+(define-markup-command (page-link layout props page-number arg)
+ (number? markup?)
+ #:category other
+ "
+@cindex referencing page numbers in text
+
+Add a link to the page @var{page-number} around @var{arg}. This only works in
+the PDF backend.
+
+@lilypond[verbatim,quote]
+\\markup {
+ \\page-link #2 { \\italic { This links to page 2... } }
+}
+@end lilypond"
+ (let* ((stil (interpret-markup layout props arg))
+ (xextent (ly:stencil-extent stil X))
+ (yextent (ly:stencil-extent stil Y))
+ (old-expr (ly:stencil-expr stil))
+ (link-expr (list 'page-link page-number `(quote ,xextent) `(quote ,yextent))))
+
+ (ly:stencil-add (ly:make-stencil link-expr xextent yextent) stil)))
+
+(define-markup-command (with-link layout props label arg)
+ (symbol? markup?)
+ #:category other
+ "
+@cindex referencing page labels in text
+
+Add a link to the page holding label @var{label} around @var{arg}. This
+only works in the PDF backend.
+
+@lilypond[verbatim,quote]
+\\markup {
+ \\with-link #\"label\" { \\italic { This links to the page containing the label... } }
+}
+@end lilypond"
+ (let* ((arg-stencil (interpret-markup layout props arg))
+ (x-ext (ly:stencil-extent arg-stencil X))
+ (y-ext (ly:stencil-extent arg-stencil Y)))
+ (ly:make-stencil
+ `(delay-stencil-evaluation
+ ,(delay (ly:stencil-expr
+ (let* ((table (ly:output-def-lookup layout 'label-page-table))
+ (page-number (if (list? table)
+ (assoc-get label table)
+ #f))
+ (link-expr (list 'page-link page-number
+ `(quote ,x-ext) `(quote ,y-ext))))
+ (ly:stencil-add (ly:make-stencil link-expr x-ext y-ext)
+arg-stencil)))))
+ x-ext
+ y-ext)))
+
+