Module accessibility 

Accessibility Support

This module provides accessibility infrastructure for Tessera UI using AccessKit. It enables screen readers and other assistive technologies to interact with Tessera applications.

Architecture

• Stable IDs: Each component can have a stable accessibility ID that persists across frames
• Semantic Metadata: Components provide semantic information (role, label, state, actions)
• Decentralized: Component libraries decide their own semantics; the core only provides infrastructure

Usage

Components use the accessibility API through the input handler context:

use accesskit::{Action, Role};
use tessera_ui::tessera;

#[tessera]
fn my_button(label: String) {
    input_handler(Box::new(move |input| {
        // Set accessibility information
        input.accessibility()
            .role(Role::Button)
            .label(label.clone())
            .action(Action::Click);
         
        // Set action handler
        input.set_accessibility_action_handler(|action| {
            if action == Action::Click {
                // Handle click from assistive technology
            }
        });
    }));
}

Structs

AccessibilityId

A stable identifier for accessibility nodes.

AccessibilityNode

Semantic information for an accessibility node.

Type Aliases

AccessibilityActionHandler

Handler for accessibility actions.