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+;;; guix-ui.el --- Common code for Guix package management interface -*- lexical-binding: t -*-
+
+;; Copyright © 2014, 2015 Alex Kost <alezost@gmail.com>
+
+;; 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 this program. If not, see <http://www.gnu.org/licenses/>.
+
+;;; Commentary:
+
+;; This file provides some general code for 'list'/'info' interfaces for
+;; packages and generations.
+
+;;; Code:
+
+(require 'cl-lib)
+(require 'guix-utils)
+
+(defun guix-ui-list-describe (ids)
+ "Describe 'ui' entries with IDS (list of identifiers)."
+ (apply #'guix-get-show-entries
+ guix-profile 'info guix-entry-type 'id ids))
+
+
+;;; Interface definers
+
+(defmacro guix-ui-define-interface (buffer-type entry-type &rest args)
+ "Define BUFFER-TYPE interface for displaying ENTRY-TYPE entries.
+Remaining arguments (ARGS) should have a form [KEYWORD VALUE] ...
+In the following description TYPE means ENTRY-TYPE-BUFFER-TYPE.
+
+Optional keywords:
+
+ - `:required' - default value of the generated
+ `guix-TYPE-required-params' variable.
+
+The rest keyword arguments are passed to
+`guix-BUFFER-TYPE-define-interface' macro."
+ (declare (indent 2))
+ (let* ((entry-type-str (symbol-name entry-type))
+ (buffer-type-str (symbol-name buffer-type))
+ (prefix (concat "guix-" entry-type-str "-"
+ buffer-type-str))
+ (required-var (intern (concat prefix "-required-params")))
+ (definer (intern (format "guix-%s-define-interface"
+ buffer-type-str))))
+ (guix-keyword-args-let args
+ ((required-val :required ''(id)))
+ `(progn
+ (defvar ,required-var ,required-val
+ ,(format "\
+List of the required '%s' parameters for '%s' buffer.
+These parameters are received along with the displayed parameters."
+ entry-type-str buffer-type-str))
+
+ (,definer ,entry-type
+ ,@%foreign-args)))))
+
+(defmacro guix-ui-info-define-interface (entry-type &rest args)
+ "Define 'info' interface for displaying ENTRY-TYPE entries.
+See `guix-ui-define-interface'."
+ (declare (indent 1))
+ `(guix-ui-define-interface info ,entry-type
+ ,@args))
+
+(defmacro guix-ui-list-define-interface (entry-type &rest args)
+ "Define 'list' interface for displaying ENTRY-TYPE entries.
+Remaining arguments (ARGS) should have a form [KEYWORD VALUE] ...
+
+Optional keywords:
+
+ - `:describe-function' - default value of the generated
+ `guix-ENTRY-TYPE-list-describe-function' variable (if not
+ specified, use `guix-ui-list-describe').
+
+The rest keyword arguments are passed to
+`guix-ui-define-interface' macro."
+ (declare (indent 1))
+ (guix-keyword-args-let args
+ ((describe-val :describe-function))
+ `(guix-ui-define-interface list ,entry-type
+ :describe-function ,(or describe-val ''guix-ui-list-describe)
+ ,@args)))
+
+
+(defvar guix-ui-font-lock-keywords
+ (eval-when-compile
+ `((,(rx "(" (group (or "guix-ui-define-interface"
+ "guix-ui-info-define-interface"
+ "guix-ui-list-define-interface"))
+ symbol-end)
+ . 1))))
+
+(font-lock-add-keywords 'emacs-lisp-mode guix-ui-font-lock-keywords)
+
+(provide 'guix-ui)
+
+;;; guix-ui.el ends here