[FIX] web: legacy list switches view to form with the right resIds

Have a legacy list view, click on a record to open it in a new (WOWL) form view
Before this commit, the pager was wrong, as we never passed the list's current resIds
to the form.

After this commit, the pager of the wowl form view is correct.

closes odoo/odoo#96123

Signed-off-by: Lucas Perais (lpe) <lpe@odoo.com>

addons/web/static/src/legacy/action_adapters.js

@@ -381,7 +381,11 @@ export class ViewAdapter extends ActionAdapter {
         if (ev.name === "switch_view") {
             if (payload.view_type === "form") {
                 if (payload.res_id) {
-                    return this.props.selectRecord(payload.res_id, { mode: payload.mode });
+                    const activeIds = this.__widget.model.get(this.__widget.handle).res_ids;
+                    return this.props.selectRecord(payload.res_id, {
+                        mode: payload.mode,
+                        activeIds,
+                    });
                 } else {
                     return this.props.createRecord();
                 }

addons/web/static/tests/webclient/actions/legacy_tests.js

@@ -24,6 +24,7 @@ import { ClientActionAdapter, ViewAdapter } from "@web/legacy/action_adapters";
 import { makeLegacyCrashManagerService } from "@web/legacy/utils";
 import { useDebugCategory } from "@web/core/debug/debug_context";
 import { ErrorDialog } from "@web/core/errors/error_dialogs";
+import * as cpHelpers from "@web/../tests/search/helpers";
 
 import AbstractView from "web.AbstractView";
 import ControlPanel from "web.ControlPanel";
@@ -742,4 +743,34 @@ QUnit.module("ActionManager", (hooks) => {
         await legacyExtraNextTick();
         assert.containsOnce(target, ".o_legacy_form_view");
     });
+
+    QUnit.test("correct pager when coming from list (legacy)", async (assert) => {
+        assert.expect(4);
+
+        registry.category("views").remove("list");
+        legacyViewRegistry.add("list", ListView);
+        serverData.views = {
+            "partner,false,search": `<search />`,
+            "partner,99,list": `<list limit="4"><field name="display_name" /></list>`,
+            "partner,100,form": `<form><field name="display_name" /></form>`,
+        };
+
+        const wc = await createWebClient({ serverData });
+        await doAction(wc, {
+            res_model: "partner",
+            type: "ir.actions.act_window",
+            views: [
+                [99, "list"],
+                [100, "form"],
+            ],
+        });
+
+        assert.deepEqual(cpHelpers.getPagerValue(target), [1, 4]);
+        assert.deepEqual(cpHelpers.getPagerLimit(target), 5);
+
+        await click(target, ".o_data_row:nth-child(2) .o_data_cell");
+        await legacyExtraNextTick();
+        assert.deepEqual(cpHelpers.getPagerValue(target), [2]);
+        assert.deepEqual(cpHelpers.getPagerLimit(target), 4);
+    });
 });