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;; -*- lexical-binding: t -*-

;;; Integration with browse-url and afio
(defun jao-eww-browse-url (url &rest r)
  "Browse URL using eww."
  (if (derived-mode-p 'eww-mode)
      (eww url)
    (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 eww-use-browse-url "^\\(gemini\\|gopher\\):")

;;; Opening URLs
(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-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)))

;;; Consult narrowing
(with-eval-after-load "consult"
  (defvar jao-eww-consult-history nil)
  (defvar jao-eww-buffer-source
    (list :name "eww buffer"
          :category 'eww-buffer
          :hidden t
          :narrow (cons ?e "eww")
          :annotate (lambda (c) (get-text-property 0 'url c))
          :history 'jao-eww-consult-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
                         (let ((tl (or (plist-get eww-data :title) ""))
                               (url (or (eww-current-url) (buffer-name))))
                           (propertize (if (string-blank-p tl) url tl)
                                       'buffer b 'url url))))
                     (seq-filter #'jao-www--buffer-p (buffer-list))))))
  (jao-consult-add-buffer-source 'jao-eww-buffer-source "Web" ?e))

;;; Images
(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))))

;;; Close page and reopen
(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))

;;; Sessions
(use-package jao-eww-session
  :custom ((jao-eww-session-file "~/.emacs.d/cache/eww-session.eld")))

;;; Package
(use-package shr
  :custom ((shr-width nil)
           (shr-use-colors t)
           (shr-use-fonts nil)
           (shr-max-width 130)
           (shr-blocked-images nil)
           (shr-inhibit-images t)
           (shr-max-image-proportion 0.8)
           (shr-hr-line ?―)))

(use-package eww
  :demand t
  :custom ((eww-browse-url-new-window-is-tab nil)
           (eww-download-directory jao-sink-dir)
           (eww-header-line-format " %u")
           (eww-form-checkbox-selected-symbol "☒")
           (eww-buffer-name-length 180))

  :config
  (with-eval-after-load "org" (require 'ol-eww nil t))

  (defun jao-eww-buffer-name ()
    (when-let ((s (or (plist-get eww-data :title)
                      (plist-get eww-data :url))))
      (when (not (string-blank-p s)) (format "%s" s))))
  (setq eww-auto-rename-buffer #'jao-eww-buffer-name)

  :bind (:map eww-mode-map (("b" . eww-back-url)
                            ("B" . eww-forward-url)
                            ("d" . jao-download)
                            ("f" . link-hint-open-link)
                            ("F" . embark-on-link)
                            ("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-browse-new)
                            ("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)
                            ("\\" . eww-view-source)
                            ("C-c C-w" . jao-eww-close)
                            ("M-i" . eww-toggle-images))))

;;; Fixes for shr image rendering
(require 'shr)

(defun jao-shr--kill-nl (p)
  (save-excursion
    (goto-char p)
    (when (looking-at-p "\n") (delete-char 1))))

(defun jao-shr-tag-img (fn &rest args)
  (let ((p (point)))
    (prog1 (apply fn args)
      (when (> (point) p) (jao-shr--kill-nl p)))))

(defun jao-shr-insert (fn &rest args)
  (let ((p (when (and (not (bolp))
                      (get-text-property (1- (point)) 'image-url))
             (point))))
    (prog1 (apply fn args)
      (when (and p (> (point) p)) (jao-shr--kill-nl p)))))

(advice-add 'shr-tag-img :around #'jao-shr-tag-img)
(advice-add 'shr-insert :around #'jao-shr-insert)

;;; .
(provide 'jao-custom-eww)