Add attachment preview

issue10203
review332271014

trytond/ir/attachment.py

@@ -6,6 +6,7 @@ from sql.operators import Concat
 from trytond.config import config
 from trytond.i18n import lazy_gettext
 from trytond.model import ModelView, ModelSQL, fields
+from trytond.pool import Pool
 from trytond.pyson import Eval
 from trytond.tools import firstline
 from trytond.transaction import Transaction
@@ -96,6 +97,17 @@ class Attachment(ResourceMixin, ModelSQL, ModelView):
     def on_change_with_summary(self, name=None):
         return firstline(self.description or '')
 
+    @classmethod
+    def fields_view_get(cls, view_id=None, view_type='form', level=None):
+        pool = Pool()
+        ModelData = pool.get('ir.model.data')
+        if not view_id:
+            if Transaction().context.get('preview'):
+                view_id = ModelData.get_id(
+                    'ir', 'attachment_view_form_preview')
+        return super().fields_view_get(
+            view_id=view_id, view_type=view_type, level=level)
+
 
 class AttachmentCopyMixin(
         resource_copy(

trytond/ir/attachment.xml

@@ -8,6 +8,12 @@ this repository contains the full copyright notices and license terms. -->
             <field name="type">form</field>
             <field name="name">attachment_form</field>
         </record>
+        <record model="ir.ui.view" id="attachment_view_form_preview">
+            <field name="model">ir.attachment</field>
+            <field name="type">form</field>
+            <field name="priority" eval="50"/>
+            <field name="name">attachment_form_preview</field>
+        </record>
         <record model="ir.ui.view" id="attachment_view_tree">
             <field name="model">ir.attachment</field>
             <field name="type">tree</field>

trytond/ir/view/attachment_form_preview.xml

@@ -0,0 +1,7 @@
+<?xml version="1.0"?>
+<!-- This file is part of Tryton.  The COPYRIGHT file at the top level of
+this repository contains the full copyright notices and license terms. -->
+<form col="1">
+    <field name="data" widget="document" readonly="1"/>
+    <label name="name" string="" xalign="0.5"/>
+</form>