Fix flag colours and marked/suspended/buried colours not showing up

src/addon/colors.py

@@ -1,4 +1,5 @@
 from typing import Any, Optional, Tuple, List, Dict
+import re
 
 from anki.hooks import wrap
 import aqt
@@ -13,6 +14,22 @@
 
 conf = ConfigManager()
 
+# Sourced from aqt.browser.table.backend_color_to_aqt_color
+# ACCENT_CARD and ACCENT_NOTE are passed to ThemeManager.qcolor, which doesn't support #RGBA
+ARGB_ONLY_ENTRIES = (
+    "STATE_MARKED",
+    "STATE_SUSPENDED",
+    "STATE_BURIED",
+    "FLAG_1",
+    "FLAG_2",
+    "FLAG_3",
+    "FLAG_4",
+    "FLAG_5",
+    "FLAG_6",
+    "FLAG_7",
+    "ACCENT_CARD",
+    "ACCENT_NOTE"
+)
 
 # ReColor Python Colors
 def recolor_python() -> None:
@@ -41,6 +58,25 @@ def hex_with_alpha_to_rgba(hex_color: str) -> str:
     return hex_color
 
 
+RGBA_RE = re.compile(r"\((\d+),\s*(\d+),\s*(\d+),\s*(\d+\.*\d+?)\)\s*")
+
+def hex_with_alpha_to_argb(hex_color: str) -> str:
+    # ARGB_ONLY_ENTRIES get passed directly into a QColor, so they need to be of RGB hex format
+    # QColor also takes #ARGB, so prepend the alpha instead of removing it (https://doc.qt.io/qt-6/qcolor.html#fromString)
+    if hex_color.startswith("#") and len(hex_color) == 9:
+        # assume #RGBA, convert to #ARGB
+        return "#" + hex_color[7:9] + hex_color[1:7]
+    elif hex_color.startswith("rgba") and (m := re.match(RGBA_RE, hex_color[4:])):
+        # convert rgba(...) to #ARGB
+        r = int(m.group(1))
+        g = int(m.group(2))
+        b = int(m.group(3))
+        a = int(255 * float(m.group(4)))
+        return f"#{a:02x}{r:02x}{g:02x}{b:02x}"
+    # fallback to original
+    return hex_color
+
+
 def replace_color(
     color_entries: Dict[str, List[str]],
     anki_name: str,
@@ -50,8 +86,9 @@ def replace_color(
         addon_name = anki_name
     if (anki_color := getattr(aqt.colors, anki_name, None)) is not None:
         color_entry = color_entries[addon_name]
-        anki_color["light"] = hex_with_alpha_to_rgba(color_entry[1])
-        anki_color["dark"] = hex_with_alpha_to_rgba(color_entry[2])
+        color_map_fn = hex_with_alpha_to_rgba if anki_name not in ARGB_ONLY_ENTRIES else hex_with_alpha_to_argb
+        anki_color["light"] = color_map_fn(color_entry[1])
+        anki_color["dark"] = color_map_fn(color_entry[2])
         setattr(aqt.colors, anki_name, anki_color)