internal static HtmlFormatter <T> CreateForAnyEnumerable(bool includeInternals)
{
Func <T, IEnumerable> getKeys = null;
Func <T, IEnumerable> getValues = instance => (IEnumerable)instance;
var dictType =
typeof(T).GetAllInterfaces()
.FirstOrDefault(i => i.IsGenericType && i.GetGenericTypeDefinition() == typeof(IDictionary <,>))
??
typeof(T).GetAllInterfaces()
.FirstOrDefault(i => i == typeof(IDictionary));
if (dictType is not null)
{
var keysProperty = dictType.GetProperty("Keys");
getKeys = instance => (IEnumerable)keysProperty.GetValue(instance, null);
var valuesProperty = dictType.GetProperty("Values");
getValues = instance => (IEnumerable)valuesProperty.GetValue(instance, null);
}
return(new HtmlFormatter <T>(BuildTable));
bool BuildTable(T source, FormatContext context)
{
using var _ = context.IncrementTableDepth();
if (context.TableDepth > 1)
{
HtmlFormatter.FormatAndStyleAsPlainText(source, context);
return(true);
}
var(rowData, remainingCount) = getValues(source)
.Cast <object>()
.Select((v, i) => (v, i))
.TakeAndCountRemaining(Formatter.ListExpansionLimit);
if (rowData.Count == 0)
{
context.Writer.Write(i("(empty)"));
return(true);
}
var valuesByHeader = new Dictionary <string, Dictionary <int, object> >();
var headerToSortIndex = new Dictionary <string, (int, int)>();
var typesAreDifferent = false;
var types = new Dictionary <Type, int>();
foreach (var(value, index) in rowData)
{
IDictionary <string, object> keysAndValues;
if (value is { } &&
Formatter.GetPreferredFormatterFor(value.GetType(), HtmlFormatter.MimeType) is { } formatter&&
formatter.Type == typeof(object))
{
var destructurer = Destructurer.GetOrCreate(value?.GetType());
keysAndValues = destructurer.Destructure(value);
}
private static HtmlFormatter <T> CreateForSequence(bool includeInternals)
{
Type valueType = null;
Func <T, IEnumerable> getKeys = null;
Func <T, IEnumerable> getValues = instance => (IEnumerable)instance;
var dictionaryGenericType = typeof(T).GetInterfaces()
.FirstOrDefault(i => i.IsGenericType && i.GetGenericTypeDefinition() == typeof(IDictionary <,>));
var dictionaryObjectType = typeof(T).GetInterfaces()
.FirstOrDefault(i => i == typeof(IDictionary));
var enumerableGenericType = typeof(T).GetInterfaces()
.FirstOrDefault(i => i.IsGenericType && i.GetGenericTypeDefinition() == typeof(IEnumerable <>));
if (dictionaryGenericType != null || dictionaryObjectType != null)
{
var keysProperty = typeof(T).GetProperty("Keys");
getKeys = instance => (IEnumerable)keysProperty.GetValue(instance, null);
var valuesProperty = typeof(T).GetProperty("Values");
getValues = instance => (IEnumerable)valuesProperty.GetValue(instance, null);
if (dictionaryGenericType != null)
{
valueType = typeof(T).GenericTypeArguments[1];
}
}
else if (enumerableGenericType != null)
{
if (!enumerableGenericType.IsArray)
{
var genericTypeArguments = typeof(T).GenericTypeArguments;
if (genericTypeArguments.Length == 1)
{
valueType = genericTypeArguments[0];
}
}
}
var destructurer = valueType != null
? Destructurer.Create(valueType)
: null;
return(new HtmlFormatter <T>((instance, writer) =>
{
var index = 0;
IHtmlContent indexHeader = null;
Func <string> getIndex;
if (getKeys != null)
{
var keys = new List <string>();
foreach (var key in getKeys(instance))
{
keys.Add(key.ToString());
}
getIndex = () => keys[index];
indexHeader = th(i("key"));
}
else
{
getIndex = () => index.ToString();
indexHeader = th(i("index"));
}
var rows = new List <IHtmlContent>();
List <IHtmlContent> headers = null;
var values = getValues(instance);
foreach (var item in values)
{
if (index < Formatter.ListExpansionLimit)
{
if (destructurer == null)
{
if (item != null)
{
destructurer = Destructurer.Create(item.GetType());
}
else
{
destructurer = NonDestructurer.Instance;
}
}
var dictionary = destructurer.Destructure(item);
if (headers == null)
{
headers = new List <IHtmlContent>();
headers.Add(indexHeader);
headers.AddRange(dictionary.Keys
.Select(k => (IHtmlContent)th(k)));
}
var cells =
new IHtmlContent[]
{
td(getIndex().ToHtmlContent())
}
.Concat(
dictionary
.Values
.Select(v => (IHtmlContent)td(v)));
rows.Add(tr(cells));
index++;
}
else
{
var more = values switch
{
ICollection c => $"({c.Count - index} more)",
_ => "(more...)"
};
rows.Add(tr(td[colspan: $"{headers.Count}"](more)));
break;
}
}
var view = HtmlFormatter.Table(headers, rows);
view.WriteTo(writer, HtmlEncoder.Default);
}));
}
internal static HtmlFormatter <T> CreateForAnyEnumerable(bool includeInternals)
{
Func <T, IEnumerable> getKeys = null;
Func <T, IEnumerable> getValues = instance => (IEnumerable)instance;
var dictionaryGenericType = typeof(T).GetAllInterfaces()
.FirstOrDefault(i => i.IsGenericType && i.GetGenericTypeDefinition() == typeof(IDictionary <,>));
var dictionaryObjectType = typeof(T).GetAllInterfaces()
.FirstOrDefault(i => i == typeof(IDictionary));
if (dictionaryGenericType is not null || dictionaryObjectType is not null)
{
var dictType = (dictionaryGenericType ?? dictionaryObjectType);
var keysProperty = dictType.GetProperty("Keys");
getKeys = instance => (IEnumerable)keysProperty.GetValue(instance, null);
var valuesProperty = dictType.GetProperty("Values");
getValues = instance => (IEnumerable)valuesProperty.GetValue(instance, null);
}
return(new HtmlFormatter <T>(BuildTable));
bool BuildTable(FormatContext context, T source, TextWriter writer)
{
if (context.ContentThreshold < 1.0)
{
// This formatter refuses to produce nested tables.
return(false);
}
var innerContext = context.ReduceContent(FormatContext.NestedInTable);
var(rowData, remainingCount) = getValues(source)
.Cast <object>()
.Select((v, i) => (v, i))
.TakeAndCountRemaining(Formatter.ListExpansionLimit);
if (rowData.Count == 0)
{
writer.Write(i("(empty)"));
return(true);
}
var valuesByHeader = new Dictionary <string, Dictionary <int, object> >();
var headerToSortIndex = new Dictionary <string, (int, int)>();
bool typesAreDifferent = false;
var types = new Dictionary <Type, int>();
foreach (var(value, index) in rowData)
{
var destructurer = Destructurer.GetOrCreate(value?.GetType());
var destructured = destructurer.Destructure(value);
if (value is not null)
{
var type = value.GetType();
if (!types.ContainsKey(type))
{
types.Add(type, types.Count);
}
typesAreDifferent = types.Count > 1;
}
var typeIndex = (value is null) ? 0 : types[value.GetType()];
var pairIndex = 0;
foreach (var pair in destructured)
{
if (!headerToSortIndex.ContainsKey(pair.Key))
{
headerToSortIndex.Add(pair.Key, (typeIndex, pairIndex));
}
valuesByHeader
.GetOrAdd(pair.Key, key => new Dictionary <int, object>())
.Add(index, pair.Value);
pairIndex++;
}
}
var headers = new List <IHtmlContent>();
List <object> leftColumnValues;
if (getKeys is not null)
{
headers.Add(th(i("key")));
leftColumnValues = getKeys(source)
.Cast <object>()
.Take(rowData.Count)
.ToList();
}
else
{
headers.Add(th(i("index")));
leftColumnValues = Enumerable.Range(0, rowData.Count)
.Select(i => str(i.ToString()))
.Cast <object>()
.ToList();
}
if (typesAreDifferent)
{
headers.Insert(1, th(i("type")));
}
// Order the columns first by the *first* type to exhibit the
// property, then by the destructuring order within that type.
var valueKeys =
valuesByHeader.Keys
.OrderBy(x => headerToSortIndex[x])
.ToArray();
var valueKeysLimited =
valueKeys
.Take(Math.Max(0, HtmlFormatter.MaxProperties))
.ToArray();
headers.AddRange(valueKeysLimited.Select(k => (IHtmlContent)th(k)));
if (valueKeysLimited.Length < valueKeys.Length)
{
headers.Add((IHtmlContent)th(".."));
}
var rows = new List <IHtmlContent>();
for (var rowIndex = 0; rowIndex < rowData.Count; rowIndex++)
{
var rowValues = new List <object>
{
leftColumnValues[rowIndex]
};
if (typesAreDifferent)
{
var type = rowData[rowIndex].v?.GetType();
rowValues.Add(type);
}
foreach (var key in valueKeysLimited)
{
if (valuesByHeader[key].TryGetValue(rowIndex, out var cellData))
{
rowValues.Add(cellData);
}
else
{
rowValues.Add("");
}
}
// Note, embeds the values as arbitrary objects into the HTML content.
rows.Add(tr(rowValues.Select(r => td(embed(r, innerContext)))));
}
if (remainingCount > 0)
{
var more = $"({remainingCount} more)";
rows.Add(tr(td[colspan: $"{headers.Count}"](more)));
}
var table = HtmlFormatter.Table(headers, rows);
table.WriteTo(writer, HtmlEncoder.Default);
return(true);
}
}
