fix #1024

if toc item has expand/collapse state and tap select on the left side
the state switch action is triggered, otherwise goto the
linked page.

frontend/apps/reader/modules/readertoc.lua

@@ -304,8 +304,15 @@ function ReaderToc:onShowToc()
         toc_menu,
     }
 
-    function toc_menu:onMenuChoice(item)
-        self.ui:handleEvent(Event:new("GotoPage", item.page))
+    function toc_menu:onMenuSelect(item, pos)
+        -- if toc item has expand/collapse state and tap select on the left side
+        -- the state switch action is triggered, otherwise goto the linked page
+        if item.state and pos.x < 0.5 then
+            item.state.callback()
+        else
+            toc_menu:close_callback()
+            self.ui:handleEvent(Event:new("GotoPage", item.page))
+        end
     end
 
     toc_menu.close_callback = function()

frontend/ui/widget/menu.lua

@@ -270,24 +270,34 @@ function MenuItem:onShowItemDetail()
     return true
 end
 
-function MenuItem:onTapSelect()
+function MenuItem:getGesPosition(ges)
+    local dimen = self[1].dimen
+    return {
+        x = (ges.pos.x - dimen.x)/dimen.w,
+        y = (ges.pos.y - dimen.y)/dimen.h,
+    }
+end
+
+function MenuItem:onTapSelect(arg, ges)
+    local pos = self:getGesPosition(ges)
     self[1].invert = true
     UIManager:setDirty(self.show_parent, "partial")
     UIManager:scheduleIn(0.1, function()
         self[1].invert = false
         UIManager:setDirty(self.show_parent, "partial")
-        self.menu:onMenuSelect(self.table)
+        self.menu:onMenuSelect(self.table, pos)
     end)
     return true
 end
 
-function MenuItem:onHoldSelect()
+function MenuItem:onHoldSelect(arg, ges)
+    local pos = self:getGesPosition(ges)
     self[1].invert = true
     UIManager:setDirty(self.show_parent, "partial")
     UIManager:scheduleIn(0.1, function()
         self[1].invert = false
         UIManager:setDirty(self.show_parent, "partial")
-        self.menu:onMenuHold(self.table)
+        self.menu:onMenuHold(self.table, pos)
     end)
     return true
 end