def composer_preprocessor(intermediate):
"""
Performs the following modifications to the intermediate:
- Promote questions token to top level of the ast
- Converts images to a base64 encoded string to appear directly in the HTML source
- Add text tags around the solution if they are not already present
:param intermediate: An intermediate parse object
:return: A modified intermediate
"""
def fix_solutions(token):
if not filters.has_name(token) and token.definition[0].startswith('<text>'):
token.definition = ['<text>'] + token.definition + ['</text>']
return token
def escape_html(token):
for i in range(len(token.definition)):
if not filters.has_name(token.definition[i]):
token.definition[i] = token.definition[i].replace('(', '(').replace(')', ')')
return token
intermediate.ast = filters.promote(intermediate.ast, 'questions')
intermediate.ast = filters.img64(intermediate.ast)
intermediate.ast = filters.apply_function(intermediate.ast, fix_solutions, 'solution')
intermediate.ast = filters.apply_function(intermediate.ast, escape_html, 'prompt')
return intermediate
def parser_postprocessor(intermediate):
"""
Because LaTeX has no defined Prompt the first string, equations, and images found in a question are put under a
prompt Token.
:param intermediate: An intermediate parse object
:return: A modified intermediate
"""
def def_prompt(token):
try:
definition = token.definition[0].definition
title, prompt = definition.pop(0), []
while len(definition) > 0 and (
not hasattr(definition[0], "name")
or filters.has_name(definition[0], ["$", "img", "verbatim", "emphasis"])
):
prompt.append(definition.pop(0))
definition.insert(0, util.Map({"name": "prompt", "definition": prompt}))
definition.insert(0, title)
return token
except AttributeError:
raise (
parser_composer.FormatError("Malformed question token definition:" + parser_composer.str_token(token))
)
# Run inner function recursively on the ast
filters.apply_function(intermediate.ast, def_prompt, "question", partial=False)
return intermediate
def parser_postprocessor(intermediate):
"""
Because LaTeX has no defined Prompt the first string, equations, and images found in a question are put under a
prompt Token.
:param intermediate: An intermediate parse object
:return: A modified intermediate
"""
def def_prompt(token):
try:
definition = token.definition[0].definition
title, prompt = definition.pop(0), []
while len(definition) > 0 and (not hasattr(definition[0], 'name')
or definition[0].name
in ['$', 'img', 'verbatim']):
prompt.append(definition.pop(0))
definition.insert(
0, util.Map({
'name': 'prompt',
'definition': prompt
}))
definition.insert(0, title)
return token
except AttributeError:
raise (parser_composer.FormatError(
'Malformed question token definition:' + str(token)))
# Run inner function recursively on the ast
filters.apply_function(intermediate.ast,
def_prompt,
'question',
partial=False)
return intermediate
def composer_preprocessor(intermediate):
"""
Performs the following modifications to the intermediate:
- Promote questions token to top level of the ast
- Converts images to a base64 encoded string to appear directly in the HTML source
- Add text tags around the solution if they are not already present
:param intermediate: An intermediate parse object
:return: A modified intermediate
"""
def fix_solutions(token):
if not filters.has_name(token) and token.definition[0].startswith(
'<text>'):
token.definition = ['<text>'] + token.definition + ['</text>']
return token
def escape_html(token):
for i in range(len(token.definition)):
if not filters.has_name(token.definition[i]):
token.definition[i] = token.definition[i].replace(
'(', '(').replace(')', ')')
return token
intermediate.ast = filters.promote(intermediate.ast, 'questions')
intermediate.ast = filters.img64(intermediate.ast)
intermediate.ast = filters.apply_function(intermediate.ast, fix_solutions,
'solution')
intermediate.ast = filters.apply_function(intermediate.ast, escape_html,
'prompt')
return intermediate
def parser_postprocessor(intermediate):
"""
Because LaTeX has no defined Prompt the first string, equations, and images found in a question are put under a
prompt Token.
:param intermediate: An intermediate parse object
:return: A modified intermediate
"""
def def_prompt(token):
try:
definition = token.definition[0].definition
title, prompt = definition.pop(0), []
while len(definition) > 0 and (not hasattr(definition[0], 'name') or definition[0].name in ['$', 'img', 'verbatim']):
prompt.append(definition.pop(0))
definition.insert(0, util.Map({'name': 'prompt', 'definition': prompt}))
definition.insert(0, title)
return token
except AttributeError:
raise(parser_composer.FormatError('Malformed question token definition:' + str(token)))
# Run inner function recursively on the ast
filters.apply_function(intermediate.ast, def_prompt, 'question', partial=False)
return intermediate
