gotools/gopls/internal/golang/extracttofile.go

// canExtractToNewFile reports whether the code in the given range can be extracted to a new file.
func canExtractToNewFile(pgf *parsego.File, start, end token.Pos) bool { … }

// findImportEdits finds imports specs that needs to be added to the new file
// or deleted from the old file if the range is extracted to a new file.
//
// TODO: handle dot imports.
func findImportEdits(file *ast.File, info *types.Info, start, end token.Pos) (adds, deletes []*ast.ImportSpec, _ error) { … }

// ExtractToNewFile moves selected declarations into a new file.
func ExtractToNewFile(ctx context.Context, snapshot *cache.Snapshot, fh file.Handle, rng protocol.Range) ([]protocol.DocumentChange, error) { … }

// chooseNewFile chooses a new filename in dir, based on the name of the
// first extracted symbol, and if necessary to disambiguate, a numeric suffix.
func chooseNewFile(ctx context.Context, snapshot *cache.Snapshot, dir string, firstSymbol string) (file.Handle, error) { … }

// selectedToplevelDecls returns the lexical extent of the top-level
// declarations enclosed by [start, end), along with the name of the
// first declaration. The returned boolean reports whether the selection
// should be offered a code action to extract the declarations.
func selectedToplevelDecls(pgf *parsego.File, start, end token.Pos) (token.Pos, token.Pos, string, bool) { … }

// unparenthesizedImports returns a map from each unparenthesized ImportSpec
// to its enclosing declaration (which may need to be deleted too).
func unparenthesizedImports(pgf *parsego.File) map[*ast.ImportSpec]*ast.GenDecl { … }

// removeNode returns a TextEdit that removes the node.
func removeNode(pgf *parsego.File, node ast.Node) protocol.TextEdit { … }

// posRangeIntersects checks if [a, b) and [c, d) intersects, assuming a <= b and c <= d.
func posRangeIntersects(a, b, c, d token.Pos) bool { … }

// posRangeContains checks if [a, b) contains [c, d), assuming a <= b and c <= d.
func posRangeContains(a, b, c, d token.Pos) bool { … }