Book details panel: Make series and tags clickable. Clicking on them will search the calibre library for all books in the same series/ having the same tag

Fixes #1341297 [[Enhancement] make series name (in book details) a link/clickable](https://bugs.launchpad.net/calibre/+bug/1341297)

resources/templates/book_details.css

@@ -31,12 +31,12 @@ table.fields td.title {
 }
 
 /*
-The HTML that this styleshhet applies to looks like this:
+The HTML that this stylesheet applies to looks like this:
 
 <table class="fields">
     <tr id="formats" class="datatype_text"><td class="title">Formats:</td><td><a href="format:572:EPUB">EPUB</a>, <a href="format:572:LIT">LIT</a></td></tr>
-    <tr id="series" class="datatype_series"><td class="title">Series:</td><td>Book II of <span class="series_name">The Sea Beggars</span></td></tr>
+    <tr id="series" class="datatype_series"><td class="title">Series:</td><td>Book II of <a href="..."><span class="series_name">The Sea Beggars</span></a></td></tr>
-    <tr id="tags" class="datatype_text"><td class="title">Tags:</td><td>Fantasy, Fiction</td></tr>
+    <tr id="tags" class="datatype_text"><td class="title">Tags:</td><td><a href="...">Fantasy</a>, <a href="...">Fiction</a></td></tr>
     <tr id="path" class="datatype_text"><td class="title">Path:</td><td><a href="path:572" title="/home/kovid/test library/Paul Kearney/This Forsaken Earth (572)">Click to open</a></td></tr>
 </table>
 

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

@@ -8,6 +8,7 @@ __copyright__ = '2014, Kovid Goyal <kovid at kovidgoyal.net>'
 
 import os
 from functools import partial
+from binascii import hexlify
 
 from calibre import prepare_string_for_xml, force_unicode
 from calibre.ebooks.metadata import fmt_sidx
@@ -45,6 +46,10 @@ def get_field_list(mi):
     for field in sorted(displayable_field_keys(mi), key=partial(field_sort, mi)):
         yield field, True
 
+def search_href(search_term, value):
+    search = '%s:"=%s"' % (search_term, value.replace('"', '\\"'))
+    return prepare_string_for_xml('search:' + hexlify(search.encode('utf-8')), True)
+
 def mi_to_html(mi, field_list=None, default_author_link=None, use_roman_numbers=True, rating_font='Liberation Serif'):
     if field_list is None:
         field_list = get_field_list(mi)
@@ -166,13 +171,36 @@ def mi_to_html(mi, field_list=None, default_author_link=None, use_roman_numbers=
                 sidx = mi.get(field+'_index')
                 if sidx is None:
                     sidx = 1.0
-                val = _('Book %(sidx)s of <span class="series_name">%(series)s</span>')%dict(
+                try:
-                        sidx=fmt_sidx(sidx, use_roman=use_roman_numbers),
+                    st = metadata['search_terms'][0]
-                        series=p(getattr(mi, field)))
+                except Exception:
+                    st = field
+                series = getattr(mi, field)
+                val = _(
+                    'Book %(sidx)s of <a href="%(href)s" title="%(tt)s">'
+                    '<span class="%(cls)s">%(series)s</span></a>') % dict(
+                        sidx=fmt_sidx(sidx, use_roman=use_roman_numbers), cls="series_name",
+                        series=p(series), href=search_href(st, series),
+                        tt=p(_('Click to see books in this series')))
             elif metadata['datatype'] == 'datetime':
                 aval = getattr(mi, field)
                 if is_date_undefined(aval):
                     continue
+            elif metadata['datatype'] == 'text' and metadata['is_multiple']:
+                try:
+                    st = metadata['search_terms'][0]
+                except Exception:
+                    st = field
+                links = ['<a href="%s" title="%s">%s</a>' % (
+                    search_href(st, x), _('Click to see books with {0}: {1}').format(metadata['name'], x), x)
+                         for x in mi.get(field)]
+                val = metadata['is_multiple']['list_to_ui'].join(links)
+            elif metadata['datatype'] == 'enumeration':
+                try:
+                    st = metadata['search_terms'][0]
+                except Exception:
+                    st = field
+                val = '<a href="%s" title="%s">%s</a>' % (search_href(st, val), _('Click to see books with {0}: {1}').format(metadata['name'], val), val)
 
             ans.append((field, row % (name, val)))
 

src/calibre/gui2/book_details.py

@@ -5,6 +5,8 @@ __license__   = 'GPL v3'
 __copyright__ = '2010, Kovid Goyal <kovid@kovidgoyal.net>'
 __docformat__ = 'restructuredtext en'
 
+from binascii import unhexlify
+
 from PyQt4.Qt import (QPixmap, QSize, QWidget, Qt, pyqtSignal, QUrl, QIcon,
     QPropertyAnimation, QEasingCurve, QApplication, QFontInfo, QAction,
     QSizePolicy, QPainter, QRect, pyqtProperty, QLayout, QPalette, QMenu,
@@ -500,6 +502,7 @@ class BookDetails(QWidget):  # {{{
     show_book_info = pyqtSignal()
     open_containing_folder = pyqtSignal(int)
     view_specific_format = pyqtSignal(int, object)
+    search_requested = pyqtSignal(object)
     remove_specific_format = pyqtSignal(int, object)
     save_specific_format = pyqtSignal(int, object)
     restore_specific_format = pyqtSignal(int, object)
@@ -581,7 +584,7 @@ class BookDetails(QWidget):  # {{{
         self.setCursor(Qt.PointingHandCursor)
 
     def handle_click(self, link):
-        typ, _, val = link.partition(':')
+        typ, val = link.partition(':')[0::2]
         if typ == 'path':
             self.open_containing_folder.emit(int(val))
         elif typ == 'format':
@@ -589,6 +592,8 @@ class BookDetails(QWidget):  # {{{
             self.view_specific_format.emit(int(id_), fmt)
         elif typ == 'devpath':
             self.view_device_book.emit(val)
+        elif typ == 'search':
+            self.search_requested.emit(unhexlify(val).decode('utf-8'))
         else:
             try:
                 open_url(QUrl(link, QUrl.TolerantMode))

src/calibre/gui2/init.py

@@ -445,6 +445,7 @@ class LayoutMixin(object):  # {{{
                 type=Qt.QueuedConnection)
         self.book_details.open_containing_folder.connect(self.iactions['View'].view_folder_for_id)
         self.book_details.view_specific_format.connect(self.iactions['View'].view_format_by_id)
+        self.book_details.search_requested.connect(self.search.set_search_string)
         self.book_details.remove_specific_format.connect(
                 self.iactions['Remove Books'].remove_format_by_id)
         self.book_details.save_specific_format.connect(