typo3: multiple if conditions for wrap

I have a menu with links which contain images set on page "media" field. There are also 2 fields called tx_hide_mobile and tx_hide_desktop. Depending on their value, I have to add css classes "hideonmobile" or "hideondesktop" or none. This is the typolink part of the menu items:

            typolink.ATagParams.cObject = COA
            typolink.ATagParams.cObject {
                10 = IMG_RESOURCE
                10 {
                    file {
                        import.cObject = FILES
                        import.cObject {
                            references {
                                table = pages
                                uid.field = uid
                                fieldName = media
                            }
                            renderObj = IMG_RESOURCE
                            renderObj {
                                file.width = 39
                                file.height = 39
                                required = 1
                                file.import.data = file:current:originalUid
                            }
                        }
                    }
                }

                wrap = class="mservice" style="background-image:url('{$protocol}://{$host}/|')"

                wrap.cObject = COA
                wrap.cObject {
                    10 = TEXT
                    10.value = class="mservice hideonmobile" style="background-image:url('{$protocol}://{$host}/|')"
                    10.if {
                        value.field = tx_hide_mobile
                        equals = 1
                    }

                    20 = TEXT
                    20.value = class="mservice hideondesktop" style="background-image:url('{$protocol}://{$host}/|')"
                    20.if {
                        value.field = tx_hide_desktop
                        equals = 1
                    }
                }
            }

How can I make the test for the mobile and desktop fields, and still keep the default value (with only mservice class) if none of the 2 fields is set?