add useSubstitutions-conf for CJK

action.php

@@ -467,6 +467,10 @@ protected function generatePDF($cachefile, $event)
             $mpdf->showWatermarkText = true;
         }
 
+	if ($this->getExportConfig('useSubstitutions')) {
+		$mpdf->useSubstitutions = true;
+	}
+
         // load the template
         $template = $this->loadTemplate();
 
@@ -1030,6 +1034,8 @@ protected function loadExportConfig()
         $this->exportConfig['template'] = $tpl;
 
         $this->exportConfig['isDebug'] = $conf['allowdebug'] && $INPUT->has('debughtml');
+
+        $this->exportConfig['useSubstitutions'] = $this->getConf('useSubstitutions');
     }
 
     /**
@@ -1095,6 +1101,7 @@ public function addsvgbutton(Event $event)
         }
 
         array_splice($event->data['items'], -1, 0, [new MenuItem()]);
+        //array_splice($event->data['items'], -1, 0, [new MenuItemNS()]);
     }
 
     /**

conf/default.php

@@ -14,3 +14,4 @@
 $conf['usestyles']        = 'wrap,';
 $conf['qrcodescale']       = '1';
 $conf['showexportbutton'] = 1;
+$conf['useSubstitutions'] = 0;

conf/metadata.php

@@ -14,3 +14,4 @@
 $meta['usestyles']        = array('string');
 $meta['qrcodescale']       = array('string', '_pattern' => '/^(|\d+(\.\d+)?)$/');
 $meta['showexportbutton'] = array('onoff');
+$meta['useSubstitutions'] = array('onoff');

lang/en/settings.php

@@ -24,3 +24,4 @@
 $lang['usestyles']               = 'You can give a comma separated list of plugins of which the <code>style.css</code> or <code>screen.css</code> should be used for PDF generation. By default only <code>print.css</code> and <code>pdf.css</code> are used.';
 $lang['qrcodescale']             = 'Size scaling of the embedded QR code. Empty or <code>0</code> to disable.';
 $lang['showexportbutton']        = 'Show PDF export button (only when supported by your template)';
+$lang['useSubstitutions']        = 'Substitute missing characters in UTF-8(multibyte) documents - from other fonts';

lang/zh/settings.php

@@ -25,3 +25,4 @@
 $lang['usecache']              = '开启 PDF 文件缓存？内嵌的图片将不会受 ACL 权限限制。如果你担心安全问题，请将其禁用。';
 $lang['usestyles']             = 'PDF 生成过程中的 <code>style.css</code> 或者 <code>screen.css</code> ，以英文逗号,分割。默认只有<code>print.css</code> 和 <code>pdf.css</code> 被使用。';
 $lang['showexportbutton']      = '显示导出 PDF 按钮。（只有在模版支持并在白名单里的时候才能使用）';
+$lang['useSubstitutions']      = '从其他字体寻找并使用UTF-8（多字节）文档中丢失的字符';