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# encoding: utf-8
"""Trac Fold Out Macro.
This macro allows to hide sections of text until a "show" link is clicked.
Example:
{{{
#!FoldOut
This is the short description.
It goes to the first horizontal rule.
----
This is the long description.
Both, in the summary and the long description, all wiki text can be used.
}}}
"""
import trac.core
import trac.wiki
import trac.wiki.macros
from genshi.builder import tag
import genshi.core
import uuid
import StringIO
ARROW_RIGHT = u'\u25B6'
ARROW_DOWN = u'\u25BC'
class FoldOutMacro(trac.wiki.macros.WikiMacroBase):
def expand_macro(self, formatter, name, args):
summary = [] # Lines with the summary, above the horizontal rule.
body = [] # Lines with the body, below the horizontal rule.
sawRule = False # Flag: Has seen a horizontal rule line.
# Iterate over the lines in args and split at first line with a horizontal
# rule.
for line in args.splitlines():
if line.startswith('----'):
sawRule = True
continue
if sawRule:
body.append(line)
else:
summary.append(line)
# Build HTML with summary and toggle'able body.
hidden_id = uuid.uuid4()
body_html = self.format_wiki(formatter, '\n'.join(body))
hidden = tag.div(genshi.core.Markup(body_html), id=hidden_id, style='display:none;')
toggle_class = uuid.uuid4()
toggle_js = genshi.core.Markup(u'$(\'#%s\').toggle();$(\'.%s\').toggle();return false;') % (hidden_id, toggle_class)
toggle_link = tag.a(tag.span(ARROW_RIGHT + ' more...', class_=toggle_class) + tag.span(ARROW_DOWN + ' less...', class_=toggle_class, style='display:none;'), onclick=toggle_js, href='#')
summary_html = self.format_wiki(formatter, '\n'.join(summary))
return genshi.core.Markup(summary_html) + toggle_link + genshi.core.Markup(hidden)
def format_wiki(self, formatter, wiki_string):
"""Format the given string wiki_string to HTML."""
out = StringIO.StringIO()
trac.wiki.Formatter(self.env, formatter.context).format(wiki_string, out)
return out.getvalue()
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