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;;; eww-conf.el --- My configurations for Emacs Web Wowser -*- lexical-binding: t; -*-
;;; Author: Durand
;;; Created: 2021-01-20
;;; Commentary:
;; Simply configurations for the great Emacs Web Wowser
;;; Code:
(require 'eww)
(require 'shr)
(setq eww-bookmarks-directory load-file-directory)
(setq eww-search-prefix "https://searx.lukesmith.xyz/search?q=")
(setq eww-restore-desktop t)
(setq eww-desktop-remove-duplicates t)
(setq eww-suggest-uris '(eww-links-at-point thing-at-point-url-at-point))
(setq eww-browse-url-new-window-is-tab nil)
;; key-bindings
(define-key global-map (vector ?\s-w) #'durand-eww-map)
;;;###autoload
(fset 'durand-eww-map
(let ((map (list 'keymap "EWW")))
(define-key map (vector ?b) #'eww-visit-bookmark)
(define-key map (vector ?e) #'eww-dwim)
map))
(define-key eww-link-keymap (kbd "v") nil) ; stop overriding `eww-view-source'
(define-key eww-mode-map (kbd "L") #'eww-list-bookmarks)
(define-key eww-mode-map (vector ?f) #'eww-find-feed)
(define-key eww-mode-map (vector ?b) #'eww-visit-bookmark)
(define-key eww-mode-map (vector ?e) #'eww-dwim)
(define-key eww-mode-map (vector ?o) #'eww-open-in-new-buffer)
(define-key eww-mode-map (vector ?E) #'eww-visit-url-on-page)
(define-key eww-mode-map (vector ?J) #'eww-jump-to-url-on-page)
(define-key eww-mode-map (vector ?m) #'eww-add-bookmark)
(define-key dired-mode-map (kbd "E") #'eww-open-file) ; to render local HTML files
(define-key eww-buffers-mode-map (kbd "d") #'eww-bookmark-kill) ; it actually deletes
(define-key eww-bookmark-mode-map (kbd "d") #'eww-bookmark-kill) ; same
(setq shr-use-colors nil) ; t is bad for accessibility
(setq shr-use-fonts nil) ; t is not for me
(setq shr-max-image-proportion 0.6)
(setq shr-image-animate nil) ; No GIFs, thank you!
(setq shr-width nil) ; check `prot-eww-readable'
(setq shr-discard-aria-hidden t)
(setq shr-cookie-policy nil)
;; This feels quicker.
(cond ((version<= "28" emacs-version))
((setq eww-retrieve-command '("wget" "--quiet" "--output-document=-"))))
(define-key eww-mode-map (vector 'C-tab)
#'durand-eww-goto-search-result)
;;;###autoload
(defun durand-eww-goto-search-result ()
"Go to the search results on a search page.
Otherwise, just go to the beginning of the page."
(interactive)
(save-match-data
(cond
((string-match-p "searx\\." (plist-get eww-data :url))
(re-search-forward "search results"))
((goto-char (point-min)))))
(recenter 0))
;;; the following are adapted from Protesilaos' dotemacs.
;;;###autoload
(defconst eww-name-separator "-"
"The separator between the title and the mark EWW in the \
names.")
;;;###autoload
(defun eww-rename-buffer ()
"Rename EWW buffer using page title or URL.
To be used by `eww-after-render-hook'."
(let ((name (cond
((and (plist-get eww-data :title)
(not (string= (plist-get eww-data :title) "")))
(plist-get eww-data :title))
((plist-get eww-data :url)))))
(rename-buffer (format "*%s %s eww*" name eww-name-separator) t)))
(add-hook 'eww-after-render-hook #'eww-rename-buffer)
(advice-add 'eww-back-url :after #'eww-rename-buffer)
(advice-add 'eww-forward-url :after #'eww-rename-buffer)
;;;###autoload
(defvar eww-visited-history nil
"History of visited URLs.")
;;;###autoload
(defun eww-record-history ()
"Store URL in `eww-visited-history'.
To be used by `eww-after-render-hook'."
(add-to-history 'eww-visited-history (plist-get eww-data :url)))
(add-hook 'eww-after-render-hook #'eww-record-history)
(advice-add 'eww-back-url :after #'eww-record-history)
(advice-add 'eww-forward-url :after #'eww-record-history)
;;;; Commands
;;;###autoload
(defun eww-dwim (url &optional arg)
"Visit a URL, maybe from `eww-prompt-history', with completion.
With optional prefix ARG (\\[universal-argument]) open URL in a
new eww buffer.
If URL does not look like a valid link, run a web query using
`eww-search-prefix'.
When called from an eww buffer, provide the current link as
default candidate."
(interactive
(list
(completing-read "Run EWW on: "
(delete-dups (append eww-visited-history eww-prompt-history))
nil nil nil 'eww-prompt-history (plist-get eww-data :url) t)
current-prefix-arg))
(eww url (cond (arg 4))))
;;;###autoload
(defun eww-visit-bookmark (&optional arg)
"Visit bookmarked URL.
With optional prefix ARG (\\[universal-argument]) open URL in a
new EWW buffer."
(interactive "P")
(eww-read-bookmarks)
(let ((candidates (mapcar
(lambda (element)
(plist-get element :url))
eww-bookmarks)))
(eww (completing-read "Visit EWW bookmark: " candidates)
(cond (arg 4)))))
;;;###autoload
(defun eww-visit-url-on-page (&optional arg)
"Visit URL from list of links on the page using completion.
With optional prefix ARG (\\[universal-argument]) open URL in a
new EWW buffer."
(interactive "P")
(cond
((derived-mode-p 'eww-mode)
(let (links)
(save-excursion
(goto-char (point-max))
(while (text-property-search-backward 'shr-url nil nil t)
(cond
((and (get-text-property (point) 'shr-url)
(not (get-text-property (point) 'eww-form)))
(setq links
(cons (format "%s @ %s"
(button-label (point))
(propertize (get-text-property (point) 'shr-url) 'face 'link))
links))))))
(let* ((selection (completing-read "Browse URL from page: " links nil t))
(match-ending (progn (string-match " @ " selection)
(match-end 0)))
(url (substring-no-properties selection match-ending)))
(eww url (cond (arg 4))))))))
;;;###autoload
(defun eww-jump-to-url-on-page ()
"Jump to URL position on the page using completion.
With optional prefix ARG (\\[universal-argument]) open URL in a
new EWW buffer."
(interactive)
(cond
((derived-mode-p 'eww-mode)
(let ((links))
(save-excursion
(goto-char (point-max))
(while (text-property-search-backward 'shr-url nil nil t)
(cond
((and (get-text-property (point) 'shr-url)
(not (get-text-property (point) 'eww-form)))
(setq links
(cons (format "%s @ %s ~ %d"
(button-label (point))
(propertize (get-text-property (point) 'shr-url) 'face 'link)
(point))
links))))))
(let* ((selection (completing-read "Jump to URL on page: " links nil t))
(match-ending (progn (string-match " ~ " selection)
(match-end 0)))
(position (string-to-number
(substring-no-properties selection match-ending))))
(goto-char position)
(durand-pulse-pulse-line))))))
(defvar eww-occur-feed-regexp
(concat "\\(rss\\|atom\\)\\+xml.\\(.\\|\n\\)"
".*href=[\"']\\(.*?\\)[\"']")
"Regular expression to match web feeds in HTML source.")
;;;###autoload
(defun eww-find-feed ()
"Produce bespoke buffer with RSS/Atom links from XML source."
(interactive)
(let* ((url (or (plist-get eww-data :start)
(plist-get eww-data :contents)
(plist-get eww-data :home)
(plist-get eww-data :url)))
(title (or (plist-get eww-data :title) url))
(source (plist-get eww-data :source))
(buf-name (format "*feeds: %s %s eww*" title
eww-name-separator))
(inhibit-read-only t)
(base-url (replace-regexp-in-string "\\(.*/\\)[^/]+\\'" "\\1" url)))
(cond
(source
(with-temp-buffer
(insert source)
(occur-1 eww-occur-feed-regexp "\\3" (list (current-buffer)) buf-name))
;; Comment by Protesilaos:
;; Handle relative URLs, so that we get an absolute URL out of them.
;; Findings like "rss.xml" are not particularly helpful.
;;
;; NOTE 2021-03-31: the base-url heuristic may not always be
;; correct, though it has worked in all websites I have tested it
;; in.
(cond
((get-buffer buf-name)
(with-current-buffer (get-buffer buf-name)
(goto-char (point-min))
(cond
((re-search-forward browse-url-button-regexp nil t))
((re-search-forward ".*" nil t)
(replace-match (concat base-url "\\&"))))))))
(t
;; Sometimes a page has no sources
(let ((nodes (dom-search
(plist-get eww-data :dom)
(lambda (node)
(and
(eq (dom-tag node) 'link)
(dom-attr node 'type)
(string-match "\\(?:rss\\|atom\\)\\+xml"
(dom-attr node 'type)))))))
(with-current-buffer (get-buffer-create buf-name)
(mapc (lambda (node)
(insert (dom-attr node 'title)
" - "
(dom-attr node 'href)
"\n"))
nodes))
(display-buffer (get-buffer buf-name)))))))
(provide 'eww-conf)
;;; eww-conf.el ends here
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