From 0ee3ccac920d3871049b54f2235cb033d3de0499 Mon Sep 17 00:00:00 2001
From: kraem <ebrin.ronnie@protonmail.com>
Date: Wed, 15 Sep 2021 11:26:01 +0200
Subject: [PATCH] helix-term: enable smartcase search by default

---
 helix-term/src/commands.rs | 5 +++--
 helix-term/src/ui/mod.rs   | 5 ++++-
 helix-view/src/editor.rs   | 3 +++
 3 files changed, 10 insertions(+), 3 deletions(-)

diff --git a/helix-term/src/commands.rs b/helix-term/src/commands.rs
index c5409494a8598..e8baa1e50e439 100644
--- a/helix-term/src/commands.rs
+++ b/helix-term/src/commands.rs
@@ -5,7 +5,7 @@ use helix_core::{
     match_brackets,
     movement::{self, Direction},
     object, pos_at_coords,
-    regex::{self, Regex},
+    regex::{self, Regex, RegexBuilder},
     register::Register,
     search, selection, surround, textobject, LineEnding, Position, Range, Rope, RopeGraphemes,
     RopeSlice, Selection, SmallVec, Tendril, Transaction,
@@ -1154,7 +1154,8 @@ fn search_next_impl(cx: &mut Context, extend: bool) {
     if let Some(query) = registers.read('/') {
         let query = query.last().unwrap();
         let contents = doc.text().slice(..).to_string();
-        let regex = Regex::new(query).unwrap();
+        let case_insensitive = if cx.editor.config.smartcase { query.to_owned() == query.to_lowercase() } else { false };
+        let regex = RegexBuilder::new(query).case_insensitive(case_insensitive).build().expect("unable to build regex");
         search_impl(doc, view, &contents, &regex, extend);
     }
 }
diff --git a/helix-term/src/ui/mod.rs b/helix-term/src/ui/mod.rs
index 07eef3525d879..ecbbbe628e5ba 100644
--- a/helix-term/src/ui/mod.rs
+++ b/helix-term/src/ui/mod.rs
@@ -20,6 +20,7 @@ pub use spinner::{ProgressSpinners, Spinner};
 pub use text::Text;
 
 use helix_core::regex::Regex;
+use helix_core::regex::RegexBuilder;
 use helix_view::{Document, Editor, View};
 
 use std::path::PathBuf;
@@ -53,7 +54,9 @@ pub fn regex_prompt(
                         return;
                     }
 
-                    match Regex::new(input) {
+                    let case_insensitive = if cx.editor.config.smartcase { input == input.to_lowercase() } else { false };
+
+                    match RegexBuilder::new(input).case_insensitive(case_insensitive).build() {
                         Ok(regex) => {
                             let (view, doc) = current!(cx.editor);
 
diff --git a/helix-view/src/editor.rs b/helix-view/src/editor.rs
index a3d0d0323fcc4..849bfe7d5221e 100644
--- a/helix-view/src/editor.rs
+++ b/helix-view/src/editor.rs
@@ -39,6 +39,8 @@ pub struct Config {
     pub line_number: LineNumber,
     /// Middle click paste support. Defaults to true
     pub middle_click_paste: bool,
+    /// Smartcase: Case insensitive searching unless pattern has upper case character. Defaults to true.
+    pub smartcase: bool,
 }
 
 #[derive(Debug, Clone, PartialEq, Eq, Deserialize)]
@@ -64,6 +66,7 @@ impl Default for Config {
             },
             line_number: LineNumber::Absolute,
             middle_click_paste: true,
+            smartcase: true,
         }
     }
 }