In Windows, both find-file and helm-find-file don't work if there's space in the file name. For example:
I move cursor to the anywhere in the string "c:/a/b.yaml", and then call find-file (C-x C-f), press RET, then Emacs will open the file.
but this doesn't work for "c:/a/b c/d.yaml", note the space in path, find-file will only manage to find the directory c:/a ....
If there a configurable variable or work round for this issue?
It is not implemented in Emacs yet as far as I know.
The following lisp code advices ffap-string-at-point such that it returns the string text at point if point is inside a string.
That modification lets find-file-at-point propose the full string text as initial input for the file name.
MS-Windows file names with drive letters are wrongly detected as url's if the value of the variable ffap-lax-url is non-nil. In that case find-file-at-point gives c:/Program as initial input if point is within Program of the string "c:/Program Files". So it may be that you need to set ffap-lax-url to nil.
The advice relies on the syntax parser (syntax-ppss) of emacs. That works on all major modes with syntactic fontification.
(require 'subr-x) ;; for `when-let'
;; You can also use `thingatpt+.el' instead.
(defun bounds-of-string-at-point ()
"String at point including the string delimiters."
(when-let ((ppss (syntax-ppss))
(in-string (nth 3 ppss))
(b (nth 8 ppss))
(e-ppss (save-excursion (parse-partial-sexp (1+ b) (point-max) nil nil nil 'syntax-table)))
(e (1+ (nth 8 e-ppss))))
(cons b e)))
(put 'string 'bounds-of-thing-at-point #'bounds-of-string-at-point)
(defun around-ad-ffap-string-at-point (oldfun &optional mode)
"Use the string at point for `ffap-string-at-point'
or the original function if we are not within a string."
(let ((str-bounds (bounds-of-thing-at-point 'string)))
(if str-bounds
(setq ffap-string-at-point
(buffer-substring-no-properties
(setcar ffap-string-at-point-region (1+ (car str-bounds)))
(setcar (cdr ffap-string-at-point-region) (1- (cdr str-bounds)))))
(funcall oldfun mode))))
(advice-add 'ffap-string-at-point :around #'around-ad-ffap-string-at-point)
-Qoption?-Qflag. If you can't, it means there is something in your configuration causing the problem.