converted regexp to lxml
This commit is contained in:
Alexander Kryklia
@@ -6,6 +6,7 @@ understand functional dependencies.
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import json
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import logging
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from lxml import etree
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from lxml import html
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import xmltodict
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import re
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@@ -82,104 +83,49 @@ class GraphicalSliderToolModule(XModule):
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html_string with control tags replaced by proper divs
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(<slider var="a"/> -> <div class="....slider" > </div>)
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"""
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#substitute plot
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xml = html.fromstring(html_string)
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#substitute plot, if presented
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plot_div = '<div class="{element_class}_plot" id="{element_id}_plot" \
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style="{style}"></div>'
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# extract css style from plot
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plot_def = re.search(r'<plot[^<>]*/>', html_string)
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if plot_def:
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plot_def = plot_def.group()
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style = re.search(r'(?=.*style\=[\"\'](.*)[\"\'])', plot_def,
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flags=re.UNICODE | re.DOTALL)
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if style:
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style = style.groups()[0]
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else: # no style parameter
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style = ''
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replacement = plot_div.format(element_class=self.html_class,
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element_id=self.html_id,
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style=style)
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html_string = re.sub(r'<plot[^<>]*/>', replacement, html_string,
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flags=re.UNICODE)
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# get variables
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if json.loads(self.configuration_json)['root'].get('parameters'):
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variables = json.loads(self.configuration_json)['root']['parameters']['param']
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if type(variables) == dict:
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variables = [variables]
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variables = [x['@var'] for x in variables]
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else:
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return html_string
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plot_el = xml.xpath('//plot')
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if plot_el:
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plot_el = plot_el[0]
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plot_el.getparent().replace(plot_el, html.fromstring(
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plot_div.format(element_class=self.html_class,
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element_id=self.html_id,
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style=plot_el.get('style', ""))))
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#substitute sliders
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slider_div = '<div class="{element_class}_slider" \
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id="{element_id}_slider_{var}" \
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data-var="{var}" style="{style}">\
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</div>'
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for var in variables:
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# find <slider var='var' ... >
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instances = re.findall(r'<slider\s+(?=[^<>]*var\=[\"\']' + var + '[\"\'])' \
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+ r'[^<>]*/>', html_string, flags=re.UNICODE | re.DOTALL)
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if instances: # if presented, only one slider per var
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slider_def = instances[0] # get <slider var='var' ... > string
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# extract var for proper style extraction further
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var_substring = re.search(r'(var\=[\"\']' + var + r'[\"\'])',
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slider_def).group()
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slider_def = slider_def.replace(var_substring, '')
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# get style
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style = re.search(r'(?=[^<>]*style\=[\"\'](.*)[\"\'])', slider_def,
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flags=re.UNICODE | re.DOTALL)
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if style:
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style = style.groups()[0]
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else: # no style parameter
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style = ''
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# substitute parameters to slider div
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replacement = slider_div.format(element_class=self.html_class,
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slider_els = xml.xpath('//slider')
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for slider_el in slider_els:
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slider_el.getparent().replace(slider_el, html.fromstring(
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slider_div.format(element_class=self.html_class,
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element_id=self.html_id,
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var=var, style=style)
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# subsitute <slider var='var' ... > in html_srting to proper
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# html div element
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html_string = re.sub(r'<slider\s+(?=[^<>]*var\=[\"\'](' + \
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var + ')[\"\'])' + r'[^<>]*/>',
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replacement, html_string, flags=re.UNICODE | re.DOTALL)
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var=slider_el.get('var', ""),
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style=slider_el.get('style', ""))))
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# substitute inputs if we have them
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input_el = '<input class="{element_class}_input" \
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# substitute inputs aka textboxes
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input_div = '<input class="{element_class}_input" \
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id="{element_id}_input_{var}_{input_index}" \
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data-var="{var}" style="{style}" \
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data-el_readonly="{readonly}"/>'
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input_els = xml.xpath('//textbox')
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for input_index, input_el in enumerate(input_els):
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input_el.getparent().replace(input_el, html.fromstring(
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input_div.format(element_class=self.html_class,
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element_id=self.html_id,
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var=input_el.get('var', ""),
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readonly=input_el.get('readonly', ''),
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style=input_el.get('style', ""),
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input_index=input_index)))
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for var in variables:
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input_index = 0 # make multiple inputs for same variable have
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# different id
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instances = re.findall(r'<textbox\s+(?=[^<>]*var\=[\"\']' + var + '[\"\'])' \
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+ r'[^<>]*/>', html_string, flags=re.UNICODE | re.DOTALL)
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for input_def in instances: # for multiple inputs per var
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input_index += 1
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# extract var and readonly before style!
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var_substring = re.search(r'(var\=[\"\']' + var + r'[\"\'])',
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input_def).group()
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input_def = input_def.replace(var_substring, '')
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readonly = re.search(r'(?=[^<>]*(readonly\=[\"\'](\w+)[\"\']))',
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input_def, flags=re.UNICODE | re.DOTALL)
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if readonly:
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input_def = input_def.replace(readonly.groups()[0], '')
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readonly = readonly.groups()[1]
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else:
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readonly = ''
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style = re.search(r'(?=[^<>]*style\=[\"\'](.*)[\"\'])', input_def,
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flags=re.UNICODE | re.DOTALL)
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if style:
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style = style.groups()[0]
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else:
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style = ''
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replacement = input_el.format(element_class=self.html_class,
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element_id=self.html_id,
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var=var, readonly=readonly, style=style,
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input_index=input_index)
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html_string = re.sub(r'<textbox\s+(?=[^<>]*var\=[\"\'](' + \
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var + ')[\"\'])' + r'[^<>]*/>',
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replacement, html_string, count=1, flags=re.UNICODE | re.DOTALL)
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return html_string
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return html.tostring(xml)
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def build_configuration_json(self):
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"""Creates json element from xml element (with aim to transfer later
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