--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mupdf-source/source/pdf/pdf-event.c	Mon Sep 15 11:43:07 2025 +0200
@@ -0,0 +1,164 @@
+// Copyright (C) 2004-2021 Artifex Software, Inc.
+//
+// This file is part of MuPDF.
+//
+// MuPDF is free software: you can redistribute it and/or modify it under the
+// terms of the GNU Affero General Public License as published by the Free
+// Software Foundation, either version 3 of the License, or (at your option)
+// any later version.
+//
+// MuPDF is distributed in the hope that it will be useful, but WITHOUT ANY
+// WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+// FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License for more
+// details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with MuPDF. If not, see <https://www.gnu.org/licenses/agpl-3.0.en.html>
+//
+// Alternative licensing terms are available from the licensor.
+// For commercial licensing, see <https://www.artifex.com/> or contact
+// Artifex Software, Inc., 39 Mesa Street, Suite 108A, San Francisco,
+// CA 94129, USA, for further information.
+
+#include "mupdf/fitz.h"
+#include "mupdf/pdf.h"
+
+typedef struct
+{
+	pdf_doc_event base;
+	pdf_alert_event alert;
+} pdf_alert_event_internal;
+
+pdf_alert_event *pdf_access_alert_event(fz_context *ctx, pdf_doc_event *evt)
+{
+	pdf_alert_event *alert = NULL;
+
+	if (evt->type == PDF_DOCUMENT_EVENT_ALERT)
+		alert = &((pdf_alert_event_internal *)evt)->alert;
+
+	return alert;
+}
+
+void pdf_event_issue_alert(fz_context *ctx, pdf_document *doc, pdf_alert_event *alert)
+{
+	if (doc->event_cb)
+	{
+		pdf_alert_event_internal ievent;
+		ievent.base.type = PDF_DOCUMENT_EVENT_ALERT;
+		ievent.alert = *alert;
+
+		doc->event_cb(ctx, doc, (pdf_doc_event *)&ievent, doc->event_cb_data);
+
+		*alert = ievent.alert;
+	}
+}
+
+void pdf_event_issue_print(fz_context *ctx, pdf_document *doc)
+{
+	pdf_doc_event e;
+
+	e.type = PDF_DOCUMENT_EVENT_PRINT;
+
+	if (doc->event_cb)
+		doc->event_cb(ctx, doc, &e, doc->event_cb_data);
+}
+
+typedef struct
+{
+	pdf_doc_event base;
+	const char *item;
+} pdf_exec_menu_item_event_internal;
+
+const char *pdf_access_exec_menu_item_event(fz_context *ctx, pdf_doc_event *evt)
+{
+	const char *item = NULL;
+
+	if (evt->type == PDF_DOCUMENT_EVENT_EXEC_MENU_ITEM)
+		item = ((pdf_exec_menu_item_event_internal *)evt)->item;
+
+	return item;
+}
+
+void pdf_event_issue_exec_menu_item(fz_context *ctx, pdf_document *doc, const char *item)
+{
+	if (doc->event_cb)
+	{
+		pdf_exec_menu_item_event_internal ievent;
+		ievent.base.type = PDF_DOCUMENT_EVENT_EXEC_MENU_ITEM;
+		ievent.item = item;
+
+		doc->event_cb(ctx, doc, (pdf_doc_event *)&ievent, doc->event_cb_data);
+	}
+}
+
+typedef struct
+{
+	pdf_doc_event base;
+	pdf_launch_url_event launch_url;
+} pdf_launch_url_event_internal;
+
+pdf_launch_url_event *pdf_access_launch_url_event(fz_context *ctx, pdf_doc_event *evt)
+{
+	pdf_launch_url_event *launch_url = NULL;
+
+	if (evt->type == PDF_DOCUMENT_EVENT_LAUNCH_URL)
+		launch_url = &((pdf_launch_url_event_internal *)evt)->launch_url;
+
+	return launch_url;
+}
+
+void pdf_event_issue_launch_url(fz_context *ctx, pdf_document *doc, const char *url, int new_frame)
+{
+	if (doc->event_cb)
+	{
+		pdf_launch_url_event_internal e;
+
+		e.base.type = PDF_DOCUMENT_EVENT_LAUNCH_URL;
+		e.launch_url.url = url;
+		e.launch_url.new_frame = new_frame;
+		doc->event_cb(ctx, doc, (pdf_doc_event *)&e, doc->event_cb_data);
+	}
+}
+
+typedef struct
+{
+	pdf_doc_event base;
+	pdf_mail_doc_event mail_doc;
+} pdf_mail_doc_event_internal;
+
+pdf_mail_doc_event *pdf_access_mail_doc_event(fz_context *ctx, pdf_doc_event *evt)
+{
+	pdf_mail_doc_event *mail_doc = NULL;
+
+	if (evt->type == PDF_DOCUMENT_EVENT_MAIL_DOC)
+		mail_doc = &((pdf_mail_doc_event_internal *)evt)->mail_doc;
+
+	return mail_doc;
+}
+
+void pdf_event_issue_mail_doc(fz_context *ctx, pdf_document *doc, pdf_mail_doc_event *evt)
+{
+	if (doc->event_cb)
+	{
+		pdf_mail_doc_event_internal e;
+
+		e.base.type = PDF_DOCUMENT_EVENT_MAIL_DOC;
+		e.mail_doc = *evt;
+
+		doc->event_cb(ctx, doc, (pdf_doc_event *)&e, doc->event_cb_data);
+	}
+}
+
+void pdf_set_doc_event_callback(fz_context *ctx, pdf_document *doc, pdf_doc_event_cb *event_cb, pdf_free_doc_event_data_cb *free_event_data_cb, void *data)
+{
+	if (doc->free_event_data_cb)
+		doc->free_event_data_cb(ctx, doc->event_cb_data);
+	doc->event_cb = event_cb;
+	doc->free_event_data_cb = free_event_data_cb;
+	doc->event_cb_data = data;
+}
+
+void *pdf_get_doc_event_callback_data(fz_context *ctx, pdf_document *doc)
+{
+	return doc->event_cb_data;
+}