// SPDX-License-Identifier: MIT OR Apache-2.0

use unicode_script::Script;

use super::Fallback;

/// An empty platform-specific font fallback list.
#[derive(Debug)]
pub struct PlatformFallback;

impl Fallback for PlatformFallback {
    fn common_fallback(&self) -> &'static [&'static str] {
        common_fallback()
    }

    fn forbidden_fallback(&self) -> &'static [&'static str] {
        forbidden_fallback()
    }

    fn script_fallback(
        &self,
        script: unicode_script::Script,
        locale: &str,
    ) -> &'static [&'static str] {
        script_fallback(script, locale)
    }
}

// Fallbacks to use after any script specific fallbacks
fn common_fallback() -> &'static [&'static str] {
    &[]
}

// Fallbacks to never use
fn forbidden_fallback() -> &'static [&'static str] {
    &[]
}

// Fallbacks to use per script
fn script_fallback(_script: Script, _locale: &str) -> &'static [&'static str] {
    &[]
}