struct TermBuf::Cell

• TermBuf::Cell
• Struct
• Value
• Object

Overview

One cell of the terminal grid.

Sixteen bytes, fixed size, with no reference to anything on the heap, so a Grid is one flat Slice(Cell) and a row is a Slice view into it.

A wide character occupies two cells: the first carries the character with #width two, and the second is a continuation with #width zero. Neither half is ever written without the other; Grid enforces that.

Defined in:

termbuf/core/cell.cr

Constructors

• .blank(style : StyleId = StyleTable::DEFAULT) : Cell

  An empty cell carrying style, which is what a cleared or scrolled-away part of the screen holds.

• .continuation(style : StyleId = StyleTable::DEFAULT) : Cell

  The second half of a wide character.

• .new(char : Char, style : StyleId = StyleTable::DEFAULT, width : UInt8 = 1_u8, cluster : UInt32 = ClusterPool::NONE)

Instance Method Summary

• #blank? : Bool

  Whether the cell holds a space and nothing else, ignoring its style.

• #char : Char

  The cell's character, or '\0' when this cell continues a wide one.

• #cluster : UInt32

  ClusterPool id for a multi code point grapheme cluster, or ClusterPool::NONE when #char says everything.

• #continuation? : Bool

  Whether this is the right half of a wide character.

• #style : StyleId

  Id into the buffer's StyleTable.

• #text(pool : ClusterPool) : String

  The text this cell paints, resolving a cluster id through pool.

• #to_s(io : IO) : Nil

  Same as #inspect(io).

• #wide? : Bool

  Whether this is the left half of a wide character.

• #width : UInt8

  Cells this character occupies: zero for a continuation, one for a narrow character, two for a wide one.

Constructor Detail

Instance Method Detail