fix: truncated message with emoji

Cargo.toml

@@ -15,7 +15,6 @@ pretty_assertions = "1.4.1"
 temp-dir = "0.1.16"
 criterion = "0.8.1"
 insta = "1.46.0"
-unicode-width = "0.2.0"
 temp-env = "0.3.6"
 stdext = "0.3.3"
 url = "2.5.7"
@@ -71,6 +70,7 @@ tree-sitter-elixir = "=0.3.4"
 regex = "1.12.2"
 strip-ansi-escapes = "0.2.1"
 unicode-segmentation = "1.12.0"
+unicode-width = "0.2.0"
 cached = "0.56.0"
 strum = { version = "0.26.3", features = ["strum_macros"] }
 tinyvec = "1.10.0"

src/screen/mod.rs

@@ -4,6 +4,7 @@ use crate::ui::{UiTree, layout_span};
 use crate::{item_data::ItemData, ui};
 use ratatui::{layout::Size, style::Style, text::Line};
 use unicode_segmentation::UnicodeSegmentation;
+use unicode_width::UnicodeWidthStr;
 
 use crate::{Res, config::Config, items::hash};
 
@@ -473,26 +474,24 @@ pub(crate) fn layout_screen<'a>(
                 line.display.spans.into_iter().for_each(|span| {
                     let style = bg.patch(line.display.style).patch(span.style);
 
-                    let span_width = span.content.graphemes(true).count();
+                    let span_width = UnicodeWidthStr::width(span.content.as_ref());
 
                     if line_end + span_width >= size.width as usize {
-                        // Truncate the span and insert an ellipsis to indicate overflow
-                        let overflow = line_end + span_width - size.width as usize;
+                        let budget = size.width as usize;
+                        let mut accumulated = 0;
+                        let mut truncated = String::new();
+                        for grapheme in span.content.graphemes(true) {
+                            let w = UnicodeWidthStr::width(grapheme);
+                            if line_end + accumulated + w + 1 > budget {
+                                break;
+                            }
+                            accumulated += w;
+                            truncated.push_str(grapheme);
+                        }
                         line_end = size.width as usize;
-                        ui::layout_span(
-                            layout,
-                            (
-                                span.content
-                                    .graphemes(true)
-                                    .take(span_width.saturating_sub(overflow + 1))
-                                    .collect::<String>()
-                                    .into(),
-                                style,
-                            ),
-                        );
+                        ui::layout_span(layout, (truncated.into(), style));
                         layout_span(layout, ("…".into(), bg));
                     } else {
-                        // Insert the span as normal
                         line_end += span_width;
                         ui::layout_span(layout, (span.content, style));
                     }

src/ui.rs

@@ -10,6 +10,7 @@ use ratatui::Frame;
 use ratatui::prelude::*;
 use tui_prompts::State as _;
 use unicode_segmentation::UnicodeSegmentation;
+use unicode_width::UnicodeWidthStr;
 
 pub(crate) mod layout;
 mod menu;
@@ -127,7 +128,7 @@ pub(crate) fn layout_line<'a>(layout: &mut UiTree<'a>, line: Line<'a>) {
 }
 
 pub(crate) fn layout_span<'a>(layout: &mut UiTree<'a>, span: (Cow<'a, str>, Style)) {
-    let width = span.0.graphemes(true).count() as u16;
+    let width = UnicodeWidthStr::width(span.0.as_ref()) as u16;
     layout.leaf_with_size(span, [width, 1]);
 }