63 lines
2.4 KiB
C#
63 lines
2.4 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.Collections.Generic;
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using System.ComponentModel.Composition;
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using System.Linq;
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using dnSpy.AsmEditor.UndoRedo;
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using dnSpy.Contracts.Hex;
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namespace dnSpy.AsmEditor.Hex {
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[Export(typeof(IUndoableDocumentsProvider))]
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[Export(typeof(IHexBufferServiceListener))]
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sealed class HexUndoableDocumentsProvider : IUndoableDocumentsProvider, IHexBufferServiceListener {
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static readonly object undoObjectKey = new object();
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readonly Lazy<IHexBufferService> hexBufferService;
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[ImportingConstructor]
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HexUndoableDocumentsProvider(Lazy<IHexBufferService> hexBufferService) => this.hexBufferService = hexBufferService;
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IEnumerable<IUndoObject> IUndoableDocumentsProvider.GetObjects() => hexBufferService.Value.GetBuffers().Select(a => TryGetUndoObject(a)).Where(a => a is not null);
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IUndoObject? IUndoableDocumentsProvider.GetUndoObject(object obj) {
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if (obj is HexBuffer buffer)
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return TryGetUndoObject(buffer);
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return null;
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}
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bool IUndoableDocumentsProvider.OnExecutedOneCommand(IUndoObject obj) => TryGetHexBuffer(obj) is not null;
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object? IUndoableDocumentsProvider.GetDocument(IUndoObject obj) => TryGetHexBuffer(obj);
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internal static HexBuffer? TryGetHexBuffer(IUndoObject? iuo) => (iuo as UndoObject)?.Value as HexBuffer;
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static IUndoObject TryGetUndoObject(HexBuffer buffer) {
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buffer.Properties.TryGetProperty(undoObjectKey, out IUndoObject undoObject);
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return undoObject;
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}
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void IHexBufferServiceListener.BufferCreated(HexBuffer buffer) =>
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buffer.Properties.AddProperty(undoObjectKey, new UndoObject(buffer));
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void IHexBufferServiceListener.BuffersCleared(IEnumerable<HexBuffer> buffers) {
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foreach (var buffer in buffers)
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buffer.Properties.RemoveProperty(undoObjectKey);
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}
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}
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}
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