np/verilog-align-ports
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Add function for alignment of named port connections in module instantiations.

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This commit is contained in:
Nikolay Puzanov
2026-02-08 13:39:22 +03:00
parent 6f6e4ef29b
commit 2102adc1da
3 changed files with 236 additions and 3 deletions
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159
verilog-align-ports.el
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@@ -16,6 +16,16 @@
(line-end-position))))
(string-match-p "^\\s-*\\(input\\|output\\|inout\\)\\b" line))))
(defun verilog-align-ports--line-inst-port-p (pos)
(save-excursion
(goto-char pos)
(let ((line (buffer-substring-no-properties
(line-beginning-position)
(line-end-position))))
(string-match-p
"^\\s-*\\.\\(\\\\[^[:space:]]+\\|[A-Za-z_][A-Za-z0-9_$]*\\)\\b"
line))))
(defun verilog-align-ports--split-comment (line)
(let ((pos (string-match "//" line)))
(if pos
@@ -82,6 +92,26 @@
(verilog-align-ports--line-port-p
(line-beginning-position)))
(forward-line 1))
(setq end (line-beginning-position))
(cons start end)))))
(defun verilog-align-ports--inst-bounds ()
(save-excursion
(and (verilog-align-ports--line-inst-port-p (line-beginning-position))
(let ((start (line-beginning-position))
(end nil))
(while (and (not (bobp))
(save-excursion
(forward-line -1)
(verilog-align-ports--line-inst-port-p
(line-beginning-position))))
(forward-line -1)
(setq start (line-beginning-position)))
(goto-char start)
(while (and (not (eobp))
(verilog-align-ports--line-inst-port-p
(line-beginning-position)))
(forward-line 1))
(setq end (line-beginning-position))
(cons start end)))))
@@ -99,6 +129,76 @@
(forward-line 1)))
(nreverse entries)))
(defun verilog-align-ports--find-paren-end (text start)
(let ((depth 0)
(idx start)
(len (length text))
(end nil))
(while (and (< idx len) (not end))
(let ((ch (aref text idx)))
(cond
((eq ch ?\() (setq depth (1+ depth)))
((eq ch ?\))
(setq depth (1- depth))
(when (eq depth 0)
(setq end (1+ idx))))))
(setq idx (1+ idx)))
end))
(defun verilog-align-ports--parse-inst-line (line)
(let* ((split (verilog-align-ports--split-comment line))
(code (string-trim-right (car split)))
(comment (cdr split)))
(when (string-match
"^\\(\\s-*\\)\\.\\(\\\\[^[:space:]]+\\|[A-Za-z_][A-Za-z0-9_$]*\\)\\(.*\\)$"
code)
(let* ((indent (match-string 1 code))
(name (match-string 2 code))
(rest (match-string 3 code))
(rest (if rest (string-trim-right rest) ""))
(pos (string-match "\\S-" rest))
(has-conn nil)
(conn "")
(comma nil))
(if (and pos (< pos (length rest)) (eq (aref rest pos) ?\())
(let* ((end (verilog-align-ports--find-paren-end rest pos)))
(if end
(progn
(setq has-conn t)
(setq conn (string-trim (substring rest (1+ pos) (1- end))))
(let ((after (string-trim (substring rest end))))
(when (and (> (length after) 0)
(eq (aref after 0) ?,))
(setq comma ","))))
(let ((after (string-trim rest)))
(when (and (> (length after) 0)
(string-match-p "," after))
(setq comma ",")))))
(let ((after (string-trim rest)))
(when (and (> (length after) 0)
(string-match-p "," after))
(setq comma ","))))
(list :indent indent
:name name
:has-conn has-conn
:conn conn
:comma comma
:comment comment)))))
(defun verilog-align-ports--inst-collect (start end)
(let (entries)
(save-excursion
(goto-char start)
(while (< (point) end)
(let* ((line (buffer-substring-no-properties
(line-beginning-position)
(line-end-position)))
(entry (verilog-align-ports--parse-inst-line line)))
(when entry
(push entry entries)))
(forward-line 1)))
(nreverse entries)))
(defun verilog-align-ports--max-lengths (entries)
(let ((max-dir 0)
(max-type 0)
@@ -153,9 +253,48 @@
(when has-range range-pad)
name
(when (and has-comment comment) name-pad)
(or comment ""))))
(or comment ""))))
entries)))
(defun verilog-align-ports--inst-format-lines (entries)
(let* ((base-indent (plist-get (car entries) :indent))
(max-name 0)
(has-comment nil)
left-parts
(max-left 0))
(dolist (entry entries)
(let ((name-len (+ 1 (length (plist-get entry :name)))))
(setq max-name (max max-name name-len)))
(when (plist-get entry :comment)
(setq has-comment t)))
(dolist (entry entries)
(let* ((name (plist-get entry :name))
(name-field (concat "." name))
(has-conn (plist-get entry :has-conn))
(conn (plist-get entry :conn))
(comma (plist-get entry :comma))
(pad (when has-conn
(verilog-align-ports--pad max-name (length name-field))))
(left (concat base-indent
name-field
(when has-conn pad)
(when has-conn "(")
(when has-conn conn)
(when has-conn ")")
(when comma ","))))
(push left left-parts)
(setq max-left (max max-left (length left)))))
(setq left-parts (nreverse left-parts))
(cl-mapcar
(lambda (entry left)
(let ((comment (plist-get entry :comment)))
(if (and has-comment comment)
(concat left
(verilog-align-ports--pad max-left (length left))
comment)
left)))
entries left-parts)))
(defun verilog-align-ports--apply (start lines)
(save-excursion
(goto-char start)
@@ -169,12 +308,26 @@
"Align SystemVerilog port declarations around point."
(interactive)
(let ((bounds (verilog-align-ports--bounds)))
(and bounds
(let* ((start (car bounds))
(end (cdr bounds))
(entries (verilog-align-ports--collect start end)))
(and entries
(let ((lines (verilog-align-ports--format-lines entries)))
(verilog-align-ports--apply start lines)
t))))))
;;;###autoload
(defun verilog-align-ports-instantiation ()
"Align SystemVerilog named port connections around point."
(interactive)
(let ((bounds (verilog-align-ports--inst-bounds)))
(and bounds
(let* ((start (car bounds))
(end (cdr bounds))
(entries (verilog-align-ports--collect start end)))
(entries (verilog-align-ports--inst-collect start end)))
(and entries
(let ((lines (verilog-align-ports--format-lines entries)))
(let ((lines (verilog-align-ports--inst-format-lines entries)))
(verilog-align-ports--apply start lines)
t))))))