public static void ReplaceWordAtPointer(TextPointer textPointer, string replacementWord)
{
textPointer.DeleteTextInRun(-GetWordCharactersBefore(textPointer).Count());
textPointer.DeleteTextInRun(GetWordCharactersAfter(textPointer).Count());
textPointer.InsertTextInRun(replacementWord);
}
private void RemoveLastWord()
{
int lastWordLength = GetLastWord().Length;
TextPointer deletePosition = CaretPosition.GetPositionAtOffset(-lastWordLength, LogicalDirection.Forward);
deletePosition.DeleteTextInRun(lastWordLength);
}
private void ReplaceText(string text, string replaceText)
{
TextBox textBox = textBoxBase as TextBox;
if (textBox != null)
{
StringBuilder sb = new StringBuilder(text);
int removeStart = textBox.CaretIndex - text.Length;
sb.Remove(removeStart, text.Length);
sb.Insert(removeStart, replaceText);
textBox.Text = sb.ToString();
textBox.CaretIndex = removeStart + replaceText.Length;
}
else if (textBoxBase is RichTextBox)
{
RichTextBox richTextBox = textBoxBase as RichTextBox;
if (richTextBox.CaretPosition.LogicalDirection == LogicalDirection.Backward)
{
richTextBox.CaretPosition = richTextBox.CaretPosition.GetPositionAtOffset(0, LogicalDirection.Forward);
}
TextPointer removePointer = richTextBox.CaretPosition.GetPositionAtOffset(-text.Length);
removePointer.DeleteTextInRun(text.Length);
removePointer.InsertTextInRun(replaceText);
richTextBox.CaretPosition = removePointer;
}
return;
}
public static void DeleteRunsAndInlinecontainers(this FlowDocument doc, TextPointer start = null, TextPointer end = null)
{
for (TextPointer position = start;
position != null && position.CompareTo(end) <= 0;
position = position.GetNextContextPosition(LogicalDirection.Forward))
{
if (position.GetPointerContext(LogicalDirection.Forward) == TextPointerContext.ElementEnd)
{
//
}
else
{
TextPointer nextPosition = position.GetNextContextPosition(LogicalDirection.Forward);
if (position.Parent is Run)
{
Run run = position.Parent as Run;
TextPointer p1 = (position.CompareTo(run.ContentStart) >= 0) ? position : run.ContentStart;
TextPointer p2 = (nextPosition.CompareTo(end) <= 0) ? nextPosition : end;
int x2 = -p2.GetOffsetToPosition(p1);
p1.DeleteTextInRun(x2);
}
else if (position.Parent is InlineUIContainer)
{
InlineUIContainer inline = position.Parent as InlineUIContainer;
(inline.Parent as Paragraph).Inlines.Remove(inline);
}
}
}
}
/// <summary>
/// 删除字符
/// </summary>
void DeleteChar()
{
TextPointer tpEnd = this.richBox.CaretPosition;
tpEnd.DeleteTextInRun(-_counter);
_counter = 0;
}
private void PreviewKeyDownHandler(object sender, KeyEventArgs e)
{
// Are we seeing a key press before preceding character is processed?
if (DelayActionFacility && changingText)
{
if (delayAction == null)
{
// Not done processing previous character --
// -- set to redo in TextChanged event.
delayAction = new Action(() => { PreviewKeyDownHandler(this, e); });
}
return;
}
// See if we're at the end of a word
if (delimiterKeys.Contains(e.Key))
{
string word = GetPrecedingText();
// Is the word an abbreviation?
if (abbreviations.ContainsKey(word.ToUpper()))
{
TextPointer pointer = textbox1.CaretPosition.GetPositionAtOffset(-word.Length);
if (pointer.LogicalDirection == LogicalDirection.Backward) // change direction, if needed
{
pointer = pointer.GetPositionAtOffset(0, LogicalDirection.Forward);
textbox1.CaretPosition = pointer;
}
// replace abbreviation w/expansion
pointer.DeleteTextInRun(word.Length);
pointer.InsertTextInRun(abbreviations[word.ToUpper()]);
}
// Are we at the end of a line, and don't have a period?
if (e.Key == Key.Enter && !word.EndsWith("."))
{
TextPointer pointer = textbox1.CaretPosition;
if (pointer.LogicalDirection == LogicalDirection.Backward) // change direction, if needed
{
pointer = pointer.GetPositionAtOffset(0, LogicalDirection.Forward);
textbox1.CaretPosition = pointer;
}
pointer.InsertTextInRun(".");
}
}
}
void RecognizeAt(string text, TextChangedEventArgs e)
{
if (string.IsNullOrEmpty(text))
{
this.CloseAtPopup();
return;
}
if (!_isRecognizeAt)
{
return;
}
if (_isAtSomeoneFromChatBox)
{
return;
}
if (text.Contains("@"))
{
TextPointer tpCaret = this.richBox.CaretPosition;
string tpBackwardText = tpCaret.GetTextInRun(LogicalDirection.Backward);
#region 过滤重复的@
//如果为英文输入状态时，输入一个@时，会因为用了“Popup遮挡输入法的解决方案”而多次触发TextChanged事件;
//导致输入一个@界面显示两个@，所以加一个bool字段去判断，删掉一个重复的@。
if (this.ppMember.IsUpdateWindow)
{
this.ppMember.IsUpdateWindow = false;
tpCaret.DeleteTextInRun(-1);
e.Handled = true;
return;
}
#endregion
int offset = tpCaret.GetOffsetToPosition(this.richBox.Document.ContentStart);
if (!this._isPaste && offset == -2)
{
this.CloseAtPopup();
return;
}
this.CalculatePopupLocation(tpCaret);
this.GetAtList();
if (!_isRecognizeAt)
{
return;
}
string key;
if (this._isPaste)
{
key = Clipboard.GetText().Split('@').Last();
this._isPaste = false;
}
else
{
key = tpBackwardText.Split('@').Last();
}
try
{
if (string.IsNullOrEmpty(key))
{
this.listMember.ItemsSource = this._groupMember.OrderBy(x => x.DisplayName, new OrdinalComparer()).OrderBy(x => KeySelecter(x));
this.OpenAtPopup(0);
}
else
{
if (this._groupMember.Any(x => x.DisplayName.ToLower().Contains(key.ToLower())))
{
this.listMember.ItemsSource = this._groupMember.Where(x => x.DisplayName.ToLower().Contains(key.ToLower())).OrderBy(x => x.DisplayName, new OrdinalComparer()).OrderBy(x => KeySelecter(x));
this.OpenAtPopup(key.Length);
}
else
{
this.CloseAtPopup();
}
}
}
catch
{
this.CloseAtPopup();
}
}
else
{
this.CloseAtPopup();
}
}