From 76175dbd6da4f57118eb52477f3336c6dcab5692 Mon Sep 17 00:00:00 2001
From: Gokul Soumya <gokulps15@gmail.com>
Date: Sun, 3 Apr 2022 22:00:26 +0530
Subject: [PATCH] Support m in surround delete and replace

---
 helix-core/src/surround.rs | 11 ++++++++---
 helix-term/src/commands.rs | 14 ++++++++------
 2 files changed, 16 insertions(+), 9 deletions(-)

diff --git a/helix-core/src/surround.rs b/helix-core/src/surround.rs
index 4cba81bff..6f1fdb95d 100644
--- a/helix-core/src/surround.rs
+++ b/helix-core/src/surround.rs
@@ -212,17 +212,22 @@ fn find_nth_close_pair(
 /// Find position of surround characters around every cursor. Returns None
 /// if any positions overlap. Note that the positions are in a flat Vec.
 /// Use get_surround_pos().chunks(2) to get matching pairs of surround positions.
-/// `ch` can be either closing or opening pair.
+/// `ch` can be either closing or opening pair. If `ch` is None, surround pairs
+/// are automatically detected around each cursor (note that this may result
+/// in them selecting different surround characters for each selection).
 pub fn get_surround_pos(
     text: RopeSlice,
     selection: &Selection,
-    ch: char,
+    ch: Option<char>,
     skip: usize,
 ) -> Result<Vec<usize>> {
     let mut change_pos = Vec::new();
 
     for &range in selection {
-        let (open_pos, close_pos) = find_nth_pairs_pos(text, ch, range, skip)?;
+        let (open_pos, close_pos) = match ch {
+            Some(ch) => find_nth_pairs_pos(text, ch, range, skip)?,
+            None => find_nth_closest_pairs_pos(text, range, skip)?,
+        };
         if change_pos.contains(&open_pos) || change_pos.contains(&close_pos) {
             return Err(Error::CursorOverlap);
         }
diff --git a/helix-term/src/commands.rs b/helix-term/src/commands.rs
index 75c84b748..54dcc98fc 100644
--- a/helix-term/src/commands.rs
+++ b/helix-term/src/commands.rs
@@ -4111,15 +4111,16 @@ fn surround_add(cx: &mut Context) {
 fn surround_replace(cx: &mut Context) {
     let count = cx.count();
     cx.on_next_key(move |cx, event| {
-        let from = match event.char() {
-            Some(from) => from,
+        let surround_ch = match event.char() {
+            Some('m') => None, // m selects the closest surround pair
+            Some(ch) => Some(ch),
             None => return,
         };
         let (view, doc) = current!(cx.editor);
         let text = doc.text().slice(..);
         let selection = doc.selection(view.id);
 
-        let change_pos = match surround::get_surround_pos(text, selection, from, count) {
+        let change_pos = match surround::get_surround_pos(text, selection, surround_ch, count) {
             Ok(c) => c,
             Err(err) => {
                 cx.editor.set_error(err.to_string());
@@ -4150,15 +4151,16 @@ fn surround_replace(cx: &mut Context) {
 fn surround_delete(cx: &mut Context) {
     let count = cx.count();
     cx.on_next_key(move |cx, event| {
-        let ch = match event.char() {
-            Some(ch) => ch,
+        let surround_ch = match event.char() {
+            Some('m') => None, // m selects the closest surround pair
+            Some(ch) => Some(ch),
             None => return,
         };
         let (view, doc) = current!(cx.editor);
         let text = doc.text().slice(..);
         let selection = doc.selection(view.id);
 
-        let change_pos = match surround::get_surround_pos(text, selection, ch, count) {
+        let change_pos = match surround::get_surround_pos(text, selection, surround_ch, count) {
             Ok(c) => c,
             Err(err) => {
                 cx.editor.set_error(err.to_string());