54 lines
1.1 KiB
Smalltalk
54 lines
1.1 KiB
Smalltalk
"
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Leaf node. Any content node is leaf
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"
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Class {
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#name : #GrafoscopioLeafNode,
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#superclass : #GrafoscopioAbstractNode,
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#instVars : [
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'parent'
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],
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#category : 'Grafoscopio-Model'
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}
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{ #category : #testing }
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GrafoscopioLeafNode class >> isLeaf [
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^ true
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]
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{ #category : #accessing }
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GrafoscopioLeafNode >> acceptVisitor: aGrafoscopioVisitor [
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aGrafoscopioVisitor visitLeafNode: self.
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]
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{ #category : #accessing }
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GrafoscopioLeafNode >> addChild: aBlock ofClass: aClass [
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self error: 'Leaf nodes are abstract. '
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]
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{ #category : #accessing }
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GrafoscopioLeafNode >> level [
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"Returns the level of the node. See the setter message for details"
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^ parent ifNil: [ 0 ] ifNotNil: [ 1 + parent level ]
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]
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{ #category : #accessing }
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GrafoscopioLeafNode >> parent [
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"Returns the parent of the current node"
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^ parent
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]
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{ #category : #accessing }
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GrafoscopioLeafNode >> parent: aNode [
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"A parent is a node that has the current node in its children"
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aNode ifNil: [
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parent := aNode.
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^self ].
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aNode parent = self ifTrue: [ ^ self ].
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parent := aNode.
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(aNode children includes: self)
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ifFalse: [ aNode addNode: self ]
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]
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