kivyblocks/kivyblocks/markdown.py
2021-01-27 17:39:48 +08:00

158 lines
3.6 KiB
Python

from kivy.properties import StringProperty
from kivy.factory import Factory
from kivy.clock import Clock
from .baseWidget import ScrollWidget, getDataHandler
from .utils import CSize
import re
class Markdown(ScrollWidget):
"""
# Markdown
MArkdown widget using to render a markdown file and show it
description file format
{
"widgettype":"Markdown",
"options":{
"source": the markdown file
other options
}
}
"""
source = StringProperty(None)
def __init__(self, **kw):
ScrollWidget.__init__(self, **kw)
self.bind(source=self.load_text)
if self.source:
Clock.schedule_once(self.load_text, 0.3)
def load_text(self, *args):
print('source fired, hahaha', *args)
self.clear_widgets()
h = getDataHandler(self.source)
h.bind(on_success=self.update)
h.bind(on_error=self.show_error)
h.handle()
def show_error(self, o, e):
print('load_text(), error=',e)
def update(self, o, text):
print('text=',text, type(text))
if not text:
return
for l in text.split('\n'):
l = ''.join([i for i in l if i != '\r'])
self.parse_line(l)
def parse_title(self,txt, level):
w = Factory.Blocks().widgetBuild({
"widgettype":f"Title{level}",
"options":{
"text":txt,
"size_hint_x":None,
"width":self.width,
"size_hint_y":None,
"markup":True,
"wrap":True,
"halign":"left",
"valign":"middle"
}
})
_,h = w.get_wraped_size()
clen = CSize(1)
if h is None or h < clen:
h = clen
w.height = h
print(w,h,w.height)
w.bind(on_ref_press=self.open_new_md)
self.add_widget(w)
def parse_line(self, l):
if l.startswith('###### '):
t = self.mktext_bbtext(l[7:])
return self.parse_title(t,6)
if l.startswith('##### '):
t = self.mktext2bbtext(l[6:])
return self.parse_title(t,5)
if l.startswith('#### '):
t = self.mktext2bbtext(l[5:])
return self.parse_title(t,4)
if l.startswith('### '):
t = self.mktext2bbtext(l[4:])
return self.parse_title(t,3)
if l.startswith('## '):
t = self.mktext2bbtext(l[3:])
return self.parse_title(t,2)
if l.startswith('# '):
t = self.mktext2bbtext(l[2:])
return self.parse_title(t,1)
t = self.mktext2bbtext(l)
w = Factory.Blocks().widgetBuild({
"widgettype":"Text",
"options":{
"text":t,
"wrap":True,
"size_hint_x":None,
"width":self.width,
"markup":True,
"valign":"middle",
"halign":"left"
}
})
_,h = w.get_wraped_size()
clen = CSize(1)
if h is None or h < clen:
h = clen
w.height = h
w.bind(on_ref_press=self.open_new_md)
self.add_widget(w)
def open_new_md(self, o, value):
print(value,'is it a link')
self.source = value
def mktext2bbtext(self,mdtext):
"""
convert markdown text to bbtag text kivy Label Widget recognized
markdown syntax
*XXX* Italic
**XXX** Bold
***XXX*** Bold + Italic
> XXXX reference
>> XXXX reference inside reference
[-*] XXX list
[0-9]*[.] XXX list
*** split line
--- split line
___ split line
[.*](url) link
![.*](url) image
[![.*](url)](url) image link
!v[.*](url) video* plan to extend
!a[.*](url) audio* plan to extend
bb tag syntax
[b]XXX[/b] Bold
[i]XXX[/i] Italic
[sub]XXX[/sub]
"""
mdtext = re.sub('\*\*\*(.*)\*\*\*', \
lambda x: '[b][i]'+x.group(1)+'[/i][/b]', \
mdtext)
mdtext = re.sub('\*\*(.*)\*\*', \
lambda x: '[b]'+x.group(1)+'[/b]', \
mdtext)
mdtext = re.sub('\*(.*)\*', \
lambda x: '[i]'+x.group(1)+'[/i]', \
mdtext)
mdtext = re.sub('([^!]?)\[(.*)\]\((.*)\)', \
lambda x:x.group(1) + '[ref='+x.group(3)+'][color=00ff00]'+ x.group(2)+'[/color][/ref]', \
mdtext)
return mdtext