Development of Py3o Parser to reproduce the behaviour of WebKit Report but using py3o engines

--HG--
branch : odoo8

py3o_parser.py

@@ -0,0 +1,102 @@
+from openerp.report.report_sxw import report_sxw, rml_parse
+from openerp import registry
+
+
+_extender_functions = {}
+
+
+def py3o_report_extender(report_name):
+    """
+    A decorator to define function to extend the context sent to a template.
+    This will be called at the creation of the report.
+    The following arguments will be passed to it:
+        - pool: the model pool
+        - cr: the database cursor
+        - uid: the id of the user that call the renderer
+        - localcontext: The context that will be passed to the report engine
+        - context: the Odoo context
+
+    Method copied from CampToCamp report_webkit module.
+
+    :param report_name: xml id of the report
+    :return:
+    """
+    def fct1(fct):
+        lst = _extender_functions.get(report_name)
+        if not lst:
+            lst = []
+            _extender_functions[report_name] = lst
+        lst.append(fct)
+        return fct
+    return fct1
+
+
+class Py3oParser(report_sxw):
+    """Custom class that use Py3o to render libroffice reports.
+        Code partially taken from CampToCamp."""
+
+    def __init__(self, name, table, rml=False, parser=rml_parse,
+                 header=False, store=False, register=True):
+        self.localcontext = {}
+        super(Py3oParser, self).__init__(
+            name, table, rml=rml, parser=parser,
+            header=header, store=store, register=register
+        )
+
+    def create_single_pdf(self, cr, uid, ids, data, report_xml, context=None):
+        """ Overide this function to generate our py3o report
+        """
+        if report_xml.report_type != 'py3o':
+            return super(Py3oParser, self).create_single_pdf(
+                cr, uid, ids, data, report_xml, context=context
+            )
+
+        pool = registry(cr.dbname)
+        model_data_ids = pool['ir.model.data'].search(
+            cr, uid, [
+                ('model', '=', 'ir.actions.report.xml'),
+                ('res_id', '=', report_xml.id),
+            ]
+        )
+
+        xml_id = None
+        if model_data_ids:
+            model_data = pool['ir.model.data'].browse(
+                cr, uid, model_data_ids[0], context=context
+            )
+            xml_id = '%s,%s' % (model_data.module, model_data.name)
+
+        parser_instance = self.parser(cr, uid, self.name2, context=context)
+        parser_instance.set_context(
+            self.getObjects(cr, uid, ids, context),
+            data, ids, report_xml.report_type
+        )
+
+        if xml_id in _extender_functions:
+            for fct in _extender_functions[xml_id]:
+                pass
+
+    def create(self, cr, uid, ids, data, context=None):
+        """ Override this function to handle our py3o report
+        """
+        pool = registry(cr.dbname)
+        ir_action_report_obj = pool['ir.actions.report.xml']
+        report_xml_ids = ir_action_report_obj.search(
+            cr, uid, [('report_name', '=', self.name[7:])], context=context
+        )
+        if not report_xml_ids:
+            return super(Py3oParser, self).create(
+                cr, uid, ids, data, context=context
+            )
+
+        report_xml = ir_action_report_obj.browse(
+            cr, uid, report_xml_ids[0], context=context
+        )
+
+        result = self.create_source_pdf(
+            cr, uid, ids, data, report_xml, context
+        )
+
+        if not result:
+            return False, False
+        return result