102 lines
3.6 KiB
C#
102 lines
3.6 KiB
C#
/*
|
|
Copyright (C) 2014-2019 de4dot@gmail.com
|
|
|
|
This file is part of dnSpy
|
|
|
|
dnSpy is free software: you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation, either version 3 of the License, or
|
|
(at your option) any later version.
|
|
|
|
dnSpy is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with dnSpy. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
using System;
|
|
using System.Collections.Generic;
|
|
using System.ComponentModel.Composition;
|
|
using System.Diagnostics;
|
|
using dnSpy.AsmEditor.Properties;
|
|
using dnSpy.AsmEditor.UndoRedo;
|
|
using dnSpy.Contracts.Hex;
|
|
|
|
namespace dnSpy.AsmEditor.Hex {
|
|
[Export(typeof(IHexBufferServiceListener))]
|
|
sealed class HexBufferUndoRedo : IHexBufferServiceListener {
|
|
internal static object UndoRedoObject = new object();
|
|
readonly IUndoCommandService undoCommandService;
|
|
|
|
[ImportingConstructor]
|
|
HexBufferUndoRedo(IUndoCommandService undoCommandService) => this.undoCommandService = undoCommandService;
|
|
|
|
void IHexBufferServiceListener.BufferCreated(HexBuffer buffer) => buffer.Changed += Buffer_Changed;
|
|
|
|
void IHexBufferServiceListener.BuffersCleared(IEnumerable<HexBuffer> buffers) {
|
|
foreach (var buffer in buffers)
|
|
buffer.Changed -= Buffer_Changed;
|
|
}
|
|
|
|
void Buffer_Changed(object? sender, HexContentChangedEventArgs e) {
|
|
if (e.EditTag == HexBufferUndoRedo.UndoRedoObject)
|
|
return;
|
|
var buffer = (HexBuffer)sender!;
|
|
var desc = dnSpy_AsmEditor_Resources.Hex_Undo_Message_InsertBytes;
|
|
var cmd = new HexBufferUndoCommand(buffer, e.Changes, e.BeforeVersion.ReiteratedVersionNumber, e.AfterVersion.ReiteratedVersionNumber, desc);
|
|
undoCommandService.Add(cmd);
|
|
}
|
|
}
|
|
|
|
sealed class HexBufferUndoCommand : IUndoCommand {
|
|
public string Description { get; }
|
|
|
|
readonly HexBuffer buffer;
|
|
readonly NormalizedHexChangeCollection changes;
|
|
readonly int beforeReiteratedVersionNumber;
|
|
readonly int afterReiteratedVersionNumber;
|
|
bool canExecute;
|
|
|
|
public HexBufferUndoCommand(HexBuffer buffer, NormalizedHexChangeCollection changes, int beforeReiteratedVersionNumber, int afterReiteratedVersionNumber, string description) {
|
|
this.buffer = buffer ?? throw new ArgumentNullException(nameof(buffer));
|
|
this.changes = changes ?? throw new ArgumentNullException(nameof(changes));
|
|
this.beforeReiteratedVersionNumber = beforeReiteratedVersionNumber;
|
|
this.afterReiteratedVersionNumber = afterReiteratedVersionNumber;
|
|
Description = description ?? throw new ArgumentNullException(nameof(description));
|
|
}
|
|
|
|
public IEnumerable<object> ModifiedObjects {
|
|
get { yield return buffer; }
|
|
}
|
|
|
|
public void Execute() {
|
|
// This instance gets created after the buffer has already been modified
|
|
// so don't exec this method the first time it gets called.
|
|
if (!canExecute) {
|
|
canExecute = true;
|
|
return;
|
|
}
|
|
using (var ed = buffer.CreateEdit(afterReiteratedVersionNumber, HexBufferUndoRedo.UndoRedoObject)) {
|
|
foreach (var change in changes) {
|
|
bool b = ed.Replace(change.OldPosition, change.NewData);
|
|
Debug.Assert(b);
|
|
}
|
|
ed.Apply();
|
|
}
|
|
}
|
|
|
|
public void Undo() {
|
|
using (var ed = buffer.CreateEdit(beforeReiteratedVersionNumber, HexBufferUndoRedo.UndoRedoObject)) {
|
|
foreach (var change in changes) {
|
|
bool b = ed.Replace(change.NewPosition, change.OldData);
|
|
Debug.Assert(b);
|
|
}
|
|
ed.Apply();
|
|
}
|
|
}
|
|
}
|
|
}
|