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;;; acdw.web.el --- Web browsing and such -*- lexical-binding: t; -*-
;;; Code:
(defcustom +browse-url-other-safe-browser-functions nil
"Other safe browser functions."
:type '(repeat function))
(defun +browse-url-browser-function-safe-p (f)
"Return t if F is a safe browser function."
(memq f (append +browse-url-other-safe-browser-functions
(mapcar (lambda (i)
(plist-get (cdr i) :value))
(seq-filter (lambda (i)
(eq (car i) 'function-item))
(cdr (get 'browse-url-browser-function
'custom-type)))))))
;;; URL matcher generators
(defun +browse-url-matches (&rest regexps)
"Return a lambda that will determine if a url matches REGEXPS.
Each regexp will be tested in turn. The first one that matches
is returned by the lambda.
This is a good function to use in key positions in `browse-url-handlers'."
`(lambda (url &optional new-window)
(cl-loop for regexp in ',regexps
if (string-match-p regexp url)
return regexp)))
;;; External URL handlers
(cl-defmacro +browse-url-make-external-viewer-handler
(viewer
&key
args
(prompt "URL: ")
(program (executable-find (format "%s" viewer)))
(name (intern (format "+browse-url-with-%s" viewer)))
doc
(var (intern (format "%s-args" name)))
vardoc
(custom-group '+browse-url)
(fallback '(function browse-url-generic)))
"Create a `browse-url' handler function calling PROGRAM on the URL.
This macro also creates a `customize' setting in CUSTOM-GROUP for
PROGRAM's command-line arguments. ARGS specifies the
default arguments for this user option.
PROGRAM defaults to the result of calling `executable-find' on VIEWER.
PROMPT is shown to the user in the function's `interactive' spec, as an argument
to `browse-url-interactive-arg'.
The resulting function is named NAME, which defaults to
`+browse-url-with-VIEWER'. The custom variable is named VAR, which defaults
to `NAME-args'. If DOC or VARDOC are provided, they'll be the documentation of
the function and variable respectively; otherwise a basic default doc-string is
used.
If FALLBACK is non-nil (the default is `browse-url-generic'), the
generated function will call FALLBACK if unable to start PROGRAM
for some reason."
(declare (indent 1))
`(progn
(defcustom ,var ,args
,(or vardoc (format "Arguments to pass to %s in `%s'."
viewer name))
:type '(repeat :tag "Command-line argument" string)
:group ',custom-group)
(defun ,name (url &optional new-window)
,(or doc (format "Open URL in %s." viewer))
(interactive (browse-url-interactive-arg ,prompt))
(let* ((url (browse-url-encode-url url))
(process-environment (browse-url-process-environment)))
(message ,(format "Opening %%s in %s..." viewer) url)
(unless (ignore-errors (apply #'start-process
(format "%s %s" ',viewer url)
nil
,program
(append ,var (list url))))
,@(cond
(fallback `((funcall ,fallback url new-window)))
(:else `((message "Can't find viewer: %s" ,viewer)
nil))))))))
;; Some default handlers
(+browse-url-make-external-viewer-handler mpv
:args '("--cache-pause-wait=15"
"--cache-pause-initial=yes")
:prompt "Video URL: ")
(+browse-url-make-external-viewer-handler mpv-image
:program (executable-find "mpv")
:args '("--image-display-duration=inf")
:prompt "Image URL: ")
;;; External domains
;; Some domains just don't open well in `eww'. The following function and user
;; option define an easy way to automatically open those.
(defcustom +browse-url-external-domains nil
"Domains to open in `browse-url-secondary-browser-function'.
This is just a list of strings. They'll be regexp-escaped and
passed to `+browse-url-external-url-p', which is a good function
to put in `browse-url-handlers'.
If an item in this list is a list itself, it should contain one string, a valid
regexp that will not be regexp-quoted when matching against a url."
:type '(repeat (choice
(list :tag "Regexp" regexp)
(string :tag "Literal string"))))
(defun +browse-url-external-url-p (url)
"Return t if URL is a member of `+browse-url-external-domains'.
This function only tests URL's domain."
(let ((host (url-host (url-generic-parse-url url))))
(cl-loop for domain in +browse-url-external-domains
if (string-match-p (if (stringp domain)
(regexp-quote domain)
(car domain))
host)
return t)))
;;; Downloading
(defcustom +browse-url-download-open t
"Whether to open downloaded files after downloading."
:type 'boolean)
(defun +browse-url-download (url &rest _)
"Download URL to `eww-download-directory'."
(interactive "sDownload URL: ")
(let ((dir eww-download-directory))
(when (functionp dir) (setq dir (funcall dir)))
(make-directory dir :parents)
(url-retrieve url
(lambda (s u d)
(let ((file (+browse-url-download-callback s u d)))
(when +browse-url-download-open
(browse-url-xdg-open file))))
(list url dir))))
(defun +browse-url-download-callback (status url dir)
;; A slight change to `eww-download-callback' that returns the downloaded
;; filename.
(unless (plist-get status :error)
(let* ((obj (url-generic-parse-url url))
(path (directory-file-name (car (url-path-and-query obj))))
(file (eww-make-unique-file-name
(eww-decode-url-file-name (file-name-nondirectory path))
dir)))
(goto-char (point-min))
(re-search-forward "\r?\n\r?\n")
(let ((coding-system-for-write 'no-conversion))
(write-region (point) (point-max) file))
(message "Saved %s" file)
file)))
;;; Packages
(use-package browse-url
:demand t
:config
(put 'browse-url-browser-function 'safe-local-variable
'+browse-url-browser-function-safe-p)
(setopt browse-url-browser-function #'eww-browse-url
;; Dispatch browser based on URL
browse-url-handlers
`(;; Videos
(,(+browse-url-matches "youtube\\.com" "yoiutu\\.be"
"invidious" "yewtu\\.be"
(rx "." (or "mp4" "gif" "mov" "MOV" "webm")
eos))
. +browse-url-with-mpv)
;; Music
(,(+browse-url-matches "soundcloud\\.com" "bandcamp\\.com"
(rx "." (or "ogg" "mp3" "opus" "m4a") eos))
. +browse-url-with-mpv)
;; Images
(,(+browse-url-matches "pbs\\.twimg\\.com"
(rx "." (or "jpeg" "jpg" "png" "bmp" "webp")
eos))
. +browse-url-with-mpv-image)
;; Blobs
(,(+browse-url-matches (rx "." (or ".tar.gz" ".pdf") eos))
. +browse-url-download)
;; External URLs --- see `+browse-url-external-domains'
(+browse-url-external-url-p
. ,browse-url-secondary-browser-function))
;; External domains
+browse-url-external-domains '("github.com" "gitlab.com" "codeberg.org"
"tildegit.org" "git.tilde.town"
"google.com" "imgur.com" "twitch.tv"
"pixelfed" "instagram.com"
"bibliogram.art" "reddit.com"
"teddit.net" "libreddit.de"
"streamable.com" "spotify.com"
"hetzner.cloud" "melpa.org"
"twitter.com" ("^t\\.co$")
"nitter.snopyta.org" "nitter.net"))
;; External browsers: firefox > chromium > chrome
(when-let ((firefox (choose-executable "firefox"
"firefox-esr")))
(setopt browse-url-firefox-program firefox
browse-url-firefox-new-window-is-tab t
browse-url-firefox-arguments '("--new-tab")
browse-url-generic-program firefox
browse-url-generic-args browse-url-firefox-arguments))
(when-let ((chromium (choose-executable "chromium")))
(setopt browse-url-chromium-program chromium
browse-url-generic-program chromium))
(when-let ((chrome (choose-executable "chrome"
"google-chrome-stable")))
(setopt browse-url-chrome-program chrome
browse-url-generic-program chrome)))
(provide 'acdw-web)
;;; acdw-web.el ends here
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