#include <termios.h>
#include <unistd.h>
-#include "mouse.h"
#include "geom.h"
+#include "gfx.h"
+#include "mouse.h"
+
+#define BN_LEFT 1
+#define BN_RIGHT 2
+#define BN_MIDDLE 4
+
static int dev_fd = -1; // file descriptor for /dev/psaux
static Rect bounds;
static int pointer_x, pointer_y;
+static int bnstate;
bool init_mouse()
{
- if((dev_fd = open("/dev/psaux", O_NONBLOCK)) == -1) {
+ if((dev_fd = open("/dev/psaux", O_RDONLY)) == -1) {
fprintf(stderr, "Cannot open /dev/psaux : %s\n", strerror(errno));
return false;
}
+ set_mouse_bounds(get_screen_size());
return true;
}
void destroy_mouse()
{
- close(dev_fd);
+ if(dev_fd != -1) {
+ close(dev_fd);
+ dev_fd = -1;
+ }
}
void set_mouse_bounds(const Rect &rect)
/* TODO:
* - read all pending events from mouse fd (use O_NONBLOCK so that
* read will return -1 when there are no more events instead of blocking).
- * - process each event and update the pointer and button state
- * - send each pointer move and button press/release to the tompost window
+ */
+
+ int prev_state = bnstate;
+ int prev_x = pointer_x;
+ int prev_y = pointer_y;
+
+ if(read_mouse() == -1) {
+ return;
+ }
+
+ /* - process each event and update the pointer and button state
+ * - send each pointer move and button press/release to the topmost window
* with the pointer on it.
*/
}
int get_button_state(int bn)
{
- // TODO
+ return bnstate;
+}
+
+int get_button(int bn)
+{
+ if(bn < 0 || bn >= 3) {
+ return 0;
+ }
+ return (bnstate & (1 << bn)) != 0;
+}
+
+
+int read_mouse()
+{
+ int rd;
+ signed char state[3] = {0, 0, 0};
+
+ if((rd = read(dev_fd, state, 3)) == -1) {
+ fprintf(stderr, "Unable to get mouse state : %s\n", strerror(errno));
+ return -1;
+ }
+
+ bnstate = state[0] & 7;
+ pointer_x += state[1];
+ pointer_y -= state[2];
+
+ if(pointer_x < bounds.x) {
+ pointer_x = bounds.x;
+ }
+
+ if(pointer_y < bounds.y) {
+ pointer_y = bounds.y;
+ }
+
+ if(pointer_x > bounds.x + bounds.width - 1) {
+ pointer_x = bounds.x + bounds.width - 1;
+ }
+
+ if(pointer_y > bounds.y + bounds.height - 1) {
+ pointer_y = bounds.y + bounds.height - 1;
+ }
+
return 0;
}