[Non-touch] Add a menu item to toggle a bookmark on the current page (#4262)

frontend/apps/reader/modules/readerbookmark.lua

@@ -55,6 +55,14 @@ function ReaderBookmark:addToMainMenu(menu_items)
             self:onShowBookmark()
         end,
     }
+    if not Device:isTouchDevice() then
+        menu_items.toggle_bookmark = {
+            text_func = function() return self:isCurrentPageBookmarked() and _("Remove bookmark for current page") or _("Bookmark current page") end,
+            callback = function()
+                self:onToggleBookmark()
+            end,
+       }
+    end
     if self.ui.document.info.has_pages then
         menu_items.bookmark_browsing_mode = {
             text = self.bbm_menu_title,
@@ -158,6 +166,16 @@ function ReaderBookmark:onSaveSettings()
     self.ui.doc_settings:saveSetting("highlights_imported", true)
 end
 
+function ReaderBookmark:isCurrentPageBookmarked()
+    local pn_or_xp
+    if self.ui.document.info.has_pages then
+        pn_or_xp = self.view.state.page
+    else
+        pn_or_xp = self.ui.document:getXPointer()
+    end
+    return self:getDogearBookmarkIndex(pn_or_xp) and true or false
+end
+
 function ReaderBookmark:onToggleBookmark()
     local pn_or_xp
     if self.ui.document.info.has_pages then

frontend/ui/elements/reader_menu_order.lua

@@ -11,6 +11,7 @@ local order = {
     navi = {
         "table_of_contents",
         "bookmarks",
+        "toggle_bookmark",
         "bookmark_browsing_mode",
         "----------------------------",
         "go_to",