;; Author: Tim Vaughan <tgvaughan@gmail.com>
;; Created: 11 April 2019
-;; Version: 1.2.0
+;; Version: 1.2.4
;; Keywords: comm gopher
;; Homepage: https://github.com/tgvaughan/elpher
;; Package-Requires: ((emacs "25"))
;;; Global constants
;;
-(defconst elpher-version "1.2.0"
+(defconst elpher-version "1.2.4"
"Current version of elpher.")
(defconst elpher-margin-width 6
"Source for elpher start page.")
(defconst elpher-type-map
- '((?0 elpher-get-text-node "T" elpher-text)
+ '((?0 elpher-get-text-node "txt" elpher-text)
(?1 elpher-get-index-node "/" elpher-index)
- (?4 elpher-get-node-download "B" elpher-binary)
- (?5 elpher-get-node-download "B" elpher-binary)
+ (?4 elpher-get-node-download "bin" elpher-binary)
+ (?5 elpher-get-node-download "bin" elpher-binary)
(?7 elpher-get-search-node "?" elpher-search)
- (?8 elpher-get-telnet-node "?" elpher-telnet)
- (?9 elpher-get-node-download "B" elpher-binary)
- (?g elpher-get-image-node "im" elpher-image)
- (?p elpher-get-image-node "im" elpher-image)
- (?I elpher-get-image-node "im" elpher-image)
- (?d elpher-get-node-download "d" elpher-binary)
- (?h elpher-get-url-node "W" elpher-url)
+ (?8 elpher-get-telnet-node "tel" elpher-telnet)
+ (?9 elpher-get-node-download "bin" elpher-binary)
+ (?g elpher-get-image-node "img" elpher-image)
+ (?p elpher-get-image-node "img" elpher-image)
+ (?I elpher-get-image-node "img" elpher-image)
+ (?d elpher-get-node-download "doc" elpher-binary)
+ (?h elpher-get-url-node "web" elpher-url)
(bookmarks elpher-get-bookmarks-node "#" elpher-index)
(start elpher-get-start-node "#" elpher-index))
"Association list from types to getters, margin codes and index faces.")
;; Node
-(defun elpher-make-node (display-string parent address)
+(defun elpher-make-node (display-string address &optional parent)
"Create a node in the gopher page hierarchy.
DISPLAY-STRING records the display string used for the page.
-PARENT specifies the parent of the node, and ADDRESS specifies the
-address of the gopher page."
- (list display-string parent address))
+ADDRESS specifies the address of the gopher page.
+
+The optional PARENT specifies the parent node in the hierarchy.
+This is set every time the node is visited, so while it forms
+an important part of the node data there is no need to set it
+initially."
+ (list display-string address parent))
(defun elpher-node-display-string (node)
"Retrieve the display string of NODE."
(elt node 0))
-(defun elpher-node-parent (node)
- "Retrieve the parent node of NODE."
- (elt node 1))
-
(defun elpher-node-address (node)
"Retrieve the address of NODE."
+ (elt node 1))
+
+(defun elpher-node-parent (node)
+ "Retrieve the parent node of NODE."
(elt node 2))
+(defun elpher-set-node-parent (node parent)
+ "Set the parent node of NODE to be PARENT."
+ (setcar (cdr (cdr node)) parent))
+
;; Cache
(defvar elpher-content-cache (make-hash-table :test 'equal))
(defvar elpher-current-node nil)
-(defun elpher-visit-node (node &optional getter)
- "Visit NODE using its own getter or GETTER, if non-nil."
+(defun elpher-visit-node (node &optional getter preserve-parent)
+ "Visit NODE using its own getter or GETTER, if non-nil.
+Additionally, set the parent of NODE to `elpher-current-node',
+unless PRESERVE-PARENT is non-nil."
(elpher-save-pos)
(elpher-process-cleanup)
+ (unless preserve-parent
+ (if (and (elpher-node-parent elpher-current-node)
+ (equal (elpher-node-address elpher-current-node)
+ (elpher-node-address node)))
+ (elpher-set-node-parent node (elpher-node-parent elpher-current-node))
+ (elpher-set-node-parent node elpher-current-node)))
(setq elpher-current-node node)
(if getter
(funcall getter)
"Visit the parent of the current node."
(let ((parent-node (elpher-node-parent elpher-current-node)))
(when parent-node
- (elpher-visit-node parent-node))))
+ (elpher-visit-node parent-node nil t))))
(defun elpher-reload-current-node ()
"Reload the current node, discarding any existing cached content."
(if type-map-entry
(let* ((margin-code (elt type-map-entry 1))
(face (elt type-map-entry 2))
- (node (elpher-make-node display-string elpher-current-node address)))
+ (node (elpher-make-node display-string address)))
(elpher-insert-margin margin-code)
(insert-text-button display-string
'face face
"\\([a-zA-Z]+\\)://\\([a-zA-Z0-9.\-]+\\)\\(?3::[0-9]+\\)?\\(?4:/[^ \r\n\t(),]*\\)?"
"Regexp used to locate and buttinofy URLs in text files loaded by elpher.")
-(defun elpher-make-node-from-matched-url (parent &optional string)
+(defun elpher-make-node-from-matched-url (&optional string)
"Convert most recent `elpher-url-regex' match to a node.
-PARENT defines the node to set as the parent to the new node.
-
If STRING is non-nil, this is given as an argument to all `match-string'
calls, as is necessary if the match is performed by `string-match'."
(let ((url (match-string 0 string))
(substring type-and-selector 2)
""))
(address (elpher-make-address type selector host port)))
- (elpher-make-node url elpher-current-node address))
+ (elpher-make-node url address))
(let* ((host (match-string 2 string))
(port (if (> (length (match-string 3 string)) 1)
(string-to-number (substring (match-string 3 string) 1))
70))
(selector (concat "URL:" url))
(address (elpher-make-address ?h selector host port)))
- (elpher-make-node url elpher-current-node address)))))
+ (elpher-make-node url address)))))
(defun elpher-buttonify-urls (string)
(insert string)
(goto-char (point-min))
(while (re-search-forward elpher-url-regex nil t)
- (let ((node (elpher-make-node-from-matched-url elpher-current-node)))
+ (let ((node (elpher-make-node-from-matched-url)))
(make-text-button (match-beginning 0)
(match-end 0)
'elpher-node node
(let ((node
(let ((host-or-url (read-string "Gopher host or URL: ")))
(if (string-match elpher-url-regex host-or-url)
- (elpher-make-node-from-matched-url elpher-current-node
- host-or-url)
+ (elpher-make-node-from-matched-url host-or-url)
(let ((selector (read-string "Selector (default none): " nil nil ""))
(port-string (read-string "Port (default 70): " nil nil "70")))
(elpher-make-node (concat "gopher://" host-or-url
":" port-string
"/1" selector)
- elpher-current-node
(elpher-make-address ?1 selector host-or-url
(string-to-number port-string))))))))
(switch-to-buffer "*elpher*")
(elpher-make-node (concat "gopher://" host
":" (number-to-string port)
"/1/")
- elpher-current-node
root-address)))
(error "Already at root directory of current server")))
(error "Command invalid for this page"))))
(interactive)
(switch-to-buffer "*elpher*")
(elpher-visit-node
- (elpher-make-node "Bookmarks"
- elpher-current-node
- (elpher-make-address 'bookmarks))))
+ (elpher-make-node "Bookmarks" (elpher-make-address 'bookmarks))))
(defun elpher-info-node (node)
"Display information on NODE."
(defun elpher-get-address-url (address)
"Get URL representation of ADDRESS."
- (concat "gopher://"
- (elpher-address-host address)
- (let ((port (elpher-address-port address)))
- (if (equal port 70)
- ""
- (format ":%d" port)))
- "/" (string (elpher-address-type address))
- (elpher-address-selector address)))
+ (let ((type (elpher-address-type address))
+ (selector (elpher-address-selector address))
+ (host (elpher-address-host address))
+ (port (elpher-address-port address)))
+ (if (and (equal type ?h)
+ (string-prefix-p "URL:" selector))
+ (elt (split-string selector "URL:") 1)
+ (concat "gopher://"
+ host
+ (if (equal port 70)
+ ""
+ (format ":%d" port))
+ "/" (string type)
+ selector))))
(defun elpher-copy-node-url (node)
"Copy URL representation of address of NODE to `kill-ring'."
(switch-to-buffer "*elpher*")
(switch-to-buffer "*elpher*")
(setq elpher-current-node nil)
- (let ((start-node (elpher-make-node "Elpher Start Page" nil (elpher-make-address 'start))))
+ (let ((start-node (elpher-make-node "Elpher Start Page"
+ (elpher-make-address 'start))))
(elpher-visit-node start-node)))
"Started Elpher.") ; Otherwise (elpher) evaluates to start page string.
The Lambda Lab / projects / elpher.git / blobdiff