Don't throw an exception on platforms with no permission API

Using the permission API without guards for Android cause exception
on all other platforms, instead we can print a warning with the same
message if QT_DEBUG is defined to also make it less confusing for other
platforms.

Also, return QPermission::Authorized by default for platforms with no
implementation to this API.

Change-Id: Ie01a6a7f8b6a066685d32c861a56e9ded2c06410
Reviewed-by: Sona Kurazyan <sona.kurazyan@qt.io>
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@qt.io>

1 files changed, 21 insertions, 8 deletions

diff --git a/src/corelib/kernel/qcoreapplication.cpp b/src/corelib/kernel/qcoreapplication.cpp
index bb874569ab..0cb7f30644 100644
--- a/src/corelib/kernel/qcoreapplication.cpp
+++ b/src/corelib/kernel/qcoreapplication.cpp
@@ -3085,14 +3085,11 @@ void QCoreApplication::setEventDispatcher(QAbstractEventDispatcher *eventDispatc
         QPromise<QPermission::PermissionResult> promise;
         QFuture<QPermission::PermissionResult> future = promise.future();
         promise.start();
-    #ifndef QT_NO_EXCEPTIONS
-        const auto exception = std::make_exception_ptr(
-                    std::runtime_error("This platform doesn't have an implementation "
-                                       "for the application permissions API."));
-        promise.setException(exception);
-    #else
-        promise.addResult(QPermission::Denied);
-    #endif
+#if defined(QT_DEBUG)
+        qWarning() << "This platform doesn't have an implementation"
+                   << "for the application permissions API.";
+#endif
+        promise.addResult(QPermission::Authorized);
         promise.finish();
         return future;
     }
@@ -3144,6 +3141,10 @@ void QCoreApplication::setEventDispatcher(QAbstractEventDispatcher *eventDispatc
 
     \snippet permissions/permissions.cpp Request camera permission sync
 
+    \note Any platform that doesn't have an implementation for this API,
+    returns QPermission::Authorized by default. Currently, only Android
+    has an implemtation for this API.
+
     \since 6.2
     \sa checkPermission()
 */
@@ -3172,6 +3173,10 @@ QCoreApplication::requestPermission(QPermission::PermisionType permission)
 
     \snippet permissions/permissions.cpp Request camera permission sync on Android
 
+    \note Any platform that doesn't have an implementation for this API,
+    returns QPermission::Authorized by default. Currently, only Android
+    has an implemtation for this API.
+
     \since 6.2
     \sa checkPermission()
 */
@@ -3194,6 +3199,10 @@ QCoreApplication::requestPermission(const QString &permission)
 
     \snippet permissions/permissions.cpp Check camera permission sync
 
+    \note Any platform that doesn't have an implementation for this API,
+    returns QPermission::Authorized by default. Currently, only Android
+    has an implemtation for this API.
+
     \since 6.2
     \sa requestPermission()
 */
@@ -3217,6 +3226,10 @@ QCoreApplication::checkPermission(QPermission::PermisionType permission)
 
     \snippet permissions/permissions.cpp Check camera permission sync on Android
 
+    \note Any platform that doesn't have an implementation for this API,
+    returns QPermission::Authorized by default. Currently, only Android
+    has an implemtation for this API.
+
     \since 6.2
     \sa requestPermission()
 */