LSessionLockRole Class Reference

Surface displayed during a session lock. More...

Inheritance diagram for LSessionLockRole:

Public Member Functions
	LSessionLockRole (const void *params) noexcept
	Constructor of the LSessionLockRole class. More...
	~LSessionLockRole ()=default
	Destructor of the LSessionLockRole class. More...
LOutput *	exclusiveOutput () const override
	The output the surface is assigned to. More...
virtual const LPoint &	rolePos () const override
	Surface position. More...
Public Member Functions inherited from LBaseSurfaceRole
	LBaseSurfaceRole (LFactoryObject::Type type, LResource *resource, LSurface *surface, UInt32 roleId) noexcept
	Constructor of LBaseSurfaceRole class. More...
	~LBaseSurfaceRole ()
	The LBaseSurfaceRole class destructor. More...
UInt32	roleId () const noexcept
	Role ID. More...
LSurface *	surface () const noexcept
	Returns the surface that has acquired the role provided in the constructor. More...
LResource *	resource () const
	Returns the Wayland resource for this role given in the constructor. More...
LClient *	client () const noexcept
	Client owner of the surface role. More...
Public Member Functions inherited from LFactoryObject
Type	factoryObjectType () const noexcept
	Gets the base factory object type. More...
Public Member Functions inherited from LObject
	LObject (const LObject &) noexcept
	Copy constructor. More...
LObject &	operator= (const LObject &) noexcept
	Assignment operator (each object has its own individual LWeak reference count). More...
void	setUserData (UIntPtr data) const noexcept
	Store an unsigned integer value/pointer. More...
UIntPtr	userData () const noexcept
	Retrieves the stored unsigned integer value/pointer. More...

Additional Inherited Members
Public Types inherited from LBaseSurfaceRole
enum	CommitOrigin
	Commit origin. More...
Public Types inherited from LFactoryObject
enum class	Type : Int32
	Base factory object types. More...
Protected Member Functions inherited from LBaseSurfaceRole
virtual bool	acceptCommitRequest (CommitOrigin origin)
	Asks if the surface commit should be processed. More...
virtual void	handleSurfaceBufferAttach (wl_resource *buffer, Int32 x, Int32 y)
	Notifies a new surface buffer attachment. More...
virtual void	handleSurfaceOffset (Int32 x, Int32 y)
	Notifies a surface buffer offset change. More...
virtual void	handleParentCommit ()
	Notifies a parent surface commit. More...
virtual void	handleParentMappingChange ()
	Notifies when the mapping state of the parent surface changes. More...
virtual void	handleParentChange ()
	Notifies when the parent surface changes. More...
Protected Member Functions inherited from LObject
	LObject () noexcept=default
	Constructor of the LObject class. More...
virtual	~LObject () noexcept
	Destructor of the LObject class. More...
void	notifyDestruction () noexcept
	Notifies the object destruction. More...
Protected Attributes inherited from LBaseSurfaceRole
LPoint	m_rolePos
	Variable that stores the surface position given the role. More...

Detailed Description

Surface displayed during a session lock.

LSessionLockRole is used by session-locking clients to display arbitrary graphics while the session is locked.

When a client requests to lock a session (see LSessionLockManager::lockRequest()), it first creates an LSessionLockRole for each initialized output, sized to match each output's dimensions (the size is then automatically adjusted when output dimensions change).

All surfaces with this role start off unmapped, they only become mapped if permission to lock the session is granted to the client. Subsequently, they are unmapped again when the session is unlocked.

Note

While the session is locked, only surfaces created by the locking client LSessionLockManager::client() should be rendered and receive input events.

If the client terminates before unlocking the session (see LSessionLockManager::DeadLocked), the session must remain locked, and a fallback mechanism should be employed to authenticate the user, such as relaunching the same locking client.

Constructor & Destructor Documentation

LSessionLockRole()

LSessionLockRole ( const void *  params )

noexcept

Constructor of the LSessionLockRole class.

Parameters

params

Internal parameters provided in LCompositor::createObjectRequest().

~LSessionLockRole()

~LSessionLockRole ( )

default

Destructor of the LSessionLockRole class.

Invoked after LCompositor::onAnticipatedObjectDestruction().

Member Function Documentation

exclusiveOutput()

LOutput* exclusiveOutput ( ) const

inlineoverridevirtual

The output the surface is assigned to.

Warning

It may return nullptr if the output is unplugged.

Reimplemented from LBaseSurfaceRole.

rolePos()

virtual const LPoint& rolePos ( ) const

overridevirtual

Surface position.

The default implementation returns the same position as the output it is assigned to.

Default Implementation

const LPoint &LSessionLockRole::rolePos() const
{
    if (exclusiveOutput())
        return exclusiveOutput()->pos();
 
    return surface()->pos();
}

Implements LBaseSurfaceRole.