From 33322e5c9bc047b474b4d9e88a629cb27651096d Mon Sep 17 00:00:00 2001
From: Laurent Montel <montel@kde.org>
Date: Thu, 16 Jul 2020 13:42:02 +0200
Subject: [PATCH] Register cidScheme

---
 src/CMakeLists.txt | 1 +
 src/main.cpp       | 8 ++++++++
 2 files changed, 9 insertions(+)

diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 20ca330b9..1b7e1dbf2 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -403,6 +403,7 @@ target_link_libraries(kmail
     KF5::TemplateParser
     KF5::Libkdepim
     KF5::Crash
+    KF5::WebEngineViewer
     ${kmail_userfeedback_LIB}
     )
 
diff --git a/src/main.cpp b/src/main.cpp
index 0f50a8eb3..1083474c7 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -33,10 +33,12 @@
 #include <QApplication>
 #include <QSessionManager>
 #include <KCrash>
+#include <QWebEngineUrlScheme>
 
 #ifdef WITH_KUSERFEEDBACK
 #include <KUserFeedback/Provider>
 #include "userfeedback/kmailuserfeedbackprovider.h"
+
 #endif
 
 //-----------------------------------------------------------------------------
@@ -124,6 +126,12 @@ int main(int argc, char *argv[])
     QCoreApplication::setAttribute(Qt::AA_ShareOpenGLContexts, true);
     QCoreApplication::setAttribute(Qt::AA_EnableHighDpiScaling, true);
     QCoreApplication::setAttribute(Qt::AA_UseHighDpiPixmaps, true);
+    //Necessary for "cid" support in kmail.
+    QWebEngineUrlScheme cidScheme("cid");
+    cidScheme.setFlags(QWebEngineUrlScheme::SecureScheme | QWebEngineUrlScheme::ContentSecurityPolicyIgnored);
+    cidScheme.setSyntax(QWebEngineUrlScheme::Syntax::Path);
+    QWebEngineUrlScheme::registerScheme(cidScheme);
+
     KMailApplication app(argc, &argv);
     KLocalizedString::setApplicationDomain("kmail");
     app.setWindowIcon(QIcon::fromTheme(QStringLiteral("kmail")));