misc: generate <template> tags for live error display (#.....)

@@ -2357,3 +2357,3 @@
         assert len(rsps.calls) == 1
         assert '?xxx=FOO%20BAR%2030' in rsps.calls[-1].request.url
-        assert 'invalid value' not in resp
+        assert len(resp.pyquery('.error:not(#form_error_fieldname)')) == 0

@@ -538,3 +538,3 @@
     formdef.data_class().wipe()
     next_page = page.forms[0].submit('submit')  # but the field is required
-    assert next_page.pyquery('div.error').text() == 'required field'
+    assert next_page.pyquery('#form_error_f0').text() == 'required field'

@@ -1974,1 +1974,4 @@
     assert live_resp.json['result']['3']['content'] == '<p>Xbar {{ form_var_foo }}Ybar plopZ</p>'
+
+
+def test_field_live_validation(pub):

@@ -876,6 +876,7 @@ class WidgetField(Field):
     prefill = {}
 
     widget_class = None
+    widget_supports_live_validation = True

@@ -1639,6 +1641,7 @@ class FileField(WidgetField):
     key = 'file'
     description = _('File Upload')
     allow_complex = True
+    widget_supports_live_validation = False

@@ -940,6 +949,16 @@ class FormPage(FormdefDirectoryBase, FormTemplateMixin):
     def create_form(self, *args, **kwargs):
         form = self.formdef.create_form(*args, **kwargs)
         form.attrs['data-live-url'] = self.formdef.get_url(language=get_publisher().current_language) + 'live'
+        form.attrs['data-live-validation-url'] = (

@@ -1670,0 +1702,4 @@
+        if not field_ref:
+            return result_error('missing ?field parameter')
+
+        parts = field_ref.split('__')

@@ -1670,0 +1703,4 @@
+            return result_error('missing ?field parameter')
+
+        parts = field_ref.split('__')
+        if len(parts) not in (1, 3):

@@ -1670,0 +1721,4 @@
+
+        form = Form()
+        widget = field.add_to_form(form)
+        error = widget.get_error()

@@ -1670,0 +1726,4 @@
+            resp = {'err': 1, 'msg': str(error)}
+            if hasattr(widget, 'error_code'):
+                error_message = ErrorMessage(widget.error_code, '')
+                resp[error_message.camel_code()] = True

@@ -181,0 +185,4 @@
+        self.message = message
+
+    def camel_code(self):
+        return ''.join(x.lower() if i == 0 else x.capitalize() for i, x in enumerate(self.code.split('_')))

@@ -189,0 +223,4 @@
+Widget.get_value_missing_message = lambda x: Widget.REQUIRED_ERROR
+Widget.get_invalid_value_message = lambda x: _('Invalid value')
+Widget.set_error = widget_set_error
+Widget.set_error_code = widget_set_error_code

@@ -585,3 +623,3 @@
             self.value = self.value.strip()
             if self.maxlength and len(self.value) > self.maxlength:
-                self.error = _('Too long, value must be at most %d characters.') % self.maxlength
+                self.set_error_code('too_long')

@@ -593,0 +635,4 @@
+    def get_error_message_codes(self):
+        yield from super().get_error_message_codes()
+        if self.maxlength:
+            yield 'too_long'

@@ -881,3 +939,3 @@
                 token = get_session().add_tempfile(self.get('file'), storage=self.storage)['token']
             except UploadStorageError:
-                self.error = _('failed to store file (system error)')
+                self.set_error(_('failed to store file (system error)'))

@@ -181,0 +210,4 @@
+    # always add codes that may be generated by javascript validation API
+    yield 'value_missing'
+    yield 'bad_input'
+    yield 'type_mismatch'