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# -*- coding: utf-8 -*-
import difflib
import re
import BaseHTTPServer
import webbrowser
header = '''<!DOCTYPE html>
<html>
<head>
<title>Text Comparison</title>
<meta name="viewport" content="initial-scale=1.0, width=device-width">
</head>
<body>
'''
footer = '''
</body>
</html>'''
default_css = '''\
<style type="text/css">
body {
overflow-x: hidden;}
#diff {
border: 1px solid #cccccc;
background: none repeat scroll 0 0 #f8f8f8;
font-family: Menlo-Regular,"Courier",monospace;
font-size: 16px;
line-height: 1.4;
white-space: pre-wrap;
word-wrap: break-word;
word-break: break-word;
color: #000;
}
#diff .control {
background-color: #eaf2f5;
color: #999;
}
#diff ins {
background-color: #ddffdd;
display: block;
}
#diff ins mark {
background-color: #aaffaa;
}
#diff del {
background-color: #ffdddd;
display: block;
}
#diff del mark {
background-color: #ffaaaa;
}
</style>
'''
def diff(a, b, n=3, css=True):
if isinstance(a, basestring):
a = a.splitlines()
if isinstance(b, basestring):
b = b.splitlines()
return colorize(list(difflib.unified_diff(a, b, n=n)), css=css)
def colorize(diff, css=True):
css = default_css if css else ""
return header + css + "\n".join(_colorize(diff)) + footer
def _colorize(diff):
if isinstance(diff, basestring):
lines = diff.splitlines()
else:
lines = diff
lines.reverse()
while lines and not lines[-1].startswith("@@"):
lines.pop()
yield '<section id="diff">'
while lines:
line = lines.pop()
if line.startswith("@@"):
yield '<div class="control">%s</div>' % line
elif line.startswith("-"):
if lines:
_next = []
while lines and len(_next) < 2:
_next.append(lines.pop())
if _next[0].startswith("+") and (len(_next) == 1
or _next[1][0] not in ("+", "-")):
aline, bline = _line_diff(line[1:], _next.pop(0)[1:])
yield '<del>-%s</del>' % (aline,)
yield '<ins>+%s</ins>' % (bline,)
if _next:
lines.append(_next.pop())
continue
lines.extend(reversed(_next))
yield '<del>%s</del>' % line
elif line.startswith("+"):
yield '<ins>%s</ins>' % line
else:
yield '<p>%s</p>' % line
yield "</section>"
def _line_diff(a, b):
aline = []
bline = []
for tag, i1, i2, j1, j2 in difflib.SequenceMatcher(a=a, b=b).get_opcodes():
if tag == "equal":
aline.append(a[i1:i2])
bline.append(b[j1:j2])
continue
aline.append('<mark>%s</mark>' % a[i1:i2])
bline.append('<mark>%s</mark>' % b[j1:j2])
return "".join(aline), "".join(bline)
if __name__ == "__main__":
a = sys.argv[1]
b = sys.argv[2]
html = re.sub("<(p|mark)>\s??</(p|mark)>","",diff(a,b))
class MyHandler(BaseHTTPServer.BaseHTTPRequestHandler):
def do_GET(s):
s.send_response(200)
s.send_header("Content-type", "text/html")
s.end_headers()
s.wfile.write(html)
server = BaseHTTPServer.HTTPServer(('', 8888), MyHandler)
webbrowser.open('http://localhost:8888')
server.handle_request()
server.server_close()
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