From f697abe9a1351c2007c9c2bd9eb7a1b5d8b9b5d5 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Magnus=20Gro=C3=9F?= <magnus.gross@rwth-aachen.de>
Date: Fri, 26 Jun 2020 11:41:53 +0200
Subject: [PATCH] Do not open non-images as image

QImageReader might report PDF as a viable image type, if Qt is
dynamically linked and QtWebEngine is installed.

Fixed by additionally checking the mime type.

Fixes #8102
---
 Telegram/SourceFiles/data/data_document.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Telegram/SourceFiles/data/data_document.cpp b/Telegram/SourceFiles/data/data_document.cpp
index 8d198bd3a0..994b0e6fa0 100644
--- a/Telegram/SourceFiles/data/data_document.cpp
+++ b/Telegram/SourceFiles/data/data_document.cpp
@@ -322,7 +322,7 @@ void DocumentOpenClickHandler::Open(
 				location.accessDisable();
 			});
 			const auto path = location.name();
-			if (QImageReader(path).canRead()) {
+			if (Core::MimeTypeForFile(path).name().startsWith("image/") && QImageReader(path).canRead()) {
 				Core::App().showDocument(data, context);
 				return;
 			}