102 lines
3.3 KiB
C#
102 lines
3.3 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.Diagnostics.CodeAnalysis;
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using Unity.CodeEditor.Document;
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namespace Unity.CodeEditor.Rendering
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{
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/// <summary>
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/// Represents a collapsed line section.
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/// Use the Uncollapse() method to uncollapse the section.
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/// </summary>
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internal sealed class CollapsedLineSection
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{
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private readonly HeightTree _heightTree;
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#if DEBUG
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internal string Id;
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private static int _nextId;
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#else
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const string Id = "";
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#endif
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internal CollapsedLineSection(HeightTree heightTree, DocumentLine start, DocumentLine end)
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{
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_heightTree = heightTree;
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Start = start;
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End = end;
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#if DEBUG
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unchecked {
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Id = " #" + (_nextId++);
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}
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#endif
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}
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/// <summary>
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/// Gets if the document line is collapsed.
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/// This property initially is true and turns to false when uncollapsing the section.
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/// </summary>
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internal bool IsCollapsed => Start != null;
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/// <summary>
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/// Gets the start line of the section.
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/// When the section is uncollapsed or the text containing it is deleted,
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/// this property returns null.
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/// </summary>
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internal DocumentLine Start { get; set; }
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/// <summary>
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/// Gets the end line of the section.
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/// When the section is uncollapsed or the text containing it is deleted,
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/// this property returns null.
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/// </summary>
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internal DocumentLine End { get; set; }
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/// <summary>
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/// Uncollapses the section.
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/// This causes the Start and End properties to be set to null!
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/// Does nothing if the section is already uncollapsed.
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/// </summary>
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internal void Uncollapse()
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{
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if (Start == null)
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return;
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if (!_heightTree.IsDisposed) {
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_heightTree.Uncollapse(this);
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#if DEBUG
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_heightTree.CheckProperties();
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#endif
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}
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Start = null;
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End = null;
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}
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/// <summary>
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/// Gets a string representation of the collapsed section.
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/// </summary>
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[SuppressMessage("Microsoft.Globalization", "CA1305:SpecifyIFormatProvider", MessageId = "System.Int32.ToString")]
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public override string ToString()
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{
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return "[CollapsedSection" + Id + " Start=" + (Start != null ? Start.LineNumber.ToString() : "null")
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+ " End=" + (End != null ? End.LineNumber.ToString() : "null") + "]";
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}
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}
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} |