5 from openerp.tools.safe_eval_qweb import safe_eval_qweb as eval, UndefinedError, SecurityError
7 import xml # FIXME use lxml
9 from openerp.osv import osv, orm
11 _logger = logging.getLogger(__name__)
14 class QWebXml(object):
15 """QWeb Xml templating engine
17 The templating engine use a very simple syntax, "magic" xml attributes, to
18 produce any kind of texutal output (even non-xml).
21 the template engine core implements the basic magic attributes:
23 t-att t-raw t-esc t-if t-foreach t-set t-call t-trim
26 - loader: function that return a template
30 def __init__(self, loader=None, undefined_handler=None):
32 self.undefined_handler = undefined_handler
33 self.node = xml.dom.Node
36 self._format_regex = re.compile('(#\{(.*?)\})|(\{\{(.*?)\}\})')
37 self._void_elements = set(['area', 'base', 'br', 'col', 'embed', 'hr', 'img', 'input', 'keygen',
38 'link', 'menuitem', 'meta', 'param', 'source', 'track', 'wbr'])
39 prefix = 'render_tag_'
40 for i in [j for j in dir(self) if j.startswith(prefix)]:
41 name = i[len(prefix):].replace('_', '-')
42 self._render_tag[name] = getattr(self.__class__, i)
45 prefix = 'render_att_'
46 for i in [j for j in dir(self) if j.startswith(prefix)]:
47 name = i[len(prefix):].replace('_', '-')
48 self._render_att[name] = getattr(self.__class__, i)
50 def register_tag(self, tag, func):
51 self._render_tag[tag] = func
53 def add_template(self, x):
54 if hasattr(x, 'documentElement'):
56 elif x.startswith("<?xml"):
57 dom = xml.dom.minidom.parseString(x)
59 dom = xml.dom.minidom.parse(x)
60 for n in dom.documentElement.childNodes:
61 if n.nodeType == 1 and n.getAttribute('t-name'):
62 self._t[str(n.getAttribute("t-name"))] = n
64 def get_template(self, name):
68 xml = self.loader(name)
69 self.add_template(xml)
72 raise KeyError('qweb: template "%s" not found' % name)
74 def eval(self, expr, v):
76 return eval(expr, None, v)
77 except (osv.except_osv, orm.except_orm), err:
78 raise orm.except_orm("QWeb Error", "Invalid expression %r while rendering template '%s'.\n\n%s" % (expr, v.get('__template__'), err[1]))
79 except (UndefinedError, SecurityError), err:
80 if self.undefined_handler:
81 return self.undefined_handler(expr, v)
83 raise SyntaxError(err.message)
85 raise SyntaxError("QWeb: invalid expression %r while rendering template '%s'.\n\n%s" % (expr, v.get('__template__'), traceback.format_exc()))
87 def eval_object(self, expr, v):
88 return self.eval(expr, v)
90 def eval_str(self, expr, v):
93 val = self.eval(expr, v)
95 if isinstance(val, unicode):
96 return val.encode("utf8")
99 def eval_format(self, expr, v):
101 for m in self._format_regex.finditer(expr):
103 expr = expr.replace(m.group(), self.eval_str(m.groups()[1] or m.groups()[3], v))
111 raise Exception("QWeb: format error '%s' " % expr)
113 def eval_bool(self, expr, v):
114 val = self.eval(expr, v)
120 def render(self, tname, v=None, out=None):
123 v['__template__'] = tname
124 stack = v.get('__stack__', [])
126 v['__caller__'] = stack[-1]
128 v['__stack__'] = stack
129 return self.render_node(self.get_template(tname), v)
131 def render_node(self, e, v):
133 if e.nodeType == self.node.TEXT_NODE or e.nodeType == self.node.CDATA_SECTION_NODE:
134 r = e.data.encode("utf8")
135 elif e.nodeType == self.node.ELEMENT_NODE:
139 for (an, av) in e.attributes.items():
141 if isinstance(av, unicode):
142 av = av.encode("utf8")
144 av = av.nodeValue.encode("utf8")
145 if an.startswith("t-"):
146 for i in self._render_att:
147 if an[2:].startswith(i):
148 g_att += self._render_att[i](self, e, an, av, v)
151 if an[2:] in self._render_tag:
155 g_att += ' %s="%s"' % (an, werkzeug.utils.escape(av))
158 debugger = t_att.get('debug', 'pdb')
159 __import__(debugger).set_trace() # pdb, ipdb, pudb, ...
161 if t_render in self._render_tag:
162 r = self._render_tag[t_render](self, e, t_att, g_att, v)
164 r = self.render_element(e, t_att, g_att, v)
165 if isinstance(r, unicode):
166 return r.encode('utf-8')
169 def render_element(self, e, t_att, g_att, v, inner=None):
171 # t_att: t-* attributes
172 # g_att: generated attributes
174 # inner: optional innerXml
179 for n in e.childNodes:
180 g_inner.append(self.render_node(n, v))
181 name = str(e.nodeName)
182 inner = "".join(g_inner)
183 trim = t_att.get("trim", 0)
187 inner = inner.lstrip()
188 elif trim == 'right':
189 inner = inner.rstrip()
191 inner = inner.strip()
194 elif len(inner) or name not in self._void_elements:
195 return "<%s%s>%s</%s>" % tuple(
196 v if isinstance(v, str) else v.encode('utf-8')
197 for v in (name, g_att, inner, name))
199 return "<%s%s/>" % (name, g_att)
202 def render_att_att(self, e, an, av, v):
203 if an.startswith("t-attf-"):
204 att, val = an[7:], self.eval_format(av, v)
205 elif an.startswith("t-att-"):
206 att, val = an[6:], self.eval(av, v)
207 if isinstance(val, unicode):
208 val = val.encode("utf8")
210 att, val = self.eval_object(av, v)
211 return val and ' %s="%s"' % (att, werkzeug.utils.escape(val)) or " "
213 def render_att_href(self, e, an, av, v):
214 return self.url_for(e, an, av, v)
215 def render_att_src(self, e, an, av, v):
216 return self.url_for(e, an, av, v)
217 def render_att_action(self, e, an, av, v):
218 return self.url_for(e, an, av, v)
219 def url_for(self, e, an, av, v):
220 if 'url_for' not in v:
221 raise KeyError("qweb: no 'url_for' found in context")
222 path = str(v['url_for'](self.eval_format(av, v)))
223 return ' %s="%s"' % (an[2:], werkzeug.utils.escape(path))
226 def render_tag_raw(self, e, t_att, g_att, v):
227 inner = self.eval_str(t_att["raw"], v)
228 return self.render_element(e, t_att, g_att, v, inner)
230 def render_tag_rawf(self, e, t_att, g_att, v):
231 inner = self.eval_format(t_att["rawf"], v)
232 return self.render_element(e, t_att, g_att, v, inner)
234 def render_tag_esc(self, e, t_att, g_att, v):
235 inner = werkzeug.utils.escape(self.eval_str(t_att["esc"], v))
236 return self.render_element(e, t_att, g_att, v, inner)
238 def render_tag_escf(self, e, t_att, g_att, v):
239 inner = werkzeug.utils.escape(self.eval_format(t_att["escf"], v))
240 return self.render_element(e, t_att, g_att, v, inner)
242 def render_tag_foreach(self, e, t_att, g_att, v):
243 expr = t_att["foreach"]
244 enum = self.eval_object(expr, v)
246 var = t_att.get('as', expr).replace('.', '_')
249 if isinstance(enum, (list, tuple)):
251 elif hasattr(enum, 'count'):
253 d["%s_size" % var] = size
254 d["%s_all" % var] = enum
258 d["%s_value" % var] = i
259 d["%s_index" % var] = index
260 d["%s_first" % var] = index == 0
261 d["%s_even" % var] = index % 2
262 d["%s_odd" % var] = (index + 1) % 2
263 d["%s_last" % var] = index + 1 == size
265 d["%s_parity" % var] = 'odd'
267 d["%s_parity" % var] = 'even'
270 elif isinstance(i, dict):
272 ru.append(self.render_element(e, t_att, g_att, d))
276 raise NameError("QWeb: foreach enumerator %r is not defined while rendering template %r" % (expr, v.get('__template__')))
278 def render_tag_if(self, e, t_att, g_att, v):
279 if self.eval_bool(t_att["if"], v):
280 return self.render_element(e, t_att, g_att, v)
284 def render_tag_call(self, e, t_att, g_att, v):
285 if "import" in t_att:
289 d[0] = self.render_element(e, t_att, g_att, d)
290 return self.render(self.eval_format(t_att["call"], d), d)
292 def render_tag_set(self, e, t_att, g_att, v):
294 v[t_att["set"]] = self.eval_object(t_att["value"], v)
295 elif "valuef" in t_att:
296 v[t_att["set"]] = self.eval_format(t_att["valuef"], v)
298 v[t_att["set"]] = self.render_element(e, t_att, g_att, v)
301 def render_tag_field(self, e, t_att, g_att, v):
302 """ eg: <span t-record="browse_record(res.partner, 1)" t-field="phone">+1 555 555 8069</span>"""
303 node_name = e.nodeName
304 assert node_name not in ("table", "tbody", "thead", "tfoot", "tr", "td",
305 "ol", "ul", "ol", "dl", "dt", "dd"),\
306 "RTE widgets do not work correctly on %r elements" % node_name
307 assert node_name != 't',\
308 "t-field can not be used on a t element, provide an actual HTML node"
310 record, field = t_att["field"].rsplit('.', 1)
311 record = self.eval_object(record, v)
313 column = record._model._all_columns[field].column
314 field_type = column._type
317 converter = req.registry['ir.fields.converter'].from_field(
318 req.cr, req.uid, record._model, column, totype='html')
322 value = record[field]
324 content, warnings = converter(value)
327 _logger.warning("t-field no field %s for model %s", field, record._model._name)
330 ' %s="%s"' % (name, werkzeug.utils.escape(value))
332 ('data-oe-model', record._model._name),
333 ('data-oe-id', record.id),
334 ('data-oe-field', field),
335 ('data-oe-type', field_type),
336 ('data-oe-translate', '1' if column.translate else '0'),
337 ('data-oe-expression', t_att['field']),
341 return self.render_element(e, t_att, g_att, v, content or "")