private static StringFormatDataTemplate Create(DataTemplate contentTemplate, string format, CultureInfo culture)
{
// We are using a converter to format the target value instead of using the
// ContentPresenter.ContentStringFormat or Binding.StringFormat property because
// it is not applied if a ContentPresenter.ContentTemplate is given or if the binding is
// not targeting a string property.
var template = new StringFormatDataTemplate(contentTemplate);
var control = new FrameworkElementFactory(typeof(ContentPresenter));
var binding = new Binding();
binding.Path = new PropertyPath(FrameworkElement.DataContextProperty);
binding.RelativeSource = RelativeSource.TemplatedParent;
binding.Converter = s_converter;
binding.ConverterParameter = format;
binding.ConverterCulture = culture;
control.SetValue(ContentPresenter.ContentTemplateProperty, contentTemplate);
control.SetValue(ContentPresenter.ContentProperty, binding);
template.VisualTree = control;
template.Seal();
return(template);
}
internal override DataTemplate GetCellStringFormatDataTemplate(DataTemplate contentTemplate)
{
// parentColumn is verified to be not null in the calling method
var parentColumn = this.ParentColumn;
var format = parentColumn.CellContentStringFormat;
Debug.Assert(!string.IsNullOrEmpty(format));
return(StringFormatDataTemplate.Get(contentTemplate, format, parentColumn.GetCulture()));
}
internal override DataTemplate GetCellStringFormatDataTemplate(DataTemplate contentTemplate)
{
var parentColumn = this.ParentColumn;
Debug.Assert(parentColumn != null);
var format = parentColumn.CellContentStringFormat;
Debug.Assert(!string.IsNullOrEmpty(format));
return(StringFormatDataTemplate.Get(contentTemplate, format, parentColumn.GetCulture()));
}
internal Entry(StringFormatDataTemplate template, string format, CultureInfo culture)
{
Debug.Assert(format != null);
if (template != null)
{
m_template = new WeakReference(template);
}
m_format = format;
m_culture = culture;
}
internal static StringFormatDataTemplate Get(DataTemplate contentTemplate, string format, CultureInfo culture)
{
if (string.IsNullOrEmpty(format))
{
throw new ArgumentException("The format must be non empty.", "format");
}
lock ((( ICollection )s_templates).SyncRoot)
{
int insertionIndex = 0;
bool cleanUp = false;
StringFormatDataTemplate template = null;
if (s_templates.Count > 0)
{
var lookup = new Entry(format, culture);
insertionIndex = s_templates.BinarySearch(lookup, s_comparer);
if (insertionIndex >= 0)
{
for (int i = insertionIndex; i < s_templates.Count; i++)
{
var item = s_templates[i];
if (s_comparer.Compare(lookup, item) != 0)
{
break;
}
var target = item.Template;
if (target == null)
{
cleanUp = true;
}
else
{
Debug.Assert(object.Equals(item.Format, format) && object.Equals(item.Culture, culture));
if (target.m_contentTemplate == contentTemplate)
{
template = target;
break;
}
}
}
}
else
{
insertionIndex = ~insertionIndex;
cleanUp = (insertionIndex < s_templates.Count) && (s_templates[insertionIndex].Template == null);
}
}
if (template == null)
{
template = StringFormatDataTemplate.Create(contentTemplate, format, culture);
s_templates.Insert(insertionIndex, new Entry(template, format, culture));
}
if (cleanUp)
{
StringFormatDataTemplate.CleanUpCache();
}
Debug.Assert(template != null);
return(template);
}
}