[IMP] mail: introduce AttachmentViewer/onClickHeader

Task-2579306

Part-of: odoo/odoo#88152

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

@@ -284,17 +284,6 @@ export class AttachmentViewer extends Component {
         this._stopDragging();
     }
 
-    /**
-     * Called when clicking on the header. Stop propagation of event to prevent
-     * closing the dialog.
-     *
-     * @private
-     * @param {MouseEvent} ev
-     */
-    _onClickHeader(ev) {
-        ev.stopPropagation();
-    }
-
     /**
      * Called when clicking on image. Stop propagation of event to prevent
      * closing the dialog.

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

@@ -4,7 +4,7 @@
     <t t-name="mail.AttachmentViewer" owl="1">
         <t t-if="attachmentViewer">
             <div class="o_AttachmentViewer flex-column align-items-center d-flex w-100 h-100" t-attf-class="{{ className }}" t-on-click="attachmentViewer.onClick" t-on-keydown="_onKeydown" tabindex="0" t-ref="root">
-                <div class="o_AttachmentViewer_header d-flex w-100 bg-black-75 text-400" t-on-click="_onClickHeader">
+                <div class="o_AttachmentViewer_header d-flex w-100 bg-black-75 text-400" t-on-click="attachmentViewer.onClickHeader">
                     <t t-if="attachmentViewer.attachment.isViewable">
                         <div class="o_AttachmentViewer_headerItem o_AttachmentViewer_icon d-flex align-items-center ms-4 me-2">
                             <t t-if="attachmentViewer.attachment.isImage">

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

@@ -52,6 +52,15 @@ registerModel({
             ev.stopPropagation();
             this.attachment.download();
         },
+        /**
+         * Called when clicking on the header. Stop propagation of event to prevent
+         * closing the dialog.
+         *
+         * @param {MouseEvent} ev
+         */
+        onClickHeader(ev) {
+            ev.stopPropagation();
+        },
         /**
          * @private
          * @returns {string}