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4c4ce2f899
The former implementation did not internally track ROM changes notified vs. delivered to the client. We adapt the versioning implementation implemented in dynamic_rom_session.h and enable explicit notification of the current version. The feature is used by the clipboard to notify permitted readers of the clipboard ROM service on focus change via the newly created private Rom::Module::_notify_permitted_readers() function. Fixes #4274
Pointer for Nitpicker with optional hover-sensitive shape support Per default the standard "big mouse" pointer is rendered on screen. Additionally, 'pointer' supports to render "pointer shapes" when hovering Nitpicker sessions for which a shape was reported. This feature must be enabled with the '<config shapes="yes"/>' option. When enabled, the 'pointer' component announces a 'Report' service for custom pointer shapes and requests ROM sessions for Nitpicker's 'hover' and 'xray' reports. The mapping between hovered Nitpicker sessions and applications can be achieved with report session label rewriting: ! <start name="shape-arrow"> ! <binary name="test-pointer"/> ! <resource name="RAM" quantum="2M"/> ! <config shape="arrow"/> ! <route> ! <service name="PD"> <parent/> </service> ! <service name="ROM"> <parent/> </service> ! <service name="CPU"> <parent/> </service> ! <service name="LOG"> <parent/> </service> ! <service name="Report" label="shape"> ! <child name="pointer" label="test-label-arrow -> shape"/> ! </service> ! </route> ! </start> In the example above, which is from 'pointer.run', the 'shape-arrow' component reports an arrow shape with the label "shape". By rewriting the label of the report, the shape will be drawn for the 'test-label-arrow' component when its Nitpicker view is hovered. Technically, the 'pointer' component compares the hovered label, which is 'test-label-arrow -> testnit' in this case, with the shape report label after stripping the last element of each label, so the remaining label prefix 'test-label-arrow' is the actual match criteria. When configured with '<config shapes="yes" verbose="yes"/>', the 'pointer' component prints the labels of hovered Nitpicker sessions and received shape reports to the 'LOG' service. The most common use cases for pointer shapes are VirtualBox, which reports the guest-pointer shapes if Guest Additions are installed, and Qt applications.