modifier_machine.rs — tailwindcss Source File

Source Code

use crate::cursor;
use crate::extractor::arbitrary_value_machine::ArbitraryValueMachine;
use crate::extractor::arbitrary_variable_machine::ArbitraryVariableMachine;
use crate::extractor::machine::{Machine, MachineState};
use classification_macros::ClassifyBytes;

/// Extract modifiers from an input including the `/`.
///
/// E.g.:
///
/// ```text
/// bg-red-500/20
///           ^^^
///
/// bg-red-500/[20%]
///           ^^^^^^
///
/// bg-red-500/(--my-opacity)
///           ^^^^^^^^^^^^^^^
/// ```
#[derive(Debug, Default)]
pub struct ModifierMachine {
    arbitrary_value_machine: ArbitraryValueMachine,
    arbitrary_variable_machine: ArbitraryVariableMachine,
}

impl Machine for ModifierMachine {
    #[inline(always)]
    fn reset(&mut self) {}

    #[inline]
    fn next(&mut self, cursor: &mut cursor::Cursor<'_>) -> MachineState {
        // A modifier must start with a `/`, everything else is not a valid start of a modifier
        if Class::Slash != cursor.curr.into() {
            return MachineState::Idle;
        }

        let start_pos = cursor.pos;
        cursor.advance();

        match cursor.curr.into() {
            // Start of an arbitrary value:
            //
            // ```
            // bg-red-500/[20%]
            //            ^^^^^
            // ```
            Class::OpenBracket => match self.arbitrary_value_machine.next(cursor) {
                MachineState::Idle => self.restart(),
                MachineState::Done(_) => self.done(start_pos, cursor),
            },

            // Start of an arbitrary variable:
            //
            // ```
            // bg-red-500/(--my-opacity)
            //            ^^^^^^^^^^^^^^
            // ```
            Class::OpenParen => match self.arbitrary_variable_machine.next(cursor) {
                MachineState::Idle => self.restart(),
// ... (108 more lines)