[IMP] mail: turn 'ComposerView/hasFooter' into field

Task-2793280

closes odoo/odoo#86468

Signed-off-by: Alexandre Kühn (aku) <aku@odoo.com>

addons/mail/static/src/components/composer/composer.js

@@ -34,23 +34,6 @@ export class Composer extends Component {
         return this.messaging && this.messaging.models['ComposerView'].get(this.props.localId);
     }
 
-    /**
-     * Determine whether composer should display a footer.
-     *
-     * @returns {boolean}
-     */
-    get hasFooter() {
-        if (!this.composerView) {
-            return false;
-        }
-        return (
-            this.composerView.hasThreadTyping ||
-            this.composerView.composer.attachments.length > 0 ||
-            this.composerView.messageViewInEditing ||
-            !this.composerView.isCompact
-        );
-    }
-
     /**
      * Determine whether the composer should display a header.
      *

addons/mail/static/src/components/composer/composer.xml

@@ -6,7 +6,7 @@
             t-att-class="{
                 'o-focused': composerView and composerView.isFocused,
                 'o-has-current-partner-avatar': props.hasCurrentPartnerAvatar,
-                'o-has-footer': hasFooter,
+                'o-has-footer': composerView and composerView.hasFooter,
                 'o-has-header': hasHeader,
                 'o-is-in-thread-view': composerView and composerView.threadView,
                 'o-is-compact': composerView and composerView.isCompact,
@@ -116,7 +116,7 @@
                         </t>
                     </div>
                 </div>
-                <t t-if="hasFooter">
+                <t t-if="composerView.hasFooter">
                     <div class="o_Composer_coreFooter" t-att-class="{ 'o-composer-is-compact': composerView.isCompact }">
                         <t t-if="composerView.hasThreadTyping">
                             <ThreadTextualTypingStatus className="'o_Composer_threadTextualTypingStatus'" threadLocalId="composerView.composer.activeThread.localId"/>

addons/mail/static/src/models/composer_view.js

@@ -577,6 +577,18 @@ registerModel({
             }
             return clear();
         },
+        /**
+         * @private
+         * @returns {boolean}
+         */
+        _computeHasFooter() {
+            return Boolean(
+                this.hasThreadTyping ||
+                this.composer.attachments.length > 0 ||
+                this.messageViewInEditing ||
+                !this.isCompact
+            );
+        },
         /**
          * @private
          * @return {boolean}
@@ -1035,6 +1047,12 @@ registerModel({
             compute: '_computeHasFollowers',
             default: false,
         }),
+        /**
+         * Determines whether composer should display a footer.
+         */
+        hasFooter: attr({
+            compute: '_computeHasFooter',
+        }),
         /**
          * States whether there is any result currently found for the current
          * suggestion delimiter and search term, if applicable.