Load plugins also in FileManager (#2426)

added is_doc_only plugin attribute

frontend/apps/filemanager/filemanager.lua

@@ -26,6 +26,7 @@ local _ = require("gettext")
 local KeyValuePage = require("ui/widget/keyvaluepage")
 local ReaderUI = require("apps/reader/readerui")
 local InfoMessage = require("ui/widget/infomessage")
+local PluginLoader = require("pluginloader")
 
 local function getDefaultDir()
     if Device:isKindle() then
@@ -293,9 +294,18 @@ function FileManager:init()
     table.insert(self, self.menu)
     table.insert(self, FileManagerHistory:new{
         ui = self,
-        menu = self.menu
     })
 
+    self.loaded_modules = {}
+    -- koreader plugins
+    for _,plugin_module in ipairs(PluginLoader:loadPlugins()) do
+        DEBUG("Loaded plugin", plugin_module.name, "at", plugin_module.path)
+        if not plugin_module.is_doc_only then
+            -- Keep references to the modules which do not register into menu.
+            table.insert(self.loaded_modules, plugin_module:new{ ui = self, })
+        end
+    end
+
     if Device:hasKeys() then
         self.key_events.Close = { {"Home"}, doc = "Close file manager" }
     end

frontend/apps/filemanager/filemanagermenu.lua

@@ -51,6 +51,9 @@ function FileManagerMenu:init()
             end,
         },
     }
+    -- For backward compatibility, plugins look for plugins tab, which should be tools tab in file
+    -- manager.
+    self.tab_item_table.plugins = self.tab_item_table.tools
     self.registered_widgets = {}
 
     if Device:hasKeys() then

frontend/apps/reader/readerui.lua

@@ -43,7 +43,7 @@ local FileManagerHistory = require("apps/filemanager/filemanagerhistory")
 local ReaderSearch = require("apps/reader/modules/readersearch")
 local ReaderLink = require("apps/reader/modules/readerlink")
 local ReaderStatus = require("apps/reader/modules/readerstatus")
-local PluginLoader = require("apps/reader/pluginloader")
+local PluginLoader = require("pluginloader")
 
 --[[
 This is an abstraction for a reader interface

plugins/evernote.koplugin/main.lua

@@ -16,6 +16,7 @@ local MyClipping = require("clip")
 
 local EvernoteExporter = InputContainer:new{
     name = "evernote",
+    is_doc_only = true,
     login_title = _("Login to Evernote"),
     notebook_name = _("KOReader Notes"),
     evernote_domain = nil,

plugins/hello.koplugin/main.lua

@@ -0,0 +1,27 @@
+local InfoMessage = require("ui/widget/infomessage")
+local UIManager = require("ui/uimanager")
+local WidgetContainer = require("ui/widget/container/widgetcontainer")
+local _ = require("gettext")
+
+local Hello = WidgetContainer:new{
+    name = 'Hello',
+    is_doc_only = false,
+    disabled = true,  -- This is a debug plugin
+}
+
+function Hello:init()
+    self.ui.menu:registerToMainMenu(self)
+end
+
+function Hello:addToMainMenu(tab_item_table)
+    table.insert(tab_item_table.plugins, {
+        text = _("Hello World"),
+        callback_func = function()
+            UIManager:show(InfoMessage:new{
+                text = _("Hello, docless plugin world"),
+            })
+        end,
+    })
+end
+
+return Hello

plugins/kosync.koplugin/main.lua

@@ -20,6 +20,7 @@ end
 
 local KOSync = InputContainer:new{
     name = "kosync",
+    is_doc_only = true,
     title = _("Register/login to KOReader server"),
 
     page_update_times = 0,

plugins/statistics.koplugin/main.lua

@@ -21,6 +21,7 @@ local statistics_dir = DataStorage:getDataDir() .. "/statistics/"
 local page_max_time
 
 local ReaderStatistics = InputContainer:new {
+    is_doc_only = true,
     last_time = nil,
     page_min_read_sec = 5,
     page_max_read_sec = 90,

plugins/zsync.koplugin/main.lua

@@ -14,6 +14,7 @@ int rmdir(const char *);
 require("ffi/zeromq_h")
 local ZSync = InputContainer:new{
     name = "zsync",
+    is_doc_only = true,
 }
 
 function ZSync:init()