refactor @ for parsing to separate file
This commit is contained in:
ConnorSkees
parent
13a96273e4
commit
05fde03697
143
src/atrule/for_rule.rs
Normal file
143
src/atrule/for_rule.rs
Normal file
@ -0,0 +1,143 @@
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use std::iter::Peekable;
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use num_traits::cast::ToPrimitive;
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use super::parse::eat_stmts;
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use super::AtRule;
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use crate::error::SassResult;
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use crate::scope::Scope;
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use crate::selector::Selector;
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use crate::unit::Unit;
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use crate::utils::{
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devour_whitespace, eat_ident, read_until_closing_curly_brace, read_until_open_curly_brace,
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};
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use crate::value::{Number, Value};
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use crate::Token;
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pub(crate) fn parse_for<I: Iterator<Item = Token>>(
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toks: &mut Peekable<I>,
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scope: &mut Scope,
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super_selector: &Selector,
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) -> SassResult<AtRule> {
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let mut stmts = Vec::new();
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devour_whitespace(toks);
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let var = match toks.next().ok_or("expected \"$\".")?.kind {
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'$' => eat_ident(toks, scope, super_selector)?,
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_ => return Err("expected \"$\".".into()),
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};
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devour_whitespace(toks);
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if toks.peek().is_none()
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|| eat_ident(toks, scope, super_selector)?.to_ascii_lowercase() != "from"
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{
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return Err("Expected \"from\".".into());
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}
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devour_whitespace(toks);
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let mut from_toks = Vec::new();
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let mut through = 0;
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while let Some(tok) = toks.next() {
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let mut these_toks = vec![tok];
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match these_toks[0].kind.to_ascii_lowercase() {
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't' => {
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these_toks.push(toks.next().unwrap());
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match these_toks[1].kind.to_ascii_lowercase() {
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'h' => {
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let r = toks.next().unwrap();
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these_toks.push(r);
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if r.kind != 'r' {
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from_toks.extend(these_toks);
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continue;
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}
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let o = toks.next().unwrap();
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these_toks.push(o);
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if o.kind != 'o' {
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from_toks.extend(these_toks);
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continue;
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}
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let u = toks.next().unwrap();
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these_toks.push(u);
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if u.kind != 'u' {
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from_toks.extend(these_toks);
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continue;
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}
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let g = toks.next().unwrap();
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these_toks.push(g);
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if g.kind != 'g' {
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from_toks.extend(these_toks);
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continue;
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}
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let h = toks.next().unwrap();
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these_toks.push(h);
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if h.kind != 'h' {
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from_toks.extend(these_toks);
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continue;
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}
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let peek = toks.peek().unwrap().kind;
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if peek.is_alphanumeric() || peek == '\\' {
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from_toks.extend(these_toks);
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continue;
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}
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through = 1;
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break;
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}
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'o' => {
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if toks.peek().unwrap().kind.is_whitespace() {
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break;
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} else {
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from_toks.extend(these_toks);
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}
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}
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_ => {
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from_toks.extend(these_toks);
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}
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}
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}
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'{' => {
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return Err("Expected \"to\" or \"through\".".into());
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}
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_ => from_toks.extend(these_toks),
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}
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}
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let from =
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match Value::from_tokens(&mut from_toks.into_iter().peekable(), scope, super_selector)? {
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Value::Dimension(n, _) => match n.to_integer().to_usize() {
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Some(v) => v,
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None => return Err(format!("{} is not a int.", n).into()),
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},
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v => return Err(format!("{} is not an integer.", v).into()),
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};
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devour_whitespace(toks);
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let to_toks = read_until_open_curly_brace(toks);
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toks.next();
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let to = match Value::from_tokens(&mut to_toks.into_iter().peekable(), scope, super_selector)? {
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Value::Dimension(n, _) => match n.to_integer().to_usize() {
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Some(v) => v,
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None => return Err(format!("{} is not a int.", n).into()),
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},
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v => return Err(format!("{} is not an integer.", v).into()),
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};
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let body = read_until_closing_curly_brace(toks);
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toks.next();
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devour_whitespace(toks);
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let (mut x, mut y);
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let iter: &mut dyn std::iter::Iterator<Item = usize> = if from < to {
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x = from..(to + through);
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&mut x
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} else {
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y = ((to - through)..(from + 1)).skip(1).rev();
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&mut y
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};
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for i in iter {
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scope.insert_var(&var, Value::Dimension(Number::from(i), Unit::None))?;
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stmts.extend(eat_stmts(
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&mut body.clone().into_iter().peekable(),
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scope,
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super_selector,
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)?);
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}
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Ok(AtRule::For(stmts))
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}
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@ -1,18 +1,15 @@
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use std::fmt::{self, Display};
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use std::iter::Peekable;
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use num_traits::cast::ToPrimitive;
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use crate::common::{Brackets, ListSeparator, Pos};
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use crate::error::SassResult;
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use crate::scope::Scope;
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use crate::selector::Selector;
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use crate::unit::Unit;
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use crate::utils::{
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devour_whitespace, eat_ident, read_until_closing_curly_brace, read_until_open_curly_brace,
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read_until_semicolon_or_closing_curly_brace,
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};
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use crate::value::{Number, Value};
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use crate::value::Value;
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use crate::{Stmt, Token};
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pub(crate) use function::Function;
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@ -21,6 +18,7 @@ pub(crate) use mixin::{eat_include, Mixin};
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use parse::eat_stmts;
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use unknown::UnknownAtRule;
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mod for_rule;
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mod function;
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mod if_rule;
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mod mixin;
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@ -184,135 +182,7 @@ impl AtRule {
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AtRuleKind::Extend => todo!("@extend not yet implemented"),
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AtRuleKind::If => AtRule::If(If::from_tokens(toks)?),
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AtRuleKind::Else => todo!("@else not yet implemented"),
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AtRuleKind::For => {
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let mut stmts = Vec::new();
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devour_whitespace(toks);
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let var = match toks.next().ok_or("expected \"$\".")?.kind {
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'$' => eat_ident(toks, scope, super_selector)?,
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_ => return Err("expected \"$\".".into()),
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};
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devour_whitespace(toks);
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if toks.peek().is_none()
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|| eat_ident(toks, scope, super_selector)?.to_ascii_lowercase() != "from"
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{
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return Err("Expected \"from\".".into());
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}
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devour_whitespace(toks);
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let mut from_toks = Vec::new();
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let mut through = 0;
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while let Some(tok) = toks.next() {
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let mut these_toks = vec![tok];
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match these_toks[0].kind.to_ascii_lowercase() {
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't' => {
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these_toks.push(toks.next().unwrap());
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match these_toks[1].kind.to_ascii_lowercase() {
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'h' => {
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let r = toks.next().unwrap();
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these_toks.push(r);
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if r.kind != 'r' {
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from_toks.extend(these_toks);
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continue;
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}
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let o = toks.next().unwrap();
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these_toks.push(o);
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if o.kind != 'o' {
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from_toks.extend(these_toks);
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continue;
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}
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let u = toks.next().unwrap();
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these_toks.push(u);
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if u.kind != 'u' {
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from_toks.extend(these_toks);
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continue;
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}
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let g = toks.next().unwrap();
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these_toks.push(g);
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if g.kind != 'g' {
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from_toks.extend(these_toks);
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continue;
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}
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let h = toks.next().unwrap();
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these_toks.push(h);
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if h.kind != 'h' {
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from_toks.extend(these_toks);
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continue;
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}
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let peek = toks.peek().unwrap().kind;
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if peek.is_alphanumeric() || peek == '\\' {
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from_toks.extend(these_toks);
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continue;
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}
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through = 1;
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break;
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}
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'o' => {
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if toks.peek().unwrap().kind.is_whitespace() {
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break;
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} else {
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from_toks.extend(these_toks);
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}
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}
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_ => {
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from_toks.extend(these_toks);
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}
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}
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}
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'{' => {
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return Err("Expected \"to\" or \"through\".".into());
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}
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_ => from_toks.extend(these_toks),
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}
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}
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let from = match Value::from_tokens(
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&mut from_toks.into_iter().peekable(),
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scope,
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super_selector,
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)? {
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Value::Dimension(n, _) => match n.to_integer().to_usize() {
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Some(v) => v,
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None => return Err(format!("{} is not a int.", n).into()),
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},
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v => return Err(format!("{} is not an integer.", v).into()),
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};
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devour_whitespace(toks);
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let to_toks = read_until_open_curly_brace(toks);
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toks.next();
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let to = match Value::from_tokens(
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&mut to_toks.into_iter().peekable(),
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scope,
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super_selector,
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)? {
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Value::Dimension(n, _) => match n.to_integer().to_usize() {
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Some(v) => v,
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None => return Err(format!("{} is not a int.", n).into()),
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},
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v => return Err(format!("{} is not an integer.", v).into()),
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};
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let body = read_until_closing_curly_brace(toks);
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toks.next();
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devour_whitespace(toks);
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let (mut x, mut y);
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let iter: &mut dyn std::iter::Iterator<Item = usize> = if from < to {
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x = from..(to + through);
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&mut x
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} else {
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y = ((to - through)..(from + 1)).skip(1).rev();
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&mut y
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};
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for i in iter {
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scope.insert_var(&var, Value::Dimension(Number::from(i), Unit::None))?;
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stmts.extend(eat_stmts(
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&mut body.clone().into_iter().peekable(),
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scope,
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super_selector,
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)?);
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}
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AtRule::For(stmts)
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}
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AtRuleKind::For => for_rule::parse_for(toks, scope, super_selector)?,
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AtRuleKind::While => {
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let mut stmts = Vec::new();
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devour_whitespace(toks);
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