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+;;; org-w3m.el --- Support from copy and paste from w3m to Org-mode
+
+;; Copyright (C) 2008 Free Software Foundation, Inc.
+
+;; Author: Andy Stewart <lazycat dot manatee at gmail dot com>
+;; Keywords: outlines, hypermedia, calendar, wp
+;; Homepage: http://orgmode.org
+;; Version: 6.14
+;;
+;; This file is part of GNU Emacs.
+;;
+;; GNU Emacs 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.
+
+;; GNU Emacs 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
+;; transfomring 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 ben washed with w3m.
+
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+;;
+;;; Acknowledgments:
+
+;; Richard Riley <rileyrgdev at googlemail dot com>
+;;
+;;      The idea that transfomring the HTML content with org-mode style is
+;;      proposed by Richard, i'm just code it.
+;;
+
+(require 'org)
+(declare-function w3m-anchor "ext:w3m-util" (position))
+
+(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 transform-end
+        return-content
+        link-location link-title
+        temp-position out-bound)
+    (setq transform-start (if regionp (region-beginning) (point-min))
+          transform-end (if regionp (region-end) (point-max)))
+    (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 (w3m-anchor (point)) (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 (w3m-anchor (point)))
+              ;; 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 en end of the region to be copied
+      (if (< (point) transform-end)
+          (setq return-content
+                (concat return-content
+                        (buffer-substring (point) transform-end))))
+      (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 to and return `point' for the start of the current anchor."
+  ;; 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 and return `point' after the end of current anchor."
+  ;; 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 and return `point' for that start of the current link."
+  (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 (w3m-anchor (point))
+        ;; return point when current is valid link
+        (throw 'reach nil))))
+  (point))
+
+(defun org-w3m-get-prev-link-start ()
+  "Move and return `point' for that end of the current link."
+  (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 (w3m-anchor (point))
+        ;; return point when current is valid link
+        (throw 'reach nil))))
+  (point))
+
+(defun org-w3m-no-next-link-p ()
+  "Return t if no next link after cursor.
+Otherwise, return nil."
+  (save-excursion
+    (equal (point) (org-w3m-get-next-link-start))))
+
+(defun org-w3m-no-prev-link-p ()
+  "Return t if no prevoius link after cursor.
+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)
+
+;; arch-tag: 851d7447-488d-49f0-a14d-46c092e84352
+
+;;; org-w3m.el ends here