From: Antonio Larrosa <alarrosa@suse.com>
Date: Mon, 30 Oct 2023 11:29:53 +0100
Subject: [PATCH] Inform users about the okular-spectre package

Show a message box informing the user that postscript support isn't
installed by default because of security reasons and what package
should be installed in order to let print preview and postscript
support work correctly.

Index: okular-23.08.2/part/part.cpp
===================================================================
--- okular-23.08.2.orig/part/part.cpp
+++ okular-23.08.2/part/part.cpp
@@ -1594,6 +1594,16 @@ bool Part::openFile()
     QMimeType mime;
     Document::OpenResult openResult = Document::OpenError;
     bool isCompressedFile = false;
+
+    if (!mimes.isEmpty() && mimes[0].inherits(QStringLiteral("application/postscript"))
+	&& !m_document->supportedMimeTypes().contains(QStringLiteral("application/postscript"))) {
+        KMessageBox::information(widget(),
+                                 i18n("Ghostscript is needed for the print preview and postscript support but it has security issues and is not installed by default.\n"
+                                      "If you only open trusted documents, you can install the 'okular-spectre' package."),
+                                 i18n("Postscript support package isn't installed"));
+	return false;
+    }
+
     while (!mimes.isEmpty() && openResult == Document::OpenError) {
         mime = mimes.takeFirst();
         openResult = doOpenFile(mime, fileNameToOpen, &isCompressedFile);