mirror of
https://github.com/greenshot/greenshot.git
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65 lines
2.0 KiB
C#
65 lines
2.0 KiB
C#
/*
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* Greenshot - a free and open source screenshot tool
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* Copyright (C) 2007-2021 Thomas Braun, Jens Klingen, Robin Krom
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*
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* For more information see: http://getgreenshot.org/
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* The Greenshot project is hosted on GitHub https://github.com/greenshot/greenshot
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*
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* This program 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 1 of the License, or
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* (at your option) any later version.
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*
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* This program 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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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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using Greenshot.Drawing;
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using GreenshotPlugin.Interfaces.Drawing;
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namespace Greenshot.Memento {
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/// <summary>
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/// The TextChangeMemento makes it possible to undo-redo an IDrawableContainer move
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/// </summary>
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public class TextChangeMemento : IMemento {
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private TextContainer _textContainer;
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private readonly string _oldText;
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public TextChangeMemento(TextContainer textContainer) {
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_textContainer = textContainer;
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_oldText = textContainer.Text;
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}
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public void Dispose() {
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Dispose(true);
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}
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protected virtual void Dispose(bool disposing) {
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if (disposing) {
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_textContainer = null;
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}
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}
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public bool Merge(IMemento otherMemento) {
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if (otherMemento is not TextChangeMemento other) return false;
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return other._textContainer.Equals(_textContainer);
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}
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public IMemento Restore() {
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// Before
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_textContainer.Invalidate();
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TextChangeMemento oldState = new TextChangeMemento(_textContainer);
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_textContainer.ChangeText(_oldText, false);
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// After
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_textContainer.Invalidate();
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return oldState;
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}
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}
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}
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