(autohotkey) gui function that remembers the previously used x/y/w/h value

xywh.ahk

xywh(x:="", y:="", w:="", h:="") {
    return value("x", x) . value("y", y) . value("w", w) . value("h", h)
}

value(letter, v) {
    static prev_x, prev_y, prev_w, prev_h

    if v contains +,-
        v := eval(prev_%letter% . v)

    if v is number
        return letter . (prev_%letter% := v) " "
    else if v is space  ; if empty
        return letter . prev_%letter% " "
}

eval(string) {
    s := strSplit(string, ["+", "-"], a_space)
    return inStr(string, "+") ? (s[1] + s[2]) : (s[1] - s[2])
}


/*
[script info]
version     = 1
description = gui function that remembers the previously used x/y/w/h value
author      = davebrny
source      = https://gist.github.com/davebrny/d0e3a42ed3303fc110469b15324230ac
*/