84 lines
3.0 KiB
C#
84 lines
3.0 KiB
C#
/*
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Copyright (C) 2014-2019 de4dot@gmail.com
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This file is part of dnSpy
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dnSpy is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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dnSpy is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with dnSpy. If not, see <http://www.gnu.org/licenses/>.
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*/
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using System;
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using System.ComponentModel.Composition;
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using Microsoft.VisualStudio.Text.Operations;
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using Microsoft.VisualStudio.Utilities;
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namespace dnSpy.Text.Operations {
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[Export(typeof(ITextUndoHistoryRegistry))]
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sealed class TextUndoHistoryRegistry : ITextUndoHistoryRegistry {
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static readonly object textUndoHistoryKey = typeof(ITextUndoHistory);
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public void AttachHistory(object context, ITextUndoHistory history) {
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if (context is null)
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throw new ArgumentNullException(nameof(context));
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if (history is null)
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throw new ArgumentNullException(nameof(history));
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var propertyOwner = context as IPropertyOwner;
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if (propertyOwner is null)
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throw new ArgumentException();
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if (!(history is TextUndoHistory))
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throw new ArgumentException();
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// VS also doesn't support it
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throw new NotSupportedException();
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}
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public ITextUndoHistory GetHistory(object context) {
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if (context is null)
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throw new ArgumentNullException(nameof(context));
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var propertyOwner = context as IPropertyOwner;
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if (propertyOwner is null)
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throw new ArgumentException();
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if (propertyOwner.Properties.TryGetProperty(textUndoHistoryKey, out TextUndoHistory history))
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return history;
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throw new ArgumentException();
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}
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public ITextUndoHistory RegisterHistory(object context) {
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if (context is null)
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throw new ArgumentNullException(nameof(context));
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var propertyOwner = context as IPropertyOwner;
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if (propertyOwner is null)
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throw new ArgumentException();
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return propertyOwner.Properties.GetOrCreateSingletonProperty(textUndoHistoryKey, () => new TextUndoHistory(propertyOwner));
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}
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public void RemoveHistory(ITextUndoHistory history) {
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if (history is null)
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throw new ArgumentException();
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var historyImpl = history as TextUndoHistory;
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if (historyImpl is null)
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throw new ArgumentException();
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historyImpl.PropertyOwner.Properties.RemoveProperty(textUndoHistoryKey);
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historyImpl.Dispose();
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}
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public bool TryGetHistory(object context, out ITextUndoHistory history) {
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if (context is null)
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throw new ArgumentNullException(nameof(context));
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var propertyOwner = context as IPropertyOwner;
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if (propertyOwner is null)
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throw new ArgumentException();
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return propertyOwner.Properties.TryGetProperty(textUndoHistoryKey, out history);
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}
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}
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}
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