From e72be529968071abcd5fce1d9a06e8e2e2bbaacf Mon Sep 17 00:00:00 2001
From: mWalrus <hellkvistoskar@protonmail.com>
Date: Wed, 22 Mar 2023 15:38:34 +0100
Subject: [PATCH] Truncate paths in the file picker (#6410)

---
 helix-term/src/ui/menu.rs      |  1 +
 helix-term/src/ui/picker.rs    |  1 +
 helix-tui/src/buffer.rs        | 25 +++++++++++++++++++++++++
 helix-tui/src/widgets/table.rs | 20 ++++++++++++++++----
 4 files changed, 43 insertions(+), 4 deletions(-)

diff --git a/helix-term/src/ui/menu.rs b/helix-term/src/ui/menu.rs
index 30625acee60c..bdad2e408392 100644
--- a/helix-term/src/ui/menu.rs
+++ b/helix-term/src/ui/menu.rs
@@ -347,6 +347,7 @@ impl<T: Item + 'static> Component for Menu<T> {
                 offset: scroll,
                 selected: self.cursor,
             },
+            false,
         );
 
         if let Some(cursor) = self.cursor {
diff --git a/helix-term/src/ui/picker.rs b/helix-term/src/ui/picker.rs
index 3294a2a1d23a..e73088e528fa 100644
--- a/helix-term/src/ui/picker.rs
+++ b/helix-term/src/ui/picker.rs
@@ -885,6 +885,7 @@ impl<T: Item + 'static> Component for Picker<T> {
                 offset: 0,
                 selected: Some(cursor),
             },
+            self.truncate_start,
         );
     }
 
diff --git a/helix-tui/src/buffer.rs b/helix-tui/src/buffer.rs
index b1fd44787f78..2c212b125c3a 100644
--- a/helix-tui/src/buffer.rs
+++ b/helix-tui/src/buffer.rs
@@ -433,6 +433,31 @@ impl Buffer {
         (x_offset as u16, y)
     }
 
+    pub fn set_spans_truncated(&mut self, x: u16, y: u16, spans: &Spans, width: u16) -> (u16, u16) {
+        let mut remaining_width = width;
+        let mut alt_x = x;
+        let (text, styles) =
+            spans
+                .0
+                .iter()
+                .fold((String::new(), vec![]), |(mut s, mut h), span| {
+                    s.push_str(span.content.as_ref());
+                    let mut styles = span
+                        .styled_graphemes(span.style)
+                        .map(|grapheme| grapheme.style)
+                        .collect();
+                    h.append(&mut styles);
+
+                    let w = span.width() as u16;
+                    alt_x = alt_x + w;
+                    remaining_width = remaining_width.saturating_sub(w);
+
+                    (s, h)
+                });
+        self.set_string_truncated(x, y, &text, width.into(), |idx| styles[idx], true, true);
+        (x, y)
+    }
+
     pub fn set_spans(&mut self, x: u16, y: u16, spans: &Spans, width: u16) -> (u16, u16) {
         let mut remaining_width = width;
         let mut x = x;
diff --git a/helix-tui/src/widgets/table.rs b/helix-tui/src/widgets/table.rs
index 400f65e0ad98..97762167e848 100644
--- a/helix-tui/src/widgets/table.rs
+++ b/helix-tui/src/widgets/table.rs
@@ -354,7 +354,13 @@ impl TableState {
 impl<'a> Table<'a> {
     // type State = TableState;
 
-    pub fn render_table(mut self, area: Rect, buf: &mut Buffer, state: &mut TableState) {
+    pub fn render_table(
+        mut self,
+        area: Rect,
+        buf: &mut Buffer,
+        state: &mut TableState,
+        truncate: bool,
+    ) {
         if area.area() == 0 {
             return;
         }
@@ -401,6 +407,7 @@ impl<'a> Table<'a> {
                         width: *width,
                         height: max_header_height,
                     },
+                    truncate,
                 );
                 col += *width + self.column_spacing;
             }
@@ -457,6 +464,7 @@ impl<'a> Table<'a> {
                         width: *width,
                         height: table_row.height,
                     },
+                    truncate,
                 );
                 col += *width + self.column_spacing;
             }
@@ -464,20 +472,24 @@ impl<'a> Table<'a> {
     }
 }
 
-fn render_cell(buf: &mut Buffer, cell: &Cell, area: Rect) {
+fn render_cell(buf: &mut Buffer, cell: &Cell, area: Rect, truncate: bool) {
     buf.set_style(area, cell.style);
     for (i, spans) in cell.content.lines.iter().enumerate() {
         if i as u16 >= area.height {
             break;
         }
-        buf.set_spans(area.x, area.y + i as u16, spans, area.width);
+        if truncate {
+            buf.set_spans_truncated(area.x, area.y + i as u16, spans, area.width);
+        } else {
+            buf.set_spans(area.x, area.y + i as u16, spans, area.width);
+        }
     }
 }
 
 impl<'a> Widget for Table<'a> {
     fn render(self, area: Rect, buf: &mut Buffer) {
         let mut state = TableState::default();
-        Table::render_table(self, area, buf, &mut state);
+        Table::render_table(self, area, buf, &mut state, false);
     }
 }