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Make Children thread safe

This commit is contained in:
Frank A. Krueger 2017-06-16 17:33:27 -07:00
parent 84ee2e9785
commit 04a81cd9bc
2 changed files with 37 additions and 18 deletions
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53
Ooui/Node.cs
View File

@ -8,10 +8,16 @@ namespace Ooui
{
readonly List<Node> children = new List<Node> ();
public IEnumerable<Node> Children => children;
public IReadOnlyList<Node> Children {
get {
lock (children) {
return new List<Node> (children).AsReadOnly ();
}
}
}
public virtual string Text {
get { return String.Join ("", from c in children select c.Text); }
get { return String.Join ("", from c in Children select c.Text); }
set {
ReplaceAll (new TextNode (value ?? ""));
}
@ -42,18 +48,21 @@ namespace Ooui
public Node InsertBefore (Node newChild, Node referenceChild)
{
if (referenceChild == null) {
newChild.MessageSent += HandleChildMessageSent;
children.Add (newChild);
}
else {
var index = children.IndexOf (referenceChild);
if (index < 0) {
throw new ArgumentException ("Reference must be a child of this element", nameof (referenceChild));
}
newChild.MessageSent += HandleChildMessageSent;
children.Insert (index, newChild);
if (newChild == null)
return null;
lock (children) {
if (referenceChild == null) {
children.Add (newChild);
}
else {
var index = children.IndexOf (referenceChild);
if (index < 0) {
throw new ArgumentException ("Reference must be a child of this element", nameof (referenceChild));
}
children.Insert (index, newChild);
}
}
newChild.MessageSent += HandleChildMessageSent;
SendCall ("insertBefore", newChild, referenceChild);
return newChild;
}
@ -62,8 +71,10 @@ namespace Ooui
{
if (child == null)
return null;
if (!children.Remove (child)) {
throw new ArgumentException ("Child not contained in this element", nameof(child));
lock (children) {
if (!children.Remove (child)) {
throw new ArgumentException ("Child not contained in this element", nameof(child));
}
}
child.MessageSent -= HandleChildMessageSent;
SendCall ("removeChild", child);
@ -72,9 +83,15 @@ namespace Ooui
protected void ReplaceAll (Node newNode)
{
var toRemove = new List<Node> (children);
foreach (var c in toRemove)
RemoveChild (c);
var toRemove = new List<Node> ();
lock (children) {
toRemove.AddRange (children);
children.Clear ();
}
foreach (var child in toRemove) {
child.MessageSent -= HandleChildMessageSent;
SendCall ("removeChild", child);
}
InsertBefore (newNode, null);
}

2
Tests/ButtonTests.cs
View File

@ -12,6 +12,7 @@ namespace Tests
public void DefaultCtor ()
{
var b = new Button ();
Assert.AreEqual (0, b.Children.Count);
Assert.AreEqual ("button", b.TagName);
Assert.AreEqual ("", b.Text);
}
@ -20,6 +21,7 @@ namespace Tests
public void TextCtor ()
{
var b = new Button ("Hello World!");
Assert.AreEqual (1, b.Children.Count);
Assert.AreEqual ("Hello World!", b.Text);
}