vendor tsgo

tools/tsgo/internal/ls/api.go

@@ -0,0 +1,44 @@
+package ls
+
+import (
+	"context"
+	"errors"
+	"fmt"
+
+	"github.com/microsoft/typescript-go/internal/ast"
+	"github.com/microsoft/typescript-go/internal/astnav"
+	"github.com/microsoft/typescript-go/internal/checker"
+)
+
+var (
+	ErrNoSourceFile      = errors.New("source file not found")
+	ErrNoTokenAtPosition = errors.New("no token found at position")
+)
+
+func (l *LanguageService) GetSymbolAtPosition(ctx context.Context, fileName string, position int) (*ast.Symbol, error) {
+	program, file := l.tryGetProgramAndFile(fileName)
+	if file == nil {
+		return nil, fmt.Errorf("%w: %s", ErrNoSourceFile, fileName)
+	}
+	node := astnav.GetTokenAtPosition(file, position)
+	if node == nil {
+		return nil, fmt.Errorf("%w: %s:%d", ErrNoTokenAtPosition, fileName, position)
+	}
+	checker, done := program.GetTypeCheckerForFile(ctx, file)
+	defer done()
+	return checker.GetSymbolAtLocation(node), nil
+}
+
+func (l *LanguageService) GetSymbolAtLocation(ctx context.Context, node *ast.Node) *ast.Symbol {
+	program := l.GetProgram()
+	checker, done := program.GetTypeCheckerForFile(ctx, ast.GetSourceFileOfNode(node))
+	defer done()
+	return checker.GetSymbolAtLocation(node)
+}
+
+func (l *LanguageService) GetTypeOfSymbol(ctx context.Context, symbol *ast.Symbol) *checker.Type {
+	program := l.GetProgram()
+	checker, done := program.GetTypeChecker(ctx)
+	defer done()
+	return checker.GetTypeOfSymbolAtLocation(symbol, nil)
+}