Print theme summaries in *Custom Themes* buffer.

* lisp/cus-theme.el (describe-theme-1): Use custom-theme-p.
(custom-theme-summary): New function.
(customize-themes): Use it.

* etc/themes/light-blue-theme.el:
* etc/themes/misterioso-theme.el:
* etc/themes/tango-dark-theme.el:
* etc/themes/tango-theme.el:
* etc/themes/tsdh-dark-theme.el:
* etc/themes/tsdh-light-theme.el:
* etc/themes/wheatgrass-theme.el:
* etc/themes/wombat-theme.el: Tweak summaries for better listability.

2 files changed, 57 insertions, 22 deletions

diff --git a/lisp/ChangeLog b/lisp/ChangeLog
index 7dac139c295..2cf968505af 100644
--- a/lisp/ChangeLog
+++ b/lisp/ChangeLog
@@ -1,3 +1,9 @@
+2011-06-14  Chong Yidong  <cyd@stupidchicken.com>
+
+        * cus-theme.el (describe-theme-1): Use custom-theme-p.
+        (custom-theme-summary): New function.
+        (customize-themes): Use it.
+
 2011-06-13  Glenn Morris  <rgm@gnu.org>
 
         * cus-dep.el (custom-make-dependencies): Use up command-line-args-left.
diff --git a/lisp/cus-theme.el b/lisp/cus-theme.el
index 86fb43be72a..7f926c85e56 100644
--- a/lisp/cus-theme.el
+++ b/lisp/cus-theme.el
@@ -483,25 +483,24 @@ It includes all faces in list FACES."
                                'help-theme-def fn)
       (princ "'"))
     (princ ".\n")
-    (if (not (memq theme custom-known-themes))
+    (if (custom-theme-p theme)
         (progn
-          (princ "It is not loaded.")
-          ;; Attempt to grab the theme documentation
-          (when fn
-            (with-temp-buffer
-              (insert-file-contents fn)
-              (let ((sexp (let ((read-circle nil))
-                            (condition-case nil
-                                (read (current-buffer))
-                              (end-of-file nil)))))
-                (and sexp (listp sexp)
-                     (eq (car sexp) 'deftheme)
-                     (setq doc (nth 2 sexp)))))))
-      (if (custom-theme-enabled-p theme)
-          (princ "It is loaded and enabled.")
-        (princ "It is loaded but disabled."))
-      (setq doc (get theme 'theme-documentation)))
-
+          (if (custom-theme-enabled-p theme)
+              (princ "It is loaded and enabled.")
+            (princ "It is loaded but disabled."))
+          (setq doc (get theme 'theme-documentation)))
+      (princ "It is not loaded.")
+      ;; Attempt to grab the theme documentation
+      (when fn
+        (with-temp-buffer
+          (insert-file-contents fn)
+          (let ((sexp (let ((read-circle nil))
+                        (condition-case nil
+                            (read (current-buffer))
+                          (end-of-file nil)))))
+            (and sexp (listp sexp)
+                 (eq (car sexp) 'deftheme)
+                 (setq doc (nth 2 sexp)))))))
     (princ "\n\nDocumentation:\n")
     (princ (if (stringp doc)
                doc
@@ -605,26 +604,56 @@ Theme files are named *-theme.el in `"))
   (widget-create 'checkbox
                  :value custom-theme-allow-multiple-selections
                  :action 'custom-theme-selections-toggle)
-  (widget-insert (propertize " Allow more than one theme at a time"
+  (widget-insert (propertize " Select more than one theme at a time"
                              'face '(variable-pitch (:height 0.9))))
 
   (widget-insert "\n\nAvailable Custom Themes:\n")
-  (let (widget)
+  (let ((help-echo "mouse-2: Enable this theme for this session")
+        widget)
     (dolist (theme (custom-available-themes))
       (setq widget (widget-create 'checkbox
                                   :value (custom-theme-enabled-p theme)
                                   :theme-name theme
+                                  :help-echo help-echo
                                   :action 'custom-theme-checkbox-toggle))
       (push (cons theme widget) custom--listed-themes)
       (widget-create-child-and-convert widget 'push-button
                                        :button-face-get 'ignore
                                        :mouse-face-get 'ignore
                                        :value (format " %s" theme)
-                                       :action 'widget-parent-action)
-      (widget-insert ?\n)))
+                                       :action 'widget-parent-action
+                                       :help-echo help-echo)
+      (widget-insert " -- "
+                     (propertize (custom-theme-summary theme)
+                                 'face 'shadow)
+                     ?\n)))
   (goto-char (point-min))
   (widget-setup))
 
+(defun custom-theme-summary (theme)
+  "Return the summary line of THEME."
+  (let (doc)
+    (if (custom-theme-p theme)
+        (setq doc (get theme 'theme-documentation))
+      (let ((fn (locate-file (concat (symbol-name theme) "-theme.el")
+                             (custom-theme--load-path)
+                             '("" "c"))))
+        (when fn
+          (with-temp-buffer
+            (insert-file-contents fn)
+            (let ((sexp (let ((read-circle nil))
+                          (condition-case nil
+                              (read (current-buffer))
+                            (end-of-file nil)))))
+              (and sexp (listp sexp)
+                   (eq (car sexp) 'deftheme)
+                   (setq doc (nth 2 sexp))))))))
+    (cond ((null doc)
+           "(no documentation available)")
+          ((string-match ".*" doc)
+           (match-string 0 doc))
+          (t doc))))
+
 (defun custom-theme-checkbox-toggle (widget &optional event)
   (let ((this-theme (widget-get widget :theme-name)))
     (if (widget-value widget)