Python3用。テキストファイルに書かれた文字を縦書きっぽく成形し、クリップボードに入れるだけのプログラムです。

tate.py

#encoding: utf-8

import sys
import pyperclip as clip

class Vertical:
    def __init__(self):
        self.size = 0
        self.tex = ""
        self.count = 0
        self.l = []
        self.dic = {"。":"︒", "、":"︑", "？":"︖", "！":"︕", ",":"︐", "：":"︓", "；":"︔","（":"︵","）":"︶","｛":"︷","｝":"︸","「":"﹁","」":"﹂","『":"﹃","』":"﹄","〈":"︿", "〉":"﹀", "【":"︻", "】":"︼", "《":"︽", "》":"︾", "〔":"︹", "〕":"︺", "［":"﹇", "］":"﹈", "―":"︱", "…":"︙", "‥":"︰", "ー":"丨"}

    def HorizonalToVertical(self, text):
        locallist = text
        size = len(text)
        for i in range(size):
            if self.count == 0:
                tmp = locallist[i]
                for j in self.dic:
                    if tmp == j:
                        tmp = self.dic[j]
                        break
                self.l.append(tmp)
            else:
                tmp = locallist[i]
                for j in self.dic:
                    if tmp == j:
                        tmp = self.dic[j]
                        break
                self.l[i] = tmp + self.l[i]

        self.count = self.count + 1

    def AddSpace(self, text, size):

        result = ""

        for i in range(size):
            strsize = len(text)
            if strsize < (size):
                space = ""
                diff = size - strsize
                for j in range(diff):
                    space = space + "　"

                result = text + space

                return result

        return False

    def AddNewLineCode(self):
        size = len(self.l)
        for i in range(size):
            self.l[i] = self.l[i] + "\n"

def GoToVertical(path):
    f = open(path, "r")
    v = Vertical()

    size = 0
    for check in f:
        text = check.replace("\n", "")
        if size < len(text):
            size = len(text)

    f.seek(0)
    for line in f:
        text = line.replace("\n", "")
        test = v.AddSpace(text, size)
        if test != False:
            text = test
        v.HorizonalToVertical(text)

    
    f.close()

    for i in v.l:
        print(i)

    v.AddNewLineCode()
    result = "".join(v.l)
    clip.copy(result) 

def main():
    argvs = sys.argv
    count = len(argvs)
    if count == 1:
        print("Please Text File Path.")
        exit()
    else:
        print("")
        GoToVertical(argvs[1])

if __name__ == '__main__':
    main()