private static Hyperlink CreateHyperlink(Entity entity, TwStringInfo text)
{
var link = new Hyperlink()
{
Cursor = Cursors.Hand,
CommandParameter = entity,
};
switch (entity)
{
case UserMentionEntity mention:
link.Inlines.Add(text.Slice(mention.StartIndex, mention.EndIndex));
break;
case MediaEntity media:
link.Inlines.Add(media.DisplayUrl);
break;
case UrlEntity url:
link.Inlines.Add(url.DisplayUrl);
break;
case SymbolEntity symbol:
link.Inlines.Add(text.Slice(symbol.StartIndex, symbol.EndIndex));
break;
}
return(link);
}
private static async void StatusInfoChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
var textBlock = d as TextBlock;
if (textBlock == null)
{
return;
}
textBlock.Inlines.Clear();
var status = e.NewValue as StatusInfo;
if (status == null)
{
return;
}
var entities = status.GetEntities()
.OrderBy(entity => entity.Indices[0])
.ToArray();
var text = new TwStringInfo(status.Text);
int textLength = text.Length;
var inlines = textBlock.Inlines;
if (entities.Length == 0)
{
inlines.Add(status.Text);
}
else
{
await App.Current.Dispatcher.InvokeAsync(() =>
{
// リンク付きツイートの作成
// ([テキスト])[リンク][テキスト][リンク][テキスト]....[リンク]([テキスト]) の順に生成する
int endIndex;
var entity = entities[0];
if (entity.StartIndex != 0)
{
inlines.Add(text.Slice(0, entity.StartIndex));
}
for (int i = 0; i < entities.Length; i++)
{
entity = entities[i];
inlines.Add(CreateHyperlink(entity, text));
endIndex = entity.EndIndex;
if (endIndex <= textLength)
{
if (entities.Length > i + 1)
{
inlines.Add(text.Slice(endIndex, entities[i + 1].StartIndex));
}
else
{
inlines.Add(text.Slice(endIndex, textLength));
}
}
else
{
break;
}
}
});
}
// text.Dispose();
text = null;
}
