From f150af7341600af7d779a153c9455950c0bb2fe9 Mon Sep 17 00:00:00 2001
From: PoiScript <poiscript@gmail.com>
Date: Tue, 11 Jun 2024 15:18:58 +0800
Subject: [PATCH] fix: verify use_sub_superscript

---
 src/lib.rs                          |  2 +-
 src/syntax/object.rs                | 20 ++++++--------------
 src/syntax/subscript_superscript.rs |  6 +++++-
 3 files changed, 12 insertions(+), 16 deletions(-)

diff --git a/src/lib.rs b/src/lib.rs
index 208ffbf..c1fd96a 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,7 +1,7 @@
 #![doc = include_str!("../README.md")]
 
 pub mod ast;
-mod config;
+pub mod config;
 mod entities;
 pub mod export;
 mod org;
diff --git a/src/syntax/object.rs b/src/syntax/object.rs
index 5cc3947..4bacba1 100644
--- a/src/syntax/object.rs
+++ b/src/syntax/object.rs
@@ -128,16 +128,8 @@ pub fn minimal_object_nodes(input: Input) -> Vec<GreenElement> {
             b'~' if emphasis::verify_pre(pre.s) => code_node(i),
             b'$' => latex_fragment_node(i),
             b'\\' => entity_node(i).or_else(|_| latex_fragment_node(i)),
-            b'^' if !input.c.use_sub_superscript.is_nil()
-                && subscript_superscript::verify_pre(pre.s) =>
-            {
-                superscript_node(i)
-            }
-            b'_' if !input.c.use_sub_superscript.is_nil()
-                && subscript_superscript::verify_pre(pre.s) =>
-            {
-                subscript_node(i)
-            }
+            b'^' if subscript_superscript::verify_pre(&pre) => superscript_node(i),
+            b'_' if subscript_superscript::verify_pre(&pre) => subscript_node(i),
             _ => Err(nom::Err::Error(())),
         },
         input,
@@ -199,8 +191,8 @@ pub fn standard_object_nodes(input: Input) -> Vec<GreenElement> {
             b'$' => latex_fragment_node(i),
             b'\\' if !pre.s.ends_with('\\') && i.as_bytes()[1] == b'\\' => line_break_node(i),
             b'\\' => entity_node(i).or_else(|_| latex_fragment_node(i)),
-            b'^' if subscript_superscript::verify_pre(pre.s) => superscript_node(i),
-            b'_' if subscript_superscript::verify_pre(pre.s) => subscript_node(i),
+            b'^' if subscript_superscript::verify_pre(&pre) => superscript_node(i),
+            b'_' if subscript_superscript::verify_pre(&pre) => subscript_node(i),
             _ => Err(nom::Err::Error(())),
         },
         input,
@@ -224,8 +216,8 @@ pub fn link_description_object_nodes(input: Input) -> Vec<GreenElement> {
             b'~' if emphasis::verify_pre(pre.s) => code_node(i),
             b'$' => latex_fragment_node(i),
             b'\\' => entity_node(i).or_else(|_| latex_fragment_node(i)),
-            b'^' if subscript_superscript::verify_pre(pre.s) => superscript_node(i),
-            b'_' if subscript_superscript::verify_pre(pre.s) => subscript_node(i),
+            b'^' if subscript_superscript::verify_pre(&pre) => superscript_node(i),
+            b'_' if subscript_superscript::verify_pre(&pre) => subscript_node(i),
             _ => Err(nom::Err::Error(())),
         },
         input,
diff --git a/src/syntax/subscript_superscript.rs b/src/syntax/subscript_superscript.rs
index ce511a1..831ff22 100644
--- a/src/syntax/subscript_superscript.rs
+++ b/src/syntax/subscript_superscript.rs
@@ -105,7 +105,11 @@ fn balanced_brackets(input: Input) -> IResult<Input, Input, ()> {
     Err(nom::Err::Error(()))
 }
 
-pub fn verify_pre(s: &str) -> bool {
+pub fn verify_pre(i: &Input) -> bool {
+    if i.c.use_sub_superscript.is_nil() {
+        return false;
+    }
+    let s = i.s;
     if s.is_empty() {
         return false;
     }