Dome/Namespaces.py

   1 from xml.dom import XMLNS_NAMESPACE, XML_NAMESPACE
   2 from constants import DOME_NS
   3
   4 import rox
   5 from rox import g
   6
   7 fixed_ns = {'xml': XML_NAMESPACE, 'xmlns': XMLNS_NAMESPACE,
   8             'dome': DOME_NS}
   9
  10 common_ns = {'http://www.w3.org/1999/xhtml': 'xhtml',
  11              'http://www.w3.org/1999/02/22-rdf-syntax-ns#': 'rdf',
  12              'http://xmlns.4suite.org/ext': 'ft',
  13              'http://www.w3.org/1999/XMLSchema': 'xsd',
  14              'http://www.w3.org/1999/XMLSchema-instance': 'xsi',
  15              'http://schemas.xmlsoap.org/soap/envelope/': 'env'}
  16
  17 class Namespaces(g.GenericTreeModel):
  18         def __init__(self):
  19                 g.GenericTreeModel.__init__(self)
  20                 self.uri = dict(fixed_ns)
  21                 self.update_list()
  22
  23         def update_list(self):
  24                 self.list = self.uri.keys()
  25                 self.list.sort()
  26                 pre = self.prefix = {}
  27                 for p, u in self.uri.iteritems():
  28                         pre[u] = p
  29
  30         def on_get_n_columns(self):
  31                 return 2
  32
  33         def on_get_iter(self, path):
  34                 assert len(path) == 1
  35                 return path[0]
  36
  37         def on_get_value(self, iter, column):
  38                 if column == 0:
  39                         return self.list[iter]
  40                 return self.uri[self.list[iter]]
  41
  42         def on_iter_nth_child(self, iter, n):
  43                 if iter == None:
  44                         return n
  45                 return None
  46
  47         def on_get_column_type(self, col):
  48                 return str
  49
  50         def on_iter_has_child(self, iter):
  51                 return False
  52
  53         def on_iter_next(self, iter):
  54                 if iter < len(self.list) - 1:
  55                         return iter + 1
  56
  57         def __setitem__(self, prefix, uri):
  58                 if prefix in self.uri and self.uri[prefix] == uri:
  59                         return
  60
  61                 assert prefix
  62                 if prefix in fixed_ns:
  63                         raise Exception('That namespace prefix cannot be changed')
  64                 if uri in self.prefix:
  65                         raise Exception('That namespace already has a prefix (%s)' % self.prefix[uri])
  66
  67                 modifed = prefix in self.uri
  68
  69                 self.uri[prefix] = uri
  70                 self.update_list()
  71                 path = (self.list.index(prefix),)
  72
  73                 if modifed:
  74                         self.emit('row-changed', path, self.get_iter(path))
  75                 else:
  76                         self.emit('row-inserted', path, self.get_iter(path))
  77
  78         def __delitem__(self, iter):
  79                 prefix = self[iter][0]
  80                 if prefix in fixed_ns:
  81                         raise Exception('This is a built-in namespace and cannot be deleted')
  82                 path = (self.list.index(prefix),)
  83                 del self.uri[prefix]
  84                 self.update_list()
  85                 self.emit('row-deleted', path)
  86
  87         def ensure_ns(self, suggested_prefix, uri):
  88                 """Return the prefix for this URI. If none is set choose one (using suggested_prefix
  89                 if possible)."""
  90                 try:
  91                         return self.prefix[uri]
  92                 except KeyError:
  93                         if not suggested_prefix:
  94                                 suggested_prefix = common_ns.get(uri, 'ns')
  95                         if suggested_prefix in self.uri:
  96                                 x = 1
  97                                 while suggested_prefix + `x` in self.uri: x += 1
  98                                 suggested_prefix += `x`
  99                         self[suggested_prefix] = uri
 100                         #print "Added", suggested_prefix, uri
 101                         return suggested_prefix
 102
 103         def to_xml(self, doc):
 104                 node = doc.createElementNS(DOME_NS, 'dome:namespaces')
 105                 for prefix, uri in self.uri.iteritems():
 106                         if prefix in fixed_ns: continue
 107                         ns = doc.createElementNS(DOME_NS, 'dome:ns')
 108                         ns.setAttributeNS(None, 'prefix', prefix)
 109                         ns.setAttributeNS(None, 'uri', uri)
 110                         node.appendChild(ns)
 111                 return node
 112
 113 class GUI(rox.Dialog):
 114         def __init__(self, model):
 115                 rox.Dialog.__init__(self)
 116                 self.model = model
 117
 118                 self.add_button(g.STOCK_ADD, 1)
 119                 self.add_button(g.STOCK_DELETE, 2)
 120                 self.add_button(g.STOCK_CLOSE, g.RESPONSE_OK)
 121
 122                 tree = g.TreeView(model.namespaces)
 123
 124                 def response(dialog, resp):
 125                         if resp == 1:
 126                                 dialog.add_new(model.namespaces)
 127                         elif resp == 2:
 128                                 dialog.delete_selected(tree.get_selection())
 129                         else:
 130                                 dialog.destroy()
 131                 self.connect('response', response)
 132                 self.set_position(g.WIN_POS_MOUSE)
 133                 self.set_title('Namespaces for ' + `model.uri`)
 134
 135                 frame = g.Frame()
 136                 frame.add(tree)
 137                 frame.set_shadow_type(g.SHADOW_IN)
 138
 139                 cell = g.CellRendererText()
 140                 column = g.TreeViewColumn('Prefix', cell, text = 0)
 141                 tree.append_column(column)
 142
 143                 column = g.TreeViewColumn('URI', cell, text = 1)
 144                 tree.append_column(column)
 145
 146                 frame.show_all()
 147
 148                 self.vbox.pack_start(frame, True, True)
 149                 self.set_default_size(400, 200)
 150
 151                 self.set_has_separator(False)
 152
 153         def delete_selected(self, sel):
 154                 model, iter = sel.get_selected()
 155                 if not iter:
 156                         rox.alert('Select a namespace binding to delete')
 157                         return
 158                 try:
 159                         del model[iter]
 160                 except:
 161                         rox.report_exception()
 162
 163         def add_new(self, ns):
 164                 d = rox.Dialog()
 165
 166                 hbox = g.HBox(False, 2)
 167                 d.vbox.pack_start(hbox, False, True)
 168                 hbox.pack_start(g.Label('Prefix:'), False, True, 0)
 169                 prefix = g.Entry()
 170                 hbox.pack_start(prefix, True, True, 0)
 171
 172                 def check_prefix(entry):
 173                         if not uri.get_text():
 174                                 pre = prefix.get_text()
 175                                 for u, p in common_ns.iteritems():
 176                                         if p == pre:
 177                                                 uri.set_text(u)
 178                                                 break
 179                         uri.grab_focus()
 180
 181                 prefix.connect('activate', check_prefix)
 182
 183                 hbox = g.HBox(False, 2)
 184                 d.vbox.pack_start(hbox, False, True)
 185                 hbox.pack_start(g.Label('Namespace URI:'), False, True, 0)
 186                 uri = g.Entry()
 187                 hbox.pack_start(uri, True, True, 0)
 188                 uri.set_activates_default(True)
 189
 190                 d.vbox.show_all()
 191                 d.set_position(g.WIN_POS_MOUSE)
 192
 193                 prefix.grab_focus()
 194
 195                 d.add_button(g.STOCK_CANCEL, g.RESPONSE_CANCEL)
 196                 d.add_button(g.STOCK_OK, g.RESPONSE_OK)
 197
 198                 d.set_default_response(g.RESPONSE_OK)
 199
 200                 while 1:
 201                         if d.run() != g.RESPONSE_OK:
 202                                 d.destroy()
 203                                 return
 204                         try:
 205                                 ns[prefix.get_text()] = uri.get_text()
 206                                 break
 207                         except:
 208                                 rox.report_exception()
 209                 d.destroy()