5 #from openerp.tools.safe_eval import safe_eval as eval
7 import xml # FIXME use lxml
9 from openerp.osv import osv, orm
11 _logger = logging.getLogger(__name__)
34 class QWebContext(dict):
35 def __init__(self, data, undefined_handler=None):
36 self.undefined_handler = undefined_handler
39 super(QWebContext, self).__init__(dic)
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.nodeType == 1 and 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)
113 except (osv.except_osv, orm.except_orm), err:
114 raise orm.except_orm("QWeb Error", "Invalid expression %r while rendering template '%s'.\n\n%s" % (expr, v.get('__template__'), err[1]))
116 raise SyntaxError("QWeb: invalid expression %r while rendering template '%s'.\n\n%s" % (expr, v.get('__template__'), traceback.format_exc()))
118 def eval_object(self, expr, v):
119 return self.eval(expr, v)
121 def eval_str(self, expr, v):
124 val = self.eval(expr, v)
125 if isinstance(val, unicode):
126 return val.encode("utf8")
129 def eval_format(self, expr, v):
131 for m in self._format_regex.finditer(expr):
133 expr = expr.replace(m.group(), self.eval_str(m.groups()[1] or m.groups()[3], 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, unicode):
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 " "
240 def render_att_href(self, e, an, av, v):
241 return self.url_for(e, an, av, v)
242 def render_att_src(self, e, an, av, v):
243 return self.url_for(e, an, av, v)
244 def render_att_action(self, e, an, av, v):
245 return self.url_for(e, an, av, v)
246 def url_for(self, e, an, av, v):
247 if 'url_for' not in v:
248 raise KeyError("qweb: no 'url_for' found in context")
249 path = str(v['url_for'](self.eval_format(av, v)))
250 return ' %s="%s"' % (an[2:], cgi.escape(path, 1))
253 def render_tag_raw(self, e, t_att, g_att, v):
254 inner = self.eval_str(t_att["raw"], v)
255 return self.render_element(e, t_att, g_att, v, inner)
257 def render_tag_rawf(self, e, t_att, g_att, v):
258 inner = self.eval_format(t_att["rawf"], v)
259 return self.render_element(e, t_att, g_att, v, inner)
261 def render_tag_esc(self, e, t_att, g_att, v):
262 inner = cgi.escape(self.eval_str(t_att["esc"], v))
263 return self.render_element(e, t_att, g_att, v, inner)
265 def render_tag_escf(self, e, t_att, g_att, v):
266 inner = cgi.escape(self.eval_format(t_att["escf"], v))
267 return self.render_element(e, t_att, g_att, v, inner)
269 def render_tag_foreach(self, e, t_att, g_att, v):
270 expr = t_att["foreach"]
271 enum = self.eval_object(expr, v)
273 var = t_att.get('as', expr).replace('.', '_')
274 d = QWebContext(v.copy(), self.undefined_handler)
276 if isinstance(enum, (list, tuple)):
278 elif hasattr(enum, 'count'):
280 d["%s_size" % var] = size
281 d["%s_all" % var] = enum
285 d["%s_value" % var] = i
286 d["%s_index" % var] = index
287 d["%s_first" % var] = index == 0
288 d["%s_even" % var] = index % 2
289 d["%s_odd" % var] = (index + 1) % 2
290 d["%s_last" % var] = index + 1 == size
292 d["%s_parity" % var] = 'odd'
294 d["%s_parity" % var] = 'even'
297 elif isinstance(i, dict):
299 ru.append(self.render_element(e, t_att, g_att, d))
303 raise NameError("QWeb: foreach enumerator %r is not defined while rendering template %r" % (expr, v.get('__template__')))
305 def render_tag_if(self, e, t_att, g_att, v):
306 if self.eval_bool(t_att["if"], v):
307 return self.render_element(e, t_att, g_att, v)
311 def render_tag_call(self, e, t_att, g_att, v):
312 if "import" in t_att:
315 d = QWebContext(v.copy(), self.undefined_handler)
316 d[0] = self.render_element(e, t_att, g_att, d)
317 return self.render(self.eval_format(t_att["call"], d), d)
319 def render_tag_set(self, e, t_att, g_att, v):
321 v[t_att["set"]] = self.eval_object(t_att["value"], v)
322 elif "valuef" in t_att:
323 v[t_att["set"]] = self.eval_format(t_att["valuef"], v)
325 v[t_att["set"]] = self.render_element(e, t_att, g_att, v)
328 def render_tag_field(self, e, t_att, g_att, v):
329 """ eg: <span t-record="browse_record(res.partner, 1)" t-field="phone">+1 555 555 8069</span>"""
330 node_name = e.nodeName
331 assert node_name not in ("table", "tbody", "thead", "tfoot", "tr", "td"),\
332 "RTE widgets do not work correctly on %r elements" % node_name
333 assert node_name != 't',\
334 "t-field can not be used on a t element, provide an actual HTML node"
336 record, field = t_att["field"].rsplit('.', 1)
337 record = self.eval_object(record, v)
340 field_type = record._model._all_columns[field].column._type
342 if field_type == 'many2one':
343 field_data = record.read([field])[0].get(field)
344 inner = field_data and field_data[1]
346 inner = getattr(record, field)
348 if isinstance(inner, unicode):
349 inner = inner.encode("utf8")
352 ' %s="%s"' % (name, cgi.escape(str(value), True))
354 ('data-oe-model', record._model._name),
355 ('data-oe-id', str(record.id)),
356 ('data-oe-field', field),
357 ('data-oe-type', column._type),
358 ('data-oe-translate', '1' if column.translate else '0'),
359 ('data-oe-expression', t_att['field']),
362 except AttributeError:
363 _logger.warning("t-field no field %s for model %s", field, record._model._name)
365 return self.render_element(e, t_att, g_att, v, str(inner or ""))