css_ast 0.0.31

CSS Abstract Syntax Trees with visitable nodes and style value types.
Documentation 
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use super::{
	BorderImageOutsetStyleValue, BorderImageRepeatStyleValue, BorderImageSliceStyleValue, BorderImageSourceStyleValue,
	BorderImageStyleValue, BorderImageWidthStyleValue,
};
use css_parse::{Cursor, Diagnostic, Optionals3, Parse, Parser, Result as ParseResult, T};

impl<'a> Parse<'a> for BorderImageStyleValue<'a> {
	fn parse<I>(p: &mut Parser<'a, I>) -> ParseResult<Self>
	where
		I: Iterator<Item = Cursor> + Clone,
	{
		let mut source = None;
		let mut slice = None;
		let mut width = None;
		let mut outset = None;
		let mut repeat = None;
		loop {
			if source.is_none() && p.peek::<BorderImageSourceStyleValue>() {
				source = Some(p.parse::<BorderImageSourceStyleValue>()?);
			} else if slice.is_none() && p.peek::<BorderImageSliceStyleValue>() {
				slice = Some(p.parse::<BorderImageSliceStyleValue>()?);
				if p.peek::<T![/]>() {
					let slash = p.parse::<T![/]>()?;
					let first = p.parse_if_peek::<BorderImageWidthStyleValue>()?;
					if p.peek::<T![/]>() {
						let second_slash = p.parse::<T![/]>()?;
						outset = Some((slash, first, second_slash, p.parse::<BorderImageOutsetStyleValue>()?));
					} else if let Some(first) = first {
						width = Some((slash, first));
					} else {
						Err(Diagnostic::new(p.peek_n(1), Diagnostic::unexpected))?
					}
				}
			} else if repeat.is_none() && p.peek::<BorderImageRepeatStyleValue>() {
				repeat = Some(p.parse::<BorderImageRepeatStyleValue>()?);
			} else {
				break;
			}
		}
		if let Some(outset) = outset {
			let slice = slice.expect("outset is only parsed after slice");
			return Ok(Self::BorderImageSourceBorderImageSliceBorderImageOutsetBorderImageRepeat {
				border_image_source: source,
				border_image_slice_border_image_outset: Some((slice, outset)),
				border_image_repeat: repeat,
			});
		}
		if let Some(width) = width {
			let slice = slice.expect("width is only parsed after slice");
			return Ok(Self::BorderImageSourceBorderImageSliceBorderImageWidthBorderImageRepeat {
				border_image_source: source,
				border_image_slice_border_image_width: Some((slice, width)),
				border_image_repeat: repeat,
			});
		}
		if source.is_none() && slice.is_none() && repeat.is_none() {
			Err(Diagnostic::new(p.peek_n(1), Diagnostic::unexpected))?
		}
		Ok(Self::BorderImageSourceBorderImageSliceBorderImageRepeat(Optionals3(source, slice, repeat)))
	}
}

#[cfg(test)]
mod tests {
	use super::super::*;
	use crate::CssAtomSet;
	use css_parse::{assert_parse, assert_parse_error, assert_peek_false};

	#[test]
	fn test_box_shadow_offset() {
		assert_parse!(CssAtomSet::ATOMS, BoxShadowOffsetStyleValue, "none");
		assert_parse!(CssAtomSet::ATOMS, BoxShadowOffsetStyleValue, "10px");
		assert_parse!(CssAtomSet::ATOMS, BoxShadowOffsetStyleValue, "10px 20px");
		assert_parse!(CssAtomSet::ATOMS, BoxShadowOffsetStyleValue, "none,10px");
		assert_parse!(CssAtomSet::ATOMS, BoxShadowOffsetStyleValue, "10px,20px 30px");
		assert_peek_false!(CssAtomSet::ATOMS, BoxShadowOffsetStyleValue, "");
		assert_peek_false!(CssAtomSet::ATOMS, BoxShadowOffsetStyleValue, "red");
	}

	#[test]
	fn test_box_shadow() {
		assert_parse!(CssAtomSet::ATOMS, BoxShadowStyleValue, "none");
		assert_parse!(CssAtomSet::ATOMS, BoxShadowStyleValue, "0 0 0 .2rem rgba(0,123,255,.25)");
		assert_parse!(CssAtomSet::ATOMS, BoxShadowStyleValue, "0 1px 1px rgba(0,0,0,.075)inset");
		assert_parse!(CssAtomSet::ATOMS, BoxShadowStyleValue, "10px 20px 5px red");
		assert_parse!(CssAtomSet::ATOMS, BoxShadowStyleValue, "10px 20px inset");
		assert_parse!(CssAtomSet::ATOMS, BoxShadowStyleValue, "0 0 0 transparent,0 0 0 transparent");
		assert_parse!(CssAtomSet::ATOMS, BoxShadowStyleValue, "0 1px 1px rgba(0,0,0,.075),0 0 6px rgba(0,0,0,.05)");
		assert_peek_false!(CssAtomSet::ATOMS, BoxShadowStyleValue, "");
		assert_parse_error!(CssAtomSet::ATOMS, BoxShadowStyleValue, "red");
	}

	#[test]
	fn test_writes() {
		assert_parse!(CssAtomSet::ATOMS, BorderTopColorStyleValue, "red");
		assert_parse!(CssAtomSet::ATOMS, BorderClipStyleValue, "1fr");
		assert_parse!(CssAtomSet::ATOMS, BorderClipStyleValue, "1fr 1fr 1fr");
		assert_parse!(CssAtomSet::ATOMS, BorderClipStyleValue, "1fr 20px 2fr 40rem");
		assert_parse!(CssAtomSet::ATOMS, BoxShadowPositionStyleValue, "outset");
		assert_parse!(CssAtomSet::ATOMS, BoxShadowPositionStyleValue, "inset,inset");
		assert_parse!(CssAtomSet::ATOMS, BoxShadowPositionStyleValue, "inset,inset,inset,outset,inset");
		assert_parse!(CssAtomSet::ATOMS, BorderImageOutsetStyleValue, "10");
		assert_parse!(CssAtomSet::ATOMS, BorderImageOutsetStyleValue, "10px");
		assert_parse!(CssAtomSet::ATOMS, BorderImageOutsetStyleValue, "10px 10rem 10q 10em");
		assert_parse!(CssAtomSet::ATOMS, BorderImageOutsetStyleValue, "10 1ric 10 10");
		assert_parse!(CssAtomSet::ATOMS, BorderImageRepeatStyleValue, "stretch");
		assert_parse!(CssAtomSet::ATOMS, BorderImageRepeatStyleValue, "stretch stretch");
	}

	#[test]
	fn test_errors() {
		assert_parse_error!(CssAtomSet::ATOMS, BorderImageOutsetStyleValue, "-10");
	}

	#[test]
	fn test_border_color() {
		assert_parse!(CssAtomSet::ATOMS, BorderColorStyleValue, "red");
		assert_parse!(CssAtomSet::ATOMS, BorderColorStyleValue, "red blue");
		assert_parse!(CssAtomSet::ATOMS, BorderColorStyleValue, "red blue green");
		assert_parse!(CssAtomSet::ATOMS, BorderColorStyleValue, "red blue green yellow");
		assert_parse!(CssAtomSet::ATOMS, BorderColorStyleValue, "stripes(red 1fr,blue 2fr)");
		assert_parse!(CssAtomSet::ATOMS, BorderColorStyleValue, "red stripes(red 1fr,blue 2fr)");
		assert_peek_false!(CssAtomSet::ATOMS, BorderColorStyleValue, "");
		assert_peek_false!(CssAtomSet::ATOMS, BorderColorStyleValue, "auto");
		assert_parse_error!(CssAtomSet::ATOMS, BorderColorStyleValue, "red blue green yellow purple");
	}

	#[test]
	fn test_border_image_slice() {
		assert_parse!(CssAtomSet::ATOMS, BorderImageSliceStyleValue, "0");
		assert_parse!(CssAtomSet::ATOMS, BorderImageSliceStyleValue, "50%");
		assert_parse!(CssAtomSet::ATOMS, BorderImageSliceStyleValue, "10 20");
		assert_parse!(CssAtomSet::ATOMS, BorderImageSliceStyleValue, "10 20 30 40");
		assert_parse!(CssAtomSet::ATOMS, BorderImageSliceStyleValue, "10% fill");
		assert_parse!(CssAtomSet::ATOMS, BorderImageSliceStyleValue, "fill 10%");
		assert_peek_false!(CssAtomSet::ATOMS, BorderImageSliceStyleValue, "");
		assert_peek_false!(CssAtomSet::ATOMS, BorderImageSliceStyleValue, "auto");
	}

	#[test]
	fn test_border_image_width() {
		assert_parse!(CssAtomSet::ATOMS, BorderImageWidthStyleValue, "auto");
		assert_parse!(CssAtomSet::ATOMS, BorderImageWidthStyleValue, "1");
		assert_parse!(CssAtomSet::ATOMS, BorderImageWidthStyleValue, "10px");
		assert_parse!(CssAtomSet::ATOMS, BorderImageWidthStyleValue, "50%");
		assert_parse!(CssAtomSet::ATOMS, BorderImageWidthStyleValue, "1 2");
		assert_parse!(CssAtomSet::ATOMS, BorderImageWidthStyleValue, "1 2 3 4");
		assert_parse!(CssAtomSet::ATOMS, BorderImageWidthStyleValue, "auto 10px 1 50%");
		assert_peek_false!(CssAtomSet::ATOMS, BorderImageWidthStyleValue, "");
		assert_peek_false!(CssAtomSet::ATOMS, BorderImageWidthStyleValue, "none");
	}

	#[test]
	fn test_border_image() {
		assert_parse!(CssAtomSet::ATOMS, BorderImageStyleValue, "none");
		assert_parse!(CssAtomSet::ATOMS, BorderImageStyleValue, "url(border.svg)");
		assert_parse!(CssAtomSet::ATOMS, BorderImageStyleValue, "url(border.svg) 30");
		assert_parse!(CssAtomSet::ATOMS, BorderImageStyleValue, "url(border.svg) 30 fill");
		assert_parse!(CssAtomSet::ATOMS, BorderImageStyleValue, "url(border.svg) 30 / 10px");
		assert_parse!(CssAtomSet::ATOMS, BorderImageStyleValue, "url(border.svg) 30 / 10px / 2");
		assert_parse!(CssAtomSet::ATOMS, BorderImageStyleValue, "url(border.svg) 30 / / 2");
		assert_parse!(CssAtomSet::ATOMS, BorderImageStyleValue, "url(border.svg) 30 round");
		assert_parse!(CssAtomSet::ATOMS, BorderImageStyleValue, "url(border.svg) 30 / 10px repeat");
		assert_parse!(CssAtomSet::ATOMS, BorderImageStyleValue, "stretch");
		assert_peek_false!(CssAtomSet::ATOMS, BorderImageStyleValue, "");
		assert_peek_false!(CssAtomSet::ATOMS, BorderImageStyleValue, "/ 10px");
		assert_parse_error!(CssAtomSet::ATOMS, BorderImageStyleValue, "url(a.svg) url(b.svg)");
	}

	#[test]
	fn test_border_shape() {
		assert_parse!(CssAtomSet::ATOMS, BorderShapeStyleValue, "none");
		assert_peek_false!(CssAtomSet::ATOMS, BorderShapeStyleValue, "");
		assert_peek_false!(CssAtomSet::ATOMS, BorderShapeStyleValue, "auto");
	}

	#[test]
	fn test_corner_shorthands() {
		assert_parse!(CssAtomSet::ATOMS, CornerTopLeftStyleValue, "10px");
		assert_parse!(CssAtomSet::ATOMS, CornerTopLeftStyleValue, "round");
		assert_parse!(CssAtomSet::ATOMS, CornerTopLeftStyleValue, "10px round");
		assert_parse!(CssAtomSet::ATOMS, CornerTopRightStyleValue, "5px squircle");
		assert_parse!(CssAtomSet::ATOMS, CornerTopStyleValue, "10px");
		assert_parse!(CssAtomSet::ATOMS, CornerTopStyleValue, "10px 20px");
		assert_peek_false!(CssAtomSet::ATOMS, CornerTopLeftStyleValue, "");
		assert_peek_false!(CssAtomSet::ATOMS, CornerTopLeftStyleValue, "red");
	}
}