chore: initial studio-theme-accessibility 0.1.0

Signed-off-by: flemming-it <stefan.a.flemming@googlemail.com>

.gitignore

@@ -0,0 +1,2 @@
+target/
+Cargo.lock

Cargo.toml

@@ -0,0 +1,32 @@
+# Standalone Cargo.toml — targets wasm32-wasip2.
+#
+# Build:
+#   cargo build --release --target wasm32-wasip2
+#
+# Output: target/wasm32-wasip2/release/studio_theme_accessibility.wasm
+
+[package]
+name = "studio_theme_accessibility"
+version = "0.1.0"
+edition = "2021"
+authors = ["Dr. Stefan Flemming <platform@flemming.ai>"]
+license = "Apache-2.0"
+publish = false
+description = "F∆I Studio plugin — WCAG AA high-contrast Studio theme."
+repository = "https://git.flemming.ai/fai-plugins/studio-theme-accessibility"
+rust-version = "1.85"
+
+[lib]
+crate-type = ["cdylib"]
+
+[dependencies]
+fai-plugin-sdk = { path = "../../fai_plugin_sdk_rust" }
+
+[package.metadata.component]
+package = "fai:studio-plugin"
+
+[profile.release]
+opt-level = "s"
+lto = true
+codegen-units = 1
+strip = true

MODULE.de.md

@@ -0,0 +1,8 @@
+# accessibility
+
+Barrierefreies WCAG-AA-Theme mit starkem Kontrast.
+
+Eines der mit F∆I Studio gelieferten Theme-Plugins. Nach
+Installation erscheint es unter **Einstellungen → Themes**
+neben den eingebauten Hell- und Dunkel-Themes. Auswahl
+schaltet die gesamte Studio-Oberfläche um — ohne Neustart.

MODULE.md

@@ -0,0 +1,20 @@
+# accessibility
+
+WCAG AA high-contrast Studio theme.
+
+This is one of F∆I Studio's bundled theme plugins. When
+installed, it appears in **Settings → Themes** alongside the
+built-in light and dark themes. Select it and the entire
+Studio UI re-themes immediately — no restart required.
+
+## When to pick this theme
+
+- Operators with low vision or colour-vision deficiency
+- Bright-sunlight outdoor / kiosk deployments
+- Any deployment where the public sector's accessibility
+  rules demand a verified high-contrast option
+
+Every foreground/background pair meets WCAG 2.2 AA
+(≥ 4.5:1 for normal text); on-surface pairs hit AAA. Pure
+black + pure white surfaces; deep-navy or sky-blue
+primary depending on brightness.

README.md

@@ -0,0 +1,22 @@
+# studio-theme-accessibility
+
+WCAG AA high-contrast Studio theme.
+
+Ships a Material 3 ColorScheme pair (light + dark) through
+the WIT `theme` export. Studio loads it as a
+`studio.theme.accessibility` capability and switches the app's
+ColorScheme when the operator picks it from the themes
+picker.
+
+## Build
+
+```bash
+cargo build --release --target wasm32-wasip2
+```
+
+Output: `target/wasm32-wasip2/release/studio_theme_accessibility.wasm`.
+
+## Palette
+
+See `src/lib.rs` for the 14 ARGB tokens per brightness, in
+Material 3 order (primary → on_primary → … → outline_variant).

module.yaml

@@ -0,0 +1,17 @@
+schema_version: 3
+provider: fai
+name: studio-theme-accessibility
+version: 0.1.0
+
+provides:
+  - capability: studio.theme.accessibility
+    version: 0.1.0
+
+inputs: {}
+outputs: {}
+
+permissions: []
+
+studio_extension:
+  hooks:
+    - theme

rust-toolchain.toml

@@ -0,0 +1,4 @@
+[toolchain]
+channel = "1.86"
+targets = ["wasm32-wasip2"]
+components = ["rustfmt", "clippy"]

src/lib.rs

@@ -0,0 +1,94 @@
+//! `studio.theme.accessibility` — WCAG AA high-contrast theme.
+//!
+//! Optimised for low-vision operators + bright-sunlight
+//! environments. Light mode: pure white surface, pure black
+//! text, deep-navy primary (8.6:1 on white). Dark mode: pure
+//! black surface, pure white text, light-blue primary
+//! (≥7:1). Every foreground/background pair meets WCAG 2.2 AA
+//! (≥4.5:1 for normal text); the on-surface pairs hit AAA.
+
+#![allow(clippy::result_large_err)]
+
+use fai_plugin_sdk::{bindings, export_plugin};
+
+type ColorScheme = bindings::fai::studio_plugin::plugin_types::ColorScheme;
+type PluginError = bindings::fai::studio_plugin::plugin_types::PluginError;
+type RenderedOutput = bindings::fai::studio_plugin::plugin_types::RenderedOutput;
+
+const ACCESSIBILITY_LIGHT: [u32; 14] = [
+    0xFF003366, // primary           — navy (8.6:1 on white)
+    0xFFFFFFFF, // on_primary
+    0xFF006400, // secondary         — dark green
+    0xFFFFFFFF, // on_secondary
+    0xFF663300, // tertiary          — dark amber
+    0xFFFFFFFF, // on_tertiary
+    0xFF990000, // error             — deep red
+    0xFFFFFFFF, // on_error
+    0xFFFFFFFF, // surface           — pure white
+    0xFF000000, // on_surface        — pure black
+    0xFFF0F0F0, // surface_variant
+    0xFF1A1A1A, // on_surface_variant
+    0xFF000000, // outline
+    0xFF4D4D4D, // outline_variant
+];
+
+const ACCESSIBILITY_DARK: [u32; 14] = [
+    0xFF66B3FF, // primary           — light blue (≥7:1 on black)
+    0xFF000000, // on_primary
+    0xFF99FF99, // secondary
+    0xFF000000, // on_secondary
+    0xFFFFCC66, // tertiary
+    0xFF000000, // on_tertiary
+    0xFFFF6666, // error
+    0xFF000000, // on_error
+    0xFF000000, // surface           — pure black
+    0xFFFFFFFF, // on_surface        — pure white
+    0xFF1A1A1A, // surface_variant
+    0xFFFFFFFF, // on_surface_variant
+    0xFFFFFFFF, // outline
+    0xFFB3B3B3, // outline_variant
+];
+
+struct AccessibilityPlugin;
+
+impl bindings::exports::fai::studio_plugin::theme::Guest for AccessibilityPlugin {
+    fn theme_for(brightness: String) -> Result<ColorScheme, PluginError> {
+        let tokens = match brightness.as_str() {
+            "light" => ACCESSIBILITY_LIGHT.to_vec(),
+            "dark" => ACCESSIBILITY_DARK.to_vec(),
+            other => {
+                return Err(PluginError::Declined(format!(
+                    "accessibility has no scheme for brightness '{other}' \
+                     (supported: light, dark)"
+                )));
+            }
+        };
+        Ok(ColorScheme { brightness, tokens })
+    }
+}
+
+impl bindings::exports::fai::studio_plugin::translate::Guest for AccessibilityPlugin {
+    fn translate(
+        _text: String,
+        _from_locale: String,
+        _to_locale: String,
+    ) -> Result<String, PluginError> {
+        Err(PluginError::Declined(
+            "accessibility is a theme plugin and does not translate".to_string(),
+        ))
+    }
+}
+
+impl bindings::exports::fai::studio_plugin::output_view::Guest for AccessibilityPlugin {
+    fn render(
+        _mime_type: String,
+        _data: Vec<u8>,
+    ) -> Result<RenderedOutput, PluginError> {
+        Err(PluginError::Declined(
+            "accessibility is a theme plugin and does not render outputs"
+                .to_string(),
+        ))
+    }
+}
+
+export_plugin!(AccessibilityPlugin);