W.I.P. of new approach for mail winmail.data attachment handling

- Fix mail list is loading super slow if there are mails with winmail.data attachments
- Performance improvement for reading mails in preview pane with winmail.data

mail/inc/class.mail_ui.inc.php

@@ -3658,6 +3658,38 @@ class mail_ui
 
 	}
 	
+	/**
+	 * ResolveWinmail fetches the encoded attachments
+	 * from winmail.data and will response expected structure back
+	 * to client in order to display them.
+	 *
+	 * Note: this ajax function should only be called via
+	 * nm mail selection as it does not support profile change
+	 * and uses the current available ic_server connection.
+	 *
+	 * @param type $_rowid row id from nm
+	 *
+	 */
+	function ajax_resolveWinmail ($_rowid)
+	{
+		$response = egw_json_response::get();
+		
+		$idParts = self::splitRowID($_rowid);
+		$uid = $idParts['msgUID'];
+		$mbox = $idParts['folder'];
+		
+		$attachments = $this->mail_bo->getMessageAttachments($uid, null, null, false,true,true,$mbox);
+		if (is_array($attachments))
+		{
+			$attachments = $this->createAttachmentBlock($attachments, $_rowid, $uid, $mbox, false);
+			$response->data($attachments);
+		}
+		else
+		{
+			$response->call('egw.message', lang('Can not resolve the winmail.data attachment!'));
+		}
+	}
+	
 	/**
 	 * move folder
 	 *

mail/js/app.js

@@ -844,6 +844,24 @@ app.classes.mail = AppJS.extend(
 		{
 			var _id = this.mail_fetchCurrentlyFocussed(selected);
 			dataElem = jQuery.extend(dataElem, egw.dataGetUIDdata(_id));
+			
+			// Try to resolve winmail.data attachment
+			if (dataElem.data && dataElem.data.attachmentsBlock[0]
+					&& dataElem.data.attachmentsBlock[0].winmailFlag)
+			{
+				attachmentArea.getDOMNode().classList.add('loading');
+				this.egw.jsonq('mail.mail_ui.ajax_resolveWinmail',[_id], function(_data){
+					attachmentArea.getDOMNode().classList.remove('loading');
+					if (typeof _data == 'object')
+					{
+						attachmentArea.set_value({content:_data});
+					}
+					else
+					{
+						console.log('Can not resolve the winmail.data!');
+					}
+				});
+			}
 		}
 
 		var $preview_iframe = jQuery('#mail-index_mailPreviewContainer');