5 #from openerp.tools.safe_eval import safe_eval as eval
7 import xml # FIXME use lxml
10 from openerp.osv import osv, orm
12 _logger = logging.getLogger(__name__)
35 class QWebContext(dict):
36 def __init__(self, data, undefined_handler=None):
37 self.undefined_handler = undefined_handler
40 dict.__init__(self, dic)
41 self['defined'] = lambda key: key in self
43 def __getitem__(self, key):
46 elif not self.undefined_handler:
47 raise NameError("QWeb: name %r is not defined while rendering template %r" % (key, self.get('__template__')))
49 return self.get(key, self.undefined_handler(key, self))
51 class QWebXml(object):
52 """QWeb Xml templating engine
54 The templating engine use a very simple syntax, "magic" xml attributes, to
55 produce any kind of texutal output (even non-xml).
58 the template engine core implements the basic magic attributes:
60 t-att t-raw t-esc t-if t-foreach t-set t-call t-trim
63 - loader: function that return a template
67 def __init__(self, loader=None, undefined_handler=None):
69 self.undefined_handler = undefined_handler
70 self.node = xml.dom.Node
73 self._format_regex = re.compile('#\{(.*?)\}')
74 self._void_elements = set(['area', 'base', 'br', 'col', 'embed', 'hr', 'img', 'input', 'keygen',
75 'link', 'menuitem', 'meta', 'param', 'source', 'track', 'wbr'])
76 prefix = 'render_tag_'
77 for i in [j for j in dir(self) if j.startswith(prefix)]:
78 name = i[len(prefix):].replace('_', '-')
79 self._render_tag[name] = getattr(self.__class__, i)
82 prefix = 'render_att_'
83 for i in [j for j in dir(self) if j.startswith(prefix)]:
84 name = i[len(prefix):].replace('_', '-')
85 self._render_att[name] = getattr(self.__class__, i)
87 def register_tag(self, tag, func):
88 self._render_tag[tag] = func
90 def add_template(self, x):
91 if hasattr(x, 'documentElement'):
93 elif x.startswith("<?xml"):
94 dom = xml.dom.minidom.parseString(x)
96 dom = xml.dom.minidom.parse(x)
97 for n in dom.documentElement.childNodes:
98 if n.nodeType == 1 and n.getAttribute('t-name'):
99 self._t[str(n.getAttribute("t-name"))] = n
101 def get_template(self, name):
105 xml = self.loader(name)
106 self.add_template(xml)
109 raise KeyError('qweb: template "%s" not found' % name)
111 def eval(self, expr, v):
113 return eval(expr, None, v)
114 except (osv.except_osv, orm.except_orm), err:
115 raise orm.except_orm("QWeb Error", "Invalid expression %r while rendering template '%s'.\n\n%s" % (expr, v.get('__template__'), err[1]))
117 raise SyntaxError("QWeb: invalid expression %r while rendering template '%s'.\n\n%s" % (expr, v.get('__template__'), traceback.format_exc()))
119 def eval_object(self, expr, v):
120 return self.eval(expr, v)
122 def eval_str(self, expr, v):
125 val = self.eval(expr, v)
126 if isinstance(val, unicode):
127 return val.encode("utf8")
130 def eval_format(self, expr, v):
132 for m in self._format_regex.finditer(expr):
134 expr = expr.replace(m.group(), self.eval_str(m.groups()[0], v))
141 raise Exception("QWeb: format error '%s' " % expr)
143 def eval_bool(self, expr, v):
144 val = self.eval(expr, v)
150 def render(self, tname, v=None, out=None):
153 v['__template__'] = tname
154 stack = v.get('__stack__', [])
156 v['__caller__'] = stack[-1]
158 v['__stack__'] = stack
159 v = QWebContext(v, self.undefined_handler)
160 return self.render_node(self.get_template(tname), v)
162 def render_node(self, e, v):
164 if e.nodeType == self.node.TEXT_NODE or e.nodeType == self.node.CDATA_SECTION_NODE:
165 r = e.data.encode("utf8")
166 elif e.nodeType == self.node.ELEMENT_NODE:
170 for (an, av) in e.attributes.items():
172 if isinstance(av, types.UnicodeType):
173 av = av.encode("utf8")
175 av = av.nodeValue.encode("utf8")
176 if an.startswith("t-"):
177 for i in self._render_att:
178 if an[2:].startswith(i):
179 g_att += self._render_att[i](self, e, an, av, v)
182 if an[2:] in self._render_tag:
186 g_att += ' %s="%s"' % (an, cgi.escape(av, 1))
189 debugger = t_att.get('debug', 'pdb')
190 __import__(debugger).set_trace() # pdb, ipdb, pudb, ...
192 if t_render in self._render_tag:
193 r = self._render_tag[t_render](self, e, t_att, g_att, v)
195 r = self.render_element(e, t_att, g_att, v)
198 def render_element(self, e, t_att, g_att, v, inner=None):
200 # t_att: t-* attributes
201 # g_att: generated attributes
203 # inner: optional innerXml
208 for n in e.childNodes:
209 g_inner.append(self.render_node(n, v))
210 name = str(e.nodeName)
211 inner = "".join(g_inner)
212 trim = t_att.get("trim", 0)
216 inner = inner.lstrip()
217 elif trim == 'right':
218 inner = inner.rstrip()
220 inner = inner.strip()
223 elif len(inner) or name not in self._void_elements:
224 return "<%s%s>%s</%s>" % (name, g_att, inner, name)
226 return "<%s%s/>" % (name, g_att)
229 def render_att_att(self, e, an, av, v):
230 if an.startswith("t-attf-"):
231 att, val = an[7:], self.eval_format(av, v)
232 elif an.startswith("t-att-"):
233 att, val = an[6:], self.eval(av, v)
234 if isinstance(val, unicode):
235 val = val.encode("utf8")
237 att, val = self.eval_object(av, v)
238 return val and ' %s="%s"' % (att, cgi.escape(str(val), 1)) or " "
241 def render_tag_raw(self, e, t_att, g_att, v):
242 inner = self.eval_str(t_att["raw"], v)
243 return self.render_element(e, t_att, g_att, v, inner)
245 def render_tag_rawf(self, e, t_att, g_att, v):
246 inner = self.eval_format(t_att["rawf"], v)
247 return self.render_element(e, t_att, g_att, v, inner)
249 def render_tag_esc(self, e, t_att, g_att, v):
250 inner = cgi.escape(self.eval_str(t_att["esc"], v))
251 return self.render_element(e, t_att, g_att, v, inner)
253 def render_tag_escf(self, e, t_att, g_att, v):
254 inner = cgi.escape(self.eval_format(t_att["escf"], v))
255 return self.render_element(e, t_att, g_att, v, inner)
257 def render_tag_foreach(self, e, t_att, g_att, v):
258 expr = t_att["foreach"]
259 enum = self.eval_object(expr, v)
261 var = t_att.get('as', expr).replace('.', '_')
262 d = QWebContext(v.copy(), self.undefined_handler)
264 if isinstance(enum, (types.ListType, types.TupleType)):
266 elif hasattr(enum, 'count'):
268 d["%s_size" % var] = size
269 d["%s_all" % var] = enum
273 d["%s_value" % var] = i
274 d["%s_index" % var] = index
275 d["%s_first" % var] = index == 0
276 d["%s_even" % var] = index % 2
277 d["%s_odd" % var] = (index + 1) % 2
278 d["%s_last" % var] = index + 1 == size
280 d["%s_parity" % var] = 'odd'
282 d["%s_parity" % var] = 'even'
285 elif isinstance(i, types.DictType):
287 ru.append(self.render_element(e, t_att, g_att, d))
291 raise NameError("QWeb: foreach enumerator %r is not defined while rendering template %r" % (expr, v.get('__template__')))
293 def render_tag_if(self, e, t_att, g_att, v):
294 if self.eval_bool(t_att["if"], v):
295 return self.render_element(e, t_att, g_att, v)
299 def render_tag_call(self, e, t_att, g_att, v):
300 if "import" in t_att:
303 d = QWebContext(v.copy(), self.undefined_handler)
304 d[0] = self.render_element(e, t_att, g_att, d)
305 return self.render(self.eval_format(t_att["call"], d), d)
307 def render_tag_set(self, e, t_att, g_att, v):
309 v[t_att["set"]] = self.eval_object(t_att["value"], v)
310 elif "valuef" in t_att:
311 v[t_att["set"]] = self.eval_format(t_att["valuef"], v)
313 v[t_att["set"]] = self.render_element(e, t_att, g_att, v)
316 def render_tag_field(self, e, t_att, g_att, v):
317 """ eg: <span t-record="browse_record(res.partner, 1)" t-field="phone">+1 555 555 8069</span>"""
319 record, field = t_att["field"].rsplit('.', 1)
320 record = self.eval_object(record, v)
323 field_type = record._model._all_columns[field].column._type
325 if field_type == 'many2one':
326 field_data = record.read([field])[0].get(field)
327 inner = field_data and field_data[1]
329 inner = getattr(record, field)
331 if isinstance(inner, unicode):
332 inner = inner.encode("utf8")
336 ' %s="%s"' % (name, cgi.escape(str(value), True))
338 ('data-oe-model', record._model._name),
339 ('data-oe-id', str(record.id)),
340 ('data-oe-field', field),
341 ('data-oe-type', field_type),
344 except AttributeError:
345 _logger.warning("t-field no field %s for model %s", field, record._model._name)
347 return self.render_element(e, t_att, g_att, v, str(inner or ""))