写了一个用空格键当修饰键的 ahk 脚本，打字的时候不用移动手就能直接按到方向， backspace 之类的常用按键

按住空格键大概 0.1 秒之后，空格键变成修饰键，然后可以用 edsf 控制方向，wr 控制 home 跟 end，cv 控制 backspace 跟 del，其他键还是照常工作。根据个人习惯可以改其他快捷键。

用了这套快捷键之后根本停不下来，完全不用移动手腕就可以控制方向，删除打错的字符。在不支持 vim 命令的编辑器里面尤其方便。相比于用 ctrl，alt，shift 做快捷键，空格键更方便，大拇指直接按下去就可以了。唯一的问题就是按住空格不放不能重复输入空格了。我个人感觉这个基本没有影响。

网上有一个类似的脚本，不过打字比较快的时候容易出问题，我重写了一个改进版的，打字快的时候基本不会出错。这是我的第一个 ahk 脚本，有什么需要改进的地方，或者 ahk 高手看到有什么函数用错的地方，都欢迎提出来。

;
; AutoHotkey Version: 1.x
; Language:       English
; Platform:       Win9x/NT
; Author:         cy18 <thecy18@gmail.com>
;
; An improved script to use space as modifier
; In normal cases, if space is pressed for more than 0.1 second, it becomes a modifier, this time could be modified in the script
; If no other keys are pressed during space is pressed, a space is output when space is released
; Severial tunes are made so that the script works well when typing in fast speed
; Note that repeating space no longer works

#NoEnv  ; Recommended for performance and compatibility with future AutoHotkey releases.
; #Warn  ; Enable warnings to assist with detecting common errors.
SendMode Input  ; Recommended for new scripts due to its superior speed and reliability.
SetWorkingDir %A_ScriptDir%  ; Ensures a consistent starting directory.

AnyKeyPressedOtherThanSpace(mode = "P") {
    keys = 1234567890-=qwertyuiop[]\asdfghjkl;'zxcvbnm,./
    Loop, Parse, keys
    {        
        isDown :=  GetKeyState(A_LoopField, mode)
        if(isDown)
            return True
    }   
    return False
}
 
Space Up::
    space_up := true
    Send, {F18}
    return
Space::
    if AnyKeyPressedOtherThanSpace(){
        SendInput, {Blind}{Space}
        Return
    }
    space_up := False
    inputed := False
    input, UserInput, L1 T0.1, {F18}
    if (space_up) {
        Send, {Blind}{Space}
        return
    }else if (StrLen(UserInput) == 1){
        Send, {Space}%UserInput%
        return
    }
    while true{
        input, UserInput, L1, {F18}
        if (space_up) {
            if (!inputed){
                Send, {Blind}{Space}
            }
            break
        }else if (StrLen(UserInput) == 1) {
            inputed := True
            StringLower, UserInput, UserInput
            if (UserInput == "e")
                Send, {Blind}{Up}
            else if (UserInput == "d")
                Send, {Blind}{Down}
            else if (UserInput == "s")
                Send, {Blind}{Left}
            else if (UserInput == "f")
                Send, {Blind}{Right}
            else if (UserInput == "w")
                Send, {Blind}{Home}
            else if (UserInput == "r")
                Send, {Blind}{End}
            else if (UserInput == "c")
                Send, {Blind}{BS}
            else if (UserInput == "v")
                Send, {Blind}{DEL}
            else
                Send, {Blind}%UserInput%
        }
    }
    return