Eusebiu Marcu
15 years ago
41 changed files with 279 additions and 179 deletions
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// Copyright (c) AlphaSierraPapa for the SharpDevelop Team (for details please see \doc\copyright.txt)
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// This code is distributed under MIT X11 license (for details please see \doc\license.txt)
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using System; |
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using System.Collections; |
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using System.Collections.Generic; |
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using System.Linq; |
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namespace ICSharpCode.NRefactory.CSharp |
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{ |
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/// <summary>
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/// Represents the children of an AstNode that have a specific role.
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/// </summary>
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public struct AstNodeCollection<T> : ICollection<T> where T : AstNode |
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{ |
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readonly AstNode node; |
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readonly Role<T> role; |
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public AstNodeCollection(AstNode node, Role<T> role) |
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{ |
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if (node == null) |
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throw new ArgumentNullException("node"); |
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if (role == null) |
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throw new ArgumentNullException("role"); |
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this.node = node; |
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this.role = role; |
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} |
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public int Count { |
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get { |
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var e = GetEnumerator(); |
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int count = 0; |
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while (e.MoveNext()) |
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count++; |
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return count; |
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} |
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} |
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public void Add(T element) |
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{ |
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node.AddChild(element, role); |
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} |
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public void AddRange(IEnumerable<T> nodes) |
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{ |
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// Evaluate 'nodes' first, since it might change when we add the new children
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// Example: collection.AddRange(collection);
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if (nodes != null) { |
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foreach (T node in nodes.ToList()) |
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Add(node); |
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} |
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} |
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public void AddRange(T[] nodes) |
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{ |
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// Fast overload for arrays - we don't need to create a copy
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if (nodes != null) { |
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foreach (T node in nodes) |
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Add(node); |
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} |
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} |
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public void ReplaceWith(IEnumerable<T> nodes) |
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{ |
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// Evaluate 'nodes' first, since it might change when we call Clear()
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// Example: collection.ReplaceWith(collection);
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if (nodes != null) |
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nodes = nodes.ToList(); |
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Clear(); |
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foreach (T node in nodes) |
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Add(node); |
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} |
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public void MoveTo(ICollection<T> targetCollection) |
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{ |
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foreach (T node in this) { |
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node.Remove(); |
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targetCollection.Add(node); |
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} |
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} |
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public bool Contains(T element) |
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{ |
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return element != null && element.Parent == node && element.Role == role; |
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} |
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public bool Remove(T element) |
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{ |
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if (Contains(element)) { |
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element.Remove(); |
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return true; |
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} else { |
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return false; |
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} |
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} |
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public void CopyTo(T[] array, int arrayIndex) |
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{ |
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foreach (T item in this) |
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array[arrayIndex++] = item; |
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} |
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public void Clear() |
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{ |
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foreach (T item in this) |
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item.Remove(); |
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} |
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bool ICollection<T>.IsReadOnly { |
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get { return false; } |
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} |
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public IEnumerator<T> GetEnumerator() |
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{ |
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AstNode next; |
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for (AstNode cur = node.FirstChild; cur != null; cur = next) { |
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// Remember next before yielding cur.
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// This allows removing/replacing nodes while iterating through the list.
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next = cur.NextSibling; |
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if (cur.Role == role) |
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yield return (T)cur; |
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} |
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} |
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IEnumerator IEnumerable.GetEnumerator() |
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{ |
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return GetEnumerator(); |
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} |
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#region Equals and GetHashCode implementation
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public override bool Equals(object obj) |
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{ |
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if (obj is AstNodeCollection<T>) { |
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return ((AstNodeCollection<T>)obj) == this; |
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} else { |
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return false; |
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} |
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} |
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public override int GetHashCode() |
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{ |
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return node.GetHashCode() ^ role.GetHashCode(); |
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} |
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public static bool operator ==(AstNodeCollection<T> left, AstNodeCollection<T> right) |
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{ |
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return left.role == right.role && left.node == right.node; |
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} |
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public static bool operator !=(AstNodeCollection<T> left, AstNodeCollection<T> right) |
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{ |
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return !(left.role == right.role && left.node == right.node); |
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} |
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#endregion
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} |
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} |
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