;;; Code:
;; (defvar elopher-mode-map nil "Keymap for gopher client.")
-;; (define-key elopher-mode-map (kbd "p") 'elopher-quit)
;; (define-derived-mode elopher-mode special-mode "elopher"
;; "Major mode for elopher, an elisp gopher client.")
-(defun )
+(defvar elopher-margin-width 5)
-(defun elopher-filter (proc string)
+(defun elopher-insert-margin (&optional type-name)
+ (if type-name
+ (insert (propertize
+ (format (concat "%" (number-to-string elopher-margin-width) "s")
+ (concat "[" type-name "] "))
+ 'face '(foreground-color . "yellow")))
+ (insert (make-string elopher-margin-width ?\s))))
+
+(defun elopher-follow-index-link (button)
+ (apply #'elopher-get-index (button-get button 'link-address)))
+
+(defun elopher-follow-text-link (button)
+ (apply #'elopher-get-text (button-get button 'link-address)))
+
+(defun elopher-follow-image-link (button)
+ (apply #'elopher-get-image (button-get button 'link-address)))
+
+(defun elopher-process-record (line)
+ (let* ((type (elt line 0))
+ (fields (split-string (substring line 1) "\t"))
+ (display-string (elt fields 0))
+ (selector (elt fields 1))
+ (hostname (elt fields 2))
+ (port (elt fields 3))
+ (address (list selector hostname port)))
+ (pcase type
+ (?i (elopher-insert-margin)
+ (insert (propertize display-string
+ 'face '(foreground-color. "white"))))
+ (?0 (elopher-insert-margin "T")
+ (insert-text-button display-string
+ 'face '(foreground-color . "gray")
+ 'link-address address
+ 'action #'elopher-follow-text-link
+ 'follow-link t))
+ (?1 (elopher-insert-margin "/")
+ (insert-text-button display-string
+ 'face '(foreground-color . "cyan")
+ 'link-address address
+ 'action #'elopher-follow-index-link
+ 'follow-link t))
+ (?p (elopher-insert-margin "img")
+ (insert-text-button display-string
+ 'face '(foreground-color . "gray")
+ 'link-address address
+ 'action #'elopher-follow-image-link
+ 'follow-link t))
+ (?.) ; Occurs at end of index, can safely ignore.
+ (tp (elopher-insert-margin (concat (char-to-string tp) "?"))
+ (insert (propertize display-string
+ 'face '(foreground-color . "red")))))
+ (insert "\n")))
+
+(defvar elopher-incomplete-record "")
+
+(defun elopher-process-complete-records (string)
+ (let* ((til-now (string-join (list elopher-incomplete-record string)))
+ (lines (split-string til-now "\r\n")))
+ (dotimes (idx (length lines))
+ (if (< idx (- (length lines) 1))
+ (let ((line (elt lines idx)))
+ (unless (string-empty-p line)
+ (elopher-process-record line)))
+ (setq elopher-incomplete-record (elt lines idx))))))
+
+(defun elopher-index-filter (proc string)
(with-current-buffer (get-buffer "*elopher*")
(let ((marker (process-mark proc)))
(if (not (marker-position marker))
(set-marker marker 0 (current-buffer)))
(save-excursion
(goto-char marker)
- (insert (propertize string 'face '(foreground-color . "magenta")))
+ (elopher-process-complete-records string)
(set-marker marker (point))))))
-(defun elopher-get-index (host &optional port path)
- (switch-to-buffer-other-window "*elopher*")
+(defun elopher-get-index (selector host port)
+ (switch-to-buffer "*elopher*")
(erase-buffer)
+ (setq elopher-incomplete-record "")
(make-network-process
:name "elopher-process"
:host host
:service (if port port 70)
- :filter #'elopher-filter)
- (process-send-string "elopher-process" (format "%s\n" (if path path ""))))
+ :filter #'elopher-index-filter)
+ (process-send-string "elopher-process" (concat selector "\n")))
-(defun elopher ()
- "Start gopher client."
- (interactive)
- (elopher-get-index (read-from-minibuffer "Gopher host: ") 70))
+(defun elopher-text-filter (proc string)
+ (with-current-buffer (get-buffer "*elopher*")
+ (let ((marker (process-mark proc)))
+ (if (not (marker-position marker))
+ (set-marker marker 0 (current-buffer)))
+ (save-excursion
+ (goto-char marker)
+ (dolist (line (split-string string "\r"))
+ (insert line))
+ (set-marker marker (point))))))
+
+(defun elopher-get-text (selector host port)
+ (switch-to-buffer "*elopher*")
+ (erase-buffer)
+ (make-network-process
+ :name "elopher-process"
+ :host host
+ :service port
+ :filter #'elopher-text-filter)
+ (process-send-string "elopher-process" (concat selector "\n")))
-(elopher-get-index "cosmic.voyage")
+(defvar elopher-image-buffer "")
-(format "%s\n" nil)
+(defun elopher-image-filter (proc string)
+ (setq elopher-image-buffer (concat elopher-image-buffer string)))
-(delete-process "elopher-process")
-
- ;; (address (read-from-minibuffer "Address of gopher server: ")))
- ;; (message "Connecting to '%s' ..." address)
- ;; (erase-buffer)
- ;; (insert (propertize "Hello, world." 'face '(foreground-color . "red")))
- ;; (newline)
- ;; (insert (propertize "Hello, Tim." 'face '(foreground-color . "yellow"))))
+(defun elopher-get-image (selector host port)
+ (switch-to-buffer "*elopher*")
+ (erase-buffer)
+ (setq elopher-image-buffer "")
+ (make-network-process
+ :name "elopher-process"
+ :host host
+ :service port
+ :filter #'elopher-image-filter)
+ (process-send-string "elopher-process" (concat selector "\n"))
+ (insert-image (create-image elopher-image-buffer)))
-(defun elopher-quit ()
+(defun elopher ()
+ "Start gopher client."
(interactive)
- (kill-buffer "*elopher*"))
+ (elopher-get-index "" (read-from-minibuffer "Gopher host: ") 70))
-(start-process "ls" "*elopher*" "/bin/date")
+(elopher-get-index "" "cosmic.voyage" 70)
+;; (elopher-get-image "/fun/xkcd/comics/2130/2137/text_entry.png" "gopher.floodgap.com" 70)
;;; elopher.el ends here
-
-(list-processes)