Add imenu support for ODF files in doc-view

* lisp/doc-view.el (doc-view--outline): Pass the right file to
doc-view--pdf-outline.
* doc/emacs/misc.texi (DocView Navigation): Mention support for
Open Format Document (ODF) files too.
* etc/NEWS: Announce the change.  (bug#73719)

3 files changed, 16 insertions, 9 deletions

diff --git a/doc/emacs/misc.texi b/doc/emacs/misc.texi
index 83b83ea7ae9..f618dadc0d6 100644
--- a/doc/emacs/misc.texi
+++ b/doc/emacs/misc.texi
@@ -586,12 +586,15 @@ default size for DocView, customize the variable
 @vindex doc-view-djvused-program
   DocView can generate an outline menu for PDF and DjVu documents using
 the @command{mutool} and the @command{djvused} programs, respectively,
-when they are available.  This uses the @code{imenu} facility
-(@pxref{Imenu}).  You can customize how the @code{imenu} items for this
-outline are formatted and displayed using the variables
-@code{doc-view-imenu-format} and @code{doc-view-imenu-flatten}.  The
-filename of the @command{djvused} program can be customized by changing
-the @code{doc-view-djvused-program} user option.
+when they are available.  The outline for Open Document Format files as
+used by OpenOffice and LibreOffice are also generated using the
+@command{mutool} after they are converted to PDF.  This uses the
+@code{imenu} facility (@pxref{Imenu}).  You can customize how the
+@code{imenu} items for this outline are formatted and displayed using
+the variables @code{doc-view-imenu-format} and
+@code{doc-view-imenu-flatten}.  The filename of the @command{djvused}
+program can be customized by changing the
+@code{doc-view-djvused-program} user option.
 
 @cindex registers, in DocView mode
 @findex doc-view-page-to-register
diff --git a/etc/NEWS b/etc/NEWS
index e57991901c5..e14efad8199 100644
--- a/etc/NEWS
+++ b/etc/NEWS
@@ -390,10 +390,12 @@ command 'doc-view-page-to-register' (bound to 'm'), and later the stored
 page can be restored with 'doc-view-jump-to-register' (bound to ''').
 
 +++
-*** Docview can generate imenu index for DjVu files.
+*** Docview can generate imenu index for DjVu and ODF documents.
 When the 'djvused' program is available, Docview can now generate imenu
-index for DjVu files from its outline.
-The name of the 'djvused' program can be customized by changing the user
+index for DjVu files from its outline.  Index for Open Document Format
+(ODF) files as used by OpenOffice and LibreOffice are generated using
+the 'mutool' program after their initial conversion to PDF format.  The
+name of the 'djvused' program can be customized by changing the user
 option 'doc-view-djvused-program'.
 
 ** Tramp
diff --git a/lisp/doc-view.el b/lisp/doc-view.el
index 57a24418616..bbfbbdec925 100644
--- a/lisp/doc-view.el
+++ b/lisp/doc-view.el
@@ -2103,6 +2103,8 @@ If FILE-NAME is nil, use the current file instead."
            ('djvu
             (when doc-view-djvused-program
               (doc-view--djvu-outline file-name)))
+           ('odf
+            (doc-view--pdf-outline (doc-view-current-cache-doc-pdf)))
            (_
             (doc-view--pdf-outline file-name)))))
     (when outline (imenu-add-to-menubar "Outline"))