lisp/org-w3m.el

   1 ;;; org-w3m.el --- Support from Copy and Paste From w3m -*- lexical-binding: t; -*-
   2
   3 ;; Copyright (C) 2008-2016 Free Software Foundation, Inc.
   4
   5 ;; Author: Andy Stewart <lazycat dot manatee at gmail dot com>
   6 ;; Keywords: outlines, hypermedia, calendar, wp
   7 ;; Homepage: http://orgmode.org
   8 ;;
   9 ;; This file is part of GNU Emacs.
  10 ;;
  11 ;; This program is free software: you can redistribute it and/or modify
  12 ;; it under the terms of the GNU General Public License as published by
  13 ;; the Free Software Foundation, either version 3 of the License, or
  14 ;; (at your option) any later version.
  15
  16 ;; This program is distributed in the hope that it will be useful,
  17 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  18 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19 ;; GNU General Public License for more details.
  20
  21 ;; You should have received a copy of the GNU General Public License
  22 ;; along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.
  23 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
  24 ;;
  25 ;;; Commentary:
  26
  27 ;; This file implements copying HTML content from a w3m buffer and
  28 ;; transforming the text on the fly so that it can be pasted into an
  29 ;; Org buffer with hot links.  It will also work for regions in gnus
  30 ;; buffers that have been washed with w3m.
  31
  32 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
  33 ;;
  34 ;;; Acknowledgments:
  35
  36 ;; Richard Riley <rileyrgdev at googlemail dot com>
  37 ;;
  38 ;;      The idea of transforming the HTML content with Org syntax is
  39 ;;      proposed by Richard, I'm just coding it.
  40 ;;
  41
  42 ;;; Code:
  43
  44 (require 'org)
  45
  46 (defvar w3m-current-url)
  47 (defvar w3m-current-title)
  48
  49 (org-link-set-parameters "w3m" :store #'org-w3m-store-link)
  50 (defun org-w3m-store-link ()
  51   "Store a link to a w3m buffer."
  52   (when (eq major-mode 'w3m-mode)
  53     (org-store-link-props
  54      :type "w3m"
  55      :link w3m-current-url
  56      :url (url-view-url t)
  57      :description (or w3m-current-title w3m-current-url))))
  58
  59 (defun org-w3m-copy-for-org-mode ()
  60   "Copy current buffer content or active region with `org-mode' style links.
  61 This will encode `link-title' and `link-location' with
  62 `org-make-link-string', and insert the transformed test into the kill ring,
  63 so that it can be yanked into an Org  buffer with links working correctly."
  64   (interactive)
  65   (let* ((regionp (org-region-active-p))
  66          (transform-start (point-min))
  67          (transform-end (point-max))
  68          return-content
  69          link-location link-title
  70          temp-position out-bound)
  71     (when regionp
  72       (setq transform-start (region-beginning))
  73       (setq transform-end (region-end))
  74       ;; Deactivate mark if current mark is activate.
  75       (if (fboundp 'deactivate-mark) (deactivate-mark)))
  76     (message "Transforming links...")
  77     (save-excursion
  78       (goto-char transform-start)
  79       (while (and (not out-bound)                 ; still inside region to copy
  80                   (not (org-w3m-no-next-link-p))) ; no next link current buffer
  81         ;; store current point before jump next anchor
  82         (setq temp-position (point))
  83         ;; move to next anchor when current point is not at anchor
  84         (or (get-text-property (point) 'w3m-href-anchor) (org-w3m-get-next-link-start))
  85         (if (<= (point) transform-end)  ; if point is inside transform bound
  86             (progn
  87               ;; get content between two links.
  88               (if (> (point) temp-position)
  89                   (setq return-content (concat return-content
  90                                                (buffer-substring
  91                                                 temp-position (point)))))
  92               ;; get link location at current point.
  93               (setq link-location (get-text-property (point) 'w3m-href-anchor))
  94               ;; get link title at current point.
  95               (setq link-title (buffer-substring (point)
  96                                                  (org-w3m-get-anchor-end)))
  97               ;; concat `org-mode' style url to `return-content'.
  98               (setq return-content (concat return-content
  99                                            (org-make-link-string
 100                                             link-location link-title))))
 101           (goto-char temp-position)     ; reset point before jump next anchor
 102           (setq out-bound t)            ; for break out `while' loop
 103           ))
 104       ;; add the rest until end of the region to be copied
 105       (if (< (point) transform-end)
 106           (setq return-content
 107                 (concat return-content
 108                         (buffer-substring (point) transform-end))))
 109       (org-kill-new return-content)
 110       (message "Transforming links...done, use C-y to insert text into Org file")
 111       (message "Copy with link transformation complete."))))
 112
 113 (defun org-w3m-get-anchor-start ()
 114   "Move cursor to the start of current anchor.  Return point."
 115   ;; get start position of anchor or current point
 116   (goto-char (or (previous-single-property-change (point) 'w3m-anchor-sequence)
 117                  (point))))
 118
 119 (defun org-w3m-get-anchor-end ()
 120   "Move cursor to the end of current anchor.  Return point."
 121   ;; get end position of anchor or point
 122   (goto-char (or (next-single-property-change (point) 'w3m-anchor-sequence)
 123                  (point))))
 124
 125 (defun org-w3m-get-next-link-start ()
 126   "Move cursor to the start of next link.  Return point."
 127   (catch 'reach
 128     (while (next-single-property-change (point) 'w3m-anchor-sequence)
 129       ;; jump to next anchor
 130       (goto-char (next-single-property-change (point) 'w3m-anchor-sequence))
 131       (when (get-text-property (point) 'w3m-href-anchor)
 132         ;; return point when current is valid link
 133         (throw 'reach nil))))
 134   (point))
 135
 136 (defun org-w3m-get-prev-link-start ()
 137   "Move cursor to the start of previous link.  Return point."
 138   (catch 'reach
 139     (while (previous-single-property-change (point) 'w3m-anchor-sequence)
 140       ;; jump to previous anchor
 141       (goto-char (previous-single-property-change (point) 'w3m-anchor-sequence))
 142       (when (get-text-property (point) 'w3m-href-anchor)
 143         ;; return point when current is valid link
 144         (throw 'reach nil))))
 145   (point))
 146
 147 (defun org-w3m-no-next-link-p ()
 148   "Whether there is no next link after the cursor.
 149 Return t if there is no next link; otherwise, return nil."
 150   (save-excursion
 151     (equal (point) (org-w3m-get-next-link-start))))
 152
 153 (defun org-w3m-no-prev-link-p ()
 154   "Whether there is no previous link after the cursor.
 155 Return t if there is no previous link; otherwise, return nil."
 156   (save-excursion
 157     (equal (point) (org-w3m-get-prev-link-start))))
 158
 159 ;; Install keys into the w3m keymap
 160 (defvar w3m-mode-map)
 161 (defvar w3m-minor-mode-map)
 162 (when (and (boundp 'w3m-mode-map)
 163            (keymapp w3m-mode-map))
 164   (define-key w3m-mode-map "\C-c\C-x\M-w" 'org-w3m-copy-for-org-mode)
 165   (define-key w3m-mode-map "\C-c\C-x\C-w" 'org-w3m-copy-for-org-mode))
 166 (when (and (boundp 'w3m-minor-mode-map)
 167            (keymapp w3m-minor-mode-map))
 168   (define-key w3m-minor-mode-map "\C-c\C-x\M-w" 'org-w3m-copy-for-org-mode)
 169   (define-key w3m-minor-mode-map "\C-c\C-x\C-w" 'org-w3m-copy-for-org-mode))
 170 (add-hook
 171  'w3m-mode-hook
 172  (lambda ()
 173    (define-key w3m-mode-map "\C-c\C-x\M-w" 'org-w3m-copy-for-org-mode)
 174    (define-key w3m-mode-map "\C-c\C-x\C-w" 'org-w3m-copy-for-org-mode)))
 175 (add-hook
 176  'w3m-minor-mode-hook
 177  (lambda ()
 178    (define-key w3m-minor-mode-map "\C-c\C-x\M-w" 'org-w3m-copy-for-org-mode)
 179    (define-key w3m-minor-mode-map "\C-c\C-x\C-w" 'org-w3m-copy-for-org-mode)))
 180
 181 (provide 'org-w3m)
 182
 183 ;;; org-w3m.el ends here