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using System.Collections.Generic;
namespace System.Windows
{
public interface IDataObject
{
bool GetDataPresent(string format, bool autoConvert);
bool GetDataPresent(Type format);
bool GetDataPresent(string format);
object GetData(string format);
object GetData(string format, bool autoConvert);
string[] GetFormats();
}
public sealed class DataObject : IDataObject
{
public readonly struct DataItem
{
public readonly string Format;
public readonly object Data;
public DataItem (string format, object data)
{
Format = format;
Data = data;
}
}
readonly List<DataItem> items = new List<DataItem>(4);
public IReadOnlyList<DataItem> Items => items;
public void SetData(string format, object data)
=> items.Add(new DataItem(format, data));
public void SetText(string textData)
=> SetText(textData, TextDataFormat.UnicodeText);
public void SetText(string textData, TextDataFormat format)
=> SetData(DataFormats.ConvertToDataFormats(format), textData);
public bool GetDataPresent(Type format)
{
if (format == typeof(string))
return GetDataPresent(DataFormats.Text);
return GetDataPresent(format.FullName);
}
public bool GetDataPresent(string format)
=> GetDataPresent(format, true);
public bool GetDataPresent(string format, bool autoConvert)
{
foreach (var item in items)
{
if (string.Equals(item.Format, format, StringComparison.OrdinalIgnoreCase))
return true;
}
return false;
}
public object GetData(string format)
=> GetData(format, true);
public object GetData(string format, bool autoConvert)
{
foreach (var item in items)
{
if (string.Equals(item.Format, format, StringComparison.OrdinalIgnoreCase))
{
if (item.Data is string tsv &&
string.Equals(item.Format, DataFormats.CommaSeparatedValue))
return tsv.Replace('\t', ',');
return item.Data;
}
}
return null;
}
public string[] GetFormats()
{
var formats = new string[items.Count];
for (int i = 0; i < items.Count; i++)
formats[i] = items[i].Format;
return formats;
}
}
}
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