bendns' repos / helix
Unnamed repository; edit this file 'description' to name the repository.
Diffstat (limited to 'helix-tui/src/buffer.rs')
-rw-r--r--helix-tui/src/buffer.rs57
1 files changed, 57 insertions, 0 deletions
diff --git a/helix-tui/src/buffer.rs b/helix-tui/src/buffer.rs
index d28c32fc..405a0acd 100644
--- a/helix-tui/src/buffer.rs
+++ b/helix-tui/src/buffer.rs
@@ -307,6 +307,63 @@ impl Buffer {
}
/// Print at most the first `width` characters of a string if enough space is available
+ /// until the end of the line.
+ /// If `ellipsis` is true appends a `…` at the end of truncated lines.
+ /// If `truncate_start` is `true`, adds a `…` at the beginning of truncated lines.
+ #[allow(clippy::too_many_arguments)]
+ pub fn set_string_anchored(
+ &mut self,
+ x: u16,
+ y: u16,
+ truncate_start: bool,
+ truncate_end: bool,
+ string: &str,
+ width: usize,
+ style: impl Fn(usize) -> Style, // Map a grapheme's string offset to a style
+ ) -> (u16, u16) {
+ // prevent panic if out of range
+ if !self.in_bounds(x, y) || width == 0 {
+ return (x, y);
+ }
+
+ let max_offset = min(
+ self.area.right() as usize - 1,
+ width.saturating_add(x as usize),
+ );
+ let mut start_index = self.index_of(x, y);
+ let mut end_index = self.index_of(max_offset as u16, y);
+
+ if truncate_end {
+ self.content[end_index].set_symbol("…");
+ end_index -= 1;
+ }
+
+ if truncate_start {
+ self.content[start_index].set_symbol("…");
+ start_index += 1;
+ }
+
+ let graphemes = string.grapheme_indices(true);
+
+ for (byte_offset, s) in graphemes.skip(truncate_start as usize) {
+ if start_index > end_index {
+ break;
+ }
+
+ self.content[start_index].set_symbol(s);
+ self.content[start_index].set_style(style(byte_offset));
+
+ for i in start_index + 1..end_index {
+ self.content[i].reset();
+ }
+
+ start_index += s.width();
+ }
+
+ (x, y)
+ }
+
+ /// Print at most the first `width` characters of a string if enough space is available
/// until the end of the line. If `ellipsis` is true appends a `…` at the end of
/// truncated lines. If `truncate_start` is `true`, truncate the beginning of the string
/// instead of the end.