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|
;;; yasnippet-debug.el --- debug functions for yasnippet -*- lexical-binding: t -*-
;; Copyright (C) 2010, 2013-2014, 2017-2018 Free Software Foundation, Inc.
;; Author: João Távora
;; Keywords: emulations, convenience
;; This program is free software; you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation, either version 3 of the License, or
;; (at your option) any later version.
;; This program is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;; GNU General Public License for more details.
;; You should have received a copy of the GNU General Public License
;; along with this program. If not, see <http://www.gnu.org/licenses/>.
;;; Commentary:
;; Some debug functions. When loaded from the command line, provides
;; quick way to test out snippets in a fresh Emacs instance.
;;
;; emacs -Q -l yasnippet-debug [-v[v]]
;; [-M:<modename>] [-M.<filext>] [-S:[<snippet-file|name>]]
;; [-- <more-arguments-passed-to-Emacs>...]
;;
;; See the source in `yas-debug-process-command-line' for meaning of
;; args.
;;
;;; Code:
(defconst yas--loaddir
(file-name-directory (or load-file-name buffer-file-name))
"Directory that yasnippet was loaded from.")
(require 'yasnippet (if (boundp 'yas--loaddir)
;; Don't require '-L <path>' when debugging.
(expand-file-name "yasnippet" yas--loaddir)))
(require 'cl-lib)
(eval-when-compile
(unless (fboundp 'cl-flet)
(defalias 'cl-flet 'flet)))
(require 'color nil t)
(require 'edebug)
(eval-when-compile
(require 'subr-x nil t)
(cond ((fboundp 'when-let*) nil) ; Introduced in 26.
((fboundp 'when-let) ; Introduced in 25.1,
(defalias 'when-let* 'when-let)) ; deprecated in 26.
(t (defmacro when-let* (key-vals &rest body)
(declare (indent 1) (debug ((symbolp form) body)))
(let ((key-val (pop key-vals)))
(if key-val
`(let ((,(car key-val) ,(cadr key-val)))
(if ,(car key-val)
(when-let* ,key-vals
,@body)))
`(progn ,@body)))))))
(defvar yas-debug-live-indicators
(make-hash-table :test #'eq))
(defun yas-debug-live-colors ()
(let ((colors ()))
(maphash (lambda (_k v) (push (nth 1 (car v)) colors)) yas-debug-live-indicators)
colors))
(defvar yas-debug-recently-live-indicators)
(defun yas-debug-get-live-indicator (location)
(require 'color)
(when (boundp 'yas-debug-recently-live-indicators)
(push location yas-debug-recently-live-indicators))
(let (beg end)
(if (markerp location)
(setq beg (setq end (marker-position location)))
(setq beg (yas-debug-ov-fom-start location)
end (yas-debug-ov-fom-end location)))
(or (when-let* ((color-ov (gethash location yas-debug-live-indicators)))
(if (and beg end) (move-overlay (cdr color-ov) beg end)
(delete-overlay (cdr color-ov)))
color-ov)
(let* ((live-colors (yas-debug-live-colors))
(color
(cl-loop with best-color = nil with max-dist = -1
for color = (format "#%06X" (random #x1000000))
for comp = (if (fboundp 'color-complement)
(apply #'color-rgb-to-hex (color-complement color))
color)
if (< (color-distance color (face-foreground 'default))
(color-distance comp (face-foreground 'default)))
do (setq color comp)
for dist = (cl-loop for c in live-colors
minimize (color-distance c color))
if (or (not live-colors) (> dist max-dist))
do (setq best-color color) (setq max-dist dist)
repeat (if live-colors 100 1)
finally return `(:background ,best-color)))
(ov (make-overlay beg end)))
(if (markerp location)
(overlay-put ov 'before-string (propertize "↓" 'face color))
(overlay-put ov 'before-string (propertize "↘" 'face color))
(overlay-put ov 'after-string (propertize "↙" 'face color)))
(puthash location (cons color ov) yas-debug-live-indicators)))))
(defun yas-debug-live-marker (marker)
(let* ((color-ov (yas-debug-get-live-indicator marker))
(color (car color-ov))
(ov (cdr color-ov))
(decorator (overlay-get ov 'before-string))
(str (format "at %d" (+ marker))))
(if (markerp marker)
(propertize str
'cursor-sensor-functions
`(,(lambda (_window _oldpos dir)
(overlay-put
ov 'before-string
(propertize decorator
'face (if (eq dir 'entered)
'mode-line-highlight color)))))
'face color)
str)))
(defun yas-debug-ov-fom-start (ovfom)
(cond ((overlayp ovfom) (overlay-start ovfom))
((integerp ovfom) ovfom)
(t (yas--fom-start ovfom))))
(defun yas-debug-ov-fom-end (ovfom)
(cond ((overlayp ovfom) (overlay-end ovfom))
((integerp ovfom) ovfom)
(t (yas--fom-end ovfom))))
(defun yas-debug-live-range (range)
(let* ((color-ov (yas-debug-get-live-indicator range))
(color (car color-ov))
(ov (cdr color-ov))
(decorator-beg (overlay-get ov 'before-string))
(decorator-end (overlay-get ov 'after-string))
(beg (yas-debug-ov-fom-start range))
(end (yas-debug-ov-fom-end range)))
(if (and beg end (or (overlayp range)
(and (not (integerp beg))
(not (integerp end)))))
(propertize (format "from %d to %d" (+ beg) (+ end))
'cursor-sensor-functions
`(,(lambda (_window _oldpos dir)
(let ((face (if (eq dir 'entered)
'mode-line-highlight color)))
(overlay-put ov 'before-string
(propertize decorator-beg 'face face))
(overlay-put ov 'after-string
(propertize decorator-end 'face face)))))
'face color)
"<dead>")))
(defmacro yas-debug-with-tracebuf (outbuf &rest body)
(declare (indent 1) (debug (sexp body)))
(let ((tracebuf-var (make-symbol "tracebuf")))
`(let ((,tracebuf-var (or ,outbuf (get-buffer-create "*YASnippet trace*"))))
(unless (eq ,tracebuf-var (current-buffer))
(cl-flet ((printf (fmt &rest args)
(with-current-buffer ,tracebuf-var
(insert (apply #'format fmt args)))))
(unless ,outbuf
(with-current-buffer ,tracebuf-var
(erase-buffer)
(when (fboundp 'cursor-sensor-mode)
(cursor-sensor-mode +1))
(setq truncate-lines t)))
(setq ,outbuf ,tracebuf-var)
(save-restriction
(widen)
,@body))))))
(defun yas-debug-snippet (snippet &optional outbuf)
(yas-debug-with-tracebuf outbuf
(when-let* ((overlay (yas--snippet-control-overlay snippet)))
(printf "\tsid: %d control overlay %s\n"
(yas--snippet-id snippet)
(yas-debug-live-range overlay)))
(when-let* ((active-field (yas--snippet-active-field snippet)))
(unless (consp (yas--field-start active-field))
(printf "\tactive field: #%d %s %s covering \"%s\"\n"
(or (yas--field-number active-field) -1)
(if (yas--field-modified-p active-field) "**" "--")
(yas-debug-live-range active-field)
(buffer-substring-no-properties (yas--field-start active-field) (yas--field-end active-field)))))
(when-let* ((exit (yas--snippet-exit snippet)))
(printf "\tsnippet-exit: %s next: %s\n"
(yas-debug-live-marker (yas--exit-marker exit))
(yas--exit-next exit)))
(dolist (field (yas--snippet-fields snippet))
(unless (consp (yas--field-start field))
(printf "\tfield: %d %s %s covering \"%s\" next: %s%s\n"
(or (yas--field-number field) -1)
(if (yas--field-modified-p field) "**" "--")
(yas-debug-live-range field)
(buffer-substring-no-properties (yas--field-start field) (yas--field-end field))
(yas--debug-format-fom-concise (yas--field-next field))
(if (yas--field-parent-field field)
(format " parent: %s"
(yas--debug-format-fom-concise
(yas--field-parent-field field)))
"")))
(dolist (mirror (yas--field-mirrors field))
(unless (consp (yas--mirror-start mirror))
(printf "\t\tmirror: %s covering \"%s\" next: %s\n"
(yas-debug-live-range mirror)
(buffer-substring-no-properties (yas--mirror-start mirror) (yas--mirror-end mirror))
(yas--debug-format-fom-concise (yas--mirror-next mirror))))))))
(defvar yas-debug-target-buffer nil)
(defvar yas-debug-target-snippets nil nil)
(make-variable-buffer-local 'yas-debug-target-snippets)
(defvar yas-debug-undo nil)
(defun yas-toggle-debug-undo (value)
(interactive (list (not yas-debug-undo)))
(setq yas-debug-undo value)
(yas--message 3 "debug undo %sabled" (if yas-debug-undo "en" "dis")))
(defadvice yas--snippet-parse-create (before yas-debug-target-snippet (snippet))
(add-to-list 'yas-debug-target-snippets snippet))
(defadvice yas--commit-snippet (after yas-debug-untarget-snippet (snippet))
(setq yas-debug-target-snippets
(remq snippet yas-debug-target-snippets))
(maphash (lambda (k color-ov)
(delete-overlay (cdr color-ov)))
yas-debug-live-indicators)
(clrhash yas-debug-live-indicators))
(defun yas-debug-snippets (&optional outbuf hook)
"Print debug information on active snippets to buffer OUTBUF.
If OUTBUF is nil, use a buffer named \"*YASsnippet trace*\".
If HOOK is non-nil, install `yas-debug-snippets' in
`post-command-hook' to update the information on every command
after this one. If it is `snippet-navigation' then install hook
buffer-locally, otherwise install it globally. If HOOK is
`edebug-create', also instrument the function
`yas--snippet-parse-create' with `edebug' and show its source."
(interactive (list nil t))
(condition-case err
(yas-debug-with-tracebuf outbuf
(unless (buffer-live-p yas-debug-target-buffer)
(setq yas-debug-target-buffer nil))
(with-current-buffer (or yas-debug-target-buffer (current-buffer))
(when yas-debug-target-snippets
(setq yas-debug-target-snippets
(cl-delete-if-not #'yas--snippet-p yas-debug-target-snippets)))
(let ((yas-debug-recently-live-indicators nil))
(printf "(length yas--snippets-snippets) => %d\n"
(length yas--active-snippets))
(dolist (snippet (or yas-debug-target-snippets
(yas-active-snippets)))
(printf "snippet %d\n" (yas--snippet-id snippet))
(yas-debug-snippet snippet outbuf))
(maphash (lambda (loc color-ov)
(unless (memq loc yas-debug-recently-live-indicators)
(delete-overlay (cdr color-ov))
(remhash loc yas-debug-live-indicators)))
yas-debug-live-indicators))
(when (and yas-debug-undo (listp buffer-undo-list))
(printf "Undo list has %s elements:\n" (length buffer-undo-list))
(cl-loop for undo-elem in buffer-undo-list
do (printf "%S\n" undo-elem))))
(when hook
(setq yas-debug-target-buffer (current-buffer))
(ad-enable-advice 'yas--snippet-parse-create 'before 'yas-debug-target-snippet)
(ad-activate 'yas--snippet-parse-create)
(ad-enable-advice 'yas--commit-snippet 'after 'yas-debug-untarget-snippet)
(ad-activate 'yas--commit-snippet)
(add-hook 'post-command-hook #'yas-debug-snippets
nil (eq hook 'snippet-navigation))
;; Window management is slapped together, it does what I
;; want when the caller has a single window open. Good
;; enough for now.
(when (eq hook 'edebug-create)
(edebug-instrument-function 'yas--snippet-parse-create)
(let ((buf-point (find-function-noselect 'yas--snippet-parse-create)))
(with-current-buffer (car buf-point)
(goto-char (cdr buf-point)))))
outbuf))
((debug error) (signal (car err) (cdr err)))))
(defun yas-debug-snippet-create ()
(yas-debug-snippets nil 'create))
(defun yas--debug-format-fom-concise (fom)
(when fom
(cond ((yas--field-p fom)
(format "field %s from %d to %d"
(yas--field-number fom)
(+ (yas--field-start fom))
(+ (yas--field-end fom))))
((yas--mirror-p fom)
(format "mirror from %d to %d"
(+ (yas--mirror-start fom))
(+ (yas--mirror-end fom))))
(t
(format "snippet exit at %d"
(+ (yas--fom-start fom)))))))
(defun yas-debug-process-command-line (&optional options)
"Implement command line processing."
(setq yas-verbosity 99)
(setq yas-triggers-in-field t)
(setq debug-on-error t)
(let* ((snippet-mode 'fundamental-mode)
(snippet-key nil))
(unless options
(setq options (cl-loop for opt = (pop command-line-args-left)
while (and opt (not (equal opt "--"))
(string-prefix-p "-" opt))
collect opt)))
(when-let* ((mode (cl-member "-M:" options :test #'string-prefix-p)))
(setq snippet-mode (intern (concat (substring (car mode) 3) "-mode"))))
(when-let* ((mode (cl-member "-M." options :test #'string-prefix-p)))
(setq snippet-mode
(cdr (cl-assoc (substring (car mode) 2) auto-mode-alist
:test (lambda (ext regexp) (string-match-p regexp ext))))))
(switch-to-buffer (get-buffer-create "*yas test*"))
(funcall snippet-mode)
(when-let* ((snippet-file (cl-member "-S:" options :test #'string-prefix-p)))
(setq snippet-file (substring (car snippet-file) 3))
(if (file-exists-p snippet-file)
(with-temp-buffer
(insert-file-contents snippet-file)
(let ((snippet-deflist (yas--parse-template snippet-file)))
(yas-define-snippets snippet-mode (list snippet-deflist))
(setq snippet-key (car snippet-deflist))))
(yas-reload-all)
(let ((template (yas--lookup-snippet-1 snippet-file snippet-mode)))
(if template
(setq snippet-key (yas--template-key template))
(error "No such snippet `%s'" snippet-file)))))
(display-buffer (find-file-noselect
(expand-file-name "yasnippet.el" yas--loaddir)))
(when-let* ((verbosity (car (or (member "-v" options) (member "-vv" options)))))
(set-window-buffer
(split-window) (yas-debug-snippets
nil (if (equal verbosity "-vv") 'edebug-create t))))
(yas-minor-mode +1)
(when snippet-key (insert snippet-key))))
(when command-line-args-left
(yas-debug-process-command-line))
(provide 'yasnippet-debug)
;; Local Variables:
;; indent-tabs-mode: nil
;; autoload-compute-prefixes: nil
;; End:
;;; yasnippet-debug.el ends here
|
