Class TextPosition

Represents the TextPosition class.

Inheritance

System.Object

TextPosition

Namespace: Syncfusion.Windows.Controls.RichTextBoxAdv

Assembly: Syncfusion.SfRichTextBoxAdv.WPF.dll

Syntax

public class TextPosition : Object

Constructors

TextPosition()

Initializes a new instance of the TextPosition class.

Declaration

public TextPosition()

Properties

GetHierarchicalIndex

Gets the hierarchical index of the TextPosition.

Declaration

public string GetHierarchicalIndex { get; }

Property Value

Type	Description
System.String	The hierarchical index of the TextPosition.

HierarchicalIndex

Gets the hierarchical index of the TextPosition.

Declaration

public string HierarchicalIndex { get; }

Property Value

Type	Description
System.String	The hierarchical index of the TextPosition.

Examples

The following code example demonstrates how to gets the hierarchical index of the TextPosition.

// Stores the logical position of selection start as static string.
string startHierarchicalIndex = richTextBoxAdv.Selection.Start.HierarchicalIndex;
// Gets the logical text position at specified index.
TextPosition position = richTextBoxAdv.Document.GetTextPosition(startHierarchicalIndex);

' Stores the logical position of selection start as static string.
Private startHierarchicalIndex As String = richTextBoxAdv.Selection.Start.HierarchicalIndex

' Gets the logical text position at specified index.
Private position As TextPosition = richTextBoxAdv.Document.GetTextPosition(startHierarchicalIndex)

Paragraph

Gets the ParagraphAdv at which the TextPosition lies.

Declaration

public ParagraphAdv Paragraph { get; }

Property Value

Type	Description
ParagraphAdv	The ParagraphAdv at which the TextPosition lies.

Methods

GetRect()

Returns a bounding box System.Windows.Rect of the current TextPosition instance relative to SfRichTextBoxAdv control.

Declaration

public Rect GetRect()

Returns

Type	Description
System.Windows.Rect	The bounding box System.Windows.Rect.

Examples

// Initializes a new instance of RichTextBoxAdv.
SfRichTextBoxAdv richTextBoxAdv = new SfRichTextBoxAdv();
// Gets the caret bounding box of Selection end.
Rect boundingRect = richTextBoxAdv.Selection.End.GetRect();

' Initializes a new instance of RichTextBoxAdv.
Dim richTextBoxAdv As New SfRichTextBoxAdv()
' Gets the caret bounding box of Selection end.
Dim boundingRect As Rect = richTextBoxAdv.Selection.End.GetRect()

IsAtSamePosition(TextPosition)

Identifies whether the specified TextPosition denotes the same position as this TextPosition.

Declaration

public bool IsAtSamePosition(TextPosition textPosition)

Parameters

Type	Name	Description
TextPosition	textPosition	A TextPosition instance that denotes a position to compare to this TextPosition instance.

Returns

Type	Description
System.Boolean	True, if this TextPosition instance and the specified TextPosition both denotes the same position. Otherwise False.

Examples

The following code example demonstrates how to identify whether two text positions denotes the same position.

<RichTextBoxAdv:SfRichTextBoxAdv x:Name="richTextBoxAdv"/>

public bool IsAtSamePosition()
{
    TextPosition position1 = richTextBoxAdv.Document.GetTextPosition("0;0;0");
ParagraphAdv paragraph = richTextBoxAdv.Document.Sections[0].Blocks[0] as ParagraphAdv;
TextPosition position2 = richTextBoxAdv.Document.GetTextPosition(paragraph, 0);

if (position1.IsAtSamePosition(position2))
    return true;

return false;

}

Public Function IsAtSamePosition() As Boolean
    Dim position1 As TextPosition = richTextBoxAdv.Document.GetTextPosition("0;0;0")

    Dim paragraph As ParagraphAdv = TryCast(richTextBoxAdv.Document.Sections(0).Blocks(0), ParagraphAdv)
    Dim position2 As TextPosition = richTextBoxAdv.Document.GetTextPosition(paragraph, 0)

    If position1.IsAtSamePosition(position2) Then
        Return True
    End If

    Return False
End Function

Exceptions

Type	Condition
System.ArgumentNullException	The textPosition cannot be null.

IsInSameDocument(TextPosition)

Identifies whether the specified see cref="TextPosition"/> lies in the same document as this TextPosition.

Declaration

public bool IsInSameDocument(TextPosition textPosition)

Parameters

Type	Name	Description
TextPosition	textPosition	A TextPosition instance that denotes a position to compare to this TextPosition instance.

Returns

Type	Description
System.Boolean	True, if this TextPosition instance and the specified TextPosition both lies in the same document. Otherwise False.

Examples

The following code example demonstrates how to identify whether two text positions lies in the same document.

<RichTextBoxAdv:SfRichTextBoxAdv x:Name="richTextBoxAdv"/>

public bool IsInSameDocument()
{
    TextPosition position1 = richTextBoxAdv.Document.GetTextPosition("0;4;2");
ParagraphAdv paragraph = richTextBoxAdv.Document.Sections[0].Blocks[0] as ParagraphAdv;
TextPosition position2 = richTextBoxAdv.Document.GetTextPosition(paragraph, 0);

if (position1.IsInSameDocument(position2))
    return true;

return false;

}

Public Function IsInSameDocument() As Boolean
    Dim position1 As TextPosition = richTextBoxAdv.Document.GetTextPosition("0;4;2")

    Dim paragraph As ParagraphAdv = TryCast(richTextBoxAdv.Document.Sections(0).Blocks(0), ParagraphAdv)
    Dim position2 As TextPosition = richTextBoxAdv.Document.GetTextPosition(paragraph, 0)

    If position1.IsInSameDocument(position2) Then
        Return True
    End If

    Return False
End Function

Exceptions

Type	Condition
System.ArgumentNullException	The textPosition cannot be null.

MoveToLineEnd()

Moves the TextPosition to the end of the line.

Declaration

public void MoveToLineEnd()

Examples

The following code example demonstrates how to select a line by moving the text position to the end of the line.

<RichTextBoxAdv:SfRichTextBoxAdv x:Name="richTextBoxAdv"/>

public void SelectLine()
{
    // Retrieves the text position at the specified hierarchical position.
    TextPosition startTextPosition = richTextBoxAdv.Document.GetTextPosition("0;3;16");
    if (startTextPosition == null)
        return;
    // Moves the text position to the beginning of the line.
    startTextPosition.MoveToLineStart();
    // Initialize a new text position and moves it to the end of the line.
    TextPosition endTextPosition = richTextBoxAdv.Document.GetTextPosition(startTextPosition.GetHierarchicalIndex);
    endTextPosition.MoveToLineEnd();
    // Selects the line.
    richTextBoxAdv.Selection.Select(startTextPosition, endTextPosition);
}

Public Sub SelectLine()
    ' Retrieves the text position at the specified hierarchical position.
    Dim startTextPosition As TextPosition = richTextBoxAdv.Document.GetTextPosition("0;3;16")
    If startTextPosition Is Nothing Then
        Return
    End If
    ' Moves the text position to the beginning of the line.
    startTextPosition.MoveToLineStart()
    ' Initialize a new text position and moves it to the end of the line.
    Dim endTextPosition As TextPosition = richTextBoxAdv.Document.GetTextPosition(startTextPosition.GetHierarchicalIndex)
    endTextPosition.MoveToLineEnd()
    ' Selects the line.
    richTextBoxAdv.Selection.[Select](startTextPosition, endTextPosition)
End Sub

MoveToLineStart()

Moves the TextPosition to the beginning of the line.

Declaration

public void MoveToLineStart()

Examples

The following code example demonstrates how to select a line by moving the text position to the beginning of the line.

<RichTextBoxAdv:SfRichTextBoxAdv x:Name="richTextBoxAdv"/>

public void SelectLine()
{
    // Retrieves the text position at the specified hierarchical position.
    TextPosition startTextPosition = richTextBoxAdv.Document.GetTextPosition("0;3;16");
    if (startTextPosition == null)
        return;
    // Moves the text position to the beginning of the line.
    startTextPosition.MoveToLineStart();
    // Initialize a new text position and moves it to the end of the line.
    TextPosition endTextPosition = richTextBoxAdv.Document.GetTextPosition(startTextPosition.GetHierarchicalIndex);
    endTextPosition.MoveToLineEnd();
    // Selects the line.
    richTextBoxAdv.Selection.Select(startTextPosition, endTextPosition);
}

Public Sub SelectLine()
    ' Retrieves the text position at the specified hierarchical position.
    Dim startTextPosition As TextPosition = richTextBoxAdv.Document.GetTextPosition("0;3;16")
    If startTextPosition Is Nothing Then
        Return
    End If
    ' Moves the text position to the beginning of the line.
    startTextPosition.MoveToLineStart()
    ' Initialize a new text position and moves it to the end of the line.
    Dim endTextPosition As TextPosition = richTextBoxAdv.Document.GetTextPosition(startTextPosition.GetHierarchicalIndex)
    endTextPosition.MoveToLineEnd()
    ' Selects the line.
    richTextBoxAdv.Selection.[Select](startTextPosition, endTextPosition)
End Sub

MoveToNextParagraphStart()

Moves the TextPosition to the beginning of the next paragraph.

Declaration

public void MoveToNextParagraphStart()

Examples

The following code example demonstrates how to select next paragraph by moving the text position to the beginning of the next paragraph.

<RichTextBoxAdv:SfRichTextBoxAdv x:Name="richTextBoxAdv"/>

public void SelectNextParagraph()
{
    // Retrieves the text position at the specified hierarchical position.
    TextPosition startTextPosition = richTextBoxAdv.Document.GetTextPosition("0;4;21");
    if (startTextPosition == null)
        return;
    // Moves the text position to the beginning of the next paragraph.
    startTextPosition.MoveToNextParagraphStart();
    // Initialize a new text position and moves it to the end of the next paragraph.
    TextPosition endTextPosition = richTextBoxAdv.Document.GetTextPosition(startTextPosition.GetHierarchicalIndex);
    endTextPosition.MoveToParagraphEnd();
    // Selects the next paragraph.
    richTextBoxAdv.Selection.Select(startTextPosition, endTextPosition);
}

Public Sub SelectNextParagraph()
    ' Retrieves the text position at the specified hierarchical position.
    Dim startTextPosition As TextPosition = richTextBoxAdv.Document.GetTextPosition("0;4;21")
    If startTextPosition Is Nothing Then
        Return
    End If
    ' Moves the text position to the beginning of the next paragraph.
    startTextPosition.MoveToNextParagraphStart()
    ' Initialize a new text position and moves it to the end of the next paragraph.
    Dim endTextPosition As TextPosition = richTextBoxAdv.Document.GetTextPosition(startTextPosition.GetHierarchicalIndex)
    endTextPosition.MoveToParagraphEnd()
    ' Selects the next paragraph.
    richTextBoxAdv.Selection.[Select](startTextPosition, endTextPosition)
End Sub

MoveToParagraphEnd()

Moves the TextPosition to the end of the paragraph.

Declaration

public void MoveToParagraphEnd()

Examples

The following code example demonstrates how to select a paragraph move the text position to the end of the paragraph.

<RichTextBoxAdv:SfRichTextBoxAdv x:Name="richTextBoxAdv"/>

public void SelectParagraph()
{
    // Retrieves the text position at the specified hierarchical position.
    TextPosition startTextPosition = richTextBoxAdv.Document.GetTextPosition("0;2;16");
    if (startTextPosition == null)
        return;
    // Moves the text position to the beginning of the paragraph.
    startTextPosition.MoveToParagraphStart();
    // Initialize a new text position and moves it to the end of the paragraph.
    TextPosition endTextPosition = richTextBoxAdv.Document.GetTextPosition(startTextPosition.GetHierarchicalIndex);
    endTextPosition.MoveToParagraphEnd();
    // Selects the paragraph.
    richTextBoxAdv.Selection.Select(startTextPosition, endTextPosition);
}

Public Sub SelectParagraph()
    ' Retrieves the text position at the specified hierarchical position.
    Dim startTextPosition As TextPosition = richTextBoxAdv.Document.GetTextPosition("0;2;16")
    If startTextPosition Is Nothing Then
        Return
    End If
    ' Moves the text position to the beginning of the paragraph.
    startTextPosition.MoveToParagraphStart()
    ' Initialize a new text position and moves it to the end of the paragraph.
    Dim endTextPosition As TextPosition = richTextBoxAdv.Document.GetTextPosition(startTextPosition.GetHierarchicalIndex)
    endTextPosition.MoveToParagraphEnd()
    ' Selects the paragraph.
    richTextBoxAdv.Selection.[Select](startTextPosition, endTextPosition)
End Sub

MoveToParagraphStart()

Moves the TextPosition to the beginning of the paragraph.

Declaration

public void MoveToParagraphStart()

Examples

The following code example demonstrates how to select a paragraph by moving the text position to the beginning of the paragraph.

<RichTextBoxAdv:SfRichTextBoxAdv x:Name="richTextBoxAdv"/>

public void SelectParagraph()
{
    // Retrieves the text position at the specified hierarchical position.
    TextPosition startTextPosition = richTextBoxAdv.Document.GetTextPosition("0;2;16");
    if (startTextPosition == null)
        return;
    // Moves the text position to the beginning of the paragraph.
    startTextPosition.MoveToParagraphStart();
    // Initialize a new text position and moves it to the end of the paragraph.
    TextPosition endTextPosition = richTextBoxAdv.Document.GetTextPosition(startTextPosition.GetHierarchicalIndex);
    endTextPosition.MoveToParagraphEnd();
    // Selects the paragraph.
    richTextBoxAdv.Selection.Select(startTextPosition, endTextPosition);
}

Public Sub SelectParagraph()
    ' Retrieves the text position at the specified hierarchical position.
    Dim startTextPosition As TextPosition = richTextBoxAdv.Document.GetTextPosition("0;2;16")
    If startTextPosition Is Nothing Then
        Return
    End If
    ' Moves the text position to the beginning of the paragraph.
    startTextPosition.MoveToParagraphStart()
    ' Initialize a new text position and moves it to the end of the paragraph.
    Dim endTextPosition As TextPosition = richTextBoxAdv.Document.GetTextPosition(startTextPosition.GetHierarchicalIndex)
    endTextPosition.MoveToParagraphEnd()
    ' Selects the paragraph.
    richTextBoxAdv.Selection.[Select](startTextPosition, endTextPosition)
End Sub

MoveToPreviousParagraphEnd()

Moves the TextPosition to the end of the previous paragraph.

Declaration

public void MoveToPreviousParagraphEnd()

Examples

The following code example demonstrates how to select previous paragraph by moving the text position to the end of the previous paragraph.

<RichTextBoxAdv:SfRichTextBoxAdv x:Name="richTextBoxAdv"/>

public void SelectPreviousParagraph()
{
    // Retrieves the text position at the specified hierarchical position.
    TextPosition endTextPosition = richTextBoxAdv.Document.GetTextPosition("0;2;40");
    if (endTextPosition == null)
        return;
    // Moves the text position to the end of the previous paragraph.
    endTextPosition.MoveToPreviousParagraphEnd();
    // Initialize a new text position and moves it to the beginning of the previous paragraph.
    TextPosition startTextPosition = richTextBoxAdv.Document.GetTextPosition(endTextPosition.GetHierarchicalIndex);
    startTextPosition.MoveToParagraphStart();
    // Selects the previous paragraph.
    richTextBoxAdv.Selection.Select(startTextPosition, endTextPosition);
}

Public Sub SelectPreviousParagraph()
    ' Retrieves the text position at the specified hierarchical position.
    Dim endTextPosition As TextPosition = richTextBoxAdv.Document.GetTextPosition("0;2;40")
    If endTextPosition Is Nothing Then
        Return
    End If
    ' Moves the text position to the end of the previous paragraph.
    endTextPosition.MoveToPreviousParagraphEnd()
    ' Initialize a new text position and moves it to the start of the previous paragraph.
    Dim startTextPosition As TextPosition = richTextBoxAdv.Document.GetTextPosition(endTextPosition.GetHierarchicalIndex)
    startTextPosition.MoveToParagraphStart()
    ' Selects the previous paragraph.
    richTextBoxAdv.Selection.[Select](startTextPosition, endTextPosition)
End Sub

MoveToWordEnd()

Moves the TextPosition to the end of word.

Declaration

public void MoveToWordEnd()

Examples

The following code example demonstrates how to select a word by moving the text position to the end of word.

<RichTextBoxAdv:SfRichTextBoxAdv x:Name="richTextBoxAdv"/>

public void SelectWord()
{
    // Retrieves the text position at the specified hierarchical position.
    TextPosition startTextPosition = richTextBoxAdv.Document.GetTextPosition("0;0;24");
    if (startTextPosition == null)
        return;
    // Moves the text position to the beginning of the word.
    startTextPosition.MoveToWordStart();
    // Initialize a new text position and moves it to the end of the word.
    TextPosition endTextPosition = richTextBoxAdv.Document.GetTextPosition(startTextPosition.GetHierarchicalIndex);
    endTextPosition.MoveToWordEnd();
    // Selects the word.
    richTextBoxAdv.Selection.Select(startTextPosition, endTextPosition);
}

Public Sub SelectWord()
    ' Retrieves the text position at the specified hierarchical position.
    Dim startTextPosition As TextPosition = richTextBoxAdv.Document.GetTextPosition("0;0;24")
    If startTextPosition Is Nothing Then
        Return
    End If
    ' Moves the text position to the beginning of the word.
    startTextPosition.MoveToWordStart()
    ' Initialize a new text position and moves it to the end of the word.
    Dim endTextPosition As TextPosition = richTextBoxAdv.Document.GetTextPosition(startTextPosition.GetHierarchicalIndex)
    endTextPosition.MoveToWordEnd()
    ' Selects the word.
    richTextBoxAdv.Selection.[Select](startTextPosition, endTextPosition)
End Sub

MoveToWordStart()

Moves the TextPosition to the beginning of word.

Declaration

public void MoveToWordStart()

Examples

The following code example demonstrates how to select a word by moving the text position to the beginning of word.

<RichTextBoxAdv:SfRichTextBoxAdv x:Name="richTextBoxAdv"/>

public void SelectWord()
{
    // Retrieves the text position at the specified hierarchical position.
    TextPosition startTextPosition = richTextBoxAdv.Document.GetTextPosition("0;0;24");
    if (startTextPosition == null)
        return;
    // Moves the text position to the beginning of the word.
    startTextPosition.MoveToWordStart();
    // Initialize a new text position and moves it to the end of the word.
    TextPosition endTextPosition = richTextBoxAdv.Document.GetTextPosition(startTextPosition.GetHierarchicalIndex);
    endTextPosition.MoveToWordEnd();
    // Selects the word.
    richTextBoxAdv.Selection.Select(startTextPosition, endTextPosition);
}

Public Sub SelectWord()
    ' Retrieves the text position at the specified hierarchical position.
    Dim startTextPosition As TextPosition = richTextBoxAdv.Document.GetTextPosition("0;0;24")
    If startTextPosition Is Nothing Then
        Return
    End If
    ' Moves the text position to the beginning of the word.
    startTextPosition.MoveToWordStart()
    ' Initialize a new text position and moves it to the end of the word.
    Dim endTextPosition As TextPosition = richTextBoxAdv.Document.GetTextPosition(startTextPosition.GetHierarchicalIndex)
    endTextPosition.MoveToWordEnd()
    ' Selects the word.
    richTextBoxAdv.Selection.[Select](startTextPosition, endTextPosition)
End Sub