From: plugd Date: Fri, 30 Jul 2021 19:55:37 +0000 (+0200) Subject: Reified special pages using "about:" pseudo-type. X-Git-Tag: v3.2.0~10 X-Git-Url: https://thelambdalab.xyz/gitweb/index.cgi?a=commitdiff_plain;h=34427dedd5270a954966fff20ac523131661e5c7;p=elpher.git Reified special pages using "about:" pseudo-type. --- diff --git a/elpher.el b/elpher.el index a82d1ba..7c68b5c 100644 --- a/elpher.el +++ b/elpher.el @@ -109,7 +109,8 @@ (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)) @@ -379,7 +380,7 @@ requiring gopher-over-TLS." (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." @@ -391,26 +392,31 @@ requiring gopher-over-TLS." "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." + (let ((type (url-type address))) + (and type + (listp type) + (eq (car type) 'special)))) (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))) @@ -432,18 +438,13 @@ For gopher addresses this is a combination of the selector type and selector." (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." @@ -480,10 +481,10 @@ If no address is defined, returns 0. (This is for compatibility with the URL li "Create a page with DISPLAY-STRING and ADDRESS." (list display-string address)) -(defun elpher-make-start-page () - "Create the start page." - (elpher-make-page "Elpher Start Page" - (elpher-make-special-address 'start))) +(defun elpher-make-welcome-page () + "Create the welcome page." + (elpher-make-page "Elpher Welcome Page" + (elpher-make-special-address 'welcome))) (defun elpher-page-display-string (page) "Retrieve the display string corresponding to PAGE." @@ -1273,8 +1274,7 @@ that the response was malformed." (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) @@ -1622,21 +1622,50 @@ The result is rendered using RENDERER." (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 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 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" @@ -2106,7 +2135,7 @@ When run interactively HOST-OR-URL is read from the minibuffer." (interactive) (setq-local elpher-current-page nil) (setq-local elpher-history nil) - (elpher-visit-page (elpher-make-start-page))) + (elpher-visit-page (elpher-make-welcome-page))) (defun elpher-download () "Download the link at point." @@ -2334,7 +2363,7 @@ to create a new session. Returns the buffer selected (or created)." (pop-to-buffer-same-window buf) (unless (buffer-modified-p) (elpher-mode) - (elpher-visit-page (elpher-make-start-page)) + (elpher-visit-page (elpher-make-welcome-page)) "Started Elpher."))); Otherwise (elpher) evaluates to start page string. ;;; elpher.el ends here