OpenCentauri · pdscomp · May 13, 2026 · May 13, 2026 · May 13, 2026 · May 14, 2026
diff --git a/...ri/recipes-apps/fluidd/files/opencentauri-fluidd-theme/apply-opencentauri-fluidd-theme.py b/...ri/recipes-apps/fluidd/files/opencentauri-fluidd-theme/apply-opencentauri-fluidd-theme.py
@@ -0,0 +1,197 @@
+#!/usr/bin/env python3
+import json
+import re
+import sys
+from pathlib import Path
+
+
+APP_NAME = "OpenCentauri"
+DESCRIPTION = "OpenCentauri web interface for the Elegoo Centauri Carbon"
+PRIMARY_COLOR = "#D8DADC"
+LOGO_SRC = "logo_opencentauri.svg"
+ICON_SRC = "carbon-logo-red.webp"
+WORDMARK_SRC = "opencentauri-logo-small.png"
+THEME_CSS = "opencentauri-theme.css"
+
+
+def replace_once(text, old, new, path):
+    if old not in text:
+        raise RuntimeError(f"{path}: expected text not found: {old[:80]!r}")
+    return text.replace(old, new, 1)
+
+
+def patch_index_html(webroot):
+    path = webroot / "index.html"
+    text = path.read_text()
+    text = re.sub(r"<title>.*?</title>", f"<title>{APP_NAME}</title>", text, count=1)
+    # Add data-fluidd-theme to html tag for immediate CSS scoping (prevents FOUC)
+    text = text.replace("<html lang=\"en\">", f'<html lang="en" data-fluidd-theme="{APP_NAME}">')
+    text = re.sub(
+        r'<meta name="description" content="[^"]*" />',
+        f'<meta name="description" content="{DESCRIPTION}" />',
+        text,
+        count=1,
+    )
+    text = re.sub(
+        r'<link rel="icon" type="image/png" sizes="32x32" href="[^"]+" />',
+        f'<link rel="icon" type="image/webp" sizes="128x128" href="./{ICON_SRC}" />',
+        text,
+        count=1,
+    )
+    text = re.sub(
+        r'\s*<link rel="icon" type="image/png" sizes="16x16" href="[^"]+" />\n',
+        "\n",
+        text,
+        count=1,
+    )
+    text = re.sub(
+        r'<meta name="theme-color" content="[^"]*" />',
+        f'<meta name="theme-color" content="{PRIMARY_COLOR}" />',
+        text,
+        count=1,
+    )
+    text = re.sub(
+        r'<meta name="apple-mobile-web-app-title" content="[^"]*" />',
+        f'<meta name="apple-mobile-web-app-title" content="{APP_NAME}" />',
+        text,
+        count=1,
+    )
+    text = re.sub(
+        r'<link rel="apple-touch-icon" sizes="180x180" href="[^"]+" />',
+        f'<link rel="apple-touch-icon" sizes="128x128" href="./{ICON_SRC}" />',
+        text,
+        count=1,
+    )
+    text = re.sub(
+        r'<meta name="msapplication-TileImage" content="[^"]+" />',
+        f'<meta name="msapplication-TileImage" content="./{ICON_SRC}" />',
+        text,
+        count=1,
+    )
+    if THEME_CSS not in text:
+        text = text.replace(
+            '<link rel="manifest" href="./manifest.webmanifest">',
+            f'<link rel="stylesheet" href="./{THEME_CSS}">\n  <link rel="manifest" href="./manifest.webmanifest">',
+            1,
+        )
+    path.write_text(text)
+
+
+def patch_manifest(webroot):
+    path = webroot / "manifest.webmanifest"
+    manifest = json.loads(path.read_text())
+    manifest.update(
+        {
+            "name": APP_NAME,
+            "short_name": APP_NAME,
+            "description": DESCRIPTION,
+            "theme_color": PRIMARY_COLOR,
+            "icons": [
+                {
+                    "src": ICON_SRC,
+                    "sizes": "128x128",
+                    "type": "image/webp",
+                    "purpose": "any maskable",
+                }
+            ],
+        }
+    )
+    path.write_text(json.dumps(manifest, separators=(",", ":")))
+
+
+def patch_config(webroot):
+    path = webroot / "config.json"
+    config = json.loads(path.read_text())
+    presets = [p for p in config.get("themePresets", []) if p.get("name") != APP_NAME]
+    presets.insert(
+        0,
+        {
+            "name": APP_NAME,
+            "color": PRIMARY_COLOR,
+            "isDark": True,
+            "logo": {
+                "src": LOGO_SRC,
+                "dark": "#232323",
+                "light": "#ffffff",
+            },
+        },
+    )
+    config["themePresets"] = presets
+    # Set OpenCentauri as the default active theme for new users
+    config["theme"] = {
+        "color": PRIMARY_COLOR,
+        "isDark": True,
+        "logo": {
+            "src": LOGO_SRC,
+            "dark": "#232323",
+            "light": "#ffffff",
+        },
+    }
+    path.write_text(json.dumps(config, indent=2) + "\n")
+
+
+def patch_main_bundle(webroot):
+    """Patch the main JS bundle to add theme-aware dataset toggling."""
+    bundles = sorted((webroot / "assets").glob("index-*.js"))
+    if len(bundles) != 1:
+        raise RuntimeError(f"{webroot}: expected exactly one assets/index-*.js bundle, found {len(bundles)}")
+
+    path = bundles[0]
+    text = path.read_text()
+
+    # Patch onThemeChange to toggle a data attribute for CSS scoping.
+    # We detect OpenCentauri by logo src (not name) because the name field
+    # persists across theme switches via Fluidd's object-merge in updateTheme.
+    old_on_theme_change = "async onThemeChange(e,t){let n=Io.framework.theme;n.dark=t.isDark,n.currentTheme.primary=t.color,n.currentTheme[`primary-offset`]=new ft(t.color).desaturate(5).darken(10).toHexString(),n.themes.dark.logo=t.logo.light,n.themes.light.logo=t.logo.dark}"
+    new_on_theme_change = 'async onThemeChange(e,t){let n=Io.framework.theme;n.dark=t.isDark,n.currentTheme.primary=t.color,n.currentTheme[`primary-offset`]=new ft(t.color).desaturate(5).darken(10).toHexString(),n.themes.dark.logo=t.logo.light,n.themes.light.logo=t.logo.dark;document.documentElement.dataset.fluiddTheme=(t.logo?.src===`logo_opencentauri.svg`)?`OpenCentauri`:``}'
+    text = replace_once(text, old_on_theme_change, new_on_theme_change, path)
+
+    # Override the default favicon globally (all themes show OpenCentauri favicon)
+    old_icon = 'get defaultIconDataUrl(){let e=`<svg width=\"56\" height=\"56\" viewBox=\"0 0 56 56\" xmlns=\"http://www.w3.org/2000/svg\"><g><path fill=\"${this.primaryOffsetColor}\" d=\"m14.853 33.757 11.617 9.66q.196.169.419.287l.002.001.044.023.017.009.03.014.027.013.021.01.037.016.01.005c.263.111.54.173.817.185h.01l.044.002h.104l.046-.002h.007a2.3 2.3 0 0 0 .818-.186l.008-.003.041-.018.016-.007.03-.015.032-.015.014-.007.044-.023.004-.002a2.3 2.3 0 0 0 .419-.287l10.86-9.031 5.646 3.727L28 56 9.243 37.398Zm.409-14.452 11.425 7.35c.407.267.86.4 1.313.4s.905-.133 1.312-.4l11.426-7.349 8.737 4.462L28 41.628 6.525 23.767zM28 0l24.42 8.993L28 24.699 3.58 8.99Z\" /><path fill=\"${this.primaryColor}\" d=\"m28 0-.135.05h.15v24.64L52.42 8.991Zm12.738 19.307-11.425 7.347-.06.04a2.4 2.4 0 0 1-1.237.36v14.56l21.459-17.846zm-.347 15.08-10.86 9.031q-.196.167-.418.285l-.006.002-.043.024-.013.007-.033.016-.03.014-.015.007-.041.018-.008.004c-.263.112-.54.173-.819.185h-.007l-.045.002h-.037v12.002l18.021-17.87Z\" /></g></svg>`;return`data:image/svg+xml;base64,${btoa(e)}`}'
+    new_icon = f'get defaultIconDataUrl(){{return`./{ICON_SRC}`}}'
+    text = replace_once(text, old_icon, new_icon, path)
+
+    path.write_text(text)
+
+
+def patch_state_chunk(webroot):
+    """Patch the initial Vuex state so OpenCentauri is the default theme."""
+    chunks = sorted((webroot / "assets").glob("state-*.js"))
+    if not chunks:
+        return  # Not all builds have this chunk
+
+    old_theme = "theme:{isDark:!0,logo:{src:`logo_fluidd.svg`},color:`#2196F3`,backgroundLogo:!0}"
+    new_theme = f"theme:{{isDark:!0,logo:{{src:`{LOGO_SRC}`}},color:`{PRIMARY_COLOR}`,backgroundLogo:!0}}"
+
+    for path in chunks:
+        text = path.read_text()
+        if old_theme in text:
+            text = text.replace(old_theme, new_theme)
+            path.write_text(text)
+            return  # Patched successfully
+
+    raise RuntimeError(f"{webroot}/assets: expected hardcoded default theme not found in any state chunk")
+
+
+def verify_assets(webroot):
+    for name in (ICON_SRC, WORDMARK_SRC, LOGO_SRC, THEME_CSS):
+        path = webroot / name
+        if not path.exists():
+            raise RuntimeError(f"{path}: missing OpenCentauri theme asset")
+
+
+def main():
+    if len(sys.argv) != 2:
+        raise SystemExit(f"usage: {Path(sys.argv[0]).name} /path/to/fluidd-webroot")
+
+    webroot = Path(sys.argv[1])
+    verify_assets(webroot)
+    patch_index_html(webroot)
+    patch_manifest(webroot)
+    patch_config(webroot)
+    patch_main_bundle(webroot)
+    patch_state_chunk(webroot)
+
+
+if __name__ == "__main__":
+    main()
diff --git a/...ntauri/recipes-apps/fluidd/files/opencentauri-fluidd-theme/carbon-logo-red.webp b/...ntauri/recipes-apps/fluidd/files/opencentauri-fluidd-theme/carbon-logo-red.webp