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 (defvar elopher-history '())
21 (defun elopher-type-margin (&optional type-name)
24 (format (concat "%" (number-to-string elopher-type-margin-width) "s")
25 (concat "[" type-name "] "))
26 'face '(foreground-color . "yellow")))
27 (insert (make-string elopher-type-margin-width ?\s))))
29 (defun elopher-make-clickable (string link-function mouse-help)
30 (let ((map (make-sparse-keymap)))
31 (define-key map [mouse-1] link-function)
32 (define-key map (kbd "RET") link-function)
34 'mouse-face 'highlight
35 'help-echo (concat "mouse-1: " mouse-help)
38 (defun elopher-format-record (margin-key color &optional getter)
39 (elopher-type-margin margin-key)
42 (elopher-make-clickable display-string
43 `(lambda () (interactive)
44 (,getter ,hostname ,port ,selector))
45 (format "open \"%s\" on %s port %s"
46 selector hostname port))
48 'face `(foreground-color . ,color)))
51 (defun elopher-format-i (display-string)
52 (elopher-format-record nil "white"))
54 (defun elopher-format-0 (display-string selector hostname port)
55 (elopher-format-record "T" "gray" 'elopher-get-text))
57 (defun elopher-format-1 (display-string selector hostname port)
58 (elopher-format-record "/" "cyan" 'elopher-get-index))
60 (defun elopher-process-record (line)
61 (let* ((type (elt line 0))
62 (fields (split-string (substring line 1) "\t"))
63 (g-display-string (elt fields 0))
64 (g-selector (elt fields 1))
65 (g-hostname (elt fields 2))
66 (g-port (elt fields 3)))
68 (?i (elopher-format-i g-display-string))
69 (?0 (elopher-format-0 g-display-string g-selector g-hostname g-port))
70 (?1 (elopher-format-1 g-display-string g-selector g-hostname g-port)))))
72 (defvar elopher-incomplete-record "")
74 (defun elopher-process-complete-records (string)
75 (let* ((til-now (string-join (list elopher-incomplete-record string)))
76 (lines (split-string til-now "\r\n")))
77 (dotimes (idx (length lines))
78 (if (< idx (- (length lines) 1))
79 (elopher-process-record (elt lines idx))
80 (setq elopher-incomplete-record (elt lines idx))))))
82 (defun elopher-index-filter (proc string)
83 (with-current-buffer (get-buffer "*elopher*")
84 (let ((marker (process-mark proc)))
85 (if (not (marker-position marker))
86 (set-marker marker 0 (current-buffer)))
89 (elopher-process-complete-records string)
90 (set-marker marker (point))))))
92 (defun elopher-get-index (host &optional port path)
93 (switch-to-buffer "*elopher*")
95 (setq elopher-incomplete-record "")
97 :name "elopher-process"
99 :service (if port port 70)
100 :filter #'elopher-index-filter)
101 (process-send-string "elopher-process" (concat path "\n")))
103 (defun elopher-text-filter (proc string)
104 (with-current-buffer (get-buffer "*elopher*")
105 (let ((marker (process-mark proc)))
106 (if (not (marker-position marker))
107 (set-marker marker 0 (current-buffer)))
110 (dolist (line (split-string string "\r"))
112 (set-marker marker (point))))))
114 (defun elopher-get-text (host port selector)
115 (switch-to-buffer "*elopher*")
117 (setq elopher-incomplete-record "")
118 (make-network-process
119 :name "elopher-process"
122 :filter #'elopher-text-filter)
123 (process-send-string "elopher-process" (concat selector "\n")))
126 "Start gopher client."
128 (elopher-get-index (read-from-minibuffer "Gopher host: ") 70))
130 ;; (elopher-get-index "cosmic.voyage")
131 (elopher-get-index "gopher.floodgap.com")
132 ;; (elopher-get-index "maurits.id.au")
134 (defun elopher-quit ()
136 (kill-buffer "*elopher*"))
138 ;;; elopher.el ends here