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Never fail to indent #21

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Dec 10, 2024
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Never fail to indent #21

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46 changes: 32 additions & 14 deletions purescript-indentation.el
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Original file line number Diff line number Diff line change
Expand Up @@ -463,21 +463,39 @@ autofill-mode."
(defun purescript-indentation-first-indentation ()
(if (eq purescript-literate 'bird) '(2) '(0)))

(defun purescript-get-previous-indentation-hack ()
"Return previous indentation level as a list element.
This function is a temporary workaround for
`purescript-newline-and-indent' asking for indent before going to the
new line, which makes it indistinguishable from just attempting to
indent the current line. This has to be fixed elsewhere."
(list
(if (string= this-command "purescript-newline-and-indent")
(current-indentation) ;; current line is actually previous one
(save-excursion
(forward-line -1)
(current-indentation)))))

(defun purescript-indentation-find-indentations ()
(let ((ppss (syntax-ppss)))
(cond
((nth 3 ppss)
(purescript-indentation-first-indentation))
((nth 4 ppss)
(if (save-excursion
(and (skip-syntax-forward "-")
(eolp)
(not (> (forward-line 1) 0))
(not (nth 4 (syntax-ppss)))))
(purescript-indentation-parse-to-indentations)
(purescript-indentation-first-indentation)))
(t
(purescript-indentation-parse-to-indentations)))))
(condition-case nil
(let ((ppss (syntax-ppss)))
(cond
((nth 3 ppss)
(purescript-indentation-first-indentation))
((nth 4 ppss)
(if (save-excursion
(and (skip-syntax-forward "-")
(eolp)
(not (> (forward-line 1) 0))
(not (nth 4 (syntax-ppss)))))
(purescript-indentation-parse-to-indentations)
(purescript-indentation-first-indentation)))
(t
(purescript-indentation-parse-to-indentations))))
;; Ideally it should not return parse error but if it does just use the previous
;; indentation.
(parse-error (purescript-get-previous-indentation-hack))))

(defconst purescript-indentation-unicode-tokens
'(("→" . "->") ;; #x2192 RIGHTWARDS ARROW
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