bendns' repos / helix
Unnamed repository; edit this file 'description' to name the repository.
Diffstat (limited to 'helix-core/src/indent.rs')
-rw-r--r--helix-core/src/indent.rs34
1 files changed, 32 insertions, 2 deletions
diff --git a/helix-core/src/indent.rs b/helix-core/src/indent.rs
index 3faae53e..108c18d0 100644
--- a/helix-core/src/indent.rs
+++ b/helix-core/src/indent.rs
@@ -1,4 +1,4 @@
-use std::{borrow::Cow, collections::HashMap};
+use std::{borrow::Cow, collections::HashMap, iter};
use helix_stdx::rope::RopeSliceExt;
use tree_sitter::{Query, QueryCursor, QueryPredicateArg};
@@ -8,7 +8,7 @@ use crate::{
graphemes::{grapheme_width, tab_width_at},
syntax::{IndentationHeuristic, LanguageConfiguration, RopeProvider, Syntax},
tree_sitter::Node,
- Position, Rope, RopeGraphemes, RopeSlice,
+ Position, Rope, RopeGraphemes, RopeSlice, Tendril,
};
/// Enum representing indentation style.
@@ -210,6 +210,36 @@ fn whitespace_with_same_width(text: RopeSlice) -> String {
s
}
+/// normalizes indentation to tabs/spaces based on user configuration
+/// This function does not change the actual indentation width, just the character
+/// composition.
+pub fn normalize_indentation(
+ prefix: RopeSlice<'_>,
+ line: RopeSlice<'_>,
+ dst: &mut Tendril,
+ indent_style: IndentStyle,
+ tab_width: usize,
+) -> usize {
+ #[allow(deprecated)]
+ let off = crate::visual_coords_at_pos(prefix, prefix.len_chars(), tab_width).col;
+ let mut len = 0;
+ let mut original_len = 0;
+ for ch in line.chars() {
+ match ch {
+ '\t' => len += tab_width_at(len + off, tab_width as u16),
+ ' ' => len += 1,
+ _ => break,
+ }
+ original_len += 1;
+ }
+ if indent_style == IndentStyle::Tabs {
+ dst.extend(iter::repeat('\t').take(len / tab_width));
+ len %= tab_width;
+ }
+ dst.extend(iter::repeat(' ').take(len));
+ original_len
+}
+
fn add_indent_level(
mut base_indent: String,
added_indent_level: isize,