Replace content CLI with Textual TUI

tools/content/tui/themes.py

@@ -0,0 +1,57 @@
+from textual.theme import Theme
+
+import site_themes
+
+
+def to_textual_theme(theme: dict) -> Theme:
+    colors = theme["colors"]
+    border_start, border_end = theme.get("activeBorder") or (colors["accent"], colors["accent"])
+    return Theme(
+        name=theme["id"],
+        primary=border_start,
+        secondary=colors["blue"],
+        accent=border_end,
+        foreground=colors["foreground"],
+        background=colors["dark_background"],
+        surface=colors["background"],
+        panel=colors["lighter_background"],
+        boost=colors["selection"],
+        warning=colors["yellow"],
+        error=colors["red"],
+        success=colors["green"],
+        dark=theme.get("mode") != "light",
+        variables={
+            "text-muted": colors["muted"],
+            "border": border_start,
+            "border-blurred": colors["selection"],
+            "block-cursor-background": colors["accent"],
+            "block-cursor-foreground": colors["dark_background"],
+            "block-cursor-text-style": "bold",
+            "block-cursor-blurred-background": colors["selection"],
+            "block-hover-background": colors["selection"],
+            "footer-key-foreground": colors["accent"],
+            "input-selection-background": f"{colors['accent']} 35%",
+            "input-cursor-background": colors["foreground"],
+            "scrollbar": colors["selection"],
+            "scrollbar-hover": colors["muted"],
+            "scrollbar-active": colors["accent"],
+        },
+    )
+
+
+def load_site_themes() -> list[Theme]:
+    try:
+        themes = site_themes.load_themes()
+    except (OSError, ValueError):
+        return []
+    textual_themes = []
+    for theme in themes:
+        try:
+            textual_themes.append(to_textual_theme(theme))
+        except (KeyError, ValueError):
+            continue
+    return textual_themes
+
+
+def default_theme_id() -> str | None:
+    return site_themes.default_theme_id()