Book details panel: Display data in right-to-left format when the calibre interface language is set to a right-to-left language such as Hebrew or Arabic

src/calibre/ebooks/metadata/book/render.py

@@ -53,7 +53,7 @@ def search_href(search_term, value):
 def item_data(field_name, value, book_id):
     return hexlify(cPickle.dumps((field_name, value, book_id), -1))
 
-def mi_to_html(mi, field_list=None, default_author_link=None, use_roman_numbers=True, rating_font='Liberation Serif'):
+def mi_to_html(mi, field_list=None, default_author_link=None, use_roman_numbers=True, rating_font='Liberation Serif', rtl=False):
     if field_list is None:
         field_list = get_field_list(mi)
     ans = []
@@ -263,4 +263,5 @@ def mi_to_html(mi, field_list=None, default_author_link=None, use_roman_numbers=
     ans = [u'<tr id="%s" class="%s">%s</tr>'%(fieldl.replace('#', '_'),
         classname(fieldl), html) for fieldl, html in ans]
     # print '\n'.join(ans)
-    return u'<table class="fields">%s</table>'%(u'\n'.join(ans)), comment_fields
+    direction = 'rtl' if rtl else 'ltr'
+    return u'<table class="fields" dir="%s">%s</table>'%(direction, u'\n'.join(ans)), comment_fields

src/calibre/gui2/book_details.py

@@ -23,6 +23,7 @@ from calibre.ebooks.metadata.book.base import (field_metadata, Metadata)
 from calibre.ebooks.metadata.book.render import mi_to_html
 from calibre.gui2 import (config, open_url, pixmap_to_data, gprefs, rating_font)
 from calibre.utils.config import tweaks
+from calibre.utils.localization import is_rtl
 
 def render_html(mi, css, vertical, widget, all_fields=False, render_data_func=None):  # {{{
     table, comment_fields = (render_data_func or render_data)(mi, all_fields=all_fields,
@@ -100,7 +101,7 @@ def get_field_list(fm, use_defaults=False):
 def render_data(mi, use_roman_numbers=True, all_fields=False):
     field_list = get_field_list(getattr(mi, 'field_metadata', field_metadata))
     field_list = [(x, all_fields or display) for x, display in field_list]
-    return mi_to_html(mi, field_list=field_list, use_roman_numbers=use_roman_numbers,
+    return mi_to_html(mi, field_list=field_list, use_roman_numbers=use_roman_numbers, rtl=is_rtl(),
                       rating_font=rating_font(), default_author_link=gprefs.get('default_author_link'))
 
 # }}}

src/calibre/gui2/viewer/ui.py

@@ -21,6 +21,7 @@ from calibre.gui2.viewer.documentview import DocumentView
 from calibre.gui2.viewer.bookmarkmanager import BookmarkManager
 from calibre.gui2.viewer.toc import TOCView, TOCSearch
 from calibre.gui2.viewer.footnote import FootnotesView
+from calibre.utils.localization import is_rtl
 
 class DoubleSpinBox(QDoubleSpinBox):  # {{{
 
@@ -85,7 +86,7 @@ class Metadata(QWebView):  # {{{
         from calibre.ebooks.metadata.book.render import mi_to_html
 
         def render_data(mi, use_roman_numbers=True, all_fields=False):
-            return mi_to_html(mi, use_roman_numbers=use_roman_numbers, rating_font=rating_font())
+            return mi_to_html(mi, use_roman_numbers=use_roman_numbers, rating_font=rating_font(), rtl=is_rtl())
 
         mi = opf.to_book_metadata()
         html = render_html(mi, self.css, True, self, render_data_func=render_data)

src/calibre/utils/localization.py

@@ -81,6 +81,9 @@ def get_lang():
         lang = 'en'
     return lang
 
+def is_rtl():
+    return get_lang()[:2].lower() in {'he', 'ar'}
+
 def get_lc_messages_path(lang):
     hlang = None
     if zf_exists():