Snippets
Created by
Adam Labadorf
last modified
Adam Labadorf
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from IPython.display import HTML, Markdown, display
import functools
import io
import json
from matplotlib.figure import Figure
import mimetypes
import os
from subprocess import Popen, PIPE
import urllib.request as ur
class Tag(object):
def __init__(self, tag, *elems, bare=False, **attrs):
self.tag = tag
self.content = elems
# if bare then only return the rendered content and don't wrap in a tag
self.bare = bare
if tag is not None and bare :
raise Exception('tag must be None and attrs is ignored when bare is True')
# special cases, e.g. can't use class as a kwarg
if 'cl' in attrs:
attrs['class'] = attrs['cl']
del attrs['cl']
self.attrs = attrs
def render(self):
inner = []
for elem in self.content:
if isinstance(elem, Tag):
inner.append(elem.render())
elif isinstance(elem, list) or isinstance(elem, tuple):
inner.append(bare(*elem).render())
else: # attempt to format whatever the argument is
try :
inner.append('{}'.format(elem))
except Exception as e:
raise Exception('invalid content element: {} (inner exception: {})', elem,e.msg)
inner = ' '.join(inner)
if self.bare :
tag_str = inner
else :
tag_str = '<{tag}{attrs}>{content}</{tag}>'.format(
tag=self.tag, attrs=''.join(' {}="{}"'.format(*_) for _ in self.attrs.items()), content=inner)
return tag_str
def bytes_to_base64(b) :
b64 = base64.b64encode(b).decode('utf8')
return b64
def tag(tag, **kwargs):
return functools.partial(Tag, tag, **kwargs)
# for combining elements together without a wrapping tag
bare = tag(None,bare=True)
# structural elements
section = tag('section')
h1 = tag('h1')
h2 = tag('h2')
h3 = tag('h3')
h4 = tag('h4')
ul = tag('ul')
ol = tag('ol')
li = tag('li')
lif = tag('li', cl='fragment')
iframe = tag('iframe')
iframef = tag('iframe', cl='fragment')
# text block and formatting tags
span = tag('span')
spanf = tag('span', cl='fragment')
it = tag('span',style='font-style: oblique')
itf = tag('span',style='font-style: oblique', cl='fragment')
bold = tag('span',style='font-weight: bold')
boldf = tag('span',style='font-weight: bold', cl='fragment')
p = tag('p')
pf = tag('p', cl='fragment')
# table tags
table = tag('table')
tablef = tag('table',cl='fragment')
tr = tag('tr')
th = tag('th')
def tagwrap(inner_f,outer_f=bare) :
def wrapped(*elems,**attrs) :
return outer_f(*[inner_f(_,**attrs) for _ in elems])
return wrapped
ths = tagwrap(th,tr)
td = tag('td')
tds = tagwrap(td,tr)
def img(src,mimetype='png',**attrs) :
if isinstance(src, str) :
if src.startswith('http') :
attrs.setdefault('alt',src)
mimetype = mimetypes.guess_type(src)[0]
src = ur.urlopen(src).read()
elif os.path.exists(src) : # assume this is a file, read in as bytes
mimetype = mimetypes.guess_type(src)[0]
src = open(src,'rb').read()
if isinstance(src, Figure): # render as base64 encoded image
from io import BytesIO
figfile = BytesIO()
mimetype = 'png'
src.savefig(figfile, format=mimetype)
figfile.seek(0) # rewind to beginning of file
import base64
src = figfile
attrs.setdefault('src','data:{mimetype};base64,{img}'.format(
mimetype=mimetype
,img=bytes_to_base64(src))
)
return Tag('img',**attrs)
class Reveal(object):
tmpl = '''<!doctype html>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no">
<title>{name}</title>
<link rel="stylesheet" href="css/reveal.css">
<link rel="stylesheet" href="css/theme/black.css">
<!-- Theme used for syntax highlighting of code -->
<link rel="stylesheet" href="lib/css/zenburn.css">
<!-- Printing and PDF exports -->
<script>
var link = document.createElement( 'link' );
link.rel = 'stylesheet';
link.type = 'text/css';
link.href = window.location.search.match( /print-pdf/gi ) ? 'css/print/pdf.css' : 'css/print/paper.css';
document.getElementsByTagName( 'head' )[0].appendChild( link );
</script>
</head>
<body>
<div class="reveal">
<div class="slides">
{content}
</div>
</div>
<script src="lib/js/head.min.js"></script>
<script src="js/reveal.js"></script>
<script>
// More info https://github.com/hakimel/reveal.js#configuration
Reveal.initialize({{
{reveal_args},
// More info https://github.com/hakimel/reveal.js#dependencies
dependencies: [
{{ src: 'plugin/markdown/marked.js' }},
{{ src: 'plugin/markdown/markdown.js' }},
{{ src: 'plugin/zoom-js/zoom.js', async: true }},
{{ src: 'plugin/notes/notes.js', async: true }},
{{ src: 'plugin/highlight/highlight.js', async: true, callback: function() {{ hljs.initHighlightingOnLoad(); }} }}
]
}});
</script>
</body>
</html>'''
def __init__(self, name, *content, debug=False, **kwargs):
self.content = content
# terrible, but whatevs
src = 'https://github.com/hakimel/reveal.js/archive/3.4.1.tar.gz'
panoct_fn = 'reveal.js-{}'.format(src.split('/')[-1])
if not os.path.exists(panoct_fn) :
stdout, stderr = Popen('wget {} -O {}'.format(src,panoct_fn),
shell=True,stdout=PIPE,stderr=PIPE).communicate()
debug and print(stderr)
stdout, stderr = Popen('tar xzf {}'.format(panoct_fn),
shell=True,stdout=PIPE,stderr=PIPE).communicate()
debug and print(stderr)
os.rename(panoct_fn.replace('.tar.gz',''),name)
self.baseurl = name
self.fn = '{name}/{name}.html'.format(name=name)
# kwargs are passed to the Reveal.initialize() JS function
# set some defaults
kwargs.setdefault('history','true')
kwargs.setdefault('slideNumber','c/t')
self.reveal_args = kwargs
def render(self):
reveal_args = ['{}: {}'.format(k,json.dumps(v)) for k,v in self.reveal_args.items()]
reveal_args = ','.join(reveal_args)
return Reveal.tmpl.format(
content=''.join(_.render() for _ in self.content)
,name=self.baseurl
,reveal_args=reveal_args
)
def save(self):
with open(self.fn, 'wt') as fp:
fp.write(self.render())
def link(self):
display(Markdown('[{fn}]({fn})'.format(
baseurl=self.baseurl, fn=self.fn)))
def iframe(self,**attrs):
attrs.setdefault('src',self.fn)
attrs.setdefault('width','100%')
display(HTML(iframe(**attrs).render()))
publish_modes = ('SSH',)
def publish(self,dest,mode='SSH') :
if mode not in publish_modes :
raise Exception('mode must be one of {}'.format(publish_modes))
if mode == 'SSH' :
ssh_p = Popen('scp -r {} {}'.format(self.baseurl,dest)
,stdout=PIPE
,stderr=PIPE
,shell=True
)
stdout, stderr = ssh_p.communicate()
debug and print(stdout)
debug and print(stderr)
|
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