git.sesse.net Git - xml-template/blob - python/xmltemplate.py

   1 #! /usr/bin/python
   2 import re
   3 import xml.dom.minidom
   4
   5 def process_file(filename, obj, clean = True):
   6         doc = xml.dom.minidom.parse(filename)
   7         process(doc, obj, clean)
   8         return doc
   9
  10 def process(node, obj, clean = True):
  11         if isinstance(obj, str):                        # overwrite
  12                 while not node.firstChild is None:
  13                         node.removeChild(node.firstChild)
  14                 doc = _get_document_element(node)
  15                 node.appendChild(doc.createTextNode(obj))
  16         elif isinstance(obj, xml.dom.Node):             # overwrite
  17                 while not node.firstChild is None:
  18                         node.removeChild(node.firstChild)
  19
  20                 if isinstance(obj, xml.dom.minidom.Document):
  21                         obj = obj.documentElement
  22
  23                 newobj = obj.cloneNode(True)
  24                 node.appendChild(newobj)
  25
  26                 process(newobj, {}, clean)
  27         elif isinstance(obj, dict):                     # substitute
  28                 for child in node.childNodes:
  29                         processed = False
  30
  31                         if child.nodeType == xml.dom.Node.ELEMENT_NODE:
  32                                 id = None
  33
  34                                 attrs = child.attributes
  35                                 if not attrs is None:
  36                                         for i in range(attrs.length):
  37                                                 attr = attrs.item(0)
  38                                                 if attr.namespaceURI == "http://template.sesse.net/" or attr.name == "id":
  39                                                         id = attr.value
  40                                                         if clean:
  41                                                                 child.removeAttribute(attr.name)
  42
  43                                 # check all substitutions to see if we found anything
  44                                 # appropriate
  45                                 for key in obj.keys():
  46                                         if key.startswith(child.tagName + "/"):
  47                                                 child.setAttribute(key.split("/")[1], obj[key])
  48                                         elif (not id is None) and key.startswith("#" + id + "/"):
  49                                                 child.setAttribute(key.split("/")[1], obj[key])
  50
  51                                         if not processed:
  52                                                 if key == child.localName or ((not id is None) and key == "#" + id):
  53                                                         process(child, obj[key], clean)
  54                                                         processed = True
  55
  56                         if not processed:
  57                                 process(child, obj, clean)
  58         elif isinstance(obj, list):                     # repeat
  59                 doc = _get_document_element(node)
  60                 frag = doc.createElement("temporary-fragment")     # ugh
  61
  62                 while not node.firstChild is None:
  63                         child = node.firstChild
  64                         node.removeChild(child)
  65                         frag.appendChild(child)
  66
  67                 for instance in obj:
  68                         newnode = frag.cloneNode(True)
  69                         node.appendChild(newnode)
  70                         process(newnode, instance, clean)
  71                         if clean:
  72                                 _clean(newnode)
  73
  74                 # remove all the <fragment> tags
  75
  76                 children_to_remove = []
  77                 for child in node.childNodes:
  78                         if isinstance(child, xml.dom.minidom.Element) and child.tagName == 'temporary-fragment':
  79                                 while not child.firstChild is None:
  80                                         child2 = child.firstChild
  81                                         child.removeChild(child2)
  82                                         node.appendChild(child2)
  83                                 children_to_remove.append(child)
  84
  85                 for child in children_to_remove:
  86                         node.removeChild(child)
  87
  88         if clean:
  89                 _clean(node)
  90
  91 def alternate(tag, array, *elems):
  92         i = 0
  93         for ref in array:
  94                 ref[tag] = elems[i % len(elems)]
  95                 i = i + 1
  96
  97         return array
  98
  99 def _clean(node):
 100         if node.nodeType == xml.dom.Node.ELEMENT_NODE and node.namespaceURI == "http://template.sesse.net/":
 101                 # as this is a dummy node, we want to remove it and move everything further up
 102                 # after we've done any required replacements
 103                 doc = _get_document_element(node)
 104                 parent = node.parentNode
 105
 106                 while not node.firstChild is None:
 107                         child = node.firstChild
 108                         node.removeChild(child)
 109                         parent.insertBefore(child, node)
 110
 111                 parent.removeChild(node)
 112
 113 # ugh
 114 def _get_document_element(node):
 115         if node.parentNode is None:
 116                 return node
 117         else:
 118                 return _get_document_element(node.parentNode)