Add support for registerProtocolHandler

Extend initialization of URLRequestContextGetterQt to create a
content::ProtocolHandlerRegistry for each content::BrowserContext and add the
registry's URL request interceptor to the front of the interceptor chain.

Implement methods in WebContentsDelegateQt to add/remove protocol handlers
to/from the ProtocolHandlerRegistry.

Add permission request signal and classes for core, quick and widgets.

Add widgets autotest.

Add signal handlers to quicknanobrowser and simplebrowser.

Task-number: QTBUG-62783
Change-Id: I808e7eb9a1cb4d7216686deed4895de14fe46310
Reviewed-by: Allan Sandfeld Jensen <allan.jensen@qt.io>

6 files changed, 213 insertions, 0 deletions

diff --git a/src/webenginewidgets/api/qwebenginepage.cpp b/src/webenginewidgets/api/qwebenginepage.cpp
index 67d55b20f..ec35ea6ce 100644
--- a/src/webenginewidgets/api/qwebenginepage.cpp
+++ b/src/webenginewidgets/api/qwebenginepage.cpp
@@ -54,6 +54,7 @@
 #include "qwebengineprofile.h"
 #include "qwebengineprofile_p.h"
 #include "qwebenginequotapermissionrequest.h"
+#include "qwebengineregisterprotocolhandlerpermissionrequest.h"
 #include "qwebenginescriptcollection_p.h"
 #include "qwebenginesettings.h"
 #include "qwebengineview.h"
@@ -578,6 +579,13 @@ void QWebEnginePagePrivate::runQuotaPermissionRequest(QSharedPointer<QtWebEngine
     Q_EMIT q->quotaPermissionRequested(request);
 }
 
+void QWebEnginePagePrivate::runRegisterProtocolHandlerPermissionRequest(QSharedPointer<RegisterProtocolHandlerPermissionController> controller)
+{
+    Q_Q(QWebEnginePage);
+    QWebEngineRegisterProtocolHandlerPermissionRequest request(std::move(controller));
+    Q_EMIT q->registerProtocolHandlerPermissionRequested(request);
+}
+
 QObject *QWebEnginePagePrivate::accessibilityParentObject()
 {
     return view;
@@ -750,6 +758,18 @@ QWebEnginePage::QWebEnginePage(QObject* parent)
 */
 
 /*!
+    \fn QWebEnginePage::registerProtocolHandlerPermissionRequested(QWebEngineRegisterProtocolHandlerPermissionRequest request)
+    \since 5.11
+
+    This signal is emitted when the web page tries to register a custom protocol
+    using the \l registerProtocolHandler API.
+
+    The request object \a request can be used to accept or reject the request:
+
+    \snippet webenginewidgets/simplebrowser/webpage.cpp registerProtocolHandlerPermissionRequested
+*/
+
+/*!
     \fn void QWebEnginePage::pdfPrintingFinished(const QString &filePath, bool success)
     \since 5.9
 
diff --git a/src/webenginewidgets/api/qwebenginepage.h b/src/webenginewidgets/api/qwebenginepage.h
index 7ce72258b..d716765fe 100644
--- a/src/webenginewidgets/api/qwebenginepage.h
+++ b/src/webenginewidgets/api/qwebenginepage.h
@@ -66,6 +66,7 @@ class QWebEnginePage;
 class QWebEnginePagePrivate;
 class QWebEngineProfile;
 class QWebEngineQuotaPermissionRequest;
+class QWebEngineRegisterProtocolHandlerPermissionRequest;
 class QWebEngineScriptCollection;
 class QWebEngineSettings;
 
@@ -338,6 +339,7 @@ Q_SIGNALS:
     void featurePermissionRequestCanceled(const QUrl &securityOrigin, QWebEnginePage::Feature feature);
     void fullScreenRequested(QWebEngineFullScreenRequest fullScreenRequest);
     void quotaPermissionRequested(QWebEngineQuotaPermissionRequest quotaPermissionRequest);
+    void registerProtocolHandlerPermissionRequested(QWebEngineRegisterProtocolHandlerPermissionRequest request);
 
     void authenticationRequired(const QUrl &requestUrl, QAuthenticator *authenticator);
     void proxyAuthenticationRequired(const QUrl &requestUrl, QAuthenticator *authenticator, const QString &proxyHost);
diff --git a/src/webenginewidgets/api/qwebenginepage_p.h b/src/webenginewidgets/api/qwebenginepage_p.h
index 301028e39..61092fa6a 100644
--- a/src/webenginewidgets/api/qwebenginepage_p.h
+++ b/src/webenginewidgets/api/qwebenginepage_p.h
@@ -130,6 +130,7 @@ public:
     void runGeolocationPermissionRequest(const QUrl &securityOrigin) override;
     void runMouseLockPermissionRequest(const QUrl &securityOrigin) override;
     void runQuotaPermissionRequest(QSharedPointer<QtWebEngineCore::QuotaPermissionController>) override;
+    void runRegisterProtocolHandlerPermissionRequest(QSharedPointer<QtWebEngineCore::RegisterProtocolHandlerPermissionController>) override;
     QObject *accessibilityParentObject() override;
     QtWebEngineCore::WebEngineSettings *webEngineSettings() const override;
     void allowCertificateError(const QSharedPointer<CertificateErrorController> &controller) override;
diff --git a/src/webenginewidgets/api/qwebengineregisterprotocolhandlerpermissionrequest.cpp b/src/webenginewidgets/api/qwebengineregisterprotocolhandlerpermissionrequest.cpp
new file mode 100644
index 000000000..ad1398daf
--- /dev/null
+++ b/src/webenginewidgets/api/qwebengineregisterprotocolhandlerpermissionrequest.cpp
@@ -0,0 +1,115 @@
+/****************************************************************************
+**
+** Copyright (C) 2018 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the QtWebEngine module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 3 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL3 included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 3 requirements
+** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 2.0 or (at your option) the GNU General
+** Public license version 3 or any later version approved by the KDE Free
+** Qt Foundation. The licenses are as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-2.0.html and
+** https://www.gnu.org/licenses/gpl-3.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qwebengineregisterprotocolhandlerpermissionrequest.h"
+
+#include "register_protocol_handler_permission_controller.h"
+
+QT_BEGIN_NAMESPACE
+
+/*!
+    \class QWebEngineRegisterProtocolHandlerPermissionRequest
+    \inmodule QtWebEngineWidgets
+    \since 5.11
+    \brief The QWebEngineRegisterProtocolHandlerPermissionRequest type enables
+    accepting or rejecting requests from the \l registerProtocolHandler API.
+
+    \sa QWebEnginePage::registerProtocolHandlerPermissionRequested
+*/
+
+static void registerMetaTypes()
+{
+    qRegisterMetaType<QWebEngineRegisterProtocolHandlerPermissionRequest>();
+}
+
+Q_CONSTRUCTOR_FUNCTION(registerMetaTypes)
+
+/*! \fn QWebEngineRegisterProtocolHandlerPermissionRequest::QWebEngineRegisterProtocolHandlerPermissionRequest()
+    \internal
+*/
+
+/*! \internal */
+QWebEngineRegisterProtocolHandlerPermissionRequest::QWebEngineRegisterProtocolHandlerPermissionRequest(
+    QSharedPointer<QtWebEngineCore::RegisterProtocolHandlerPermissionController> d_ptr)
+    : d_ptr(std::move(d_ptr))
+{}
+
+/*!
+    Rejects the request.
+
+    Subsequent calls to accept() and reject() are ignored.
+*/
+void QWebEngineRegisterProtocolHandlerPermissionRequest::reject()
+{
+    d_ptr->reject();
+}
+
+/*!
+    Accepts the request
+
+    Subsequent calls to accept() and reject() are ignored.
+*/
+void QWebEngineRegisterProtocolHandlerPermissionRequest::accept()
+{
+    d_ptr->accept();
+}
+
+/*!
+    \property QWebEngineRegisterProtocolHandlerPermissionRequest::origin
+    \brief The URL template for the protocol handler.
+
+    This is the second parameter from the \l registerProtocolHandler call.
+*/
+QUrl QWebEngineRegisterProtocolHandlerPermissionRequest::origin() const
+{
+    return d_ptr->origin();
+}
+
+/*!
+    \property QWebEngineRegisterProtocolHandlerPermissionRequest::protocol
+    \brief The URL scheme for the protocol handler.
+
+    This is the first parameter from the \l registerProtocolHandler call.
+*/
+QString QWebEngineRegisterProtocolHandlerPermissionRequest::protocol() const
+{
+    return d_ptr->protocol();
+}
+
+QT_END_NAMESPACE
diff --git a/src/webenginewidgets/api/qwebengineregisterprotocolhandlerpermissionrequest.h b/src/webenginewidgets/api/qwebengineregisterprotocolhandlerpermissionrequest.h
new file mode 100644
index 000000000..592eabb34
--- /dev/null
+++ b/src/webenginewidgets/api/qwebengineregisterprotocolhandlerpermissionrequest.h
@@ -0,0 +1,73 @@
+/****************************************************************************
+**
+** Copyright (C) 2018 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the QtWebEngine module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 3 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL3 included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 3 requirements
+** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 2.0 or (at your option) the GNU General
+** Public license version 3 or any later version approved by the KDE Free
+** Qt Foundation. The licenses are as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-2.0.html and
+** https://www.gnu.org/licenses/gpl-3.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QWEBENGINEREGISTERPROTOCOLHANDLERPERMISSIONREQUEST_H
+#define QWEBENGINEREGISTERPROTOCOLHANDLERPERMISSIONREQUEST_H
+
+#include <QtCore/qsharedpointer.h>
+#include <QtCore/qurl.h>
+#include <QtWebEngineWidgets/qtwebenginewidgetsglobal.h>
+
+namespace QtWebEngineCore {
+    class RegisterProtocolHandlerPermissionController;
+}
+
+QT_BEGIN_NAMESPACE
+
+class QWEBENGINEWIDGETS_EXPORT QWebEngineRegisterProtocolHandlerPermissionRequest {
+    Q_GADGET
+    Q_PROPERTY(QUrl origin READ origin CONSTANT FINAL)
+    Q_PROPERTY(QString protocol READ protocol CONSTANT FINAL)
+public:
+    QWebEngineRegisterProtocolHandlerPermissionRequest() {}
+    QWebEngineRegisterProtocolHandlerPermissionRequest(
+        QSharedPointer<QtWebEngineCore::RegisterProtocolHandlerPermissionController>);
+    Q_INVOKABLE void accept();
+    Q_INVOKABLE void reject();
+    QUrl origin() const;
+    QString protocol() const;
+
+private:
+    QSharedPointer<QtWebEngineCore::RegisterProtocolHandlerPermissionController> d_ptr;
+};
+
+QT_END_NAMESPACE
+Q_DECLARE_METATYPE(QWebEngineRegisterProtocolHandlerPermissionRequest)
+
+#endif // QWEBENGINEREGISTERPROTOCOLHANDLERPERMISSIONREQUEST_H
diff --git a/src/webenginewidgets/webenginewidgets.pro b/src/webenginewidgets/webenginewidgets.pro
index 37cb7a1f0..c3132b640 100644
--- a/src/webenginewidgets/webenginewidgets.pro
+++ b/src/webenginewidgets/webenginewidgets.pro
@@ -20,6 +20,7 @@ SOURCES = \
         api/qwebenginepage.cpp \
         api/qwebengineprofile.cpp \
         api/qwebenginequotapermissionrequest.cpp \
+        api/qwebengineregisterprotocolhandlerpermissionrequest.cpp \
         api/qwebenginescript.cpp \
         api/qwebenginescriptcollection.cpp \
         api/qwebenginesettings.cpp \
@@ -39,6 +40,7 @@ HEADERS = \
         api/qwebengineprofile.h \
         api/qwebengineprofile_p.h \
         api/qwebenginequotapermissionrequest.h \
+        api/qwebengineregisterprotocolhandlerpermissionrequest.h \
         api/qwebenginescriptcollection.h \
         api/qwebenginescriptcollection_p.h \
         api/qwebenginesettings.h \