feat: add Git and Jujutsu gutter indicators

src/editor.rs

@@ -1511,6 +1511,12 @@ impl FileStamp {
     }
 }
 
+struct GutterChanges {
+    revision: u64,
+    path: PathBuf,
+    lines: Vec<Option<crate::gutter::Change>>,
+}
+
 struct Buffer {
     id: usize,
     diff_snapshot: Option<(u64, usize, Focus)>,
@@ -1524,6 +1530,7 @@ struct Buffer {
     save_revision: u64,
     diagnostics: BTreeMap<String, AnnotationSet>,
     semantic_tokens: Option<Arc<[SemanticToken]>>,
+    gutter_changes: Option<GutterChanges>,
     view: ViewState,
     path: Option<PathBuf>,
     identity: Option<PathBuf>,
@@ -1580,6 +1587,7 @@ impl Buffer {
             save_revision: 0,
             diagnostics: BTreeMap::new(),
             semantic_tokens: None,
+            gutter_changes: None,
             view: ViewState {
                 targets: vec![Target::caret(Cursor::default())],
                 ..ViewState::empty()
@@ -1755,6 +1763,7 @@ pub struct Editor {
     battery_charge: Option<u8>,
     battery_label: String,
     git_blame: bool,
+    gutter_style: crate::gutter::GutterStyle,
     line_blame: Option<(BlameSource, Arc<crate::blame::LineBlame>, String)>,
     lsp_names: Vec<String>,
     lsp_label: String,
@@ -1855,6 +1864,7 @@ impl Editor {
             battery_charge: None,
             battery_label: String::new(),
             git_blame: true,
+            gutter_style: crate::gutter::GutterStyle::default(),
             line_blame: None,
             lsp_names: Vec::new(),
             lsp_label: String::new(),
@@ -4884,6 +4894,68 @@ impl Editor {
     pub fn battery_label(&self) -> &str {
         &self.battery_label
     }
+    pub(crate) fn gutter_style(&self) -> crate::gutter::GutterStyle {
+        self.gutter_style
+    }
+
+    pub(crate) fn set_gutter_style(&mut self, style: crate::gutter::GutterStyle) {
+        self.gutter_style = style;
+    }
+
+    pub(crate) fn gutter_change(&self, row: usize) -> Option<crate::gutter::Change> {
+        if self.active.diff_snapshot.is_some() || self.active.reload_error.is_some() {
+            return None;
+        }
+        let changes = self.active.gutter_changes.as_ref()?;
+        if changes.revision != self.active.text_revision
+            || Some(changes.path.as_path()) != self.path()
+        {
+            return None;
+        }
+        changes.lines.get(row).copied().flatten()
+    }
+
+    pub(crate) fn set_gutter_changes(
+        &mut self,
+        buffer: usize,
+        revision: u64,
+        path: &Path,
+        changes: Vec<Option<crate::gutter::Change>>,
+    ) -> bool {
+        let buffer = if buffer == self.active.id {
+            &mut self.active
+        } else if let Some(buffer) = self.parked.get_mut(&buffer) {
+            buffer
+        } else {
+            return false;
+        };
+        if buffer.diff_snapshot.is_some()
+            || buffer.text_revision != revision
+            || buffer.path.as_deref() != Some(path)
+            || changes.len() > buffer.lines.len()
+        {
+            return false;
+        }
+        if buffer
+            .gutter_changes
+            .as_ref()
+            .is_some_and(|old| old.revision == revision && old.path == path && old.lines == changes)
+        {
+            return false;
+        }
+        let visible = changes.iter().any(Option::is_some)
+            || buffer
+                .gutter_changes
+                .as_ref()
+                .is_some_and(|old| old.lines.iter().any(Option::is_some));
+        buffer.gutter_changes = Some(GutterChanges {
+            revision,
+            path: path.to_path_buf(),
+            lines: changes,
+        });
+        visible
+    }
+
     pub fn git_blame(&self) -> bool {
         self.git_blame
     }
@@ -10305,7 +10377,7 @@ fn validate_text(text: &str) -> Result<(), String> {
     }
 }
 
-fn normalize_newlines(text: &str) -> Cow<'_, str> {
+pub(crate) fn normalize_newlines(text: &str) -> Cow<'_, str> {
     if !text.contains('\r') {
         return Cow::Borrowed(text);
     }