python实现markdown编辑器-8

前言

开始

分割线

# 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
` ` `
test
: test1
: test2
$$\sin x$$
----

就是生成一个横线的图片，放图片在上面就行了

from tkinter.filedialog import askopenfilename as aof,asksaveasfilename as asf
from tkinter.messagebox import askyesno as askyn
from PIL import Image,ImageDraw,ImageTk
from tkinter import ttk
import tkinter as tk
import requests
import io
fontname = ...
display = tk.Tk()
writer = tk.Toplevel()
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 get_KaTeX_io(katex):
	resp = requests.get('https://latex.codecogs.com/png.image?\dpi{110} ' + katex)
	return io.BytesIO(resp.content)
def get_KaTeX(katex):
	img_io = get_KaTeX_io(katex)
	img = Image.open(img_io)
	return ImageTk.PhotoImage(img)
def get_spliter():
	w = max(1,display.winfo_width() - 6)
	img = Image.new('RGB',(w,1),(221,221,221))
	return ImageTk.PhotoImage(img)
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.startswith(': ')):
			lb = tk.Label(display,text='\t'+i[2:])
		elif(i.startswith('$$') and i.endswith('$$') and i not in ('$$','$$$')):
			imgTk = get_KaTeX(i[2:-2])
			lb = tk.Label(display,image=imgTk)
			lb.image = imgTk
			lb.grid(row=l,column=0)
			l += 1
			continue
		elif(set(i) in ({
     '-'},{
     '*'}) and len(i) >= 3):
			imgTk = get_spliter()
			lb = tk.Label(display,image=imgTk)
			lb.image = imgTk
		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
			if(file):
				write_md(file,cont)
			else:
				tk.Tk().withdraw()
				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()

这一行代码中的- 6 是我试出来的：

w = max(1,display.winfo_width() - 6)

效果：

>> 《python实现markdown编辑器-9》