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CLinkedTypefaceSpecification Class Reference

class CLinkedTypefaceSpecification : public CBase

This class contains the specification of a linked typeface. It is made up of groups and typefaces.

Groups (CLinkedTypefaceGroup) must contain one or more typeface; the attributes of the group control how the rasterizer draws the typefaces within the group.

Typefaces (CLinkedTypefaceElementSpec) specify which individual typefaces make up the linked typeface. These are referred to as "elements" of the linked typeface.

Once the linked typeface has been created users can use it as if it were any other typeface assuming there is a rasteriser that supports this feature available. When selecting a character the rasterize searches each typeface in turn from the lowest index to the highest. When drawing text, the first typeface to contain the required character is used.

KMaxLinkedTypefaces and KMaxLinkedTypefaceGroups define the maximum number of typefaces and groups that can be added to the specification.

This class is not thread safe.

WARNING: Class for internal and partner use ONLY. Compatibility is not guaranteed in future releases.

CLinkedTypefaceElementSpec CLinkedTypefaceGroup KLinkedMaxTypefaces KMaxLinkedTypefaceGroups

Inherits from

CLinkedTypefaceSpecification
- CBase

Public Member Functions
	~CLinkedTypefaceSpecification()
IMPORT_C void	AddLinkedTypefaceGroupL(CLinkedTypefaceGroup &)
IMPORT_C void	AddTypefaceAtBackL(CLinkedTypefaceElementSpec &)
IMPORT_C void	AddTypefaceAtIndexL(CLinkedTypefaceElementSpec &, TInt)
IMPORT_C TInt	CanonicalIndex()
IMPORT_C void	Clear()
IMPORT_C void	FetchLinkedTypefaceSpecificationL(CFbsTypefaceStore &)
IMPORT_C CLinkedTypefaceGroup *	Group(TInt)
IMPORT_C CLinkedTypefaceGroup *	GroupById(TInt)
IMPORT_C TInt	GroupCount()
IMPORT_C TPtrC	Name()
IMPORT_C CLinkedTypefaceSpecification *	NewLC(const TDesC &)
IMPORT_C void	RegisterLinkedTypefaceL(CFbsTypefaceStore &)
IMPORT_C TInt	RemoveLinkedTypefaceGroup(TInt)
IMPORT_C TInt	RemoveTypeface(TInt)
IMPORT_C CLinkedTypefaceElementSpec *	Typeface(TInt)
IMPORT_C TInt	TypefaceCount()
IMPORT_C void	UpdateLinkedTypefaceL(CFbsTypefaceStore &)

Private Member Functions
	CLinkedTypefaceSpecification()
void	ConstructL(const TDesC &)
void	DoAddTypefaceL(CLinkedTypefaceElementSpec &, TInt)

Inherited Functions
	CBase::CBase()
	CBase::Delete(CBase *)
	CBase::Extension_(TUint,TAny &,TAny )
	CBase::operator new(TUint)
	CBase::operator new(TUint,TAny *)
	CBase::operator new(TUint,TLeave)
	CBase::operator new(TUint,TLeave,TUint)
	CBase::operator new(TUint,TUint)
	CBase::~CBase()

Private Attributes
CLinkedTypefaceSpecificationBody *	iBody

Constructor & Destructor Documentation

CLinkedTypefaceSpecification()

CLinkedTypefaceSpecification

(

)

[private]

~CLinkedTypefaceSpecification()

IMPORT_C

~CLinkedTypefaceSpecification

(

)

Default destructor

Member Functions Documentation

AddLinkedTypefaceGroupL(CLinkedTypefaceGroup &)

IMPORT_C void

AddLinkedTypefaceGroupL

(

CLinkedTypefaceGroup &

aGroup

)

Adds the group specified to this specification. The specification takes ownership of the group if addition is successful.

CLinkedTypefaceSpecification::RemoveLinkedTypefaceGroup()

leave: KErrAlreadyExists A group with the same ID is already present in the specification

Parameters

CLinkedTypefaceGroup & aGroup

The group to be added

AddTypefaceAtBackL(CLinkedTypefaceElementSpec &)

IMPORT_C void

AddTypefaceAtBackL

(

CLinkedTypefaceElementSpec &

aElementSpec

)

Adds the supplied CLinkedTypefaceElementSpec to the Linked Typeface specification. The element is placed at the back of the specification. Adding a canonical element will only be successful if one has not already been added. The specification takes ownership of the element specification if adding is successful.

CLinkedTypefaceSpecification::AddTypefaceAtIndexL() CLinkedTypefaceSpecification::RemoveTypeface() KMaxLinkedTypefaces

leave: KErrArgument If the element is canonical and a canonical element already exists or if the group ID doesn't exist

leave: KErrNoMemory There was not enough memory available to perform this operation

leave: KErrOverflow The typeface specification is full; adding would exceed KMaxLinkedTypefaces

Parameters

CLinkedTypefaceElementSpec & aElementSpec

AddTypefaceAtIndexL(CLinkedTypefaceElementSpec &, TInt)

IMPORT_C void	AddTypefaceAtIndexL	(	CLinkedTypefaceElementSpec &	aElementSpec,
			TInt	aIndex
		)

Adds the supplied CLinkedTypefaceElementSpec to the Linked Typeface specification. The element is placed at the specified index. Adding a canonical element will only be successful if one has not already been added. The specification takes ownership of the element specification if adding is successful.

CLinkedTypefaceSpecification::AddTypefaceAtBackL() CLinkedTypefaceSpecification::RemoveTypeface() KMaxLinkedTypefaces

leave: KErrArgument If the element is canonical and a canonical element already exists or if the group ID doesn't exist

leave: KErrNoMemory There was not enough memory available to perform this operation

leave: KErrOverflow The typeface specification is full; adding would exceed KMaxLinkedTypefaces

Parameters

CLinkedTypefaceElementSpec & aElementSpec	The specification to be added.
TInt aIndex	The position at which the element spec will be added.

CanonicalIndex()

IMPORT_C TInt

CanonicalIndex

(

)

Function to return the index of the canonical (metrics) typeface. The typeface can be retrieved by passing the index to Typeface().

CLinkedTypefaceSpecification::Typeface()

Clear()

IMPORT_C void

Clear

(

)

Removes and destroys all groups and elements from the specification.

WARNING: Function for internal use ONLY. Compatibility is not guaranteed in future releases.

ConstructL(const TDesC &)

void

ConstructL

(

const TDesC &

aTypefaceName

)

[private]

Parameters

const TDesC & aTypefaceName

DoAddTypefaceL(CLinkedTypefaceElementSpec &, TInt)

void	DoAddTypefaceL	(	CLinkedTypefaceElementSpec &	aElementSpec,
			TInt	aPos
		)	[private]

Parameters

CLinkedTypefaceElementSpec & aElementSpec
TInt aPos

FetchLinkedTypefaceSpecificationL(CFbsTypefaceStore &)

IMPORT_C void

FetchLinkedTypefaceSpecificationL

(

CFbsTypefaceStore &

aStore

)

Retrieves the linked typeface specification from the server; the name of the typeface to retrieve should be specified at construction. All typefaces and groups contained in the specification are removed before retrieval of the new data.

CLinkedTypefaceSpecification::NewLC()

leave: KErrNotSupported There is not a rasterizer available that supports linked typefaces

leave: KErrArgument The font specified does not exist or is not a linked typeface

Parameters

CFbsTypefaceStore & aStore

A pointer to the FontStore

Group(TInt)

IMPORT_C CLinkedTypefaceGroup *

Group

(

TInt

aGroupIndex

)

const

Returns the linked typeface group at the specified index within the specification. The Index ranges from 0 to the value returned by NumberOfGroups()-1.

Parameters

TInt aGroupIndex

The linked typeface groups index within the specification

GroupById(TInt)

IMPORT_C CLinkedTypefaceGroup *

GroupById

(

TInt

aGroupId

)

const

Returns the linked typeface group with the specified group ID.

Parameters

TInt aGroupId

The linked typeface group ID

GroupCount()

IMPORT_C TInt

GroupCount

(

)

const

Returns the number of groups that this linked typeface specification contains.

CLinkedTypefaceSpecification::Group()

Name()

IMPORT_C TPtrC

Name

(

)

const

The name of this linked typeface

NewLC(const TDesC &)

IMPORT_C CLinkedTypefaceSpecification *

NewLC

(

const TDesC &

aTypefaceName

)

[static]

This function constructs the linked typeface specification and places it on the CleanupStack.

The specification must contain at least one group and one typeface in order for registration to be successful.

Parameters

const TDesC & aTypefaceName

RegisterLinkedTypefaceL(CFbsTypefaceStore &)

IMPORT_C void

RegisterLinkedTypefaceL

(

CFbsTypefaceStore &

aStore

)

Creates the linked typeface so that it is available to use a normal typeface.

panic: EFbsPanicNoConnection There is no connection to the Font & Bitmap Server

leave: KErrNotFound One or more of the typeface elements do not exist

leave: KErrOverflow The linked typeface contains too many or 0 elements

leave: KErrArgument The typeface has no or more than one canonical element

leave: KErrAlreadyExists A typeface with the same name already exists

leave: KErrNotSupported There is not a rasterizer available that supports linked typefaces

Parameters

CFbsTypefaceStore & aStore

The Typeface Store the linked typeface should be registered with

RemoveLinkedTypefaceGroup(TInt)

IMPORT_C TInt

RemoveLinkedTypefaceGroup

(

TInt

aGroupId

)

This will remove the group and all the elements associated with it.

Parameters

TInt aGroupId

The Id of the group to be removed

RemoveTypeface(TInt)

IMPORT_C TInt

RemoveTypeface

(

TInt

aIndex

)

Removes the element spec at the specified index from this specification. This function deletes the element spec. If the element is the only one within its group the group is also removed and deleted from the specification.

Parameters

TInt aIndex

the index of the element spec to be removed

Typeface(TInt)

IMPORT_C CLinkedTypefaceElementSpec *

Typeface

(

TInt

aIndex

)

const

Returns the linked typeface at the specified index. The first typeface is at index 0, the last at TypefaceCount()-1. CLinkedTypefaceSpecification::NumberOfTypefaces()

Parameters

TInt aIndex

TypefaceCount()

IMPORT_C TInt

TypefaceCount

(

)

const

The number of typeface that have been added to this object

UpdateLinkedTypefaceL(CFbsTypefaceStore &)

IMPORT_C void

UpdateLinkedTypefaceL

(

CFbsTypefaceStore &

aStore

)

Update the specification of an existing linked typeface.

Parameters

CFbsTypefaceStore & aStore

A typeface store

Member Data Documentation

CLinkedTypefaceSpecificationBody * iBody

CLinkedTypefaceSpecificationBody *

iBody

[private]