ModelRange
Represents a range in the model tree.
A range is defined by its start and end positions.
You can create range instances via its constructor or the createRange*() factory methods of Model and ModelWriter.
Properties
end : ModelPositionreadonlymodule:engine/model/range~ModelRange#endEnd position.
isCollapsed : booleanreadonlymodule:engine/model/range~ModelRange#isCollapsedisFlat : booleanreadonlymodule:engine/model/range~ModelRange#isFlatroot : ModelElement | ModelDocumentFragmentreadonlymodule:engine/model/range~ModelRange#rootRange root element.
start : ModelPositionreadonlymodule:engine/model/range~ModelRange#startStart position.
Methods
constructor( start, [ end ] )module:engine/model/range~ModelRange#constructorCreates a range spanning from
startposition toendposition.Parameters
start : ModelPositionThe start position.
[ end ] : null | ModelPositionThe end position. If not set, the range will be collapsed at the
startposition.
Symbol.iterator() → IterableIterator<ModelTreeWalkerValue>module:engine/model/range~ModelRange#Symbol.iteratorIterable interface.
Iterates over all items that are in this range and returns them together with additional information like length or positions, grouped as
ModelTreeWalkerValue. It iterates over all text contents that are inside the range and all theModelElements that are entered into when iterating over this range.This iterator uses
ModelTreeWalkerwithboundariesset to this range andignoreElementEndoption set totrue.Returns
IterableIterator<ModelTreeWalkerValue>
clone() → thismodule:engine/model/range~ModelRange#clonecontainsItem( item ) → booleanmodule:engine/model/range~ModelRange#containsItemcontainsPosition( position ) → booleanmodule:engine/model/range~ModelRange#containsPositionChecks whether this range contains given position.
Parameters
position : ModelPositionPosition to check.
Returns
booleantrueif given position is contained in this range,falseotherwise.
containsRange( otherRange, loose ) → booleanmodule:engine/model/range~ModelRange#containsRangeChecks whether this range contains given range.
Parameters
otherRange : ModelRangeRange to check.
loose : booleanWhether the check is loose or strict. If the check is strict (
false), compared range cannot start or end at the same position as this range boundaries. If the check is loose (true), compared range can start, end or even be equal to this range. Note that collapsed ranges are always compared in strict mode.Defaults to
false
Returns
booleantrueif given range boundaries are contained by this range,falseotherwise.
getCommonAncestor() → null | ModelElement | ModelDocumentFragmentmodule:engine/model/range~ModelRange#getCommonAncestorReturns an
ModelElementorModelDocumentFragmentwhich is a common ancestor of the range's both ends (in which the entire range is contained).Returns
null | ModelElement | ModelDocumentFragment
getContainedElement() → null | ModelElementmodule:engine/model/range~ModelRange#getContainedElementReturns an Element contained by the range. The element will be returned when it is the only node within the range and fully–contained at the same time.
Returns
null | ModelElement
getDifference( otherRange ) → Array<ModelRange>module:engine/model/range~ModelRange#getDifferenceComputes which part(s) of this range is not a part of given range. Returned array contains zero, one or two ranges.
Examples:
let range = model.createRange( model.createPositionFromPath( root, [ 2, 7 ] ), model.createPositionFromPath( root, [ 4, 0, 1 ] ) ); let otherRange = model.createRange( model.createPositionFromPath( root, [ 1 ] ), model.createPositionFromPath( root, [ 5 ] ) ); let transformed = range.getDifference( otherRange ); // transformed array has no ranges because `otherRange` contains `range` otherRange = model.createRange( model.createPositionFromPath( root, [ 1 ] ), model.createPositionFromPath( root, [ 3 ] ) ); transformed = range.getDifference( otherRange ); // transformed array has one range: from [ 3 ] to [ 4, 0, 1 ] otherRange = model.createRange( model.createPositionFromPath( root, [ 3 ] ), model.createPositionFromPath( root, [ 4 ] ) ); transformed = range.getDifference( otherRange ); // transformed array has two ranges: from [ 2, 7 ] to [ 3 ] and from [ 4 ] to [ 4, 0, 1 ]Copy codeParameters
otherRange : ModelRangeRange to differentiate against.
Returns
Array<ModelRange>The difference between ranges.
getIntersection( otherRange ) → null | ModelRangemodule:engine/model/range~ModelRange#getIntersectionReturns an intersection of this range and given range. Intersection is a common part of both of those ranges. If ranges has no common part, returns
null.Examples:
let range = model.createRange( model.createPositionFromPath( root, [ 2, 7 ] ), model.createPositionFromPath( root, [ 4, 0, 1 ] ) ); let otherRange = model.createRange( model.createPositionFromPath( root, [ 1 ] ), model.createPositionFromPath( root, [ 2 ] ) ); let transformed = range.getIntersection( otherRange ); // null - ranges have no common part otherRange = model.createRange( model.createPositionFromPath( root, [ 3 ] ), model.createPositionFromPath( root, [ 5 ] ) ); transformed = range.getIntersection( otherRange ); // range from [ 3 ] to [ 4, 0, 1 ]Copy codeParameters
otherRange : ModelRangeRange to check for intersection.
Returns
null | ModelRangeA common part of given ranges or
nullif ranges have no common part.
module:engine/model/range~ModelRange#getItemsReturns an iterator that iterates over all items that are in this range and returns them.
This method uses
ModelTreeWalkerwithboundariesset to this range andignoreElementEndoption set totrue. However it returns only model items, notModelTreeWalkerValue.You may specify additional options for the tree walker. See
ModelTreeWalkerfor a full list of available options.Parameters
options : ModelTreeWalkerOptionsObject with configuration options. See
ModelTreeWalker.Defaults to
{}
Returns
IterableIterator<ModelItem>
getJoined( otherRange, loose ) → null | ModelRangemodule:engine/model/range~ModelRange#getJoinedReturns a range created by joining this range with the given range. If ranges have no common part, returns
null.Examples:
let range = model.createRange( model.createPositionFromPath( root, [ 2, 7 ] ), model.createPositionFromPath( root, [ 4, 0, 1 ] ) ); let otherRange = model.createRange( model.createPositionFromPath( root, [ 1 ] ), model.createPositionFromPath( root, [ 2 ] ) * ); let transformed = range.getJoined( otherRange ); // null - ranges have no common part otherRange = model.createRange( model.createPositionFromPath( root, [ 3 ] ), model.createPositionFromPath( root, [ 5 ] ) ); transformed = range.getJoined( otherRange ); // range from [ 2, 7 ] to [ 5 ]Copy codeParameters
otherRange : ModelRangeRange to be joined.
loose : booleanWhether the intersection check is loose or strict. If the check is strict (
false), ranges are tested for intersection or whether start/end positions are equal. If the check is loose (true), compared range is also checked if it's touching current range.Defaults to
false
Returns
null | ModelRangeA sum of given ranges or
nullif ranges have no common part.
getMinimalFlatRanges() → Array<ModelRange>module:engine/model/range~ModelRange#getMinimalFlatRangesComputes and returns the smallest set of flat ranges, that covers this range in whole.
See an example of a model structure (
[and]are range boundaries):root root |- element DIV DIV P2 P3 DIV | |- element H H P1 f o o b a r H P4 | | |- "fir[st" fir[st lorem se]cond ipsum | |- element P1 | | |- "lorem" || |- element P2 || | |- "foo" VV |- element P3 | |- "bar" root |- element DIV DIV [P2 P3] DIV | |- element H H [P1] f o o b a r H P4 | | |- "se]cond" fir[st] lorem [se]cond ipsum | |- element P4 | | |- "ipsum"Copy codeAs it can be seen, letters contained in the range are:
stloremfoobarse, spread across different parents. We are looking for minimal set of flat ranges that contains the same nodes.Minimal flat ranges for above range
( [ 0, 0, 3 ], [ 3, 0, 2 ] )will be:( [ 0, 0, 3 ], [ 0, 0, 5 ] ) = "st" ( [ 0, 1 ], [ 0, 2 ] ) = element P1 ("lorem") ( [ 1 ], [ 3 ] ) = element P2, element P3 ("foobar") ( [ 3, 0, 0 ], [ 3, 0, 2 ] ) = "se"Copy codeNote: if an element is not wholly contained in this range, it won't be returned in any of the returned flat ranges. See in the example how
Helements at the beginning and at the end of the range were omitted. Only their parts that were wholly in the range were returned.Note: this method is not returning flat ranges that contain no nodes.
Returns
Array<ModelRange>Array of flat ranges covering this range.
getPositions( options ) → IterableIterator<ModelPosition>module:engine/model/range~ModelRange#getPositionsReturns an iterator that iterates over all positions that are boundaries or contained in this range.
This method uses
ModelTreeWalkerwithboundariesset to this range. However it returns only positions, notModelTreeWalkerValue.You may specify additional options for the tree walker. See
ModelTreeWalkerfor a full list of available options.Parameters
options : ModelTreeWalkerOptionsObject with configuration options. See
ModelTreeWalker.Defaults to
{}
Returns
IterableIterator<ModelPosition>
getTransformedByOperation( operation ) → Array<ModelRange>module:engine/model/range~ModelRange#getTransformedByOperationReturns a range that is a result of transforming this range by given
operation.Note: transformation may break one range into multiple ranges (for example, when a part of the range is moved to a different part of document tree). For this reason, an array is returned by this method and it may contain one or more
Rangeinstances.Parameters
operation : OperationOperation to transform range by.
Returns
Array<ModelRange>Range which is the result of transformation.
getTransformedByOperations( operations ) → Array<ModelRange>module:engine/model/range~ModelRange#getTransformedByOperationsReturns a range that is a result of transforming this range by multiple
operations.Parameters
operations : Iterable<Operation>Operations to transform the range by.
Returns
Array<ModelRange>Range which is the result of transformation.
Related:
getWalker( options ) → ModelTreeWalkermodule:engine/model/range~ModelRange#getWalkerCreates a TreeWalker instance with this range as a boundary.
For example, to iterate over all items in the entire document root:
// Create a range spanning over the entire root content: const range = editor.model.createRangeIn( editor.model.document.getRoot() ); // Iterate over all items in this range: for ( const value of range.getWalker() ) { console.log( value.item ); }Copy codeParameters
options : ModelTreeWalkerOptionsObject with configuration options. See
ModelTreeWalker.Defaults to
{}
Returns
is( type ) → this is ModelElement | ModelRootElementinheritedmodule:engine/model/range~ModelRange#is:ELEMENTChecks whether the object is of type
ModelElementor its subclass.element.is( 'element' ); // -> true element.is( 'node' ); // -> true element.is( 'model:element' ); // -> true element.is( 'model:node' ); // -> true element.is( 'view:element' ); // -> false element.is( 'documentSelection' ); // -> falseCopy codeAssuming that the object being checked is an element, you can also check its name:
element.is( 'element', 'imageBlock' ); // -> true if this is an <imageBlock> element text.is( 'element', 'imageBlock' ); -> falseCopy codeParameters
type : 'element' | 'model:element'
Returns
this is ModelElement | ModelRootElement
module:engine/model/range~ModelRange#is:TEXTChecks whether the object is of type
ModelText.text.is( '$text' ); // -> true text.is( 'node' ); // -> true text.is( 'model:$text' ); // -> true text.is( 'model:node' ); // -> true text.is( 'view:$text' ); // -> false text.is( 'documentSelection' ); // -> falseCopy codeNote: Until version 20.0.0 this method wasn't accepting
'$text'type. The legacy'text'type is still accepted for backward compatibility.Parameters
type : '$text' | 'model:$text'
Returns
this is ModelText
is( type ) → this is ModelRootElementinheritedmodule:engine/model/range~ModelRange#is:ROOT_ELEMENTChecks whether the object is of type
ModelRootElement.rootElement.is( 'rootElement' ); // -> true rootElement.is( 'element' ); // -> true rootElement.is( 'node' ); // -> true rootElement.is( 'model:rootElement' ); // -> true rootElement.is( 'model:element' ); // -> true rootElement.is( 'model:node' ); // -> true rootElement.is( 'view:element' ); // -> false rootElement.is( 'documentFragment' ); // -> falseCopy codeAssuming that the object being checked is an element, you can also check its name:
rootElement.is( 'rootElement', '$root' ); // -> same as aboveCopy codeParameters
type : 'rootElement' | 'model:rootElement'
Returns
this is ModelRootElement
is( type ) → this is ModelLiveRangeinheritedmodule:engine/model/range~ModelRange#is:LIVE_RANGEChecks whether the object is of type
ModelLiveRange.liveRange.is( 'range' ); // -> true liveRange.is( 'model:range' ); // -> true liveRange.is( 'liveRange' ); // -> true liveRange.is( 'model:liveRange' ); // -> true liveRange.is( 'view:range' ); // -> false liveRange.is( 'documentSelection' ); // -> falseCopy codeParameters
type : 'liveRange' | 'model:liveRange'
Returns
this is ModelLiveRange
is( type ) → this is ModelRange | ModelLiveRangeinheritedmodule:engine/model/range~ModelRange#is:RANGEChecks whether the object is of type
ModelRangeor its subclass.range.is( 'range' ); // -> true range.is( 'model:range' ); // -> true range.is( 'view:range' ); // -> false range.is( 'documentSelection' ); // -> falseCopy codeParameters
type : 'range' | 'model:range'
Returns
this is ModelRange | ModelLiveRange
is( type ) → this is ModelLivePositioninheritedmodule:engine/model/range~ModelRange#is:LIVE_POSITIONChecks whether the object is of type
ModelLivePosition.livePosition.is( 'position' ); // -> true livePosition.is( 'model:position' ); // -> true livePosition.is( 'liveposition' ); // -> true livePosition.is( 'model:livePosition' ); // -> true livePosition.is( 'view:position' ); // -> false livePosition.is( 'documentSelection' ); // -> falseCopy codeParameters
type : 'livePosition' | 'model:livePosition'
Returns
this is ModelLivePosition
is( type ) → this is ModelPosition | ModelLivePositioninheritedmodule:engine/model/range~ModelRange#is:POSITIONChecks whether the object is of type
ModelPositionor its subclass.position.is( 'position' ); // -> true position.is( 'model:position' ); // -> true position.is( 'view:position' ); // -> false position.is( 'documentSelection' ); // -> falseCopy codeParameters
type : 'position' | 'model:position'
Returns
this is ModelPosition | ModelLivePosition
is( type ) → this is ModelSelection | ModelDocumentSelectioninheritedmodule:engine/model/range~ModelRange#is:SELECTIONChecks whether the object is of type
ModelSelectionorModelDocumentSelection.selection.is( 'selection' ); // -> true selection.is( 'model:selection' ); // -> true selection.is( 'view:selection' ); // -> false selection.is( 'range' ); // -> falseCopy codeParameters
type : 'selection' | 'model:selection'
Returns
this is ModelSelection | ModelDocumentSelection
is( type, name ) → booleaninheritedmodule:engine/model/range~ModelRange#is:ELEMENT_NAMEChecks whether the object is of type
ModelElementor its subclass and has the specifiedname.element.is( 'element', 'imageBlock' ); // -> true if this is an <imageBlock> element text.is( 'element', 'imageBlock' ); -> falseCopy codeType parameters
N : extends string
Parameters
type : 'element' | 'model:element'name : N
Returns
boolean
is( type, name ) → booleaninheritedmodule:engine/model/range~ModelRange#is:ROOT_ELEMENT_NAMEChecks whether the object is of type
ModelRootElementand has the specifiedname.rootElement.is( 'rootElement', '$root' );Copy codeType parameters
N : extends string
Parameters
type : 'rootElement' | 'model:rootElement'name : N
Returns
boolean
is( type ) → this is ModelTextProxyinheritedmodule:engine/model/range~ModelRange#is:TEXT_PROXYChecks whether the object is of type
ModelTextProxy.textProxy.is( '$textProxy' ); // -> true textProxy.is( 'model:$textProxy' ); // -> true textProxy.is( 'view:$textProxy' ); // -> false textProxy.is( 'range' ); // -> falseCopy codeNote: Until version 20.0.0 this method wasn't accepting
'$textProxy'type. The legacy'textProxt'type is still accepted for backward compatibility.Parameters
type : '$textProxy' | 'model:$textProxy'
Returns
this is ModelTextProxy
module:engine/model/range~ModelRange#is:MARKERis( type ) → this is ModelDocumentSelectioninheritedmodule:engine/model/range~ModelRange#is:DOCUMENT_SELECTIONChecks whether the object is of type
ModelDocumentSelection.selection.is( 'selection' ); // -> true selection.is( 'documentSelection' ); // -> true selection.is( 'model:selection' ); // -> true selection.is( 'model:documentSelection' ); // -> true selection.is( 'view:selection' ); // -> false selection.is( 'element' ); // -> false selection.is( 'node' ); // -> falseCopy codeParameters
type : 'documentSelection' | 'model:documentSelection'
Returns
this is ModelDocumentSelection
is( type ) → this is ModelDocumentFragmentinheritedmodule:engine/model/range~ModelRange#is:DOCUMENT_FRAGMENTChecks whether the object is of type
ModelDocumentFragment.docFrag.is( 'documentFragment' ); // -> true docFrag.is( 'model:documentFragment' ); // -> true docFrag.is( 'view:documentFragment' ); // -> false docFrag.is( 'element' ); // -> false docFrag.is( 'node' ); // -> falseCopy codeParameters
type : 'documentFragment' | 'model:documentFragment'
Returns
this is ModelDocumentFragment
is( type ) → this is ModelNode | ModelText | ModelElement | ModelRootElementinheritedmodule:engine/model/range~ModelRange#is:NODEChecks whether the object is of type
ModelNodeor its subclass.This method is useful when processing model objects that are of unknown type. For example, a function may return a
ModelDocumentFragmentor aModelNodethat can be either a text node or an element. This method can be used to check what kind of object is returned.someObject.is( 'element' ); // -> true if this is an element someObject.is( 'node' ); // -> true if this is a node (a text node or an element) someObject.is( 'documentFragment' ); // -> true if this is a document fragmentCopy codeSince this method is also available on a range of view objects, you can prefix the type of the object with
model:orview:to check, for example, if this is the model's or view's element:modelElement.is( 'model:element' ); // -> true modelElement.is( 'view:element' ); // -> falseCopy codeBy using this method it is also possible to check a name of an element:
imageElement.is( 'element', 'imageBlock' ); // -> true imageElement.is( 'element', 'imageBlock' ); // -> same as above imageElement.is( 'model:element', 'imageBlock' ); // -> same as above, but more preciseCopy codeParameters
type : 'node' | 'model:node'
Returns
this is ModelNode | ModelText | ModelElement | ModelRootElement
isEqual( otherRange ) → booleanmodule:engine/model/range~ModelRange#isEqualTwo ranges are equal if their
startandendpositions are equal.Parameters
otherRange : ModelRangeRange to compare with.
Returns
booleantrueif ranges are equal,falseotherwise.
isIntersecting( otherRange ) → booleanmodule:engine/model/range~ModelRange#isIntersectingChecks and returns whether this range intersects with given range.
Parameters
otherRange : ModelRangeRange to compare with.
Returns
booleantrueif ranges intersect,falseotherwise.
toJSON() → unknownmodule:engine/model/range~ModelRange#toJSONConverts
Rangeto plain object and returns it.Returns
unknownRangeconverted to plain object.
_getTransformedByDeletion( deletePosition, howMany ) → null | ModelRangeinternalmodule:engine/model/range~ModelRange#_getTransformedByDeletionReturns a copy of this range that is transformed by deletion of
howManynodes fromdeletePosition.If the deleted range is intersecting with the transformed range, the transformed range will be shrank.
If the deleted range contains transformed range,
nullwill be returned.Parameters
deletePosition : ModelPositionPosition from which nodes are removed.
howMany : numberHow many nodes are removed.
Returns
null | ModelRangeResult of the transformation.
_getTransformedByInsertOperation( operation, spread ) → Array<ModelRange>internalmodule:engine/model/range~ModelRange#_getTransformedByInsertOperationReturns a result of transforming a copy of this range by insert operation.
One or more ranges may be returned as a result of this transformation.
Parameters
operation : InsertOperationspread : booleanDefaults to
false
Returns
Array<ModelRange>
_getTransformedByInsertion( insertPosition, howMany, spread ) → Array<ModelRange>internalmodule:engine/model/range~ModelRange#_getTransformedByInsertionReturns an array containing one or two ranges that are a result of transforming this range by inserting
howManynodes atinsertPosition. Two ranges are returned if the insertion was inside this range andspreadis set totrue.Examples:
let range = model.createRange( model.createPositionFromPath( root, [ 2, 7 ] ), model.createPositionFromPath( root, [ 4, 0, 1 ] ) ); let transformed = range._getTransformedByInsertion( model.createPositionFromPath( root, [ 1 ] ), 2 ); // transformed array has one range from [ 4, 7 ] to [ 6, 0, 1 ] transformed = range._getTransformedByInsertion( model.createPositionFromPath( root, [ 4, 0, 0 ] ), 4 ); // transformed array has one range from [ 2, 7 ] to [ 4, 0, 5 ] transformed = range._getTransformedByInsertion( model.createPositionFromPath( root, [ 3, 2 ] ), 4 ); // transformed array has one range, which is equal to original range transformed = range._getTransformedByInsertion( model.createPositionFromPath( root, [ 3, 2 ] ), 4, true ); // transformed array has two ranges: from [ 2, 7 ] to [ 3, 2 ] and from [ 3, 6 ] to [ 4, 0, 1 ]Copy codeParameters
insertPosition : ModelPositionPosition where nodes are inserted.
howMany : numberHow many nodes are inserted.
spread : booleanFlag indicating whether this range should be spread if insertion was inside the range. Defaults to
false.Defaults to
false
Returns
Array<ModelRange>Result of the transformation.
_getTransformedByMergeOperation( operation ) → ModelRangeinternalmodule:engine/model/range~ModelRange#_getTransformedByMergeOperationReturns a result of transforming a copy of this range by merge operation.
Always one range is returned. The transformation is done in a way to not break the range.
Parameters
operation : MergeOperation
Returns
_getTransformedByMove( sourcePosition, targetPosition, howMany, spread ) → Array<ModelRange>internalmodule:engine/model/range~ModelRange#_getTransformedByMoveReturns an array containing ranges that are a result of transforming this range by moving
howManynodes fromsourcePositiontotargetPosition.Parameters
sourcePosition : ModelPositionPosition from which nodes are moved.
targetPosition : ModelPositionPosition to where nodes are moved.
howMany : numberHow many nodes are moved.
spread : booleanWhether the range should be spread if the move points inside the range.
Defaults to
false
Returns
Array<ModelRange>Result of the transformation.
_getTransformedByMoveOperation( operation, spread ) → Array<ModelRange>internalmodule:engine/model/range~ModelRange#_getTransformedByMoveOperationReturns a result of transforming a copy of this range by move operation.
One or more ranges may be returned as a result of this transformation.
Parameters
operation : MoveOperationspread : booleanDefaults to
false
Returns
Array<ModelRange>
_getTransformedBySplitOperation( operation ) → ModelRangeinternalmodule:engine/model/range~ModelRange#_getTransformedBySplitOperationReturns a result of transforming a copy of this range by split operation.
Always one range is returned. The transformation is done in a way to not break the range.
Parameters
operation : SplitOperation
Returns
Static methods
fromJSON( json, doc ) → ModelRangestaticmodule:engine/model/range~ModelRange.fromJSONCreates a
Rangeinstance from given plain object (i.e. parsed JSON string).Parameters
json : anyPlain object to be converted to
Range.doc : ModelDocumentDocument object that will be range owner.
Returns
ModelRangeRangeinstance created using given plain object.
_createFromPositionAndShift( position, shift ) → ModelRangeinternalstaticmodule:engine/model/range~ModelRange._createFromPositionAndShiftCreates a new range, spreading from specified position to a position moved by given
shift. Ifshiftis a negative value, shifted position is treated as the beginning of the range.Parameters
position : ModelPositionBeginning of the range.
shift : numberHow long the range should be.
Returns
_createFromRanges( ranges ) → ModelRangeinternalstaticmodule:engine/model/range~ModelRange._createFromRangesCombines all ranges from the passed array into a one range. At least one range has to be passed. Passed ranges must not have common parts.
The first range from the array is a reference range. If other ranges start or end on the exactly same position where the reference range, they get combined into one range.
[ ][] [ ][ ][ ][ ][] [ ] // Passed ranges, shown sorted [ ] // The result of the function if the first range was a reference range. [ ] // The result of the function if the third-to-seventh range was a reference range. [ ] // The result of the function if the last range was a reference range.Copy codeParameters
ranges : Array<ModelRange>Ranges to combine.
Returns
ModelRangeCombined range.
_createIn( element ) → ModelRangeinternalstaticmodule:engine/model/range~ModelRange._createInCreates a range inside an element which starts before the first child of that element and ends after the last child of that element.
Parameters
element : ModelElement | ModelDocumentFragmentElement which is a parent for the range.
Returns
_createOn( item ) → ModelRangeinternalstaticmodule:engine/model/range~ModelRange._createOnCreates a range that starts before given model item and ends after it.
Parameters
item : ModelItem
Returns