64 /* Always return FALSE because its not interactive */
  65 static gboolean run_func(ObActionsData *data, gpointer options)
  66 {
  67     Options *o = options;
  68
  69     if (data->client) {
  70         ObClient *c = data->client;
  71         guint32 corner;
  72
  73         if (!data->button)
  74             corner = OBT_PROP_ATOM(NET_WM_MOVERESIZE_SIZE_KEYBOARD);
  75         else if (o->corner_specified)
  76             corner = o->corner; /* it was specified in the binding */
  77         else
  78             corner = pick_corner(data->x, data->y,
  79                                  c->frame->area.x, c->frame->area.y,
  80                                  /* use the client size because the frame
  81                                     can be differently sized (shaded
  82                                     windows) and we want this based on the
  83                                     clients size */
  84                                  c->area.width + c->frame->size.left +
  85                                  c->frame->size.right,
  86                                  c->area.height + c->frame->size.top +
  87                                  c->frame->size.bottom, c->shaded);
  88
  89         moveresize_start(c, data->x, data->y, data->button, corner);
  90     }
  91
  92     return FALSE;
  93 }
  94
  95 static guint32 pick_corner(gint x, gint y, gint cx, gint cy, gint cw, gint ch,
  96                            gboolean shaded)
  97 {
  98     /* let's make x and y client relative instead of screen relative */
  99     x = x - cx;
 100     y = ch - (y - cy); /* y is inverted, 0 is at the bottom of the window */
 101
 102 #define X x*ch/cw
 103 #define A -4*X + 7*ch/3
 104 #define B  4*X -15*ch/9
 105 #define C -X/4 + 2*ch/3
 106 #define D  X/4 + 5*ch/12
 107 #define E  X/4 +   ch/3
 108 #define F -X/4 + 7*ch/12
 109 #define G  4*X - 4*ch/3
 110 #define H -4*X + 8*ch/3
 111 #define a (y > 5*ch/9)
 112 #define b (x < 4*cw/9)
 113 #define c (x > 5*cw/9)
 114 #define d (y < 4*ch/9)
 115
 116     /*
 117       Each of these defines (except X which is just there for fun), represents
 118       the equation of a line. The lines they represent are shown in the diagram
 119       below. Checking y against these lines, we are able to choose a region
 120       of the window as shown.
 121
 122       +---------------------A-------|-------|-------B---------------------+
 123       |                     |A                     B|                     |
 124       |                     |A      |       |      B|                     |
 125       |                     | A                   B |                     |
 126       |                     | A     |       |     B |                     |
 127       |                     |  A                 B  |                     |
 128       |                     |  A    |       |    B  |                     |
 129       |        northwest    |   A     north     B   |   northeast         |
 130       |                     |   A   |       |   B   |                     |
 131       |                     |    A             B    |                     |
 132       C---------------------+----A--+-------+--B----+---------------------D
 133       |CCCCCCC              |     A           B     |              DDDDDDD|
 134       |       CCCCCCCC      |     A |       | B     |      DDDDDDDD       |
 135       |               CCCCCCC      A         B      DDDDDDD               |
 136       - - - - - - - - - - - +CCCCCCC+aaaaaaa+DDDDDDD+ - - - - - - - - - - - -
 137       |                     |       b       c       |                     | sh
 138       |             west    |       b  move c       |   east              | ad
 139       |                     |       b       c       |                     | ed
 140       - - - - - - - - - - - +EEEEEEE+ddddddd+FFFFFFF+- - - - - - - - - - -  -
 141       |               EEEEEEE      G         H      FFFFFFF               |
 142       |       EEEEEEEE      |     G |       | H     |      FFFFFFFF       |
 143       |EEEEEEE              |     G           H     |              FFFFFFF|
 144       E---------------------+----G--+-------+--H----+---------------------F
 145       |                     |    G             H    |                     |
 146       |                     |   G   |       |   H   |                     |
 147       |        southwest    |   G     south     H   |   southeast         |
 148       |                     |  G    |       |    H  |                     |
 149       |                     |  G                 H  |                     |
 150       |                     | G     |       |     H |                     |
 151       |                     | G                   H |                     |
 152       |                     |G      |       |      H|                     |
 153       |                     |G                     H|                     |
 154       +---------------------G-------|-------|-------H---------------------+
 155     */
 156
 157     if (shaded) {
 158         /* for shaded windows, you can only resize west/east and move */
 159         if (b)
 160             return OBT_PROP_ATOM(NET_WM_MOVERESIZE_SIZE_LEFT);
 161         if (c)
 162             return OBT_PROP_ATOM(NET_WM_MOVERESIZE_SIZE_RIGHT);
 163         return OBT_PROP_ATOM(NET_WM_MOVERESIZE_MOVE);
 164     }
 165
 166     if (y < A && y >= C)
 167         return OBT_PROP_ATOM(NET_WM_MOVERESIZE_SIZE_TOPLEFT);
 168     else if (y >= A && y >= B && a)
 169         return OBT_PROP_ATOM(NET_WM_MOVERESIZE_SIZE_TOP);
 170     else if (y < B && y >= D)
 171         return OBT_PROP_ATOM(NET_WM_MOVERESIZE_SIZE_TOPRIGHT);
 172     else if (y < C && y >= E && b)
 173         return OBT_PROP_ATOM(NET_WM_MOVERESIZE_SIZE_LEFT);
 174     else if (y < D && y >= F && c)
 175         return OBT_PROP_ATOM(NET_WM_MOVERESIZE_SIZE_RIGHT);
 176     else if (y < E && y >= G)
 177         return OBT_PROP_ATOM(NET_WM_MOVERESIZE_SIZE_BOTTOMLEFT);
 178     else if (y < G && y < H && d)
 179         return OBT_PROP_ATOM(NET_WM_MOVERESIZE_SIZE_BOTTOM);
 180     else if (y >= H && y < F)
 181         return OBT_PROP_ATOM(NET_WM_MOVERESIZE_SIZE_BOTTOMRIGHT);
 182     else
 183         return OBT_PROP_ATOM(NET_WM_MOVERESIZE_MOVE);
 184
 185 #undef X
 186 #undef A
 187 #undef B
 188 #undef C
 189 #undef D
 190 #undef E
 191 #undef F
 192 #undef G
 193 #undef H
 194 #undef a
 195 #undef b
 196 #undef c
 197 #undef d
 198 }