rules: better determination of keycodes and handle keysym level

docs/rules.md

@@ -155,14 +155,21 @@ For settings that use gestures as an argument the internal name of the gesture i
 which can be found in the GESTURE2_GESTURES_LABELS structure in lib/logitech_receiver/settings_templates.
 For boolean settings '~' can be used to toggle the setting.
 
-A `KeyPress` action takes a sequence of X11 key symbols and simulates a chorded keypress on the keyboard,
-such as "A", "Shift+A", or "Control+A".
-Use separate  `KeyPress` actions for multiple characters.
-If Solaar can determine the current modifier keys,
-any key symbols that correspond to these modifier keys are not pressed.
+A `KeyPress` action takes a sequence of X11 key symbols, such as "a" or "Control+a",
+and simulates a chorded keypress on the keyboard to produce these symbols.
+Use separate  `KeyPress` actions for multiple characters,
+i.e., don't use a single `KeyPress` like 'a+b'.
+If a key symbol can only be produced by a shfited or level 3 keypress, e.g., "A",
+then Solaar will add keypresses to produce that keysymbol,
+e.g., simulating a left shift keypress to get "A" instead of "a".
+If Solaar can determine the current key modifiers (shift, control, etc.)
+any key symbols that correspond to these modifier keys are not pressed,
+so if the shift key is currently down on a keyboard Solaar will not bother to simulate a shift key.
+
 Simulating input in Linux is complex.
 Solaar has to try to determine which keyboard key corresponds to which input character as it cannot directly
-simulate inputting a character and, unfortunately, this determination can go wrong in multiple ways and is more likely
+simulate inputting a key symbol.
+Unfortunately, this determination can go wrong in several ways and is more likely
 to go wrong under Wayland than under X11.
 
 A `MouseScroll` action takes a sequence of two numbers and simulates a horizontal and vertical mouse scroll of these amounts.

lib/logitech_receiver/diversion.py

@@ -836,14 +836,14 @@ class KeyPress(Action):
     def keysym_to_keycode(self, keysym, modifiers):  # maybe should take shift into account
         group = kbdgroup() or 0
         keycodes = gkeymap.get_entries_for_keyval(keysym)
-        if len(keycodes.keys) == 1:
-            k = keycodes.keys[0]
-            return k.keycode
-        else:
-            for k in keycodes.keys:
-                if group is None or group == k.group:
-                    return k.keycode
+        (keycode, level) = (None, None)
+        for k in keycodes.keys:
+            if (group == k.group or len(keycodes.keys) == 1) and k.keycode < 256 and (level is None or k.level < level):
+                keycode = k.keycode
+                level = k.level
+        if keycode is None:
             _log.warn('rule KeyPress key symbol not currently available %s', self)
+        return (keycode, level)
 
     def __str__(self):
         return 'KeyPress: ' + ' '.join(self.key_names)
@@ -852,17 +852,29 @@ class KeyPress(Action):
         code = modifier_code(k)
         return not (code is not None and modifiers & (1 << code))
 
+    def mods(self, level, modifiers, direction):
+        if level == 2 or level == 3:
+            (sk, _) = self.keysym_to_keycode(XK_KEYS.get('ISO_Level3_Shift', None), modifiers)
+            if sk and self.needed(sk, modifiers):
+                simulate_key(sk, direction)
+        if level == 1 or level == 3:
+            (sk, _) = self.keysym_to_keycode(XK_KEYS.get('Shift_L', None), modifiers)
+            if sk and self.needed(sk, modifiers):
+                simulate_key(sk, direction)
+
     def keyDown(self, keysyms, modifiers):
         for k in keysyms:
-            keycode = self.keysym_to_keycode(k, modifiers)
+            (keycode, level) = self.keysym_to_keycode(k, modifiers)
             if keycode and self.needed(keycode, modifiers):
+                self.mods(level, modifiers, _KEY_PRESS)
                 simulate_key(keycode, _KEY_PRESS)
 
     def keyUp(self, keysyms, modifiers):
         for k in keysyms:
-            keycode = self.keysym_to_keycode(k, modifiers)
+            (keycode, level) = self.keysym_to_keycode(k, modifiers)
             if keycode and self.needed(keycode, modifiers):
                 simulate_key(keycode, _KEY_RELEASE)
+                self.mods(level, modifiers, _KEY_RELEASE)
 
     def evaluate(self, feature, notification, device, status, last_result):
         if gkeymap: