class Crystallabs::Helpers::KillRing

• Crystallabs::Helpers::KillRing
• Reference
• Object

Overview

An emacs/readline-style kill ring: the shared text register that readline editing keys push deleted text into (Ctrl-W / Ctrl-U / Ctrl-K / Alt-D) and Ctrl-Y yanks back.

As in emacs, consecutive kills accumulate into one entry (so Ctrl-K Ctrl-K yanks both lines, and a backward kill prepends) until a non-kill action calls #interrupt. Older entries are retained up to #capacity for a future yank-pop.

Defined in:

crystallabs-helpers.cr

Constructors

• .default : KillRing

  Shared default ring (all inputs of a program, unless overridden).

• .new(capacity : Int32 = 60)

Class Method Summary

• .default=(default : KillRing)

  Shared default ring (all inputs of a program, unless overridden).

Instance Method Summary

• #capacity : Int32

  Maximum number of entries kept (older ones are dropped).

• #capacity=(capacity : Int32)

  Maximum number of entries kept (older ones are dropped).

• #clear : Nil

  Drops all entries (and resets the accumulation flag).

• #entries : Array(String)

  Kill entries, oldest first; the last is what #yank returns.

• #interrupt : Nil

  Marks that a non-kill action happened, so the next kill starts a new entry.

• #kill(text : String, *, prepend : Bool = false) : Nil

  Records text as a kill.

• #yank : String | Nil

  The most-recently killed text (what Ctrl-Y yanks), or nil when empty.

Constructor Detail

Class Method Detail

Instance Method Detail