>>>>> Greg Bognar <greg.bog...@startmail.com> writes: > 1. Unfortunately, the new function definition below does not work with > okular. Same problem as before.
Too bad. :-) > 2. All of the environment variables PDFVIEWER, PDFVIEWER_texdoc, > TEXDOCVIEW_pdf, and TEXDOC_VIEWER_PDF have an empty value. Thank you. It seems that the reported behavior originates from okular's own nature. Then can you test the code at the last of this message? [Rationale] The reason that `TeX-documentation-texdoc' tries hard to collect and show the output from Texdoc is that the exit code wasn't meaningful once[1]. However, recent Texdoc is improved to return non-zero exit code when it can't find documentation for the given keyword[2]. Thus I think that AUCTeX need not collect the output now; it just has to look at the exit code. We can use `call-process' (with `executable-find' test in case that Texdoc isn't available) to run Texdoc. This has a drawback that the user who sticks to older TeX Live distribution isn't notified at all when the given keyword didn't match any documentation, but I expect it's permissible. Mosè, what do you think about it? Regards, Ikumi Keita #StandWithUkraine #StopWarInUkraine [1] https://debbugs.gnu.org/cgi/bugreport.cgi?bug=28905#17 [2] https://tug.org/texdoc/doc/texdoc.man1.pdf ---------------------------------------------------------------------- (defun TeX-documentation-texdoc (&optional arg) "Run texdoc to read documentation. Prompt for selection of the package of which to show the documentation. If called with a prefix argument ARG, after selecting the package, prompt for selection of the manual of that package to show." (interactive "P") (let ((pkg (thing-at-point 'symbol)) buffer list doc) ;; Strip off properties. XXX: XEmacs doesn't have ;; `substring-no-properties'. (set-text-properties 0 (length pkg) nil pkg) (setq pkg (TeX-read-string "View documentation for: " pkg)) (unless (zerop (length pkg)) (if arg ;; Called with prefix argument: run "texdoc --list --nointeract <pkg>" (progn ;; Create the buffer, insert the result of the command, and ;; accumulate the list of manuals. (with-current-buffer (get-buffer-create (setq buffer (format "*texdoc: %s*" pkg))) (erase-buffer) (insert (shell-command-to-string (concat "texdoc --list --nointeract " pkg))) (goto-char 1) ; No need to use `point-min' here. (save-excursion (while (re-search-forward ;; XXX: XEmacs doesn't support character classes in ;; regexps, like "[:alnum:]". "^ *\\([0-9]+\\) +\\([-~/a-zA-Z0-9_.${}#%,:\\ ()]+\\)" nil t) (push (cons (match-string 1) (match-string 2)) list)))) (unwind-protect (cond ((null (executable-find "texdoc")) ;; Note: `shell-command-to-string' uses shell, only ;; `call-process' looks at `exec-path', thus only here makes ;; sense to use `executable-find' to test whether texdoc is ;; available. (message "texdoc not found")) (list ;; Go on if there are manuals listed: show the buffer, prompt ;; for the number of the manual, then run ;; texdoc --just-view <doc> (TeX-pop-to-buffer (get-buffer buffer)) (condition-case nil (when (setq doc (cdr (assoc (TeX-read-string "Please enter \ the number of the file to view, anything else to skip: ") list))) (call-process "texdoc" nil 0 nil "--just-view" doc)) ;; Exit gently if a `quit' signal is thrown. (quit nil))) (t (message "No documentation found for %s" pkg))) ;; In any case quit-and-kill the window. (when (get-buffer-window buffer) (quit-window t (get-buffer-window buffer))))) ;; Called without prefix argument: just run "texdoc --view <pkg>". ;; The folowing code to the end of `defun' used to be just ;; (message "%s" (shell-command-to-string (concat "texdoc --view " pkg))) ;; , but in some cases it blocks emacs until the user ;; quits the viewer (bug#28905). ;; (2023-01-24) Now we use `call-process' instead of ;; `start-process-shell-command'. This can introduce ;; discrepancy in the process environment, especially PATH. ;; But we need to do so to support both okular and evince. We ;; hope that it doesn't cause major problem. (if (executable-find "texdoc") ;; Recent Texdoc returns exit code 3 when it can't find the ;; specified document, according to ;; <URL:https://tug.org/texdoc/doc/texdoc.man1.pdf> (if (= (call-process "texdoc" nil nil nil "--view" pkg) 3) (message "No documentation found for %s" pkg)) (message "texdoc not found"))))))