emacs: Separate package license code.

Move list/info interface code from "guix-license.el" to
"guix-ui-license.el".

* emacs/guix-license.el (guix-license-get-entries, guix-license-get-display)
(guix-license-insert-packages-button, guix-license-insert-comment)
(guix-licenses): Move to...
* emacs/guix-ui-license.el: ... here.  New file.
* emacs.am (ELFILES): Add it.

3 files changed, 120 insertions, 86 deletions

diff --git a/emacs.am b/emacs.am
index c0d294de9d..f0647d14fd 100644
--- a/emacs.am
+++ b/emacs.am
@@ -48,6 +48,7 @@ ELFILES =					\
   emacs/guix-profiles.el			\
   emacs/guix-read.el				\
   emacs/guix-ui.el				\
+  emacs/guix-ui-license.el			\
   emacs/guix-ui-package.el			\
   emacs/guix-ui-generation.el			\
   emacs/guix-ui-system-generation.el		\
diff --git a/emacs/guix-license.el b/emacs/guix-license.el
index a99d7af98d..940f5518e2 100644
--- a/emacs/guix-license.el
+++ b/emacs/guix-license.el
@@ -23,108 +23,22 @@
 
 ;;; Code:
 
-(require 'guix-buffer)
-(require 'guix-list)
-(require 'guix-info)
 (require 'guix-read)
 (require 'guix-backend)
 (require 'guix-guile)
 
-(guix-define-entry-type license)
-
 (defun guix-lookup-license-url (license)
   "Return URL of a LICENSE."
   (or (guix-eval-read (guix-make-guile-expression
                        'lookup-license-uri license))
       (error "Hm, I don't know URL of '%s' license" license)))
 
-(defun guix-license-get-entries (search-type &rest args)
-  "Receive 'license' entries.
-SEARCH-TYPE may be one of the following symbols: `all', `id', `name'."
-  (guix-eval-read
-   (apply #'guix-make-guile-expression
-          'license-entries search-type args)))
-
-(defun guix-license-get-display (search-type &rest args)
-  "Search for licenses and show results."
-  (apply #'guix-list-get-display-entries
-         'license search-type args))
-
-
-;;; License 'info'
-
-(guix-info-define-interface license
-  :buffer-name "*Guix License Info*"
-  :get-entries-function 'guix-license-get-entries
-  :format '((name ignore (simple guix-info-heading))
-            ignore
-            guix-license-insert-packages-button
-            (url ignore (simple guix-url))
-            guix-license-insert-comment)
-  :titles '((url . "URL")))
-
-(declare-function guix-packages-by-license "guix-ui-package")
-
-(defun guix-license-insert-packages-button (entry)
-  "Insert button to display packages by license ENTRY."
-  (guix-info-insert-action-button
-   "Packages"
-   (lambda (btn)
-     (guix-packages-by-license (button-get btn 'license)))
-   "Show packages with this license"
-   'license (guix-entry-value entry 'name)))
-
-(defun guix-license-insert-comment (entry)
-  "Insert 'comment' of a license ENTRY."
-  (let ((comment (guix-entry-value entry 'comment)))
-    (if (and comment
-             (string-match-p "^http" comment))
-        (guix-info-insert-value-simple comment 'guix-url)
-      (guix-info-insert-title-simple
-       (guix-info-param-title 'license 'comment))
-      (guix-info-insert-value-indent comment))))
-
-
-;;; License 'list'
-
-(guix-list-define-interface license
-  :buffer-name "*Guix Licenses*"
-  :get-entries-function 'guix-license-get-entries
-  :describe-function 'guix-license-list-describe
-  :format '((name nil 40 t)
-            (url guix-list-get-url 50 t))
-  :titles '((name . "License"))
-  :sort-key '(name))
-
-(let ((map guix-license-list-mode-map))
-  (define-key map (kbd "RET") 'guix-license-list-show-packages))
-
-(defun guix-license-list-describe (ids)
-  "Describe licenses with IDS (list of identifiers)."
-  (guix-buffer-display-entries
-   (guix-entries-by-ids ids (guix-buffer-current-entries))
-   'info 'license (cl-list* 'id ids) 'add))
-
-(defun guix-license-list-show-packages ()
-  "Display packages with the license at point."
-  (interactive)
-  (guix-packages-by-license (guix-list-current-id)))
-
-
-;;; Interactive commands
-
 ;;;###autoload
 (defun guix-browse-license-url (license)
   "Browse URL of a LICENSE."
   (interactive (list (guix-read-license-name)))
   (browse-url (guix-lookup-license-url license)))
 
-;;;###autoload
-(defun guix-licenses ()
-  "Display licenses of the Guix packages."
-  (interactive)
-  (guix-license-get-display 'all))
-
 (provide 'guix-license)
 
 ;;; guix-license.el ends here
diff --git a/emacs/guix-ui-license.el b/emacs/guix-ui-license.el
new file mode 100644
index 0000000000..c5e642f606
--- /dev/null
+++ b/emacs/guix-ui-license.el
@@ -0,0 +1,119 @@
+;;; guix-ui-license.el --- Interface for displaying licenses
+
+;; Copyright © 2016 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 'list'/'info' interface for displaying licenses of
+;; Guix packages.
+
+;;; Code:
+
+(require 'guix-buffer)
+(require 'guix-list)
+(require 'guix-info)
+(require 'guix-backend)
+(require 'guix-guile)
+
+(guix-define-entry-type license)
+
+(defun guix-license-get-entries (search-type &rest args)
+  "Receive 'license' entries.
+SEARCH-TYPE may be one of the following symbols: `all', `id', `name'."
+  (guix-eval-read
+   (apply #'guix-make-guile-expression
+          'license-entries search-type args)))
+
+(defun guix-license-get-display (search-type &rest args)
+  "Search for licenses and show results."
+  (apply #'guix-list-get-display-entries
+         'license search-type args))
+
+
+;;; License 'info'
+
+(guix-info-define-interface license
+  :buffer-name "*Guix License Info*"
+  :get-entries-function 'guix-license-get-entries
+  :format '((name ignore (simple guix-info-heading))
+            ignore
+            guix-license-insert-packages-button
+            (url ignore (simple guix-url))
+            guix-license-insert-comment)
+  :titles '((url . "URL")))
+
+(declare-function guix-packages-by-license "guix-ui-package")
+
+(defun guix-license-insert-packages-button (entry)
+  "Insert button to display packages by license ENTRY."
+  (let ((license (guix-entry-value entry 'name)))
+    (guix-info-insert-action-button
+     "Packages"
+     (lambda (btn)
+       (guix-packages-by-license (button-get btn 'license)))
+     (format "Display packages with license '%s'" license)
+     'license license)))
+
+(defun guix-license-insert-comment (entry)
+  "Insert 'comment' of a license ENTRY."
+  (let ((comment (guix-entry-value entry 'comment)))
+    (if (and comment
+             (string-match-p "^http" comment))
+        (guix-info-insert-value-simple comment 'guix-url)
+      (guix-info-insert-title-simple
+       (guix-info-param-title 'license 'comment))
+      (guix-info-insert-value-indent comment))))
+
+
+;;; License 'list'
+
+(guix-list-define-interface license
+  :buffer-name "*Guix Licenses*"
+  :get-entries-function 'guix-license-get-entries
+  :describe-function 'guix-license-list-describe
+  :format '((name nil 40 t)
+            (url guix-list-get-url 50 t))
+  :titles '((name . "License"))
+  :sort-key '(name))
+
+(let ((map guix-license-list-mode-map))
+  (define-key map (kbd "RET") 'guix-license-list-show-packages))
+
+(defun guix-license-list-describe (ids)
+  "Describe licenses with IDS (list of identifiers)."
+  (guix-buffer-display-entries
+   (guix-entries-by-ids ids (guix-buffer-current-entries))
+   'info 'license (cl-list* 'id ids) 'add))
+
+(defun guix-license-list-show-packages ()
+  "Display packages with the license at point."
+  (interactive)
+  (guix-packages-by-license (guix-list-current-id)))
+
+
+;;; Interactive commands
+
+;;;###autoload
+(defun guix-licenses ()
+  "Display licenses of the Guix packages."
+  (interactive)
+  (guix-license-get-display 'all))
+
+(provide 'guix-ui-license)
+
+;;; guix-ui-license.el ends here