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# This file is part of the Frescobaldi project, http://www.frescobaldi.org/
#
# Copyright (c) 2012 - 2014 by Wilbert Berendsen
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
# See http://www.gnu.org/licenses/ for more information.
"""
Create a HTML diff view from two text strings.
"""
import re
import difflib
def htmldiff(oldtext, newtext, oldtitle="", newtitle="",
context=True, numlines=3, tabsize=8, wrapcolumn=None):
"""Return a HTML diff from oldtext to newtext.
See also the Python documentation for difflib.HtmlDiff().make_table().
"""
table = difflib.HtmlDiff(tabsize=tabsize, wrapcolumn=wrapcolumn).make_table(
oldtext.splitlines(), newtext.splitlines(),
oldtitle, newtitle, context, numlines)
# overcome a QTextBrowser limitation (no text-align css support)
table = table.replace('<td class="diff_header"', '<td align="right" class="diff_header"')
# make horizontal lines between sections
table = re.sub(r'</tbody>\s*<tbody>', '<tr><td colspan="6"><hr/></td></tr>', table)
legend = _legend.format(
colors = _("Colors:"),
added = _("Added"),
changed = _("Changed"),
deleted = _("Deleted"),
links = _("Links:"),
first_change = _("First Change"),
next_change = _("Next Change"),
top = _("Top"))
return _htmltemplate.format(diff = table, css = _css, legend = legend)
_htmltemplate = """
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html>
<head>
<title></title>
<style type="text/css">{css}</style>
</head>
<body>
{diff}
{legend}
</body>
</html>"""
_css = """
table.diff {
border:medium;
}
.diff_header {
background-color:#e0e0e0;
}
td.diff_header {
text-align:right;
padding-right: 10px;
color: #606060;
}
.diff_next {
background-color:#c0c0c0;
padding-left: 4px;
padding-right: 4px;
}
.diff_add {
background-color:#aaffaa;
}
.diff_chg {
background-color:#ffff77;
}
.diff_sub {
background-color:#ffaaaa;
}
"""
_legend = """<p>
<b>{colors}</b>
<span class="diff_add"> {added} </span>,
<span class="diff_chg"> {changed} </span>,
<span class="diff_sub"> {deleted} </span>
<br />
<b>{links}</b>
f: {first_change},
n: {next_change},
t: {top}
</p>
"""
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