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org-w3m: handle w3m-image link information
- From: Boruch Baum <boruch_baum@xxxxxxx>
- Date: Thu, 11 Mar 2021 16:03:24 -0500
- X-ml-name: emacs-w3m
- X-mail-count: 13752
Attached is a patch that adds to function `org-w3m-copy-for-org-mode'
support for w3m-image links. Note that because function
`org-make-link-string' is used for constructing the buffer substring to
be copied, w3m's special face to distinguish an image link is not
transfered.
--
hkp://keys.gnupg.net
CA45 09B5 5351 7C11 A9D1 7286 0036 9E45 1595 8BC0
diff --git a/org-w3m.el b/org-w3m.el
index 9690c8e..9b3a092 100644
--- a/org-w3m.el
+++ b/org-w3m.el
@@ -82,25 +82,42 @@ so that it can be yanked into an Org buffer with links working correctly."
(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 style url to `return-content'.
- (setq return-content (concat return-content
- (org-make-link-string
- link-location link-title))))
+ (cond
+ ((<= (point) transform-end) ; point is inside transform bound
+ ;; get content between two links.
+ (when (> (point) temp-position)
+ (setq return-content (concat return-content
+ (buffer-substring
+ temp-position (point)))))
+ (cond
+ ((setq link-location (get-text-property (point) 'w3m-href-anchor))
+ ;; current point is a link
+ ;; (we thus also got link location at current point)
+ ;; get link title at current point.
+ (setq link-title (buffer-substring (point)
+ (org-w3m-get-anchor-end)))
+ ;; concat Org style url to `return-content'.
+ (setq return-content (concat return-content
+ (org-make-link-string
+ link-location link-title))))
+ ((setq link-location (get-text-property (point) 'w3m-image))
+ ;; current point is an image
+ ;; (we thus also got image link location at current point)
+ ;; get link title at current point.
+ (setq link-title (buffer-substring (point) (org-w3m-get-image-end)))
+ ;; concat Org style url to `return-content'.
+ (setq return-content (concat return-content
+ (org-make-link-string
+ link-location link-title))))
+ (t ; current point is neither a link nor an image
+ ;; NOTE: Should this point ever legitimately be reached?
+ ;; Let's explicitly unset some variables just to be
+ ;; safe...
+ (setq link-location nil
+ link-title nil))))
+ (t ; point is NOT inside transform bound
(goto-char temp-position) ; reset point before jump next anchor
- (setq out-bound t) ; for break out `while' loop
- ))
+ (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
@@ -113,6 +130,7 @@ so that it can be yanked into an Org buffer with links working correctly."
(defun org-w3m-get-anchor-start ()
"Move cursor to the start of current anchor. Return point."
;; get start position of anchor or current point
+ ;; NOTE: This function seems never to be used. Should it be removed?
(goto-char (or (previous-single-property-change (point) 'w3m-anchor-sequence)
(point))))
@@ -122,26 +140,46 @@ so that it can be yanked into an Org buffer with links working correctly."
(goto-char (or (next-single-property-change (point) 'w3m-anchor-sequence)
(point))))
+(defun org-w3m-get-image-end ()
+ "Move cursor to the end of current image. Return point."
+ ;; get end position of image or point
+ ;; NOTE: Function `org-w3m-get-image-start' was not created because
+ ;; function `org-w3m-get-anchor-start' is never used.
+ (goto-char (or (next-single-property-change (point) 'w3m-image)
+ (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))
+ "Move cursor to the start of next link or image. Return point."
+ (let (pos start-pos anchor-pos image-pos)
+ (setq pos (setq start-pos (point)))
+ (setq anchor-pos
+ (catch 'reach
+ (while (setq pos (next-single-property-change pos 'w3m-anchor-sequence))
+ (when (get-text-property pos 'w3m-href-anchor)
+ (throw 'reach pos)))))
+ (setq pos start-pos)
+ (setq image-pos
+ (catch 'reach
+ (while (setq pos (next-single-property-change pos 'w3m-image))
+ (when (get-text-property pos 'w3m-image)
+ (throw 'reach pos)))))
+ (goto-char (min (or anchor-pos (point-max)) (or image-pos (point-max))))))
(defun org-w3m-get-prev-link-start ()
"Move cursor to the start of previous link. Return point."
+ ;; NOTE: This function is only called by `org-w3m-no-prev-link-p',
+ ;; which itself seems never to be used. Should it be removed?
+ ;;
+ ;; WARNING: This function has not been updated to account for
+ ;; `w3m-image'. See `org-w3m-get-next-link-start'.
(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))))
+ (let ((pos (point)))
+ (while (setq pos (previous-single-property-change pos 'w3m-anchor-sequence))
+ (when (get-text-property pos 'w3m-href-anchor)
+ ;; jump to previous anchor
+ (goto-char pos)
+ ;; return point when current is valid link
+ (throw 'reach nil)))))
(point))
(defun org-w3m-no-next-link-p ()
@@ -153,6 +191,7 @@ Return t if there is no next link; otherwise, return nil."
(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."
+ ;; NOTE: This function seems never to be used. Should it be removed?
(save-excursion
(equal (point) (org-w3m-get-prev-link-start))))