Delta class

Deltas are a simple, yet expressive format that can be used to describe contents and changes. The format is JSON based, and is human readable, yet easily parsible by machines. Deltas can describe any rich text document, includes all text and formatting information, without the ambiguity and complexity of HTML.

Basically borrowed from: https://github.com/quilljs/delta

Inheritance
Available Extensions

Constructors

Delta({List<TextOperation>? operations})
Delta.fromJson(List list)
factory

Properties

first → TextOperation
The first element.
no setterinherited
hashCode → int
The hash code for this object.
no setteroverride
isEmpty → bool
Whether this collection has no elements.
no setterinherited
isNotEmpty → bool
Whether this collection has at least one element.
no setterinherited
iterator → Iterator<TextOperation>
A new Iterator that allows iterating the elements of this Iterable.
no setteroverride
last → TextOperation
The last element.
no setterinherited
length → int
The length of the string of the Delta.
no setteroverride
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
single → TextOperation
Checks that this iterable has only one element, and returns that element.
no setterinherited

Methods

add(TextOperation textOperation) → void
addAll(Iterable<TextOperation> textOperations) → void
any(bool test(TextOperation element)) → bool
Checks whether any element of this iterable satisfies test.
inherited
cast<R>() → Iterable<R>
A view of this iterable as an iterable of R instances.
inherited
chop() → void
compose(Delta other) → Delta
Returns a Delta that is equivalent to applying the operations of own Delta, followed by another Delta.
contains(Object? element) → bool
Whether the collection contains an element equal to element.
inherited
delete(int length) → void
Delete operations have a Number delete key defined representing the number of characters to delete.
diff(Delta other) → Delta
elementAt(int index) → TextOperation
Returns the indexth element.
inherited
every(bool test(TextOperation element)) → bool
Checks whether every element of this iterable satisfies test.
inherited
expand<T>(Iterable<T> toElements(TextOperation element)) → Iterable<T>
Expands each element of this Iterable into zero or more elements.
inherited
firstWhere(bool test(TextOperation element), {TextOperation orElse()?}) → TextOperation
The first element that satisfies the given predicate test.
inherited
fold<T>(T initialValue, T combine(T previousValue, TextOperation element)) → T
Reduces a collection to a single value by iteratively combining each element of the collection with an existing value
inherited
followedBy(Iterable<TextOperation> other) → Iterable<TextOperation>
Creates the lazy concatenation of this iterable and other.
inherited
forEach(void action(TextOperation element)) → void
Invokes action on each element of this iterable in iteration order.
inherited
insert(String text, {Attributes? attributes}) → void
Insert operations have an insert key defined. A String value represents inserting text.
invert(Delta base) → Delta
Returned an inverted delta that has the opposite effect of against a base document delta.
join([String separator = ""]) → String
Converts each element to a String and concatenates the strings.
inherited
lastWhere(bool test(TextOperation element), {TextOperation orElse()?}) → TextOperation
The last element that satisfies the given predicate test.
inherited
map<T>(T toElement(TextOperation e)) → Iterable<T>
The current elements of this iterable modified by toElement.
inherited
nextRunePosition(int pos) → int
This method will return the position of the next rune.
noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
prevRunePosition(int pos) → int
This method will return the position of the previous rune.
reduce(TextOperation combine(TextOperation value, TextOperation element)) → TextOperation
Reduces a collection to a single value by iteratively combining elements of the collection using the provided function.
inherited
retain(int length, {Attributes? attributes}) → void
Retain operations have a Number retain key defined representing the number of characters to keep (other libraries might use the name keep or skip). An optional attributes key can be defined with an Object to describe formatting changes to the character range. A value of null in the attributes Object represents removal of that key.
singleWhere(bool test(TextOperation element), {TextOperation orElse()?}) → TextOperation
The single element that satisfies test.
inherited
skip(int count) → Iterable<TextOperation>
Creates an Iterable that provides all but the first count elements.
inherited
skipWhile(bool test(TextOperation value)) → Iterable<TextOperation>
Creates an Iterable that skips leading elements while test is satisfied.
inherited
slice(int start, [int? end]) → Delta
The slice() method does not change the original string. The start and end parameters specifies the part of the string to extract. The end position is optional.
sliceAttributes(int index) → Attributes?
take(int count) → Iterable<TextOperation>
Creates a lazy iterable of the count first elements of this iterable.
inherited
takeWhile(bool test(TextOperation value)) → Iterable<TextOperation>
Creates a lazy iterable of the leading elements satisfying test.
inherited
toJson() → List
toList({bool growable = true}) → List<TextOperation>
Creates a List containing the elements of this Iterable.
inherited
toPlainText() → String
toSet() → Set<TextOperation>
Creates a Set containing the same elements as this iterable.
inherited
toString() → String
Returns a string representation of (some of) the elements of this.
inherited
trim() → void
where(bool test(TextOperation element)) → Iterable<TextOperation>
Creates a new lazy Iterable with all elements that satisfy the predicate test.
inherited
whereType<T>() → Iterable<T>
Creates a new lazy Iterable with all elements that have type T.
inherited

Operators

operator +(Delta other) → Delta
This method joins two Delta together.
operator ==(Object other) → bool
The equality operator.
override