[IMP] web: float_factor and float_toggle widgets

This commit provides new js widgets for list, kanban and form
views on float field.

1/ 'float_factor' displays the normal float field, but takes a
conversion factor as option. The displays value is the normal
one multiplied by the factor.

You can use the widget like
<field name="my_float_field" widget="float_factor"
option="{'factor': 2}"/>

2/ 'float_toggle' displays a button (in edit mode) looping on a
range of given value at each click. A conversion factor is optional
(default will be 1) to display a converted value, but sent to
non converted one to the server.

You can use the widget like
<field name="my_float" widget="float_toggle"
option="{'range': [0, 0.5, 1], 'factor': 2}"/>

'range' and 'factor' are put in the options.
In simple read mode, the widget display the value as a traditionnal
text (like a normal char field).

This commit provides tests and documentation for those 2 widgets.

Task #39079

addons/web/static/tests/fields/basic_fields_tests.js

@@ -3264,6 +3264,90 @@ QUnit.module('basic_fields', {
     });
 
 
+    QUnit.module('FieldFloatFactor');
+
+    QUnit.test('float_factor field in form view', function (assert) {
+        assert.expect(4);
+
+        var form = createView({
+            View: FormView,
+            model: 'partner',
+            data: this.data,
+            arch:'<form string="Partners">' +
+                    '<sheet>' +
+                        '<field name="qux" widget="float_factor" options="{\'factor\': 0.5}" digits="[16,2]"/>' +
+                    '</sheet>' +
+                '</form>',
+            mockRPC: function (route, args) {
+                if (route === '/web/dataset/call_kw/partner/write') {
+                    // 16.4 / 2 = 8.2
+                    assert.strictEqual(args.args[1].qux, 4.6, 'the correct float value should be saved');
+                }
+                return this._super.apply(this, arguments);
+            },
+            res_id: 5,
+        });
+        assert.strictEqual(form.$('.o_field_widget').first().text(), '4.55', // 9.1 / 0.5
+            'The formatted value should be displayed properly.');
+
+        form.$buttons.find('.o_form_button_edit').click();
+        assert.strictEqual(form.$('input').val(), '4.55',
+            'The value should be rendered correctly in the input.');
+
+        form.$('input').val('2.3').trigger('input');
+
+        form.$buttons.find('.o_form_button_save').click();
+        assert.strictEqual(form.$('.o_field_widget').first().text(), '2.30',
+            'The new value should be saved and displayed properly.');
+
+        form.destroy();
+    });
+
+    QUnit.module('FieldFloatToggle');
+
+    QUnit.test('float_toggle field in form view', function (assert) {
+        assert.expect(5);
+
+        var form = createView({
+            View: FormView,
+            model: 'partner',
+            data: this.data,
+            arch:'<form string="Partners">' +
+                    '<sheet>' +
+                        '<field name="qux" widget="float_toggle" options="{\'factor\': 0.125, \'range\': [0, 1, 0.75, 0.5, 0.25]}" digits="[5,3]"/>' +
+                    '</sheet>' +
+                '</form>',
+            mockRPC: function (route, args) {
+                if (route === '/web/dataset/call_kw/partner/write') {
+                    // 1.000 / 0.125 = 8
+                    assert.strictEqual(args.args[1].qux, 8, 'the correct float value should be saved');
+                }
+                return this._super.apply(this, arguments);
+            },
+            res_id: 1,
+        });
+        assert.strictEqual(form.$('.o_field_widget').first().text(), '0.056',
+            'The formatted time value should be displayed properly.');
+
+        form.$buttons.find('.o_form_button_edit').click();
+
+        assert.strictEqual(form.$('button.o_field_float_toggle').text(), '0.056',
+            'The value should be rendered correctly on the button.');
+
+        form.$('button.o_field_float_toggle').click(); // clicking will make the next value 1, since 0 was the closest of 0.056
+
+        assert.strictEqual(form.$('button.o_field_float_toggle').text(), '1.000',
+            'The value should be rendered correctly on the button.');
+
+        form.$buttons.find('.o_form_button_save').click();
+
+        assert.strictEqual(form.$('.o_field_widget').first().text(), '1.000',
+            'The new value should be saved and displayed properly.');
+
+        form.destroy();
+    });
+
+
     QUnit.module('PhoneWidget');
 
     QUnit.test('phone field in form view on extra small screens', function (assert) {