[FIX] web: decoration on a many2one field

Before this commit, in a list view, the style of a decoration on a m2o
widget was ignored. For example, when applying the danger decoration,
we want the m2o field to be in red.

How to reproduce:

Go to a list view with a field having the many2one widget and
a danger-decoration.
Have a line that respects the decoration condition.
Before this commit:
m2o field text uses its base colour (blue)

After this commit:
m2o field text uses the colour red for danger decoration

closes odoo/odoo#116621

Forward-port-of: #115831
X-original-commit: 9e0eac2
Signed-off-by: Aaron Bohy (aab) <aab@odoo.com>

addons/web/static/src/views/fields/many2one/many2one_field.js

@@ -1,15 +1,16 @@
 /** @odoo-module **/
 
 import { browser } from "@web/core/browser/browser";
+import { isMobileOS } from "@web/core/browser/feature_detection";
 import { Dialog } from "@web/core/dialog/dialog";
-import { registry } from "@web/core/registry";
 import { _lt } from "@web/core/l10n/translation";
+import { evaluateExpr } from "@web/core/py_js/py";
+import { registry } from "@web/core/registry";
 import { useChildRef, useOwnedDialogs, useService } from "@web/core/utils/hooks";
 import { sprintf } from "@web/core/utils/strings";
-import { standardFieldProps } from "../standard_field_props";
 import { Many2XAutocomplete, useOpenMany2XRecord } from "@web/views/fields/relational_utils";
-import { isMobileOS } from "@web/core/browser/feature_detection";
 import * as BarcodeScanner from "@web/webclient/barcode/barcode_scanner";
+import { standardFieldProps } from "../standard_field_props";
 
 import { Component, onWillUpdateProps, useState } from "@odoo/owl";
 
@@ -61,6 +62,7 @@ export class Many2OneField extends Component {
         canScanBarcode: { type: Boolean, optional: true },
         update: { type: Function, optional: true },
         value: { optional: true },
+        decorations: { type: Object, optional: true },
     };
     static defaultProps = {
         canOpen: true,
@@ -73,6 +75,7 @@ export class Many2OneField extends Component {
         string: "",
         canScanBarcode: false,
         context: {},
+        decorations: {},
     };
 
     static SEARCH_MORE_LIMIT = 320;
@@ -160,6 +163,15 @@ export class Many2OneField extends Component {
     get context() {
         return this.props.context;
     }
+    get classFromDecoration() {
+        const evalContext = this.props.record.evalContext;
+        for (const decorationName in this.props.decorations) {
+            if (evaluateExpr(this.props.decorations[decorationName], evalContext)) {
+                return `text-${decorationName}`;
+            }
+        }
+        return "";
+    }
     get displayName() {
         return this.value ? this.value[1].split("\n")[0] : "";
     }
@@ -299,7 +311,7 @@ export const many2OneField = {
     component: Many2OneField,
     displayName: _lt("Many2one"),
     supportedTypes: ["many2one"],
-    extractProps({ attrs, options, string }, dynamicInfo) {
+    extractProps({ attrs, decorations, options, string }, dynamicInfo) {
         const canCreate =
             attrs.can_create && Boolean(JSON.parse(attrs.can_create)) && !options.no_create;
         return {
@@ -310,6 +322,7 @@ export const many2OneField = {
             canQuickCreate: canCreate && !options.no_quick_create,
             canCreateEdit: canCreate && !options.no_create_edit,
             context: dynamicInfo.context,
+            decorations,
             domain: dynamicInfo.domain,
             nameCreateField: options.create_name_field,
             canScanBarcode: !!options.can_scan_barcode,

addons/web/static/src/views/fields/many2one/many2one_field.xml

@@ -27,7 +27,7 @@
             <t t-else="">
                 <a
                     t-if="value"
-                    class="o_form_uri"
+                    t-attf-class="o_form_uri #{classFromDecoration}"
                     t-att-href="value ? `#id=${value[0]}&amp;model=${relation}` : '#'"
                     t-on-click.prevent="onClick"
                 >

addons/web/static/tests/views/fields/many2one_field_tests.js

@@ -775,6 +775,25 @@ QUnit.module("Fields", (hooks) => {
         }
     );
 
+    QUnit.test(
+        "using a many2one widget must take into account the decorations",
+        async function (assert) {
+            await makeView({
+                type: "list",
+                resModel: "partner",
+                serverData,
+                arch: `
+                <tree>
+                    <field name="user_id" decoration-danger="int_field > 9" widget="many2one"/>
+                    <field name="int_field"/>
+                </tree>`,
+            });
+
+            assert.containsOnce(target, ".o_list_many2one a.text-danger");
+            assert.containsN(target, ".o_data_row", 3);
+        }
+    );
+
     QUnit.test(
         "onchanges on many2ones trigger when editing record in form view",
         async function (assert) {