From 1d23886c121f92862b36be0a3dee6070397f2f02 Mon Sep 17 00:00:00 2001
From: Kovid Goyal <kovid@kovidgoyal.net>
Date: Tue, 15 Nov 2011 09:59:22 +0530
Subject: [PATCH] Book jacket generation: Add ability to customize the book
 jacket template and add custom columns into the jacket. Fixes #889912
 ([Enhancement] Add metadata from custom columns to jacket)

---
 resources/jacket/template.xhtml             | 8 ++++++++
 src/calibre/ebooks/oeb/transforms/jacket.py | 8 ++++++++
 2 files changed, 16 insertions(+)

diff --git a/resources/jacket/template.xhtml b/resources/jacket/template.xhtml
index 056ac0aad3..f76a126309 100644
--- a/resources/jacket/template.xhtml
+++ b/resources/jacket/template.xhtml
@@ -36,6 +36,14 @@
             <div class="cbj_footer">{footer}</div>
         </div>
         <hr class="cbj_kindle_banner_hr" />
+        <!-- 
+        In addition you can add code to show the values of custom columns here.
+        The value is available as _column_name and the title as _column_name_label.
+        For example, if you have a custom column with label #genre, you can add it to
+        this template with:
+        <div>{_genre_label}: {_genre}</div>
+        -->
+
         <div class="cbj_comments">{comments}</div>
     </body>
 </html>
diff --git a/src/calibre/ebooks/oeb/transforms/jacket.py b/src/calibre/ebooks/oeb/transforms/jacket.py
index d3b66d1e81..987fe0ce86 100644
--- a/src/calibre/ebooks/oeb/transforms/jacket.py
+++ b/src/calibre/ebooks/oeb/transforms/jacket.py
@@ -171,6 +171,14 @@ def render_jacket(mi, output_profile,
                     comments=comments,
                     footer=''
                     )
+        for key in mi.custom_field_keys():
+            try:
+                display_name, val = mi.format_field_extended(key)[:2]
+                key = key.replace('#', '_')
+                args[key] = val
+                args[key+'_label'] = display_name
+            except:
+                pass
 
         generated_html = P('jacket/template.xhtml',
                 data=True).decode('utf-8').format(**args)