Struct CellRange

Represents a text selection range in a cell grid defined by an anchor (mouse-down) and active (current mouse) position. Provides normalized Start/End accessors that always return positions in document order regardless of selection direction.

Implements
Inherited Members
Namespace: Scylla.TextMode
Assembly: ScyllaTextMode.dll
Syntax
public readonly struct CellRange : IEquatable<CellRange>

Constructors

CellRange(CellPosition, CellPosition)

Creates a new cell range from anchor and active positions.

Declaration
public CellRange(CellPosition anchor, CellPosition active)
Parameters
Type Name Description
CellPosition anchor

The anchor (start) position.
CellPosition active

The active (end) position.

Fields

Active

The active position where the selection currently ends (current mouse point).

Declaration
public readonly CellPosition Active
Field Value
Type Description
CellPosition

Anchor

The anchor position where the selection started (mouse-down point).

Declaration
public readonly CellPosition Anchor
Field Value
Type Description
CellPosition

Properties

End

Gets the later position in document order (bottom-right of selection).

Declaration
public CellPosition End { get; }
Property Value
Type Description
CellPosition

IsEmpty

Gets whether the selection is empty (anchor equals active).

Declaration
public bool IsEmpty { get; }
Property Value
Type Description
bool

IsReversed

Gets whether the selection direction is reversed (active comes before anchor in document order).

Declaration
public bool IsReversed { get; }
Property Value
Type Description
bool

Start

Gets the earlier position in document order (top-left of selection).

Declaration
public CellPosition Start { get; }
Property Value
Type Description
CellPosition

Methods

CellCount(int)

Gets the total number of cells in this selection.

Declaration
public int CellCount(int columns)
Parameters
Type Name Description
int columns

Number of columns in the grid. Must be greater than zero.
Returns
Type Description
int

Number of selected cells, or 0 if empty or columns is not positive.

Contains(CellPosition, int)

Tests whether a cell position falls within this selection range using flat index comparison.

Declaration
public bool Contains(CellPosition position, int columns)
Parameters
Type Name Description
CellPosition position

The position to test.
int columns

Number of columns in the grid. Must be greater than zero.
Returns
Type Description
bool

True if the position is within the selection range. False if columns is not positive.

Equals(CellRange)

Determines whether this range equals another range. Comparison is direction-sensitive: ranges covering the same cells but with different anchor/active positions are not equal. Use Start/End for direction-independent comparison.

Declaration
public bool Equals(CellRange other)
Parameters
Type Name Description
CellRange other

The other range.
Returns
Type Description
bool

True if anchor and active positions are identical.

Equals(object)

Declaration
public override bool Equals(object obj)
Parameters
Type Name Description
object obj
Returns
Type Description
bool
Overrides

GetHashCode()

Declaration
public override int GetHashCode()
Returns
Type Description
int
Overrides

ToString()

Declaration
public override string ToString()
Returns
Type Description
string
Overrides

Operators

operator ==(CellRange, CellRange)

Equality operator.

Declaration
public static bool operator ==(CellRange left, CellRange right)
Parameters
Type Name Description
CellRange left
CellRange right
Returns
Type Description
bool

operator !=(CellRange, CellRange)

Inequality operator.

Declaration
public static bool operator !=(CellRange left, CellRange right)
Parameters
Type Name Description
CellRange left
CellRange right
Returns
Type Description
bool

Implements