QTextDocument and the text editor classes suggest to override their loadResource() methods to provide data associated with a text document. This approach has the following drawbacks: - it requires subclassing - there is no way to set a global resource provider - QLabel is missing virtual loadResource() method and it can't be added without breaking ABI QUrlResourceProvider is designed to solve these issues. One should create a derived class that implements QUrlResourceProvider::resource(). The objects of the derived class then can be set for any text document. The default resource provider can be set with QUrlResourceProvider::setDefaultProvider(). This change also adds QLabel::setResourceProvider(), which doesn't break ABI. [ChangeLog][QtGui][Text] Introduced QUrlResourceProvider that allows to load resources for HTML. It is intended to replace the use of QTextDocument::loadResource(). Change-Id: Iaf19b229f522a73508f20715257450fe58f68daf Reviewed-by: Konstantin Ritt <ritt.ks@gmail.com> Reviewed-by: Lars Knoll <lars.knoll@qt.io>