Struct PaneAccessibilityPreferences 

pub struct PaneAccessibilityPreferences {
    pub reduced_motion: bool,
    pub high_contrast: bool,
    pub large_target: bool,
}

Host-agnostic accessibility preferences for pane interaction (bd-21pbi.5).

These three adaptive modes are applied uniformly across hosts so a pointer-free, low-vision, or touch user gets the same behavior in the terminal and in the browser:

• Reduced motion collapses affordance micro-animations to instant steps (see PaneAffordanceMotion) — the state change is preserved, the motion is not.
• High contrast lifts splitter / focus-ring affordance colors to WCAG AAA (applied by the host theme; see ftui_style::PaneAffordanceTheme, which takes this flag).
• Large target enlarges splitter handles / hit regions for precision and touch ergonomics (see enlarge_target).

Crucially, none of these modes changes the keyboard command vocabulary, the focus graph, or announcements — pane semantics are mode-invariant. They are not inputs to resolve at all; they only affect presentation (motion, color, size). This is what keeps keyboard/focus behavior deterministic and identical regardless of the active accessibility modes.

Fields

reduced_motion: bool

Collapse affordance micro-animations to instant steps.

high_contrast: bool

Use high-contrast (WCAG AAA) affordance colors.

large_target: bool

Enlarge splitter handles / hit regions.

Implementations

impl PaneAccessibilityPreferences

pub const fn none() -> Self

No accessibility modes enabled (equivalent to Default).

pub const fn all() -> Self

All accessibility modes enabled.

pub const fn with_reduced_motion(self, on: bool) -> Self

Set the reduced-motion preference.

pub const fn with_high_contrast(self, on: bool) -> Self

Set the high-contrast preference.

pub const fn with_large_target(self, on: bool) -> Self

Set the large-target preference.

pub const fn any(self) -> bool

Whether any adaptive mode is active.

pub fn affordance_motion(self) -> PaneAffordanceMotion

The affordance micro-animation policy implied by these preferences: the default timing, with motion stepped when reduced-motion is set.

pub fn enlarge_target(self, base: u16) -> u16

The minimum interactive target size (in cells) for a base size.

In large-target mode a base of n cells grows to ~150% (rounded up), with at least a +1-cell bump so even a 1-cell rail becomes easier to hit; otherwise base is returned unchanged. Monotonic non-decreasing in base, and never smaller than base.

Trait Implementations

impl Clone for PaneAccessibilityPreferences

fn clone(&self) -> PaneAccessibilityPreferences

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for PaneAccessibilityPreferences

impl Debug for PaneAccessibilityPreferences

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for PaneAccessibilityPreferences

fn default() -> PaneAccessibilityPreferences

Returns the “default value” for a type.

impl Eq for PaneAccessibilityPreferences

impl PartialEq for PaneAccessibilityPreferences

fn eq(&self, other: &PaneAccessibilityPreferences) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for PaneAccessibilityPreferences