public override bool TryEvalulateAllLiterals(IFormattingInfo formattingInfo)
{
var format = formattingInfo.Format;
if (format == null)
{
return(false);
}
var parameters = format.Split('|', 4);
if (parameters.Count < 2)
{
return(false);
}
var itemFormat = parameters[0];
// Spacer
if (parameters.Count >= 1)
{
formattingInfo.Write(parameters[0], null);
}
// Last spacer
if (parameters.Count >= 3)
{
formattingInfo.Write(parameters[2], null);
}
// Two spacer
if (parameters.Count >= 4)
{
formattingInfo.Write(parameters[3], null);
}
if (!itemFormat.HasNested)
{
// The format is not nested,
// so we will treat it as an itemFormat:
var newItemFormat = FormatItemPool.GetFormat(m_SmartSettings, itemFormat.baseString, itemFormat.startIndex, itemFormat.endIndex, true);
var newPlaceholder = FormatItemPool.GetPlaceholder(m_SmartSettings, newItemFormat, itemFormat.startIndex, 0, itemFormat, itemFormat.endIndex);
newItemFormat.Items.Add(newPlaceholder);
itemFormat = newItemFormat;
}
formattingInfo.Write(itemFormat, null);
return(true);
}
public override bool TryEvaluateFormat(IFormattingInfo formattingInfo)
{
var format = formattingInfo.Format;
var current = formattingInfo.CurrentValue;
// This method needs the Highest priority so that it comes before the PluralLocalizationExtension and ConditionalExtension
// This extension requires at least IEnumerable
if (!(current is IEnumerable enumerable))
{
return(false);
}
// Ignore Strings, because they're IEnumerable.
// This issue might actually need a solution
// for other objects that are IEnumerable.
if (current is string)
{
return(false);
}
// If the object is IFormattable, ignore it
if (current is IFormattable)
{
return(false);
}
// This extension requires a | to specify the spacer:
if (format == null)
{
return(false);
}
var parameters = format.Split('|', 4);
if (parameters.Count < 2)
{
return(false);
}
// Grab all formatting options:
// They must be in one of these formats:
// itemFormat|spacer
// itemFormat|spacer|lastSpacer
// itemFormat|spacer|lastSpacer|twoSpacer
var itemFormat = parameters[0];
var spacer = parameters.Count >= 2 ? parameters[1].GetLiteralText() : "";
var lastSpacer = parameters.Count >= 3 ? parameters[2].GetLiteralText() : spacer;
var twoSpacer = parameters.Count >= 4 ? parameters[3].GetLiteralText() : lastSpacer;
if (!itemFormat.HasNested)
{
// The format is not nested,
// so we will treat it as an itemFormat:
var newItemFormat = FormatItemPool.GetFormat(m_SmartSettings, itemFormat.baseString, itemFormat.startIndex, itemFormat.endIndex, true);
var newPlaceholder = FormatItemPool.GetPlaceholder(m_SmartSettings, newItemFormat, itemFormat.startIndex, 0, itemFormat, itemFormat.endIndex);
newItemFormat.Items.Add(newPlaceholder);
itemFormat = newItemFormat;
}
// Let's buffer all items from the enumerable (to ensure the Count without double-enumeration):
List <object> bufferItems = null;
if (!(current is ICollection items))
{
bufferItems = ListPool <object> .Get();
foreach (var item in enumerable)
{
bufferItems.Add(item);
}
items = bufferItems;
}
var oldCollectionIndex = CollectionIndex; // In case we have nested arrays, we might need to restore the CollectionIndex
CollectionIndex = -1;
foreach (var item in items)
{
CollectionIndex += 1; // Keep track of the index
// Determine which spacer to write:
if (spacer == null || CollectionIndex == 0)
{
// Don't write the spacer.
}
else if (CollectionIndex < items.Count - 1)
{
formattingInfo.Write(spacer);
}
else if (CollectionIndex == 1)
{
formattingInfo.Write(twoSpacer);
}
else
{
formattingInfo.Write(lastSpacer);
}
// Output the nested format for this item:
formattingInfo.Write(itemFormat, item);
}
CollectionIndex = oldCollectionIndex; // Restore the CollectionIndex
if (bufferItems != null)
{
ListPool <object> .Release(bufferItems);
}
return(true);
}