;; Copyright (C) 2021 Christopher Brannon <chris@the-brannons.com>
;; Copyright (C) 2021 Omar Polo <op@omarpolo.com>
;; Copyright (C) 2021 Noodles! <nnoodle@chiru.no>
+;; Copyright (C) 2021 Abhiseck Paira <abhiseckpaira@disroot.org>
;; Copyright (C) 2020-2021 Alex Schroeder <alex@gnu.org>
;; Copyright (C) 2020 Zhiwei Chen <chenzhiwei03@kuaishou.com>
;; Copyright (C) 2020 condy0919 <condy0919@gmail.com>
;; Author: Tim Vaughan <plugd@thelambdalab.xyz>
;; Created: 11 April 2019
-;; Version: 3.0.0
+;; Version: 3.1.0
;; Keywords: comm gopher
;; Homepage: https://thelambdalab.xyz/elpher
;; Package-Requires: ((emacs "27.1"))
;;
(require 'seq)
-(require 'pp)
(require 'shr)
(require 'url-util)
(require 'subr-x)
-(require 'dns)
(require 'nsm)
(require 'gnutls)
(require 'socks)
-
-;;; ANSI colors or XTerm colors
-
-(or (require 'xterm-color nil t)
- (require 'ansi-color))
-
-(defalias 'elpher-color-filter-apply
- (if (fboundp 'xterm-color-filter)
- (lambda (s)
- (let ((_xterm-color-render nil))
- (xterm-color-filter s)))
- #'ansi-color-filter-apply)
- "A function to filter out ANSI escape sequences.")
-
-(defalias 'elpher-color-apply
- (if (fboundp 'xterm-color-filter)
- #'xterm-color-filter
- #'ansi-color-apply)
- "A function to apply ANSI escape sequences.")
+(require 'bookmark)
;;; Global constants
;;
-(defconst elpher-version "3.0.0"
+(defconst elpher-version "3.1.0"
"Current version of elpher.")
(defconst elpher-margin-width 6
(finger elpher-get-finger-page elpher-render-text "txt" elpher-text)
(telnet elpher-get-telnet-page nil "tel" elpher-telnet)
(other-url elpher-get-other-url-page nil "url" elpher-other-url)
- ((special start) elpher-get-start-page nil "E" elpher-index)
+ (file elpher-get-file-page nil "~" elpher-gemini)
+ ((special welcome) elpher-get-welcome-page nil "E" elpher-index)
+ ((special bookmarks) elpher-get-bookmarks-page nil "E" elpher-index)
((special history) elpher-get-history-page nil "E" elpher-index)
((special visited-pages) elpher-get-visited-pages-page nil "E" elpher-index))
"Association list from types to getters, renderers, margin codes and index faces.")
(defvar ansi-color-context)
(defvar bookmark-make-record-function)
(defvar mu4e~view-beginning-of-url-regexp)
- (defvar thing-at-point-uri-schemes))
+ (defvar eww-use-browse-url)
+ (defvar thing-at-point-uri-schemes)
+ (defvar xterm-color-preserve-properties))
;;; Customization group
Otherwise, the SOCKS proxy is only used for connections to onion services."
:type '(boolean))
+(defcustom elpher-use-emacs-bookmark-menu nil
+ "If non-nil, elpher will only use the native Emacs bookmark menu.
+Otherwise, \\[elpher-show-bookmarks] will visit a special elpher bookmark
+page within which all of the standard elpher keybindings are active."
+ :type '(boolean))
+
+(defcustom elpher-start-page "about:welcome"
+ "Specify the page displayed initially by elpher.
+The default welcome screen \"about:welcome\", while the bookmarks list
+is \"about:bookmarks\". You can also specify local files via \"file:\".")
+
;; Face customizations
(defgroup elpher-faces nil
(defun elpher-make-special-address (type)
"Create an ADDRESS object corresponding to the given special address symbol TYPE."
- type)
+ (elpher-address-from-url (concat "about:" (symbol-name type))))
(defun elpher-address-to-url (address)
"Get string representation of ADDRESS, or nil if ADDRESS is special."
- (if (elpher-address-special-p address)
- nil
- (url-encode-url (url-recreate-url address))))
+ (url-encode-url (url-recreate-url address)))
(defun elpher-address-type (address)
"Retrieve type of ADDRESS object.
This is used to determine how to retrieve and render the document the
address refers to, via the table `elpher-type-map'."
- (if (symbolp address)
- (list 'special address)
- (let ((protocol (url-type address)))
- (cond ((or (equal protocol "gopher")
- (equal protocol "gophers"))
- (list 'gopher
- (if (member (url-filename address) '("" "/"))
- ?1
- (string-to-char (substring (url-filename address) 1)))))
- ((equal protocol "gemini")
- 'gemini)
- ((equal protocol "telnet")
- 'telnet)
- ((equal protocol "finger")
- 'finger)
- (t 'other-url)))))
+ (let ((protocol (url-type address)))
+ (pcase (url-type address)
+ ("about"
+ (list 'special (intern (url-filename address))))
+ ((or "gopher" "gophers")
+ (list 'gopher
+ (if (member (url-filename address) '("" "/"))
+ ?1
+ (string-to-char (substring (url-filename address) 1)))))
+ ("gemini" 'gemini)
+ ("telnet" 'telnet)
+ ("finger" 'finger)
+ ("file" 'file)
+ (_ 'other-url))))
+
+(defun elpher-address-special-p (address)
+ "Return non-nil if ADDRESS is a special address."
+ (pcase (elpher-address-type address) (`(special ,subtype) t)))
(defun elpher-address-protocol (address)
"Retrieve the transport protocol for ADDRESS. This is nil for special addresses."
- (if (symbolp address)
+ (if (elpher-address-special-p address)
nil
(url-type address)))
(defun elpher-address-port (address)
"Retrieve port from ADDRESS object.
If no address is defined, returns 0. (This is for compatibility with the URL library.)"
- (if (symbolp address)
+ (if (elpher-address-special-p address)
0
(url-port address)))
-(defun elpher-address-special-p (address)
- "Return non-nil if ADDRESS object is special (e.g. start page page)."
- (symbolp address))
-
(defun elpher-address-gopher-p (address)
"Return non-nill if ADDRESS object is a gopher address."
- (and (not (elpher-address-special-p address))
- (member (elpher-address-protocol address) '("gopher" "gophers"))))
+ (eq 'gopher (elpher-address-type address)))
(defun elpher-gopher-address-selector (address)
"Retrieve gopher selector from ADDRESS object."
(list display-string address))
(defun elpher-make-start-page ()
- "Create the start page."
- (elpher-make-page "Elpher Start Page"
- (elpher-make-special-address 'start)))
+ "Create the welcome page."
+ (elpher-make-page "Start Page"
+ (elpher-address-from-url elpher-start-page)))
(defun elpher-page-display-string (page)
"Retrieve the display string corresponding to PAGE."
(defmacro elpher-with-clean-buffer (&rest args)
"Evaluate ARGS with a clean *elpher* buffer as current."
+ (declare (debug (body))) ;; Allow edebug to step through body
`(with-current-buffer elpher-buffer-name
(unless (eq major-mode 'elpher-mode)
;; avoid resetting buffer-local variables
(elpher-decode (replace-regexp-in-string "\n\\.\n$" "\n"
(replace-regexp-in-string "\r" "" string))))
+;;; Buttonify urls
+
+(defconst elpher-url-regex
+ "\\([a-zA-Z]+\\)://\\([a-zA-Z0-9.-]*[a-zA-Z0-9-]\\|\\[[a-zA-Z0-9:]+\\]\\)\\(:[0-9]+\\)?\\(/\\([0-9a-zA-Z_~?/@|:.%#=&-]*[0-9a-zA-Z_~?/@|#-]\\)?\\)?"
+ "Regexp used to locate and buttonify URLs in text files loaded by elpher.")
+
+(defun elpher-buttonify-urls (string)
+ "Turn substrings which look like urls in STRING into clickable buttons."
+ (with-temp-buffer
+ (insert string)
+ (goto-char (point-min))
+ (while (re-search-forward elpher-url-regex nil t)
+ (let ((page (elpher-make-page (substring-no-properties (match-string 0))
+ (elpher-address-from-url (match-string 0)))))
+ (make-text-button (match-beginning 0)
+ (match-end 0)
+ 'elpher-page page
+ 'action #'elpher-click-link
+ 'follow-link t
+ 'help-echo #'elpher--page-button-help
+ 'face 'button)))
+ (buffer-string)))
+
+;;; ANSI colors or XTerm colors (application and filtering)
+
+(or (require 'xterm-color nil t)
+ (require 'ansi-color))
+
+(defalias 'elpher-color-filter-apply
+ (if (fboundp 'xterm-color-filter)
+ (lambda (s)
+ (let ((_xterm-color-render nil))
+ (xterm-color-filter s)))
+ #'ansi-color-filter-apply)
+ "A function to filter out ANSI escape sequences.")
+
+(defalias 'elpher-color-apply
+ (if (fboundp 'xterm-color-filter)
+ #'xterm-color-filter
+ #'ansi-color-apply)
+ "A function to apply ANSI escape sequences.")
+
+;;; Processing text for display
+
+(defun elpher-process-text-for-display (string)
+ "Perform any desired processing of STRING prior to display as text.
+Currently includes buttonifying URLs and processing ANSI escape codes."
+ (elpher-buttonify-urls (if elpher-filter-ansi-from-text
+ (elpher-color-filter-apply string)
+ (elpher-color-apply string))))
+
;;; Network error reporting
;;
(cancel-timer elpher-network-timer)))
(defun elpher-make-network-timer (thunk)
- "Creates a timer to run the THUNK after `elpher-connection-timeout' seconds.
+ "Create a timer to run the THUNK after `elpher-connection-timeout' seconds.
This is just a wraper around `run-at-time' which additionally sets the
buffer-local variable `elpher-network-timer' to allow
`elpher-process-cleanup' to also clear the timer."
;; Text rendering
-(defconst elpher-url-regex
- "\\([a-zA-Z]+\\)://\\([a-zA-Z0-9.-]*[a-zA-Z0-9-]\\|\\[[a-zA-Z0-9:]+\\]\\)\\(:[0-9]+\\)?\\(/\\([0-9a-zA-Z_~?/@|:.%#=&-]*[0-9a-zA-Z_~?/@|#-]\\)?\\)?"
- "Regexp used to locate and buttonify URLs in text files loaded by elpher.")
-
-(defun elpher-buttonify-urls (string)
- "Turn substrings which look like urls in STRING into clickable buttons."
- (with-temp-buffer
- (insert string)
- (goto-char (point-min))
- (while (re-search-forward elpher-url-regex nil t)
- (let ((page (elpher-make-page (substring-no-properties (match-string 0))
- (elpher-address-from-url (match-string 0)))))
- (make-text-button (match-beginning 0)
- (match-end 0)
- 'elpher-page page
- 'action #'elpher-click-link
- 'follow-link t
- 'help-echo #'elpher--page-button-help
- 'face 'button)))
- (buffer-string)))
-
-(defun elpher-process-text-for-display (string)
- "Perform any desired processing of STRING prior to display as text.
-Currently includes buttonifying URLs and processing ANSI escape codes."
- (elpher-buttonify-urls (if elpher-filter-ansi-from-text
- (elpher-color-filter-apply string)
- (elpher-color-apply string))))
-
(defun elpher-render-text (data &optional _mime-type-string)
"Render DATA as text. MIME-TYPE-STRING is unused."
(elpher-with-clean-buffer
(if (not data)
nil
(if (display-images-p)
- (progn
- (let ((image (create-image
- data
- nil t)))
- (elpher-with-clean-buffer
- (insert-image image)
- (elpher-restore-pos))))
+ (let* ((image (create-image
+ data
+ nil t))
+ (window (get-buffer-window elpher-buffer-name)))
+ (when window
+ (setf (image-property image :max-width) (window-pixel-width window))
+ (setf (image-property image :max-height) (window-pixel-height window)))
+ (elpher-with-clean-buffer
+ (insert-image image)
+ (elpher-restore-pos)))
(elpher-render-download data))))
;; Search retrieval and rendering
(let ((redirect-address (elpher-address-from-gemini-url response-meta)))
(if (member redirect-address elpher-gemini-redirect-chain)
(error "Redirect loop detected"))
- (if (not (string= (elpher-address-protocol redirect-address)
- "gemini"))
+ (if (not (eq (elpher-address-type redirect-address) 'gemini))
(error "Server tried to automatically redirect to non-gemini URL: %s"
response-meta))
(elpher-page-set-address elpher-current-page redirect-address)
(if (string-empty-p (url-filename address))
(setf (url-filename address) "/")) ;ensure empty filename is marked as absolute
(setf (url-host address) (url-host current-address))
- (setf (url-port address) (url-port current-address))
+ (setf (url-portspec address) (url-portspec current-address)) ; (url-port) too slow!
(unless (string-prefix-p "/" (url-filename address)) ;deal with relative links
(setf (url-filename address)
(concat (file-name-directory (url-filename current-address))
(error "Command not supported for general URLs"))
(let* ((address (elpher-page-address elpher-current-page))
(url (elpher-address-to-url address)))
- (progn
- (elpher-visit-previous-page) ; Do first in case of non-local exits.
- (message "Opening URL...")
- (if elpher-open-urls-with-eww
- (browse-web url)
- (browse-url url)))))
+ (elpher-visit-previous-page) ; Do first in case of non-local exits.
+ (message "Opening URL...")
+ (if elpher-open-urls-with-eww
+ (browse-web url)
+ (browse-url url))))
+;; File page
-;; Start page retrieval
-
-(defun elpher-get-start-page (renderer)
- "Getter which displays the start page (RENDERER must be nil)."
+(defun elpher-get-file-page (renderer)
+ "Getter which retrieves the contents of a local file and renders it using RENDERER."
+ (let* ((address (elpher-page-address elpher-current-page))
+ (filename (elpher-address-filename address)))
+ (unless (file-exists-p filename)
+ (elpher-visit-previous-page)
+ (error "File not found"))
+ (unless (file-readable-p filename)
+ (elpher-visit-previous-page)
+ (error "Could not read from file"))
+ (funcall
+ (if renderer
+ renderer
+ (pcase (file-name-extension filename)
+ ((or "gmi" "gemini") #'elpher-render-gemini-map)
+ ((or "htm" "html") #'elpher-render-html)
+ ((or "jpg" "jpeg" "gif" "png" "bmp" "tif" "tiff")
+ #'elpher-render-image)
+ ((or "txt" "") #'elpher-render-text)
+ (t
+ #'elpher-render-download)))
+ (with-temp-buffer
+ (let ((coding-system-for-read 'binary)
+ (coding-system-for-write 'binary))
+ (insert-file-contents-literally filename)
+ (string-as-unibyte (buffer-string))))
+ nil)))
+
+
+;; Welcome page retrieval
+
+(defun elpher-get-welcome-page (renderer)
+ "Getter which displays the welcome page (RENDERER must be nil)."
(when renderer
(elpher-visit-previous-page)
- (error "Command not supported for start page"))
+ (error "Command not supported for welcome page"))
(elpher-with-clean-buffer
(insert " --------------------------------------------\n"
" Elpher Gopher and Gemini Client \n"
(elpher-address-from-url "gemini://geminispace.info/search"))
(insert "\n"
"Your bookmarks are stored in your ")
- (let ((help-string "RET,mouse-1: Open Emacs bookmark list"))
- (insert-text-button "Emacs bookmark list"
+ (let ((help-string "RET,mouse-1: Open bookmark list"))
+ (insert-text-button "bookmark list"
'face 'link
'action (lambda (_)
(interactive)
- (call-interactively #'elpher-open-bookmarks))
+ (call-interactively #'elpher-show-bookmarks))
'follow-link t
'help-echo help-string))
(insert ".\n")
'help-echo help-string))
(insert "\n")
(insert (propertize
- (concat " (These documents should be available if you have installed Elpher \n"
- " using MELPA. Otherwise you may have to install the manual yourself.)\n")
+ (concat "(These documents should be available if you have installed Elpher \n"
+ " using MELPA. Otherwise you may have to install the manual yourself.)\n")
'face 'shadow))
(elpher-restore-pos)))
(defun elpher-display-history-links (pages title)
"Show all PAGES in an Elpher buffer with a given TITLE."
- (let* ((title-line (concat "---- " title " ----"))
+ (let* ((title-line (concat " ---- " title " ----"))
(footer-line (make-string (length title-line) ?-)))
(elpher-with-clean-buffer
(insert title-line "\n\n")
(address (elpher-page-address page)))
(elpher-insert-index-record display-string address))))
(insert "No history items found.\n"))
- (insert "\n" footer-line "\n"
- "Select and entry or press 'u' to return to the previous page.")
+ (insert "\n " footer-line "\n"
+ "Select an entry or press 'u' to return to the previous page.")
(elpher-restore-pos))))
(read-file-name "Old Elpher bookmarks: "
user-emacs-directory nil t
"elpher-bookmarks"))))
- (require 'bookmark)
(dolist (bookmark (with-temp-buffer
(insert-file-contents file)
(read (current-buffer))))
(bookmark-store display-string (cdr record) t)))
(bookmark-save))
-(defun elpher-open-bookmarks ()
+(defun elpher-get-bookmarks-page (renderer)
+ "Getter which displays the history page (RENDERER must be nil)."
+ (when renderer
+ (elpher-visit-previous-page)
+ (error "Command not supported for bookmarks page"))
+ (elpher-with-clean-buffer
+ (insert " ---- Elpher Bookmarks ---- \n\n")
+ (bookmark-maybe-load-default-file)
+ (dolist (bookmark (bookmark-maybe-sort-alist))
+ (when (eq #'elpher-bookmark-jump (alist-get 'handler (cdr bookmark)))
+ (let* ((name (car bookmark))
+ (url (alist-get 'location (cdr bookmark)))
+ (address (elpher-address-from-url url)))
+ (elpher-insert-index-record name address))))
+ (when (<= (line-number-at-pos) 3)
+ (insert "No bookmarked pages found.\n"))
+ (insert "\n --------------------------\n\n"
+ "Select an entry or press 'u' to return to the previous page.\n\n"
+ "Bookmarks can be renamed or deleted via the ")
+ (insert-text-button "Emacs bookmark menu"
+ 'action (lambda (_)
+ (interactive)
+ (call-interactively #'bookmark-bmenu-list))
+ 'follow-link t
+ 'help-echo "RET,mouse-1: open Emacs bookmark menu")
+ (insert (substitute-command-keys
+ ",\nwhich can also be opened from anywhere using '\\[bookmark-bmenu-list]'."))
+ (elpher-restore-pos)))
+
+(defun elpher-show-bookmarks ()
"Display the current list of elpher bookmarks.
-This is just a call to `bookmark-bmenu-list', but we also check for a legacy
-bookmark file and offer to import it."
+This will also check for a legacy bookmark file and offer to import it."
(interactive)
(let ((old-bookmarks-file (or (and (boundp 'elpher-bookmarks-file)
elpher-bookmarks-file)
"\" found. Import now?")))
(elpher-bookmark-import old-bookmarks-file)
(rename-file old-bookmarks-file (concat old-bookmarks-file "-legacy"))))
- (call-interactively #'bookmark-bmenu-list))
+ (if elpher-use-emacs-bookmark-menu
+ (call-interactively #'bookmark-bmenu-list)
+ (elpher-visit-page
+ (elpher-make-page "Elpher Bookmarks"
+ (elpher-make-special-address 'bookmarks)))))
;;; Integrations
(setq mu4e~view-beginning-of-url-regexp
"\\(?:https?\\|gopher\\|finger\\|gemini\\)://\\|mailto:")
+;;; eww:
+
+;; Let elpher handle gemini, gopher links in eww buffer.
+(setq eww-use-browse-url
+ "\\`mailto:\\|\\(\\`gemini\\|\\`gopher\\|\\`finger\\)://")
+
;;; Interactive procedures
;;
"Go to a particular gopher site HOST-OR-URL.
When run interactively HOST-OR-URL is read from the minibuffer."
(interactive "sGopher or Gemini URL: ")
- (let* ((cleaned-host-or-url (string-trim host-or-url))
- (address (elpher-address-from-url cleaned-host-or-url))
- (page (elpher-make-page cleaned-host-or-url address)))
- (switch-to-buffer elpher-buffer-name)
- (elpher-with-clean-buffer
- (elpher-visit-page page))
- nil))
+ (let ((trimmed-host-or-url (string-trim host-or-url)))
+ (unless (string-empty-p trimmed-host-or-url)
+ (let* ((address (elpher-address-from-url trimmed-host-or-url))
+ (page (elpher-make-page trimmed-host-or-url address)))
+ (switch-to-buffer elpher-buffer-name)
+ (elpher-with-clean-buffer
+ (elpher-visit-page page))
+ nil)))) ; non-nil value is displayed by eshell
(defun elpher-go-current ()
"Go to a particular site read from the minibuffer, initialized with the current URL."
(interactive)
- (let ((address (elpher-page-address elpher-current-page)))
- (let ((url (read-string "Gopher or Gemini URL: "
- (unless (elpher-address-special-p address)
- (elpher-address-to-url address)))))
+ (let* ((address (elpher-page-address elpher-current-page))
+ (url (read-string "Gopher or Gemini URL: "
+ (unless (elpher-address-special-p address)
+ (elpher-address-to-url address)))))
+ (unless (string-empty-p (string-trim url))
(elpher-visit-page (elpher-make-page url (elpher-address-from-url url))))))
(defun elpher-redraw ()
(let ((button (button-at (point))))
(if button
(let ((page (button-get button 'elpher-page)))
- (if (elpher-address-special-p (elpher-page-address page))
- (error "Cannot download %s"
- (elpher-page-display-string page))
- (elpher-visit-page (button-get button 'elpher-page)
- #'elpher-render-download)))
+ (unless page
+ (error "Not an elpher page"))
+ (when (elpher-address-special-p (elpher-page-address page))
+ (error "Cannot download %s" (elpher-page-display-string page)))
+ (elpher-visit-page (button-get button 'elpher-page)
+ #'elpher-render-download))
(error "No link selected"))))
(defun elpher-download-current ()
"Display information on PAGE."
(let ((display-string (elpher-page-display-string page))
(address (elpher-page-address page)))
- (if (elpher-address-special-p address)
- (message "Special page: %s" display-string)
- (message "%s" (elpher-address-to-url address)))))
+ (message "%s" (elpher-address-to-url address))))
(defun elpher-info-link ()
"Display information on page corresponding to link at point."
(interactive)
(let ((button (button-at (point))))
- (if button
- (elpher-info-page (button-get button 'elpher-page))
- (error "No item selected"))))
+ (unless button
+ (error "No item selected"))
+ (let ((page (button-get button 'elpher-page)))
+ (unless page
+ (error "Not an elpher page"))
+ (elpher-info-page page))))
(defun elpher-info-current ()
"Display information on current page."
(defun elpher-copy-page-url (page)
"Copy URL representation of address of PAGE to `kill-ring'."
- (let ((address (elpher-page-address page)))
- (if (elpher-address-special-p address)
- (error (format "Cannot represent %s as URL" (elpher-page-display-string page)))
- (let ((url (elpher-address-to-url address)))
- (message "Copied \"%s\" to kill-ring/clipboard." url)
- (kill-new url)))))
+ (let* ((address (elpher-page-address page))
+ (url (elpher-address-to-url address)))
+ (message "Copied \"%s\" to kill-ring/clipboard." url)
+ (kill-new url)))
(defun elpher-copy-link-url ()
"Copy URL of item at point to `kill-ring'."
(interactive)
(let ((button (button-at (point))))
- (if button
- (elpher-copy-page-url (button-get button 'elpher-page))
- (error "No item selected"))))
+ (unless button
+ (error "No item selected"))
+ (let ((page (button-get button 'elpher-page)))
+ (unless page
+ (error "Not an elpher page"))
+ (elpher-copy-page-url page))))
(defun elpher-copy-current-url ()
"Copy URL of current page to `kill-ring'."
(define-key map (kbd "C") 'elpher-copy-current-url)
(define-key map (kbd "a") 'elpher-bookmark-link)
(define-key map (kbd "A") 'elpher-bookmark-current)
- (define-key map (kbd "B") 'elpher-open-bookmarks)
+ (define-key map (kbd "B") 'elpher-show-bookmarks)
(define-key map (kbd "!") 'elpher-set-gopher-coding-system)
(define-key map (kbd "F") 'elpher-forget-current-certificate)
(when (fboundp 'evil-define-key*)
(kbd "C") 'elpher-copy-current-url
(kbd "a") 'elpher-bookmark-link
(kbd "A") 'elpher-bookmark-current
- (kbd "B") 'elpher-open-bookmarks
+ (kbd "B") 'elpher-show-bookmarks
(kbd "!") 'elpher-set-gopher-coding-system
(kbd "F") 'elpher-forget-current-certificate))
map)
The Lambda Lab / projects / elpher.git / blobdiff