public List <EntityInfo> ExtractUrls(string text)
{
var result = new List <EntityInfo>();
if (!string.IsNullOrEmpty(text))
{
UrlExtractor.Extract(text, this.ExtractsUrlWithoutProtocol, this._tldDictionary, this._longestTldLength, this._shortestTldLength, result);
}
return(result);
}
public List <EntityInfo> ExtractEntities(string text)
{
var result = new List <EntityInfo>();
if (!string.IsNullOrEmpty(text))
{
UrlExtractor.Extract(text, this.ExtractsUrlWithoutProtocol, this._tldDictionary, this._longestTldLength, this._shortestTldLength, result);
HashtagExtractor.Extract(text, result);
MentionExtractor.Extract(text, true, result);
CashtagExtractor.Extract(text, result);
RemoveOverlappingEntities(result);
}
return(result);
}
public List <EntityInfo> ExtractHashtags(string text, bool checkUrlOverlap)
{
var result = new List <EntityInfo>();
if (!string.IsNullOrEmpty(text))
{
HashtagExtractor.Extract(text, result);
if (checkUrlOverlap && result.Count > 0)
{
UrlExtractor.Extract(text, this.ExtractsUrlWithoutProtocol, this._tldDictionary, this._longestTldLength, this._shortestTldLength, result);
RemoveOverlappingEntities(result);
result.RemoveAll(x => x.Type != EntityType.Hashtag);
}
}
return(result);
}
private void AppendText(DateTime dateTime, string sender, string senderInfo, string text, Color color)
{
// Create a textrange at the very end of the chat text box, extend the range with the new text
var timestampTextRange = new TextRange(chatTextBox.Document.ContentEnd, chatTextBox.Document.ContentEnd)
{
Text = string.Format("[{0}] ", dateTime)
};
// Colorize the timestamp
timestampTextRange.ApplyPropertyValue(TextElement.ForegroundProperty, new SolidColorBrush(color));
timestampTextRange.ApplyPropertyValue(TextElement.FontWeightProperty, FontWeights.Normal);
var senderTextRange = new TextRange(chatTextBox.Document.ContentEnd, chatTextBox.Document.ContentEnd)
{
Text = string.Format("{0}", sender)
};
// Colorize the sender and make it bold
senderTextRange.ApplyPropertyValue(TextElement.ForegroundProperty, new SolidColorBrush(color));
senderTextRange.ApplyPropertyValue(TextElement.FontWeightProperty, FontWeights.Bold);
var senderInfoTextRange = new TextRange(chatTextBox.Document.ContentEnd, chatTextBox.Document.ContentEnd)
{
Text = string.IsNullOrWhiteSpace(senderInfo) ? ": " : string.Format(" {0}: ", senderInfo)
};
// Colorize the sender info
senderInfoTextRange.ApplyPropertyValue(TextElement.ForegroundProperty, new SolidColorBrush(color));
senderInfoTextRange.ApplyPropertyValue(TextElement.FontWeightProperty, FontWeights.Normal);
// Try to extract URLs and make them clickable
foreach (var partialText in UrlExtractor.Extract(text))
{
if (partialText.Value != null)
{
var linkTextRange = new TextRange(chatTextBox.Document.ContentEnd, chatTextBox.Document.ContentEnd)
{
Text = partialText.Key
};
var link = new Hyperlink(linkTextRange.Start, linkTextRange.End);
link.NavigateUri = partialText.Value;
link.RequestNavigate += LinkRequestNavigate;
}
else
{
var regularTextRange = new TextRange(chatTextBox.Document.ContentEnd, chatTextBox.Document.ContentEnd)
{
Text = partialText.Key
};
// Colorize the text
regularTextRange.ApplyPropertyValue(TextElement.ForegroundProperty, new SolidColorBrush(color));
regularTextRange.ApplyPropertyValue(TextElement.FontWeightProperty, FontWeights.Normal);
}
}
// Add a new line and reset styles
var resetTextRange = new TextRange(chatTextBox.Document.ContentEnd, chatTextBox.Document.ContentEnd)
{
Text = Environment.NewLine
};
resetTextRange.ApplyPropertyValue(TextElement.FontWeightProperty, FontWeights.Normal);
// Scroll to end of chat text if ScrollLock isn't on
var scrollLock = (((ushort)GetKeyState(0x91)) & 0xffff) != 0;
if (!scrollLock)
{
chatTextBox.ScrollToEnd();
}
}