;;; elpher.el --- A friendly gopher and gemini client -*- lexical-binding: t -*-
-;; Copyright (C) 2021 Jens Östlund <jostlund@gmail.com>
-;; Copyright (C) 2021 F. Jason Park <jp@neverwas.me>
-;; 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) 2020-2021 Alex Schroeder <alex@gnu.org>
-;; Copyright (C) 2020 Zhiwei Chen <chenzhiwei03@kuaishou.com>
-;; Copyright (C) 2020 condy0919 <condy0919@gmail.com>
-;; Copyright (C) 2020 Alexis <flexibeast@gmail.com>
-;; Copyright (C) 2020 Étienne Deparis <etienne@depar.is>
-;; Copyright (C) 2020 Simon Nicolussi <sinic@sinic.name>
-;; Copyright (C) 2020 Michel Alexandre Salim <michel@michel-slm.name>
-;; Copyright (C) 2020 Koushk Roy <kroy@twilio.com>
-;; Copyright (C) 2020 Vee <vee@vnsf.xyz>
-;; Copyright (C) 2020 Simon South <simon@simonsouth.net>
-;; Copyright (C) 2019-2021 Tim Vaughan <plugd@thelambdalab.xyz>
+;; Copyright (C) 2019-2022 Tim Vaughan <plugd@thelambdalab.xyz>
+;; Copyright (C) 2020-2022 Elpher contributors (See info manual for full list)
;; Author: Tim Vaughan <plugd@thelambdalab.xyz>
;; Created: 11 April 2019
-;; Version: 2.11.0
+;; Version: 3.4.0
;; Keywords: comm gopher
;; Homepage: https://thelambdalab.xyz/elpher
;; Package-Requires: ((emacs "27.1"))
;; Full instructions can be found in the Elpher info manual.
;; Elpher is under active development. Any suggestions for
-;; improvements are welcome, and can be made on the official
-;; project page, gopher://thelambdalab.xyz/elpher, or via the
+;; improvements are welcome, and can be made on the official project
+;; page, gopher://thelambdalab.xyz/1/projects/elpher, or via the
;; project mailing list at https://lists.sr.ht/~michel-slm/elpher.
;;; Code:
;;
(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 "2.11.0"
+(defconst elpher-version "3.4.0"
"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)
- ((special history) elpher-get-history-page nil)
- ((special history-all) elpher-get-history-all-page nil))
+ (file elpher-get-file-page nil "~" elpher-gemini)
+ ((about welcome) elpher-get-welcome-page nil "E" elpher-index)
+ ((about bookmarks) elpher-get-bookmarks-page nil "E" elpher-index)
+ ((about history) elpher-get-history-page nil "E" elpher-index)
+ ((about visited-pages) elpher-get-visited-pages-page nil "E" elpher-index))
"Association list from types to getters, renderers, margin codes and index faces.")
-;;; Internal variables
-;;
-
-;; buffer-local
-(defvar elpher--gemini-page-headings nil
- "List of headings on the page.")
-
;;; Declarations to avoid compiler warnings.
;;
(eval-when-compile
- (defvar bookmark-make-record-function)
+ (declare-function ansi-color-filter-apply "ansi-color")
+ (declare-function ansi-color-apply "ansi-color")
(declare-function bookmark-store "bookmark")
(declare-function org-link-store-props "ol")
(declare-function org-link-set-parameters "ol")
- (defvar thing-at-point-uri-schemes)
- (defvar mu4e~view-beginning-of-url-regexp))
+ (defvar ansi-color-context)
+ (defvar xterm-color--current-fg)
+ (defvar xterm-color--current-bg)
+ (defvar bookmark-make-record-function)
+ (defvar mu4e~view-beginning-of-url-regexp)
+ (defvar eww-use-browse-url)
+ (defvar thing-at-point-uri-schemes))
;;; Customization group
(defcustom elpher-filter-ansi-from-text nil
"If non-nil, filter ANSI escape sequences from text.
-The default behaviour is to use the ansi-color package to interpret these
-sequences."
+The default behaviour is to use the ansi-color package (or xterm-color if it is
+available) to interpret these sequences."
:type '(boolean))
(defcustom elpher-certificate-directory
Otherwise, the SOCKS proxy is only used for connections to onion services."
:type '(boolean))
-(defcustom elpher-number-links nil
- "If non-nil, number links in pages when rendering.
-Links can be followed numerically by pressing `M' and entering by the link number."
+(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-url "about:welcome"
+ "Specify the page displayed initially by elpher.
+The default welcome screen is \"about:welcome\", while the bookmarks list
+is \"about:bookmarks\". You can also specify local files via \"file:\".
+
+Beware that using \"about:bookmarks\" as a start page in combination with
+the `elpher-use-bookmark-menu' variable set to non-nil will prevent the
+Emacs bookmark menu being accessible via \\[elpher-show-bookmarks] from
+the start page."
+ :type '(string))
+
+(defcustom elpher-gemini-hide-preformatted nil
+ "Cause elpher to hide preformatted gemini text by default.
+When this option is enabled, preformatted text in text/gemini documents
+is replaced with a button which can be used to toggle its display.
+
+This is intended to improve accessibility, as preformatted text often
+includes art which can be difficult for screen readers to interpret
+meaningfully."
:type '(boolean))
+(defcustom elpher-gemini-preformatted-toggle-bullet "‣ "
+ "Margin symbol used to distinguish the preformatted text toggle."
+ :type '(string))
+
+(defcustom elpher-gemini-preformatted-toggle-label "[Toggle Preformatted Text]"
+ "Label of button used to toggle formatted text."
+ :type '(string))
+
;; Face customizations
(defgroup elpher-faces nil
'((t :inherit font-lock-doc-face))
"Face used for gemini quoted texts.")
+(defface elpher-gemini-preformatted-toggle
+ '((t :inherit button))
+ "Face used for buttons used to toggle display of preformatted text.")
+
;;; Model
;;
;; Address
;; An elpher "address" object is either a url object or a symbol.
-;; Symbol addresses are "special", corresponding to pages generated
+;; Addresses with the "about" type, corresponding to pages generated
;; dynamically for and by elpher. All others represent pages which
;; rely on content retrieved over the network.
-(defun elpher-address-from-url (url-string)
- "Create a ADDRESS object corresponding to the given URL-STRING."
+(defun elpher-address-from-url (url-string &optional default-scheme)
+ "Create a ADDRESS object corresponding to the given URL-STRING.
+If DEFAULT-SCHEME is non-nil, this sets the scheme of the URL when one
+is not explicitly given."
(let ((data (match-data))) ; Prevent parsing clobbering match data
(unwind-protect
(let ((url (url-generic-parse-url url-string)))
(unless (and (not (url-fullness url)) (url-type url))
- (setf (url-fullness url) t)
(unless (url-type url)
- (setf (url-type url) elpher-default-url-type))
+ (setf (url-type url) default-scheme))
(unless (url-host url)
(let ((p (split-string (url-filename url) "/" nil nil)))
(setf (url-host url) (car p))
(if (cdr p)
(concat "/" (mapconcat #'identity (cdr p) "/"))
""))))
+ (when (not (string-empty-p (url-host url)))
+ (setf (url-fullness url) t)
+ (setf (url-host url) (puny-encode-domain (url-host url))))
(when (or (equal "gopher" (url-type url))
(equal "gophers" (url-type url)))
;; Gopher defaults
"Remove redundant port specifiers from ADDRESS.
Here 'redundant' means that the specified port matches the default
for that protocol, eg 70 for gopher."
- (if (and (not (elpher-address-special-p address))
+ (if (and (not (elpher-address-about-p address))
(eq (url-portspec address) ; (url-port) is too slow!
(pcase (url-type address)
("gemini" 1965)
"/" (string type)
selector)))))
-(defun elpher-make-special-address (type)
- "Create an ADDRESS object corresponding to the given special address symbol TYPE."
- type)
-
-(defun elpher-make-start-page ()
- "Create the start page."
- (elpher-make-page "Elpher Start Page"
- (elpher-make-special-address 'start)))
+(defun elpher-make-about-address (type)
+ "Create an ADDRESS object corresponding to the given about address 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))))
+ "Get string representation of 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)))))
+ (pcase (url-type address)
+ ("about"
+ (list 'about (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-about-p (address)
+ "Return non-nil if ADDRESS is an about address."
+ (pcase (elpher-address-type address) (`(about ,_) t)))
+
+(defun elpher-address-gopher-p (address)
+ "Return non-nill if ADDRESS object is a gopher address."
+ (pcase (elpher-address-type address) (`(gopher ,_) t)))
(defun elpher-address-protocol (address)
- "Retrieve the transport protocol for ADDRESS. This is nil for special addresses."
- (if (symbolp address)
- nil
- (url-type address)))
+ "Retrieve the transport protocol for ADDRESS."
+ (url-type address))
(defun elpher-address-filename (address)
"Retrieve the filename component of ADDRESS.
For gopher addresses this is a combination of the selector type and selector."
- (if (symbolp address)
- nil
- (url-unhex-string (url-filename address))))
+ (url-unhex-string (url-filename address)))
(defun elpher-address-host (address)
"Retrieve host from ADDRESS object."
- (url-host address))
+ (let ((host-pre (url-host address)))
+ ;; The following strips out square brackets which sometimes enclose IPv6
+ ;; addresses. Doing this here rather than at the parsing stage may seem
+ ;; weird, but this lets us way we avoid having to muck with both URL parsing
+ ;; and reconstruction. It's also more efficient, as this method is not
+ ;; called during page rendering.
+ (if (and (> (length host-pre) 2)
+ (eq (elt host-pre 0) ?\[)
+ (eq (elt host-pre (- (length host-pre) 1)) ?\]))
+ (substring host-pre 1 (- (length host-pre) 1))
+ host-pre)))
(defun elpher-address-user (address)
"Retrieve user from ADDRESS object."
(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)
- 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"))))
+If no address is defined, returns 0. (This is for compatibility with
+the URL library.)"
+ (url-port address))
(defun elpher-gopher-address-selector (address)
"Retrieve gopher selector from ADDRESS object."
"Create a page with DISPLAY-STRING and ADDRESS."
(list display-string address))
+(defun elpher-make-start-page ()
+ "Create the start page."
+ (elpher-make-page "Start Page"
+ (elpher-address-from-url elpher-start-page-url)))
+
(defun elpher-page-display-string (page)
"Retrieve the display string corresponding to PAGE."
(elt page 0))
"Set the address corresponding to PAGE to NEW-ADDRESS."
(setcar (cdr page) new-address))
+(defun elpher-page-from-url (url &optional default-scheme)
+ "Create a page with address and display string defined by URL.
+The URL is unhexed prior to its use as a display string to improve
+readability.
+
+If DEFAULT-SCHEME is non-nil, this scheme is applied to the URL
+in the instance that URL itself doesn't specify one."
+ (let ((address (elpher-address-from-url url default-scheme)))
+ (elpher-make-page (elpher-address-to-iri address) address)))
+
+(defun elpher-address-to-iri (address)
+ "Return an IRI for ADDRESS.
+Decode percent-escapes and handle punycode in the domain name.
+Drop the password, if any."
+ (let ((data (match-data)) ; Prevent parsing clobbering match data
+ (host (url-host address))
+ (pass (url-password address)))
+ (unwind-protect
+ (let* ((host (url-host address))
+ (pass (url-password address)))
+ (when host
+ (setf (url-host address) (puny-decode-domain host)))
+ (when pass ; RFC 3986 says we should not render
+ (setf (url-password address) nil)) ; the password as clear text
+ (elpher-decode (url-unhex-string (url-recreate-url address))))
+ (setf (url-host address) host)
+ (setf (url-password address) pass)
+ (set-match-data data))))
+
(defvar elpher-current-page nil
"The current page for this Elpher buffer.")
(defvar elpher-history nil
- "The local history for this Elpher buffer.
+ "The local history stack for this Elpher buffer.
This variable is used by `elpher-back' and
`elpher-show-history'.")
-(defvar elpher-history-all nil
+(defvar elpher-visited-pages nil
"The global history for all Elpher buffers.
-This variable is used by `elpher-show-history-all'.")
+This variable is used by `elpher-show-visited-pages'.")
(defun elpher-visit-page (page &optional renderer no-history)
"Visit PAGE using its own renderer or RENDERER, if non-nil.
-Additionally, push PAGE onto the stack of previously-visited pages,
-unless NO-HISTORY is non-nil."
+Additionally, push PAGE onto the history stack and the list of
+previously-visited pages,unless NO-HISTORY is non-nil."
(elpher-save-pos)
(elpher-process-cleanup)
- (elpher-reset-link-number-counter)
- (unless (or no-history
- (equal (elpher-page-address elpher-current-page)
- (elpher-page-address page)))
- (push elpher-current-page elpher-history)
- (push elpher-current-page elpher-history-all))
+ (unless no-history
+ (unless (or (not elpher-current-page)
+ (equal (elpher-page-address elpher-current-page)
+ (elpher-page-address page)))
+ (push elpher-current-page elpher-history)
+ (unless (or (elpher-address-about-p (elpher-page-address page))
+ (and elpher-visited-pages
+ (equal page (car elpher-visited-pages))))
+ (push page elpher-visited-pages))))
(setq-local elpher-current-page page)
(let* ((address (elpher-page-address page))
(type (elpher-address-type address))
(defun elpher-visit-previous-page ()
"Visit the previous page in the history."
- (let ((previous-page (pop elpher-history)))
- (if previous-page
- (elpher-visit-page previous-page nil t)
- (error "No previous page"))))
+ (if elpher-history
+ (elpher-visit-page (pop elpher-history) nil t)
+ (error "No previous page")))
(defun elpher-reload-current-page ()
"Reload the current page, discarding any existing cached content."
(goto-char pos)
(goto-char (point-min)))))
+(defun elpher-get-default-url-scheme ()
+ "Suggest default URL scheme for visiting addresses based on the current page."
+ (if elpher-current-page
+ (let* ((address (elpher-page-address elpher-current-page))
+ (current-type (elpher-address-type address)))
+ (pcase current-type
+ ((or (and 'file (guard (not elpher-history)))
+ `(about ,_))
+ elpher-default-url-type)
+ (_
+ (url-type address))))
+ elpher-default-url-type))
+
;;; Buffer preparation
;;
(defun elpher-update-header ()
"If `elpher-use-header' is true, display current page info in window header."
- (if elpher-use-header
+ (if (and elpher-use-header elpher-current-page)
(let* ((display-string (elpher-page-display-string elpher-current-page))
+ (sanitized-display-string (replace-regexp-in-string "%" "%%" display-string))
(address (elpher-page-address elpher-current-page))
- (tls-string (if (and (not (elpher-address-special-p address))
+ (tls-string (if (and (not (elpher-address-about-p address))
(member (elpher-address-protocol address)
'("gophers" "gemini")))
" [TLS encryption]"
""))
- (header (concat display-string
+ (header (concat sanitized-display-string
(propertize tls-string 'face 'bold))))
(setq header-line-format header))))
(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-mode))
- (let ((inhibit-read-only t))
+ (let ((inhibit-read-only t)
+ (ansi-color-context nil)) ;; clean ansi interpreter state (also next 2 lines)
+ (setq-local xterm-color--current-fg nil)
+ (setq-local xterm-color--current-bg nil)
(setq-local network-security-level
(default-value 'network-security-level))
(erase-buffer)
(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-page-from-url (substring-no-properties (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
;;
(if (timerp elpher-network-timer)
(cancel-timer elpher-network-timer)))
+(defun elpher-make-network-timer (thunk)
+ "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."
+ (let ((timer (run-at-time elpher-connection-timeout nil thunk)))
+ (setq-local elpher-network-timer timer)
+ timer))
+
(defun elpher-get-host-response (address default-port query-string response-processor
&optional use-tls force-ipv4)
"Generic function for retrieving data from ADDRESS.
(condition-case nil
(let* ((kill-buffer-query-functions nil)
(port (elpher-address-port address))
- (service (if (> port 0) port default-port))
(host (elpher-address-host address))
- (socks (or elpher-socks-always (string-suffix-p ".onion" host)))
+ (service (if (> port 0) port default-port))
(response-string-parts nil)
(bytes-received 0)
(hkbytes-received 0)
- (timer (run-at-time elpher-connection-timeout nil
+ (socks (or elpher-socks-always (string-suffix-p ".onion" host)))
+ (gnutls-params (list :type 'gnutls-x509pki
+ :hostname host
+ :keylist
+ (elpher-get-current-keylist address)))
+ (timer (elpher-make-network-timer
(lambda ()
(elpher-process-cleanup)
(cond
; Try again with IPv4
- ((not (or force-ipv4 socks))
+ ((not (or elpher-ipv4-always force-ipv4 socks))
(message "Connection timed out. Retrying with IPv4.")
(elpher-get-host-response address default-port
query-string
nil force-ipv4))
(t
(elpher-network-error address "Connection time-out."))))))
- (gnutls-params (list :type 'gnutls-x509pki :hostname host
- :keylist (elpher-get-current-keylist address)))
(proc (if socks (socks-open-network-stream "elpher-process" nil host service)
(make-network-process :name "elpher-process"
:host host
- :family (and force-ipv4 'ipv4)
+ :family (and (or force-ipv4
+ elpher-ipv4-always)
+ 'ipv4)
:service service
:buffer nil
:nowait t
(if use-tls (apply #'gnutls-negotiate :process proc gnutls-params))
(funcall (process-sentinel proc) proc "open\n")))
(error
+ (elpher-process-cleanup)
(error "Error initiating connection to server")))))
;; Index rendering
-(defun elpher-insert-index (string)
- "Insert the index corresponding to STRING into the current buffer."
- ;; Should be able to split directly on CRLF, but some non-conformant
- ;; LF-only servers sadly exist, hence the following.
- (let ((str-processed (elpher-preprocess-text-response string)))
- (dolist (line (split-string str-processed "\n"))
- (ignore-errors
- (unless (= (length line) 0)
- (let* ((type (elt line 0))
- (fields (split-string (substring line 1) "\t"))
- (display-string (elt fields 0))
- (selector (elt fields 1))
- (host (elt fields 2))
- (port (if (elt fields 3)
- (string-to-number (elt fields 3))
- nil))
- (address (elpher-make-gopher-address type selector host port)))
- (elpher-insert-index-record display-string address)))))))
-
(defun elpher-insert-margin (&optional type-name)
- "Insert index margin, optionally containing the TYPE-NAME, into the current buffer."
+ "Insert index margin, optionally containing the TYPE-NAME, into current buffer."
(if type-name
(progn
(insert (format (concat "%" (number-to-string (- elpher-margin-width 1)) "s")
(when button
(let* ((page (button-get button 'elpher-page))
(address (elpher-page-address page)))
- (format "mouse-1, RET: open '%s'" (if (elpher-address-special-p address)
- address
- (elpher-address-to-url address))))))))
-
-(defvar elpher--link-number-counter 0
- "Used to number links on elpher pages.")
-(defun elpher-reset-link-number-counter ()
- "Reset the link number counter."
- (setq-local elpher--link-number-counter 0))
-
-(defun elpher--insert-text-button (label &rest properties)
- "Insert a potentially-numbered button into the current buffer.
-The text for the button is provided by LABEL, while the button
-properties in PROPERTIES are as per `insert-text-button'."
-
- (if elpher-number-links
- (setq-local elpher--link-number-counter (+ elpher--link-number-counter 1)))
- (let ((pref (if elpher-number-links
- (concat "[" (number-to-string elpher--link-number-counter) "] ")
- "")))
- (apply #'insert-text-button (cons (concat pref label) properties))))
+ (format "mouse-1, RET: open '%s'" (elpher-address-to-url address)))))))
(defun elpher-insert-index-record (display-string &optional address)
"Function to insert an index record into the current buffer.
(filtered-display-string (elpher-color-filter-apply display-string))
(page (elpher-make-page filtered-display-string address)))
(elpher-insert-margin margin-code)
- (elpher--insert-text-button filtered-display-string
- 'face face
- 'elpher-page page
- 'action #'elpher-click-link
- 'follow-link t
- 'help-echo #'elpher--page-button-help))
+ (insert-text-button filtered-display-string
+ 'face face
+ 'elpher-page page
+ 'action #'elpher-click-link
+ 'follow-link t
+ 'help-echo #'elpher--page-button-help))
(pcase type
('nil ;; Information
(elpher-insert-margin)
(insert "\n")))
(defun elpher-click-link (button)
- "Function called when the gopher link BUTTON is activated (via mouse or keypress)."
+ "Function called when the gopher link BUTTON is activated."
(let ((page (button-get button 'elpher-page)))
(elpher-visit-page page)))
(elpher-with-clean-buffer
(if (not data)
t
- (elpher-insert-index data)
+ (let ((data-processed (elpher-preprocess-text-response data)))
+ (dolist (line (split-string data-processed "\n"))
+ (ignore-errors
+ (unless (= (length line) 0)
+ (let* ((type (elt line 0))
+ (fields (split-string (substring line 1) "\t"))
+ (display-string (elt fields 0))
+ (selector (elt fields 1))
+ (host (elt fields 2))
+ (port (if (elt fields 3)
+ (string-to-number (elt fields 3))
+ nil))
+ (address (elpher-make-gopher-address type selector host port)))
+ (elpher-insert-index-record display-string address))))))
(elpher-cache-content (elpher-page-address elpher-current-page)
(buffer-string)))))
;; 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 buttinofy 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)))
-
-(defconst elpher-ansi-regex "\x1b\\[[^m]*m"
- "Incomplete regexp used to strip out some troublesome ANSI escape sequences.")
-
-(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)))
+ (let* ((image (create-image
+ data
+ nil t)))
+ (if (not image)
+ (error "Unsupported image format")
+ (let ((window (get-buffer-window elpher-buffer-name)))
+ (when window
+ (setf (image-property image :max-width) (window-body-width window t))
+ (setf (image-property image :max-height) (window-body-height window t))))
(elpher-with-clean-buffer
(insert-image image)
(elpher-restore-pos))))
(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)
(defun elpher-gemini-get-link-display-string (link-line)
"Extract the display string portion of LINK-LINE, a gemini map file link line.
-Returns the url portion in the event that the display-string portion is empty."
+Return nil if this portion is not provided."
(let* ((rest (string-trim (elt (split-string link-line "=>") 1)))
(idx (string-match "[ \t]" rest)))
- (string-trim (if idx
- (substring rest (+ idx 1))
- rest))))
+ (and idx
+ (elpher-color-filter-apply (string-trim (substring rest (+ idx 1)))))))
(defun elpher-collapse-dot-sequences (filename)
- "Collapse dot sequences in FILENAME.
-For instance, the filename /a/b/../c/./d will reduce to /a/c/d"
- (let* ((path (split-string filename "/"))
+ "Collapse dot sequences in the (absolute) FILENAME.
+For instance, the filename \"/a/b/../c/./d\" will reduce to \"/a/c/d\""
+ (let* ((path (split-string filename "/" t))
+ (is-directory (string-match-p (rx (: (or "." ".." "/") line-end)) filename))
(path-reversed-normalized
(seq-reduce (lambda (a b)
- (cond ((and a (equal b "..") (cdr a)))
- ((and (not a) (equal b "..")) a) ;leading .. are dropped
+ (cond ((equal b "..") (cdr a))
((equal b ".") a)
(t (cons b a))))
- path nil)))
- (string-join (reverse path-reversed-normalized) "/")))
+ path nil))
+ (path-normalized (reverse path-reversed-normalized)))
+ (if path-normalized
+ (concat "/" (string-join path-normalized "/") (and is-directory "/"))
+ "/")))
(defun elpher-address-from-gemini-url (url)
"Extract address from URL with defaults as per gemini map files.
(let ((address (url-generic-parse-url url))
(current-address (elpher-page-address elpher-current-page)))
(unless (and (url-type address) (not (url-fullness address))) ;avoid mangling mailto: urls
- (setf (url-fullness address) t)
(if (url-host address) ;if there is an explicit host, filenames are absolute
(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-fullness address) (url-host address)) ; set fullness to t if host is set
+ (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))
(url-filename address)))))
+ (when (url-host address)
+ (setf (url-host address) (puny-encode-domain (url-host address))))
(unless (url-type address)
- (setf (url-type address) "gemini"))
+ (setf (url-type address) (url-type current-address)))
(when (equal (url-type address) "gemini")
(setf (url-filename address)
(elpher-collapse-dot-sequences (url-filename address)))))
(defun elpher-gemini-insert-link (link-line)
"Insert link described by LINK-LINE into a text/gemini document."
- (let* ((url (elpher-gemini-get-link-url link-line))
- (display-string (elpher-gemini-get-link-display-string link-line))
- (address (elpher-address-from-gemini-url url))
- (type (if address (elpher-address-type address) nil))
- (type-map-entry (cdr (assoc type elpher-type-map))))
- (when display-string
- (insert elpher-gemini-link-string)
- (if type-map-entry
+ (let ((url (elpher-gemini-get-link-url link-line)))
+ (when url
+ (let* ((given-display-string (elpher-gemini-get-link-display-string link-line))
+ (address (elpher-address-from-gemini-url url))
+ (type (if address (elpher-address-type address) nil))
+ (type-map-entry (cdr (assoc type elpher-type-map)))
+ (fill-prefix (make-string (+ 1 (length elpher-gemini-link-string)) ?\s)))
+ (when type-map-entry
+ (insert elpher-gemini-link-string)
(let* ((face (elt type-map-entry 3))
- (filtered-display-string (elpher-color-filter-apply display-string))
- (page (elpher-make-page filtered-display-string address)))
- (elpher--insert-text-button filtered-display-string
- 'face face
- 'elpher-page page
- 'action #'elpher-click-link
- 'follow-link t
- 'help-echo #'elpher--page-button-help))
- (insert (propertize display-string 'face 'elpher-unknown)))
- (insert "\n"))))
+ (display-string (or given-display-string
+ (elpher-address-to-iri address)))
+ (page (elpher-make-page display-string
+ address)))
+ (insert-text-button display-string
+ 'face face
+ 'elpher-page page
+ 'action #'elpher-click-link
+ 'follow-link t
+ 'help-echo #'elpher--page-button-help))
+ (newline))))))
(defun elpher-gemini-insert-header (header-line)
"Insert header described by HEADER-LINE into a text/gemini document.
(/ (* fill-column
(font-get (font-spec :name (face-font 'default)) :size))
(font-get (font-spec :name (face-font face)) :size)) fill-column)))
- (setq elpher--gemini-page-headings (cons (cons header (point))
- elpher--gemini-page-headings))
(unless (display-graphic-p)
(insert (make-string level ?#) " "))
- (insert (propertize header 'face face))
+ (insert (propertize header
+ 'face face
+ 'gemini-heading t
+ 'rear-nonsticky t))
(newline))))
(defun elpher-gemini-insert-text (text-line)
"Insert a plain non-preformatted TEXT-LINE into a text/gemini document.
This function uses Emacs' auto-fill to wrap text sensibly to a maximum
width defined by `elpher-gemini-max-fill-width'."
- (string-match "\\(^[ \t]*\\)\\(\\*[ \t]+\\|>[ \t]*\\)?" text-line)
- (let* ((line-prefix (match-string 2 text-line))
+ (string-match
+ (rx (: line-start
+ (optional
+ (group (or (: "*" (+ (any " \t")))
+ (: ">" (* (any " \t"))))))))
+ text-line)
+ (let* ((line-prefix (match-string 1 text-line))
(processed-text-line
(if line-prefix
(cond ((string-prefix-p "*" line-prefix)
(propertize text-line 'face 'elpher-gemini-quoted))
(t text-line))
text-line))
- (adaptive-fill-mode t)
- ;; fill-prefix is important for adaptive-fill-mode: without
- ;; it, multi-line list items are not indented correct
- (fill-prefix (if (match-string 2 text-line)
- (replace-regexp-in-string "[>\*]" " " (match-string 0 text-line))
- nil)))
+ (fill-prefix (if line-prefix
+ (make-string (length (match-string 0 text-line)) ?\s)
+ "")))
(insert (elpher-process-text-for-display processed-text-line))
(newline)))
+(defun elpher-gemini-pref-expand-collapse (button)
+ "Function called when the preformatted text toggle BUTTON is activated."
+ (let ((id (button-get button 'pref-id)))
+ (if (invisible-p id)
+ (remove-from-invisibility-spec id)
+ (add-to-invisibility-spec id))
+ (redraw-display)))
+
+(defun elpher-gemini-insert-preformatted-toggler (alt-text)
+ "Insert a button for toggling the visibility of preformatted text.
+If non-nil, ALT-TEXT is displayed alongside the button."
+ (let* ((url-string (url-recreate-url (elpher-page-address elpher-current-page)))
+ (pref-id (intern (concat "pref-"
+ (number-to-string (point))
+ "-"
+ url-string))))
+ (insert elpher-gemini-preformatted-toggle-bullet)
+ (when alt-text
+ (insert (propertize (concat alt-text " ")
+ 'face 'elpher-gemin-preformatted)))
+ (insert-text-button elpher-gemini-preformatted-toggle-label
+ 'action #'elpher-gemini-pref-expand-collapse
+ 'pref-id pref-id
+ 'face 'elpher-gemini-preformatted-toggle)
+ (add-to-invisibility-spec pref-id)
+ (newline)
+ pref-id))
+
+(defun elpher-gemini-insert-preformatted-line (line &optional pref-id)
+ "Insert a LINE of preformatted text.
+PREF-ID is the value assigned to the \"invisible\" text attribute, which
+can be used to toggle the display of the preformatted text."
+ (insert (propertize (concat (elpher-process-text-for-display line) "\n")
+ 'face 'elpher-gemini-preformatted
+ 'invisible pref-id
+ 'rear-nonsticky t)))
+
(defun elpher-render-gemini-map (data _parameters)
"Render DATA as a gemini map file, PARAMETERS is currently unused."
(elpher-with-clean-buffer
- (setq elpher--gemini-page-headings nil)
- (let ((preformatted nil))
- (auto-fill-mode 1)
+ (auto-fill-mode 1)
+ (setq-local buffer-invisibility-spec nil)
+ (let ((preformatted nil)
+ (adaptive-fill-mode nil)) ;Prevent automatic setting of fill-prefix
(setq-local fill-column (min (window-width) elpher-gemini-max-fill-width))
(dolist (line (split-string data "\n"))
- (cond
- ((string-prefix-p "```" line) (setq preformatted (not preformatted)))
- (preformatted (insert (elpher-process-text-for-display
- (propertize line 'face 'elpher-gemini-preformatted))
- "\n"))
- ((string-prefix-p "=>" line)
- (elpher-gemini-insert-link line))
- ((string-prefix-p "#" line) (elpher-gemini-insert-header line))
- (t (elpher-gemini-insert-text line)))))
- (setq elpher--gemini-page-headings (nreverse elpher--gemini-page-headings))
+ (pcase line
+ ((rx (: "```" (opt (let alt-text (+ any)))))
+ (setq preformatted
+ (if preformatted
+ nil
+ (if elpher-gemini-hide-preformatted
+ (elpher-gemini-insert-preformatted-toggler alt-text)
+ t))))
+ ((guard preformatted)
+ (elpher-gemini-insert-preformatted-line line preformatted))
+ ((pred (string-prefix-p "=>"))
+ (elpher-gemini-insert-link line))
+ ((pred (string-prefix-p "#"))
+ (elpher-gemini-insert-header line))
+ (_ (elpher-gemini-insert-text line))))
(elpher-cache-content
(elpher-page-address elpher-current-page)
- (buffer-string))))
+ (buffer-string)))))
(defun elpher-render-gemini-plain-text (data _parameters)
"Render DATA as plain text file. PARAMETERS is currently unused."
(elpher-page-address elpher-current-page)
(buffer-string))))
+(defun elpher-build-current-imenu-index ()
+ "Build imenu index for current elpher buffer."
+ (save-excursion
+ (goto-char (point-min))
+ (let ((match nil)
+ (headers nil))
+ (while (setq match (text-property-search-forward 'gemini-heading t t))
+ (push (cons
+ (buffer-substring-no-properties (prop-match-beginning match)
+ (prop-match-end match))
+ (prop-match-beginning match))
+ headers))
+ (reverse headers))))
+
;; Finger page connection
;; Other URL page opening
(defun elpher-get-other-url-page (renderer)
- "Getter which attempts to open the URL specified by the current page (RENDERER must be nil)."
+ "Getter which attempts to open the URL specified by the current page.
+The RENDERER argument to this getter must be nil."
(when renderer
(elpher-visit-previous-page)
(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))))
-;; Start page page retrieval
+;; File page
-(defun elpher-get-start-page (renderer)
- "Getter which displays the start page (RENDERER must be nil)."
+(defun elpher-get-file-page (renderer)
+ "Getter which renders a local file using RENDERER.
+Assumes UTF-8 encoding for all text files."
+ (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"))
+ (let ((body (with-temp-buffer
+ (let ((coding-system-for-read 'binary)
+ (coding-system-for-write 'binary))
+ (insert-file-contents-literally filename)
+ (encode-coding-string (buffer-string) 'raw-text)))))
+ (if renderer
+ (funcall renderer body nil)
+ (pcase (file-name-extension filename)
+ ((or "gmi" "gemini")
+ (elpher-render-gemini-map (decode-coding-string body 'utf-8) nil))
+ ((or "htm" "html")
+ (elpher-render-html (decode-coding-string body 'utf-8)))
+ ((or "txt" "")
+ (elpher-render-text (decode-coding-string body 'utf-8)))
+ ((or "jpg" "jpeg" "gif" "png" "bmp" "tif" "tiff")
+ (elpher-render-image body))
+ ((or "gopher" "gophermap")
+ (elpher-render-index (elpher-decode body)))
+ (_
+ (elpher-render-download body))))
+ (elpher-restore-pos))))
+
+
+;; 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"
"\n"
" - TAB/Shift-TAB: next/prev item on current page\n"
" - RET/mouse-1: open item under cursor\n"
- " - m/M: select an item on current page by name (autocompletes) or number\n"
+ " - m: select an item on current page by name (autocompletes)\n"
" - u/mouse-3/U: return to previous page or to the start page\n"
- " - o/O: visit different selector or the root menu of the current server\n"
" - g: go to a particular address (gopher, gemini, finger)\n"
+ " - o/O: open a different address selector or the root menu of the current server\n"
" - d/D: download item under cursor or current page\n"
" - i/I: info on item under cursor or current page\n"
" - c/C: copy URL representation of item under cursor or current page\n"
" - a/A: bookmark the item under cursor or current page\n"
" - B: list all bookmarks\n"
- " - s/S: show history of current buffer or for all buffers\n"
+ " - s/S: show current history stack or all previously visted pages\n"
" - r: redraw current page (using cached contents if available)\n"
" - R: reload current page (regenerates cache)\n"
" - !: set character coding system for gopher (default is to autodetect)\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"))
- (elpher--insert-text-button "Emacs bookmark list"
- 'face 'link
- 'action (lambda (_)
- (interactive)
- (call-interactively #'bookmark-bmenu-list))
- 'follow-link t
- 'help-echo help-string))
+ (insert-text-button "bookmark list"
+ 'face 'link
+ 'action #'elpher-click-link
+ 'follow-link t
+ 'help-echo #'elpher--page-button-help
+ 'elpher-page
+ (elpher-make-page "Elpher Bookmarks"
+ (elpher-make-about-address 'bookmarks)))
(insert ".\n")
(insert (propertize
"(Bookmarks from legacy elpher-bookmarks files will be automatically imported.)\n"
'face 'shadow))
(insert "\n"
- "For Elpher release news or to leave feedback, visit:\n")
+ "The gopher home of the Elpher project is here:\n")
(elpher-insert-index-record "The Elpher Project Page"
(elpher-make-gopher-address ?1
"/projects/elpher/"
"thelambdalab.xyz"
70))
- (insert "\n"
- "** Refer to the ")
(let ((help-string "RET,mouse-1: Open Elpher info manual (if available)"))
- (elpher--insert-text-button "Elpher info manual"
- 'face 'link
- 'action (lambda (_)
- (interactive)
- (info "(elpher)"))
- 'follow-link t
- 'help-echo help-string))
- (insert " for the full documentation. **\n")
+ (insert "\n"
+ "The following info documentation is available:\n"
+ " - ")
+ (insert-text-button "Elpher Manual"
+ 'face 'link
+ 'action (lambda (_)
+ (interactive)
+ (info "(elpher)"))
+ 'follow-link t
+ 'help-echo help-string)
+ (insert "\n - ")
+ (insert-text-button "Changes introduced by the latest release"
+ 'face 'link
+ 'action (lambda (_)
+ (interactive)
+ (info "(elpher)News"))
+ 'follow-link t
+ 'help-echo help-string))
+ (insert "\n")
(insert (propertize
- (concat " (This should be available if you have installed Elpher using\n"
- " MELPA. Otherwise you will have to install the manual yourself.)\n")
+ (concat "(These documents should be available if you have installed Elpher\n"
+ " from MELPA or non-GNU ELPA. Otherwise you may have to install the\n"
+ " manual yourself.)\n")
'face 'shadow))
(elpher-restore-pos)))
+
;; History page retrieval
-(defun elpher-history ()
- "Show the history of pages leading to the current page in this buffer.
-Use \\[elpher-history-all] to see the entire history.
+(defun elpher-show-history ()
+ "Show the current contents of elpher's history stack.
+Use \\[elpher-show-visited-pages] to see the entire history.
This is rendered using `elpher-get-history-page' via `elpher-type-map'."
(interactive)
(elpher-visit-page
- (elpher-make-page "Elpher History Page"
- (elpher-make-special-address 'history))))
+ (elpher-make-page "Current History Stack"
+ (elpher-make-about-address 'history))))
-(defun elpher-history-all ()
+(defun elpher-show-visited-pages ()
"Show the all the pages you've visited using Elpher.
-Use \\[elpher-history] to see just the history for the current buffer.
-This is rendered using `elpher-get-history-all-page' via `elpher-type-map'."
+Use \\[elpher-show-history] to see just the current history stack.
+This is rendered using `elpher-get-visited-pages-page' via `elpher-type-map'."
(interactive)
(elpher-visit-page
- (elpher-make-page "Elpher History Of All Seen Pages"
- (elpher-make-special-address 'history-all))))
+ (elpher-make-page "Elpher Visted Pages"
+ (elpher-make-about-address 'visited-pages))))
(defun elpher-get-history-page (renderer)
"Getter which displays the history page (RENDERER must be nil)."
(when renderer
(elpher-visit-previous-page)
(error "Command not supported for history page"))
- (elpher-show-history elpher-history))
+ (elpher-display-history-links elpher-history "Current history stack"))
-(defun elpher-get-history-all-page (renderer)
- "Getter which displays the history page (RENDERER must be nil)."
+(defun elpher-get-visited-pages-page (renderer)
+ "Getter which displays the list of visited pages (RENDERER must be nil)."
(when renderer
(elpher-visit-previous-page)
(error "Command not supported for history page"))
- (elpher-show-history elpher-history-all))
-
-(defun elpher-show-history (pages)
- "Show all PAGES in the Elpher buffer."
- (elpher-with-clean-buffer
- (insert "---- Visited link history ----\n\n")
- (if pages
- (dolist (page pages)
- (when page
- (let ((display-string (elpher-page-display-string page))
- (address (elpher-page-address page)))
- (elpher-insert-index-record display-string address))))
- (insert "No history items found.\n"))
- (insert "\n----------------------------")))
+ (elpher-display-history-links
+ (seq-filter (lambda (page)
+ (not (elpher-address-about-p (elpher-page-address page))))
+ elpher-visited-pages)
+ "All visited pages"))
+
+(defun elpher-display-history-links (pages title)
+ "Show all PAGES in an Elpher buffer with a given TITLE."
+ (let* ((title-line (concat " ---- " title " ----"))
+ (footer-line (make-string (length title-line) ?-)))
+ (elpher-with-clean-buffer
+ (insert title-line "\n\n")
+ (if pages
+ (dolist (page pages)
+ (when page
+ (let ((display-string (elpher-page-display-string page))
+ (address (elpher-page-address page)))
+ (elpher-insert-index-record display-string address))))
+ (insert "No history items found.\n"))
+ (insert "\n " footer-line "\n"
+ "Select an entry or press 'u' to return to the previous page.")
+ (elpher-restore-pos))))
;;; Bookmarks
return a bookmark record for that link. Otherwise, return a bookmark
record for the current elpher page."
(let* ((button (and elpher-bookmark-link (button-at (point))))
- (page (if button
- (button-get button 'elpher-page)
- elpher-current-page))
- (address (elpher-page-address page))
- (url (elpher-address-to-url address))
- (display-string (elpher-page-display-string page))
- (pos (if button nil (point))))
- (if (elpher-address-special-p address)
- (error "Cannot bookmark %s" display-string)
- `(,display-string
- (defaults . (,display-string))
- (position . ,pos)
- (location . ,url)
- (handler . elpher-bookmark-jump)))))
+ (page (if button
+ (button-get button 'elpher-page)
+ elpher-current-page)))
+ (unless page
+ (error "Cannot bookmark this link"))
+ (let* ((address (elpher-page-address page))
+ (url (elpher-address-to-url address))
+ (display-string (elpher-page-display-string page))
+ (pos (if button nil (point))))
+ (if (elpher-address-about-p address)
+ (error "Cannot bookmark %s" display-string)
+ `(,display-string
+ (defaults . (,display-string))
+ (position . ,pos)
+ (location . ,url)
+ (handler . elpher-bookmark-jump))))))
;;;###autoload
(defun elpher-bookmark-jump (bookmark)
- "Go to a particular BOOKMARK."
- (let* ((url (cdr (assq 'location bookmark))))
- (elpher-go url)))
+ "Handler used to open a bookmark using elpher.
+The argument BOOKMARK is a bookmark record passed to the function.
+This handler is responsible for loading the bookmark in some buffer,
+then making that buffer the current buffer. It should not switch
+to the buffer."
+ (let* ((url (cdr (assq 'location bookmark)))
+ (cleaned-url (string-trim url))
+ (page (elpher-page-from-url cleaned-url))
+ (buffer (get-buffer-create elpher-buffer-name)))
+ (elpher-with-clean-buffer
+ (elpher-visit-page page))
+ (set-buffer buffer)
+ nil))
-(defun elpher-set-bookmark-no-overwrite ()
+(defun elpher-bookmark-link ()
"Bookmark the link at point.
-To bookmark the current page, use \\[bookmark-set-no-overwrite]."
+To bookmark the current page, use \\[elpher-bookmark-current]."
(interactive)
(let ((elpher-bookmark-link t))
(bookmark-set-no-overwrite)))
+(defun elpher-bookmark-current ()
+ "Bookmark the current page.
+To bookmark the link at point use \\[elpher-bookmark-link]."
+ (interactive)
+ (call-interactively #'bookmark-set-no-overwrite))
+
(defun elpher-bookmark-import (file)
- "Import Elpher bookmarks file FILE into Emacs bookmarks."
+ "Import legacy Elpher bookmarks file FILE into Emacs bookmarks."
(interactive (list (if (and (boundp 'elpher-bookmarks-file)
(file-readable-p elpher-bookmarks-file))
elpher-bookmarks-file
(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-get-bookmarks-page (renderer)
+ "Getter which displays the bookmarks (RENDERER must be nil)."
+ (when renderer
+ (elpher-visit-previous-page)
+ (error "Command not supported for bookmarks page"))
+
+ (let ((old-bookmarks-file (or (and (boundp 'elpher-bookmarks-file)
+ elpher-bookmarks-file)
+ (locate-user-emacs-file "elpher-bookmarks"))))
+ (when (and (file-readable-p old-bookmarks-file)
+ (y-or-n-p (concat "Legacy elpher-bookmarks file \""
+ old-bookmarks-file
+ "\" found. Import now?")))
+ (elpher-bookmark-import old-bookmarks-file)
+ (rename-file old-bookmarks-file (concat old-bookmarks-file "-legacy"))))
+
+ (if (and elpher-use-emacs-bookmark-menu
+ elpher-history)
+ (progn
+ (elpher-visit-previous-page)
+ (call-interactively #'bookmark-bmenu-list))
+ (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 ()
+ "Interactive function to display the current list of elpher bookmarks."
+ (interactive)
+ (elpher-visit-page
+ (elpher-make-page "Elpher Bookmarks"
+ (elpher-make-about-address 'bookmarks))))
+
+
;;; Integrations
;;
'("^\\(gopher\\|finger\\|gemini\\)://" . elpher-browse-url-elpher))
;; Patch `browse-url-browser-function' for older ones. The value of
;; that variable is `browse-url-default-browser' by default, so
- ;; that's the function that gets advised.
- (advice-add browse-url-browser-function :before-while
- (lambda (url &rest _args)
- "Handle gemini, gopher, and finger schemes using Elpher."
- (let ((scheme (downcase (car (split-string url ":" t)))))
- (if (member scheme '("gemini" "gopher" "finger"))
- ;; `elpher-go' always returns nil, which will stop the
- ;; advice chain here in a before-while
- (elpher-go url)
- ;; chain must continue, then return t.
- t)))))
+ ;; that's the function that gets advised. If the value is an alist,
+ ;; however, we don't know what to do. Better not interfere?
+ (when (and (symbolp browse-url-browser-function)
+ (fboundp browse-url-browser-function))
+ (advice-add browse-url-browser-function :before-while
+ (lambda (url &rest _args)
+ "Handle gemini, gopher, and finger schemes using Elpher."
+ (let ((scheme (downcase (car (split-string url ":" t)))))
+ (if (member scheme '("gemini" "gopher" "finger"))
+ ;; `elpher-go' always returns nil, which will stop the
+ ;; advice chain here in a before-while
+ (elpher-go url)
+ ;; chain must continue, then return t.
+ t))))))
;; Register "gemini://" as a URI scheme so `browse-url' does the right thing
(with-eval-after-load 'thingatpt
(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
;;
(defun elpher-go (host-or-url)
"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))
+ (interactive (list
+ (read-string (format "Visit URL (default scheme %s): " (elpher-get-default-url-scheme)))))
+ (let ((trimmed-host-or-url (string-trim host-or-url)))
+ (unless (string-empty-p trimmed-host-or-url)
+ (let ((page (elpher-page-from-url trimmed-host-or-url
+ (elpher-get-default-url-scheme))))
+ (unless (get-buffer-window elpher-buffer-name t)
+ (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."
+ "Go to a particular URL which is read from the minibuffer.
+Unlike `elpher-go', the reader is initialized with the URL of the
+current page."
(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)))))
- (elpher-visit-page (elpher-make-page url (elpher-address-from-url url))))))
+ (let* ((address (elpher-page-address elpher-current-page))
+ (url (read-string (format "Visit URL (default scheme %s): " (elpher-get-default-url-scheme))
+ (elpher-address-to-url address))))
+ (unless (string-empty-p (string-trim url))
+ (elpher-visit-page (elpher-page-from-url url)))))
(defun elpher-redraw ()
"Redraw current page."
(defun elpher-view-raw ()
"View raw server response for current page."
(interactive)
- (if (elpher-address-special-p (elpher-page-address elpher-current-page))
+ (if (elpher-address-about-p (elpher-page-address elpher-current-page))
(error "This page was not generated by a server")
(elpher-visit-page elpher-current-page
#'elpher-render-raw)))
(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-about-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 ()
"Download the current page."
(interactive)
- (if (elpher-address-special-p (elpher-page-address elpher-current-page))
+ (if (elpher-address-about-p (elpher-page-address elpher-current-page))
(error "Cannot download %s"
(elpher-page-display-string elpher-current-page))
(elpher-visit-page (elpher-make-page
#'elpher-render-download
t)))
-(defun elpher-build-link-map ()
+(defun elpher--build-link-map ()
"Build alist mapping link names to destination pages in current buffer."
(let ((link-map nil)
(b (next-button (point-min) t)))
(defun elpher-jump ()
"Select a directory entry by name. Similar to the info browser (m)enu command."
(interactive)
- (let* ((link-map (elpher-build-link-map)))
+ (let* ((link-map (elpher--build-link-map)))
(if link-map
(let ((key (let ((completion-ignore-case t))
(completing-read "Directory item/link: "
(goto-char (button-start b))
(button-activate b)))))))
-(defun elpher-jump-to-number (n)
- "Jump to directory entry number N."
- (interactive "nDirectory item/link number: ")
- (let* ((link-map (reverse (elpher-build-link-map))))
- (if link-map
- (if (<= 1 n (length link-map))
- (let ((b (cdr (elt link-map (- n 1)))))
- (goto-char (button-start b))
- (button-activate b))
- (error "No link with that number")))))
-
(defun elpher-root-dir ()
"Visit root of current server."
(interactive)
(let ((address (elpher-page-address elpher-current-page)))
- (if (not (elpher-address-special-p address))
+ (if (not (elpher-address-about-p address))
(if (or (member (url-filename address) '("/" ""))
(and (elpher-address-gopher-p address)
(= (length (elpher-gopher-address-selector address)) 0)))
(error "Command invalid for %s" (elpher-page-display-string elpher-current-page)))))
(defun elpher-info-page (page)
- "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)))))
+ "Display URL of PAGE in minibuffer."
+ (let* ((address (elpher-page-address page))
+ (url (elpher-address-to-url address))
+ (iri (elpher-address-to-iri address)))
+ (if (equal url iri)
+ (message "%s" url)
+ (message "%s (Raw: %s)" iri url))))
(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 "^") 'elpher-back)
(define-key map [mouse-3] 'elpher-back)
(define-key map (kbd "U") 'elpher-back-to-start)
- (define-key map (kbd "O") 'elpher-root-dir)
(define-key map (kbd "g") 'elpher-go)
(define-key map (kbd "o") 'elpher-go-current)
- (define-key map (kbd "s") 'elpher-history)
- (define-key map (kbd "S") 'elpher-history-all)
+ (define-key map (kbd "O") 'elpher-root-dir)
+ (define-key map (kbd "s") 'elpher-show-history)
+ (define-key map (kbd "S") 'elpher-show-visited-pages)
(define-key map (kbd "r") 'elpher-redraw)
(define-key map (kbd "R") 'elpher-reload)
(define-key map (kbd "T") 'elpher-toggle-tls)
(define-key map (kbd "d") 'elpher-download)
(define-key map (kbd "D") 'elpher-download-current)
(define-key map (kbd "m") 'elpher-jump)
- (define-key map (kbd "M") 'elpher-jump-to-number)
(define-key map (kbd "i") 'elpher-info-link)
(define-key map (kbd "I") 'elpher-info-current)
(define-key map (kbd "c") 'elpher-copy-link-url)
(define-key map (kbd "C") 'elpher-copy-current-url)
- (define-key map (kbd "a") 'elpher-set-bookmark-no-overwrite)
- (define-key map (kbd "A") 'bookmark-set-no-overwrite)
- (define-key map (kbd "B") 'bookmark-bmenu-list)
+ (define-key map (kbd "a") 'elpher-bookmark-link)
+ (define-key map (kbd "A") 'elpher-bookmark-current)
+ (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 "^") 'elpher-back
[mouse-3] 'elpher-back
(kbd "U") 'elpher-back-to-start
- (kbd "o") 'elpher-go
- (kbd "O") 'elpher-go-current
+ (kbd "g") 'elpher-go
+ (kbd "o") 'elpher-go-current
+ (kbd "O") 'elpher-root-dir
+ (kbd "s") 'elpher-show-history
+ (kbd "S") 'elpher-show-visited-pages
(kbd "r") 'elpher-redraw
(kbd "R") 'elpher-reload
(kbd "T") 'elpher-toggle-tls
(kbd "d") 'elpher-download
(kbd "D") 'elpher-download-current
(kbd "m") 'elpher-jump
- (kbd "M") 'elpher-jump-to-number
(kbd "i") 'elpher-info-link
(kbd "I") 'elpher-info-current
(kbd "c") 'elpher-copy-link-url
(kbd "C") 'elpher-copy-current-url
- (kbd "a") 'elpher-set-bookmark-no-overwrite
- (kbd "A") 'bookmark-set-no-overwrite
- (kbd "B") 'bookmark-bmenu-list
+ (kbd "a") 'elpher-bookmark-link
+ (kbd "A") 'elpher-bookmark-current
+ (kbd "B") 'elpher-show-bookmarks
(kbd "!") 'elpher-set-gopher-coding-system
(kbd "F") 'elpher-forget-current-certificate))
map)
This mode is automatically enabled by the interactive
functions which initialize the client, namely
`elpher', and `elpher-go'."
- (setq-local elpher--gemini-page-headings nil)
(setq-local elpher-current-page nil)
(setq-local elpher-history nil)
(setq-local elpher-buffer-name (buffer-name))
(setq-local bookmark-make-record-function #'elpher-bookmark-make-record)
- (setq-local imenu-create-index-function (lambda () elpher--gemini-page-headings)))
+ (setq-local imenu-create-index-function #'elpher-build-current-imenu-index))
(when (fboundp 'evil-set-initial-state)
(evil-set-initial-state 'elpher-mode 'motion))
The Lambda Lab / projects / elpher.git / blobdiff