From 17d40c6057c88f4c432b0d7bac88e1b84cb7e67f Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Wed, 17 Apr 2024 14:03:36 +0200 Subject: Adding upstream version 1.65.0+dfsg1. Signed-off-by: Daniel Baumann --- vendor/minifier/src/css/token.rs | 51 ++++++++++++++++++++++++---------------- 1 file changed, 31 insertions(+), 20 deletions(-) (limited to 'vendor/minifier/src/css') diff --git a/vendor/minifier/src/css/token.rs b/vendor/minifier/src/css/token.rs index d2d738840..58e416fcd 100644 --- a/vendor/minifier/src/css/token.rs +++ b/vendor/minifier/src/css/token.rs @@ -571,9 +571,17 @@ pub(super) fn tokenize<'a>(source: &'a str) -> Result, &'static str> } fn clean_tokens(mut v: Vec>) -> Vec> { + // This function may remove multiple elements from the vector. Ideally we'd + // use `Vec::retain`, but the traversal requires inspecting the previously + // retained token and the next token, which `Vec::retain` doesn't allow. So + // we have to use a lower-level mechanism. let mut i = 0; + // Index of the previous retained token, if there is one. + let mut ip: Option = None; let mut is_in_calc = false; let mut paren = 0; + // A vector of bools indicating which elements are to be retained. + let mut b = Vec::with_capacity(v.len()); while i < v.len() { if v[i] == Token::Other("calc") { @@ -587,39 +595,42 @@ fn clean_tokens(mut v: Vec>) -> Vec> { } } + let mut retain = true; if v[i].is_useless() { - if i > 0 && v[i - 1] == Token::Char(ReservedChar::CloseBracket) { + #[allow(clippy::if_same_then_else)] + if ip.is_some() && v[ip.unwrap()] == Token::Char(ReservedChar::CloseBracket) { if i + 1 < v.len() && (v[i + 1].is_useless() || v[i + 1] == Token::Char(ReservedChar::OpenCurlyBrace)) { - v.remove(i); - continue; + retain = false; } - } else if i > 0 - && (v[i - 1] == Token::Other("and") - || v[i - 1] == Token::Other("or") - || v[i - 1] == Token::Other("not")) - { + } else if ip.is_some() && matches!(v[ip.unwrap()], Token::Other("and" | "or" | "not")) { // retain the space after "and", "or" or "not" - } else if (is_in_calc && v[i - 1].is_useless()) - || !is_in_calc - && ((i > 0 - && ((v[i - 1].is_char() - && v[i - 1] != Token::Char(ReservedChar::CloseParenthese)) - || v[i - 1].is_a_media() - || v[i - 1].is_a_license())) - || (i < v.len() - 1 && v[i + 1].is_char())) + } else if is_in_calc && v[ip.unwrap()].is_useless() { + retain = false; + } else if !is_in_calc + && ((ip.is_some() && { + let prev = &v[ip.unwrap()]; + (prev.is_char() && prev != &Token::Char(ReservedChar::CloseParenthese)) + || prev.is_a_media() + || prev.is_a_license() + }) || (i < v.len() - 1 && v[i + 1].is_char())) { - v.remove(i); - continue; + retain = false; } } else if v[i].is_comment() { - v.remove(i); - continue; + retain = false; + } + if retain { + ip = Some(i); } + b.push(retain); i += 1; } + assert_eq!(v.len(), b.len()); + let mut b = b.into_iter(); + v.retain(|_| b.next().unwrap()); v } -- cgit v1.2.3