1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/examples/Common/Questionnaire/__init__.py Fri Jan 21 13:44:47 2005 +0000
1.3 @@ -0,0 +1,128 @@
1.4 +#!/usr/bin/env python
1.5 +
1.6 +"A WebStack questionnaire application."
1.7 +
1.8 +import WebStack.Generic
1.9 +import XSLForms.Fields
1.10 +import XSLForms.Output
1.11 +import XSLOutput
1.12 +import libxml2dom
1.13 +import os
1.14 +
1.15 +# NOTE: Move these functions into a common utility library.
1.16 +
1.17 +def add_elements(positions, element_name, element_parent_name=None):
1.18 + if not positions:
1.19 + return
1.20 + for position in positions:
1.21 + if element_parent_name:
1.22 + parent_elements = position.xpath(element_parent_name)
1.23 + if not parent_elements:
1.24 + parent_element = position.ownerDocument.createElementNS(None, element_parent_name)
1.25 + position.appendChild(parent_element)
1.26 + else:
1.27 + parent_element = parent_elements[0]
1.28 + else:
1.29 + parent_element = position
1.30 + parent_element.appendChild(position.ownerDocument.createElementNS(None, element_name))
1.31 +
1.32 +def remove_elements(positions):
1.33 + if not positions:
1.34 + return
1.35 + for position in positions:
1.36 + position.parentNode.removeChild(position)
1.37 +
1.38 +# NOTE: This is so much like ConfiguratorResource that some common parts could
1.39 +# NOTE: be extracted.
1.40 +
1.41 +class QuestionnaireEditorResource:
1.42 +
1.43 + "A resource providing a questionnaire editor."
1.44 +
1.45 + resource_dir = os.path.join(os.path.split(__file__)[0], "Resources")
1.46 + encoding = "utf-8"
1.47 +
1.48 + def respond(self, trans):
1.49 +
1.50 + # Produce stylesheet.
1.51 +
1.52 + if trans.get_path_info().split("/")[-1] == "styles.css":
1.53 + trans.set_content_type(WebStack.Generic.ContentType("text/css", self.encoding))
1.54 + out = trans.get_response_stream()
1.55 + f = open(os.path.join(self.resource_dir, "styles.css"), "rb")
1.56 + out.write(f.read())
1.57 + f.close()
1.58 + raise WebStack.Generic.EndOfResponse
1.59 +
1.60 + global XSLForms # NOTE: Strangely required to avoid UnboundLocalError!
1.61 + method = trans.get_request_method()
1.62 +
1.63 + # Only obtain field information according to the stated method.
1.64 +
1.65 + if method == "GET":
1.66 + fields = XSLForms.Fields.Fields(encoding="iso-8859-1", values_are_lists=1)
1.67 + parameters = trans.get_fields_from_path()
1.68 + documents = fields.make_documents(parameters.items())
1.69 + elif method == "POST":
1.70 + fields = XSLForms.Fields.Fields(encoding=self.encoding, values_are_lists=1)
1.71 + parameters = trans.get_fields_from_body(self.encoding)
1.72 + documents = fields.make_documents(parameters.items())
1.73 + else:
1.74 + trans.set_response_code(405)
1.75 + raise WebStack.Generic.EndOfResponse
1.76 +
1.77 + # Ensure the presence of a document.
1.78 +
1.79 + if documents.has_key("questionnaire"):
1.80 + questionnaire = documents["questionnaire"]
1.81 + else:
1.82 + questionnaire = fields.new_instance("questionnaire")
1.83 +
1.84 + # Add and remove elements according to the selectors found.
1.85 +
1.86 + selectors = fields.get_selectors(parameters.items(), documents)
1.87 + remove_elements(selectors.get("remove-question"))
1.88 + add_elements(selectors.get("add-choice"), "choice")
1.89 + remove_elements(selectors.get("remove-choice"))
1.90 +
1.91 + # Add questions using the normal request parameter.
1.92 +
1.93 + if parameters.has_key("add-question"):
1.94 + new_question = questionnaire.ownerDocument.createElementNS(None, "question")
1.95 + questionnaire.xpath("questionnaire")[0].appendChild(new_question)
1.96 +
1.97 + # Send a response according to certain parameters.
1.98 + # When exported, an XML version of the data is returned.
1.99 +
1.100 + if parameters.has_key("export"):
1.101 + trans.set_content_type(WebStack.Generic.ContentType("text/xml", self.encoding))
1.102 + libxml2dom.toStream(questionnaire, trans.get_response_stream(), trans.get_response_stream_encoding())
1.103 +
1.104 + # When not exported, the data is transformed to produce a normal Web
1.105 + # page.
1.106 +
1.107 + else:
1.108 +
1.109 + # Start the response.
1.110 +
1.111 + trans.set_content_type(WebStack.Generic.ContentType("text/html", self.encoding))
1.112 +
1.113 + # Ensure that an output stylesheet exists.
1.114 +
1.115 + trans_xsl = os.path.join(self.resource_dir, "question_output.xsl")
1.116 + template_xml = os.path.join(self.resource_dir, "question_template.xhtml")
1.117 +
1.118 + if not os.path.exists(trans_xsl) or \
1.119 + os.path.getmtime(trans_xsl) < os.path.getmtime(template_xml):
1.120 +
1.121 + import XSLForms.Prepare
1.122 + template_xml = os.path.join(self.resource_dir, "question_template.xhtml")
1.123 + XSLForms.Prepare.make_stylesheet(template_xml, trans_xsl)
1.124 +
1.125 + # Complete the response.
1.126 +
1.127 + proc = XSLOutput.Processor([trans_xsl])
1.128 + proc.send_output(trans.get_response_stream(), trans.get_response_stream_encoding(),
1.129 + questionnaire)
1.130 +
1.131 +# vim: tabstop=4 expandtab shiftwidth=4