1 files changed, 66 insertions, 0 deletions
diff --git a/addons/mail/static/src/bugfix/bugfix.js b/addons/mail/static/src/bugfix/bugfix.js
index 5a7474b5c59..d4128a9b236 100644
--- a/addons/mail/static/src/bugfix/bugfix.js
+++ b/addons/mail/static/src/bugfix/bugfix.js
@@ -8,3 +8,69 @@ odoo.define('mail/static/src/bugfix/bugfix.js', function (require) {
 'use strict';
 
 });
+
+// Should be moved to its own file in master.
+odoo.define('mail/static/src/component_hooks/use_update/use_update.js', function (require) {
+'use strict';
+
+const { Component } = owl;
+const { onMounted, onPatched } = owl.hooks;
+
+const executionQueue = [];
+
+function executeNextInQueue() {
+    if (executionQueue.length === 0) {
+        return;
+    }
+    const { component, func } = executionQueue.shift();
+    if (!component.__owl__.isDestroyed) {
+        func();
+    }
+    executeNextInQueue();
+}
+
+/**
+ * @param {Object} param0
+ * @param {Component} param0.component
+ * @param {function} param0.func
+ * @param {integer} param0.priority
+ */
+async function addFunctionToQueue({ component, func, priority }) {
+    const index = executionQueue.findIndex(item => item.priority > priority);
+    const item = { component, func, priority };
+    if (index === -1) {
+        executionQueue.push(item);
+    } else {
+        executionQueue.splice(index, 0, item);
+    }
+    // Timeout to allow all components to register their function before
+    // executing any of them, to respect all priorities.
+    await new Promise(resolve => setTimeout(resolve));
+    executeNextInQueue();
+}
+
+/**
+ * This hook provides support for executing code after update (render or patch).
+ *
+ * @param {Object} param0
+ * @param {function} param0.func the function to execute after the update.
+ * @param {integer} [param0.priority] determines the execution order of the function
+ *  among the update function of other components. Lower priority is executed
+ *  first. If no priority is given, the function is executed immediately.
+ */
+function useUpdate({ func, priority }) {
+    const component = Component.current;
+    onMounted(onUpdate);
+    onPatched(onUpdate);
+    function onUpdate() {
+        if (priority === undefined) {
+            func();
+            return;
+        }
+        addFunctionToQueue({ component, func, priority });
+    }
+}
+
+return useUpdate;
+
+});