wehub-resource-sync
61 lines
1.9 KiB
C#
61 lines
1.9 KiB
C#
#nullable enable
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using T3.Editor.Gui.Interaction.Variations.Model;
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namespace T3.Editor.UiModel.Commands.Variations;
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/// <summary>
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/// Captures the <see cref="Variation.ActivationIndex"/> of a set of variations so a list reorder (which
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/// swaps indices live as rows cross) can be committed as a single undoable step. Mirrors
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/// <see cref="Graph.ModifyCanvasElementsCommand"/>, but for the activation index that now drives snapshot
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/// order instead of the canvas position.
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/// </summary>
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internal sealed class ModifyVariationIndicesCommand : ICommand
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{
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public string Name => "Reorder snapshots";
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public bool IsUndoable => true;
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internal ModifyVariationIndicesCommand(SymbolVariationPool pool, IReadOnlyList<Variation> variations)
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{
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_pool = pool;
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_entries = new Entry[variations.Count];
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for (var i = 0; i < variations.Count; i++)
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{
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var v = variations[i];
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_entries[i] = new Entry { Variation = v, OriginalIndex = v.ActivationIndex, NewIndex = v.ActivationIndex };
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}
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}
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/// <summary>Records the indices reached by the live reorder as the command's redo state.</summary>
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public void StoreCurrentValues()
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{
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foreach (var entry in _entries)
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entry.NewIndex = entry.Variation.ActivationIndex;
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}
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public void Do()
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{
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foreach (var entry in _entries)
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entry.Variation.ActivationIndex = entry.NewIndex;
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_pool.SaveVariationsToFile();
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}
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public void Undo()
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{
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foreach (var entry in _entries)
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entry.Variation.ActivationIndex = entry.OriginalIndex;
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_pool.SaveVariationsToFile();
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}
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private sealed class Entry
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{
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public Variation Variation = null!;
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public int OriginalIndex { get; init; }
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public int NewIndex { get; set; }
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}
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private readonly SymbolVariationPool _pool;
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private readonly Entry[] _entries;
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}
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