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/*
* GNU AFFERO GENERAL PUBLIC LICENSE
* Version 3, 19 November 2007
* Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
* Everyone is permitted to copy and distribute verbatim copies
* of this license document, but changing it is not allowed.
*/
using System;
using System.Collections;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Diagnostics;
using System.Drawing;
using System.Linq;
using UVtools.Core.FileFormats;
using UVtools.Core.Layers;
using UVtools.Core.Objects;
using UVtools.Core.Operations;
namespace UVtools.Core.Managers
{
public sealed class ClipboardItem : List<Layer>
{
private Operation _operation;
#region Properties
/// <summary>
/// Gets the LayerCount for this clip
/// </summary>
public uint LayerCount { get; }
/// <summary>
/// Gets the LayerHeight for this clip
/// </summary>
public float LayerHeight { get; }
/// <summary>
/// Gets the Resolution for this clip
/// </summary>
public Size Resolution { get; }
/// <summary>
/// Gets the description of this operation
/// </summary>
public string Description { get; set; }
public bool IsFullBackup { get; set; }
public Operation Operation
{
get => _operation;
set
{
_operation = value;
_operation.ImportedFrom = Operation.OperationImportFrom.Undo;
}
}
#endregion
#region Constructor
public ClipboardItem(FileFormat slicerFile, Operation operation, bool isFullBackup = false) : this(slicerFile, string.Empty, isFullBackup)
{
Operation = operation;
string description = operation.ToString();
if (!description.StartsWith(operation.Title)) description = $"{operation.Title}: {description}";
Description = description;
}
public ClipboardItem(FileFormat slicerFile, string description = null, bool isFullBackup = false)
{
LayerCount = slicerFile.LayerCount;
LayerHeight = slicerFile.LayerHeight;
Resolution = slicerFile.Resolution;
Description = description;
IsFullBackup = isFullBackup;
}
#endregion
#region Methods
public override string ToString()
{
return $"{(IsFullBackup ? "* " : "")}{Description} ({Count})";
}
#endregion
}
public sealed class ClipboardManager : BindableBase, IList<ClipboardItem>
{
#region Properties
public RangeObservableCollection<ClipboardItem> Items { get; } = new();
public FileFormat SlicerFile { get; set; }
private int _currentIndex = -1;
private Layer[] _snapshotLayers;
private bool _reallocatedLayerCount;
private bool _suppressRestore;
/// <summary>
/// Gets the index of current item
/// </summary>
public int CurrentIndex {
get => _currentIndex;
set
{
if (_currentIndex == value) return;
if (value < -1) value = -1;
if (value >= Count) value = Count-1;
var oldIndex = _currentIndex;
_currentIndex = value;
//if (!RaiseAndSetIfChanged(ref _currentIndex, value)) return;
if (value >= 0 && !SuppressRestore)
{
ReallocatedLayerCount = false;
int dir = oldIndex < _currentIndex ? 1 : -1;
for (int i = oldIndex + dir; i >= 0 && i < Count; i += dir)
{
var clip = this[i];
Layer[] layers;
if (clip.IsFullBackup)
{
if(!_reallocatedLayerCount && SlicerFile.LayerCount != clip.Count) ReallocatedLayerCount = true;
layers = clip.ToArray();
}
else
{
layers = SlicerFile.LayerManager.Layers.ToArray();
if (SlicerFile.LayerCount != clip.LayerCount) // Need resize layer manager
{
//layers = SlicerFile.LayerManager.ReallocateNew(clip.LayerCount);
layers = SlicerFile.LayerManager.ReallocateNew(clip.LayerCount);
ReallocatedLayerCount = true;
}
foreach (var layer in clip)
{
layers[layer.Index] = layer;
}
}
if (SlicerFile.LayerHeight != clip.LayerHeight)
{
SlicerFile.LayerHeight = clip.LayerHeight;
}
if (SlicerFile.Resolution != clip.Resolution)
{
SlicerFile.Resolution = clip.Resolution;
}
SlicerFile.SuppressRebuildPropertiesWork(() =>
{
SlicerFile.LayerManager.Layers = Layer.CloneLayers(layers);
});
if (i == _currentIndex) break;
}
}
RaisePropertyChanged();
RaisePropertyChanged(nameof(CurrentIndexCountStr));
RaisePropertyChanged(nameof(CanUndo));
RaisePropertyChanged(nameof(CanRedo));
return;
}
}
public string CurrentIndexCountStr => (CurrentIndex + 1).ToString().PadLeft(Count.ToString().Length, '0');
public bool SuppressRestore
{
get => _suppressRestore;
set => RaiseAndSetIfChanged(ref _suppressRestore, value);
}
public bool ReallocatedLayerCount
{
get => _reallocatedLayerCount;
set => RaiseAndSetIfChanged(ref _reallocatedLayerCount, value);
}
public Layer[] SnapshotLayers
{
get => _snapshotLayers;
private set => RaiseAndSetIfChanged(ref _snapshotLayers, value);
}
public ClipboardItem CurrentClip => _currentIndex < 0 || _currentIndex >= Count ? null : this[_currentIndex];
public bool CanUndo => CurrentIndex < Count - 1;
public bool CanRedo => CurrentIndex > 0;
#endregion
#region Singleton
private static readonly Lazy<ClipboardManager> InstanceHolder =
new(() => new ClipboardManager());
public static ClipboardManager Instance => InstanceHolder.Value;
#endregion
#region Constructor
private ClipboardManager() { }
#endregion
#region List Implementation
public IEnumerator<ClipboardItem> GetEnumerator() => Items.GetEnumerator();
IEnumerator IEnumerable.GetEnumerator() => GetEnumerator();
public void Add(ClipboardItem item) => Items.Add(item);
public void Clear()
{
Items.Clear();
CurrentIndex = -1;
}
public void Clear(bool keepOriginal)
{
if (!keepOriginal)
{
Clear();
return;
}
if (Count == 0) return;
Init(SlicerFile);
}
public bool Contains(ClipboardItem item) => Items.Contains(item);
public void CopyTo(ClipboardItem[] array, int arrayIndex) => Items.CopyTo(array, arrayIndex);
public bool Remove(ClipboardItem item) => Items.Remove(item);
public int Count => Items.Count;
public bool IsReadOnly => false;
public int IndexOf(ClipboardItem item) => Items.IndexOf(item);
public void Insert(int index, ClipboardItem item) => Items.Insert(index, item);
public void RemoveAt(int index) => Items.RemoveAt(index);
public ClipboardItem this[int index]
{
get => Items[index];
set => Items[index] = value;
}
#endregion
#region Methods
public void SuppressRestoreWork(Action action)
{
try
{
SuppressRestore = true;
action.Invoke();
}
catch (Exception e)
{
Debug.WriteLine(e);
throw;
}
finally
{
SuppressRestore = false;
}
}
/// <summary>
/// Clears the manager
/// </summary>
public void Reset() => Init(null);
/// <summary>
/// Clears and init clipboard
/// </summary>
/// <param name="slicerFile"></param>
public void Init(FileFormat slicerFile)
{
Clear();
SlicerFile = slicerFile;
if (slicerFile is null || slicerFile.DecodeType == FileFormat.FileDecodeType.Partial) return;
SuppressRestoreWork(() =>
{
var clip = new ClipboardItem(SlicerFile, "Original layers", true);
clip.AddRange(SlicerFile.LayerManager.CloneLayers());
Add(clip);
slicerFile.SuppressRebuildPropertiesWork(() => CurrentIndex = 0);
});
}
/// <summary>
/// Snapshot layers and prepare manager to collect modified layers with <see cref="Clip"/>
/// </summary>
public void Snapshot(Layer[] layers = null)
{
SnapshotLayers = layers ?? SlicerFile.LayerManager.CloneLayers();
}
public void RestoreSnapshot()
{
if (_snapshotLayers is null) return;
SlicerFile.LayerManager.Layers = _snapshotLayers;
SnapshotLayers = null;
}
/// <summary>
/// Collect differences and create a clip
/// </summary>
public ClipboardItem Clip(string description = null, Layer[] layers = null, bool doFullBackup = false)
{
ClipboardItem safeClip = null;
if (!doFullBackup)
{
if (layers is not null) Snapshot(layers);
if (_snapshotLayers is null) throw new InvalidOperationException("A snapshot is required before perform a clip");
if (_snapshotLayers.Length != SlicerFile.LayerCount)
{
doFullBackup = true; // Force full backup when layer count changes
if (Count > 0 && !this[0].IsFullBackup)
{
safeClip = new ClipboardItem(SlicerFile, "Fail-safe full backup", true);
safeClip.AddRange(_snapshotLayers);
}
//Insert(0, safeClip);
}
}
var clip = new ClipboardItem(SlicerFile, description, doFullBackup);
if (doFullBackup)
{
clip.AddRange(SlicerFile.LayerManager.CloneLayers());
}
else
{
int layerIndex = 0;
for (;
layerIndex < SlicerFile.LayerCount
&& layerIndex < _snapshotLayers.Length;
layerIndex++)
{
//if(SnapshotLayers.Count - 1 < layerIndex) break;
if (_snapshotLayers[layerIndex].Equals(SlicerFile[layerIndex])) continue;
clip.Add(SlicerFile[layerIndex].Clone());
}
// Collect leftovers from snapshot
// This happens when current state has less layers then the snapshot/previous
// So we need to preserve them
for (; layerIndex < SlicerFile.LayerCount; layerIndex++)
{
clip.Add(SlicerFile[layerIndex].Clone());
}
if (clip.Count == SlicerFile.LayerCount)
{
clip.IsFullBackup = true;
}
}
SnapshotLayers = null;
if (clip.Count == 0)
{
if(Count > 0 && this[0].LayerCount == clip.LayerCount)
return null;
}
SuppressRestoreWork(() =>
{
var oldCurrentIndex = _currentIndex;
CurrentIndex = -1;
// Remove all redo's for integrity
for (int i = oldCurrentIndex - 1; i >= 0; i--)
{
//if(this[i].IsFullBackup) continue; // Full backups can survive
RemoveAt(i);
}
if (safeClip is not null)
{
Insert(0, safeClip);
}
Insert(0, clip);
CurrentIndex = 0;
});
return clip;
}
/// <summary>
/// Collect differences and create a clip
/// </summary>
public ClipboardItem Clip(Operation operation, Layer[] layersSnapshot = null, bool doFullBackup = false)
{
string description = operation.ToString();
if (!description.StartsWith(operation.Title)) description = $"{operation.Title}: {description}";
var clip = Clip(description, layersSnapshot, doFullBackup);
if (clip is null) return null;
clip.Operation = operation;
return clip;
}
public void Undo()
{
if (!CanUndo) return;
CurrentIndex++;
}
public void Redo()
{
if (!CanRedo) return;
CurrentIndex--;
}
public void SetToOldest() => CurrentIndex = Count-1;
public void SetToNewest() => CurrentIndex = 0;
#endregion
}
}
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