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Switch subscript and superscript to using bracket depth from OrgSource instead of from the context.

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This is for the same reasons as footnote references.
This commit is contained in:
Tom Alexander 2023-08-28 02:37:01 -04:00
parent a46b358549
commit 4c2037ec44
Signed by: talexander
GPG Key ID: D3A179C9A53C0EDE
2 changed files with 25 additions and 68 deletions
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18
src/parser/parser_context.rs
View File

@ -149,18 +149,6 @@ pub enum ContextElement<'r, 's> {
/// unbalanced brackets can be detected in the middle of an
/// object.
InlineSourceBlockBracket(InlineSourceBlockBracket<'s>),
/// Stores the current bracket or parenthesis depth inside a
/// superscript or superscript.
///
/// Inside the braces of a subscript or superscript there must be
/// balanced braces {}, so this stores the amount of opening
/// braces subtracted by the amount of closing braces within the
/// definition must equal zero.
///
/// A reference to the position in the string is also included so
/// unbalanced braces can be detected in the middle of an object.
SubscriptSuperscriptBrace(SubscriptSuperscriptBrace<'s>),
}
pub struct ExitMatcherNode<'r> {
@ -180,12 +168,6 @@ pub struct InlineSourceBlockBracket<'s> {
pub depth: usize,
}
#[derive(Debug)]
pub struct SubscriptSuperscriptBrace<'s> {
pub position: OrgSource<'s>,
pub depth: usize,
}
impl<'r> std::fmt::Debug for ExitMatcherNode<'r> {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
let mut formatter = f.debug_struct("ExitMatcherNode");

69
src/parser/subscript_and_superscript.rs
View File

@ -21,7 +21,6 @@ use crate::parser::exiting::ExitClass;
use crate::parser::object_parser::standard_set_object;
use crate::parser::parser_context::ContextElement;
use crate::parser::parser_context::ExitMatcherNode;
use crate::parser::parser_context::SubscriptSuperscriptBrace;
use crate::parser::parser_with_context::parser_with_context;
use crate::parser::util::exit_matcher_parser;
use crate::parser::util::get_consumed;
@ -154,16 +153,11 @@ fn script_with_braces<'r, 's>(
input: OrgSource<'s>,
) -> Res<OrgSource<'s>, Vec<Object<'s>>> {
let (remaining, _) = tag("{")(input)?;
let parser_context = context
.with_additional_node(ContextElement::SubscriptSuperscriptBrace(
SubscriptSuperscriptBrace {
position: remaining.into(),
depth: 0,
},
))
.with_additional_node(ContextElement::ExitMatcherNode(ExitMatcherNode {
let exit_with_depth = script_with_braces_end(remaining.get_brace_depth());
let parser_context =
context.with_additional_node(ContextElement::ExitMatcherNode(ExitMatcherNode {
class: ExitClass::Gamma,
exit_matcher: &script_with_braces_end,
exit_matcher: &exit_with_depth,
}));
let (remaining, (children, _exit_contents)) = many_till(
@ -175,49 +169,30 @@ fn script_with_braces<'r, 's>(
Ok((remaining, children))
}
fn script_with_braces_end(
starting_brace_depth: isize,
) -> impl for<'r, 's> Fn(Context<'r, 's>, OrgSource<'s>) -> Res<OrgSource<'s>, OrgSource<'s>> {
move |context: Context, input: OrgSource<'_>| {
_script_with_braces_end(context, input, starting_brace_depth)
}
}
#[cfg_attr(feature = "tracing", tracing::instrument(ret, level = "debug"))]
fn script_with_braces_end<'r, 's>(
context: Context<'r, 's>,
fn _script_with_braces_end<'r, 's>(
_context: Context<'r, 's>,
input: OrgSource<'s>,
starting_brace_depth: isize,
) -> Res<OrgSource<'s>, OrgSource<'s>> {
let context_depth = get_bracket_depth(context)
.expect("This function should only be called from inside a subscript or superscript.");
let text_since_context_entry = get_consumed(context_depth.position, input);
let mut current_depth = context_depth.depth;
for c in Into::<&str>::into(text_since_context_entry).chars() {
match c {
'{' => {
current_depth += 1;
}
'}' if current_depth == 0 => {
panic!("Exceeded subscript or superscript brace depth.")
}
'}' if current_depth > 0 => {
current_depth -= 1;
}
_ => {}
}
}
if current_depth == 0 {
let close_bracket = tag::<&str, OrgSource<'_>, CustomError<OrgSource<'_>>>("}")(input);
if close_bracket.is_ok() {
return close_bracket;
}
}
let current_depth = input.get_brace_depth() - starting_brace_depth;
if current_depth > 0 {
// Its impossible for the next character to end the subscript or superscript if we're any amount of braces deep
return Err(nom::Err::Error(CustomError::MyError(MyError(
"Not a valid end for subscript or superscript.".into(),
))));
}
#[cfg_attr(feature = "tracing", tracing::instrument(ret, level = "debug"))]
fn get_bracket_depth<'r, 's>(
context: Context<'r, 's>,
) -> Option<&'r SubscriptSuperscriptBrace<'s>> {
for node in context.iter() {
match node.get_data() {
ContextElement::SubscriptSuperscriptBrace(depth) => return Some(depth),
_ => {}
if current_depth < 0 {
// This shouldn't be possible because if depth is 0 then a closing brace should end the subscript or superscript.
unreachable!("Exceeded subscript or superscript brace depth.")
}
}
None
tag("}")(input)
}