CharacterMetadata is an Immutable
represents inline style and entity information for a single character.
CharacterMetadata objects are aggressively pooled and shared. If two characters
have the same inline style and entity, they are represented with the same
CharacterMetadata object. We therefore need only as many objects as combinations
of utilized inline style sets with entity keys, keeping our memory footprint
small even as the contents grow in size and complexity.
To that end, you should create or apply changes to
via the provided set of static methods, which will ensure that pooling is utilized.
Most Draft use cases are unlikely to use these static methods, since most common edit operations are already implemented and available via utility modules. The getter methods, however, may come in handy at render time.
See the API reference on
for information on how
CharacterMetadata is used within
Under the hood, these methods will utilize pooling to return a matching object, or return a new object if none exists.
static create(config?: CharacterMetadataConfig): CharacterMetadata
CharacterMetadata object from the provided configuration. This
function should be used in lieu of a constructor.
The configuration will be used to check whether a pooled match for this
configuration already exists. If so, the pooled object will be returned.
Otherwise, a new
CharacterMetadata will be pooled for this configuration,
static applyStyle( record: CharacterMetadata, style: string ): CharacterMetadata
Apply an inline style to this
static removeStyle( record: CharacterMetadata, style: string ): CharacterMetadata
Remove an inline style from this
static applyEntity( record: CharacterMetadata, entityKey: ?string ): CharacterMetadata
Apply an entity key -- or provide
null to remove an entity key -- on this
DraftInlineStyle for this character, an
OrderedSet of strings
that represents the inline style to apply for the character at render time.
hasStyle(style: string): boolean
Returns whether this character has the specified style.
Returns the entity key (if any) for this character, as mapped to the global set of
entities tracked by the
By tracking a string key here, we can keep the corresponding metadata separate from the character representation.
If null, no entity is applied for this character.