fc-dioxus 0.1.2

//! State shared across components, without inventing new upstream values.

use super::id::Id;
use dioxus::prelude::EventHandler;

/// The orientation of a component.
#[derive(Debug, Default, Clone, Copy, PartialEq, Eq, Hash)]
#[non_exhaustive]
pub enum Orientation {
    /// A horizontal separator or row.
    #[default]
    Horizontal,
    /// A vertical separator or column.
    Vertical,
}

/// Whether a control can be activated, and whether it remains discoverable.
#[derive(Debug, Default, Clone, PartialEq, Eq, Hash)]
#[non_exhaustive]
pub enum Availability {
    /// The action is available.
    #[default]
    Enabled,
    /// Native disabled state, removed from sequential focus.
    Disabled,
    /// Focusable but inactive; visible explanatory text is referenced by ID.
    Unavailable {
        /// ID of the element explaining the unavailable action.
        reason: Id,
    },
}
impl Availability {
    /// Drop activation handlers for both forms of unavailability.
    #[must_use]
    pub fn guard<T: 'static>(&self, handler: Option<EventHandler<T>>) -> Option<EventHandler<T>> {
        if *self == Self::Enabled {
            handler
        } else {
            None
        }
    }
}

/// Upstream's lifecycle vocabulary.
#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
#[non_exhaustive]
pub enum Lifecycle {
    /// Not yet scheduled.
    Pending,
    /// Waiting to execute.
    Queued,
    /// Incremental output is arriving.
    Streaming,
    /// Work is executing.
    Running,
    /// Work completed.
    Complete,
    /// Work was cancelled.
    Aborted,
    /// Permission was denied.
    Denied,
    /// Work failed.
    Error,
}
impl Lifecycle {
    /// Every state, in lifecycle order.
    pub const ALL: &'static [Self] = &[
        Self::Pending,
        Self::Queued,
        Self::Streaming,
        Self::Running,
        Self::Complete,
        Self::Aborted,
        Self::Denied,
        Self::Error,
    ];
    /// Whether the work has finished, one way or another.
    #[must_use]
    pub const fn is_settled(self) -> bool {
        matches!(
            self,
            Self::Complete | Self::Aborted | Self::Denied | Self::Error
        )
    }
    /// The upstream attribute value.
    #[must_use]
    pub const fn as_str(self) -> &'static str {
        match self {
            Self::Pending => "pending",
            Self::Queued => "queued",
            Self::Streaming => "streaming",
            Self::Running => "running",
            Self::Complete => "complete",
            Self::Aborted => "aborted",
            Self::Denied => "denied",
            Self::Error => "error",
        }
    }
}

/// The author role in upstream's message contract.
#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
#[non_exhaustive]
pub enum MessageRole {
    /// User-authored message.
    User,
    /// Assistant-authored message.
    Assistant,
    /// System message.
    System,
    /// Tool result.
    Tool,
}
impl MessageRole {
    /// The upstream attribute value.
    #[must_use]
    pub const fn as_str(self) -> &'static str {
        match self {
            Self::User => "user",
            Self::Assistant => "assistant",
            Self::System => "system",
            Self::Tool => "tool",
        }
    }
}

/// A semantic HTML heading rank.
#[derive(Debug, Default, Clone, Copy, PartialEq, Eq, Hash)]
#[non_exhaustive]
pub enum HeadingLevel {
    /// Level 1 heading.
    H1,
    /// Level 2 heading.
    H2,
    /// Level 3 heading.
    #[default]
    H3,
    /// Level 4 heading.
    H4,
    /// Level 5 heading.
    H5,
    /// Level 6 heading.
    H6,
}