python实现markdown编辑器-5

前言

开始

代码片

因为前面示例里的代码片示例效果不明显，所以我换了一个

# 1号标题
## 2号标题
### 3号标题
#### 4号标题
##### 5号标题
###### 6号标题
- 无序列表第一种
* 无序列表第二种
+ 无序列表第三种
1. test
2. test
3. test
- [ ] unchecked
- [x] checked
` ` `
import this
` ` `

单行代码片和字体格式待会一起讲
多行代码片，思路就是弄一个disable的Text，在里面插入代码

from tkinter.filedialog import askopenfilename as aof,asksaveasfilename as asf
from tkinter.messagebox import askyesno as askyn
import tkinter as tk
fontname = ...
writer = tk.Tk()
display = tk.Tk()
widgets = []
text = tk.Text(writer)
text.grid(row=0,column=0)
cont = ''
def read_md(file):
 	with open(file) as f:
 			return f.read()
def write_md(file,cont):
 	with open(file,'w') as f:
 		f.write(cont)
def clear():
	for i in widgets:
		i.grid_forget()
def render_md():
	display.update()
	clear()
	l = 0
	code = False
	buf = ''
	for i in cont.split('\n'):
		if(code and i != '```'):
			buf += i + '\n'
			continue
		if(i.startswith('# ')):
			lb = tk.Label(display,text=i[2:],font=(fontname,40,'bold'))
		elif(i.startswith('## ')):
			lb = tk.Label(display,text=i[3:],font=(fontname,35,'bold'))
		elif(i.startswith('### ')):
			lb = tk.Label(display,text=i[4:],font=(fontname,30,'bold'))
		elif(i.startswith('#### ')):
			lb = tk.Label(display,text=i[5:],font=(fontname,25,'bold'))
		elif(i.startswith('##### ')):
			lb = tk.Label(display,text=i[6:],font=(fontname,20,'bold'))
		elif(i.startswith('###### ')):
			lb = tk.Label(display,text=i[7:],font=(fontname,15,'bold'))
		elif(i.startswith('- [ ] ')):
			lb = tk.Checkbutton(display,text=i[6:],state=tk.DISABLED)
		elif(i.startswith('- [x] ')):
			lb = tk.Checkbutton(display,text=i[6:],state=tk.DISABLED)
			lb.select()
		elif(i.startswith('- ') or i.startswith('* ') or i.startswith('+ ')):
			i = '● ' + i[2:]
			lb = tk.Label(display,text=i,font=(fontname,15,''))
		elif(i == '```'):
			if(code):
				lb = tk.Text(display)
				lb.insert(0.0,buf)
				h = float(lb.index(tk.END)) - 2
				lb.config(height=h)
				buf = ''
				code = False
			else:
				code = True
				continue
		else:
			lb = tk.Label(display,text=i,font=(fontname,15,''))
		lb.grid(row=l,column=0,sticky='w')
		widgets.append(lb)
		l += 1
def update_writer():
	global cont
	writer.update()
	cont = text.get(0.0,tk.END)
def main():
	global cont
	writer.title('writer')
	display.title('displayer')
	file = aof(title='open a markdown file')
	if(file):
		cont = read_md(file)
	text.insert(0.0,cont)
	while(1):
		try:
			update_writer()
			render_md()
		except:

			try:
				writer.destroy()
			except:
				pass
			try:
				display.destroy()
			except:
				pass
			tk.Tk().withdraw()
			if(file):
				write_md(file,cont)
			else:
				while(1):
					file = asf(title='save as ...')
					if(not file):
						if(not askyn('Do you want to keep this new document?','Do you want to keep this new document?')):
							exit()
					write_md(file)
if(__name__ == '__main__'):
	main()

效果：