Device books view: Add an action to the context menu to easily jump to the matching book in the calibre library view. Fixes #1903418 [Enhancement Request: Device view - book details window shows info from matching book in library](https://bugs.launchpad.net/calibre/+bug/1903418)

src/calibre/customize/builtins.py

@@ -1022,6 +1022,12 @@ class ActionMatchBooks(InterfaceActionBase):
     description = _('Match book on the devices to books in the library')
 
 
+class ActionShowMatchedBooks(InterfaceActionBase):
+    name = 'Show Matched Book In Library'
+    actual_plugin = 'calibre.gui2.actions.match_books:ShowMatchedBookAction'
+    description = _('Show the book in the calibre library that matches this book')
+
+
 class ActionCopyToLibrary(InterfaceActionBase):
     name = 'Copy To Library'
     actual_plugin = 'calibre.gui2.actions.copy_to_library:CopyToLibraryAction'
@@ -1101,7 +1107,7 @@ plugins += [ActionAdd, ActionFetchAnnotations, ActionGenerateCatalog,
         ActionFetchNews, ActionSaveToDisk, ActionQuickview, ActionPolish,
         ActionShowBookDetails,ActionRestart, ActionOpenFolder, ActionConnectShare,
         ActionSendToDevice, ActionHelp, ActionPreferences, ActionSimilarBooks,
-        ActionAddToLibrary, ActionEditCollections, ActionMatchBooks, ActionChooseLibrary,
+        ActionAddToLibrary, ActionEditCollections, ActionMatchBooks, ActionShowMatchedBooks, ActionChooseLibrary,
         ActionCopyToLibrary, ActionTweakEpub, ActionUnpackBook, ActionNextMatch, ActionStore,
         ActionPluginUpdater, ActionPickRandom, ActionEditToC, ActionSortBy,
         ActionMarkBooks, ActionEmbed, ActionTemplateTester, ActionTagMapper, ActionAuthorMapper,

src/calibre/db/cache.py

@@ -1905,6 +1905,14 @@ class Cache(object):
         self.clear_search_caches()
         self.clear_composite_caches()
 
+    @read_api
+    def books_matching_device_book(self, lpath):
+        ans = set()
+        for book_id, (_, _, _, _, lpaths) in self.fields['ondevice'].cache.items():
+            if lpath in lpaths:
+                ans.add(book_id)
+        return ans
+
     @read_api
     def tags_older_than(self, tag, delta=None, must_have_tag=None, must_have_authors=None):
         '''

src/calibre/gui2/__init__.py

@@ -117,7 +117,8 @@ def create_defs():
 
     defs['action-layout-context-menu-device'] = (
             'View', 'Save To Disk', None, 'Remove Books', None,
-            'Add To Library', 'Edit Collections', 'Match Books'
+            'Add To Library', 'Edit Collections', 'Match Books',
+            'Show Matched Book In Library'
             )
 
     defs['action-layout-context-menu-cover-browser'] = (

src/calibre/gui2/actions/match_books.py

@@ -6,7 +6,7 @@ __license__   = 'GPL v3'
 __copyright__ = '2013, Kovid Goyal <kovid@kovidgoyal.net>'
 __docformat__ = 'restructuredtext en'
 
-from calibre.gui2 import error_dialog
+from calibre.gui2 import error_dialog, question_dialog
 from calibre.gui2.actions import InterfaceAction
 from calibre.gui2.dialogs.match_books import MatchBooks
 
@@ -38,3 +38,45 @@ class MatchBookAction(InterfaceAction):
 
         id_ = view.model().indices(rows)[0]
         MatchBooks(self.gui, view, id_, rows[0]).exec_()
+
+
+class ShowMatchedBookAction(InterfaceAction):
+
+    name = 'Show Matched Book In Library'
+    action_spec = (_('Show matched book in library'), 'lt.png',
+            _('Show the book in the calibre library that matches this book'),
+            ())
+    dont_add_to = frozenset(('menubar', 'toolbar', 'context-menu', 'toolbar-child', 'context-menu-cover-browser'))
+    action_type = 'current'
+
+    def genesis(self):
+        self.qaction.triggered.connect(self.show_matched_books_in_library)
+
+    def location_selected(self, loc):
+        enabled = loc != 'library'
+        self.qaction.setEnabled(enabled)
+        self.menuless_qaction.setEnabled(enabled)
+
+    def show_matched_books_in_library(self, *args):
+        view = self.gui.current_view()
+        rows = view.selectionModel().selectedRows()
+        if not rows or len(rows) != 1:
+            d = error_dialog(self.gui, _('Match books'), _('You must select one book'))
+            d.exec_()
+            return
+
+        device_book_index = view.model().indices(rows)[0]
+        device_db = view.model().db
+        db = self.gui.current_db.new_api
+        book = device_db[device_book_index]
+        matching_book_ids = db.books_matching_device_book(book.lpath)
+        if not matching_book_ids:
+            if question_dialog(self.gui, _('No matching books'), _(
+                'No matching books found in the calibre library. Do you want to specify the'
+                ' matching book manually?')):
+                MatchBooks(self.gui, view, device_book_index, rows[0]).exec_()
+            return
+        ids = tuple(sorted(matching_book_ids, reverse=True))
+        self.gui.library_view.select_rows(ids)
+        self.gui.show_library_view()
+        self.gui.iactions['Edit Metadata'].refresh_books_after_metadata_edit(ids)

src/calibre/gui2/ui.py

@@ -808,6 +808,9 @@ class Main(MainWindow, MainWindowMixin, DeviceMixin, EmailMixin,  # {{{
         if idx == 3:
             return self.card_b_view
 
+    def show_library_view(self):
+        self.location_manager.library_action.trigger()
+
     def booklists(self):
         return self.memory_view.model().db, self.card_a_view.model().db, self.card_b_view.model().db