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;;; org-w3m.el --- Support from copy and paste from w3m to Org-mode
;; Copyright (C) 2008-2017 Free Software Foundation, Inc.
;; Author: Andy Stewart <lazycat dot manatee at gmail dot com>
;; Keywords: outlines, hypermedia, calendar, wp
;; Homepage: http://orgmode.org
;;
;; This file is part of GNU Emacs.
;;
;; This program is free software: you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation, either version 3 of the License, or
;; (at your option) any later version.
;; This program is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;; GNU General Public License for more details.
;; You should have received a copy of the GNU General Public License
;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;
;;; Commentary:
;; This file implements copying HTML content from a w3m buffer and
;; transforming the text on the fly so that it can be pasted into
;; an org-mode buffer with hot links. It will also work for regions
;; in gnus buffers that have been washed with w3m.
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;
;;; Acknowledgments:
;; Richard Riley <rileyrgdev at googlemail dot com>
;;
;; The idea of transforming the HTML content with org-mode style is
;; proposed by Richard, I'm just coding it.
;;
;;; Code:
(require 'org)
(defvar w3m-current-url)
(defvar w3m-current-title)
(add-hook 'org-store-link-functions 'org-w3m-store-link)
(defun org-w3m-store-link ()
"Store a link to a w3m buffer."
(when (eq major-mode 'w3m-mode)
(org-store-link-props
:type "w3m"
:link w3m-current-url
:url (url-view-url t)
:description (or w3m-current-title w3m-current-url))))
(defun org-w3m-copy-for-org-mode ()
"Copy current buffer content or active region with `org-mode' style links.
This will encode `link-title' and `link-location' with
`org-make-link-string', and insert the transformed test into the kill ring,
so that it can be yanked into an Org-mode buffer with links working correctly."
(interactive)
(let* ((regionp (org-region-active-p))
(transform-start (point-min))
(transform-end (point-max))
return-content
link-location link-title
temp-position out-bound)
(when regionp
(setq transform-start (region-beginning))
(setq transform-end (region-end))
;; Deactivate mark if current mark is activate.
(if (fboundp 'deactivate-mark) (deactivate-mark)))
(message "Transforming links...")
(save-excursion
(goto-char transform-start)
(while (and (not out-bound) ; still inside region to copy
(not (org-w3m-no-next-link-p))) ; no next link current buffer
;; store current point before jump next anchor
(setq temp-position (point))
;; move to next anchor when current point is not at anchor
(or (get-text-property (point) 'w3m-href-anchor) (org-w3m-get-next-link-start))
(if (<= (point) transform-end) ; if point is inside transform bound
(progn
;; get content between two links.
(if (> (point) temp-position)
(setq return-content (concat return-content
(buffer-substring
temp-position (point)))))
;; get link location at current point.
(setq link-location (get-text-property (point) 'w3m-href-anchor))
;; get link title at current point.
(setq link-title (buffer-substring (point)
(org-w3m-get-anchor-end)))
;; concat `org-mode' style url to `return-content'.
(setq return-content (concat return-content
(org-make-link-string
link-location link-title))))
(goto-char temp-position) ; reset point before jump next anchor
(setq out-bound t) ; for break out `while' loop
))
;; add the rest until end of the region to be copied
(if (< (point) transform-end)
(setq return-content
(concat return-content
(buffer-substring (point) transform-end))))
(org-kill-new return-content)
(message "Transforming links...done, use C-y to insert text into Org-mode file")
(message "Copy with link transformation complete."))))
(defun org-w3m-get-anchor-start ()
"Move cursor to the start of current anchor. Return point."
;; get start position of anchor or current point
(goto-char (or (previous-single-property-change (point) 'w3m-anchor-sequence)
(point))))
(defun org-w3m-get-anchor-end ()
"Move cursor to the end of current anchor. Return point."
;; get end position of anchor or point
(goto-char (or (next-single-property-change (point) 'w3m-anchor-sequence)
(point))))
(defun org-w3m-get-next-link-start ()
"Move cursor to the start of next link. Return point."
(catch 'reach
(while (next-single-property-change (point) 'w3m-anchor-sequence)
;; jump to next anchor
(goto-char (next-single-property-change (point) 'w3m-anchor-sequence))
(when (get-text-property (point) 'w3m-href-anchor)
;; return point when current is valid link
(throw 'reach nil))))
(point))
(defun org-w3m-get-prev-link-start ()
"Move cursor to the start of previous link. Return point."
(catch 'reach
(while (previous-single-property-change (point) 'w3m-anchor-sequence)
;; jump to previous anchor
(goto-char (previous-single-property-change (point) 'w3m-anchor-sequence))
(when (get-text-property (point) 'w3m-href-anchor)
;; return point when current is valid link
(throw 'reach nil))))
(point))
(defun org-w3m-no-next-link-p ()
"Whether there is no next link after the cursor.
Return t if there is no next link; otherwise, return nil."
(save-excursion
(equal (point) (org-w3m-get-next-link-start))))
(defun org-w3m-no-prev-link-p ()
"Whether there is no previous link after the cursor.
Return t if there is no previous link; otherwise, return nil."
(save-excursion
(equal (point) (org-w3m-get-prev-link-start))))
;; Install keys into the w3m keymap
(defvar w3m-mode-map)
(defvar w3m-minor-mode-map)
(when (and (boundp 'w3m-mode-map)
(keymapp w3m-mode-map))
(define-key w3m-mode-map "\C-c\C-x\M-w" 'org-w3m-copy-for-org-mode)
(define-key w3m-mode-map "\C-c\C-x\C-w" 'org-w3m-copy-for-org-mode))
(when (and (boundp 'w3m-minor-mode-map)
(keymapp w3m-minor-mode-map))
(define-key w3m-minor-mode-map "\C-c\C-x\M-w" 'org-w3m-copy-for-org-mode)
(define-key w3m-minor-mode-map "\C-c\C-x\C-w" 'org-w3m-copy-for-org-mode))
(add-hook
'w3m-mode-hook
(lambda ()
(define-key w3m-mode-map "\C-c\C-x\M-w" 'org-w3m-copy-for-org-mode)
(define-key w3m-mode-map "\C-c\C-x\C-w" 'org-w3m-copy-for-org-mode)))
(add-hook
'w3m-minor-mode-hook
(lambda ()
(define-key w3m-minor-mode-map "\C-c\C-x\M-w" 'org-w3m-copy-for-org-mode)
(define-key w3m-minor-mode-map "\C-c\C-x\C-w" 'org-w3m-copy-for-org-mode)))
(provide 'org-w3m)
;;; org-w3m.el ends here
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