6 #from openerp.tools.safe_eval import safe_eval as eval
8 import xml # FIXME use lxml
12 _logger = logging.getLogger(__name__)
14 class QWebContext(dict):
15 def __init__(self, data, undefined_handler=None):
16 self.undefined_handler = undefined_handler
39 dict.__init__(self, d)
40 self['defined'] = lambda key: key in self
42 def __getitem__(self, key):
45 elif not self.undefined_handler:
46 raise NameError("QWeb: name %r is not defined while rendering template %r" % (key, self.get('__template__')))
48 return self.get(key, self.undefined_handler(key, self))
50 class QWebXml(object):
51 """QWeb Xml templating engine
53 The templating engine use a very simple syntax, "magic" xml attributes, to
54 produce any kind of texutal output (even non-xml).
57 the template engine core implements the basic magic attributes:
59 t-att t-raw t-esc t-if t-foreach t-set t-call t-trim
62 - loader: function that return a template
66 def __init__(self, loader=None, undefined_handler=None):
68 self.undefined_handler = undefined_handler
69 self.node = xml.dom.Node
72 self._format_regex = re.compile('#\{(.*?)\}')
73 self._void_elements = set(['area', 'base', 'br', 'col', 'embed', 'hr', 'img', 'input', 'keygen',
74 'link', 'menuitem', 'meta', 'param', 'source', 'track', 'wbr'])
75 prefix = 'render_tag_'
76 for i in [j for j in dir(self) if j.startswith(prefix)]:
77 name = i[len(prefix):].replace('_', '-')
78 self._render_tag[name] = getattr(self.__class__, i)
81 prefix = 'render_att_'
82 for i in [j for j in dir(self) if j.startswith(prefix)]:
83 name = i[len(prefix):].replace('_', '-')
84 self._render_att[name] = getattr(self.__class__, i)
86 def register_tag(self, tag, func):
87 self._render_tag[tag] = func
89 def add_template(self, x):
90 if hasattr(x, 'documentElement'):
92 elif x.startswith("<?xml"):
93 dom = xml.dom.minidom.parseString(x)
95 dom = xml.dom.minidom.parse(x)
96 for n in dom.documentElement.childNodes:
97 if n.getAttribute('t-name'):
98 self._t[str(n.getAttribute("t-name"))] = n
100 def get_template(self, name):
104 xml = self.loader(name)
105 self.add_template(xml)
108 raise KeyError('qweb: template "%s" not found' % name)
110 def eval(self, expr, v):
112 return eval(expr, None, v)
114 raise SyntaxError("QWeb: invalid expression %r while rendering template '%s'.\n\n%s" % (expr, v.get('__template__'), traceback.format_exc()))
116 def eval_object(self, expr, v):
117 return self.eval(expr, v)
119 def eval_str(self, expr, v):
122 val = self.eval(expr, v)
123 if isinstance(val, unicode):
124 return val.encode("utf8")
127 def eval_format(self, expr, v):
129 for m in self._format_regex.finditer(expr):
131 expr = expr.replace(m.group(), self.eval_str(m.groups()[0], v))
138 raise Exception("QWeb: format error '%s' " % expr)
140 def eval_bool(self, expr, v):
141 val = self.eval(expr, v)
147 def render(self, tname, v=None, out=None):
150 v['__template__'] = tname
151 stack = v.get('__stack__', [])
153 v['__caller__'] = stack[-1]
155 v['__stack__'] = stack
156 v = QWebContext(v, self.undefined_handler)
157 return self.render_node(self.get_template(tname), v)
159 def render_node(self, e, v):
161 if e.nodeType == self.node.TEXT_NODE or e.nodeType == self.node.CDATA_SECTION_NODE:
162 r = e.data.encode("utf8")
163 elif e.nodeType == self.node.ELEMENT_NODE:
167 for (an, av) in e.attributes.items():
169 if isinstance(av, types.UnicodeType):
170 av = av.encode("utf8")
172 av = av.nodeValue.encode("utf8")
173 if an.startswith("t-"):
174 for i in self._render_att:
175 if an[2:].startswith(i):
176 g_att += self._render_att[i](self, e, an, av, v)
179 if an[2:] in self._render_tag:
183 g_att += ' %s="%s"' % (an, cgi.escape(av, 1))
185 if t_render in self._render_tag:
186 r = self._render_tag[t_render](self, e, t_att, g_att, v)
188 r = self.render_element(e, t_att, g_att, v)
191 def render_element(self, e, t_att, g_att, v, inner=None):
193 # t_att: t-* attributes
194 # g_att: generated attributes
196 # inner: optional innerXml
201 for n in e.childNodes:
202 g_inner.append(self.render_node(n, v))
203 name = str(e.nodeName)
204 inner = "".join(g_inner)
205 trim = t_att.get("trim", 0)
209 inner = inner.lstrip()
210 elif trim == 'right':
211 inner = inner.rstrip()
213 inner = inner.strip()
216 elif len(inner) or name not in self._void_elements:
217 return "<%s%s>%s</%s>" % (name, g_att, inner, name)
219 return "<%s%s/>" % (name, g_att)
222 def render_att_att(self, e, an, av, v):
223 if an.startswith("t-attf-"):
224 att, val = an[7:], self.eval_format(av, v)
225 elif an.startswith("t-att-"):
226 att, val = an[6:], self.eval_str(av, v)
228 att, val = self.eval_object(av, v)
229 return ' %s="%s"' % (att, cgi.escape(val, 1))
232 def render_tag_raw(self, e, t_att, g_att, v):
233 inner = self.eval_str(t_att["raw"], v)
234 return self.render_element(e, t_att, g_att, v, inner)
236 def render_tag_rawf(self, e, t_att, g_att, v):
237 inner = self.eval_format(t_att["rawf"], v)
238 return self.render_element(e, t_att, g_att, v, inner)
240 def render_tag_esc(self, e, t_att, g_att, v):
241 inner = cgi.escape(self.eval_str(t_att["esc"], v))
242 return self.render_element(e, t_att, g_att, v, inner)
244 def render_tag_escf(self, e, t_att, g_att, v):
245 inner = cgi.escape(self.eval_format(t_att["escf"], v))
246 return self.render_element(e, t_att, g_att, v, inner)
248 def render_tag_foreach(self, e, t_att, g_att, v):
249 expr = t_att["foreach"]
250 enum = self.eval_object(expr, v)
252 var = t_att.get('as', expr).replace('.', '_')
253 d = QWebContext(v.copy(), self.undefined_handler)
255 if isinstance(enum, types.ListType):
257 elif isinstance(enum, types.TupleType):
259 elif hasattr(enum, 'count'):
261 d["%s_size" % var] = size
262 d["%s_all" % var] = enum
266 d["%s_value" % var] = i
267 d["%s_index" % var] = index
268 d["%s_first" % var] = index == 0
269 d["%s_even" % var] = index % 2
270 d["%s_odd" % var] = (index + 1) % 2
271 d["%s_last" % var] = index + 1 == size
273 d["%s_parity" % var] = 'odd'
275 d["%s_parity" % var] = 'even'
276 if isinstance(i, types.DictType):
280 ru.append(self.render_element(e, t_att, g_att, d))
284 return "qweb: t-foreach %s not found." % expr
286 def render_tag_if(self, e, t_att, g_att, v):
287 if self.eval_bool(t_att["if"], v):
288 return self.render_element(e, t_att, g_att, v)
292 def render_tag_call(self, e, t_att, g_att, v):
293 if "import" in t_att:
296 d = QWebContext(v.copy(), self.undefined_handler)
297 d[0] = self.render_element(e, t_att, g_att, d)
298 return self.render(t_att["call"], d)
300 def render_tag_set(self, e, t_att, g_att, v):
302 v[t_att["set"]] = self.eval_object(t_att["value"], v)
303 elif "valuef" in t_att:
304 v[t_att["set"]] = self.eval_format(t_att["valuef"], v)
306 v[t_att["set"]] = self.render_element(e, t_att, g_att, v)
309 def render_tag_field(self, e, t_att, g_att, v):
310 """ eg: <span t-record="browse_record(res.partner, 1)" t-field="phone">+1 555 555 8069</span>"""
312 record, field = t_att["field"].rsplit('.', 1)
313 record = self.eval_object(record, v)
316 field_type = record._model._all_columns.get(field).column._type
318 if field_type == 'many2one':
319 field_data = record.read([field])[0].get(field)
320 inner = field_data and field_data[1] or ""
322 inner = getattr(record, field) or ""
323 if isinstance(inner, types.UnicodeType):
324 inner = inner.encode("utf8")
325 if field_type != 'html':
326 cgi.escape(str(inner))
329 ' %s="%s"' % (name, cgi.escape(str(value), True))
331 ('data-oe-model', record._model._name),
332 ('data-oe-id', str(record.id)),
333 ('data-oe-field', field),
334 ('data-oe-type', field_type),
337 except AttributeError:
338 _logger.warning("t-field no field %s for model %s", field, record._model._name)
340 return self.render_element(e, t_att, g_att, v, str(inner))