;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2013, 2014 Ludovic Courtès <ludo@gnu.org>
;;; Copyright © 2016 Alex ter Weele <alex.ter.weele@gmail.com>
;;; Copyright © 2017 Ricardo Wurmus <rekado@elephly.net>
;;; Copyright © 2017 ng0 <ng0@n0.is>
;;;
;;; This file is part of GNU Guix.
;;;
;;; GNU Guix is free software; you can redistribute it and/or modify it
;;; under the terms of the GNU General Public License as published by
;;; the Free Software Foundation; either version 3 of the License, or (at
;;; your option) any later version.
;;;
;;; GNU Guix is distributed in the hope that it will be useful, but
;;; WITHOUT ANY WARRANTY; without even the implied warranty of
;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
;;; GNU General Public License for more details.
;;;
;;; You should have received a copy of the GNU General Public License
;;; along with GNU Guix.  If not, see <http://www.gnu.org/licenses/>.

(define-module (gnu packages guile-wm)
  #:use-module (guix licenses)
  #:use-module (gnu packages)
  #:use-module (gnu packages xorg)
  #:use-module (gnu packages guile)
  #:use-module (gnu packages pkg-config)
  #:use-module (gnu packages texinfo)
  #:use-module (guix packages)
  #:use-module (guix download)
  #:use-module (guix git-download)
  #:use-module (guix build-system gnu))

(define-public guile-xcb
  (let ((commit "db7d5a393cc37a56f66541b3f33938b40c6f35b3")
        (revision "1"))
  (package
    (name "guile-xcb")
    (version (git-version "1.3" revision commit))
    (source (origin
             (method git-fetch)
             (uri (git-reference
                   (url "https://github.com/mwitmer/guile-xcb")
                   (commit commit)))
             (file-name (git-file-name name version))
             (sha256
              (base32
               "16w4vgzbmnwih4bgfn8rw85ryfvzhc6hyly6bic9sd7hhc82rcnd"))))
    (build-system gnu-build-system)
    (arguments '(;; Parallel builds fail.
                 #:parallel-build? #f

                 #:configure-flags (list (string-append
                                          "--with-guile-site-dir="
                                          (assoc-ref %outputs "out")
                                          "/share/guile/site/2.0")
                                         (string-append
                                          "--with-guile-site-ccache-dir="
                                          (assoc-ref %outputs "out")
                                          "/share/guile/site/2.0"))))
    (native-inputs `(("pkg-config" ,pkg-config)
                     ("texinfo" ,texinfo)))
    (inputs `(("guile" ,guile-2.0)
              ("xcb" ,xcb-proto)))
    (home-page "https://github.com/mwitmer/guile-xcb")
    (synopsis "XCB bindings for Guile")
    (description
     "Guile-XCB implements the XCB protocol and provides all the tools
necessary to write X client code in Guile Scheme without any external
dependencies.")
    (license gpl3+))))

(define-public guile-wm
  (package
    (name "guile-wm")
    (version "1.0")
    (synopsis "X11 window manager toolkit in Scheme")
    (source (origin
              (method url-fetch)
              (uri (string-append "http://web.archive.org/web/20161005084324/"
                                  "http://www.markwitmer.com/dist/guile-wm-"
                                  version ".tar.gz"))
              (sha256
               (base32
                "1l9qcz236jxvryndimjy62cf8zxf8i3f8vg3zpqqjhw15j9mdk3r"))))
    (build-system gnu-build-system)
    (arguments
     `( ;; The '.scm' files go to $(datadir), so set that to the
       ;; standard value.
       #:configure-flags (list (string-append "--datadir="
                                              (assoc-ref %outputs "out")
                                              "/share/guile/site/2.0"))
       #:phases
       (modify-phases %standard-phases
         (add-before 'configure 'set-go-directory
          (lambda* (#:key outputs #:allow-other-keys)
            ;; Install .go files to $out/share/guile/site/2.0.
            (let ((out (assoc-ref outputs "out")))
              (substitute* "module/Makefile.in"
                (("^wmdir = .*$")
                 (string-append "wmdir = " out
                                "/share/guile/site/2.0\n"))))
            #t))
         (add-after 'install 'set-load-path
           (lambda* (#:key inputs outputs #:allow-other-keys)
             ;; Put Guile-XCB's and Guile-WM's modules in the
             ;; search path of PROG.
             (let* ((out  (assoc-ref outputs "out"))
                    (prog (string-append out "/bin/guile-wm"))
                    (mods (string-append
                           out "/share/guile/site/2.0"))
                    (xcb  (string-append
                           (assoc-ref inputs "guile-xcb")
                           "/share/guile/site/2.0")))
               (wrap-program
                   prog
                 `("GUILE_LOAD_PATH" ":" prefix (,mods ,xcb))
                 `("GUILE_LOAD_COMPILED_PATH" ":" prefix
                   (,mods ,xcb))))
             #t))
         (add-after 'install 'install-xsession
           (lambda* (#:key outputs #:allow-other-keys)
             ;; add a .desktop file to xsessions
             (let ((xsessions (string-append
                               %output "/share/xsessions")))
               (mkdir-p xsessions)
               (call-with-output-file (string-append
                                       xsessions "/guile-wm.desktop")
                 (lambda (port)
                   (format port
                          "[Desktop Entry]~@
                                    Name=~a~@
                                    Comment=~a~@
                                    Exec=~a/bin/guile-wm~@
                                    Type=Application~%"
                          ,name ,synopsis %output))))
             #t)))))
    (native-inputs `(("pkg-config" ,pkg-config)))
    (inputs `(("guile" ,guile-2.0)
              ("guile-xcb" ,guile-xcb)))
    (home-page "http://www.markwitmer.com/guile-xcb/guile-wm.html")
    (description
     "Guile-WM is a simple window manager that's completely customizable—you
have total control of what it does by choosing which modules to include.
Included with it are a few modules that provide basic TinyWM-like window
management, some window record-keeping, multi-monitor support, and emacs-like
keymaps and minibuffer.  At this point, it's just enough to get you started.")
    (license gpl3+)))