from tkinter import filedialog
import tkinter as tk
import tkinter.scrolledtext as tkst
from tkinter import messagebox
import fileinput
from tkinter import *
from os import *
import os
import time
 
t1 = []
root = None
 
def die():
 root.destroy()
 
def about():
 messagebox.showinfo(title = "当前版本为1.0,欢迎使用",message = "**作者:韩东\n**状态:继续努力ing")
class editor:
 def __init__(self,rt):
  if rt == None:
   self.t = tk.Tk()
  else:
   self.t = tk.Toplevel(rt)
  self.t.title("文本编辑器%d" % (len(t1)+1))
  self.bar = tk.Menu(rt)
 
  self.filem = tk.Menu(self.bar)
  self.filem.add_separator()
  self.filem.add_command(label = "新建",command = self.neweditor)
  self.filem.add_separator()
  self.filem.add_command(label = "打开",command = self.openfile)
  self.filem.add_separator()
  self.filem.add_command(label = "保存",command = self.savefile)
  self.filem.add_separator()
  self.filem.add_command(label = "关闭",command = self.close)
  self.filem.add_separator()
  self.filem.add_command(label = "退出",command = die)
 
  self.editm = tk.Menu(self.bar)
  self.editm.add_separator()
  self.editm.add_command(label = "复制",command = self.copy)
  self.editm.add_separator()
  self.editm.add_command(label = "黏贴",command = self.paste)
  self.editm.add_separator()
  self.editm.add_command(label = "剪切",command = self.cut)
  self.editm.add_separator()
  self.editm.add_command(label = "删除",command = self.delete_text)
  self.editm.add_separator()
  self.editm.add_command(label = "查找",command = self.find_char)
  self.editm.add_separator()
  self.editm.add_command(label = "全选",command = self.select_char_all)
 
 
  self.helpm = tk.Menu(self.bar)
  self.helpm.add_command(label = "关于",command = about)
  self.bar.add_cascade(label = "文件",menu = self.filem)
  self.bar.add_cascade(label = "编辑",menu = self.editm)
  self.bar.add_cascade(label = "帮助",menu = self.helpm)
   
  self.t.config(menu = self.bar)
 
  self.f = tk.Frame(self.t,width = 512)
  self.f.pack(expand =1)
 
  self.st = tkst.ScrolledText(self.t)
  self.st.pack(expand = 1)
 
 def close(self):
  self.t.destroy()
 def openfile(self):
  oname = filedialog.askopenfilename(filetypes = [("打开文件","*.txt")])
  if oname:
   for line in fileinput.input(oname):
    self.st.insert("1.0",line)
   self.t.title(oname)
 
 def savefile(self):
  sname = filedialog.asksaveasfilename(title = "保存好你的宝宝哟",filetypes = [("保存文件","*.txt")])
  if sname:
   ofp = open(sname,"a")
   ofp.write(self.st.get(1.0,tk.END))
   ofp.flush()
   ofp.close()
   self.t.title(sname)
 
 def neweditor(self):
  global root
  t1.append(editor(root))
 def copy(self):
  text = self.st.get(tk.SEL_FIRST,tk.SEL_LAST)
  self.st.clipboard_clear()
  self.st.clipboard_append(text)
 def paste(self):
  try:
   text = self.st.selection_get(selection = "CLIPBOARD")
   self.st.insert(tk.INSERT,text)
  except tk.TclError:
   pass
   
 def cut(self):
  text = self.st.get(tk.SEL_FIRST,tk.SEL_LAST)
  self.st.delete(tk.SEL_FIRST,tk.SEL_LAST)
  self.st.clipboard_clear()
  self.st.clipboard_append(text)
   
 def delete_text(self):
  self.st.delete(tk.SEL_FIRST,tk.SEL_LAST)
 
 def find_char(self):
  target = simpledialog.askstring("简易文本编辑器","寻找字符串")
  if target:
   end = self.st.index(tk.END)
   endindex = end.split(".")
   end_line = int(endindex[0])
   end_column = int(endindex[1])
   pos_line =1
   pos_column=0
   length =len(target)
   while pos_line <= end_line :
    if pos_line == end_line and pos_column +length > end_column:
     break
    elif pos_line < end_line and pos_column + length >100:
     pos_line = pos_line + 1
     pos_column = 100 - (pos_column + length)
     if pos_column > end_column:
      break
    else:
     pos = str(pos_line)+"."+str(pos_column)
     where = self.st.search(target,pos,tk.END)
     if where:
      print(where)
      where1 =where.split(".")
      sele_end_col = str(int(where1[1])+length)
      sele = where1[0] + "."+ sele_end_col
      self.st.tag_add(tk.SEL,where,sele)
      self.st.mark_set(tk.INSERT,sele)
      self.st.see(tk.INSERT)
      #self.st.focus()
     
      again = messagebox.askokcancel(title = "继续查询么")
      if again:
       pos_line = int(where1[0])
       pos_column = int(sele_end_col)
      else:
       aa=messagebox.showinfo(title = "你终于还是放弃了我",message = "你放弃了我--!")
       if aa:
        sys.exit()
         
 
 def select_char_all(self):
  self.st.tag_add(tk.SEL,1.0,tk.END)
  self.st.see(tk.INSERT)
  self.st.focus()
if __name__ == "__main__":
 root = None
 t1.append(editor(root))
 root = t1[0].t
 root.mainloop()