[WIP] Keyboard event handling

[pistorm] / input / input.c

diff --git a/input/input.c b/input/input.c
index b0274e34366f08f4d6cb0aebb2467897e3a76d73..9958a990d3c27233d765d36b6b65751d26354116 100644 (file)
--- a/input/input.c
+++ b/input/input.c
@@ -2,13 +2,114 @@
 #include <unistd.h>
 #include <linux/input.h>
 
-int kbhit()
+static int lshift = 0, rshift = 0, lctrl = 0, rctrl = 0, lalt = 0, altgr = 0;
+extern int mouse_fd;
+extern int keyboard_fd;
+
+enum keypress_type {
+  KEYPRESS_RELEASE,
+  KEYPRESS_PRESS,
+  KEYPRESS_REPEAT,
+};
+
+int handle_modifier(struct input_event *ev) {
+  int *target_modifier = NULL;
+  if (ev->value != KEYPRESS_REPEAT && (ev->code == KEY_LEFTSHIFT || ev->code == KEY_RIGHTSHIFT || ev->code == KEY_LEFTALT || ev->code == KEY_RIGHTALT || ev->code == KEY_LEFTCTRL || ev->code == KEY_RIGHTCTRL)) {
+    switch(ev->code) {
+      case KEY_LEFTSHIFT:
+        target_modifier = &lshift;
+        break;
+      case KEY_RIGHTSHIFT:
+        target_modifier = &rshift;
+        break;
+      case KEY_LEFTALT:
+        target_modifier = &lalt;
+        break;
+      case KEY_RIGHTALT:
+        target_modifier = &altgr;
+        break;
+      case KEY_LEFTCTRL:
+        target_modifier = &lshift;
+        break;
+      case KEY_RIGHTCTRL:
+        target_modifier = &rshift;
+        break;
+    }
+    *target_modifier = (ev->value == KEYPRESS_RELEASE) ? 0 : 1;
+    return 1;
+  }
+  else {
+    return 0;
+  }
+}
+
+#define KEYCASE(a, b, c)case a: return (lshift || rshift) ? c : b;
+
+char char_from_input_event(struct input_event *ev) {
+  switch(ev->code) {
+    KEYCASE(KEY_A, 'a', 'A');
+    KEYCASE(KEY_B, 'b', 'B');
+    KEYCASE(KEY_C, 'c', 'C');
+    KEYCASE(KEY_D, 'd', 'D');
+    KEYCASE(KEY_E, 'e', 'E');
+    KEYCASE(KEY_F, 'f', 'F');
+    KEYCASE(KEY_G, 'g', 'G');
+    KEYCASE(KEY_H, 'h', 'H');
+    KEYCASE(KEY_I, 'i', 'I');
+    KEYCASE(KEY_J, 'j', 'J');
+    KEYCASE(KEY_K, 'k', 'K');
+    KEYCASE(KEY_L, 'l', 'L');
+    KEYCASE(KEY_M, 'm', 'M');
+    KEYCASE(KEY_N, 'n', 'N');
+    KEYCASE(KEY_O, 'o', 'O');
+    KEYCASE(KEY_P, 'p', 'P');
+    KEYCASE(KEY_Q, 'q', 'Q');
+    KEYCASE(KEY_R, 'r', 'R');
+    KEYCASE(KEY_S, 's', 'S');
+    KEYCASE(KEY_T, 't', 'T');
+    KEYCASE(KEY_U, 'u', 'U');
+    KEYCASE(KEY_V, 'c', 'V');
+    KEYCASE(KEY_W, 'w', 'W');
+    KEYCASE(KEY_X, 'x', 'X');
+    KEYCASE(KEY_Y, 'y', 'Y');
+    KEYCASE(KEY_Z, 'z', 'Z');
+    KEYCASE(KEY_1, '1', '!');
+    KEYCASE(KEY_2, '2', '@');
+    KEYCASE(KEY_3, '3', '#');
+    KEYCASE(KEY_4, '4', '$');
+    KEYCASE(KEY_5, '5', '%');
+    KEYCASE(KEY_6, '6', '^');
+    KEYCASE(KEY_7, '7', '&');
+    KEYCASE(KEY_8, '8', '*');
+    KEYCASE(KEY_9, '9', '(');
+    KEYCASE(KEY_0, '0', ')');
+    KEYCASE(KEY_F12, 0x1B, 0x1B);
+    default:
+      return 0;
+  }
+}
+
+int get_key_char(char *c)
 {
+  if (keyboard_fd == -1)
+    return 0;
+
+  struct input_event ie;
+  while(read(keyboard_fd, &ie, sizeof(struct input_event)) != -1) {
+    if (ie.type == EV_KEY) {
+      if (handle_modifier(&ie))
+        continue;
+      char ret = char_from_input_event(&ie);
+      if (ret != 0) {
+        *c = ret;
+        return 1;
+      }
+    }
+  }
+
   return 0;
 }
 
-extern int mouse_fd;
-
 int get_mouse_status(char *x, char *y, char *b) {
   struct input_event ie;
   if (read(mouse_fd, &ie, sizeof(struct input_event)) != -1) {