Coverbrowser: event for cache refreshing (#10956)

frontend/apps/filemanager/filemanagerbookinfo.lua

@@ -164,12 +164,7 @@ function BookInfo:show(file, book_props)
             self.custom_doc_settings = nil
             self.custom_book_cover = nil
             if self.prop_updated then
-                local ui = self.ui -- Reader
-                        or require("apps/filemanager/filemanager").instance -- FM, Hist/Coll over FM
-                        or require("apps/reader/readerui").instance -- Hist/Coll over Reader
-                if ui.coverbrowser then -- refresh cache db
-                    ui.coverbrowser:deleteBookInfo(file)
-                end
+                UIManager:broadcastEvent(Event:new("InvalidateMetadataCache", file))
                 UIManager:broadcastEvent(Event:new("BookMetadataChanged", self.prop_updated))
             end
         end,

frontend/apps/filemanager/filemanagerutil.lua

@@ -5,6 +5,7 @@ This module contains miscellaneous helper functions for FileManager
 local BD = require("ui/bidi")
 local Device = require("device")
 local DocSettings = require("docsettings")
+local Event = require("ui/event")
 local UIManager = require("ui/uimanager")
 local ffiutil = require("ffi/util")
 local util = require("util")
@@ -161,16 +162,12 @@ function filemanagerutil.genResetSettingsButton(file, caller_callback, button_di
                 ok_callback = function()
                     local data_to_purge = {
                         doc_settings         = check_button_settings.checked,
-                        custom_cover_file    = check_button_cover.checked and custom_cover_file,
-                        custom_metadata_file = check_button_metadata.checked and custom_metadata_file,
+                        custom_cover_file    = check_button_cover.checked,
+                        custom_metadata_file = check_button_metadata.checked,
                     }
                     DocSettings:open(file):purge(nil, data_to_purge)
                     if data_to_purge.custom_cover_file or data_to_purge.custom_metadata_file then
-                        local ui = require("apps/filemanager/filemanager").instance
-                                or require("apps/reader/readerui").instance
-                        if ui and ui.coverbrowser then
-                            ui.coverbrowser:deleteBookInfo(file) -- refresh coverbrowser cached book info
-                        end
+                        UIManager:broadcastEvent(Event:new("InvalidateMetadataCache", file))
                     end
                     if data_to_purge.doc_settings then
                         require("readhistory"):fileSettingsPurged(file)

plugins/coverbrowser.koplugin/main.lua

@@ -106,7 +106,6 @@ function CoverBrowser:addToMainMenu(menu_items)
                     self:setupCollectionDisplayMode(mode)
                 end
             end,
-            separator = i == #modes,
         })
         table.insert(history_sub_item_table, {
             text = text,
@@ -127,6 +126,7 @@ function CoverBrowser:addToMainMenu(menu_items)
             end,
         })
     end
+    sub_item_table[#modes].separator = true
     table.insert(sub_item_table, {
         text = _("Use this mode everywhere"),
         checked_func = function()
@@ -671,8 +671,9 @@ function CoverBrowser:getBookInfo(file)
     return BookInfoManager:getBookInfo(file)
 end
 
-function CoverBrowser:deleteBookInfo(file)
+function CoverBrowser:onInvalidateMetadataCache(file)
     BookInfoManager:deleteBookInfo(file)
+    return true
 end
 
 function CoverBrowser:extractBooksInDirectory(path)