def link(self, text=None, structure=False, title=None, css_class=None,
icon=0, preview=0, **args):
""" Returns an HTML link tag for the file or image.
The 'text' argument is subject to HTML-quoting. To pass a
structure (e.g. an <img /> tag), set the 'structure' keyword
argument to True.
"""
href = self._static_url(icon=icon, preview=preview)
if text is None:
text = html_quote(self.title_or_id())
elif not structure:
text = html_quote(text)
if title is None:
title = getattr(self, 'title', '')
title = html_quote(title)
return self._link(href, text, title, css_class, **args)
def link(self, text='', **args):
""" Return an HTML link tag to the file or image.
Assumes all arguments are properly quoted.
"""
if not text:
text = html_quote(self.title_or_id())
return self._link(self._static_url(), text, **args)
def link(self, text='', **args):
""" Return an HTML link tag to the file or image.
Assumes all arguments are properly quoted.
"""
if not text:
text = html_quote(self.title_or_id())
return self._link(self._static_url(), text, **args)
def testSkipQuote(self):
methods = "html_quote",
a = '\0he>llo'
for method in methods:
html = self.doc_class('<dtml-var a %s>' % method)
expected = html_quote(a)
res = html(a=a)
self.assertEqual(res, expected)
def testSkipQuote(self):
methods = "html_quote",
a = '\0he>llo'
for method in methods:
expected = html_quote(a)
html = self.doc_class('<dtml-var a %s>' % method)
self.assertEqual(html(a=a), expected)
html = self.doc_class('&dtml.%s-a;' % method)
self.assertEqual(html(a=a), expected)
def testSkipQuote(self):
methods = "html_quote",
a = '\0he>llo'
for method in methods:
expected = html_quote(a)
html = self.doc_class('<dtml-var a %s>' % method)
self.assertEqual(html(a=a), expected)
html = self.doc_class('&dtml.%s-a;' % method)
self.assertEqual(html(a=a), expected)
def getImageFor(latexCode, charheightpx):
preamble, postamble = '', ''
width, height = '', ''
imageFile = fileNameFor(latexCode, charheightpx, '.png')
imageUrl = imagesPath + imageFile
width, height = getPngSize(os.path.join(workingDir, imageFile))
src = html_quote(re.match(latexRemoveDelim, latexCode, re.MULTILINE|re.DOTALL).group(2))
src = re.sub(r'\n\n+', '\n', src) # FIXME collapse blank lines or they will
# be interpreted as stx paragraphs -- this is an stx bug since they are
# inside a tag.
return '%s<img alt="%s" class="equation" src="%s" width="%s" height="%s"/>%s' %(preamble,
src,
imageUrl,
width,
height,
postamble)
def manage_test(self, REQUEST):
"""Test an SQL method."""
# Try to render the query template first so that the rendered
# source will be available for the error message in case some
# error occurs...
try:
src = self(REQUEST, src__=1)
except Exception:
src = 'Could not render the query template!'
result = ()
t = v = tb = None
try:
try:
src, result = self(REQUEST, test__=1)
if src.find('\0'):
src = ('\n' + '-' * 60 + '\n').join(src.split('\0'))
if result._searchable_result_columns():
r = custom_default_report(self.id, result)
else:
r = 'This statement returned no results.'
except Exception:
t, v, tb = sys.exc_info()
r = '<strong>Error, <em>%s</em>:</strong> %s' % (t, v)
report = HTML(
'<html>\n'
'<BODY BGCOLOR="#FFFFFF" LINK="#000099" VLINK="#555555">\n'
'<dtml-var manage_tabs>\n<hr>\n%s\n\n'
'<hr><strong>SQL used:</strong><br>\n<pre>\n%s\n</pre>\n<hr>\n'
'</body></html>'
% (r, html_quote(src)))
report = report(*(self, REQUEST), **{self.id: result})
if tb is not None:
self.raise_standardErrorMessage(
None, REQUEST, t, v, tb, None, report)
return report
finally:
tb = None
def manage_test(self, REQUEST):
"""Test an SQL method."""
# Try to render the query template first so that the rendered
# source will be available for the error message in case some
# error occurs...
try:
src = self(REQUEST, src__=1)
except Exception:
src = 'Could not render the query template!'
result = ()
t = v = tb = None
try:
try:
src, result = self(REQUEST, test__=1)
if src.find('\0'):
src = ('\n' + '-' * 60 + '\n').join(src.split('\0'))
if result._searchable_result_columns():
r = custom_default_report(self.id, result)
else:
r = 'This statement returned no results.'
except Exception:
t, v, tb = sys.exc_info()
r = '<strong>Error, <em>%s</em>:</strong> %s' % (t, v)
report = HTML(
'<html>\n'
'<BODY BGCOLOR="#FFFFFF" LINK="#000099" VLINK="#555555">\n'
'<dtml-var manage_tabs>\n<hr>\n%s\n\n'
'<hr><strong>SQL used:</strong><br>\n<pre>\n%s\n</pre>\n<hr>\n'
'</body></html>' % (r, html_quote(src)))
report = report(*(self, REQUEST), **{self.id: result})
if tb is not None:
self.raise_standardErrorMessage(None, REQUEST, t, v, tb, None,
report)
return report
finally:
tb = None
def manage_test(self, REQUEST):
"""Test an SQL method."""
# Try to render the query template first so that the rendered
# source will be available for the error message in case some
# error occurs...
try:
src = self(REQUEST, src__=1)
except:
src = "Could not render the query template!"
result = ()
t = v = tb = None
try:
try:
src, result = self(REQUEST, test__=1)
if find(src, "\0"):
src = join(split(src, "\0"), "\n" + "-" * 60 + "\n")
if result._searchable_result_columns():
r = custom_default_report(self.id, result)
else:
r = "This statement returned no results."
except:
t, v, tb = sys.exc_info()
r = "<strong>Error, <em>%s</em>:</strong> %s" % (t, v)
report = DocumentTemplate.HTML(
"<html>\n"
'<BODY BGCOLOR="#FFFFFF" LINK="#000099" VLINK="#555555">\n'
"<dtml-var manage_tabs>\n<hr>\n%s\n\n"
"<hr><strong>SQL used:</strong><br>\n<pre>\n%s\n</pre>\n<hr>\n"
"</body></html>" % (r, html_quote(src))
)
report = apply(report, (self, REQUEST), {self.id: result})
if tb is not None:
self.raise_standardErrorMessage(None, REQUEST, t, v, tb, None, report)
return report
finally:
tb = None
def replaceInlineLatex(body, charheightpx, alignfudge, resfudge, latexTemplate=None):
from latexWrapper import renderNonexistingImages
renumbered = re.compile(r'[ \t]*\\begin{ *(math|equation|eqnarray) *}')
reunnumbered = re.compile(r'[ \t]*(\\begin{ *((math|equation|eqnarray)\*|table|tabular|displaymath|array|latex) *}|\\\[)')
body = strip(body)
latexCodeList = findLatexCode(body)
newlatexCodeList = []
eqnum = 0
for code in latexCodeList:
if code[0]=='!':
# We need to identify if we're inside a '' block or an example:: block here.
newcode = re.compile('^!', re.MULTILINE).sub('', code)
# change the dollar sign so that the replace below does not hit
# this code again (in the case of the same code appearing twice,
# once escaped, once not)
#newcode = re.compile('\$', re.MULTILINE).sub('$', newcode, 2)
# prevent stx from mangling asterisks
#newcode = re.compile('\*', re.MULTILINE).sub('*', newcode)
# and this will hide \(\), \[\], \begin...\end, including any
# equations that may be hiding inside a \begin{latex}..\end{latex}
newcode = re.compile(r'\\\[', re.MULTILINE).sub('\\![', newcode)
#newcode = re.compile(r'\\', re.MULTILINE).sub('\', newcode)
body = replace(body, code, newcode, 1)
continue
else:
newlatexCodeList.append(code)
oldcode = code
renummatch = renumbered.match(code)
if renummatch:
eqnum = eqnum + 1
code = renumbered.sub('\\\\begin{\\1*}\n\\label{eq%d}' %(eqnum), code, 1)
kind = renummatch.group(1)
code = re.compile('\\\\end{ *%s *}' %(kind)).sub('\\\\end{%s*}' %(kind), code, 1)
code = renumbered.sub('\\\\begin{\\1*}\n\\label{eq%d}' %(eqnum), code, 1)
# FIXME we really shouldn't do this...it will recreate block equations with different numbers.
newlatexCodeList[newlatexCodeList.index(oldcode)] = code
# FIXME This will also replace any escaped code :(
body = replace(body, oldcode, code, 1)
errors = renderNonexistingImages(newlatexCodeList, charheightpx, alignfudge, resfudge,
latexTemplate=latexTemplate)
if not errors:
for code in newlatexCodeList:
labelmatch = re.compile('\\\\label{eq(\\d+)}').search(code, 1)
commentedcode = re.compile('^', re.MULTILINE).sub('!', html_quote(code))
# "--" inside a comment screws up browsers. But in LaTeX math mode "--" and "- -" are equivalent.
commentedcode = re.compile('--', re.MULTILINE).sub('- -', commentedcode)
if labelmatch:
eqnum = labelmatch.group(1)
imageTag = '<a name="eq%s">' %(eqnum) \
+ '<table width="100%"><tr><td align="center" width="95%">' \
+ getImageFor(code, charheightpx) \
+ '</td><td align="right">(%s)</td></tr></table></a>' %(eqnum)
elif reunnumbered.match(code):
imageTag = '<a name="unnumbered">' \
+ '<table width="100%"><tr><td align="center" width="95%">' \
+ getImageFor(code, charheightpx) \
+ '</td><td width="5%" align="right"> </td></tr></table></a>'
else:
imageTag = getImageFor(code, charheightpx)
body = replace(body, code, imageTag, 1)
# We try to match the > and < (or ^/$) from the preceeding and trailing tags,
# so as not to catch the alt="..." from a latex equation
# FIXME this is slow. Use something like perl's m/\G/g to iterate over (n)
for i in range(1,int(eqnum)+1):
body = re.compile(r'((?:>|^)(?:[^<]*\s|))\( *(?:[Ee][Qq]\.)?\s*(%d) *\)([^>]*(?:<|$))' %(i)).sub(r'\1<a href="#eq\2">(\2)</a>\3', body)
else:
body = "<pre>" + body + "</pre>" + errorMessage %(errors)
# Handle escaping of latex
body = re.compile(r'(?<!\\)((?:\\\\)*)\\\$', re.MULTILINE).sub(r'\1$', body)
body = re.compile(r'\\\\', re.MULTILINE).sub(r'\\', body)
return body
def raise_standardErrorMessage(self,
client=None,
REQUEST={},
error_type=None,
error_value=None,
tb=None,
error_tb=None,
error_message='',
tagSearch=re.compile(r'[a-zA-Z]>').search,
error_log_url=''):
try:
if error_type is None: error_type = sys.exc_info()[0]
if error_value is None: error_value = sys.exc_info()[1]
# allow for a few different traceback options
if tb is None and error_tb is None:
tb = sys.exc_info()[2]
if type(tb) is not str and (error_tb is None):
error_tb = pretty_tb(error_type, error_value, tb)
elif type(tb) is str and not error_tb:
error_tb = tb
if hasattr(self, '_v_eek'):
# Stop if there is recursion.
raise error_type, error_value, tb
self._v_eek = 1
if hasattr(error_type, '__name__'):
error_name = error_type.__name__
else:
error_name = 'Unknown'
if not error_message:
try:
s = ustr(error_value)
except:
s = error_value
try:
match = tagSearch(s)
except TypeError:
match = None
if match is not None:
error_message = error_value
if client is None:
client = self
if not REQUEST:
REQUEST = aq_acquire(self, 'REQUEST')
try:
s = aq_acquire(client, 'standard_error_message')
# For backward compatibility, we pass 'error_name' as
# 'error_type' here as historically this has always
# been a string.
kwargs = {
'error_type': error_name,
'error_value': error_value,
'error_tb': error_tb,
'error_traceback': error_tb,
'error_message': xml_escape(str(error_message)),
'error_log_url': error_log_url
}
if getattr(aq_base(s), 'isDocTemp', 0):
v = s(client, REQUEST, **kwargs)
elif callable(s):
v = s(**kwargs)
else:
v = HTML.__call__(s, client, REQUEST, **kwargs)
except:
logger.error('Exception while rendering an error message',
exc_info=True)
try:
strv = repr(error_value) # quotes tainted strings
except:
strv = ('<unprintable %s object>' %
str(type(error_value).__name__))
v = strv + (
(" (Also, the following error occurred while attempting "
"to render the standard error message, please see the "
"event log for full details: %s)") %
(html_quote(sys.exc_info()[1]), ))
# If we've been asked to handle errors, just return the rendered
# exception and let the ZPublisher Exception Hook deal with it.
return error_type, v, tb
finally:
if hasattr(self, '_v_eek'): del self._v_eek
tb = None
def raise_standardErrorMessage(
self, client=None, REQUEST={},
error_type=None, error_value=None, tb=None,
error_tb=None, error_message='',
tagSearch=re.compile(r'[a-zA-Z]>').search,
error_log_url=''):
try:
if error_type is None: error_type =sys.exc_info()[0]
if error_value is None: error_value=sys.exc_info()[1]
# allow for a few different traceback options
if tb is None and error_tb is None:
tb=sys.exc_info()[2]
if type(tb) is not type('') and (error_tb is None):
error_tb = pretty_tb(error_type, error_value, tb)
elif type(tb) is type('') and not error_tb:
error_tb = tb
# turn error_type into a string
if hasattr(error_type, '__name__'):
error_type=error_type.__name__
if hasattr(self, '_v_eek'):
# Stop if there is recursion.
raise error_type, error_value, tb
self._v_eek=1
if str(error_type).lower() in ('redirect',):
raise error_type, error_value, tb
if not error_message:
try:
s = ustr(error_value)
except:
s = error_value
try:
match = tagSearch(s)
except TypeError:
match = None
if match is not None:
error_message=error_value
if client is None: client=self
if not REQUEST: REQUEST=self.aq_acquire('REQUEST')
try:
if hasattr(client, 'standard_error_message'):
s=getattr(client, 'standard_error_message')
else:
client = client.aq_parent
s=getattr(client, 'standard_error_message')
kwargs = {'error_type': error_type,
'error_value': error_value,
'error_tb': error_tb,
'error_traceback': error_tb,
'error_message': error_message,
'error_log_url': error_log_url}
if getattr(aq_base(s),'isDocTemp',0):
v = s(client, REQUEST, **kwargs)
elif callable(s):
v = s(**kwargs)
else:
v = HTML.__call__(s, client, REQUEST, **kwargs)
except:
logger.error(
'Exception while rendering an error message',
exc_info=True
)
try:
strv = repr(error_value) # quotes tainted strings
except:
strv = ('<unprintable %s object>' %
str(type(error_value).__name__))
v = strv + (
(" (Also, the following error occurred while attempting "
"to render the standard error message, please see the "
"event log for full details: %s)")%(
html_quote(sys.exc_info()[1]),
))
raise error_type, v, tb
finally:
if hasattr(self, '_v_eek'): del self._v_eek
tb=None
def raise_standardErrorMessage(
self, client=None, REQUEST={},
error_type=None, error_value=None, tb=None,
error_tb=None, error_message='',
tagSearch=re.compile(r'[a-zA-Z]>').search,
error_log_url=''):
try:
if error_type is None: error_type =sys.exc_info()[0]
if error_value is None: error_value=sys.exc_info()[1]
# allow for a few different traceback options
if tb is None and error_tb is None:
tb=sys.exc_info()[2]
if type(tb) is not type('') and (error_tb is None):
error_tb = pretty_tb(error_type, error_value, tb)
elif type(tb) is type('') and not error_tb:
error_tb = tb
if hasattr(self, '_v_eek'):
# Stop if there is recursion.
raise error_type, error_value, tb
self._v_eek = 1
if hasattr(error_type, '__name__'):
error_name = error_type.__name__
else:
error_name = 'Unknown'
if not error_message:
try:
s = ustr(error_value)
except:
s = error_value
try:
match = tagSearch(s)
except TypeError:
match = None
if match is not None:
error_message=error_value
if client is None:
client = self
if not REQUEST:
REQUEST = aq_acquire(self, 'REQUEST')
try:
s = aq_acquire(client, 'standard_error_message')
# For backward compatibility, we pass 'error_name' as
# 'error_type' here as historically this has always
# been a string.
kwargs = {'error_type': error_name,
'error_value': error_value,
'error_tb': error_tb,
'error_traceback': error_tb,
'error_message': error_message,
'error_log_url': error_log_url}
if getattr(aq_base(s), 'isDocTemp', 0):
v = s(client, REQUEST, **kwargs)
elif callable(s):
v = s(**kwargs)
else:
v = HTML.__call__(s, client, REQUEST, **kwargs)
except:
logger.error(
'Exception while rendering an error message',
exc_info=True
)
try:
strv = repr(error_value) # quotes tainted strings
except:
strv = ('<unprintable %s object>' %
str(type(error_value).__name__))
v = strv + (
(" (Also, the following error occurred while attempting "
"to render the standard error message, please see the "
"event log for full details: %s)")%(
html_quote(sys.exc_info()[1]),
))
# If we've been asked to handle errors, just return the rendered
# exception and let the ZPublisher Exception Hook deal with it.
return error_type, v, tb
finally:
if hasattr(self, '_v_eek'): del self._v_eek
tb = None
def raise_standardErrorMessage(self,
client=None,
REQUEST={},
error_type=None,
error_value=None,
tb=None,
error_tb=None,
error_message='',
tagSearch=re.compile(r'[a-zA-Z]>').search,
error_log_url=''):
try:
if error_type is None: error_type = sys.exc_info()[0]
if error_value is None: error_value = sys.exc_info()[1]
# allow for a few different traceback options
if tb is None and error_tb is None:
tb = sys.exc_info()[2]
if type(tb) is not type('') and (error_tb is None):
error_tb = pretty_tb(error_type, error_value, tb)
elif type(tb) is type('') and not error_tb:
error_tb = tb
# turn error_type into a string
if hasattr(error_type, '__name__'):
error_type = error_type.__name__
if hasattr(self, '_v_eek'):
# Stop if there is recursion.
raise error_type, error_value, tb
self._v_eek = 1
if str(error_type).lower() in ('redirect', ):
raise error_type, error_value, tb
if not error_message:
try:
s = ustr(error_value)
except:
s = error_value
try:
match = tagSearch(s)
except TypeError:
match = None
if match is not None:
error_message = error_value
if client is None: client = self
if not REQUEST: REQUEST = self.aq_acquire('REQUEST')
try:
if hasattr(client, 'standard_error_message'):
s = getattr(client, 'standard_error_message')
else:
client = client.aq_parent
s = getattr(client, 'standard_error_message')
kwargs = {
'error_type': error_type,
'error_value': error_value,
'error_tb': error_tb,
'error_traceback': error_tb,
'error_message': error_message,
'error_log_url': error_log_url
}
if getattr(aq_base(s), 'isDocTemp', 0):
v = s(client, REQUEST, **kwargs)
elif callable(s):
v = s(**kwargs)
else:
v = HTML.__call__(s, client, REQUEST, **kwargs)
except:
logger.error('Exception while rendering an error message',
exc_info=True)
try:
strv = str(error_value)
except:
strv = ('<unprintable %s object>' %
str(type(error_value).__name__))
v = strv + (
(" (Also, the following error occurred while attempting "
"to render the standard error message, please see the "
"event log for full details: %s)") %
(html_quote(sys.exc_info()[1]), ))
raise error_type, v, tb
finally:
if hasattr(self, '_v_eek'): del self._v_eek
tb = None
def render_blocks_(blocks, rendered, md, encoding):
for block in blocks:
append = True
if (isinstance(block, tuple) and
len(block) > 1 and
isinstance(block[0], six.string_types)):
first_char = block[0][0]
if first_char == 'v': # var
t = block[1]
if isinstance(t, six.string_types):
t = md[t]
else:
t = t(md)
skip_html_quote = 0
if not isinstance(t, (six.string_types, six.binary_type)):
# This might be a TaintedString object
untaintmethod = getattr(t, '__untaint__', None)
if untaintmethod is not None:
# Quote it
t = untaintmethod()
skip_html_quote = 1
if not isinstance(t, (six.string_types, six.binary_type)):
t = ustr(t)
if (skip_html_quote == 0 and len(block) == 3):
# html_quote
if isinstance(t, str):
if ('&' in t or '<' in t or '>' in t or '"' in t):
# string includes html problem characters,
# so we cant skip the quoting process
skip_html_quote = 0
else:
skip_html_quote = 1
else:
# never skip the quoting for unicode strings
skip_html_quote = 0
if not skip_html_quote:
t = html_quote(t, encoding=encoding)
block = t
elif first_char == 'i': # if
bs = len(block) - 1 # subtract code
cache = {}
md._push(cache)
try:
append = False
m = bs - 1
icond = 0
while icond < m:
cond = block[icond + 1]
if isinstance(cond, str):
# We have to be careful to handle key errors here
n = cond
try:
cond = md[cond]
except KeyError as t:
if n != t.args[0]:
raise
cond = None
else:
cache[n] = cond
else:
cond = cond(md)
if cond:
block = block[icond + 2]
if block:
render_blocks_(block, rendered, md, encoding)
m = -1
break
icond += 2
if icond == m:
block = block[icond + 1]
if block:
render_blocks_(block, rendered, md, encoding)
finally:
md._pop()
else:
raise ValueError(
'Invalid DTML command code, %s', block[0])
elif not isinstance(block, (six.string_types, six.binary_type)):
block = block(md)
if append and block:
rendered.append(block)
def tag(
self,
preview=0,
icon=0,
height=None,
width=None,
alt=None,
scale=0,
xscale=0,
yscale=0,
border="0",
REQUEST=None,
title=None,
css_class=None,
**args
):
""" Generate an HTML IMG tag for this image, with customization.
Arguments to self.tag() can be any valid attributes of an IMG tag.
'src' will always be an absolute pathname, to prevent redundant
downloading of images. Defaults are applied intelligently for
'height', 'width', and 'alt'. If specified, the 'scale', 'xscale',
and 'yscale' keyword arguments will be used to automatically adjust
the output height and width values of the image tag.
Adopted and adapted from OFS/Image.py
"""
if not self.is_webviewable():
preview = 1
if not self._access_permitted():
preview = 1
if preview and not self.has_preview:
icon = 1
if icon:
url = self._static_url(icon=1)
img_width, img_height = (32, 32)
elif preview:
url = self._static_url(preview=1)
img_width, img_height = self._getImageSize(self.prev_filename)
else:
url = self._static_url()
img_width, img_height = self._getImageSize(self.filename)
height = height or img_height
width = width or img_width
# Auto-scaling support
xdelta = xscale or scale
ydelta = yscale or scale
if xdelta and width != None:
width = str(int(int(width) * xdelta))
if ydelta and height != None:
height = str(int(int(height) * ydelta))
result = '<img src="%s"' % (url,)
if alt is None:
alt = getattr(self, "alt", "")
result = '%s alt="%s"' % (result, html_quote(alt))
if title is None:
title = getattr(self, "title", "")
result = '%s title="%s"' % (result, html_quote(title))
if height:
result = '%s height="%s"' % (result, height)
if width:
result = '%s width="%s"' % (result, width)
# Omitting 'border' attribute (Collector #1557)
if css_class is not None:
result = '%s class="%s"' % (result, css_class)
for key in args.keys():
value = args.get(key)
if value:
result = '%s %s="%s"' % (result, key, value)
return "%s />" % result
def render_blocks_(blocks, rendered, md, encoding):
for block in blocks:
append = True
if (isinstance(block, tuple) and len(block) > 1
and isinstance(block[0], six.string_types)):
first_char = block[0][0]
if first_char == 'v': # var
t = block[1]
if isinstance(t, six.string_types):
t = md[t]
else:
t = t(md)
skip_html_quote = 0
if not isinstance(t, (six.string_types, six.binary_type)):
# This might be a TaintedString object
untaintmethod = getattr(t, '__untaint__', None)
if untaintmethod is not None:
# Quote it
t = untaintmethod()
skip_html_quote = 1
if not isinstance(t, (six.string_types, six.binary_type)):
t = ustr(t)
if (skip_html_quote == 0 and len(block) == 3):
# html_quote
if isinstance(t, str):
if ('&' in t or '<' in t or '>' in t or '"' in t):
# string includes html problem characters,
# so we cant skip the quoting process
skip_html_quote = 0
else:
skip_html_quote = 1
else:
# never skip the quoting for unicode strings
skip_html_quote = 0
if not skip_html_quote:
t = html_quote(t, encoding=encoding)
block = t
elif first_char == 'i': # if
bs = len(block) - 1 # subtract code
cache = {}
md._push(cache)
try:
append = False
m = bs - 1
icond = 0
while icond < m:
cond = block[icond + 1]
if isinstance(cond, str):
# We have to be careful to handle key errors here
n = cond
try:
cond = md[cond]
except KeyError as t:
if n != t.args[0]:
raise
cond = None
else:
cache[n] = cond
else:
cond = cond(md)
if cond:
block = block[icond + 2]
if block:
render_blocks_(block, rendered, md, encoding)
m = -1
break
icond += 2
if icond == m:
block = block[icond + 1]
if block:
render_blocks_(block, rendered, md, encoding)
finally:
md._pop()
else:
raise ValueError('Invalid DTML command code, %s', block[0])
elif not isinstance(block, (six.string_types, six.binary_type)):
block = block(md)
if append and block:
rendered.append(block)