[chore] CoverBrowser: avoid page info code duplication (#3835)

Also allows full refresh with small diagonal swipe
of Menu instances (TOC, bookmarks)

frontend/ui/widget/menu.lua

@@ -810,6 +810,30 @@ function Menu:onCloseWidget()
     UIManager:setDirty(nil, "partial")
 end
 
+function Menu:updatePageInfo(select_number)
+    if self.item_group[1] then
+        if Device:hasKeys() then
+            -- reset focus manager accordingly
+            self.selected = { x = 1, y = select_number }
+        end
+        -- update page information
+        self.page_info_text:setText(util.template(_("page %1 of %2"), self.page, self.page_num))
+        self.page_info_left_chev:showHide(self.page_num > 1)
+        self.page_info_right_chev:showHide(self.page_num > 1)
+        self.page_info_first_chev:showHide(self.page_num > 2)
+        self.page_info_last_chev:showHide(self.page_num > 2)
+        self.page_return_arrow:showHide(self.onReturn ~= nil)
+
+        self.page_info_left_chev:enableDisable(self.page > 1)
+        self.page_info_right_chev:enableDisable(self.page < self.page_num)
+        self.page_info_first_chev:enableDisable(self.page > 1)
+        self.page_info_last_chev:enableDisable(self.page < self.page_num)
+        self.page_return_arrow:enableDisable(#self.paths > 0)
+    else
+        self.page_info_text:setText(_("No choices available"))
+    end
+end
+
 function Menu:updateItems(select_number)
     local old_dimen = self.dimen and self.dimen:copy()
     -- self.layout must be updated for focusmanager
@@ -871,27 +895,8 @@ function Menu:updateItems(select_number)
             table.insert(self.layout, {item_tmp})
         end -- if i <= self.items
     end -- for c=1, self.perpage
-    if self.item_group[1] then
-        if Device:hasKeys() then
-            -- reset focus manager accordingly
-            self.selected = { x = 1, y = select_number }
-        end
-        -- update page information
-        self.page_info_text:setText(util.template(_("page %1 of %2"), self.page, self.page_num))
-        self.page_info_left_chev:showHide(self.page_num > 1)
-        self.page_info_right_chev:showHide(self.page_num > 1)
-        self.page_info_first_chev:showHide(self.page_num > 2)
-        self.page_info_last_chev:showHide(self.page_num > 2)
-        self.page_return_arrow:showHide(self.onReturn ~= nil)
 
-        self.page_info_left_chev:enableDisable(self.page > 1)
-        self.page_info_right_chev:enableDisable(self.page < self.page_num)
-        self.page_info_first_chev:enableDisable(self.page > 1)
-        self.page_info_last_chev:enableDisable(self.page < self.page_num)
-        self.page_return_arrow:enableDisable(#self.paths > 0)
-    else
-        self.page_info_text:setText(_("No choices available"))
-    end
+    self:updatePageInfo(select_number)
 
     UIManager:setDirty("all", function()
         local refresh_dimen =
@@ -1119,6 +1124,9 @@ function Menu:onSwipe(arg, ges_ev)
         self:onNextPage()
     elseif ges_ev.direction == "east" then
         self:onPrevPage()
+    else
+        -- trigger full refresh
+        UIManager:setDirty(nil, "full")
     end
 end
 

plugins/coverbrowser.koplugin/covermenu.lua

@@ -1,4 +1,3 @@
-local Device = require("device")
 local DocumentRegistry = require("document/documentregistry")
 local FileManagerBookInfo = require("apps/filemanager/filemanagerbookinfo")
 local ImageViewer = require("ui/widget/imageviewer")
@@ -6,7 +5,6 @@ local Menu = require("ui/widget/menu")
 local TextViewer = require("ui/widget/textviewer")
 local UIManager = require("ui/uimanager")
 local logger = require("logger")
-local util = require("ffi/util")
 local _ = require("gettext")
 
 local BookInfoManager = require("bookinfomanager")
@@ -87,27 +85,8 @@ function CoverMenu:updateItems(select_number)
     current_cover_specs = self.cover_specs
 
     -- As done in Menu:updateItems()
-    if self.item_group[1] then
-        if Device:hasKeys() then
-            -- reset focus manager accordingly
-            self.selected = { x = 1, y = select_number }
-        end
-        -- update page information
-        self.page_info_text:setText(util.template(_("page %1 of %2"), self.page, self.page_num))
-        self.page_info_left_chev:showHide(self.page_num > 1)
-        self.page_info_right_chev:showHide(self.page_num > 1)
-        self.page_info_first_chev:showHide(self.page_num > 2)
-        self.page_info_last_chev:showHide(self.page_num > 2)
-        self.page_return_arrow:showHide(self.onReturn ~= nil)
-
-        self.page_info_left_chev:enableDisable(self.page > 1)
-        self.page_info_right_chev:enableDisable(self.page < self.page_num)
-        self.page_info_first_chev:enableDisable(self.page > 1)
-        self.page_info_last_chev:enableDisable(self.page < self.page_num)
-        self.page_return_arrow:enableDisable(#self.paths > 0)
-    else
-        self.page_info_text:setText(_("No choices available"))
-    end
+    self:updatePageInfo(select_number)
+
     UIManager:setDirty("all", function()
         local refresh_dimen =
             old_dimen and old_dimen:combine(self.dimen)