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

--HG--
branch : odoo8

__init__.py

@@ -1,5 +1 @@
 import ir_report
-import py3o_report
-import py3o_template
-import py3o_server
-import py3o_fusion_filetype

__openerp__.py

@@ -43,9 +43,6 @@ The py3o.template package is required; install it with:
     'data': [
         'menu.xml',
         'ir_report.xml',
-        'py3o_template.xml',
-        'py3o_server.xml',
-        'data/py3o.fusion.filetype.csv',
         'security/ir.model.access.csv',
     ],
     'installable': True,

ir_report.py

@@ -1,11 +1,15 @@
+import os
 from openerp.osv import fields, osv
+from openerp.report.interface import report_int
+from .py3o_parser import Py3oParser
+from openerp import addons
 
 
 class report_xml(osv.Model):
-    ''' Inherit from ir.actions.report.xml to allow customizing the template
+    """ Inherit from ir.actions.report.xml to allow customizing the template
     file. The user cam chose a template from a list.
     The list is configurable in the configuration tab, see py3o_template.py
-    '''
+    """
 
     _inherit = 'ir.actions.report.xml'
 
@@ -37,3 +41,45 @@ class report_xml(osv.Model):
                  u"any kind of report.",
         )
     }
+
+    def _lookup_report(self, cr, name):
+        """
+        Look up a report definition.
+        """
+
+        # First lookup in the deprecated place, because if the report
+        # definition has not been updated, it is more likely the correct
+        # definition is there. Only reports with custom parser
+        # specified in Python are still there.
+        if 'report.' + name in report_int._reports:
+            new_report = report_int._reports['report.' + name]
+            if not isinstance(new_report, Py3oParser):
+                new_report = None
+        else:
+            cr.execute(
+                'SELECT * '
+                'FROM ir_act_report_xml '
+                'WHERE report_name=%s AND report_type=%s',
+                (name, 'py3o')
+            )
+            r = cr.dictfetchone()
+            if r:
+                kwargs = {}
+                if r['parser']:
+                    kwargs['parser'] = getattr(addons, r['parser'])
+
+                new_report = Py3oParser(
+                    'report.' + r['report_name'],
+                    r['model'],
+                    os.path.join('addons', r['report_rml'] or '/'),
+                    header=r['header'],
+                    register=False,
+                    **kwargs
+                )
+            else:
+                new_report = None
+
+        if new_report:
+            return new_report
+        else:
+            return super(report_xml, self)._lookup_report(cr, name)

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