GI.Pango.Objects.Coverage

A PangoCoverage structure is a map from Unicode characters to CoverageLevel values.

It is often necessary in Pango to determine if a particular font can represent a particular character, and also how well it can represent that character. The PangoCoverage is a data structure that is used to represent that information. It is an opaque structure with no public fields.

Exported types

newtype Coverage

Memory-managed wrapper type.

Constructors

Coverage (ManagedPtr Coverage)

Instances

Eq Coverage

Defined in GI.Pango.Objects.Coverage

Methods

(==) :: Coverage -> Coverage -> Bool

(/=) :: Coverage -> Coverage -> Bool

GObject Coverage

Defined in GI.Pango.Objects.Coverage

ManagedPtrNewtype Coverage

Defined in GI.Pango.Objects.Coverage

Methods

toManagedPtr :: Coverage -> ManagedPtr Coverage

TypedObject Coverage

Defined in GI.Pango.Objects.Coverage

Methods

glibType :: IO GType

HasParentTypes Coverage

Defined in GI.Pango.Objects.Coverage

IsGValue (Maybe Coverage)

Convert Coverage to and from GValue. See toGValue and fromGValue.

Defined in GI.Pango.Objects.Coverage

Methods

gvalueGType_ :: IO GType

gvalueSet_ :: Ptr GValue -> Maybe Coverage -> IO ()

gvalueGet_ :: Ptr GValue -> IO (Maybe Coverage)

type ParentTypes Coverage

Defined in GI.Pango.Objects.Coverage

type ParentTypes Coverage = '[Object]

class (GObject o, IsDescendantOf Coverage o) => IsCoverage o

Type class for types which can be safely cast to Coverage, for instance with toCoverage.

Instances

(GObject o, IsDescendantOf Coverage o) => IsCoverage o

Defined in GI.Pango.Objects.Coverage

toCoverage :: (MonadIO m, IsCoverage o) => o -> m Coverage

Cast to Coverage, for types for which this is known to be safe. For general casts, use castTo.

Methods

Click to display all available methods, including inherited ones

Methods

bindProperty, bindPropertyFull, copy, forceFloating, freezeNotify, get, getv, isFloating, max, notify, notifyByPspec, ref, refSink, runDispose, set, stealData, stealQdata, thawNotify, toBytes, unref, watchClosure.

Getters

getData, getProperty, getQdata.

Setters

setData, setDataFull, setProperty.

copy

coverageCopy

Arguments

:: (HasCallStack, MonadIO m, IsCoverage a)

=> a

coverage: a PangoCoverage

-> m Coverage

Returns: the newly allocated PangoCoverage, with a reference count of one, which should be freed with coverageUnref.

Copy an existing PangoCoverage.

fromBytes

coverageFromBytes

Arguments

:: (HasCallStack, MonadIO m)

=> ByteString

bytes: binary data representing a PangoCoverage

-> m (Maybe Coverage)

Returns: a newly allocated PangoCoverage

Deprecated: (Since version 1.44)This returns Nothing

Convert data generated from coverageToBytes back to a PangoCoverage.

get

coverageGet

Arguments

:: (HasCallStack, MonadIO m, IsCoverage a)

=> a

coverage: a PangoCoverage

-> Int32

index_: the index to check

-> m CoverageLevel

Returns: the coverage level of coverage for character index_.

Determine whether a particular index is covered by coverage.

max

coverageMax

Arguments

:: (HasCallStack, MonadIO m, IsCoverage a, IsCoverage b)

=> a

coverage: a PangoCoverage

-> b

other: another PangoCoverage

-> m ()

Deprecated: (Since version 1.44)This function does nothing

Set the coverage for each index in coverage to be the max (better) value of the current coverage for the index and the coverage for the corresponding index in other.

new

coverageNew

Arguments

:: (HasCallStack, MonadIO m)

=> m Coverage

Returns: the newly allocated PangoCoverage, initialized to CoverageLevelNone with a reference count of one, which should be freed with coverageUnref.

Create a new PangoCoverage

ref

coverageRef

Arguments

:: (HasCallStack, MonadIO m, IsCoverage a)

=> a

coverage: a PangoCoverage

-> m Coverage

Returns: coverage

Increase the reference count on the PangoCoverage by one.

set

coverageSet

Arguments

:: (HasCallStack, MonadIO m, IsCoverage a)

=> a

coverage: a PangoCoverage

-> Int32

index_: the index to modify

-> CoverageLevel

level: the new level for index_

-> m ()

Modify a particular index within coverage

toBytes

coverageToBytes

Arguments

:: (HasCallStack, MonadIO m, IsCoverage a)

=> a

coverage: a PangoCoverage

-> m ByteString

Deprecated: (Since version 1.44)This returns Nothing

Convert a PangoCoverage structure into a flat binary format.

unref

coverageUnref

Arguments

:: (HasCallStack, MonadIO m, IsCoverage a)

=> a

coverage: a PangoCoverage

-> m ()

Decrease the reference count on the PangoCoverage by one.

If the result is zero, free the coverage and all associated memory.