Show page number in sync prompt instead of percentage

main.lua

@@ -965,14 +965,24 @@ function Bookhoard:_doGetProgress(interactive)
 
         local nav_target = progress.koreader_xpointer or progress.epubcfi or progress.page
 
+        local sync_text
+        if not self.ui.document.info.has_pages then
+            local total = self.ui.document:getPageCount()
+            local target_page = math.min(Math.round(server_percentage * total), total)
+            sync_text = T(_("Sync to page %1 of %2 from server?"), target_page, total)
+        else
+            sync_text = T(_("Sync to page %1 of %2 from server?"),
+                Math.round(server_percentage * (progress.total_pages or 1)),
+                progress.total_pages or "?")
+        end
+
         if self_older then
             if self.settings.sync_forward == SYNC_STRATEGY.SILENT then
                 self:syncToProgress(nav_target, server_percentage)
                 self:_showSyncedMessage()
             elseif self.settings.sync_forward == SYNC_STRATEGY.PROMPT then
                 UIManager:show(ConfirmBox:new{
-                    text = T(_("Sync to newer location %1%% from server?"),
+                    text = sync_text,
-                        Math.round(server_percentage * 100)),
                     ok_callback = function()
                         self:syncToProgress(nav_target, server_percentage)
                     end,
@@ -984,8 +994,7 @@ function Bookhoard:_doGetProgress(interactive)
                 self:_showSyncedMessage()
             elseif self.settings.sync_backward == SYNC_STRATEGY.PROMPT then
                 UIManager:show(ConfirmBox:new{
-                    text = T(_("Sync to previous location %1%% from server?"),
+                    text = sync_text,
-                        Math.round(server_percentage * 100)),
                     ok_callback = function()
                         self:syncToProgress(nav_target, server_percentage)
                     end,