mirror of
https://github.com/JamesIves/github-pages-deploy-action.git
synced 2023-12-15 20:03:39 +08:00
839 lines
29 KiB
JavaScript
839 lines
29 KiB
JavaScript
'use strict';
|
|
|
|
/**
|
|
* @module symbol-tree
|
|
* @author Joris van der Wel <joris@jorisvanderwel.com>
|
|
*/
|
|
|
|
const SymbolTreeNode = require('./SymbolTreeNode');
|
|
const TreePosition = require('./TreePosition');
|
|
const TreeIterator = require('./TreeIterator');
|
|
|
|
function returnTrue() {
|
|
return true;
|
|
}
|
|
|
|
function reverseArrayIndex(array, reverseIndex) {
|
|
return array[array.length - 1 - reverseIndex]; // no need to check `index >= 0`
|
|
}
|
|
|
|
class SymbolTree {
|
|
|
|
/**
|
|
* @constructor
|
|
* @alias module:symbol-tree
|
|
* @param {string} [description='SymbolTree data'] Description used for the Symbol
|
|
*/
|
|
constructor(description) {
|
|
this.symbol = Symbol(description || 'SymbolTree data');
|
|
}
|
|
|
|
/**
|
|
* You can use this function to (optionally) initialize an object right after its creation,
|
|
* to take advantage of V8's fast properties. Also useful if you would like to
|
|
* freeze your object.
|
|
*
|
|
* `O(1)`
|
|
*
|
|
* @method
|
|
* @alias module:symbol-tree#initialize
|
|
* @param {Object} object
|
|
* @return {Object} object
|
|
*/
|
|
initialize(object) {
|
|
this._node(object);
|
|
|
|
return object;
|
|
}
|
|
|
|
_node(object) {
|
|
if (!object) {
|
|
return null;
|
|
}
|
|
|
|
const node = object[this.symbol];
|
|
|
|
if (node) {
|
|
return node;
|
|
}
|
|
|
|
return (object[this.symbol] = new SymbolTreeNode());
|
|
}
|
|
|
|
/**
|
|
* Returns `true` if the object has any children. Otherwise it returns `false`.
|
|
*
|
|
* * `O(1)`
|
|
*
|
|
* @method hasChildren
|
|
* @memberOf module:symbol-tree#
|
|
* @param {Object} object
|
|
* @return {Boolean}
|
|
*/
|
|
hasChildren(object) {
|
|
return this._node(object).hasChildren;
|
|
}
|
|
|
|
/**
|
|
* Returns the first child of the given object.
|
|
*
|
|
* * `O(1)`
|
|
*
|
|
* @method firstChild
|
|
* @memberOf module:symbol-tree#
|
|
* @param {Object} object
|
|
* @return {Object}
|
|
*/
|
|
firstChild(object) {
|
|
return this._node(object).firstChild;
|
|
}
|
|
|
|
/**
|
|
* Returns the last child of the given object.
|
|
*
|
|
* * `O(1)`
|
|
*
|
|
* @method lastChild
|
|
* @memberOf module:symbol-tree#
|
|
* @param {Object} object
|
|
* @return {Object}
|
|
*/
|
|
lastChild(object) {
|
|
return this._node(object).lastChild;
|
|
}
|
|
|
|
/**
|
|
* Returns the previous sibling of the given object.
|
|
*
|
|
* * `O(1)`
|
|
*
|
|
* @method previousSibling
|
|
* @memberOf module:symbol-tree#
|
|
* @param {Object} object
|
|
* @return {Object}
|
|
*/
|
|
previousSibling(object) {
|
|
return this._node(object).previousSibling;
|
|
}
|
|
|
|
/**
|
|
* Returns the next sibling of the given object.
|
|
*
|
|
* * `O(1)`
|
|
*
|
|
* @method nextSibling
|
|
* @memberOf module:symbol-tree#
|
|
* @param {Object} object
|
|
* @return {Object}
|
|
*/
|
|
nextSibling(object) {
|
|
return this._node(object).nextSibling;
|
|
}
|
|
|
|
/**
|
|
* Return the parent of the given object.
|
|
*
|
|
* * `O(1)`
|
|
*
|
|
* @method parent
|
|
* @memberOf module:symbol-tree#
|
|
* @param {Object} object
|
|
* @return {Object}
|
|
*/
|
|
parent(object) {
|
|
return this._node(object).parent;
|
|
}
|
|
|
|
/**
|
|
* Find the inclusive descendant that is last in tree order of the given object.
|
|
*
|
|
* * `O(n)` (worst case) where `n` is the depth of the subtree of `object`
|
|
*
|
|
* @method lastInclusiveDescendant
|
|
* @memberOf module:symbol-tree#
|
|
* @param {Object} object
|
|
* @return {Object}
|
|
*/
|
|
lastInclusiveDescendant(object) {
|
|
let lastChild;
|
|
let current = object;
|
|
|
|
while ((lastChild = this._node(current).lastChild)) {
|
|
current = lastChild;
|
|
}
|
|
|
|
return current;
|
|
}
|
|
|
|
/**
|
|
* Find the preceding object (A) of the given object (B).
|
|
* An object A is preceding an object B if A and B are in the same tree
|
|
* and A comes before B in tree order.
|
|
*
|
|
* * `O(n)` (worst case)
|
|
* * `O(1)` (amortized when walking the entire tree)
|
|
*
|
|
* @method preceding
|
|
* @memberOf module:symbol-tree#
|
|
* @param {Object} object
|
|
* @param {Object} [options]
|
|
* @param {Object} [options.root] If set, `root` must be an inclusive ancestor
|
|
* of the return value (or else null is returned). This check _assumes_
|
|
* that `root` is also an inclusive ancestor of the given `object`
|
|
* @return {?Object}
|
|
*/
|
|
preceding(object, options) {
|
|
const treeRoot = options && options.root;
|
|
|
|
if (object === treeRoot) {
|
|
return null;
|
|
}
|
|
|
|
const previousSibling = this._node(object).previousSibling;
|
|
|
|
if (previousSibling) {
|
|
return this.lastInclusiveDescendant(previousSibling);
|
|
}
|
|
|
|
// if there is no previous sibling return the parent (might be null)
|
|
return this._node(object).parent;
|
|
}
|
|
|
|
/**
|
|
* Find the following object (A) of the given object (B).
|
|
* An object A is following an object B if A and B are in the same tree
|
|
* and A comes after B in tree order.
|
|
*
|
|
* * `O(n)` (worst case) where `n` is the amount of objects in the entire tree
|
|
* * `O(1)` (amortized when walking the entire tree)
|
|
*
|
|
* @method following
|
|
* @memberOf module:symbol-tree#
|
|
* @param {!Object} object
|
|
* @param {Object} [options]
|
|
* @param {Object} [options.root] If set, `root` must be an inclusive ancestor
|
|
* of the return value (or else null is returned). This check _assumes_
|
|
* that `root` is also an inclusive ancestor of the given `object`
|
|
* @param {Boolean} [options.skipChildren=false] If set, ignore the children of `object`
|
|
* @return {?Object}
|
|
*/
|
|
following(object, options) {
|
|
const treeRoot = options && options.root;
|
|
const skipChildren = options && options.skipChildren;
|
|
|
|
const firstChild = !skipChildren && this._node(object).firstChild;
|
|
|
|
if (firstChild) {
|
|
return firstChild;
|
|
}
|
|
|
|
let current = object;
|
|
|
|
do {
|
|
if (current === treeRoot) {
|
|
return null;
|
|
}
|
|
|
|
const nextSibling = this._node(current).nextSibling;
|
|
|
|
if (nextSibling) {
|
|
return nextSibling;
|
|
}
|
|
|
|
current = this._node(current).parent;
|
|
} while (current);
|
|
|
|
return null;
|
|
}
|
|
|
|
/**
|
|
* Append all children of the given object to an array.
|
|
*
|
|
* * `O(n)` where `n` is the amount of children of the given `parent`
|
|
*
|
|
* @method childrenToArray
|
|
* @memberOf module:symbol-tree#
|
|
* @param {Object} parent
|
|
* @param {Object} [options]
|
|
* @param {Object[]} [options.array=[]]
|
|
* @param {Function} [options.filter] Function to test each object before it is added to the array.
|
|
* Invoked with arguments (object). Should return `true` if an object
|
|
* is to be included.
|
|
* @param {*} [options.thisArg] Value to use as `this` when executing `filter`.
|
|
* @return {Object[]}
|
|
*/
|
|
childrenToArray(parent, options) {
|
|
const array = (options && options.array) || [];
|
|
const filter = (options && options.filter) || returnTrue;
|
|
const thisArg = (options && options.thisArg) || undefined;
|
|
|
|
const parentNode = this._node(parent);
|
|
let object = parentNode.firstChild;
|
|
let index = 0;
|
|
|
|
while (object) {
|
|
const node = this._node(object);
|
|
node.setCachedIndex(parentNode, index);
|
|
|
|
if (filter.call(thisArg, object)) {
|
|
array.push(object);
|
|
}
|
|
|
|
object = node.nextSibling;
|
|
++index;
|
|
}
|
|
|
|
return array;
|
|
}
|
|
|
|
/**
|
|
* Append all inclusive ancestors of the given object to an array.
|
|
*
|
|
* * `O(n)` where `n` is the amount of ancestors of the given `object`
|
|
*
|
|
* @method ancestorsToArray
|
|
* @memberOf module:symbol-tree#
|
|
* @param {Object} object
|
|
* @param {Object} [options]
|
|
* @param {Object[]} [options.array=[]]
|
|
* @param {Function} [options.filter] Function to test each object before it is added to the array.
|
|
* Invoked with arguments (object). Should return `true` if an object
|
|
* is to be included.
|
|
* @param {*} [options.thisArg] Value to use as `this` when executing `filter`.
|
|
* @return {Object[]}
|
|
*/
|
|
ancestorsToArray(object, options) {
|
|
const array = (options && options.array) || [];
|
|
const filter = (options && options.filter) || returnTrue;
|
|
const thisArg = (options && options.thisArg) || undefined;
|
|
|
|
let ancestor = object;
|
|
|
|
while (ancestor) {
|
|
if (filter.call(thisArg, ancestor)) {
|
|
array.push(ancestor);
|
|
}
|
|
ancestor = this._node(ancestor).parent;
|
|
}
|
|
|
|
return array;
|
|
}
|
|
|
|
/**
|
|
* Append all descendants of the given object to an array (in tree order).
|
|
*
|
|
* * `O(n)` where `n` is the amount of objects in the sub-tree of the given `object`
|
|
*
|
|
* @method treeToArray
|
|
* @memberOf module:symbol-tree#
|
|
* @param {Object} root
|
|
* @param {Object} [options]
|
|
* @param {Object[]} [options.array=[]]
|
|
* @param {Function} [options.filter] Function to test each object before it is added to the array.
|
|
* Invoked with arguments (object). Should return `true` if an object
|
|
* is to be included.
|
|
* @param {*} [options.thisArg] Value to use as `this` when executing `filter`.
|
|
* @return {Object[]}
|
|
*/
|
|
treeToArray(root, options) {
|
|
const array = (options && options.array) || [];
|
|
const filter = (options && options.filter) || returnTrue;
|
|
const thisArg = (options && options.thisArg) || undefined;
|
|
|
|
let object = root;
|
|
|
|
while (object) {
|
|
if (filter.call(thisArg, object)) {
|
|
array.push(object);
|
|
}
|
|
object = this.following(object, {root: root});
|
|
}
|
|
|
|
return array;
|
|
}
|
|
|
|
/**
|
|
* Iterate over all children of the given object
|
|
*
|
|
* * `O(1)` for a single iteration
|
|
*
|
|
* @method childrenIterator
|
|
* @memberOf module:symbol-tree#
|
|
* @param {Object} parent
|
|
* @param {Object} [options]
|
|
* @param {Boolean} [options.reverse=false]
|
|
* @return {Object} An iterable iterator (ES6)
|
|
*/
|
|
childrenIterator(parent, options) {
|
|
const reverse = options && options.reverse;
|
|
const parentNode = this._node(parent);
|
|
|
|
return new TreeIterator(
|
|
this,
|
|
parent,
|
|
reverse ? parentNode.lastChild : parentNode.firstChild,
|
|
reverse ? TreeIterator.PREV : TreeIterator.NEXT
|
|
);
|
|
}
|
|
|
|
/**
|
|
* Iterate over all the previous siblings of the given object. (in reverse tree order)
|
|
*
|
|
* * `O(1)` for a single iteration
|
|
*
|
|
* @method previousSiblingsIterator
|
|
* @memberOf module:symbol-tree#
|
|
* @param {Object} object
|
|
* @return {Object} An iterable iterator (ES6)
|
|
*/
|
|
previousSiblingsIterator(object) {
|
|
return new TreeIterator(
|
|
this,
|
|
object,
|
|
this._node(object).previousSibling,
|
|
TreeIterator.PREV
|
|
);
|
|
}
|
|
|
|
/**
|
|
* Iterate over all the next siblings of the given object. (in tree order)
|
|
*
|
|
* * `O(1)` for a single iteration
|
|
*
|
|
* @method nextSiblingsIterator
|
|
* @memberOf module:symbol-tree#
|
|
* @param {Object} object
|
|
* @return {Object} An iterable iterator (ES6)
|
|
*/
|
|
nextSiblingsIterator(object) {
|
|
return new TreeIterator(
|
|
this,
|
|
object,
|
|
this._node(object).nextSibling,
|
|
TreeIterator.NEXT
|
|
);
|
|
}
|
|
|
|
/**
|
|
* Iterate over all inclusive ancestors of the given object
|
|
*
|
|
* * `O(1)` for a single iteration
|
|
*
|
|
* @method ancestorsIterator
|
|
* @memberOf module:symbol-tree#
|
|
* @param {Object} object
|
|
* @return {Object} An iterable iterator (ES6)
|
|
*/
|
|
ancestorsIterator(object) {
|
|
return new TreeIterator(
|
|
this,
|
|
object,
|
|
object,
|
|
TreeIterator.PARENT
|
|
);
|
|
}
|
|
|
|
/**
|
|
* Iterate over all descendants of the given object (in tree order).
|
|
*
|
|
* Where `n` is the amount of objects in the sub-tree of the given `root`:
|
|
*
|
|
* * `O(n)` (worst case for a single iteration)
|
|
* * `O(n)` (amortized, when completing the iterator)
|
|
*
|
|
* @method treeIterator
|
|
* @memberOf module:symbol-tree#
|
|
* @param {Object} root
|
|
* @param {Object} options
|
|
* @param {Boolean} [options.reverse=false]
|
|
* @return {Object} An iterable iterator (ES6)
|
|
*/
|
|
treeIterator(root, options) {
|
|
const reverse = options && options.reverse;
|
|
|
|
return new TreeIterator(
|
|
this,
|
|
root,
|
|
reverse ? this.lastInclusiveDescendant(root) : root,
|
|
reverse ? TreeIterator.PRECEDING : TreeIterator.FOLLOWING
|
|
);
|
|
}
|
|
|
|
/**
|
|
* Find the index of the given object (the number of preceding siblings).
|
|
*
|
|
* * `O(n)` where `n` is the amount of preceding siblings
|
|
* * `O(1)` (amortized, if the tree is not modified)
|
|
*
|
|
* @method index
|
|
* @memberOf module:symbol-tree#
|
|
* @param {Object} child
|
|
* @return {Number} The number of preceding siblings, or -1 if the object has no parent
|
|
*/
|
|
index(child) {
|
|
const childNode = this._node(child);
|
|
const parentNode = this._node(childNode.parent);
|
|
|
|
if (!parentNode) {
|
|
// In principal, you could also find out the number of preceding siblings
|
|
// for objects that do not have a parent. This method limits itself only to
|
|
// objects that have a parent because that lets us optimize more.
|
|
return -1;
|
|
}
|
|
|
|
let currentIndex = childNode.getCachedIndex(parentNode);
|
|
|
|
if (currentIndex >= 0) {
|
|
return currentIndex;
|
|
}
|
|
|
|
currentIndex = 0;
|
|
let object = parentNode.firstChild;
|
|
|
|
if (parentNode.childIndexCachedUpTo) {
|
|
const cachedUpToNode = this._node(parentNode.childIndexCachedUpTo);
|
|
object = cachedUpToNode.nextSibling;
|
|
currentIndex = cachedUpToNode.getCachedIndex(parentNode) + 1;
|
|
}
|
|
|
|
while (object) {
|
|
const node = this._node(object);
|
|
node.setCachedIndex(parentNode, currentIndex);
|
|
|
|
if (object === child) {
|
|
break;
|
|
}
|
|
|
|
++currentIndex;
|
|
object = node.nextSibling;
|
|
}
|
|
|
|
parentNode.childIndexCachedUpTo = child;
|
|
|
|
return currentIndex;
|
|
}
|
|
|
|
/**
|
|
* Calculate the number of children.
|
|
*
|
|
* * `O(n)` where `n` is the amount of children
|
|
* * `O(1)` (amortized, if the tree is not modified)
|
|
*
|
|
* @method childrenCount
|
|
* @memberOf module:symbol-tree#
|
|
* @param {Object} parent
|
|
* @return {Number}
|
|
*/
|
|
childrenCount(parent) {
|
|
const parentNode = this._node(parent);
|
|
|
|
if (!parentNode.lastChild) {
|
|
return 0;
|
|
}
|
|
|
|
return this.index(parentNode.lastChild) + 1;
|
|
}
|
|
|
|
/**
|
|
* Compare the position of an object relative to another object. A bit set is returned:
|
|
*
|
|
* <ul>
|
|
* <li>DISCONNECTED : 1</li>
|
|
* <li>PRECEDING : 2</li>
|
|
* <li>FOLLOWING : 4</li>
|
|
* <li>CONTAINS : 8</li>
|
|
* <li>CONTAINED_BY : 16</li>
|
|
* </ul>
|
|
*
|
|
* The semantics are the same as compareDocumentPosition in DOM, with the exception that
|
|
* DISCONNECTED never occurs with any other bit.
|
|
*
|
|
* where `n` and `m` are the amount of ancestors of `left` and `right`;
|
|
* where `o` is the amount of children of the lowest common ancestor of `left` and `right`:
|
|
*
|
|
* * `O(n + m + o)` (worst case)
|
|
* * `O(n + m)` (amortized, if the tree is not modified)
|
|
*
|
|
* @method compareTreePosition
|
|
* @memberOf module:symbol-tree#
|
|
* @param {Object} left
|
|
* @param {Object} right
|
|
* @return {Number}
|
|
*/
|
|
compareTreePosition(left, right) {
|
|
// In DOM terms:
|
|
// left = reference / context object
|
|
// right = other
|
|
|
|
if (left === right) {
|
|
return 0;
|
|
}
|
|
|
|
/* jshint -W016 */
|
|
|
|
const leftAncestors = []; { // inclusive
|
|
let leftAncestor = left;
|
|
|
|
while (leftAncestor) {
|
|
if (leftAncestor === right) {
|
|
return TreePosition.CONTAINS | TreePosition.PRECEDING;
|
|
// other is ancestor of reference
|
|
}
|
|
|
|
leftAncestors.push(leftAncestor);
|
|
leftAncestor = this.parent(leftAncestor);
|
|
}
|
|
}
|
|
|
|
|
|
const rightAncestors = []; {
|
|
let rightAncestor = right;
|
|
|
|
while (rightAncestor) {
|
|
if (rightAncestor === left) {
|
|
return TreePosition.CONTAINED_BY | TreePosition.FOLLOWING;
|
|
}
|
|
|
|
rightAncestors.push(rightAncestor);
|
|
rightAncestor = this.parent(rightAncestor);
|
|
}
|
|
}
|
|
|
|
|
|
const root = reverseArrayIndex(leftAncestors, 0);
|
|
|
|
if (!root || root !== reverseArrayIndex(rightAncestors, 0)) {
|
|
// note: unlike DOM, preceding / following is not set here
|
|
return TreePosition.DISCONNECTED;
|
|
}
|
|
|
|
// find the lowest common ancestor
|
|
let commonAncestorIndex = 0;
|
|
const ancestorsMinLength = Math.min(leftAncestors.length, rightAncestors.length);
|
|
|
|
for (let i = 0; i < ancestorsMinLength; ++i) {
|
|
const leftAncestor = reverseArrayIndex(leftAncestors, i);
|
|
const rightAncestor = reverseArrayIndex(rightAncestors, i);
|
|
|
|
if (leftAncestor !== rightAncestor) {
|
|
break;
|
|
}
|
|
|
|
commonAncestorIndex = i;
|
|
}
|
|
|
|
// indexes within the common ancestor
|
|
const leftIndex = this.index(reverseArrayIndex(leftAncestors, commonAncestorIndex + 1));
|
|
const rightIndex = this.index(reverseArrayIndex(rightAncestors, commonAncestorIndex + 1));
|
|
|
|
return rightIndex < leftIndex
|
|
? TreePosition.PRECEDING
|
|
: TreePosition.FOLLOWING;
|
|
}
|
|
|
|
/**
|
|
* Remove the object from this tree.
|
|
* Has no effect if already removed.
|
|
*
|
|
* * `O(1)`
|
|
*
|
|
* @method remove
|
|
* @memberOf module:symbol-tree#
|
|
* @param {Object} removeObject
|
|
* @return {Object} removeObject
|
|
*/
|
|
remove(removeObject) {
|
|
const removeNode = this._node(removeObject);
|
|
const parentNode = this._node(removeNode.parent);
|
|
const prevNode = this._node(removeNode.previousSibling);
|
|
const nextNode = this._node(removeNode.nextSibling);
|
|
|
|
if (parentNode) {
|
|
if (parentNode.firstChild === removeObject) {
|
|
parentNode.firstChild = removeNode.nextSibling;
|
|
}
|
|
|
|
if (parentNode.lastChild === removeObject) {
|
|
parentNode.lastChild = removeNode.previousSibling;
|
|
}
|
|
}
|
|
|
|
if (prevNode) {
|
|
prevNode.nextSibling = removeNode.nextSibling;
|
|
}
|
|
|
|
if (nextNode) {
|
|
nextNode.previousSibling = removeNode.previousSibling;
|
|
}
|
|
|
|
removeNode.parent = null;
|
|
removeNode.previousSibling = null;
|
|
removeNode.nextSibling = null;
|
|
removeNode.cachedIndex = -1;
|
|
removeNode.cachedIndexVersion = NaN;
|
|
|
|
if (parentNode) {
|
|
parentNode.childrenChanged();
|
|
}
|
|
|
|
return removeObject;
|
|
}
|
|
|
|
/**
|
|
* Insert the given object before the reference object.
|
|
* `newObject` is now the previous sibling of `referenceObject`.
|
|
*
|
|
* * `O(1)`
|
|
*
|
|
* @method insertBefore
|
|
* @memberOf module:symbol-tree#
|
|
* @param {Object} referenceObject
|
|
* @param {Object} newObject
|
|
* @throws {Error} If the newObject is already present in this SymbolTree
|
|
* @return {Object} newObject
|
|
*/
|
|
insertBefore(referenceObject, newObject) {
|
|
const referenceNode = this._node(referenceObject);
|
|
const prevNode = this._node(referenceNode.previousSibling);
|
|
const newNode = this._node(newObject);
|
|
const parentNode = this._node(referenceNode.parent);
|
|
|
|
if (newNode.isAttached) {
|
|
throw Error('Given object is already present in this SymbolTree, remove it first');
|
|
}
|
|
|
|
newNode.parent = referenceNode.parent;
|
|
newNode.previousSibling = referenceNode.previousSibling;
|
|
newNode.nextSibling = referenceObject;
|
|
referenceNode.previousSibling = newObject;
|
|
|
|
if (prevNode) {
|
|
prevNode.nextSibling = newObject;
|
|
}
|
|
|
|
if (parentNode && parentNode.firstChild === referenceObject) {
|
|
parentNode.firstChild = newObject;
|
|
}
|
|
|
|
if (parentNode) {
|
|
parentNode.childrenChanged();
|
|
}
|
|
|
|
return newObject;
|
|
}
|
|
|
|
/**
|
|
* Insert the given object after the reference object.
|
|
* `newObject` is now the next sibling of `referenceObject`.
|
|
*
|
|
* * `O(1)`
|
|
*
|
|
* @method insertAfter
|
|
* @memberOf module:symbol-tree#
|
|
* @param {Object} referenceObject
|
|
* @param {Object} newObject
|
|
* @throws {Error} If the newObject is already present in this SymbolTree
|
|
* @return {Object} newObject
|
|
*/
|
|
insertAfter(referenceObject, newObject) {
|
|
const referenceNode = this._node(referenceObject);
|
|
const nextNode = this._node(referenceNode.nextSibling);
|
|
const newNode = this._node(newObject);
|
|
const parentNode = this._node(referenceNode.parent);
|
|
|
|
if (newNode.isAttached) {
|
|
throw Error('Given object is already present in this SymbolTree, remove it first');
|
|
}
|
|
|
|
newNode.parent = referenceNode.parent;
|
|
newNode.previousSibling = referenceObject;
|
|
newNode.nextSibling = referenceNode.nextSibling;
|
|
referenceNode.nextSibling = newObject;
|
|
|
|
if (nextNode) {
|
|
nextNode.previousSibling = newObject;
|
|
}
|
|
|
|
if (parentNode && parentNode.lastChild === referenceObject) {
|
|
parentNode.lastChild = newObject;
|
|
}
|
|
|
|
if (parentNode) {
|
|
parentNode.childrenChanged();
|
|
}
|
|
|
|
return newObject;
|
|
}
|
|
|
|
/**
|
|
* Insert the given object as the first child of the given reference object.
|
|
* `newObject` is now the first child of `referenceObject`.
|
|
*
|
|
* * `O(1)`
|
|
*
|
|
* @method prependChild
|
|
* @memberOf module:symbol-tree#
|
|
* @param {Object} referenceObject
|
|
* @param {Object} newObject
|
|
* @throws {Error} If the newObject is already present in this SymbolTree
|
|
* @return {Object} newObject
|
|
*/
|
|
prependChild(referenceObject, newObject) {
|
|
const referenceNode = this._node(referenceObject);
|
|
const newNode = this._node(newObject);
|
|
|
|
if (newNode.isAttached) {
|
|
throw Error('Given object is already present in this SymbolTree, remove it first');
|
|
}
|
|
|
|
if (referenceNode.hasChildren) {
|
|
this.insertBefore(referenceNode.firstChild, newObject);
|
|
}
|
|
else {
|
|
newNode.parent = referenceObject;
|
|
referenceNode.firstChild = newObject;
|
|
referenceNode.lastChild = newObject;
|
|
referenceNode.childrenChanged();
|
|
}
|
|
|
|
return newObject;
|
|
}
|
|
|
|
/**
|
|
* Insert the given object as the last child of the given reference object.
|
|
* `newObject` is now the last child of `referenceObject`.
|
|
*
|
|
* * `O(1)`
|
|
*
|
|
* @method appendChild
|
|
* @memberOf module:symbol-tree#
|
|
* @param {Object} referenceObject
|
|
* @param {Object} newObject
|
|
* @throws {Error} If the newObject is already present in this SymbolTree
|
|
* @return {Object} newObject
|
|
*/
|
|
appendChild(referenceObject, newObject) {
|
|
const referenceNode = this._node(referenceObject);
|
|
const newNode = this._node(newObject);
|
|
|
|
if (newNode.isAttached) {
|
|
throw Error('Given object is already present in this SymbolTree, remove it first');
|
|
}
|
|
|
|
if (referenceNode.hasChildren) {
|
|
this.insertAfter(referenceNode.lastChild, newObject);
|
|
}
|
|
else {
|
|
newNode.parent = referenceObject;
|
|
referenceNode.firstChild = newObject;
|
|
referenceNode.lastChild = newObject;
|
|
referenceNode.childrenChanged();
|
|
}
|
|
|
|
return newObject;
|
|
}
|
|
}
|
|
|
|
module.exports = SymbolTree;
|
|
SymbolTree.TreePosition = TreePosition;
|