<C-W> deletes all texts up to the beginning, not a word, in REPL

General Usage
1

I think that <C-W> in JuliaREPL should remove text a word at once, not all texts up to the beginning.

Is there any way to configure it as I want?

Note: I’m using OhMyREPL.

Julia Version 1.5.3
Commit 788b2c77c1 (2020-11-09 13:37 UTC)
Platform Info:
  OS: macOS (x86_64-apple-darwin18.7.0)
  CPU: Apple M1
  WORD_SIZE: 64
  LIBM: libopenlibm
  LLVM: libLLVM-9.0.1 (ORCJIT, westmere)
2

I am not using OhMyRepl, and find that it does remove words one at a time.

3

Oh, really?

For instance, suppose that there are texts like include(test/runtests (not closed parenthesis).
In the above case, how does it change when pressing ?

For me, it deletes all.

EDIT: disable OhMyREPL and try it again also shows the same result to me :frowning:

4

Try adding whitespace.

5

Sorry but I’m not talking about space-separated words. Please see the example.

In most terminal environments such as in macOS and Ubuntu (with zsh in my case), <C-W> removes a word at once like this: qwer/asdf → qwer/.
So I hope that <C-W> in JuliaREPL changes include("test/runtests to include("test/.

6

I think you are looking for Meta (Alt) + Backspace.

julia> include("test/runtests.jl")
# Alt- Backspace
julia> include("test/runtests.
# Alt- Backspace
julia> include("test/
# Alt- Backspace
julia> include("
# Alt- Backspace
julia>
7

Try this:

julia> mode = Base.active_repl.interface.modes[1]
"Prompt(\"julia> \",...)"

julia> mode.keymap_dict['\x17'] = mode.keymap_dict['\e']['\b']
#112 (generic function with 1 method)
1 Like
8

It works! But I’m little bit worried about that this change might have some potential issues.
If you don’t mind, can you explain it in details?

9

We are simply modifying the keymaps originally stated in julia/LineEdit.jl at master · JuliaLang/julia · GitHub . In this case, we just borrowed the the function for Alt-Backspace ("\e\b") to be used for Ctrl-W ("^W", aka '\x17').

1 Like
10

Thank you very much.

Is it also possible to add it to startup.jl?
Cuz I’ve tried it but this error occurs:

ERROR: LoadError: UndefVarError: active_repl not defined
Stacktrace:
 [1] getproperty(::Module, ::Symbol) at ./Base.jl:26
 [2] top-level scope at /Applications/Julia-1.5.app/Contents/Resources/julia/etc/julia/startup.jl:22
 [3] include(::Function, ::Module, ::String) at ./Base.jl:380
 [4] include at ./Base.jl:368 [inlined]
 [5] load_julia_startup() at ./client.jl:324
 [6] exec_options(::Base.JLOptions) at ./client.jl:267
 [7] _start() at ./client.jl:506
in expression starting at /Applications/Julia-1.5.app/Contents/Resources/julia/etc/julia/startup.jl:22

.../startup.jl:

...
Base.active_repl.interface.modes[1].keymap_dict['\x17'] = Base.active_repl.interface.modes[1].keymap_dict['\e']['\b']
11

You probably need to add it to atreplinit in startup.jl:
https://docs.julialang.org/en/v1/stdlib/REPL/#Base.atreplinit

atreplinit() do repl
   repl.interface.modes[1].keymap_dict['\x17'] = repl.interface.modes[1].keymap_dict['\e']['\b']
end

I have not tested this.

12

Sorry but it does not work.

I gave up :frowning:

13

Try this in startup.jl

import REPL.LineEdit: MIState, edit_delete_prev_word
  
atreplinit() do repl
    push!(repl.options.extra_keymap,
          Dict('\x17' => (s::MIState,o...)->edit_delete_prev_word(s)))
end
1 Like
14

Thanks a lot.

I found that keymapping “after” OhMyREPL does not properly work.
So I moved lines about keymapping at the beginning of startup.jl as follows, and it works.

import REPL
import REPL.LineEdit: MIState, edit_delete_prev_word, ModeState
atreplinit() do repl
    repl.interface = REPL.setup_interface(repl; extra_repl_keymap = Dict("^W" => "\e\b"))
end

Reference: Customizing-keybindings

1 Like