#Requires AutoHotkey v2.0
#SingleInstance force
SetTitleMatchMode(3)
SW := A_ScreenWidth
SH := A_ScreenHeight
Global Stretched := false
Global CursorLocked := false
Global CursorWasLockedBeforeFocusLoss := false
Global CursorAutoMode := true
Global GameWatcherRunning := false


; AutoHotkey script to make Path of Exile borderless windowed

;###Settings#####################################################################################

; Hotkey to trigger the resizing (you can change to any key you prefer)
; ^ = ctrl, + = shift, ! = alt more info about hotkeys can be found at https://www.autohotkey.com/docs/v1/Hotkeys.htm
Hotkey "^NumPad0", ToggleBoarderlessStretch
Hotkey "^NumPad5", ToggleAlwaysOnTop
Hotkey "^NumPad3", ToggleCursorLock

; Set the desired width and height for the borderless window
AutoH := SH/1.35 ; 1.35 is the default zoom modifiar. If you get black bars on your game's sides, put it lower start at 1.30, save & reload script till satisfied
DesiredWidth := SW ; Change to desirerd Width of the gaming window, Accepted Values: Value in Pixels, SW for Same Width as monitor
DesiredHeight := AutoH ; Change to desirerd Hight of the gaming window, Accepted Values: Value in Pixels, SH for Same Height as monitor, AutoH for Automatic stretched windowed


; Set desired window location
X := (SW - DesiredWidth)/2 ; Set the desirerd X location of the gaming window, Accepted Values: Value in Pixels 0 being all way left, (SW - DesiredWidth)/2 for automatic center
Y := 0 ; Set the desirerd Y location of the gaming window, Accepted Values: Value in Pixels 0 being all way top, (SH - DesiredHeight)/2 for automatic center, (SH - DesiredHeight) for all way at bottom

; Game name, change as necessary
GameTitle := "Path of Exile"
GameExe := "PathOfExile.exe"

;#############################################################################################

SetTimer(CheckWindowFocus, 200) ; Check window focus 5 times per second


ToggleAlwaysOnTop(ThisHotkey){
    ; Check if the game window is open
    if WinExist(GameTitle){
        ; Activate the game window found by WinExist
        WinActivate

        ; Remove the borders and title bar
        ; 0xC40000 = WS_BORDER (0x800000) + WS_DLGFRAME (0x400000) + WS_SIZEBOX aka WS_THICKFRAME (0x040000)
        WinSetAlwaysOnTop -1, GameTitle
    }
    else{
        MsgBox "Please launch game first.", "Game not found"
    }
}

ToggleBoarderlessStretch(ThisHotkey){
    Global Stretched
    ; Check if the game window is open
    if WinExist(GameTitle){
        ; Activate the game window found by WinExist
        WinActivate
        ;Check if already stretched windowed
        if !Stretched {
            Stretched := true
            ; Remove the borders and title bar
            ; 0xC40000 = WS_BORDER (0x800000) + WS_DLGFRAME (0x400000) + WS_SIZEBOX aka WS_THICKFRAME (0x040000)
            WinSetStyle("-0xC40000", GameTitle)
            ; Resize the window to borderless dimensions
            WinMove X, Y, DesiredWidth, DesiredHeight, GameTitle
            ; Else we return to original resolution
        }else{
            Stretched := false
            WinSetStyle("-0xC40000", GameTitle)
            WinMove 0, 0, SW, SH, GameTitle
        }
        ; Reapply cursor lock if active
        if CursorLocked {
            WinGetPos &winX, &winY, &winW, &winH, GameTitle
            rect := Buffer(16, 0)
            NumPut("Int", winX, rect, 0)
            NumPut("Int", winY, rect, 4)
            NumPut("Int", winX + winW, rect, 8)
            NumPut("Int", winY + winH, rect, 12)
            DllCall("ClipCursor", "Ptr", rect)
        }
        ;ExitApp
    }
    else{
        MsgBox "Please launch game first.", "Game not found"
    }
}

ToggleCursorLock(ThisHotkey) {
    Global CursorLocked, CursorAutoMode

    if CursorLocked {
        DllCall("ClipCursor", "Ptr", 0)
        CursorLocked := false
        CursorAutoMode := false ; prevent auto-relock
        ToolTip "Cursor Unlocked"
    } else {
        if WinExist(GameTitle) {
            WinGetPos &winX, &winY, &winW, &winH, GameTitle

            rect := Buffer(16, 0)
            NumPut("Int", winX, rect, 0)
            NumPut("Int", winY, rect, 4)
            NumPut("Int", winX + winW, rect, 8)
            NumPut("Int", winY + winH, rect, 12)
            DllCall("ClipCursor", "Ptr", rect)

            CursorLocked := true
            CursorAutoMode := true ; allow auto-relock
            ToolTip "Cursor Locked"
        } else {
            MsgBox "Game not found.", "Error"
        }
    }

    SetTimer () => ToolTip(), -1000
}

CheckWindowFocus() {
    Global CursorLocked, CursorWasLockedBeforeFocusLoss, CursorAutoMode, Stretched
    Global GameTitle, GameExe

    hwnd := WinExist(GameTitle)
    if !hwnd || WinGetProcessName(hwnd) != GameExe {
        Stretched := false
        if CursorLocked {
            DllCall("ClipCursor", "Ptr", 0)
            CursorLocked := false
            CursorWasLockedBeforeFocusLoss := false
            CursorAutoMode := true
            ToolTip "Game closed — cursor unlocked"
            SetTimer () => ToolTip(), -1000
        }

        ; Stop this timer, but ensure game watcher is running
        SetTimer(CheckWindowFocus, 0)
        StartGameWatcher()
        return
    }

    ; Game is running, handle cursor lock
    if WinActive(GameTitle) {
        if !CursorLocked && CursorWasLockedBeforeFocusLoss && CursorAutoMode {
            WinGetPos &winX, &winY, &winW, &winH, GameTitle
            rect := Buffer(16, 0)
            NumPut("Int", winX, rect, 0)
            NumPut("Int", winY, rect, 4)
            NumPut("Int", winX + winW, rect, 8)
            NumPut("Int", winY + winH, rect, 12)
            DllCall("ClipCursor", "Ptr", rect)
            CursorLocked := true
            CursorWasLockedBeforeFocusLoss := false
            ToolTip "Cursor re-locked"
            SetTimer () => ToolTip(), -1000
        }
    } else if CursorLocked {
        DllCall("ClipCursor", "Ptr", 0)
        CursorWasLockedBeforeFocusLoss := true
        CursorLocked := false
        ToolTip "Cursor auto-unlocked (focus lost)"
        SetTimer () => ToolTip(), -1000
    }
}

StartGameWatcher() {
    Global GameWatcherRunning

    if !GameWatcherRunning {
        SetTimer(CheckGameRunning, 2000)
        GameWatcherRunning := true
    }
}

CheckGameRunning() {
    Global GameTitle, GameExe, GameWatcherRunning

    hwnd := WinExist(GameTitle)
    if hwnd && WinGetProcessName(hwnd) = GameExe {
        SetTimer(CheckWindowFocus, 200)
        SetTimer(CheckGameRunning, 0)
        GameWatcherRunning := false
        ToolTip "Game relaunched — cursor tracking re-enabled"
        SetTimer () => ToolTip(), -1000
    }
}