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Diffstat (limited to 'main/src/core/MonoDevelop.Core/MonoDevelop.Core.Text/TextChangeEventArgs.cs')
| -rw-r--r-- | main/src/core/MonoDevelop.Core/MonoDevelop.Core.Text/TextChangeEventArgs.cs | 135 |
1 files changed, 135 insertions, 0 deletions
diff --git a/main/src/core/MonoDevelop.Core/MonoDevelop.Core.Text/TextChangeEventArgs.cs b/main/src/core/MonoDevelop.Core/MonoDevelop.Core.Text/TextChangeEventArgs.cs new file mode 100644 index 0000000000..ccd4033844 --- /dev/null +++ b/main/src/core/MonoDevelop.Core/MonoDevelop.Core.Text/TextChangeEventArgs.cs @@ -0,0 +1,135 @@ +// +// TextChangeEventArgs.cs +// +// Author: +// Mike Krüger <mkrueger@xamarin.com> +// +// Copyright (c) 2014 Xamarin Inc. (http://xamarin.com) +// +// Permission is hereby granted, free of charge, to any person obtaining a copy +// of this software and associated documentation files (the "Software"), to deal +// in the Software without restriction, including without limitation the rights +// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell +// copies of the Software, and to permit persons to whom the Software is +// furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN +// THE SOFTWARE. +using System; + +namespace MonoDevelop.Core.Text +{ + /// <summary> + /// Describes a change of the document text. + /// This class is thread-safe. + /// </summary> + [Serializable] + public class TextChangeEventArgs : EventArgs + { + readonly int offset; + readonly ITextSource removedText; + readonly ITextSource insertedText; + + /// <summary> + /// The offset at which the change occurs. + /// </summary> + public int Offset { + get { return offset; } + } + + /// <summary> + /// The text that was removed. + /// </summary> + public ITextSource RemovedText { + get { return removedText; } + } + + /// <summary> + /// The number of characters removed. + /// </summary> + public int RemovalLength { + get { return removedText.Length; } + } + + /// <summary> + /// The text that was inserted. + /// </summary> + public ITextSource InsertedText { + get { return insertedText; } + } + + /// <summary> + /// The number of characters inserted. + /// </summary> + public int InsertionLength { + get { return insertedText.Length; } + } + + /// <summary> + /// InsertionLength - RemovalLength + /// </summary> + public int ChangeDelta { + get { + return InsertionLength - RemovalLength; + } + } + + /// <summary> + /// Creates a new TextChangeEventArgs object. + /// </summary> + public TextChangeEventArgs(int offset, string removedText, string insertedText) + { + if (offset < 0) + throw new ArgumentOutOfRangeException("offset", offset, "offset must not be negative"); + this.offset = offset; + this.removedText = removedText != null ? new StringTextSource(removedText) : StringTextSource.Empty; + this.insertedText = insertedText != null ? new StringTextSource(insertedText) : StringTextSource.Empty; + } + + /// <summary> + /// Creates a new TextChangeEventArgs object. + /// </summary> + public TextChangeEventArgs(int offset, ITextSource removedText, ITextSource insertedText) + { + if (offset < 0) + throw new ArgumentOutOfRangeException("offset", offset, "offset must not be negative"); + this.offset = offset; + this.removedText = removedText ?? StringTextSource.Empty; + this.insertedText = insertedText ?? StringTextSource.Empty; + } + + /// <summary> + /// Gets the new offset where the specified offset moves after this document change. + /// </summary> + public virtual int GetNewOffset(int offset) + { + if (offset >= this.Offset && offset <= this.Offset + this.RemovalLength) { +// if (movementType == AnchorMovementType.BeforeInsertion) +// return this.Offset; +// else + return this.Offset + this.InsertionLength; + } else if (offset > this.Offset) { + return offset + this.InsertionLength - this.RemovalLength; + } else { + return offset; + } + } + + /// <summary> + /// Creates TextChangeEventArgs for the reverse change. + /// </summary> + public virtual TextChangeEventArgs Invert() + { + return new TextChangeEventArgs(offset, insertedText, removedText); + } + } +} + |