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Now that RenderTreeFrame is properly readonly (and because the usage is so low-level) can use fields directly

This commit is contained in:
Steve Sanderson 2018-02-05 00:37:03 +00:00
parent 93f17219ea
commit 848b7dc5df
1 changed files with 62 additions and 56 deletions
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118
src/Microsoft.AspNetCore.Blazor/RenderTree/RenderTreeFrame.cs
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@ -24,128 +24,134 @@ namespace Microsoft.AspNetCore.Blazor.RenderTree
// if running as a web worker) so for now to keep things simple, treat reference types as // if running as a web worker) so for now to keep things simple, treat reference types as
// 8 bytes here. // 8 bytes here.
// --------------------------------------------------------------------------------
// Common // Common
[FieldOffset(0)] readonly int _sequence; // --------------------------------------------------------------------------------
[FieldOffset(4)] readonly RenderTreeFrameType _frameType;
// RenderTreeFrameType.Element
[FieldOffset(8)] readonly int _elementDescendantsEndIndex;
[FieldOffset(16)] readonly string _elementName;
// RenderTreeFrameType.Text
[FieldOffset(16)] readonly string _textContent;
// RenderTreeFrameType.Attribute
[FieldOffset(16)] readonly string _attributeName;
[FieldOffset(24)] readonly object _attributeValue;
// RenderTreeFrameType.Component
[FieldOffset(8)] readonly int _componentDescendantsEndIndex;
[FieldOffset(12)] readonly int _componentId;
[FieldOffset(16)] readonly Type _componentType;
[FieldOffset(24)] readonly IComponent _component;
/// <summary> /// <summary>
/// Gets the sequence number of the frame. Sequence numbers indicate the relative source /// Gets the sequence number of the frame. Sequence numbers indicate the relative source
/// positions of the instructions that inserted the frames. Sequence numbers are only /// positions of the instructions that inserted the frames. Sequence numbers are only
/// comparable within the same sequence (typically, the same source method). /// comparable within the same sequence (typically, the same source method).
/// </summary> /// </summary>
public int Sequence => _sequence; [FieldOffset(0)] public readonly int Sequence;
/// <summary> /// <summary>
/// Describes the type of this frame. /// Describes the type of this frame.
/// </summary> /// </summary>
public RenderTreeFrameType FrameType => _frameType; [FieldOffset(4)] public readonly RenderTreeFrameType FrameType;
// --------------------------------------------------------------------------------
// RenderTreeFrameType.Element
// --------------------------------------------------------------------------------
/// <summary>
/// If the <see cref="FrameType"/> property equals <see cref="RenderTreeFrameType.Element"/>,
/// gets the index of the final descendant frame in the tree. The value is
/// zero if the frame has not yet been closed.
/// </summary>
[FieldOffset(8)] public readonly int ElementDescendantsEndIndex;
/// <summary> /// <summary>
/// If the <see cref="FrameType"/> property equals <see cref="RenderTreeFrameType.Element"/>, /// If the <see cref="FrameType"/> property equals <see cref="RenderTreeFrameType.Element"/>,
/// gets a name representing the type of the element. Otherwise, the value is <see langword="null"/>. /// gets a name representing the type of the element. Otherwise, the value is <see langword="null"/>.
/// </summary> /// </summary>
public string ElementName => _elementName; [FieldOffset(16)] public readonly string ElementName;
/// <summary> // --------------------------------------------------------------------------------
/// If the <see cref="FrameType"/> property equals <see cref="RenderTreeFrameType.Element"/>, // RenderTreeFrameType.Text
/// gets the index of the final descendant frame in the tree. The value is // --------------------------------------------------------------------------------
/// zero if the frame is of a different type, or if it has not yet been closed.
/// </summary>
public int ElementDescendantsEndIndex => _elementDescendantsEndIndex;
/// <summary> /// <summary>
/// If the <see cref="FrameType"/> property equals <see cref="RenderTreeFrameType.Text"/>, /// If the <see cref="FrameType"/> property equals <see cref="RenderTreeFrameType.Text"/>,
/// gets the content of the text frame. Otherwise, the value is <see langword="null"/>. /// gets the content of the text frame. Otherwise, the value is <see langword="null"/>.
/// </summary> /// </summary>
public string TextContent => _textContent; [FieldOffset(16)] public readonly string TextContent;
// --------------------------------------------------------------------------------
// RenderTreeFrameType.Attribute
// --------------------------------------------------------------------------------
/// <summary> /// <summary>
/// If the <see cref="FrameType"/> property equals <see cref="RenderTreeFrameType.Attribute"/>, /// If the <see cref="FrameType"/> property equals <see cref="RenderTreeFrameType.Attribute"/>,
/// gets the attribute name. Otherwise, the value is <see langword="null"/>. /// gets the attribute name. Otherwise, the value is <see langword="null"/>.
/// </summary> /// </summary>
public string AttributeName => _attributeName; [FieldOffset(16)] public readonly string AttributeName;
/// <summary> /// <summary>
/// If the <see cref="FrameType"/> property equals <see cref="RenderTreeFrameType.Attribute"/>, /// If the <see cref="FrameType"/> property equals <see cref="RenderTreeFrameType.Attribute"/>,
/// gets the attribute value. Otherwise, the value is <see langword="null"/>. /// gets the attribute value. Otherwise, the value is <see langword="null"/>.
/// </summary> /// </summary>
public object AttributeValue => _attributeValue; [FieldOffset(24)] public readonly object AttributeValue;
// --------------------------------------------------------------------------------
// RenderTreeFrameType.Component
// --------------------------------------------------------------------------------
/// <summary> /// <summary>
/// If the <see cref="FrameType"/> property equals <see cref="RenderTreeFrameType.Component"/>, /// If the <see cref="FrameType"/> property equals <see cref="RenderTreeFrameType.Component"/>,
/// gets the type of the child component. /// gets the index of the final descendant frame in the tree. The value is
/// zero if the frame has not yet been closed.
/// </summary> /// </summary>
public Type ComponentType => _componentType; [FieldOffset(8)] public readonly int ComponentDescendantsEndIndex;
/// <summary> /// <summary>
/// If the <see cref="FrameType"/> property equals <see cref="RenderTreeFrameType.Component"/>, /// If the <see cref="FrameType"/> property equals <see cref="RenderTreeFrameType.Component"/>,
/// gets the child component instance identifier. /// gets the child component instance identifier.
/// </summary> /// </summary>
public int ComponentId => _componentId; [FieldOffset(12)] public readonly int ComponentId;
/// <summary>
/// If the <see cref="FrameType"/> property equals <see cref="RenderTreeFrameType.Component"/>,
/// gets the type of the child component.
/// </summary>
[FieldOffset(16)] public readonly Type ComponentType;
/// <summary> /// <summary>
/// If the <see cref="FrameType"/> property equals <see cref="RenderTreeFrameType.Component"/>, /// If the <see cref="FrameType"/> property equals <see cref="RenderTreeFrameType.Component"/>,
/// gets the child component instance. Otherwise, the value is <see langword="null"/>. /// gets the child component instance. Otherwise, the value is <see langword="null"/>.
/// </summary> /// </summary>
public IComponent Component => _component; [FieldOffset(24)] public readonly IComponent Component;
private RenderTreeFrame(int sequence, string elementName, int descendantsEndIndex) private RenderTreeFrame(int sequence, string elementName, int descendantsEndIndex)
: this() : this()
{ {
_frameType = RenderTreeFrameType.Element; FrameType = RenderTreeFrameType.Element;
_sequence = sequence; Sequence = sequence;
_elementName = elementName; ElementName = elementName;
_elementDescendantsEndIndex = descendantsEndIndex; ElementDescendantsEndIndex = descendantsEndIndex;
} }
private RenderTreeFrame(int sequence, Type componentType, int descendantsEndIndex) private RenderTreeFrame(int sequence, Type componentType, int descendantsEndIndex)
: this() : this()
{ {
_frameType = RenderTreeFrameType.Component; FrameType = RenderTreeFrameType.Component;
_sequence = sequence; Sequence = sequence;
_componentType = componentType; ComponentType = componentType;
_componentDescendantsEndIndex = descendantsEndIndex; ComponentDescendantsEndIndex = descendantsEndIndex;
} }
private RenderTreeFrame(int sequence, Type componentType, int descendantsEndIndex, int componentId, IComponent component) private RenderTreeFrame(int sequence, Type componentType, int descendantsEndIndex, int componentId, IComponent component)
: this(sequence, componentType, descendantsEndIndex) : this(sequence, componentType, descendantsEndIndex)
{ {
_componentId = componentId; ComponentId = componentId;
_component = component; Component = component;
} }
private RenderTreeFrame(int sequence, string textContent) private RenderTreeFrame(int sequence, string textContent)
: this() : this()
{ {
_frameType = RenderTreeFrameType.Text; FrameType = RenderTreeFrameType.Text;
_sequence = sequence; Sequence = sequence;
_textContent = textContent; TextContent = textContent;
} }
private RenderTreeFrame(int sequence, string attributeName, object attributeValue) private RenderTreeFrame(int sequence, string attributeName, object attributeValue)
: this() : this()
{ {
_frameType = RenderTreeFrameType.Attribute; FrameType = RenderTreeFrameType.Attribute;
_sequence = sequence; Sequence = sequence;
_attributeName = attributeName; AttributeName = attributeName;
_attributeValue = attributeValue; AttributeValue = attributeValue;
} }
internal static RenderTreeFrame Element(int sequence, string elementName) internal static RenderTreeFrame Element(int sequence, string elementName)
@ -164,15 +170,15 @@ namespace Microsoft.AspNetCore.Blazor.RenderTree
=> new RenderTreeFrame(sequence, typeof(T), 0); => new RenderTreeFrame(sequence, typeof(T), 0);
internal RenderTreeFrame WithElementDescendantsEndIndex(int descendantsEndIndex) internal RenderTreeFrame WithElementDescendantsEndIndex(int descendantsEndIndex)
=> new RenderTreeFrame(_sequence, elementName: _elementName, descendantsEndIndex: descendantsEndIndex); => new RenderTreeFrame(Sequence, elementName: ElementName, descendantsEndIndex: descendantsEndIndex);
internal RenderTreeFrame WithComponentDescendantsEndIndex(int descendantsEndIndex) internal RenderTreeFrame WithComponentDescendantsEndIndex(int descendantsEndIndex)
=> new RenderTreeFrame(_sequence, componentType: _componentType, descendantsEndIndex: descendantsEndIndex); => new RenderTreeFrame(Sequence, componentType: ComponentType, descendantsEndIndex: descendantsEndIndex);
internal RenderTreeFrame WithAttributeSequence(int sequence) internal RenderTreeFrame WithAttributeSequence(int sequence)
=> new RenderTreeFrame(sequence, attributeName: _attributeName, attributeValue: _attributeValue); => new RenderTreeFrame(sequence, attributeName: AttributeName, attributeValue: AttributeValue);
internal RenderTreeFrame WithComponentInstance(int componentId, IComponent component) internal RenderTreeFrame WithComponentInstance(int componentId, IComponent component)
=> new RenderTreeFrame(_sequence, _componentType, _componentDescendantsEndIndex, componentId, component); => new RenderTreeFrame(Sequence, ComponentType, ComponentDescendantsEndIndex, componentId, component);
} }
} }