blob: 5c90cabb89185b75a634eb5fc6ee52c8b4746bde (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
|
;;; file-complete-root-relative.el --- Completion style for files -*- lexical-binding:t -*-
;;
;; Copyright (C) 2019 Free Software Foundation, Inc.
;;
;; Author: Stephen Leake <stephen_leake@stephe-leake.org>
;; Maintainer: Stephen Leake <stephen_leake@stephe-leake.org>
;;
;; This file is part of GNU Emacs.
;;
;; GNU Emacs 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.
;;
;; GNU Emacs 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 GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
;;; Commentary
;; A file completion style in which the root directory is left out of
;; the completion string displayed to the user.
;;
;; We accomplish this by preprocessing the list of absolute file names
;; to be in that style, in an alist with the original absolute file
;; names, and do completion on that alist.
(require 'cl-lib)
(defun fc-root-rel-to-alist (root files)
"Return a file-root-rel alist with file names from FILES.
Result is a list (REL-NAME . ABS-NAME), where REL-NAME is ABS-NAME with ROOT deleted.
An error is signaled if any name in FILES does not begin with ROOT."
(let ((root-len (length root))
result)
(mapc
(lambda (abs-name)
(unless (string-equal root (substring abs-name 0 root-len))
(error "%s does not begin with %s" abs-name root))
(push (cons (substring abs-name root-len) abs-name) result))
files)
result))
(defun fc-root-rel-completion-table (files string pred action)
"Implement a completion table for file names in FILES,
FILES is a list of (REL-NAME . ABS-NAME).
STRING, PRED, ACTION are completion table arguments."
(cond
((eq action 'alist)
(cdr (assoc string files)))
((eq (car-safe action) 'boundaries)
;; We don't use boundaries; return the default definition.
(cons 'boundaries
(cons 0 (length (cdr action)))))
((eq action 'metadata)
(cons 'metadata
(list
'(alist . t)
'(category . project-file))))
((null action)
(try-completion string files pred))
((eq 'lambda action)
(test-completion string files pred))
((eq t action)
(all-completions string files pred))
))
(provide 'file-complete-root-relative)
;;; file-complete-root-relative.el ends here
|
