Pass book info to search worker only once per book

src/pyj/read_book/search.pyj

@@ -9,7 +9,7 @@ from complete import create_search_bar
 from dom import add_extra_css, build_rule, svgicon
 from gettext import gettext as _
 from modals import error_dialog
-from read_book.globals import ui_operations
+from read_book.globals import ui_operations, current_book
 from read_book.resources import text_from_serialized_html
 from read_book.search_worker import (
     CONNECT_FAILED, DB_ERROR, GET_SPINE_FAILED, UNHANDLED_ERROR, worker_main
@@ -56,15 +56,14 @@ class SearchOverlay:
         if not self._worker:
             self._worker = start_worker('read_book.search')
             self._worker.onmessage = self.on_worker_message
+            self.clear_caches()
         return self._worker
 
     def queue_search(self, query, book, current_name):
-        spine = book.manifest.spine
         self.request_counter += 1
         self.search_in_flight_id = self.request_counter
         self.worker.postMessage({
-            'type': 'search', 'book_hash': book.book_hash, 'spine': spine, 'current_name': current_name,
+            'type': 'search', 'current_name': current_name, 'id': self.request_counter, 'query': query
-            'id': self.request_counter, 'stored_files': book.stored_files, 'query': query
         })
 
     def on_worker_message(self, evt):
@@ -88,9 +87,11 @@ class SearchOverlay:
             elif msg.type is 'search_result':
                 pass
 
-    def clear_caches(self):
+    def clear_caches(self, book):
         if self._worker:
-            self.worker.postMessage({'type': 'clear_caches'})
+            book = book or current_book()
+            data = {'book_hash': book.book_hash, 'stored_files': book.stored_files, 'spine': book.manifest.spine}
+            self.worker.postMessage({'type': 'clear_caches', 'book': data})
 
     def onkeydown(self, event):
         if event.key is 'Escape' or event.key is 'Esc':

src/pyj/read_book/search_worker.pyj

@@ -94,6 +94,7 @@ class Worker:
         self.searching = False
         self.current_query = None
         self.current_query_id = None
+        self.current_book = None
         self.text_cache = {}
         self.regex = None
         self.result_num = 0
@@ -120,7 +121,7 @@ def search_in_text_of(name):
     r.lastIndex = 0
     haystack = wc.text_cache[name][0] or ''
     match_counts = {}
-    spine_idx = wc.current_query.spine.indexOf(name)
+    spine_idx = wc.current_book.spine.indexOf(name)
     while True:
         m = r.exec(haystack)
         if not m:
@@ -142,8 +143,8 @@ def search_in_text_of(name):
 
 
 def queue_next_spine_item(spine_idx, allow_current_name):
-    spine_idx %= wc.current_query.spine.length
+    spine_idx %= wc.current_book.spine.length
-    name = wc.current_query.spine[spine_idx]
+    name = wc.current_book.spine[spine_idx]
     if not name or (not allow_current_name and name is wc.current_query.current_name):
         send_search_complete()
         return
@@ -152,14 +153,14 @@ def queue_next_spine_item(spine_idx, allow_current_name):
         setTimeout(queue_next_spine_item.bind(None, spine_idx + 1), 0)
         return
     query = wc.current_query
-    wc.db.get_book_file(query.book_hash, query.stored_files, name, got_spine_item.bind(None, query.id, spine_idx))
+    wc.db.get_book_file(wc.current_book.book_hash, wc.current_book.stored_files, name, got_spine_item.bind(None, query.id, spine_idx))
 
 
 def got_spine_item(query_id, spine_idx, result):
     if query_id is not wc.current_query_id:
         return
     if result.ok:
-        name = wc.current_query.spine[spine_idx]
+        name = wc.current_book.spine[spine_idx]
         wc.text_cache[name] = text_from_serialized_html(result.result, True)
         search_in_text_of(name)
         setTimeout(queue_next_spine_item.bind(None, spine_idx + 1), 0)
@@ -191,12 +192,12 @@ def perform_search(query):
     wc.current_query = query
     wc.current_query_id = query.id
     wc.result_num = 0
-    if not query.spine?.length or not query.query.text:
+    if not wc.current_book or not wc.current_book.spine?.length or not query.query.text:
         send_search_complete()
         return
     wc.regex = regex_for_query(query.query)
 
-    idx = query.spine.indexOf(query.current_name)
+    idx = wc.current_book.spine.indexOf(query.current_name)
     if idx < 0:
         idx = 0
     queue_next_spine_item(idx, True)
@@ -234,6 +235,7 @@ def worker_main():
                 wc.pending_search = e.data
         elif e.data.type is 'clear_caches':
             wc.clear_caches()
+            wc.current_book = e.data.book
 
     self.addEventListener('error', def (e):
         send_error(UNHANDLED_ERROR, f'{e.lineno}:{e.message}' + '\n\n' + format_exception(e.error).join(''))

src/pyj/read_book/view.pyj

@@ -932,7 +932,7 @@ class View:
             self.loaded_resources = {}
             self.content_popup_overlay.loaded_resources = {}
             self.timers.start_book(book)
-            self.search_overlay.clear_caches()
+            self.search_overlay.clear_caches(book)
         unkey = username_key(get_interface_data().username)
         self.book = current_book.book = book
         hl = None