add "goto first/next workspace diagnostic" commands

Adds
- goto_first_diag_workspace
- goto_first_error_workspace
- goto_first_warning_workspace
- goto_next_diag_workspace
- goto_next_error_workspace
- goto_next_warning_workspace

helix-core/src/diagnostic.rs

@@ -3,6 +3,8 @@ use std::fmt;
 
 use serde::{Deserialize, Serialize};
 
+use crate::Selection;
+
 /// Describes the severity level of a [`Diagnostic`].
 #[derive(Debug, Clone, Copy, Eq, PartialEq, PartialOrd, Ord, Serialize, Deserialize)]
 #[serde(rename_all = "lowercase")]
@@ -62,6 +64,18 @@ pub struct Diagnostic {
     pub data: Option<serde_json::Value>,
 }
 
+impl Diagnostic {
+    /// Returns a single selection spanning the range of the diagnostic.
+    pub fn single_selection(&self) -> Selection {
+        Selection::single(self.range.start, self.range.end)
+    }
+
+    /// Returns a single reversed selection spanning the range of the diagnostic.
+    pub fn single_selection_rev(&self) -> Selection {
+        Selection::single(self.range.end, self.range.start)
+    }
+}
+
 // TODO turn this into an enum + feature flag when lsp becomes optional
 pub type DiagnosticProvider = LanguageServerId;
 

helix-term/src/commands.rs

@@ -416,6 +416,12 @@ impl MappableCommand {
         goto_last_diag, "Goto last diagnostic",
         goto_next_diag, "Goto next diagnostic",
         goto_prev_diag, "Goto previous diagnostic",
+        goto_first_diag_workspace, "Goto first diagnostic in workspace",
+        goto_first_error_workspace, "Goto first Error diagnostic in workspace",
+        goto_first_warning_workspace, "Goto first Warning diagnostic in workspace",
+        goto_next_diag_workspace, "Goto next diagnostic in workspace",
+        goto_next_error_workspace, "Goto next Error diagnostic in workspace",
+        goto_next_warning_workspace, "Goto next Warning diagnostic in workspace",
         goto_next_change, "Goto next change",
         goto_prev_change, "Goto previous change",
         goto_first_change, "Goto first change",
@@ -2846,13 +2852,7 @@ fn flip_selections(cx: &mut Context) {
 
 fn ensure_selections_forward(cx: &mut Context) {
     let (view, doc) = current!(cx.editor);
-
-    let selection = doc
-        .selection(view.id)
-        .clone()
-        .transform(|r| r.with_direction(Direction::Forward));
-
-    doc.set_selection(view.id, selection);
+    helix_view::ensure_selections_forward(view, doc);
 }
 
 fn enter_insert_mode(cx: &mut Context) {
@@ -3714,6 +3714,54 @@ fn goto_prev_diag(cx: &mut Context) {
     cx.editor.apply_motion(motion)
 }
 
+fn goto_next_diag_workspace(cx: &mut Context) {
+    goto_next_diag_workspace_impl(cx, None)
+}
+
+fn goto_next_error_workspace(cx: &mut Context) {
+    goto_next_diag_workspace_impl(cx, Some(helix_core::diagnostic::Severity::Error))
+}
+
+fn goto_next_warning_workspace(cx: &mut Context) {
+    goto_next_diag_workspace_impl(cx, Some(helix_core::diagnostic::Severity::Warning))
+}
+
+fn goto_next_diag_workspace_impl(
+    cx: &mut Context,
+    severity_filter: Option<helix_core::diagnostic::Severity>,
+) {
+    let diag = helix_view::next_diagnostic_in_workspace(&cx.editor, severity_filter);
+
+    // wrap around
+    let diag =
+        diag.or_else(|| helix_view::first_diagnostic_in_workspace(&cx.editor, severity_filter));
+
+    if let Some(diag) = diag {
+        lsp::jump_to_diagnostic(cx, diag.into_owned());
+    }
+}
+
+fn goto_first_diag_workspace(cx: &mut Context) {
+    goto_first_diag_workspace_impl(cx, None)
+}
+
+fn goto_first_error_workspace(cx: &mut Context) {
+    goto_first_diag_workspace_impl(cx, Some(helix_core::diagnostic::Severity::Error))
+}
+
+fn goto_first_warning_workspace(cx: &mut Context) {
+    goto_first_diag_workspace_impl(cx, Some(helix_core::diagnostic::Severity::Warning))
+}
+
+fn goto_first_diag_workspace_impl(
+    cx: &mut Context,
+    severity_filter: Option<helix_core::diagnostic::Severity>,
+) {
+    if let Some(diag) = helix_view::first_diagnostic_in_workspace(&cx.editor, severity_filter) {
+        lsp::jump_to_diagnostic(cx, diag.into_owned());
+    }
+}
+
 fn goto_first_change(cx: &mut Context) {
     goto_first_change_impl(cx, false);
 }

helix-term/src/commands/lsp.rs

@@ -127,7 +127,7 @@ fn jump_to_location(
     jump_to_position(editor, path, location.range, offset_encoding, action);
 }
 
-fn jump_to_position(
+pub fn jump_to_position(
     editor: &mut Editor,
     path: &Path,
     range: lsp::Range,
@@ -159,6 +159,19 @@ fn jump_to_position(
     }
 }
 
+pub fn jump_to_diagnostic(cx: &mut Context, diagnostic: helix_view::WorkspaceDiagnostic<'static>) {
+    let path = diagnostic.path;
+    let range = diagnostic.diagnostic.range;
+    let offset_encoding = diagnostic.offset_encoding;
+
+    let motion = move |editor: &mut Editor| {
+        jump_to_position(editor, &path, range, offset_encoding, Action::Replace);
+        let (view, doc) = current!(editor);
+        helix_view::ensure_selections_forward(view, doc);
+    };
+    cx.editor.apply_motion(motion);
+}
+
 fn display_symbol_kind(kind: lsp::SymbolKind) -> &'static str {
     match kind {
         lsp::SymbolKind::FILE => "file",

helix-view/src/document.rs

@@ -1895,6 +1895,22 @@ impl Document {
         )
     }
 
+    pub fn lsp_severity_to_severity(
+        severity: lsp::DiagnosticSeverity,
+    ) -> Option<helix_core::diagnostic::Severity> {
+        use helix_core::diagnostic::Severity::*;
+        match severity {
+            lsp::DiagnosticSeverity::ERROR => Some(Error),
+            lsp::DiagnosticSeverity::WARNING => Some(Warning),
+            lsp::DiagnosticSeverity::INFORMATION => Some(Info),
+            lsp::DiagnosticSeverity::HINT => Some(Hint),
+            severity => {
+                log::error!("unrecognized diagnostic severity: {:?}", severity);
+                None
+            }
+        }
+    }
+
     pub fn lsp_diagnostic_to_diagnostic(
         text: &Rope,
         language_config: Option<&LanguageConfiguration>,
@@ -1902,7 +1918,7 @@ impl Document {
         language_server_id: LanguageServerId,
         offset_encoding: helix_lsp::OffsetEncoding,
     ) -> Option<Diagnostic> {
-        use helix_core::diagnostic::{Range, Severity::*};
+        use helix_core::diagnostic::Range;
 
         // TODO: convert inside server
         let start =
@@ -1920,16 +1936,7 @@ impl Document {
             return None;
         };
 
-        let severity = diagnostic.severity.and_then(|severity| match severity {
-            lsp::DiagnosticSeverity::ERROR => Some(Error),
-            lsp::DiagnosticSeverity::WARNING => Some(Warning),
-            lsp::DiagnosticSeverity::INFORMATION => Some(Info),
-            lsp::DiagnosticSeverity::HINT => Some(Hint),
-            severity => {
-                log::error!("unrecognized diagnostic severity: {:?}", severity);
-                None
-            }
-        });
+        let severity = diagnostic.severity.and_then(Self::lsp_severity_to_severity);
 
         if let Some(lang_conf) = language_config {
             if let Some(severity) = severity {

helix-view/src/lib.rs

@@ -18,7 +18,7 @@ pub mod theme;
 pub mod tree;
 pub mod view;
 
-use std::num::NonZeroUsize;
+use std::{borrow::Cow, num::NonZeroUsize, path::Path};
 
 // uses NonZeroUsize so Option<DocumentId> use a byte rather than two
 #[derive(Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Hash, Debug)]
@@ -72,8 +72,152 @@ pub fn align_view(doc: &mut Document, view: &View, align: Align) {
     doc.set_view_offset(view.id, view_offset);
 }
 
+/// Returns the left-side position of the primary selection.
+pub fn primary_cursor(view: &View, doc: &Document) -> usize {
+    doc.selection(view.id)
+        .primary()
+        .cursor(doc.text().slice(..))
+}
+
+/// Returns the next diagnostic in the document if any.
+///
+/// This does not wrap-around.
+pub fn next_diagnostic_in_doc<'d>(
+    view: &View,
+    doc: &'d Document,
+    severity_filter: Option<helix_core::diagnostic::Severity>,
+) -> Option<&'d Diagnostic> {
+    let cursor = primary_cursor(view, doc);
+    doc.diagnostics()
+        .iter()
+        .filter(|diagnostic| diagnostic.severity >= severity_filter)
+        .find(|diag| diag.range.start > cursor)
+}
+
+/// Returns the previous diagnostic in the document if any.
+///
+/// This does not wrap-around.
+pub fn prev_diagnostic_in_doc<'d>(
+    view: &View,
+    doc: &'d Document,
+    severity_filter: Option<helix_core::diagnostic::Severity>,
+) -> Option<&'d Diagnostic> {
+    let cursor = primary_cursor(view, doc);
+    doc.diagnostics()
+        .iter()
+        .rev()
+        .filter(|diagnostic| diagnostic.severity >= severity_filter)
+        .find(|diag| diag.range.start < cursor)
+}
+
+pub struct WorkspaceDiagnostic<'e> {
+    pub path: Cow<'e, Path>,
+    pub diagnostic: Cow<'e, helix_lsp::lsp::Diagnostic>,
+    pub offset_encoding: OffsetEncoding,
+}
+impl<'e> WorkspaceDiagnostic<'e> {
+    pub fn into_owned(self) -> WorkspaceDiagnostic<'static> {
+        WorkspaceDiagnostic {
+            path: Cow::Owned(self.path.into_owned()),
+            diagnostic: Cow::Owned(self.diagnostic.into_owned()),
+            offset_encoding: self.offset_encoding,
+        }
+    }
+}
+
+fn workspace_diagnostics<'e>(
+    editor: &'e Editor,
+    severity_filter: Option<helix_core::diagnostic::Severity>,
+) -> impl Iterator<Item = WorkspaceDiagnostic<'e>> {
+    editor
+        .diagnostics
+        .iter()
+        .filter_map(|(uri, diagnostics)| {
+            // Extract Path from diagnostic Uri, skipping diagnostics that don't have a path.
+            uri.as_path().map(|p| (p, diagnostics))
+        })
+        .flat_map(|(path, diagnostics)| {
+            diagnostics
+                .iter()
+                .map(move |(diagnostic, language_server_id)| (path, diagnostic, language_server_id))
+        })
+        .filter(move |(_, diagnostic, _)| {
+            // Filter by severity
+            let severity = diagnostic
+                .severity
+                .and_then(Document::lsp_severity_to_severity);
+            severity >= severity_filter
+        })
+        .map(|(path, diag, language_server_id)| {
+            // Map language server ID to offset encoding
+            let offset_encoding = editor
+                .language_server_by_id(*language_server_id)
+                .map(|client| client.offset_encoding())
+                .unwrap_or_default();
+            (path, diag, offset_encoding)
+        })
+        .map(|(path, diagnostic, offset_encoding)| WorkspaceDiagnostic {
+            path: Cow::Borrowed(path),
+            diagnostic: Cow::Borrowed(diagnostic),
+            offset_encoding,
+        })
+}
+
+pub fn first_diagnostic_in_workspace(
+    editor: &Editor,
+    severity_filter: Option<helix_core::diagnostic::Severity>,
+) -> Option<WorkspaceDiagnostic> {
+    workspace_diagnostics(editor, severity_filter).next()
+}
+
+pub fn next_diagnostic_in_workspace(
+    editor: &Editor,
+    severity_filter: Option<helix_core::diagnostic::Severity>,
+) -> Option<WorkspaceDiagnostic> {
+    let (view, doc) = current_ref!(editor);
+
+    let Some(current_doc_path) = doc.path() else {
+        return first_diagnostic_in_workspace(editor, severity_filter);
+    };
+
+    let cursor = primary_cursor(view, doc);
+
+    workspace_diagnostics(editor, severity_filter)
+        .filter(|d| {
+            // Skip diagnostics before the current document
+            d.path >= current_doc_path.as_path()
+        })
+        .filter(|d| {
+            // Skip diagnostics before the primary cursor in the current document
+            if d.path == current_doc_path.as_path() {
+                let Some(start) = helix_lsp::util::lsp_pos_to_pos(
+                    doc.text(),
+                    d.diagnostic.range.start,
+                    d.offset_encoding,
+                ) else {
+                    return false;
+                };
+                if start <= cursor {
+                    return false;
+                }
+            }
+            true
+        })
+        .next()
+}
+
+pub fn ensure_selections_forward(view: &View, doc: &mut Document) {
+    let selection = doc
+        .selection(view.id)
+        .clone()
+        .transform(|r| r.with_direction(Direction::Forward));
+
+    doc.set_selection(view.id, selection);
+}
+
 pub use document::Document;
 pub use editor::Editor;
-use helix_core::char_idx_at_visual_offset;
+use helix_core::{char_idx_at_visual_offset, movement::Direction, Diagnostic};
+use helix_lsp::OffsetEncoding;
 pub use theme::Theme;
 pub use view::View;