IMP_Compose::canUploadAttachment PHP Method

    public static function canUploadAttachment()
    {
        return self::maxAttachmentSize() != 0;
    }

 /**
  */
 protected function _initPages()
 {
     global $injector, $registry, $session;
     $imp_imap = $injector->getInstance('IMP_Factory_Imap')->create();
     $this->view->allowFolders = $imp_imap->access(IMP_Imap::ACCESS_FOLDERS);
     $this->view->canInnocent = !empty($imp_imap->config->innocent_params);
     $this->view->canSearch = $imp_imap->access(IMP_Imap::ACCESS_SEARCH);
     $this->view->canSpam = !empty($imp_imap->config->spam_params);
     if ($this->view->canCompose = IMP_Compose::canCompose()) {
         /* Setting up identities. */
         $identity = $injector->getInstance('IMP_Identity');
         $this->view->identities = array();
         foreach ($identity->getSelectList() as $id => $from) {
             $this->view->identities[] = array('label' => $from, 'sel' => $id == $identity->getDefault(), 'val' => $id);
         }
         $this->view->user = $registry->getAuth();
         $this->view->draft = $imp_imap->access(IMP_Imap::ACCESS_DRAFTS) && ($draft = IMP_Mailbox::getPref(IMP_Mailbox::MBOX_DRAFTS)) && !$draft->readonly;
         if (IMP_Compose::canUploadAttachment()) {
             $this->view->attach = true;
             $this->view->max_size = $session->get('imp', 'file_upload');
         }
     }
 }