started work on injecting keycodes instead of configs-only

keymapper/X.py

@@ -264,7 +264,8 @@ def generate_symbols(name, include=DEFAULT_SYMBOLS_NAME, mapping=custom_mapping)
         keycodes = re.findall(r'<.+?>', f.read())
 
     xkb_symbols = []
-    for keycode, character in mapping:
+    for keycode, output in mapping:
+        target_keycode, character = output
         if f'<{keycode}>' not in keycodes:
             logger.error(f'Unknown keycode <{keycode}> for "{character}"')
             # don't append that one, otherwise X would crash when loading

keymapper/gtk/row.py

@@ -86,7 +86,7 @@ class Row(Gtk.ListBoxRow):
             return
 
         # keycode is already set by some other row
-        if custom_mapping.get(new_keycode) is not None:
+        if custom_mapping.get_character(new_keycode) is not None:
             msg = f'Keycode {new_keycode} is already mapped'
             logger.info(msg)
             self.window.get('status_bar').push(CTX_KEYCODE, msg)

keymapper/gtk/window.py

@@ -301,12 +301,12 @@ class Window:
         parse_symbols_file(self.selected_device, self.selected_preset)
 
         key_list = self.get('key_list')
-        for keycode, character in custom_mapping:
+        for keycode, output in custom_mapping:
             single_key_mapping = Row(
                 window=self,
                 delete_callback=self.on_row_removed,
                 keycode=keycode,
-                character=character
+                character=output[1]
             )
             key_list.insert(single_key_mapping, -1)
 

keymapper/linux.py

@@ -24,6 +24,7 @@
 
 import subprocess
 import multiprocessing
+import threading
 
 import evdev
 
@@ -46,9 +47,10 @@ class KeycodeReader:
     """Keeps reading keycodes in the background for the UI to use.
 
     When a button was pressed, the newest keycode can be obtained from this
-    object. This was written before I figured out there is get_keycode in Gdk.
+    object.
     """
-    def __init__(self):
+    def __init__(self, device):
+        self.device = device
         self.virtual_devices = []
 
     def clear(self):
@@ -58,22 +60,35 @@ class KeycodeReader:
             while virtual_device.read_one():
                 pass
 
-    def start_reading(self, device):
-        """Tell the evdev lib to start looking for keycodes.
-
-        If read is called without prior start_reading, no keycodes
-        will be available.
-        """
-        paths = _devices[device]['paths']
+    def start_injecting_worker(self, path):
+        """Inject keycodes for one of the virtual devices."""
+        device = evdev.InputDevice(path)
+        uinput = evdev.UInput
+        for event in device.read_loop():
+            if event.type == evdev.ecodes.EV_KEY and event.value == 1:
+                # value: 1 for down, 0 for up, 2 for hold.
+                # this happens to report key codes that are 8 lower
+                # than the ones reported by xev
+                # TODO the mapping writes something starting from 256 to not
+                #  clash with existing mappings of other devices
+                input_keycode = event.code
+                output_keycode = custom_mapping.get_keycode(event.code)
+                output_char = custom_mapping.get_character(event.code)
+                print('output', output_keycode, output_char)
+                uinput.write(evdev.ecodes.EV_KEY, evdev.ecodes.KEY_A)
+
+    def start_injecting(self):
+        """Read keycodes and inject the mapped character forever."""
+        paths = _devices[self.device]['paths']
 
         logger.debug(
-            'Starting reading keycodes for %s on %s',
-            device,
+            'Starting injecting the mapping for %s on %s',
+            self.device,
             ', '.join(paths)
         )
 
         # Watch over each one of the potentially multiple devices per hardware
-        self.virtual_devices = [
+        virtual_devices = [
             evdev.InputDevice(path)
             for path in paths
         ]
@@ -94,7 +109,6 @@ class KeycodeReader:
         return newest_keycode
 
 
-# not used anymore since the overlooked get_keycode function is now being used
 # keycode_reader = KeycodeReader()
 
 

keymapper/mapping.py

@@ -52,6 +52,8 @@ class Mapping:
         previous_keycode : int or None
             If None, will not remove any previous mapping.
         new_keycode : int
+            The source keycode, what the mouse would report without any
+            modification.
         character : string or string[]
             If an array of strings, will put something like { [ a, A ] };
             into the symbols file.
@@ -73,7 +75,16 @@ class Mapping:
             character = ', '.join([str(c) for c in character])
 
         if new_keycode and character:
-            self._mapping[new_keycode] = str(character)
+            target_keycode = new_keycode + 256
+            if target_keycode >= 512:
+                # because key-mappers keycodes file has a maximum of 511,
+                # while all system keycodes have a maximum of 255.
+                # To avoid clashes, keycodes <= 255 should not be injected.
+                raise ValueError(
+                    f'Expected target_keycode {target_keycode} to not '
+                    f'be >= 512. '
+                )
+            self._mapping[new_keycode] = (target_keycode, str(character))
             if new_keycode != previous_keycode:
                 # clear previous mapping of that code, because the line
                 # representing that one will now represent a different one.
@@ -99,14 +110,18 @@ class Mapping:
         self._mapping = {}
         self.changed = True
 
-    def get(self, keycode):
+    def get_keycode(self, keycode):
+        """Read the output keycode that is mapped to this input keycode."""
+        return self._mapping.get(keycode, (None, None))[0]
+
+    def get_character(self, keycode):
         """Read the character that is mapped to this keycode.
 
         Parameters
         ----------
         keycode : int
         """
-        return self._mapping.get(keycode)
+        return self._mapping.get(keycode, (None, None))[1]
 
 
 # one mapping object for the whole application that holds all

tests/testcases/config.py

@@ -38,8 +38,8 @@ class TestConfig(unittest.TestCase):
         custom_mapping.change(None, 11, 'KP_1')
         custom_mapping.change(None, 12, 3)
         custom_mapping.change(None, 13, ['a', 'A', 'NoSymbol', 3])
-        self.assertEqual(custom_mapping.get(12), '3')
-        self.assertEqual(custom_mapping.get(13), 'a, A, NoSymbol, 3')
+        self.assertEqual(custom_mapping.get_character(12), '3')
+        self.assertEqual(custom_mapping.get_character(13), 'a, A, NoSymbol, 3')
         if os.path.exists(tmp):
             shutil.rmtree(tmp)
 
@@ -66,12 +66,12 @@ class TestConfig(unittest.TestCase):
 
         # it should be loaded correctly after saving
         parse_symbols_file('device_a', 'preset_b')
-        self.assertIsNone(custom_mapping.get(9))
-        self.assertEqual(custom_mapping.get(10), 'a')
-        self.assertEqual(custom_mapping.get(11), 'KP_1')
-        self.assertEqual(custom_mapping.get(12), '3')
-        self.assertEqual(custom_mapping.get(13), 'a, A, NoSymbol, 3')
-        self.assertIsNone(custom_mapping.get(14))
+        self.assertIsNone(custom_mapping.get_character(9))
+        self.assertEqual(custom_mapping.get_character(10), 'a')
+        self.assertEqual(custom_mapping.get_character(11), 'KP_1')
+        self.assertEqual(custom_mapping.get_character(12), '3')
+        self.assertEqual(custom_mapping.get_character(13), 'a, A, NoSymbol, 3')
+        self.assertIsNone(custom_mapping.get_character(14))
 
     def test_default_symbols(self):
         # keycodes are missing

tests/testcases/integration.py

@@ -151,8 +151,8 @@ class Integration(unittest.TestCase):
         time.sleep(0.2)
         self.assertEqual(len(self.get_rows()), 3)
 
-        self.assertEqual(custom_mapping.get(10), 'a')
-        self.assertEqual(custom_mapping.get(11), 'b')
+        self.assertEqual(custom_mapping.get_character(10), 'a')
+        self.assertEqual(custom_mapping.get_character(11), 'b')
         self.assertTrue(custom_mapping.changed)
 
         self.window.on_save_preset_clicked(None)
@@ -174,22 +174,22 @@ class Integration(unittest.TestCase):
                 row.get_style_context().list_classes()
             )
 
-        self.assertEqual(custom_mapping.get(10), 'c')
-        self.assertEqual(custom_mapping.get(11), 'b')
+        self.assertEqual(custom_mapping.get_character(10), 'c')
+        self.assertEqual(custom_mapping.get_character(11), 'b')
         self.assertTrue(custom_mapping.changed)
 
     def test_rename_and_save(self):
         custom_mapping.change(None, 14, 'a')
         self.assertEqual(self.window.selected_preset, 'new preset')
         self.window.on_save_preset_clicked(None)
-        self.assertEqual(custom_mapping.get(14), 'a')
+        self.assertEqual(custom_mapping.get_character(14), 'a')
 
         custom_mapping.change(None, 14, 'b')
         self.window.get('preset_name_input').set_text('asdf')
         self.window.on_save_preset_clicked(None)
         self.assertEqual(self.window.selected_preset, 'asdf')
         self.assertTrue(os.path.exists(f'{USERS_SYMBOLS}/device_1/asdf'))
-        self.assertEqual(custom_mapping.get(14), 'b')
+        self.assertEqual(custom_mapping.get_character(14), 'b')
 
     def test_select_device_and_preset(self):
         class FakeDropdown(Gtk.ComboBoxText):

tests/testcases/mapping.py

@@ -33,35 +33,35 @@ class TestMapping(unittest.TestCase):
         # 1 is not assigned yet, ignore it
         self.mapping.change(1, 2, 'a')
         self.assertTrue(self.mapping.changed)
-        self.assertIsNone(self.mapping.get(1))
-        self.assertEqual(self.mapping.get(2), 'a')
+        self.assertIsNone(self.mapping.get_character(1))
+        self.assertEqual(self.mapping.get_character(2), 'a')
         self.assertEqual(len(self.mapping), 1)
 
         # change 2 to 3 and change a to b
         self.mapping.change(2, 3, 'b')
-        self.assertIsNone(self.mapping.get(2))
-        self.assertEqual(self.mapping.get(3), 'b')
+        self.assertIsNone(self.mapping.get_character(2))
+        self.assertEqual(self.mapping.get_character(3), 'b')
         self.assertEqual(len(self.mapping), 1)
 
         # add 4
         self.mapping.change(None, 4, 'c')
-        self.assertEqual(self.mapping.get(3), 'b')
-        self.assertEqual(self.mapping.get(4), 'c')
+        self.assertEqual(self.mapping.get_character(3), 'b')
+        self.assertEqual(self.mapping.get_character(4), 'c')
         self.assertEqual(len(self.mapping), 2)
 
         # change the mapping of 4 to d
         self.mapping.change(None, 4, 'd')
-        self.assertEqual(self.mapping.get(4), 'd')
+        self.assertEqual(self.mapping.get_character(4), 'd')
         self.assertEqual(len(self.mapping), 2)
 
         # this also works in the same way
         self.mapping.change(4, 4, 'e')
-        self.assertEqual(self.mapping.get(4), 'e')
+        self.assertEqual(self.mapping.get_character(4), 'e')
         self.assertEqual(len(self.mapping), 2)
 
         # and this
         self.mapping.change('4', '4', 'f')
-        self.assertEqual(self.mapping.get(4), 'f')
+        self.assertEqual(self.mapping.get_character(4), 'f')
         self.assertEqual(len(self.mapping), 2)
 
         # non-int keycodes are ignored
@@ -70,11 +70,11 @@ class TestMapping(unittest.TestCase):
 
     def test_change_multiple(self):
         self.mapping.change(None, 1, ['a', 'A'])
-        self.assertEqual(self.mapping.get(1), 'a, A')
+        self.assertEqual(self.mapping.get_character(1), 'a, A')
 
         self.mapping.change(1, 2, ['b', 'B'])
-        self.assertEqual(self.mapping.get(2), 'b, B')
-        self.assertIsNone(self.mapping.get(1))
+        self.assertEqual(self.mapping.get_character(2), 'b, B')
+        self.assertIsNone(self.mapping.get_character(1))
 
     def test_clear(self):
         # does nothing
@@ -90,9 +90,9 @@ class TestMapping(unittest.TestCase):
         self.mapping.change(None, 20, 'KP_2')
         self.mapping.change(None, 30, 'KP_3')
         self.mapping.clear(20)
-        self.assertEqual(self.mapping.get(10), 'KP_1')
-        self.assertIsNone(self.mapping.get(20))
-        self.assertEqual(self.mapping.get(30), 'KP_3')
+        self.assertEqual(self.mapping.get_character(10), 'KP_1')
+        self.assertIsNone(self.mapping.get_character(20))
+        self.assertEqual(self.mapping.get_character(30), 'KP_3')
 
     def test_iterate_and_convert(self):
         self.mapping.change(None, 10, 1)
@@ -100,7 +100,7 @@ class TestMapping(unittest.TestCase):
         self.mapping.change(None, 30, 3)
         self.assertListEqual(
             list(self.mapping),
-            [(10, '1'), (20, '2'), (30, '3')]
+            [(10, (266, '1')), (20, (276, '2')), (30, (286, '3'))]
         )