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htmlize.py
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htmlize.py
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#-------------------------------------------------------------
# HTML generation
#-------------------------------------------------------------
import os
from parameters import *
from ast import *
from utils import *
#-------------------- types and utilities ----------------------
class Tag:
def __init__(self, tag, idx, start=-1):
self.tag = tag
self.idx = idx
self.start = start
def __repr__(self):
return "tag:" + str(self.tag) + ":" + str(self.idx)
# escape for HTML
def escape(s):
s = s.replace('"', '"')
s = s.replace("'", ''')
s = s.replace("<", '<')
s = s.replace(">", '>')
return s
uid_count = -1
uid_hash = {}
def clear_uid():
global uid_count, uid_hash
uid_count = -1
uid_hash = {}
def uid(node):
if node in uid_hash:
return uid_hash[node]
global uid_count
uid_count += 1
uid_hash[node] = str(uid_count)
return str(uid_count)
def html_header():
install_path = get_install_path()
js_filename = ''.join([install_path, 'nav.js'])
js_file = open(js_filename, 'r')
js_text = js_file.read()
js_file.close()
css_filename = ''.join([install_path, 'diff.css'])
css_file = open(css_filename, 'r')
css_text = css_file.read()
css_file.close()
out = []
out.append('<html>\n')
out.append('<head>\n')
out.append('<META http-equiv="Content-Type" content="text/html; charset=utf-8">\n')
out.append('<style>\n')
out.append(css_text)
out.append('\n</style>\n')
out.append('<script type="text/javascript">\n')
out.append(js_text)
out.append('\n</script>\n')
out.append('</head>\n')
out.append('<body>\n')
return ''.join(out)
def html_footer():
out = []
out.append('</body>\n')
out.append('</html>\n')
return ''.join(out)
def write_html(text, side):
out = []
out.append('<div id="' + side + '" class="src">')
out.append('<pre>')
if side == 'left':
out.append('<a id="leftstart" tid="rightstart"></a>')
else:
out.append('<a id="rightstart" tid="leftstart"></a>')
out.append(text)
out.append('</pre>')
out.append('</div>')
return ''.join(out)
def htmlize(changes, file1, file2, text1, text2):
tags1 = change_tags(changes, 'left')
tags2 = change_tags(changes, 'right')
tagged_text1 = apply_tags(text1, tags1)
tagged_text2 = apply_tags(text2, tags2)
outname = base_name(file1) + '-' + base_name(file2) + '.html'
outfile = open(outname, 'w')
outfile.write(html_header())
outfile.write(write_html(tagged_text1, 'left'))
outfile.write(write_html(tagged_text2, 'right'))
outfile.write(html_footer())
outfile.close()
# put the tags generated by change_tags into the text and create HTML
def apply_tags(s, tags):
tags = sorted(tags, key = lambda t: (t.idx, -t.start))
curr = 0
out = []
for t in tags:
while curr < t.idx and curr < len(s):
out.append(escape(s[curr]))
curr += 1
out.append(t.tag)
while curr < len(s):
out.append(escape(s[curr]))
curr += 1
return ''.join(out)
#--------------------- tag generation functions ----------------------
def change_tags(changes, side):
tags = []
for c in changes:
key = c.orig if side == 'left' else c.cur
if hasattr(key, 'lineno'):
start = node_start(key)
end = node_end(key)
if c.orig != None and c.cur != None:
# <a ...> for change and move
tags.append(Tag(link_start(c, side), start))
tags.append(Tag("</a>", end, start))
else:
# <span ...> for deletion and insertion
tags.append(Tag(span_start(c), start))
tags.append(Tag('</span>', end, start))
return tags
def change_class(change):
if (change.cur == None):
return 'd'
elif (change.orig == None):
return 'i'
elif (change.cost > 0):
return 'c'
else:
return 'u'
def span_start(change):
return '<span class=' + qs(change_class(change)) + '>'
def link_start(change, side):
cls = change_class(change)
if side == 'left':
me, other = change.orig, change.cur
else:
me, other = change.cur, change.orig
return ('<a id=' + qs(uid(me)) +
' tid=' + qs(uid(other)) +
' class=' + qs(cls) +
'>')
def qs(s):
return "'" + s + "'"