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>

2 files changed, 54 insertions, 0 deletions

diff --git a/src/webengine/doc/src/external-resources.qdoc b/src/webengine/doc/src/external-resources.qdoc
index c2faaa8d4..7ff6eea6b 100644
--- a/src/webengine/doc/src/external-resources.qdoc
+++ b/src/webengine/doc/src/external-resources.qdoc
@@ -141,3 +141,8 @@
     \externalpage https://wiki.greasespot.net/Metadata_Block#.40name
     \title Metadata Block
 */
+
+/*!
+    \externalpage https://developer.mozilla.org/en-US/docs/Web/API/Navigator/registerProtocolHandler
+    \title registerProtocolHandler
+*/
diff --git a/src/webengine/doc/src/webengineview_lgpl.qdoc b/src/webengine/doc/src/webengineview_lgpl.qdoc
index c6985b082..104397bf7 100644
--- a/src/webengine/doc/src/webengineview_lgpl.qdoc
+++ b/src/webengine/doc/src/webengineview_lgpl.qdoc
@@ -1357,6 +1357,55 @@
 */
 
 /*!
+    \qmlsignal WebEngineView::registerProtocolHandlerPermissionRequested(RegisterProtocolHandlerPermissionRequest request)
+    \since QtWebEngine 1.7
+
+    This signal is emitted when the web page tries to register a custom protocol
+    using the \l registerProtocolHandler API.
+
+    \sa RegisterProtocolHandlerPermissionRequest
+*/
+
+/*!
+    \qmltype RegisterProtocolHandlerPermissionRequest
+    \instantiates QQuickWebEngineRegisterProtocolHandlerPermissionRequest
+    \inqmlmodule QtWebEngine
+    \since QtWebEngine 1.7
+    \brief The RegisterProtocolHandlerPermissionRequest type enables accepting
+    or rejecting requests from the \l registerProtocolHandler API.
+
+    \sa WebEngineView::registerProtocolHandlerPermissionRequested()
+*/
+
+/*!
+    \qmlproperty url RegisterProtocolHandlerPermissionRequest::origin
+    \brief The URL template for the protocol handler.
+
+    This is the second parameter from the \l registerProtocolHandler call.
+*/
+
+/*!
+    \qmlproperty string RegisterProtocolHandlerPermissionRequest::protocol
+    \brief The URL scheme for the protocol handler.
+
+    This is the first parameter from the \l registerProtocolHandler call.
+*/
+
+/*!
+    \qmlmethod void RegisterProtocolHandlerPermissionRequest::accept()
+    \brief Accepts the request.
+
+    Subsequent calls to accept() and reject() are ignored.
+*/
+
+/*!
+    \qmlmethod void RegisterProtocolHandlerPermissionRequest::reject()
+    \brief Accepts the request.
+
+    Subsequent calls to accept() and reject() are ignored.
+*/
+
+/*!
     \qmlsignal WebEngineView::geometryChangeRequested(rect geometry, rect frameGeometry)
     \since QtWebEngine 1.7