RichEditSelection Class

Contains a set of methods and properties to work with the document selection.

Declaration

export class RichEditSelection

Remarks

An instance of the RichEditSelection object can be accessed by the selection property.

Properties

active Property

Gets a cursor position.

Declaration

readonly active: number

Property Value

Type	Description
number	The active selection position (the cursor position).

Remarks

Users can make a selection from left to right or from right to left. Use the anchor property to get the position where a user starts the selection. To get the position where the user ends the selection, use the active property.

var subDocument = richEdit.selection.activeSubDocument;
var position = richEdit.selection.active;
subDocument.insertText(position, 'text');

See Also

Examples

Selection

activeSubDocument Property

Returns the active sub-document.

Declaration

readonly activeSubDocument: SubDocumentBase

Property Value

Type	Description
SubDocumentBase	The active sub-document.

Remarks

var subDocument = richEdit.selection.activeSubDocument;
var position = richEdit.selection.active;
subDocument.insertText(position, 'text');

See Also

Examples

Selection

anchor Property

Gets a position where a user starts the last selection.

Declaration

readonly anchor: number

Property Value

Type	Description
number	The position of the selection anchor.

Remarks

Users can make a selection from left to right or from right to left. Use the anchor property to get the position where a user starts the selection. To get the position where the user ends the selection, use the active property.

end Property

Gets the end position of the last selected interval.

Declaration

readonly end: number

Property Value

Type	Description
number	The end position.

intervals Property

Gets an array of document intervals in the selection.

Declaration

readonly intervals: Interval[]

Property Value

Type	Description
Interval[]	An array of Interval objects.

See Also

Selection

showCursorAtEndOfLine Property

Specifies where to display the cursor when its position is on the border of two lines: at the end of the previous line or at the beginning of the new line.

Declaration

showCursorAtEndOfLine: boolean

Property Value

Type	Description
boolean	true to display the cursor at the end of the previous line; false to display the cursor at the beginning of the new line.

start Property

Gets the start position of the last selected interval.

Declaration

readonly start: number

Property Value

Type	Description
number	The start position.

Methods

goToDocumentEnd Method

Moves the cursor to the end of the active sub-document and allows you to extend the selection.

Declaration

goToDocumentEnd(
    extendSelection?: boolean
): void

Parameters

Name	Type	Description
extendSelection	boolean	true to extend the selection; otherwise, false.

Remarks

// Inserts text at the end of the active sub-document
richEdit.selection.goToDocumentEnd(false);
var position = richEdit.selection.active;
richEdit.selection.activeSubDocument.insertText(position, 'text');

goToDocumentStart Method

Moves the cursor to the start of the active sub-document and allows you to extend the selection.

Declaration

goToDocumentStart(
    extendSelection?: boolean
): void

Parameters

Name	Type	Description
extendSelection	boolean	true to extend the selection; otherwise, false.

Remarks

// Inserts text at the start of the active sub-document
richEdit.selection.goToDocumentStart(false);
var position = richEdit.selection.active;
richEdit.selection.activeSubDocument.insertText(position, 'text');

goToLineEnd Method

Moves the cursor to the end of the line and allows you to extend the selection.

Declaration

goToLineEnd(
    extendSelection?: boolean
): void

Parameters

Name	Type	Description
extendSelection	boolean	true to extend the selection; otherwise, false.

Remarks

richEdit.selection.goToLineEnd(true);

goToLineStart Method

Moves the cursor to the start of the line and allows you to extend the selection.

Declaration

goToLineStart(
    extendSelection?: boolean
): void

Parameters

Name	Type	Description
extendSelection	boolean	true to extend the selection; otherwise, false.

Remarks

richEdit.selection.goToLineStart(true);

goToNextCharacter Method

Moves the cursor to the next character and allows you to extend the selection.

Declaration

goToNextCharacter(
    extendSelection?: boolean
): void

Parameters

Name	Type	Description
extendSelection	boolean	true to extend the selection; otherwise, false.

Remarks

richEdit.selection.goToNextCharacter(true);

goToNextLine Method

Moves the cursor to the next line and allows you to extend the selection.

Declaration

goToNextLine(
    extendSelection?: boolean
): void

Parameters

Name	Type	Description
extendSelection	boolean	true to extend the selection; otherwise, false.

Remarks

Moves the cursor one line down. If the current line is the last one, moves the cursor to the end of the current line.

Use the goToLineStart/goToLineEnd method to move the cursor to the start/end of the line.

// Moves the cursor to the start of the next line
richEdit.selection.goToNextLine(false);
richEdit.selection.goToLineStart(false);

goToNextPage Method

Moves the cursor to the next page and allows you to extend the selection.

Declaration

goToNextPage(
    extendSelection?: boolean
): void

Parameters

Name	Type	Description
extendSelection	boolean	true to extend the selection; otherwise, false.

Remarks

Moves the cursor one page down. If the current page is the last one, moves the cursor to the end of the current page.

richEdit.selection.goToNextPage(true);

goToNextPageStart Method

Moves the cursor to the start of the next page and allows you to extend the selection.

Declaration

goToNextPageStart(
    extendSelection?: boolean
): void

Parameters

Name	Type	Description
extendSelection	boolean	true to extend the selection; otherwise, false.

Remarks

richEdit.selection.goToNextPageStart(true);

goToNextWord Method

Moves the cursor to the next word and allows you to extend the selection.

Declaration

goToNextWord(
    extendSelection?: boolean
): void

Parameters

Name	Type	Description
extendSelection	boolean	true to extend the selection; otherwise, false.

Remarks

This method treats most punctuation marks as separate words.

richEdit.selection.goToNextWord(true);

goToParagraphEnd Method

Moves the cursor to the end of the paragraph and allows you to extend the selection.

Declaration

goToParagraphEnd(
    extendSelection?: boolean
): void

Parameters

Name	Type	Description
extendSelection	boolean	true to extend the selection; otherwise, false.

Remarks

Moves the cursor to the end of the current paragraph. If the cursor is at the end of a paragraph, moves the cursor to the end of the next paragraph.

richEdit.selection.goToParagraphEnd(true);

goToParagraphStart Method

Moves the cursor to the start of the paragraph and allows you to extend the selection.

Declaration

goToParagraphStart(
    extendSelection?: boolean
): void

Parameters

Name	Type	Description
extendSelection	boolean	true to extend the selection; otherwise, false.

Remarks

Moves the cursor to the start of the current paragraph. If the cursor is at the start of a paragraph, moves the cursor to the start of the previous paragraph.

richEdit.selection.goToParagraphStart(true);

goToPreviousCharacter Method

Moves the cursor to the previous character and allows you to extend the selection.

Declaration

goToPreviousCharacter(
    extendSelection?: boolean
): void

Parameters

Name	Type	Description
extendSelection	boolean	true to extend the selection; otherwise, false.

Remarks

richEdit.selection.goToPreviousCharacter(true);

goToPreviousLine Method

Moves the cursor to the previous line and allows you to extend the selection.

Declaration

goToPreviousLine(
    extendSelection?: boolean
): void

Parameters

Name	Type	Description
extendSelection	boolean	true to extend the selection; otherwise, false.

Remarks

Moves the cursor one line up. If the current line is the first one, moves the cursor to the start of the current line.

Use the goToLineStart/goToLineEnd method to move the cursor to the start/end of the line.

// Moves the cursor to the start of the previous line
richEdit.selection.goToPreviousLine(false);
richEdit.selection.goToLineStart(false);

goToPreviousPage Method

Moves the cursor to the previous page and allows you to extend the selection.

Declaration

goToPreviousPage(
    extendSelection?: boolean
): void

Parameters

Name	Type	Description
extendSelection	boolean	true to extend the selection; otherwise, false.

Remarks

Moves the cursor one page up. If the current page is the first one, moves the cursor to the start of the current page.

richEdit.selection.goToPreviousPage(true);

goToPreviousPageStart Method

Moves the cursor to the start of the previous page and allows you to extend the selection.

Declaration

goToPreviousPageStart(
    extendSelection?: boolean
): void

Parameters

Name	Type	Description
extendSelection	boolean	true to extend the selection; otherwise, false.

Remarks

richEdit.selection.goToPreviousPageStart(true);

goToPreviousWord Method

Moves the cursor to the previous word and allows you to extend the selection.

Declaration

goToPreviousWord(
    extendSelection?: boolean
): void

Parameters

Name	Type	Description
extendSelection	boolean	true to extend the selection; otherwise, false.

Remarks

This method treats most punctuation marks as separate words.

richEdit.selection.goToPreviousWord(true);

goToSubDocumentEnd Method

Moves the cursor to the end of the sub-document and allows you to extend the selection.

Declaration

goToSubDocumentEnd(
    extendSelection?: boolean
): void

Parameters

Name	Type	Description
extendSelection	boolean	true, to extend the selection; otherwise, false.

Remarks

richEdit.selection.goToSubDocumentEnd();

selectAll Method

Selects the current sub-document’s entire content.

Declaration

selectAll(): void

Remarks

richEdit.selection.selectAll();

See Also

Selection

selectLine Method

Selects the line in which the cursor is located and allows you to extend the selection.

Declaration

selectLine(
    extendSelection?: boolean
): void

Parameters

Name	Type	Description
extendSelection	boolean	true to extend the selection; otherwise, false.

Remarks

When the end of the current line is already selected, the method selects the next line.

// Selects five lines
for(let i=0; i<5; i++)
  richEdit.selection.selectLine(true);

selectParagraph Method

Selects the paragraph in which the cursor is located.

Declaration

selectParagraph(): void

Remarks

richEdit.selection.selectParagraph();

selectTable Method

Selects the entire table in which the cursor is located.

Declaration

selectTable(): void

Remarks

richEdit.selection.selectTable();

selectTableCell Method

Selects the table cell in which the cursor is located.

Declaration

selectTableCell(): void

Remarks

richEdit.selection.selectTableCell();

selectTableRow Method

Selects the table row in which the cursor is located.

Declaration

selectTableRow(): void

Remarks

richEdit.selection.selectTableRow();

setSelection(position) Method

Selects the specified interval(s).

Declaration

setSelection(
    position: number | IInterval | IInterval[]
): void

Parameters

Name	Type	Description
position	number \| IInterval \| IInterval[]	The interval(s) or position to select.

Remarks

var subDocument = richEdit.selection.activeSubDocument;
var position = richEdit.selection.active;
var templateText = '[Type your text here]';

richEdit.beginUpdate();
richEdit.history.beginTransaction();

position = subDocument.insertParagraph(position).interval.end;
position = subDocument.insertParagraph(position).interval.end;
position = subDocument.insertText(position, 'Dear Mr Stanley,').end;
position = subDocument.insertParagraph(position).interval.end;
var tmpTextInterval = subDocument.insertText(position, templateText);
position = tmpTextInterval.end;
position = subDocument.insertParagraph(position).interval.end;

richEdit.endUpdate();
richEdit.history.endTransaction();

richEdit.selection.setSelection(tmpTextInterval);
richEdit.focus();

See Also

Selection