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