basic barcode/KB I/O stuff with Typing Pool bureau

screenless/bureau/typing.py

@@ -0,0 +1,76 @@
+import evdev
+
+from bureau import Bureau
+
+KEYS = {
+        0: None, 1: u'ESC', 2: u'1', 3: u'2', 4: u'3', 5: u'4', 6: u'5', 7: u'6', 8: u'7', 9: u'8',
+        10: u'9', 11: u'0', 12: u'-', 13: u'=', 14: u'\b', 15: u'\t', 16: u'q', 17: u'w', 18: u'e', 19: u'r',
+        20: u't', 21: u'y', 22: u'u', 23: u'i', 24: u'o', 25: u'p', 26: u'[', 27: u']', 28: u'\n', 29: u'LCTRL',
+        30: u'a', 31: u's', 32: u'd', 33: u'f', 34: u'g', 35: u'h', 36: u'j', 37: u'k', 38: u'l', 39: u';',
+        40: u'"', 41: u'`', 42: u'LSHFT', 43: u'\\', 44: u'z', 45: u'x', 46: u'c', 47: u'v', 48: u'b', 49: u'n',
+        50: u'm', 51: u',', 52: u'', 53: u'/', 54: u'RSHFT', 56: u'LALT', 100: u'RALT'
+}
+
+
+class TypingPool(Bureau):
+    """
+    The typing pool is the bureau that converts keyboard, barcode scanner, etc.
+    input to messages and sends them to the responsible bureau.
+    """
+    name = "Typing Pool"
+    prefix = "TY"
+    version = 0
+
+    def __init__(self):
+        Bureau.__init__(self)
+
+        devices = map(evdev.InputDevice, evdev.list_devices())
+
+        self.devices = []
+        self.active_devices = []
+
+        # add anything that smells like a keyboard and grab focus
+        for dev in devices:
+            try:
+                if evdev.ecodes.KEY_A in dev.capabilities()[evdev.ecodes.EV_KEY]:
+                    print(dir(dev))
+                    print(dev.fn)
+                    # dev.grab()
+                    self.devices.append(dev)
+            except KeyError as err:
+                print("ignoring non-keyboard device: " + str(dev))
+
+        # if we don't have any active KB so tell the user to config one
+        if "active" in self.config:
+            # TODO: better error handling here
+            self.active_devices = list(map(evdev.InputDevice,
+                                  self.config["active"]["devices"].split()))
+        else:
+            print("you need to configure input hardware!")
+            print("add one of the following devices to TY.ini under [active]")
+            print("  devices = /dev/usb/kb1 /dev/input/whatever")
+        print("available keyboard devices:")
+        for dev in self.devices:
+            print(dev.fn, ":", dev.name, dev.info)
+
+    def run_io(self):
+        val = ""
+        #TODO: this is crap, needs to be multi-threaded and have one
+        #      such loop for each active device
+        self.active_devices[0].grab()
+        for ev in self.active_devices[0].read_loop():
+            if ev.type == evdev.ecodes.EV_KEY:
+                data = evdev.categorize(ev)
+                if data.keystate == 1:
+                    if data.scancode == 28:
+                        print("sending barcode:", val)
+                        val = ""
+                    else:
+                        try:
+                            val += KEYS[data.scancode]
+                        except KeyError:
+                            print("Error invalid keycode:", data.scancode)
+
+if __name__ == "__main__":
+    evd = TypingPool()
+    evd.run()