91 lines
3.2 KiB
C#
91 lines
3.2 KiB
C#
// Copyright (c) 2014 AlphaSierraPapa for the SharpDevelop Team
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy of this
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// software and associated documentation files (the "Software"), to deal in the Software
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// without restriction, including without limitation the rights to use, copy, modify, merge,
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// publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons
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// to whom the Software is furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in all copies or
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// substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
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// INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
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// PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE
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// FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
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// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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// DEALINGS IN THE SOFTWARE.
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using System;
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using System.Diagnostics.CodeAnalysis;
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namespace Unity.CodeEditor.Rendering
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{
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/// <summary>
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/// An enumeration of well-known layers.
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/// </summary>
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internal enum KnownLayer
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{
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/// <summary>
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/// This layer is in the background.
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/// There is no UIElement to represent this layer, it is directly drawn in the TextView.
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/// It is not possible to replace the background layer or insert new layers below it.
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/// </summary>
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/// <remarks>This layer is below the Selection layer.</remarks>
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Background,
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/// <summary>
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/// This layer contains the selection rectangle.
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/// </summary>
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/// <remarks>This layer is between the Background and the Text layers.</remarks>
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Selection,
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/// <summary>
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/// This layer contains the text and inline UI elements.
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/// </summary>
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/// <remarks>This layer is between the Selection and the Caret layers.</remarks>
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Text,
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/// <summary>
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/// This layer contains the blinking caret.
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/// </summary>
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/// <remarks>This layer is above the Text layer.</remarks>
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Caret
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}
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/// <summary>
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/// Specifies where a new layer is inserted, in relation to an old layer.
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/// </summary>
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internal enum LayerInsertionPosition
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{
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/// <summary>
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/// The new layer is inserted below the specified layer.
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/// </summary>
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Below,
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/// <summary>
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/// The new layer replaces the specified layer. The old layer is removed
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/// from the <see cref="TextView.Layers"/> collection.
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/// </summary>
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Replace,
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/// <summary>
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/// The new layer is inserted above the specified layer.
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/// </summary>
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Above
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}
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internal sealed class LayerPosition : IComparable<LayerPosition>
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{
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internal readonly KnownLayer KnownLayer;
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internal readonly LayerInsertionPosition Position;
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internal LayerPosition(KnownLayer knownLayer, LayerInsertionPosition position)
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{
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KnownLayer = knownLayer;
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Position = position;
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}
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[SuppressMessage("ReSharper", "ImpureMethodCallOnReadonlyValueField")]
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public int CompareTo(LayerPosition other)
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{
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var r = KnownLayer.CompareTo(other.KnownLayer);
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return r != 0 ? r : Position.CompareTo(other.Position);
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}
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}
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} |