libs/gravity.h

   1 /* -*-c-*- */
   2
   3 #ifndef GRAVITY_H
   4 #define GRAVITY_H
   5
   6 /* ---------------------------- included header files ---------------------- */
   7
   8 /* ---------------------------- global definitions ------------------------- */
   9
  10 /* ---------------------------- global macros ------------------------------ */
  11
  12 /* ---------------------------- type definitions --------------------------- */
  13
  14 typedef enum
  15 {
  16         DIR_NONE = -1,
  17         DIR_N = 0,
  18         DIR_E = 1,
  19         DIR_S = 2,
  20         DIR_W = 3,
  21         DIR_MAJOR_MASK = 3,
  22         DIR_NE = 4,
  23         DIR_SE = 5,
  24         DIR_SW = 6,
  25         DIR_NW = 7,
  26         DIR_MINOR_MASK = 7,
  27         DIR_MASK = 7,
  28         DIR_C = 8,
  29         DIR_ALL_MASK = 8
  30 } direction_t;
  31
  32 typedef enum
  33 {
  34         MULTI_DIR_NONE = 0,
  35         MULTI_DIR_FIRST = (1 << DIR_N),
  36         MULTI_DIR_N =     (1 << DIR_N),
  37         MULTI_DIR_E =     (1 << DIR_E),
  38         MULTI_DIR_S =     (1 << DIR_S),
  39         MULTI_DIR_W =     (1 << DIR_W),
  40         MULTI_DIR_NE =    (1 << DIR_NE),
  41         MULTI_DIR_SE =    (1 << DIR_SE),
  42         MULTI_DIR_SW =    (1 << DIR_SW),
  43         MULTI_DIR_NW =    (1 << DIR_NW),
  44         MULTI_DIR_ALL =  ((1 << (DIR_MASK + 1)) - 1),
  45         MULTI_DIR_C =     (1 << DIR_C),
  46         MULTI_DIR_LAST =  (1 << DIR_ALL_MASK)
  47 } multi_direction_t;
  48
  49 typedef enum
  50 {
  51         ROTATION_0    = 0,
  52         ROTATION_90   = 1,
  53         ROTATION_180  = 2,
  54         ROTATION_270  = 3,
  55         ROTATION_MASK = 3
  56 } rotation_t;
  57
  58 /* ---------------------------- exported variables (globals) --------------- */
  59
  60 /* ---------------------------- interface functions ------------------------ */
  61
  62 void gravity_get_offsets(int grav, int *xp,int *yp);
  63 void gravity_move(int gravity, rectangle *rect, int xdiff, int ydiff);
  64 void gravity_resize(int gravity, rectangle *rect, int wdiff, int hdiff);
  65 void gravity_move_resize_parent_child(
  66         int child_gravity, rectangle *parent_diff_r, rectangle *child_r);
  67 direction_t gravity_grav_to_dir(
  68         int grav);
  69 int gravity_dir_to_grav(
  70         direction_t dir);
  71 int gravity_combine_xy_grav(
  72         int grav_x, int grav_y);
  73 void gravity_split_xy_grav(
  74         int *ret_grav_x, int *ret_grav_y, int in_grav);
  75 int gravity_combine_xy_dir(
  76         int dir_x, int dir_y);
  77 void gravity_split_xy_dir(
  78         int *ret_dir_x, int *ret_dir_y, int in_dir);
  79 int gravity_dir_to_sign_one_axis(
  80         direction_t dir);
  81 direction_t gravity_parse_dir_argument(
  82         char *action, char **ret_action, direction_t default_ret);
  83 char *gravity_dir_to_string(direction_t dir, char *default_str);
  84 multi_direction_t gravity_parse_multi_dir_argument(
  85         char *action, char **ret_action);
  86 void gravity_get_next_multi_dir(int dir_set, multi_direction_t *dir);
  87 direction_t gravity_multi_dir_to_dir(multi_direction_t mdir);
  88 void gravity_rotate_xy(rotation_t rot, int x, int y, int *ret_x, int *ret_y);
  89 rotation_t gravity_add_rotations(rotation_t rot1, rotation_t rot2);
  90
  91 #endif /* GRAVITY_H */