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#+title: Web browsing using eww
* Integration with browse-url and afio
#+begin_src emacs-lisp
(defun jao-eww-browse-url (url &rest r)
"Browse URL using eww."
(jao-afio--goto-www)
(select-window (frame-first-window))
(let* ((url (url-encode-url url))
(bf (seq-find `(lambda (b)
(with-current-buffer b
(string= ,url
(url-encode-url (eww-current-url)))))
(jao-eww-session--list-buffers))))
(cond (bf (switch-to-buffer bf))
((string-match-p url "^file://") (eww-open-file url))
(t (eww url 4)))))
(setq jao-browse-url-function #'jao-eww-browse-url)
(setq browse-url-browser-function jao-browse-url-function)
(setq eww-use-browse-url "^\\(gemini\\|gopher\\):")
#+end_src
* Email
#+begin_src emacs-lisp
(defun jao-eww-html-renderer (handle)
(let ((shr-use-colors nil)
(shr-use-fonts nil)
;; (mm-html-blocked-images nil)
(fill-column (min (window-width) 110)))
(mm-shr handle)))
(setq mm-text-html-renderer 'jao-eww-html-renderer)
#+end_src
* Buffer names
#+begin_src emacs-lisp
(defun jao-eww--title ()
(if (eq "" (plist-get eww-data :title))
(plist-get eww-data :url)
(plist-get eww-data :title)))
(defun jao-eww--rename-buffer ()
(let ((name (truncate-string-to-width (jao-eww--title) 90 nil nil t)))
(rename-buffer (format "*%s # eww*" name) t)))
(add-hook 'eww-after-render-hook #'jao-eww--rename-buffer)
(advice-add 'eww-back-url :after #'jao-eww--rename-buffer)
(advice-add 'eww-forward-url :after #'jao-eww--rename-buffer)
#+end_src
* Opening URLs
#+begin_src emacs-lisp
(defun jao-eww-browse (arg)
(interactive "P" eww-mode)
(setq eww-prompt-history
(cl-remove-duplicates eww-prompt-history :test #'string=))
(let ((url (completing-read (if arg "eww in new buffer: " "eww: ")
eww-prompt-history nil nil nil
'eww-prompt-history (eww-current-url))))
(eww url (when arg 4))))
(defun jao-eww-browse-new ()
(interactive nil eww-mode)
(jao-eww-browse t))
(defun jao-eww-reload (images)
(interactive "P" eww-mode)
(if images
(let ((shr-blocked-images nil))
(eww-reload t))
(call-interactively 'eww-reload)))
#+end_src
* Images
#+begin_src emacs-lisp
(defun jao-eww-next-image ()
(interactive nil eww-mode)
(when-let (p (text-property-search-forward 'image-displayer nil nil t))
(goto-char (prop-match-beginning p))))
#+end_src
* Close page and reopen
#+begin_src emacs-lisp
(defvar jao-eww--closed-urls ())
(defun jao-eww-close ()
(interactive nil eww-mode)
(when-let (current (eww-current-url))
(add-to-list 'jao-eww--closed-urls current))
(let ((nxt (car (jao-eww-session-invisible-buffers))))
(kill-current-buffer)
(when nxt (switch-to-buffer nxt nil t))))
(defun jao-eww-reopen (arg)
(interactive "P")
(if (> (length jao-eww--closed-urls) 0)
(let ((url (completing-read "URL: " jao-eww--closed-urls)))
(jao-afio--goto-www)
(setq jao-eww--closed-urls (remove url jao-eww--closed-urls))
(eww url (when arg 4)))
(message "No previously closed URLs.")))
(defun jao-eww-reopen-new ()
(interactive)
(jao-eww-reopen t))
#+end_src
* Visiting links in a page
#+begin_src emacs-lisp
(defun jao-eww-copy-link ()
(interactive)
(when-let (lnk (or (car (eww-links-at-point)) (eww-current-url)))
(message "%s" lnk)
(kill-new lnk)))
(defun jao-eww--at-link ()
(and (get-text-property (point) 'shr-url)
(not (get-text-property (point) 'eww-form))))
(defun jao-eww--previous-url ()
(text-property-search-backward 'shr-url nil nil t))
(defun jao-eww--pp-link ()
(format "%s @ %s"
(button-label (point))
(propertize (get-text-property (point) 'shr-url) 'face 'link)))
(defun jao-eww-visit-url-on-page (&optional arg)
"Visit URL from list of links in the page using completion."
(interactive "P")
(when (derived-mode-p 'eww-mode)
(let ((links))
(save-excursion
(goto-char (point-max))
(while (jao-eww--previous-url)
(when (jao-eww--at-link) (push (jao-eww--pp-link) links))))
(let* ((selection (completing-read "Browse: " links nil t))
(url (replace-regexp-in-string ".*@ " "" selection)))
(eww url (if arg 4 nil))))))
(defun jao-eww-jump-to-url-on-page ()
"Jump to URL position in the page using completion."
(interactive)
(when (derived-mode-p 'eww-mode)
(let ((links))
(save-excursion
(goto-char (point-max))
(while (jao-eww--previous-url)
(when (jao-eww--at-link)
(push (format "%s ~ %d" (jao-eww--pp-link) (point)) links))))
(let* ((selection (completing-read "Jump to URL in page: " links nil t))
(position (replace-regexp-in-string ".*~ " "" selection))
(point (string-to-number position)))
(goto-char point)))))
(defun jao-eww--append-html (oldfn &rest args)
(let ((p (apply oldfn args)))
(when (stringp p)
(let ((r (if (string-match-p ".*\\.html$" p) p (concat p ".html"))))
(kill-new (format "[[doc:%s]]" r))
r))))
(advice-add 'eww-make-unique-file-name :around #'jao-eww--append-html)
#+end_src
* eww-lnum
#+begin_src emacs-lisp
(use-package eww-lnum :ensure t)
#+end_src
* Sessions
#+begin_src emacs-lisp
(use-package jao-eww-session
:custom ((jao-eww-session-duplicate-tabs 'ask)
(jao-eww-session-file "~/.emacs.d/cache/eww-session.eld")))
#+end_src
* Package
#+begin_src emacs-lisp
(use-package eww
:demand t
:custom ((eww-browse-url-new-window-is-tab nil)
(eww-download-directory jao-sink-dir)
(eww-header-line-format nil)
(eww-form-checkbox-selected-symbol "☒")
(shr-width nil)
(shr-use-colors nil)
(shr-use-fonts nil)
(shr-max-width 130)
(shr-blocked-images ".*")
(shr-inhibit-images t)
(shr-max-image-proportion 0.9))
:config
(with-eval-after-load "org" (require 'ol-eww nil t))
:bind (:map eww-mode-map (("b" . eww-back-url)
("B" . eww-forward-url)
("c" . jao-eww-copy-link)
("d" . eww-download)
("D" . jao-download)
("f" . eww-lnum-follow)
("F" . eww-lnum-universal)
("j" . jao-eww-visit-url-on-page)
("J" . jao-eww-jump-to-url-on-page)
("L" . eww-forward-url)
("N" . jao-eww-next-image)
("o" . jao-eww-browse)
("O" . jao-eww-browse-new)
("r" . jao-eww-reload)
("s" . eww-search-words)
("S" . jao-eww-session-load)
("u" . jao-eww-reopen)
("U" . jao-eww-reopen-new)
("w" . org-eww-copy-for-org-mode)
("q" . jao-eww-close)
("x" . jao-rss-subscribe)
("y" . jao-eww-copy-link)
("C-c C-w" . jao-eww-close))))
#+end_src
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