eleni.mutantstargoat.com Git - winnie/blob - src/fbdev/mouse.cc

   1 #ifdef WINNIE_FBDEV
   2 #include <errno.h>
   3 #include <limits.h>
   4 #include <stdio.h>
   5 #include <stdlib.h>
   6 #include <string.h>
   7
   8 #include <fcntl.h>
   9 #include <sys/ioctl.h>
  10 #include <termios.h>
  11 #include <unistd.h>
  12
  13 #include "geom.h"
  14 #include "gfx.h"
  15 #include "mouse.h"
  16 #include "window.h"
  17 #include "wm.h"
  18
  19 #define BN_LEFT         1
  20 #define BN_RIGHT        2
  21 #define BN_MIDDLE       4
  22
  23 static int read_mouse();
  24
  25 struct Mouse {
  26         int dev_fd;
  27         Rect bounds;
  28         int pointer_x;
  29         int pointer_y;
  30         int bnstate;
  31 };
  32
  33 static Mouse *mouse;
  34
  35 bool init_mouse()
  36 {
  37         if(!(mouse = (Mouse*)malloc(sizeof *mouse))) {
  38                 return false;
  39         }
  40
  41         mouse->dev_fd = -1;
  42
  43         if((mouse->dev_fd = open("/dev/psaux", O_RDONLY | O_NONBLOCK)) == -1) {
  44                 fprintf(stderr, "Cannot open /dev/psaux : %s\n", strerror(errno));
  45                 return false;
  46         }
  47
  48         set_mouse_bounds(get_screen_size());
  49         return true;
  50 }
  51
  52 void destroy_mouse()
  53 {
  54         if(mouse->dev_fd != -1) {
  55                 close(mouse->dev_fd);
  56                 mouse->dev_fd = -1;
  57         }
  58         free(mouse);
  59 }
  60
  61 void set_mouse_bounds(const Rect &rect)
  62 {
  63         mouse->bounds = rect;
  64 }
  65
  66 int get_mouse_fd()
  67 {
  68         return mouse->dev_fd;
  69 }
  70
  71 void process_mouse_event()
  72 {
  73         /* TODO:
  74          * - read all pending events from mouse fd (use O_NONBLOCK so that
  75          *   read will return -1 when there are no more events instead of blocking).
  76          */
  77
  78         int prev_state = mouse->bnstate;
  79         int prev_x = mouse->pointer_x;
  80         int prev_y = mouse->pointer_y;
  81
  82         if(read_mouse() == -1) {
  83                 return;
  84         }
  85
  86         Window *top;
  87         if(!(top = wm->get_grab_window())) {
  88                 top = wm->get_window_at_pos(mouse->pointer_x, mouse->pointer_y);
  89                 if(top) {
  90                         wm->set_focused_window(top);
  91                 }
  92                 else {
  93                         wm->set_focused_window(0);
  94                 }
  95         }
  96
  97          /* - send each pointer move and button press/release to the topmost window
  98          *   with the pointer on it.
  99          */
 100
 101         int dx = mouse->pointer_x - prev_x;
 102         int dy = mouse->pointer_y - prev_y;
 103
 104         if((dx || dy) && top) {
 105                 MouseMotionFuncType motion_callback = top->get_mouse_motion_callback();
 106                 if(motion_callback) {
 107                         Rect rect = top->get_absolute_rect();
 108                         motion_callback(top, mouse->pointer_x - rect.x, mouse->pointer_y - rect.y);
 109                 }
 110         }
 111
 112         MouseButtonFuncType button_callback;
 113         if((mouse->bnstate != prev_state) && top && (button_callback = top->get_mouse_button_callback())) {
 114                 int num_bits = sizeof mouse->bnstate * CHAR_BIT;
 115                 for(int i=0; i<num_bits; i++) {
 116                         int s = (mouse->bnstate >> i) & 1;
 117                         int prev_s = (prev_state >> i) & 1;
 118                         if(s != prev_s) {
 119                                 Rect rect = top->get_absolute_rect();
 120                                 button_callback(top, i, s, mouse->pointer_x - rect.x, mouse->pointer_y - rect.y);
 121                         }
 122                 }
 123         }
 124 }
 125
 126 void get_pointer_pos(int *x, int *y)
 127 {
 128         *x = mouse->pointer_x;
 129         *y = mouse->pointer_y;
 130 }
 131
 132 int get_button_state()
 133 {
 134         return mouse->bnstate;
 135 }
 136
 137 int get_button(int bn)
 138 {
 139         if(bn < 0 || bn >= 3) {
 140                 return 0;
 141         }
 142         return (mouse->bnstate & (1 << bn)) != 0;
 143 }
 144
 145 static int read_mouse()
 146 {
 147         int rd;
 148         signed char state[3] = {0, 0, 0};
 149
 150         if((rd = read(mouse->dev_fd, state, 3)) == -1) {
 151                 fprintf(stderr, "Unable to get mouse state : %s\n", strerror(errno));
 152                 return -1;
 153         }
 154
 155         mouse->bnstate = state[0] & 7;
 156         mouse->pointer_x += state[1];
 157         mouse->pointer_y -= state[2];
 158
 159         if(mouse->pointer_x < mouse->bounds.x) {
 160                 mouse->pointer_x = mouse->bounds.x;
 161         }
 162
 163         if(mouse->pointer_y < mouse->bounds.y) {
 164                 mouse->pointer_y = mouse->bounds.y;
 165         }
 166
 167         if(mouse->pointer_x > mouse->bounds.x + mouse->bounds.width - 1) {
 168                 mouse->pointer_x = mouse->bounds.x + mouse->bounds.width - 1;
 169         }
 170
 171         if(mouse->pointer_y > mouse->bounds.y + mouse->bounds.height - 1) {
 172                 mouse->pointer_y = mouse->bounds.y + mouse->bounds.height - 1;
 173         }
 174
 175         return 0;
 176 }
 177 #endif // WINNIE_FBDEV