feat: animate the UDT border gradient on the cards

1 files changed, 17 insertions, 2 deletions

diff --git a/deckit/theme.py b/deckit/theme.py
index 7aa347b..5603d5b 100644
--- a/deckit/theme.py
+++ b/deckit/theme.py
@@ -10,9 +10,11 @@ from pathlib import Path
 
 PALETTE_LINE = re.compile(r"^\s*([a-z0-9]+)\s*:\s*(#[0-9a-fA-F]{6,8});", re.M)
 ACCENT = re.compile(r"accent:\s*(#[0-9a-fA-F]{6,8})")
+BORDER = re.compile(r"rgb\(\s*([0-9a-fA-F]{6})\s*\)")
 
 PALETTE_PATH = Path.home() / ".config" / "rofi" / "udt" / "palette.rasi"
 ACCENT_PATH = Path.home() / ".cache" / "udt" / "udt-accent.rasi"
+BORDER_PATH = Path.home() / ".cache" / "udt" / "udt-border.lua"
 
 # Catppuccin Macchiato, used before UDT has ever generated its files.
 FALLBACK = {
@@ -35,10 +37,19 @@ def parse_accent(text: str) -> str | None:
     return m[1] if m else None
 
 
-def css(colors: dict, accent: str | None) -> str:
+def parse_border(text: str) -> list[str]:
+    """The three hues Hyprland rotates in the window border, as hex."""
+    return ["#" + value.lower() for value in BORDER.findall(text)]
+
+
+def css(colors: dict, accent: str | None, border: list[str] | None = None) -> str:
     lines = [":root {"]
     lines += [f"  --udt-{name}: {value};" for name, value in colors.items()]
     lines.append(f"  --udt-accent: {accent or FALLBACK['accent']};")
+    stops = border if border and len(border) >= 3 else [
+        FALLBACK["mauve"], FALLBACK["lavender"], FALLBACK["blue"]]
+    for index, value in enumerate(stops[:3], 1):
+        lines.append(f"  --udt-border-{index}: {value};")
     lines.append("}")
     return "\n".join(lines) + "\n"
 
@@ -55,4 +66,8 @@ def load() -> str:
         accent = parse_accent(ACCENT_PATH.read_text())
     except OSError:
         accent = None
-    return css(colors, accent)
+    try:
+        border = parse_border(BORDER_PATH.read_text())
+    except OSError:
+        border = None
+    return css(colors, accent, border)