gnu: Add goocanvas.

* gnu/packages/gtk.scm (goocanvas): New variable.

gnu/packages/gtk.scm

@@ -23,6 +23,7 @@
 ;;; Copyright © 2019 Meiyo Peng <meiyo@riseup.net>
 ;;; Copyright © 2019 Giacomo Leidi <goodoldpaul@autistici.org>
 ;;; Copyright © 2020 Brendan Tildesley <mail@brendan.scot>
+;;; Copyright © 2020 Guillaume Le Vaillant <glv@posteo.net>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -1920,3 +1921,49 @@ (define-public gtk-layer-shell
 entire output.  It supports all Layer Shell features including popups and
 popovers.")
     (license license:expat)))
+
+(define-public goocanvas
+  (package
+    (name "goocanvas")
+    (version "2.0.4")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (string-append "mirror://gnome/sources/goocanvas/"
+                           (version-major+minor version)
+                           "/goocanvas-" version ".tar.xz"))
+       (sha256
+        (base32 "141fm7mbqib0011zmkv3g8vxcjwa7hypmq71ahdyhnj2sjvy4a67"))))
+    (build-system gnu-build-system)
+    (native-inputs
+     `(("gettext" ,gettext-minimal)
+       ("glib-bin" ,glib "bin")
+       ("gobject-introspection" ,gobject-introspection)
+       ("gtk-doc" ,gtk-doc)
+       ("pkg-config" ,pkg-config)
+       ("python" ,python)))
+    (inputs
+     `(("cairo" ,cairo)
+       ("glib" ,glib)
+       ("gtk+" ,gtk+)
+       ("python-pygobject" ,python-pygobject)))
+    (arguments
+     `(#:configure-flags '("--disable-rebuilds"
+                           "--disable-static")
+       #:phases
+       (modify-phases %standard-phases
+         (add-after 'unpack 'fix-install-path
+           (lambda* (#:key inputs outputs #:allow-other-keys)
+             (substitute* "configure"
+               (("\\(gi._overridesdir\\)")
+                (string-append "((gi._overridesdir).replace(\\\""
+                               (assoc-ref inputs "python-pygobject")
+                               "\\\", \\\""
+                               (assoc-ref outputs "out")
+                               "\\\"))")))
+             #t)))))
+    (synopsis "Canvas widget for GTK+")
+    (description "GooCanvas is a canvas widget for GTK+ that uses the cairo 2D
+library for drawing.")
+    (home-page "https://wiki.gnome.org/GooCanvas")
+    (license license:lgpl2.0)))