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-i (display-string)
40 (insert (propertize display-string 'face '(foreground-color . "white")))
43 (defun elopher-format-0 (display-string selector hostname port)
44 (elopher-type-margin "T")
46 (elopher-make-clickable display-string
47 `(lambda () (interactive)
48 (elopher-get-text ,hostname ,port ,selector))
49 (format "open \"%s\" on %s port %s"
50 selector hostname port))
51 'face '(foreground-color . "gray")))
54 (defun elopher-format-1 (display-string selector hostname port)
55 (elopher-type-margin "/")
57 (elopher-make-clickable display-string
58 `(lambda () (interactive)
59 (elopher-get-index ,hostname ,port ,selector))
60 (format "follow link to \"%s\" on %s port %s"
61 selector hostname port))
62 'face '(foreground-color . "cyan")))
65 (defun elopher-process-record (line)
66 (let* ((type (elt line 0))
67 (fields (split-string (substring line 1) "\t"))
68 (g-display-string (elt fields 0))
69 (g-selector (elt fields 1))
70 (g-hostname (elt fields 2))
71 (g-port (elt fields 3)))
73 (?i (elopher-format-i g-display-string))
74 (?0 (elopher-format-0 g-display-string g-selector g-hostname g-port))
75 (?1 (elopher-format-1 g-display-string g-selector g-hostname g-port)))))
77 (defvar elopher-incomplete-record "")
79 (defun elopher-process-complete-records (string)
80 (let* ((til-now (string-join (list elopher-incomplete-record string)))
81 (lines (split-string til-now "\r\n")))
82 (dotimes (idx (length lines))
83 (if (< idx (- (length lines) 1))
84 (elopher-process-record (elt lines idx))
85 (setq elopher-incomplete-record (elt lines idx))))))
87 (defun elopher-index-filter (proc string)
88 (with-current-buffer (get-buffer "*elopher*")
89 (let ((marker (process-mark proc)))
90 (if (not (marker-position marker))
91 (set-marker marker 0 (current-buffer)))
94 (elopher-process-complete-records string)
95 (set-marker marker (point))))))
97 (defun elopher-get-index (host &optional port path)
98 (switch-to-buffer "*elopher*")
100 (make-network-process
101 :name "elopher-process"
103 :service (if port port 70)
104 :filter #'elopher-index-filter)
105 (process-send-string "elopher-process" (concat path "\n")))
107 (defun elopher-text-filter (proc string)
108 (with-current-buffer (get-buffer "*elopher*")
109 (let ((marker (process-mark proc)))
110 (if (not (marker-position marker))
111 (set-marker marker 0 (current-buffer)))
115 (set-marker marker (point))))))
117 (defun elopher-get-text (host port selector)
118 (switch-to-buffer "*elopher*")
120 (make-network-process
121 :name "elopher-process"
124 :filter #'elopher-text-filter)
125 (process-send-string "elopher-process" (concat selector "\n")))
128 "Start gopher client."
130 (elopher-get-index (read-from-minibuffer "Gopher host: ") 70))
132 (elopher-get-index "cosmic.voyage")
133 ;; (elopher-get-index "gopher.floodgap.com")
134 ;; (elopher-get-index "maurits.id.au")
136 (defun elopher-quit ()
138 (kill-buffer "*elopher*"))
140 ;;; elopher.el ends here