[ADD] new fields.Monetary + updated widgets

Enhance current widget="monetary" client-side feature and
convert it to a first-class type of field, allowing proper
server-side behavior.

- fields: add field.Monetary, similar to fields.Float but
  supporting a `currency_field` attribute instead of the
  decimal_precision attribute.
  `currency_field` indicates the field holding the
  related currency on the same record.
  The symbol of that currency is used when displaying
  the field, and the rounding of the currency is applied
  instead of the usual decimal precision.
- avoids application of a second decimal precision rounding,
  as was the case when the model field was a `fields.float`.
- removes the need for adding explicit boilerplate to each
  view containing a monetary field, i.e.:
    widget="monetary" options="{'currency_field': 'currency_id'}"
- res.currency: add new field decimal_places needed to round
  value at the correct decimal places
- web: cache all currencies, rounding and symbols at
  webclient startup to speedup monetary fields
- new widget monetary for list view + adapt widget monetary
  on form view

Limitations:
- if the currency_field is a related field, the server-side
  application of currency rounding will only work when the
  record already exists, not during creation (to be fixed)
- this field is only supported in the new API

1 files changed, 15 insertions, 1 deletions

diff --git a/addons/web/static/src/js/framework/session.js b/addons/web/static/src/js/framework/session.js
index 5f6d4c91ea2..8b084f640fd 100644
--- a/addons/web/static/src/js/framework/session.js
+++ b/addons/web/static/src/js/framework/session.js
@@ -40,6 +40,7 @@ var Session = core.Class.extend(mixins.EventDispatcherMixin, {
         this.name = "instance0";
         // TODO: session store in cookie should be optional
         this.qweb_mutex = new utils.Mutex();
+        this.currencies = {};
     },
     setup: function(origin, options) {
         // must be able to customize server
@@ -169,7 +170,7 @@ var Session = core.Class.extend(mixins.EventDispatcherMixin, {
             var to_load = _.difference(result, self.module_list).join(',');
             self.module_list = all_modules;
 
-            var loaded = self.load_translations();
+            var loaded = $.when(self.load_currencies(), self.load_translations());
             var locale = "/web/webclient/locale/" + self.user_context.lang || 'en_US';
             var file_list = [ locale ];
             if(to_load.length) {
@@ -190,6 +191,16 @@ var Session = core.Class.extend(mixins.EventDispatcherMixin, {
             });
         });
     },
+    load_currencies: function() {
+        this.currencies = {};
+        var self = this;
+        return new openerp.web.Model("res.currency").query(["symbol", "position", "decimal_places"]).all()
+                .then(function(value) {
+                    _.each(value, function(k){
+                        self.currencies[k.id] = {'symbol': k.symbol, 'position': k.position, 'digits': [69,k.decimal_places]};
+                    });
+                });
+    },
     load_translations: function() {
         return _t.database.load_translations(this, this.module_list, this.user_context.lang);
     },
@@ -240,6 +251,9 @@ var Session = core.Class.extend(mixins.EventDispatcherMixin, {
             this.module_loaded[mod] = true;
         }
     },
+    get_currency: function(currency_id) {
+        return this.currencies[currency_id];
+    },
     get_file: function (options) {
         if (this.override_session){
             options.data.session_id = this.session_id;