"A simple gopher client."
:group 'applications)
-
(defcustom elopher-index-face '(foreground-color . "cyan")
"Face used for index records.")
(defcustom elopher-text-face '(foreground-color . "white")
"Face used for image records.")
(defcustom elopher-unknown-face '(foreground-color . "red")
"Face used for unknown record types.")
-(defcustom elopher-margin-face '(foreground-color . "orange")
- "Face used for record margin legend.")
+
+;;; Model
+;;
+
+(defun elopher-make-node (parent address &optional content)
+ (list parent address cache))
+
+(defun elopher-node-parent (node)
+ (car node))
+
+(defun elopher-node-address (node)
+ (cadr node))
+
+(defun elopher-node-content (node)
+ (caddr node))
+
+(defun elopher-reload-node (node after)
+ ())
;;; Global constants
;;
(defconst elopher-margin-width 6
"Width of left-hand margin used when rendering indicies.")
-(defvar elopher-start-page
+(defconst elopher-start-page
(concat "i\tfake\tfake\t1\r\n"
"i--------------------------------------------\tfake\tfake\t1\r\n"
"i Elopher Gopher Client \tfake\tfake\t1\r\n"
"iTest entries:\tfake\tfake\t1\r\n"
"pXKCD comic image\t/fun/xkcd/comics/2130/2137/text_entry.png\tgopher.floodgap.com\t70\r\n"))
-
;;; Mode and keymap
;;
-(defvar elopher-mode-map
+(setq elopher-mode-map
(let ((map (make-sparse-keymap)))
(define-key map (kbd "<tab>") 'elopher-next-link)
(define-key map (kbd "<S-tab>") 'elopher-prev-link)
- (define-key map (kbd "u") 'elopher-history-back)
+ (define-key map (kbd "u") 'elopher-pop-history)
(define-key map (kbd "g") 'elopher-go)
+ (define-key map (kbd "r") 'elopher-reload)
(when (require 'evil nil t)
(evil-define-key 'normal map
(kbd "C-]") 'elopher-follow-closest-link
- (kbd "C-t") 'elopher-history-back
- (kbd "u") 'elopher-history-back
- (kbd "g") 'elopher-go))
- map)
- "Keymap for gopher client.")
+ (kbd "C-t") 'elopher-pop-history
+ (kbd "u") 'elopher-pop-history
+ (kbd "g") 'elopher-go
+ (kbd "r") 'elopher-reload))
+ map))
+ ;; "Keymap for gopher client.")
(define-derived-mode elopher-mode special-mode "elopher"
"Major mode for elopher, an elisp gopher client.")
;;; Index rendering
;;
+(defun elopher-insert-index (string)
+ "Inserts the index corresponding to STRING into the current buffer."
+ (dolist (line (split-string string "\r\n"))
+ (elopher-insert-index-record line)))
+
(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 elopher-margin-face))
+ (insert (format (concat "%" (number-to-string elopher-margin-width) "s"
+ (concat
+ (propertize "[" 'face '(foreground-color . "blue"))
+ (propertize type-name 'face '(foreground-color . "white"))
+ (propertize "]" 'face '(foreground-color . "blue"))))))
(insert (make-string elopher-margin-width ?\s))))
-(defun elopher-render-record (line)
+(defun elopher-insert-index-record (line)
+ "Inserts the index record corresponding to LINE into the current buffer."
(let* ((type (elt line 0))
(fields (split-string (substring line 1) "\t"))
(display-string (elt fields 0))
'face elopher-unknown-face))))
(insert "\n")))
-(defvar elopher-incomplete-record "")
-
-(defun elopher-render-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-render-record line)))
- (setq elopher-incomplete-record (elt lines idx))))))
-
-
;;; History management
;;
(defvar elopher-history nil
"List of pages in elopher history.")
+(defvar elopher-place-history nil
+ "List of objects describing how to access pages in history.")
+
+(defvar elopher-current-place nil
+ "How to access current page.")
+
(defun elopher-push-history ()
"Add current contents of buffer, including point, to history."
(unless (string-empty-p (buffer-string))
(push
(list (buffer-string)
(point))
- elopher-history)))
+ elopher-history)
+ (push
+ elopher-current-place
+ elopher-place-history)))
(defun elopher-pop-history ()
"Restore most recent page from history."
(switch-to-buffer "*elopher*")
(erase-buffer)
(insert page-string)
- (goto-char page-point))
+ (goto-char page-point)
+ (setq elopher-current-place (pop elopher-place-history)))
(message "Already at start of history."))
(message "No elopher buffer found.")))
;;; Selector retrieval (all kinds)
;;
-
(defun elopher-get-selector (selector host port filter &optional sentinel)
(switch-to-buffer "*elopher*")
(elopher-mode)
#'elopher-image-filter
#'elopher-image-sentinel))
+;; Start page retrieval
+
+(defun elopher-get-start-page (&optional selector host port)
+ "Display start page. SELECTOR, HOST and PORT are unused."
+ (let ((inhibit-read-only t))
+ (erase-buffer)
+ (save-excursion
+ (elopher-render-complete-records elopher-start-page))))
;;; Navigation methods
;;
(backward-button 1))
(defun elopher-click-link (button)
- (apply (button-get button 'link-getter) (button-get button 'link-address)))
+ (apply (button-get button 'link-getter) (button-get button 'link-address))
+ (setq elopher-current-place (list link-getter link-address)))
(defun elopher-follow-closest-link ()
(interactive)
(defun elopher-go ()
"Go to a particular gopher site."
(interactive)
- (elopher-get-index "" (read-from-minibuffer "Gopher host: ") 70))
+ (let* ((selector "")
+ (hostname (read-from-minibuffer "Gopher host: "))
+ (port 70)
+ (address (list selector hostname port)))
+ (elopher-get-index "" (read-from-minibuffer "Gopher host: ") 70)i
+ (setq elopher-current-place (list #'elopher-get-index address))))
+(defun elopher-reload ()
+ "Reload current page."
+ (interactive)
+ (if elopher-current-place
+ (let ((link-getter (car elopher-current-place))
+ (address (cadr elopher-current-place)))
+ (apply link-getter address))
+ (elopher-get-start-page)))
;;; Main start procedure
;;
(switch-to-buffer "*elopher*")
(elopher-mode)
(setq elopher-history nil)
- (let ((inhibit-read-only t))
- (erase-buffer)
- (save-excursion
- (elopher-render-complete-records elopher-start-page))))
+ (setq elopher-place-history nil)
+ (setq elopher-current-place nil)
+ (elopher-get-start-page))
;;; elopher.el ends here
The Lambda Lab / projects / elpher.git / blobdiff