Merge pull request #31 from vknabel/feature/syntax-highlighting-#28

Feature/syntax highlighting #28

.vscode/settings.json

@@ -0,0 +1,3 @@
+{
+  "lithia.path": "/Users/vknabel/dev/lithia/lithia"
+}

CHANGELOG.md

@@ -1,5 +1,10 @@
 # Changelog
 
+## v0.0.13
+
+- lsp: semantic syntax highlighting #28
+- lsp: diagnostics #29
+
 ## v0.0.12
 
 - cli: new CLI interface, including, help and version

langsrv/document-cache.go

@@ -0,0 +1,18 @@
+package langsrv
+
+import (
+	protocol "github.com/tliron/glsp/protocol_3_16"
+	"github.com/vknabel/lithia/ast"
+	"github.com/vknabel/lithia/parser"
+)
+
+type documentCache struct {
+	documents map[protocol.URI]*textDocumentEntry
+}
+
+type textDocumentEntry struct {
+	item       protocol.TextDocumentItem
+	parser     *parser.Parser
+	fileParser *parser.FileParser
+	sourceFile *ast.SourceFile
+}

langsrv/handler-text-document-did-change.go

@@ -0,0 +1,34 @@
+package langsrv
+
+import (
+	"github.com/tliron/glsp"
+	protocol "github.com/tliron/glsp/protocol_3_16"
+)
+
+func textDocumentDidChange(context *glsp.Context, params *protocol.DidChangeTextDocumentParams) error {
+	entry := langserver.documentCache.documents[params.TextDocument.URI]
+	text := entry.item.Text
+	for _, event := range params.ContentChanges {
+		switch e := event.(type) {
+		case protocol.TextDocumentContentChangeEvent:
+			text = text[:e.Range.Start.IndexIn(text)] + e.Text + text[e.Range.End.IndexIn(text):]
+		case protocol.TextDocumentContentChangeEventWhole:
+			text = e.Text
+		}
+	}
+	entry.item.Text = text
+	fileParser, errs := entry.parser.Parse("default-module", string(params.TextDocument.URI), text)
+	if len(errs) > 0 {
+		publishSyntaxErrorDiagnostics(context, params.TextDocument.URI, uint32(params.TextDocument.Version), errs)
+		return nil
+	}
+	sourceFile, errs := fileParser.ParseSourceFile()
+	if len(errs) > 0 {
+		publishSyntaxErrorDiagnostics(context, params.TextDocument.URI, uint32(params.TextDocument.Version), errs)
+		return nil
+	}
+	langserver.documentCache.documents[params.TextDocument.URI].fileParser = fileParser
+	langserver.documentCache.documents[params.TextDocument.URI].sourceFile = sourceFile
+	publishSyntaxErrorDiagnostics(context, params.TextDocument.URI, uint32(params.TextDocument.Version), nil)
+	return nil
+}

langsrv/handler-text-document-did-open.go

@@ -0,0 +1,29 @@
+package langsrv
+
+import (
+	"github.com/tliron/glsp"
+	protocol "github.com/tliron/glsp/protocol_3_16"
+	"github.com/vknabel/lithia/parser"
+)
+
+func textDocumentDidOpen(context *glsp.Context, params *protocol.DidOpenTextDocumentParams) error {
+	lithiaParser := parser.NewParser()
+	fileParser, errs := lithiaParser.Parse("default-module", string(params.TextDocument.URI), params.TextDocument.Text)
+	if len(errs) > 0 {
+		publishSyntaxErrorDiagnostics(context, params.TextDocument.URI, uint32(params.TextDocument.Version), errs)
+		return nil
+	}
+	sourceFile, errs := fileParser.ParseSourceFile()
+	if len(errs) > 0 {
+		publishSyntaxErrorDiagnostics(context, params.TextDocument.URI, uint32(params.TextDocument.Version), errs)
+		return nil
+	}
+	langserver.documentCache.documents[params.TextDocument.URI] = &textDocumentEntry{
+		item:       params.TextDocument,
+		parser:     lithiaParser,
+		fileParser: fileParser,
+		sourceFile: sourceFile,
+	}
+	publishSyntaxErrorDiagnostics(context, params.TextDocument.URI, uint32(params.TextDocument.Version), nil)
+	return nil
+}