X-Git-Url: https://thelambdalab.xyz/gitweb/index.cgi?p=elpher.git;a=blobdiff_plain;f=elpher.el;h=2f39db6ea545da6a0eed123c8e65cfa38dcf5b95;hp=dec79ae52c2c3f535a714871c95f019e1c154cff;hb=353c196e4744d456abc9fb927bdc7a40ba8112a0;hpb=04594c95ceb8c6818a3f901c636be4dc17a1aff1 diff --git a/elpher.el b/elpher.el index dec79ae..2f39db6 100644 --- a/elpher.el +++ b/elpher.el @@ -1,10 +1,10 @@ -;;; elpher.el --- A friendly gopher client -*- lexical-binding:t -*- +;;; elpher.el --- A friendly gopher and gemini client -*- lexical-binding:t -*- ;; Copyright (C) 2019 Tim Vaughan -;; Author: Tim Vaughan +;; Author: Tim Vaughan ;; Created: 11 April 2019 -;; Version: 2.6.1 +;; Version: 2.7.4 ;; Keywords: comm gopher ;; Homepage: http://thelambdalab.xyz/elpher ;; Package-Requires: ((emacs "26")) @@ -26,8 +26,8 @@ ;;; Commentary: -;; Elpher aims to provide a practical and friendly gopher client -;; for GNU Emacs. It supports: +;; Elpher aims to provide a practical and friendly gopher and gemini +;; client for GNU Emacs. It supports: ;; - intuitive keyboard and mouse-driven browsing, ;; - out-of-the-box compatibility with evil-mode, @@ -36,7 +36,7 @@ ;; - pleasant and configurable colouring of Gopher directories, ;; - direct visualisation of image files, ;; - a simple bookmark management system, -;; - connections using TLS encryption, +;; - gopher connections using TLS encryption, ;; - the fledgling Gemini protocol, ;; - the greybeard Finger protocol. @@ -64,12 +64,13 @@ (require 'subr-x) (require 'dns) (require 'ansi-color) +(require 'nsm) ;;; Global constants ;; -(defconst elpher-version "2.6.1" +(defconst elpher-version "2.7.4" "Current version of elpher.") (defconst elpher-margin-width 6 @@ -105,8 +106,58 @@ "A gopher client." :group 'applications) +;; General appearance and customizations + +(defcustom elpher-open-urls-with-eww nil + "If non-nil, open URL selectors using eww. +Otherwise, use the system browser via the BROWSE-URL function." + :type '(boolean)) + +(defcustom elpher-use-header t + "If non-nil, display current page information in buffer header." + :type '(boolean)) + +(defcustom elpher-auto-disengage-TLS nil + "If non-nil, automatically disengage TLS following an unsuccessful connection. +While enabling this may seem convenient, it is also potentially dangerous as it +allows switching from an encrypted channel back to plain text without user input." + :type '(boolean)) + +(defcustom elpher-connection-timeout 5 + "Specifies the number of seconds to wait for a network connection to time out." + :type '(integer)) + +(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." + :type '(boolean)) + +(defcustom elpher-gemini-TLS-cert-checks nil + "If non-nil, verify gemini server TLS certs using the default security level. +Otherwise, certificate verification is disabled. + +This defaults to off because it is standard practice for Gemini servers +to use self-signed certificates, meaning that most servers provide what +EMACS considers to be an invalid certificate." + :type '(boolean)) + +(defcustom elpher-gemini-max-fill-width 80 + "Specify the maximum default width (in columns) of text/gemini documents. +The actual width used is the minimum of this value and the window width at +the time when the text is rendered." + :type '(integer)) + +(defcustom elpher-bookmarks-file (locate-user-emacs-file "elpher-bookmarks") + "Specify the name of the file where elpher bookmarks will be saved." + :type '(file)) + ;; Face customizations +(defgroup elpher-faces nil + "Elpher face customizations." + :group 'elpher) + (defface elpher-index '((t :inherit font-lock-keyword-face)) "Face used for directory type directory records.") @@ -133,7 +184,7 @@ (defface elpher-gemini '((t :inherit font-lock-regexp-grouping-backslash)) - "Face used for html type directory records.") + "Face used for Gemini type directory records.") (defface elpher-other-url '((t :inherit font-lock-comment-face)) @@ -159,32 +210,17 @@ '((t :inherit shadow)) "Face used for brackets around directory margin key.") -;; Other customizations +(defface elpher-gemini-heading1 + '((t :inherit bold :height 1.8)) + "Face used for gemini heading level 1.") -(defcustom elpher-open-urls-with-eww nil - "If non-nil, open URL selectors using eww. -Otherwise, use the system browser via the BROWSE-URL function." - :type '(boolean)) - -(defcustom elpher-use-header t - "If non-nil, display current page information in buffer header." - :type '(boolean)) - -(defcustom elpher-auto-disengage-TLS nil - "If non-nil, automatically disengage TLS following an unsuccessful connection. -While enabling this may seem convenient, it is also potentially dangerous as it -allows switching from an encrypted channel back to plain text without user input." - :type '(boolean)) +(defface elpher-gemini-heading2 + '((t :inherit bold :height 1.5)) + "Face used for gemini heading level 2.") -(defcustom elpher-connection-timeout 5 - "Specifies the number of seconds to wait for a network connection to time out." - :type '(integer)) - -(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." - :type '(boolean)) +(defface elpher-gemini-heading3 + '((t :inherit bold :height 1.2)) + "Face used for gemini heading level 3.") ;;; Model ;; @@ -229,6 +265,7 @@ The basic attributes include: TYPE, SELECTOR, HOST and PORT. If the optional attribute TLS is non-nil, the address will be marked as requiring gopher-over-TLS." (cond + ((equal type ?i) nil) ((and (equal type ?h) (string-prefix-p "URL:" selector)) (elpher-address-from-url (elt (split-string selector "URL:") 1))) @@ -356,6 +393,10 @@ If no address is defined, returns 0. (This is for compatibility with the URL li "Retrieve the address corresponding to PAGE." (elt page 1)) +(defun elpher-page-set-address (page new-address) + "Set the address corresponding to PAGE to NEW-ADDRESS." + (setcar (cdr page) new-address)) + (defvar elpher-current-page nil) (defvar elpher-history nil) @@ -392,7 +433,7 @@ unless NO-HISTORY is non-nil." (let ((previous-page (pop elpher-history))) (if previous-page (elpher-visit-page previous-page nil t) - (error "No previous page.")))) + (error "No previous page")))) (defun elpher-reload-current-page () "Reload the current page, discarding any existing cached content." @@ -434,6 +475,8 @@ unless NO-HISTORY is non-nil." (list 'with-current-buffer "*elpher*" '(elpher-mode) (append (list 'let '((inhibit-read-only t)) + '(setq-local network-security-level + (default-value 'network-security-level)) '(erase-buffer) '(elpher-update-header)) args))) @@ -507,6 +550,8 @@ to ADDRESS." (port (elpher-address-port address)) (host (elpher-address-host address)) (selector-string-parts nil) + (bytes-received 0) + (hkbytes-received 0) (proc (open-network-stream "elpher-process" nil (if force-ipv4 (dns-query host) host) @@ -537,7 +582,21 @@ to ADDRESS." (set-process-coding-system proc 'binary) (set-process-filter proc (lambda (_proc string) - (cancel-timer timer) + (when timer + (cancel-timer timer) + (setq timer nil)) + (setq bytes-received (+ bytes-received (length string))) + (let ((new-hkbytes-received (/ bytes-received 102400))) + (when (> new-hkbytes-received hkbytes-received) + (setq hkbytes-received new-hkbytes-received) + (with-current-buffer "*elpher*" + (let ((inhibit-read-only t)) + (goto-char (point-min)) + (beginning-of-line 2) + (delete-region (point) (point-max)) + (insert "(" + (number-to-string (/ hkbytes-received 10.0)) + " MB read)"))))) (setq selector-string-parts (cons string selector-string-parts)))) (set-process-sentinel proc @@ -552,7 +611,9 @@ to ADDRESS." (concat (elpher-gopher-address-selector address) "\r\n")))) (t - (cancel-timer timer) + (when timer + (cancel-timer timer) + (setq timer nil)) (funcall renderer (apply #'concat (reverse selector-string-parts))) (elpher-restore-pos))) @@ -572,7 +633,7 @@ once they are retrieved from the gopher server." (insert content) (elpher-restore-pos)) (elpher-with-clean-buffer - (insert "LOADING... (use 'u' to cancel)")) + (insert "LOADING... (use 'u' to cancel)\n")) (condition-case the-error (elpher-get-selector address renderer) (error @@ -638,7 +699,7 @@ If ADDRESS is not supplied or nil the record is rendered as an 'follow-link t 'help-echo (elpher-page-button-help page))) (pcase type - ((or '(gopher ?i) 'nil) ;; Information + ('nil ;; Information (elpher-insert-margin) (let ((propertized-display-string (propertize display-string 'face 'elpher-info))) @@ -771,7 +832,9 @@ The response is rendered using the rendering function RENDERER." (if (not data) nil (let* ((address (elpher-page-address elpher-current-page)) - (selector (elpher-gopher-address-selector address))) + (selector (if (elpher-address-gopher-p address) + (elpher-gopher-address-selector address) + (elpher-address-filename address)))) (elpher-visit-previous-page) ; Do first in case of non-local exits. (let* ((filename-proposal (file-name-nondirectory selector)) (filename (read-file-name "Download complete. Save file as: " @@ -804,6 +867,8 @@ The response is rendered using the rendering function RENDERER." "Retrieve gemini ADDRESS, then render using RENDERER. If FORCE-IPV4 is non-nil, explicitly look up and use IPv4 address corresponding to ADDRESS." + (unless elpher-gemini-TLS-cert-checks + (setq-local network-security-level 'low)) (if (not (gnutls-available-p)) (error "Cannot establish gemini connection: GnuTLS not available") (unless (< (elpher-address-port address) 65536) @@ -813,6 +878,8 @@ to ADDRESS." (port (elpher-address-port address)) (host (elpher-address-host address)) (response-string-parts nil) + (bytes-received 0) + (hkbytes-received 0) (proc (open-network-stream "elpher-process" nil (if force-ipv4 (dns-query host) host) @@ -833,6 +900,18 @@ to ADDRESS." (when timer (cancel-timer timer) (setq timer nil)) + (setq bytes-received (+ bytes-received (length string))) + (let ((new-hkbytes-received (/ bytes-received 102400))) + (when (> new-hkbytes-received hkbytes-received) + (setq hkbytes-received new-hkbytes-received) + (with-current-buffer "*elpher*" + (let ((inhibit-read-only t)) + (goto-char (point-min)) + (beginning-of-line 2) + (delete-region (point) (point-max)) + (insert "(" + (number-to-string (/ hkbytes-received 10.0)) + " MB read)"))))) (setq response-string-parts (cons string response-string-parts)))) (set-process-sentinel proc @@ -858,7 +937,7 @@ to ADDRESS." renderer) (elpher-restore-pos))) (error - (elpher-network-error address the-error)))))) + (elpher-network-error address the-error)))))) (error (error "Error initiating connection to server"))))) @@ -904,6 +983,7 @@ that the response was malformed." "gemini")) (error "Server tried to automatically redirect to non-gemini URL: %s" response-meta)) + (elpher-page-set-address elpher-current-page redirect-address) (add-to-list 'elpher-gemini-redirect-chain redirect-address) (elpher-get-gemini-response redirect-address renderer))) (?4 ; Temporary failure @@ -928,7 +1008,7 @@ that the response was malformed." (insert content) (elpher-restore-pos)) (elpher-with-clean-buffer - (insert "LOADING GEMINI... (use 'u' to cancel)")) + (insert "LOADING GEMINI... (use 'u' to cancel)\n")) (setq elpher-gemini-redirect-chain nil) (elpher-get-gemini-response address renderer)) (error @@ -967,19 +1047,25 @@ that the response was malformed." ((pred (string-prefix-p "image/")) (elpher-render-image body)) (_other - (error "Unsupported MIME type %S" mime-type)))))) - -(defun elpher-gemini-get-link-url (line) - "Extract the url portion of LINE, a gemini map file link line." - (string-trim (elt (split-string (substring line 2)) 0))) - -(defun elpher-gemini-get-link-display-string (line) - "Extract the display string portion of LINE, a gemini map file link line." - (let* ((rest (string-trim (elt (split-string line "=>") 1))) + (elpher-render-download body)))))) + +(defun elpher-gemini-get-link-url (link-line) + "Extract the url portion of LINK-LINE, a gemini map file link line. +Returns nil in the event that the contents of the line following the +=> prefix are empty." + (let ((l (split-string (substring link-line 2)))) + (if l + (string-trim (elt l 0)) + nil))) + +(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." + (let* ((rest (string-trim (elt (split-string link-line "=>") 1))) (idx (string-match "[ \t]" rest))) - (if idx - (string-trim (substring rest (+ idx 1))) - ""))) + (string-trim (if idx + (substring rest (+ idx 1)) + rest)))) (defun elpher-collapse-dot-sequences (filename) "Collapse dot sequences in FILENAME. @@ -1016,43 +1102,56 @@ For instance, the filename /a/b/../c/./d will reduce to /a/c/d" 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 (let ((s (elpher-gemini-get-link-display-string link-line))) - (if (string-empty-p s) url s))) + (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)))) - (insert "→ ") - (if type-map-entry - (let* ((face (elt type-map-entry 3)) - (filtered-display-string (ansi-color-filter-apply display-string)) - (page (elpher-make-page filtered-display-string address))) - (insert-text-button filtered-display-string - 'face face - 'elpher-page page - 'action #'elpher-click-link - 'follow-link t - 'help-echo (elpher-page-button-help page))) - (insert (propertize display-string 'face 'elpher-unknown))) - (insert "\n"))) + (when display-string + (insert "→ ") + (if type-map-entry + (let* ((face (elt type-map-entry 3)) + (filtered-display-string (ansi-color-filter-apply display-string)) + (page (elpher-make-page filtered-display-string address))) + (insert-text-button filtered-display-string + 'face face + 'elpher-page page + 'action #'elpher-click-link + 'follow-link t + 'help-echo (elpher-page-button-help page))) + (insert (propertize display-string 'face 'elpher-unknown))) + (insert "\n")))) (defun elpher-gemini-insert-header (header-line) - (insert header-line "\n")) - -(defun elpher--trim-prefix-p (prefix string) - (string-prefix-p prefix (string-trim-left string))) + "Insert header described by HEADER-LINE into a text/gemini document. +The gemini map file line describing the header is given +by HEADER-LINE." + (when (string-match "^\\(#+\\)[ \t]*" header-line) + (let ((level (length (match-string 1 header-line))) + (header (substring header-line (match-end 0)))) + (unless (display-graphic-p) + (insert (make-string level ?#) " ")) + (insert (propertize header 'face + (pcase level + (1 'elpher-gemini-heading1) + (2 'elpher-gemini-heading2) + (3 'elpher-gemini-heading3) + (_ 'default))) + "\n")))) (defun elpher-render-gemini-map (data _parameters) "Render DATA as a gemini map file, PARAMETERS is currently unused." (elpher-with-clean-buffer (let ((preformatted nil)) (auto-fill-mode 1) + (setq-local fill-column (min (window-width) elpher-gemini-max-fill-width)) (dolist (line (split-string data "\n")) (cond - ((elpher--trim-prefix-p "```" line) (setq preformatted (not preformatted))) + ((string-prefix-p "```" line) (setq preformatted (not preformatted))) (preformatted (insert (elpher-process-text-for-display line) "\n")) - ((elpher--trim-prefix-p "=>" line) (elpher-gemini-insert-link line)) - ((elpher--trim-prefix-p "#" line) (elpher-gemini-insert-header line)) + ((string-prefix-p "=>" line) (elpher-gemini-insert-link line)) + ((string-prefix-p "#" line) (elpher-gemini-insert-header line)) (t (insert (elpher-process-text-for-display line)) (newline))))) (elpher-cache-content (elpher-page-address elpher-current-page) @@ -1077,7 +1176,7 @@ For instance, the filename /a/b/../c/./d will reduce to /a/c/d" (insert content) (elpher-restore-pos)) (elpher-with-clean-buffer - (insert "LOADING... (use 'u' to cancel)")) + (insert "LOADING... (use 'u' to cancel)\n")) (condition-case the-error (let* ((kill-buffer-query-functions nil) (user (let ((filename (elpher-address-filename address))) @@ -1107,7 +1206,9 @@ For instance, the filename /a/b/../c/./d will reduce to /a/c/d" (set-process-coding-system proc 'binary) (set-process-filter proc (lambda (_proc string) - (cancel-timer timer) + (when timer + (cancel-timer timer) + (setq timer nil)) (setq selector-string-parts (cons string selector-string-parts)))) (set-process-sentinel proc @@ -1121,7 +1222,9 @@ For instance, the filename /a/b/../c/./d will reduce to /a/c/d" proc (concat user "\r\n")))) (t - (cancel-timer timer) + (when timer + (cancel-timer timer) + (setq timer nil)) (funcall renderer (apply #'concat (reverse selector-string-parts))) (elpher-restore-pos))))))) @@ -1169,7 +1272,7 @@ For instance, the filename /a/b/../c/./d will reduce to /a/c/d" (error "Command not supported for start page")) (elpher-with-clean-buffer (insert " --------------------------------------------\n" - " Elpher Gopher Client \n" + " Elpher Gopher and Gemini Client \n" " version " elpher-version "\n" " --------------------------------------------\n" "\n" @@ -1180,7 +1283,7 @@ For instance, the filename /a/b/../c/./d will reduce to /a/c/d" " - m: select an item on current page by name (autocompletes)\n" " - u/mouse-3: return to previous page\n" " - o/O: visit different selector or the root menu of the current server\n" - " - g: go to a particular gopher address\n" + " - g: go to a particular address (gopher, gemini, finger)\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" @@ -1193,13 +1296,17 @@ For instance, the filename /a/b/../c/./d will reduce to /a/c/d" " - T: toggle TLS gopher mode\n" " - .: display the raw server response for the current page\n" "\n" - "Start your exploration of gopher space:\n") + "Start your exploration of gopher space and gemini:\n") (elpher-insert-index-record "Floodgap Systems Gopher Server" (elpher-make-gopher-address ?1 "" "gopher.floodgap.com" 70)) + (elpher-insert-index-record "Project Gemini home page" + (elpher-address-from-url "gemini://gemini.circumlunar.space/")) (insert "\n" - "Alternatively, select the following item and enter some search terms:\n") - (elpher-insert-index-record "Veronica-2 Gopher Search Engine" + "Alternatively, select a search engine and enter some search terms:\n") + (elpher-insert-index-record "Gopher Search Engine (Veronica-2)" (elpher-make-gopher-address ?7 "/v2/vs" "gopher.floodgap.com" 70)) + (elpher-insert-index-record "Gemini Search Engine (GUS)" + (elpher-address-from-url "gemini://gus.guru/search")) (insert "\n" "This page contains your bookmarked sites (also visit with B):\n") (elpher-insert-index-record "Your Bookmarks" 'bookmarks) @@ -1250,7 +1357,7 @@ For instance, the filename /a/b/../c/./d will reduce to /a/c/d" "- a: rename selected bookmark\n" "\n" "Bookmarks are stored in the file ") - (let ((filename (locate-user-emacs-file "elpher-bookmarks")) + (let ((filename elpher-bookmarks-file) (help-string "RET,mouse-1: Open bookmarks file in new buffer for editing.")) (insert-text-button filename 'face 'link @@ -1287,7 +1394,7 @@ bookmark list, while URL is the url of the entry." (defun elpher-save-bookmarks (bookmarks) "Record the bookmark list BOOKMARKS to the user's bookmark file. Beware that this completely replaces the existing contents of the file." - (with-temp-file (locate-user-emacs-file "elpher-bookmarks") + (with-temp-file elpher-bookmarks-file (erase-buffer) (insert "; Elpher bookmarks file\n\n" "; Bookmarks are stored as a list of (label URL) items.\n" @@ -1300,7 +1407,7 @@ Beware that this completely replaces the existing contents of the file." (let ((bookmarks (with-temp-buffer (ignore-errors - (insert-file-contents (locate-user-emacs-file "elpher-bookmarks")) + (insert-file-contents elpher-bookmarks-file) (goto-char (point-min)) (read (current-buffer)))))) (if (and bookmarks (listp (cadar bookmarks))) @@ -1590,6 +1697,7 @@ When run interactively HOST-OR-URL is read from the minibuffer." (let ((map (make-sparse-keymap))) (define-key map (kbd "TAB") 'elpher-next-link) (define-key map (kbd "") 'elpher-prev-link) + (define-key map (kbd "C-M-i") 'elpher-prev-link) (define-key map (kbd "u") 'elpher-back) (define-key map [mouse-3] 'elpher-back) (define-key map (kbd "O") 'elpher-root-dir)