(defconst elopher-margin-width 6
"Width of left-hand margin used when rendering indicies.")
-(defconst elopher-start-page
+(defconst elopher-start-index
(string-join
(list "i\tfake\tfake\t1"
"i--------------------------------------------\tfake\tfake\t1"
(defun elopher-restore-pos ()
(let ((pos (elopher-node-pos elopher-current-node)))
(if pos
- (goto-char (elopher-node-pos elopher-current-node))
+ (goto-char pos)
(goto-char (point-min)))))
;; Node graph traversal
-(defvar elopher-start-node (elopher-make-node nil nil #'elopher-get-index-node))
(defvar elopher-current-node)
(defun elopher-visit-node (node)
(defun elopher-visit-parent-node ()
(let ((parent-node (elopher-node-parent elopher-current-node)))
(when parent-node
- (setq elopher-current-node parent-node)
- (elopher-visit-node elopher-current-node))))
+ (elopher-visit-node parent-node))))
(defun elopher-reload-current-node ()
(elopher-set-node-content elopher-current-node nil)
(elopher-insert-index-record line))))
(defun elopher-insert-margin (&optional type-name)
+ "Insert index margin, optionally containing the TYPE-NAME, into the current buffer."
(if type-name
(progn
(insert (format (concat "%" (number-to-string (- elopher-margin-width 1)) "s")
(let* ((type (elt line 0))
(fields (split-string (substring line 1) "\t"))
(display-string (elt fields 0))
- (address (elopher-make-address (elt fields 1) (elt fields 2) (elt fields 3))))
+ (address (elopher-make-address (elt fields 1) (elt fields 2) (elt fields 3)))
+ (help-string (format "mouse-1, RET: open %s on %s port %s"
+ (elopher-address-selector address)
+ (elopher-address-host address)
+ (elopher-address-port address))))
(pcase type
(?i (elopher-insert-margin)
(insert (propertize display-string
address
#'elopher-get-text-node)
'action #'elopher-click-link
- 'follow-link t))
+ 'follow-link t
+ 'help-echo help-string))
(?1 (elopher-insert-margin "/")
(insert-text-button display-string
'face elopher-index-face
address
#'elopher-get-index-node)
'action #'elopher-click-link
- 'follow-link t))
+ 'follow-link t
+ 'help-echo help-string))
+ ((or ?g ?p ?I) (elopher-insert-margin "im")
+ (insert-text-button display-string
+ 'face elopher-image-face
+ 'elopher-node (elopher-make-node elopher-current-node
+ address
+ #'elopher-get-image-node)
+ 'action #'elopher-click-link
+ 'follow-link t
+ 'help-echo help-string))
(?.) ; Occurs at end of index, can safely ignore.
(tp (elopher-insert-margin (concat (char-to-string tp) "?"))
(insert (propertize display-string
(defvar elopher-selector-string)
-(defun elopher-get-selector (address after)
+(defun elopher-get-selector (address after &optional binary)
+ "Retrieve selector specified by ADDRESS and store it in the
+string elopher-selector-string, then execute AFTER as the
+sentinal function."
(setq elopher-selector-string "")
(let ((p (get-process "elopher-process")))
(if p (delete-process p)))
(let ((content (elopher-node-content elopher-current-node))
(address (elopher-node-address elopher-current-node)))
(if content
- (let ((inhibit-read-only t))
- (insert content))
- (elopher-restore-pos)
+ (progn
+ (let ((inhibit-read-only t))
+ (insert content))
+ (elopher-restore-pos))
(if address
(elopher-get-selector address
(lambda (proc event)
(buffer-string))))
(progn
(let ((inhibit-read-only t))
- (elopher-insert-index elopher-start-page))
+ (elopher-insert-index elopher-start-index))
(elopher-restore-pos)
(elopher-set-node-content elopher-current-node
(buffer-string)))))))
(let ((content (elopher-node-content elopher-current-node))
(address (elopher-node-address elopher-current-node)))
(if content
- (let ((inhibit-read-only t))
- (save-excursion
- (insert content)))
+ (progn
+ (let ((inhibit-read-only t))
+ (insert content))
+ (elopher-restore-pos))
(elopher-get-selector address
(lambda (proc event)
(let ((inhibit-read-only t))
- (erase-buffer)
- (save-excursion
- (insert
- (elopher-strip-CRs elopher-selector-string))))
+ (insert (elopher-strip-CRs elopher-selector-string)))
+ (elopher-restore-pos)
(elopher-set-node-content elopher-current-node
(buffer-string)))))))
-;;; Navigation methods
+;; Image retrieval
+
+(defun elopher-get-image-node ()
+ (let ((content (elopher-node-content elopher-current-node))
+ (address (elopher-node-address elopher-current-node)))
+ (if content
+ (progn
+ (let ((inhibit-read-only t))
+ (insert-image content))
+ (elopher-restore-pos))
+ (elopher-get-selector address
+ (lambda (proc event)
+ (let ((image (create-image
+ (string-as-unibyte elopher-selector-string)
+ nil t))
+ (inhibit-read-only t))
+ (insert-image image)
+ (elopher-restore-pos)
+ (elopher-set-node-content elopher-current-node image)))))))
+
+
+
+;;; Navigation procedures
;;
(defun elopher-next-link ()
(defun elopher-back ()
"Go to previous site."
(interactive)
- (elopher-visit-parent-node))
-
-;;; Main start procedure
-;;
-(defun elopher ()
- "Start elopher with default landing page."
- (interactive)
- (setq elopher-current-node nil)
- (elopher-visit-node elopher-start-node))
+ (if (elopher-node-parent elopher-current-node)
+ (elopher-visit-parent-node)
+ (message "No previous site.")))
;;; Mode and keymap
"Major mode for elopher, an elisp gopher client.")
+;;; Main start procedure
+;;
+(defun elopher ()
+ "Start elopher with default landing page."
+ (interactive)
+ (setq elopher-current-node nil)
+ (let ((start-node (elopher-make-node nil nil #'elopher-get-index-node)))
+ (elopher-visit-node start-node)))
+
;;; elopher.el ends here