[FIX] web: contexts on field widgets + enforce bin_size for binary

Field widgets now have a key 'context' that let them
extend the context of the dataPoint (e.g. list).

In particular, widgets on binary fields enforce the contextual
item {bin_size: True}, so that the server gives the size of the
binary field as its value, instead of its content.

This change on binary fields reduces network load when accessing
a view with binary fields.

2 files changed, 6 insertions, 0 deletions

diff --git a/addons/web/static/src/js/fields/abstract_field.js b/addons/web/static/src/js/fields/abstract_field.js
index 2534f8ae90a..8bb9afca065 100644
--- a/addons/web/static/src/js/fields/abstract_field.js
+++ b/addons/web/static/src/js/fields/abstract_field.js
@@ -45,6 +45,11 @@ var AbstractField = Widget.extend({
     },
 
     /**
+     * fields can extend the context, e.g. binary fields add {bin_size: true}
+     */
+    context: null,
+
+    /**
     * An object representing fields to be fetched by the model eventhough not present in the view
     * This object contains "field name" as key and an object as value.
     * That value object must contain the key "type"
diff --git a/addons/web/static/src/js/fields/basic_fields.js b/addons/web/static/src/js/fields/basic_fields.js
index 09406b43711..aab0e42c318 100644
--- a/addons/web/static/src/js/fields/basic_fields.js
+++ b/addons/web/static/src/js/fields/basic_fields.js
@@ -1080,6 +1080,7 @@ var AbstractFieldBinary = AbstractField.extend({
         },
         'click .o_clear_file_button': 'on_clear',
     }),
+    context: { bin_size: true },
     init: function (parent, name, record) {
         this._super.apply(this, arguments);
         this.fields = record.fields;