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#+title: Customizations for emacs-w3m

* browse-url and afio
  #+begin_src emacs-lisp
    (defun jao-w3m-find-url (url)
      (let* ((url (w3m-canonicalize-url url))
             (fn `(lambda (b)
                    (with-current-buffer b
                      (string= ,url (w3m-canonicalize-url w3m-current-url))))))
        (when-let (b (seq-find fn (w3m-list-buffers)))
          (pop-to-buffer b))))

    (defun jao-w3m-browse-url (url &rest r)
      (jao-afio--goto-www)
      (select-window (frame-first-window))
      (or (jao-w3m-find-url url)
          (w3m-goto-url-new-session url)))

    (defun jao-w3m-download (arg)
      (interactive "P")
      (jao-download (w3m-anchor) arg))

    (setq jao-afio-use-w3m t)
    (setq jao-browse-url-function 'jao-w3m-browse-url)
  #+end_src
* Org integration
  #+begin_src emacs-lisp
    (defun jao-w3m-get-link ()
      (let ((wb (w3m-alive-p)))
        (when wb
          (let ((url (with-current-buffer wb w3m-current-url))
                (title (w3m-buffer-title wb)))
            (cons url title)))))

    (defun jao-insert-w3m-link ()
      (interactive)
      (let ((link (jao-w3m-get-link)))
        (when link (insert "[[" (car link) "][" (cdr link) "]]"))))

    (with-eval-after-load "org"
      (require 'ol-w3m nil t)
      (define-key org-mode-map "\C-cW" 'jao-insert-w3m-link))
  #+end_src
* Capture page
  #+begin_src emacs-lisp
    (defun jao-w3m-capture-page ()
      (interactive)
      (let* ((title (w3m-current-title))
             (url w3m-current-url)
             (html (y-or-n-p "Save as HTML (y) or PS (n)? "))
             (basename (concat (read-string "File name: ")
                               (if html ".html" ".ps")))
             (name (expand-file-name basename jao-sink-dir)))
        (if html
            (progn
              (w3m-view-source)
              (write-region (point-min) (point-max) name nil nil nil t)
              (w3m-view-source))
          (progn
            (split-window-horizontally 85)
            (w3m-redisplay-this-page)
            (ps-print-buffer name)
            (delete-other-windows)
            (w3m-redisplay-this-page)))
        (kill-new (format "[[doc:%s][%s]] ([[%s][original]])"
                          basename title url))))
   #+end_src
* Email
  #+begin_src emacs-lisp
    (defun jao-w3m-gnus-html-renderer (handle)
      (let ((w3m-message-silent t)
            (mm-w3m-safe-url-regexp nil)
            (shr-use-colors nil)
            (shr-use-fonts nil)
            (fill-column (min (window-width) 110)))
        (condition-case nil
            (mm-inline-text-html-render-with-w3m handle)
          (error (delete-region (point) (point-max))
                 (mm-shr handle)))))

    (setq mm-text-html-renderer #'jao-w3m-gnus-html-renderer)

    (with-eval-after-load "gnus-art"
      (define-key gnus-article-mode-map "\C-ci" 'w3m-view-image)
      (define-key gnus-article-mode-map "z" 'w3m-lnum-zoom-in-image))
  #+end_src
* Narrowing
  #+begin_src emacs-lisp
    (with-eval-after-load "consult"
      (defvar jao-consult-w3m-buffer-history nil)
      (setq jao-consult-w3m-source
        (list :name "w3m buffer"
              :category 'w3m-buffer
              :hidden t
              :narrow (cons ?w "w3m")
              :annotate (lambda (b) (get-text-property 0 'url b))
              :history 'jao-consult-w3m-buffer-history
              :action (lambda (b)
                        (jao-afio--goto-www)
                        (switch-to-buffer (get-text-property 0 'buffer b)))
              :items (lambda ()
                       (seq-map (lambda (b)
                                  (with-current-buffer b
                                    (propertize w3m-current-title
                                                'buffer b
                                                'url w3m-current-url)))
                                (w3m-list-buffers)))))
      (when jao-afio-use-w3m (setq jao-consult-www-narrow ?w))
      (add-to-list 'consult-buffer-sources 'jao-consult-w3m-source t))
  #+end_src
* Package
  #+begin_src emacs-lisp
    (use-package w3m
      :ensure t
      :custom ((w3m-key-binding 'info)
               (w3m-display-mode 'dual-pane))
      :init
      (setq w3m-add-user-agent nil
            w3m-command "w3m"
            w3m-confirm-leaving-secure-page nil
            w3m-cookie-accept-bad-cookies t
            w3m-cookie-accept-domains '(".github.com"
                                        ".librarything.com"
                                        ".goodreads.com"
                                        ".sr.ht"
                                        ".gnu.org"
                                        ".codeberg.org"
                                        "codeberg.org"
                                        ".bookshop.org"
                                        ".reddit.com")
            w3m-cookie-reject-domains '(".")
            w3m-do-cleanup-temp-files t
            w3m-fill-column 110
            w3m-goto-article-function 'jao-w3m-browse-url
            w3m-form-input-textarea-buffer-lines 40
            w3m-history-minimize-in-new-session t
            w3m-history-reuse-history-elements nil
            w3m-image-no-idle-timer t
            w3m-make-new-session t
            w3m-profile-directory "~/.w3m"
            w3m-redisplay-pages-automatically-p nil
            w3m-resize-images t
            w3m-safe-url-regexp nil
            w3m-search-default-engine "duckduckgo" ; "google-en"
            w3m-select-buffer-horizontal-window nil
            w3m-select-buffer-window-ratio '(20 . 40)
            w3m-session-load-last-sessions t
            w3m-session-load-crashed-sessions 'ask
            w3m-show-graphic-icons-in-header-line nil
            w3m-show-graphic-icons-in-mode-line nil
            w3m-space-before-favicon "|"
            w3m-use-tab nil
            w3m-use-tab-line nil
            w3m-use-title-buffer-name t
            w3m-use-cookies t
            w3m-use-filter nil
            w3m-use-favicon nil
            w3m-use-header-line nil
            w3m-use-refresh nil
            w3m-use-symbol t)

      :config
      :bind (:map w3m-mode-map
                  (("+" . w3m-zoom-in-image)
                   ("-" . w3m-zoom-out-image)
                   ("C-c C-@" . tracking-next-buffer)
                   ("C-c C-SPC" . tracking-next-buffer)
                   ("C-c C-b" . nil)
                   ("C-c c" . jao-w3m-capture-page)
                   ("b" . w3m-view-previous-page)
                   ("B" . w3m-view-next-page)
                   ("c" . w3m-print-this-url)
                   ("d" . jao-w3m-download)
                   ("D" . w3m-download)
                   ("f" . w3m-lnum-follow)
                   ("v" . jao-view-video)
                   ("w" . org-w3m-copy-for-org-mode)
                   ("x" . jao-rss-subscribe)
                   ("y" . w3m-print-current-url))))
  #+end_src