Initialize diagnostics when opening a document (#8873)

2 files changed, 155 insertions, 21 deletions

diff --git a/helix-view/src/document.rs b/helix-view/src/document.rs
index 51668ab1..0de0cd17 100644
--- a/helix-view/src/document.rs
+++ b/helix-view/src/document.rs
@@ -4,10 +4,12 @@ use arc_swap::ArcSwap;
 use futures_util::future::BoxFuture;
 use futures_util::FutureExt;
 use helix_core::auto_pairs::AutoPairs;
+use helix_core::chars::char_is_word;
 use helix_core::doc_formatter::TextFormat;
 use helix_core::encoding::Encoding;
 use helix_core::syntax::{Highlight, LanguageServerFeature};
 use helix_core::text_annotations::{InlineAnnotation, TextAnnotations};
+use helix_lsp::util::lsp_pos_to_pos;
 use helix_vcs::{DiffHandle, DiffProviderRegistry};
 
 use ::parking_lot::Mutex;
@@ -1075,14 +1077,6 @@ impl Document {
         };
     }
 
-    /// Set the programming language for the file if you know the name (scope) but don't have the
-    /// [`syntax::LanguageConfiguration`] for it.
-    pub fn set_language2(&mut self, scope: &str, config_loader: Arc<syntax::Loader>) {
-        let language_config = config_loader.language_config_for_scope(scope);
-
-        self.set_language(language_config, Some(config_loader));
-    }
-
     /// Set the programming language for the file if you know the language but don't have the
     /// [`syntax::LanguageConfiguration`] for it.
     pub fn set_language_by_language_id(
@@ -1714,29 +1708,107 @@ impl Document {
         )
     }
 
+    pub fn lsp_diagnostic_to_diagnostic(
+        text: &Rope,
+        language_config: Option<&LanguageConfiguration>,
+        diagnostic: &helix_lsp::lsp::Diagnostic,
+        language_server_id: usize,
+        offset_encoding: helix_lsp::OffsetEncoding,
+    ) -> Option<Diagnostic> {
+        use helix_core::diagnostic::{Range, Severity::*};
+
+        // TODO: convert inside server
+        let start =
+            if let Some(start) = lsp_pos_to_pos(text, diagnostic.range.start, offset_encoding) {
+                start
+            } else {
+                log::warn!("lsp position out of bounds - {:?}", diagnostic);
+                return None;
+            };
+
+        let end = if let Some(end) = lsp_pos_to_pos(text, diagnostic.range.end, offset_encoding) {
+            end
+        } else {
+            log::warn!("lsp position out of bounds - {:?}", diagnostic);
+            return None;
+        };
+
+        let severity = diagnostic.severity.map(|severity| match severity {
+            lsp::DiagnosticSeverity::ERROR => Error,
+            lsp::DiagnosticSeverity::WARNING => Warning,
+            lsp::DiagnosticSeverity::INFORMATION => Info,
+            lsp::DiagnosticSeverity::HINT => Hint,
+            severity => unreachable!("unrecognized diagnostic severity: {:?}", severity),
+        });
+
+        if let Some(lang_conf) = language_config {
+            if let Some(severity) = severity {
+                if severity < lang_conf.diagnostic_severity {
+                    return None;
+                }
+            }
+        };
+        use helix_core::diagnostic::{DiagnosticTag, NumberOrString};
+
+        let code = match diagnostic.code.clone() {
+            Some(x) => match x {
+                lsp::NumberOrString::Number(x) => Some(NumberOrString::Number(x)),
+                lsp::NumberOrString::String(x) => Some(NumberOrString::String(x)),
+            },
+            None => None,
+        };
+
+        let tags = if let Some(tags) = &diagnostic.tags {
+            let new_tags = tags
+                .iter()
+                .filter_map(|tag| match *tag {
+                    lsp::DiagnosticTag::DEPRECATED => Some(DiagnosticTag::Deprecated),
+                    lsp::DiagnosticTag::UNNECESSARY => Some(DiagnosticTag::Unnecessary),
+                    _ => None,
+                })
+                .collect();
+
+            new_tags
+        } else {
+            Vec::new()
+        };
+
+        let ends_at_word =
+            start != end && end != 0 && text.get_char(end - 1).map_or(false, char_is_word);
+        let starts_at_word = start != end && text.get_char(start).map_or(false, char_is_word);
+
+        Some(Diagnostic {
+            range: Range { start, end },
+            ends_at_word,
+            starts_at_word,
+            zero_width: start == end,
+            line: diagnostic.range.start.line as usize,
+            message: diagnostic.message.clone(),
+            severity,
+            code,
+            tags,
+            source: diagnostic.source.clone(),
+            data: diagnostic.data.clone(),
+            language_server_id,
+        })
+    }
+
     #[inline]
     pub fn diagnostics(&self) -> &[Diagnostic] {
         &self.diagnostics
     }
 
-    pub fn shown_diagnostics(&self) -> impl Iterator<Item = &Diagnostic> + DoubleEndedIterator {
-        self.diagnostics.iter().filter(|d| {
-            self.language_servers_with_feature(LanguageServerFeature::Diagnostics)
-                .any(|ls| ls.id() == d.language_server_id)
-        })
-    }
-
     pub fn replace_diagnostics(
         &mut self,
         diagnostics: impl IntoIterator<Item = Diagnostic>,
         unchanged_sources: &[String],
-        language_server_id: usize,
+        language_server_id: Option<usize>,
     ) {
         if unchanged_sources.is_empty() {
             self.clear_diagnostics(language_server_id);
         } else {
             self.diagnostics.retain(|d| {
-                if d.language_server_id != language_server_id {
+                if language_server_id.map_or(false, |id| id != d.language_server_id) {
                     return true;
                 }
 
@@ -1757,9 +1829,13 @@ impl Document {
         });
     }
 
-    pub fn clear_diagnostics(&mut self, language_server_id: usize) {
-        self.diagnostics
-            .retain(|d| d.language_server_id != language_server_id);
+    /// clears diagnostics for a given language server id if set, otherwise all diagnostics are cleared
+    pub fn clear_diagnostics(&mut self, language_server_id: Option<usize>) {
+        if let Some(id) = language_server_id {
+            self.diagnostics.retain(|d| d.language_server_id != id);
+        } else {
+            self.diagnostics.clear();
+        }
     }
 
     /// Get the document's auto pairs. If the document has a recognized
diff --git a/helix-view/src/editor.rs b/helix-view/src/editor.rs
index 76429a87..c018668c 100644
--- a/helix-view/src/editor.rs
+++ b/helix-view/src/editor.rs
@@ -42,7 +42,7 @@ use anyhow::{anyhow, bail, Error};
 pub use helix_core::diagnostic::Severity;
 use helix_core::{
     auto_pairs::AutoPairs,
-    syntax::{self, AutoPairConfig, IndentationHeuristic, SoftWrap},
+    syntax::{self, AutoPairConfig, IndentationHeuristic, LanguageServerFeature, SoftWrap},
     Change, LineEnding, Position, Selection, NATIVE_LINE_ENDING,
 };
 use helix_dap as dap;
@@ -1477,6 +1477,10 @@ impl Editor {
                 self.config.clone(),
             )?;
 
+            let diagnostics =
+                Editor::doc_diagnostics(&self.language_servers, &self.diagnostics, &doc);
+            doc.replace_diagnostics(diagnostics, &[], None);
+
             if let Some(diff_base) = self.diff_providers.get_diff_base(&path) {
                 doc.set_diff_base(diff_base);
             }
@@ -1706,6 +1710,60 @@ impl Editor {
             .find(|doc| doc.path().map(|p| p == path.as_ref()).unwrap_or(false))
     }
 
+    /// Returns all supported diagnostics for the document
+    pub fn doc_diagnostics<'a>(
+        language_servers: &'a helix_lsp::Registry,
+        diagnostics: &'a BTreeMap<lsp::Url, Vec<(lsp::Diagnostic, usize)>>,
+        document: &Document,
+    ) -> impl Iterator<Item = helix_core::Diagnostic> + 'a {
+        Editor::doc_diagnostics_with_filter(language_servers, diagnostics, document, |_, _| true)
+    }
+
+    /// Returns all supported diagnostics for the document
+    /// filtered by `filter` which is invocated with the raw `lsp::Diagnostic` and the language server id it came from
+    pub fn doc_diagnostics_with_filter<'a>(
+        language_servers: &'a helix_lsp::Registry,
+        diagnostics: &'a BTreeMap<lsp::Url, Vec<(lsp::Diagnostic, usize)>>,
+
+        document: &Document,
+        filter: impl Fn(&lsp::Diagnostic, usize) -> bool + 'a,
+    ) -> impl Iterator<Item = helix_core::Diagnostic> + 'a {
+        let text = document.text().clone();
+        let language_config = document.language.clone();
+        document
+            .path()
+            .and_then(|path| url::Url::from_file_path(path).ok()) // TODO log error?
+            .and_then(|uri| diagnostics.get(&uri))
+            .map(|diags| {
+                diags.iter().filter_map(move |(diagnostic, lsp_id)| {
+                    let ls = language_servers.get_by_id(*lsp_id)?;
+                    language_config
+                        .as_ref()
+                        .and_then(|c| {
+                            c.language_servers.iter().find(|features| {
+                                features.name == ls.name()
+                                    && features.has_feature(LanguageServerFeature::Diagnostics)
+                            })
+                        })
+                        .and_then(|_| {
+                            if filter(diagnostic, *lsp_id) {
+                                Document::lsp_diagnostic_to_diagnostic(
+                                    &text,
+                                    language_config.as_deref(),
+                                    diagnostic,
+                                    *lsp_id,
+                                    ls.offset_encoding(),
+                                )
+                            } else {
+                                None
+                            }
+                        })
+                })
+            })
+            .into_iter()
+            .flatten()
+    }
+
     /// Gets the primary cursor position in screen coordinates,
     /// or `None` if the primary cursor is not visible on screen.
     pub fn cursor(&self) -> (Option<Position>, CursorKind) {