fix: lead the bottom position indicator with one margin column

TODO.md

@@ -21,7 +21,9 @@
 - [x] add `C` and `D` for deleting line from current cursor position (and entering insert mode: `C`); add `Y` for copying line from current cursor position; add `r` for replacing character at cursor position; add `s` for deleting character at current cursor position and entering insert mode; add `d<count>w` for deleting whole words; add `d<count>b` for deleting backwards (same as `d<count>w` but backwards).
 - [x] diff view: make foreground of etched areas (where no lines exist) the same dimmed color as the normal gutter text
 - [x] copying is pretty slow; optimize performance to reduce latency.
-- [x] enable margins in bar elements (i.e. for top and bottom bars) and give the lsp symbol (next to language) a default margin of 1 column on either side.
+- [x] enable margins in top/bottom bar elements; give the bottom bar's far-right position indicator a default leading margin of 1 column and no trailing margin.
+- [ ] better fuzzy search when searching revisions and bookmarks (or the git alternatives) in before and after picker for diff view.
+- [ ] buffer picker (with search).
 - [ ] pull a pr description and display it in a buffer:
 	- open a selector that allows you to pick a pr from remote
 	- selector should be searchable

docs/configuration.md

@@ -68,8 +68,7 @@ Vamp.configure do |config|
     left: [:mode, :path, :diagnostics, :selections, :count, :pending, :buffer],
     center: [], right: [:language, :lsp, :position],
     mode: { padding: 1, leading_edge: "", trailing_edge: "▓░" },
-    lsp: { margin: 1 },
+    position: { padding: 1, leading_margin: 1, trailing_margin: 0, leading_edge: "░▓", trailing_edge: "" }
-    position: { padding: 1, leading_edge: "░▓", trailing_edge: "" }
   }
   config.bar.bottom = {
     left: [:tabs], center: [], right: [:battery],
@@ -92,7 +91,7 @@ Each segment's `title` is a literal template supporting only `{index}`, `{view}`
 
 `:lsp` displays only ready servers assigned to the focused buffer, in configured stack order joined with ` + `. Disabled, initializing, failed, or unassigned servers do not appear. Names come from the initialization reply's `serverInfo.name`, falling back to the configured executable basename; no arbitrary named label can make an inactive server appear active.
 
-`margin` adds unstyled space outside both edges of a segment, unlike the styled internal `padding`. It accepts integers from `0` through `64`, defaults to `0`, and defaults to `1` for `:lsp` in either bar. For example, `config.bar.bottom = { lsp: { margin: 0 } }` removes LSP's external spacing without changing its padding. Margins count toward anchor placement and collision handling; empty segments consume no margin, and margins yield along with padding and edges when only clipped content fits.
+`margin` adds unstyled space outside both edges of a segment, unlike the styled internal `padding`. `leading_margin` and `trailing_margin` override their respective sides. All accept integers from `0` through `64`. Margins default to zero except the bottom bar's `:position`, which has one leading column and no trailing margin. LSP has no default margins. For example, `config.bar.bottom = { position: { leading_margin: 0 } }` removes position's external spacing without changing its padding. Margins count toward anchor placement and collision handling; empty segments consume no margin, and margins yield along with padding and edges when only clipped content fits.
 
 `padding` adds spaces inside the segment's styling, on both sides of its title, and accepts integers from `0` through `64` (default `1`). `leading_edge` and `trailing_edge` are separate styled glyph strings, not padding; `""` removes an edge. Tabs default to `"░▓"` / `"▓░"` edges; mode has only the trailing `"▓░"` edge, position and battery only the leading `"░▓"` edge, and other segments have none. `first_leading_edge` optionally overrides the first occurrence's leading glyphs: for tabs this is the actual first tab, not the first tab remaining after clipping; other segments have one occurrence. Tabs default this override to `""`, suppressing the first tab's left fade. Unicode widths are measured in terminal cells. Edge strings must be single-line and contain no control characters. Unknown style keys, invalid templates, and wrong types reject configuration.
 

src/chrome.rs

@@ -106,7 +106,7 @@ pub struct ChromeLine {
 pub struct SegmentConfig {
     pub title: String,
     pub padding: usize,
-    pub margin: usize,
+    pub margin: [usize; 2],
     pub leading_edge: String,
     pub trailing_edge: String,
     pub first_leading_edge: Option<String>,
@@ -117,7 +117,7 @@ impl Default for SegmentConfig {
         Self {
             title: String::new(),
             padding: 1,
-            margin: 0,
+            margin: [0; 2],
             leading_edge: String::new(),
             trailing_edge: String::new(),
             first_leading_edge: None,
@@ -148,7 +148,13 @@ impl ChromeLine {
             right: vec!["language".into(), "lsp".into(), "position".into()],
             segments: DEFAULT_BOTTOM_SEGMENTS
                 .iter()
-                .map(|name| ((*name).into(), default_segment(name)))
+                .map(|name| {
+                    let mut segment = default_segment(name);
+                    if *name == "position" {
+                        segment.margin[0] = 1;
+                    }
+                    ((*name).into(), segment)
+                })
                 .collect(),
         }
     }
@@ -169,7 +175,11 @@ impl ChromeLine {
             validate_name(name)?;
         }
         for (name, segment) in &self.segments {
-            for (option, value) in [("padding", segment.padding), ("margin", segment.margin)] {
+            for (option, value) in [
+                ("padding", segment.padding),
+                ("leading_margin", segment.margin[0]),
+                ("trailing_margin", segment.margin[1]),
+            ] {
                 if value > 64 {
                     return Err(format!(
                         "Chrome segment {name:?} {option} must be between 0 and 64"
@@ -202,9 +212,6 @@ impl ChromeLine {
 
 fn default_segment(name: &str) -> SegmentConfig {
     let mut segment = SegmentConfig::default();
-    if name == "lsp" {
-        segment.margin = 1;
-    }
     if matches!(name, "tabs" | "position" | "battery") {
         segment.leading_edge = "░▓".into();
     }
@@ -266,6 +273,8 @@ struct SegmentOptions {
     title: Option<String>,
     padding: Option<usize>,
     margin: Option<usize>,
+    leading_margin: Option<usize>,
+    trailing_margin: Option<usize>,
     leading_edge: Option<String>,
     trailing_edge: Option<String>,
     first_leading_edge: Option<String>,
@@ -313,7 +322,13 @@ fn deserialize_line<'de, D: Deserializer<'de>>(
             segment.padding = padding;
         }
         if let Some(margin) = options.margin {
-            segment.margin = margin;
+            segment.margin = [margin; 2];
+        }
+        if let Some(margin) = options.leading_margin {
+            segment.margin[0] = margin;
+        }
+        if let Some(margin) = options.trailing_margin {
+            segment.margin[1] = margin;
         }
         if let Some(edge) = options.leading_edge {
             segment.leading_edge = edge;

src/ruby_config.rb

@@ -35,7 +35,7 @@ module Vamp
         chrome_name!(name)
         style = chrome_hash!(value).to_h do |option, item|
           case option
-          when "padding", "margin"
+          when "padding", "margin", "leading_margin", "trailing_margin"
             unless item.is_a?(Integer) && item.between?(0, 64)
               raise ArgumentError, "#{option} must be an Integer between 0 and 64"
             end

src/tui.rs

@@ -1244,7 +1244,8 @@ fn chrome_items<'a>(
     for item in &mut items {
         item.width = item.text.width()
             + item.config.padding * 2
-            + item.config.margin * 2
+            + item.config.margin[0]
+            + item.config.margin[1]
             + if item.tab.is_none() || item.accent {
                 item.leading_edge().width() + item.config.trailing_edge.width()
             } else {
@@ -1359,11 +1360,12 @@ fn draw_chrome(frame: &mut Frame, mut groups: [Vec<ChromeItem<'_>>; 3], area: Re
                 const PADDING: &str =
                     "                                                                ";
                 let padding = &PADDING[..item.config.padding];
-                let margin = &PADDING[..item.config.margin];
+                let leading_margin = &PADDING[..item.config.margin[0]];
+                let trailing_margin = &PADDING[..item.config.margin[1]];
                 let edges = item.tab.is_none() || item.accent;
                 let edge = Style::default().fg(Color::Cyan);
                 Line::from(vec![
-                    Span::styled(margin, Style::reset()),
+                    Span::styled(leading_margin, Style::reset()),
                     Span::styled(if edges { item.leading_edge() } else { "" }, edge),
                     Span::styled(padding, style),
                     Span::styled(item.text.as_ref(), style),
@@ -1376,7 +1378,7 @@ fn draw_chrome(frame: &mut Frame, mut groups: [Vec<ChromeItem<'_>>; 3], area: Re
                         },
                         edge,
                     ),
-                    Span::styled(margin, Style::reset()),
+                    Span::styled(trailing_margin, Style::reset()),
                 ])
             };
             let cells = item_width.min(available);
@@ -5975,6 +5977,44 @@ mod tests {
         }
     }
 
+    #[test]
+    fn bottom_position_has_only_a_leading_margin_and_lsp_has_none() {
+        let mut editor = Editor::open(None, vec![]).unwrap();
+        editor.set_lsp_names(vec!["server".into()]);
+        configure_chrome(&mut editor, |top, bottom| {
+            top.left.clear();
+            top.center.clear();
+            top.right = vec!["position".into()];
+            bottom.left.clear();
+            bottom.center.clear();
+            bottom.right = vec!["lsp".into(), "position".into()];
+        });
+        let mut terminal = Terminal::new(ratatui::backend::TestBackend::new(40, 2)).unwrap();
+        terminal
+            .draw(|frame| {
+                for (line, y) in [
+                    (editor.top_bar_config(), 0),
+                    (editor.bottom_bar_config(), 1),
+                ] {
+                    let groups = chrome_groups(&editor, line, &SyntaxCache::new());
+                    let start = 40 - chrome_group_width(&groups[2]) as u16;
+                    if y == 1 {
+                        let gap = start + groups[2][0].width as u16;
+                        draw_chrome(frame, groups, Rect::new(0, y, 40, 1));
+                        assert_eq!(frame.buffer_mut()[(start, y)].bg, Color::Cyan);
+                        assert_eq!(frame.buffer_mut()[(gap, y)].symbol(), " ");
+                        assert_eq!(frame.buffer_mut()[(gap, y)].bg, Color::Reset);
+                        assert_eq!(frame.buffer_mut()[(gap + 1, y)].symbol(), "░");
+                    } else {
+                        draw_chrome(frame, groups, Rect::new(0, y, 40, 1));
+                        assert_eq!(frame.buffer_mut()[(start, y)].symbol(), "░");
+                    }
+                    assert_eq!(frame.buffer_mut()[(39, y)].bg, Color::Cyan);
+                }
+            })
+            .unwrap();
+    }
+
     #[test]
     fn bar_margins_surround_styling_and_keep_anchors_and_narrow_content() {
         let directory = Directory::new();
@@ -5983,7 +6023,7 @@ mod tests {
             r#"
 Vamp.configure do |config|
   options = {left: [:badge], center: [:lsp], right: [:badge],
-    badge: {padding: 0, margin: 2, leading_edge: "<", trailing_edge: ">"}, lsp: {padding: 0}}
+    badge: {padding: 0, margin: 2, leading_edge: "<", trailing_edge: ">"}, lsp: {padding: 0, margin: 1}}
   config.bar.top = options
   config.bar.bottom = options
 end
@@ -6036,7 +6076,7 @@ end
                 line.center.clear();
                 line.right.clear();
                 let lsp = line.segments.get_mut("lsp").unwrap();
-                lsp.margin = 64;
+                lsp.margin = [64; 2];
                 lsp.padding = 64;
             }
         });
@@ -6749,7 +6789,7 @@ end
                         SegmentConfig {
                             title: String::new(),
                             padding: 0,
-                            margin: 0,
+                            margin: [0; 2],
                             leading_edge: String::new(),
                             trailing_edge: String::new(),
                             first_leading_edge: None,
@@ -6913,7 +6953,7 @@ end
                 SegmentConfig {
                     title: "{index}".into(),
                     padding: 2,
-                    margin: 0,
+                    margin: [0; 2],
                     leading_edge: "界▌".into(),
                     trailing_edge: "▐界".into(),
                     first_leading_edge: Some("<".into()),
@@ -6924,7 +6964,7 @@ end
                 SegmentConfig {
                     title: String::new(),
                     padding: 2,
-                    margin: 0,
+                    margin: [0; 2],
                     leading_edge: "界(".into(),
                     trailing_edge: ")界".into(),
                     first_leading_edge: None,
@@ -7021,7 +7061,7 @@ end
                 SegmentConfig {
                     title: "Not visible without a value".into(),
                     padding: 64,
-                    margin: 0,
+                    margin: [0; 2],
                     leading_edge: "░▒▓".into(),
                     trailing_edge: "▓▒░".into(),
                     first_leading_edge: None,