[REF] hw_{driver, scanner}: Barcode scanners as IoT Devices

Barcode scanners are now part of KeyboardUSBDriver. We also add
the possibility to change the keyboard/scanner layout from an
action. The list of available layout can be retrieved with a new
route.

`hw_scanner` has been removed. Backward compatibility is ensured
because the name of the route that is now used in community is the
same that was used previously.

TaskID: 1939455

2 files changed, 0 insertions, 244 deletions

diff --git a/addons/hw_scanner/controllers/__init__.py b/addons/hw_scanner/controllers/__init__.py
deleted file mode 100644
index 5d4b25db9c0..00000000000
--- a/addons/hw_scanner/controllers/__init__.py
+++ /dev/null
@@ -1,4 +0,0 @@
-# -*- coding: utf-8 -*-
-# Part of Odoo. See LICENSE file for full copyright and licensing details.
-
-from . import main
diff --git a/addons/hw_scanner/controllers/main.py b/addons/hw_scanner/controllers/main.py
deleted file mode 100644
index 86a01497b46..00000000000
--- a/addons/hw_scanner/controllers/main.py
+++ /dev/null
@@ -1,240 +0,0 @@
-# -*- coding: utf-8 -*-
-# Part of Odoo. See LICENSE file for full copyright and licensing details.
-
-import logging
-import time
-from os import listdir
-from os.path import join, isdir
-try:
-    from queue import Queue, Empty
-except ImportError:
-    from Queue import Queue, Empty # pylint: disable=deprecated-module
-from select import select
-from threading import Thread, Lock
-
-from odoo import http
-
-from odoo.addons.hw_proxy.controllers import main as hw_proxy
-
-_logger = logging.getLogger(__name__)
-
-try:
-    import evdev
-except ImportError:
-    _logger.error('Odoo module hw_scanner depends on the evdev python module')
-    evdev = None
-
-class ScannerDevice():
-    def __init__(self, path):
-        self.evdev = evdev.InputDevice(path)
-        self.evdev.grab()
-
-        self.barcode = []
-        self.shift = False
-
-class Scanner(Thread):
-    def __init__(self):
-        Thread.__init__(self)
-        self.lock = Lock()
-        self.status = {'status':'connecting', 'messages':[]}
-        self.input_dir = '/dev/input/by-id/'
-        self.open_devices = []
-        self.barcodes = Queue()
-        self.keymap = {
-            2: ("1","!"),
-            3: ("2","@"),
-            4: ("3","#"),
-            5: ("4","$"),
-            6: ("5","%"),
-            7: ("6","^"),
-            8: ("7","&"),
-            9: ("8","*"),
-            10:("9","("), 
-            11:("0",")"), 
-            12:("-","_"), 
-            13:("=","+"), 
-            # 14 BACKSPACE
-            # 15 TAB 
-            16:("q","Q"), 
-            17:("w","W"),
-            18:("e","E"),
-            19:("r","R"),
-            20:("t","T"),
-            21:("y","Y"),
-            22:("u","U"),
-            23:("i","I"),
-            24:("o","O"),
-            25:("p","P"),
-            26:("[","{"),
-            27:("]","}"),
-            # 28 ENTER
-            # 29 LEFT_CTRL
-            30:("a","A"),
-            31:("s","S"),
-            32:("d","D"),
-            33:("f","F"),
-            34:("g","G"),
-            35:("h","H"),
-            36:("j","J"),
-            37:("k","K"),
-            38:("l","L"),
-            39:(";",":"),
-            40:("'","\""),
-            41:("`","~"),
-            # 42 LEFT SHIFT
-            43:("\\","|"),
-            44:("z","Z"),
-            45:("x","X"),
-            46:("c","C"),
-            47:("v","V"),
-            48:("b","B"),
-            49:("n","N"),
-            50:("m","M"),
-            51:(",","<"),
-            52:(".",">"),
-            53:("/","?"),
-            # 54 RIGHT SHIFT
-            57:(" "," "),
-        }
-
-    def lockedstart(self):
-        with self.lock:
-            if not self.isAlive():
-                self.daemon = True
-                self.start()
-
-    def set_status(self, status, message = None):
-        if status == self.status['status']:
-            if message != None and message != self.status['messages'][-1]:
-                self.status['messages'].append(message)
-        else:
-            self.status['status'] = status
-            if message:
-                self.status['messages'] = [message]
-            else:
-                self.status['messages'] = []
-
-        if status == 'error' and message:
-            _logger.error('Barcode Scanner Error: '+message)
-        elif status == 'disconnected' and message:
-            _logger.info('Disconnected Barcode Scanner: %s', message)
-
-    def get_devices(self):
-        try:
-            if not evdev:
-                return []
-
-            if not isdir(self.input_dir):
-                return []
-
-            new_devices = [device for device in listdir(self.input_dir)
-                           if join(self.input_dir, device) not in [dev.evdev.fn for dev in self.open_devices]]
-            scanners = [device for device in new_devices
-                        if (('kbd' in device) and ('keyboard' not in device.lower()))
-                        or ('barcode' in device.lower()) or ('scanner' in device.lower())]
-
-            for device in scanners:
-                _logger.debug('opening device %s', join(self.input_dir,device))
-                self.open_devices.append(ScannerDevice(join(self.input_dir,device)))
-
-            if self.open_devices:
-                self.set_status('connected','Connected to '+ str([dev.evdev.name for dev in self.open_devices]))
-            else:
-                self.set_status('disconnected','Barcode Scanner Not Found')
-
-            return self.open_devices
-        except Exception as e:
-            self.set_status('error',str(e))
-            return []
-
-    def release_device(self, dev):
-        self.open_devices.remove(dev)
-
-    def get_barcode(self):
-        """ Returns a scanned barcode. Will wait at most 5 seconds to get a barcode, and will
-            return barcode scanned in the past if they are not older than 5 seconds and have not
-            been returned before. This is necessary to catch barcodes scanned while the POS is
-            busy reading another barcode
-        """
-
-        self.lockedstart()
-
-        while True:
-            try:
-                timestamp, barcode = self.barcodes.get(True, 5)
-                if timestamp > time.time() - 5: 
-                    return barcode
-            except Empty:
-                return ''
-    
-    def get_status(self):
-        self.lockedstart()
-        return self.status
-
-    def _get_open_device_by_fd(self, fd):
-        for dev in self.open_devices:
-            if dev.evdev.fd == fd:
-                return dev
-
-    def run(self):
-        """ This will start a loop that catches all keyboard events, parse barcode
-            sequences and put them on a timestamped queue that can be consumed by
-            the point of sale's requests for barcode events 
-        """
-        
-        self.barcodes = Queue()
-        
-        barcode  = []
-        shift    = False
-        devices  = None
-
-        while True: # barcodes loop
-            devices = self.get_devices()
-
-            try:
-                while True: # keycode loop
-                    r,w,x = select({dev.fd: dev for dev in [d.evdev for d in devices]},[],[],5)
-                    if len(r) == 0: # timeout
-                        break
-
-                    for fd in r:
-                        device = self._get_open_device_by_fd(fd)
-
-                        if not evdev.util.is_device(device.evdev.fn):
-                            _logger.info('%s disconnected', str(device.evdev))
-                            self.release_device(device)
-                            break
-
-                        events = device.evdev.read()
-
-                        for event in events:
-                            if event.type == evdev.ecodes.EV_KEY:
-                                # _logger.debug('Evdev Keyboard event %s',evdev.categorize(event))
-                                if event.value == 1: # keydown events
-                                    if event.code in self.keymap:
-                                        if device.shift:
-                                            device.barcode.append(self.keymap[event.code][1])
-                                        else:
-                                            device.barcode.append(self.keymap[event.code][0])
-                                    elif event.code == 42 or event.code == 54: # SHIFT
-                                        device.shift = True
-                                    elif event.code == 28: # ENTER, end of barcode
-                                        _logger.debug('pushing barcode %s from %s', ''.join(device.barcode), str(device.evdev))
-                                        self.barcodes.put( (time.time(),''.join(device.barcode)) )
-                                        device.barcode = []
-                                elif event.value == 0: #keyup events
-                                    if event.code == 42 or event.code == 54: # LEFT SHIFT
-                                        device.shift = False
-
-            except Exception as e:
-                self.set_status('error',str(e))
-
-scanner_thread = None
-if evdev:
-    scanner_thread = Scanner()
-    hw_proxy.drivers['scanner'] = scanner_thread
-
-class ScannerDriver(hw_proxy.Proxy):
-    @http.route('/hw_proxy/scanner', type='json', auth='none', cors='*')
-    def scanner(self):
-        return scanner_thread.get_barcode() if scanner_thread else None