Add buffer-local register commands to DocView

* lisp/doc-view.el (doc-view-register-alist): New defvar to keep
track of buffer-local register-alist.
(doc-view-page-to-register, doc-view-jump-to-register): Add new
commands to set and jump to buffer-local registers.
(register-val-insert, register-val-describe)
(register-val-jump-to): Register defmethod to save and restore
doc-view registers.
(doc-view-mode-map): Bind the new commands.
* doc/emacs/misc.texi (DocView Navigation): Document the new
commands.  (Bug#73293)
* etc/NEWS: Announce the change.

1 files changed, 10 insertions, 0 deletions

diff --git a/doc/emacs/misc.texi b/doc/emacs/misc.texi
index eb157c146e7..e19e554fb26 100644
--- a/doc/emacs/misc.texi
+++ b/doc/emacs/misc.texi
@@ -593,6 +593,16 @@ can further customize how @code{imenu} items are formatted and
 displayed using the variables @code{doc-view-imenu-format} and
 @code{doc-view-imenu-flatten}.
 
+@findex doc-view-page-to-register
+@findex doc-view-jump-to-register
+@kindex m @r{(DocView mode)}
+@kindex ' @r{(DocView mode)}
+  You can save the current page to a register with @kbd{m}
+(@code{doc-view-page-to-register}) (@pxref{Registers}).  However, these
+registers are not shared across buffers and stay local to the DocView
+buffer.  You can later jump to the register with @kbd{'}
+(@code{doc-view-jump-to-register}).
+
 @node DocView Searching
 @subsection DocView Searching