Base patch for bug #5975 (bookmarking from Gnus Article buffer).

[Karl Fogel <kfogel@red-bean.com>]

I have a branch that prepares the way for setting bookmarks in Gnus
Article buffers, based on Thierry's patch in bug #5975.

I'm not sure where to apply this.  Is pushing changes to trunk is okay
right now?  Starting from [1] and [2], I didn't find any notice that we
are in feature freeze, but I'm pretty sure last time I pushed it turned
out to be a mistake and that I should not have pushed to trunk.

Independently of the above, Thierry, note I made some changes to your
patch.  You used (or kept) parameter names `point-only' and `read-only';
I changed those to `no-file' and `no-context', to describe what they are
actually doing (whether the buffer is read-only or not is irrelevant to
whether one wants the front/rear context strings in bookmark record).  I
also fixed up the doc string to mention your new POSN parameter, which I
moved to the end of the parameter list.  (Don't worry, I will adjust the
gnus-sum.el patch as needed when the time comes.)

I have not (yet) included your changes to gnus/gnus-art.el and
gnus/gnus-sum.el, which finish the new functionality.  Two reasons:

  1. You said in the bug that you fixed C-w later.  Could you provide
     that patch, please?

  2. I'm not sure whether it's okay to commit significant code changes
     under gnus/, since the master is maintained outside the Emacs tree. 
     If it is okay, then I am happy to apply your change (plus the C-w
     fix).  I did test it, and it worked, except for C-w of course.

Anyone who has comments or answers re the above, please chime in.

Just for reference, the current (preparatory) patch is below.  I will
follow up separately with the gnus/* patch, so it's in the archives.

Thanks for the patch, Thierry.  We're getting close.

-Karl

[1] http://www.gnu.org/software/emacs/
[2] http://savannah.gnu.org/projects/emacs

=== modified file 'lisp/ChangeLog'
--- lisp/ChangeLog	2010-07-13 10:41:49 +0000
+++ lisp/ChangeLog	2010-07-13 21:19:42 +0000
@@ -1,3 +1,26 @@
+2010-07-13  Karl Fogel  <kfogel@red-bean.com>
+
+	Prepare the way for setting bookmarks in Gnus article buffers.
+
+	* lisp/bookmark.el (bookmark-make-record-default): Allow unneeded
+	information to be omitted from the record.  Based on part of a
+	patch by Thierry Volpiatto (Bug#5975).
+
+	Adjust declarations and calls:
+
+	* info.el (bookmark-make-record-default): Adjust declaration.
+	(Info-bookmark-make-record): Adjust call.
+
+	* woman.el (bookmark-make-record-default): Adjust declaration.
+	(woman-bookmark-make-record): Adjust call.
+
+	* man.el (bookmark-make-record-default): Adjust declaration.
+	(Man-bookmark-make-record): Adjust call.
+
+	* image-mode.el (bookmark-make-record-default): Adjust declaration.
+
+	* doc-view.el (bookmark-make-record-default): Adjust declaration.
+
 2010-07-13  Adrian Robert  <Adrian.B.Robert@gmail.com>
 
 	* term/ns-win.el: Bind M-~ to 'ns-prev-frame (due to Matthew

=== modified file 'lisp/bookmark.el'
--- lisp/bookmark.el	2010-07-10 18:52:53 +0000
+++ lisp/bookmark.el	2010-07-13 21:19:42 +0000
@@ -528,26 +528,36 @@
     (setq bookmark-current-bookmark stripped-name)
     (bookmark-bmenu-surreptitiously-rebuild-list)))
 
-(defun bookmark-make-record-default (&optional point-only)
+(defun bookmark-make-record-default (&optional no-file no-context posn)
   "Return the record describing the location of a new bookmark.
-Must be at the correct position in the buffer in which the bookmark is
-being set.
-If POINT-ONLY is non-nil, then only return the subset of the
-record that pertains to the location within the buffer."
-  `(,@(unless point-only `((filename . ,(bookmark-buffer-file-name))))
-    (front-context-string
-     . ,(if (>= (- (point-max) (point)) bookmark-search-size)
-            (buffer-substring-no-properties
-             (point)
-             (+ (point) bookmark-search-size))
-          nil))
-    (rear-context-string
-     . ,(if (>= (- (point) (point-min)) bookmark-search-size)
-            (buffer-substring-no-properties
-             (point)
-             (- (point) bookmark-search-size))
-          nil))
-    (position . ,(point))))
+Point should be at the buffer in which the bookmark is being set,
+and normally should be at the position where the bookmark is desired,
+but see the optional arguments for other possibilities.
+
+If NO-FILE is non-nil, then only return the subset of the
+record that pertains to the location within the buffer, leaving off
+the part that records the filename.
+
+If NO-CONTEXT is non-nil, do not include the front- and rear-context
+strings in the record -- the position is enough.
+
+If POSN is non-nil, record POSN as the point instead of `(point)'."
+  `(,@(unless no-file `((filename . ,(bookmark-buffer-file-name))))
+    ,@(unless no-context `((front-context-string
+                           . ,(if (>= (- (point-max) (point))
+                                      bookmark-search-size)
+                                  (buffer-substring-no-properties
+                                   (point)
+                                   (+ (point) bookmark-search-size))
+                                  nil))))
+    ,@(unless no-context `((rear-context-string
+                           . ,(if (>= (- (point) (point-min))
+                                      bookmark-search-size)
+                                  (buffer-substring-no-properties
+                                   (point)
+                                   (- (point) bookmark-search-size))
+                                  nil))))
+    (position . ,(or posn (point)))))
 
 \f
 ;;; File format stuff

=== modified file 'lisp/doc-view.el'
--- lisp/doc-view.el	2010-02-16 14:35:45 +0000
+++ lisp/doc-view.el	2010-07-13 21:19:42 +0000
@@ -1349,8 +1349,8 @@
 
 ;;;; Bookmark integration
 
-(declare-function bookmark-make-record-default "bookmark"
-                  (&optional point-only))
+(declare-function bookmark-make-record-default
+                  "bookmark" (&optional no-file no-context posn))
 (declare-function bookmark-prop-get "bookmark" (bookmark prop))
 (declare-function bookmark-default-handler "bookmark" (bmk))
 

=== modified file 'lisp/gnus/ChangeLog'
--- lisp/gnus/ChangeLog	2010-06-22 16:48:53 +0000
+++ lisp/gnus/ChangeLog	2010-07-13 21:19:42 +0000
@@ -1,3 +1,8 @@
+2010-07-13  Karl Fogel  <kfogel@red-bean.com>
+
+	* gnus/gnus-sum.el (bookmark-make-record-default): Adjust
+	declaration, based on changes in bookmark.el.
+
 2010-06-22  Mark A. Hershberger  <mah@everybody.org>
 
 	* mm-url.el (mm-url-encode-multipart-form-data): New function to handle

=== modified file 'lisp/gnus/gnus-sum.el'
--- lisp/gnus/gnus-sum.el	2010-06-10 00:30:13 +0000
+++ lisp/gnus/gnus-sum.el	2010-07-13 21:19:42 +0000
@@ -12621,7 +12621,8 @@
     (gnus-summary-position-point)))
 
 ;;; Bookmark support for Gnus.
-(declare-function bookmark-make-record-default "bookmark" (&optional pos-only))
+(declare-function bookmark-make-record-default
+                  "bookmark" (&optional no-file no-context posn))
 (declare-function bookmark-prop-get "bookmark" (bookmark prop))
 (declare-function bookmark-default-handler "bookmark" (bmk))
 (declare-function bookmark-get-bookmark-record "bookmark" (bmk))

=== modified file 'lisp/image-mode.el'
--- lisp/image-mode.el	2010-06-14 03:19:46 +0000
+++ lisp/image-mode.el	2010-07-13 21:19:42 +0000
@@ -516,8 +516,8 @@
 
 \f
 ;;; Support for bookmark.el
-(declare-function bookmark-make-record-default "bookmark"
-                  (&optional point-only))
+(declare-function bookmark-make-record-default
+                  "bookmark" (&optional no-file no-context posn))
 (declare-function bookmark-prop-get "bookmark" (bookmark prop))
 (declare-function bookmark-default-handler "bookmark" (bmk))
 

=== modified file 'lisp/info.el'
--- lisp/info.el	2010-06-17 20:56:17 +0000
+++ lisp/info.el	2010-07-13 21:19:42 +0000
@@ -4901,7 +4901,8 @@
 	     '(Info-mode . Info-restore-desktop-buffer))
 
 ;;;; Bookmark support
-(declare-function bookmark-make-record-default "bookmark" (&optional pos-only))
+(declare-function bookmark-make-record-default
+                  "bookmark" (&optional no-file no-context posn))
 (declare-function bookmark-prop-get "bookmark" (bookmark prop))
 (declare-function bookmark-default-handler "bookmark" (bmk))
 (declare-function bookmark-get-bookmark-record "bookmark" (bmk))
@@ -4910,7 +4911,7 @@
   "This implements the `bookmark-make-record-function' type (which see)
 for Info nodes."
   `(,Info-current-node
-    ,@(bookmark-make-record-default 'point-only)
+    ,@(bookmark-make-record-default 'no-file)
     (filename . ,Info-current-file)
     (info-node . ,Info-current-node)
     (handler . Info-bookmark-jump)))

=== modified file 'lisp/man.el'
--- lisp/man.el	2010-06-01 02:34:49 +0000
+++ lisp/man.el	2010-07-13 21:19:42 +0000
@@ -1674,7 +1674,8 @@
     complete-path))
 
 ;;; Bookmark Man Support
-(declare-function bookmark-make-record-default "bookmark" (&optional pos-only))
+(declare-function bookmark-make-record-default
+                  "bookmark" (&optional no-file no-context posn))
 (declare-function bookmark-prop-get "bookmark" (bookmark prop))
 (declare-function bookmark-default-handler "bookmark" (bmk))
 (declare-function bookmark-get-bookmark-record "bookmark" (bmk))
@@ -1691,7 +1692,7 @@
 (defun Man-bookmark-make-record ()
   "Make a bookmark entry for a Man buffer."
   `(,(Man-default-bookmark-title)
-    ,@(bookmark-make-record-default 'point-only)
+    ,@(bookmark-make-record-default 'no-file)
     (location . ,(concat "man " Man-arguments))
     (man-args . ,Man-arguments)
     (handler . Man-bookmark-jump)))

=== modified file 'lisp/woman.el'
--- lisp/woman.el	2010-05-25 02:11:08 +0000
+++ lisp/woman.el	2010-07-13 21:19:42 +0000
@@ -4521,7 +4521,8 @@
   nil)					; for woman-file-readable-p etc.
 
 ;;; Bookmark Woman support.
-(declare-function bookmark-make-record-default "bookmark" (&optional pos-only))
+(declare-function bookmark-make-record-default
+                  "bookmark" (&optional no-file no-context posn))
 (declare-function bookmark-prop-get "bookmark" (bookmark prop))
 (declare-function bookmark-default-handler "bookmark" (bmk))
 (declare-function bookmark-get-bookmark-record "bookmark" (bmk))
@@ -4532,7 +4533,7 @@
 (defun woman-bookmark-make-record ()
   "Make a bookmark entry for a Woman buffer."
   `(,(Man-default-bookmark-title)
-    ,@(bookmark-make-record-default 'point-only)
+    ,@(bookmark-make-record-default 'no-file)
     (location . ,(concat "woman " woman-last-file-name))
     ;; Use the same form as man's bookmarks, as much as possible.
     (man-args . ,woman-last-file-name)