1 ;;; elopher.el --- gopher client
5 ;; Simple gopher client in elisp.
9 ;; (defvar elopher-mode-map nil "Keymap for gopher client.")
10 ;; (define-key elopher-mode-map (kbd "p") 'elopher-quit)
12 ;; (define-derived-mode elopher-mode special-mode "elopher"
13 ;; "Major mode for elopher, an elisp gopher client.")
15 ;; (global-set-key (kbd "C-c C-b") 'eval-buffer)
17 (defvar elopher-type-margin-width 5)
19 (defun elopher-type-margin (&optional type-name)
22 (format (concat "%" (number-to-string elopher-type-margin-width) "s")
23 (concat "[" type-name "] "))
24 'face '(foreground-color . "yellow")))
25 (insert (make-string elopher-type-margin-width ?\s))))
27 (defun elopher-format-i (display-string)
29 (insert (propertize display-string 'face '(foreground-color . "white")))
32 (defun elopher-format-0 (display-string selector hostname port)
33 (elopher-type-margin "T")
34 (insert (propertize display-string 'face '(foreground-color . "gray")))
37 (defun elopher-format-1 (display-string selector hostname port)
38 (elopher-type-margin "/")
39 (let ((map (make-sparse-keymap)))
40 (define-key map [mouse-1]
41 (eval `(lambda () (interactive) (elopher-get-index ,hostname ,port ,selector))))
42 (insert (propertize display-string
43 'face '(foreground-color . "cyan")
44 'mouse-face 'highlight
45 'help-echo (format "mouse-1: follow link to \"%s\" on %s port %s"
46 selector hostname port)
50 (defun elopher-process-record (line)
51 (let* ((type (elt line 0))
52 (fields (split-string (substring line 1) "\t"))
53 (g-display-string (elt fields 0))
54 (g-selector (elt fields 1))
55 (g-hostname (elt fields 2))
56 (g-port (elt fields 3)))
58 (?i (elopher-format-i g-display-string))
59 (?0 (elopher-format-0 g-display-string g-selector g-hostname g-port))
60 (?1 (elopher-format-1 g-display-string g-selector g-hostname g-port)))))
62 (defvar elopher-incomplete-record "")
64 (defun elopher-process-complete-records (string)
65 (let* ((til-now (string-join (list elopher-incomplete-record string)))
66 (lines (split-string til-now "\r\n")))
67 (dotimes (idx (length lines))
68 (if (< idx (- (length lines) 1))
69 (elopher-process-record (elt lines idx))
70 (setq elopher-incomplete-record (elt lines idx))))))
72 (defun elopher-filter (proc string)
73 (with-current-buffer (get-buffer "*elopher*")
74 (let ((marker (process-mark proc)))
75 (if (not (marker-position marker))
76 (set-marker marker 0 (current-buffer)))
79 (elopher-process-complete-records string)
80 (set-marker marker (point))))))
82 (defun elopher-get-index (host &optional port path)
83 (switch-to-buffer "*elopher*")
86 :name "elopher-process"
88 :service (if port port 70)
89 :filter #'elopher-filter)
90 (process-send-string "elopher-process" (concat path "\n")))
93 "Start gopher client."
95 (elopher-get-index (read-from-minibuffer "Gopher host: ") 70))
97 ;; (elopher-get-index "cosmic.voyage")
98 (elopher-get-index "gopher.floodgap.com")
99 ;; (elopher-get-index "maurits.id.au")
101 (defun elopher-quit ()
103 (kill-buffer "*elopher*"))
105 ;;; elopher.el ends here