https://github.com/JuliaLang/julia
Tip revision: 26d7bb86c41a2343ad65e4da3e2bea2c7bc72e1c authored by Jameson Nash on 27 February 2016, 05:20:43 UTC
merge calls to identical methods (differing only by type signature) after doing union splitting
merge calls to identical methods (differing only by type signature) after doing union splitting
Tip revision: 26d7bb8
REPL.jl
# This file is a part of Julia. License is MIT: http://julialang.org/license
module REPL
using Base.Meta
using ..Terminals
using ..LineEdit
using ..REPLCompletions
export
BasicREPL,
LineEditREPL,
StreamREPL
import Base:
Display,
display,
writemime,
AnyDict,
==
import ..LineEdit:
CompletionProvider,
HistoryProvider,
add_history,
complete_line,
history_next,
history_next_prefix,
history_prev,
history_prev_prefix,
history_search,
accept_result,
terminal
abstract AbstractREPL
answer_color(::AbstractREPL) = ""
type REPLBackend
repl_channel::Channel
response_channel::Channel
in_eval::Bool
ans
backend_task::Task
REPLBackend(repl_channel, response_channel, in_eval, ans) =
new(repl_channel, response_channel, in_eval, ans)
end
function eval_user_input(ast::ANY, backend::REPLBackend)
iserr, lasterr, bt = false, (), nothing
while true
try
if iserr
put!(backend.response_channel, (lasterr, bt))
iserr, lasterr = false, ()
else
ans = backend.ans
# note: value wrapped in a non-syntax value to avoid evaluating
# possibly-invalid syntax (issue #6763).
eval(Main, :(ans = $(getindex)($(Any[ans]), 1)))
backend.in_eval = true
value = eval(Main, ast)
backend.in_eval = false
backend.ans = value
put!(backend.response_channel, (value, nothing))
end
break
catch err
if iserr
println("SYSTEM ERROR: Failed to report error to REPL frontend")
println(err)
end
iserr, lasterr = true, err
bt = catch_backtrace()
end
end
end
function start_repl_backend(repl_channel::Channel, response_channel::Channel)
backend = REPLBackend(repl_channel, response_channel, false, nothing)
backend.backend_task = @schedule begin
# include looks at this to determine the relative include path
# nothing means cwd
while true
tls = task_local_storage()
tls[:SOURCE_PATH] = nothing
ast, show_value = take!(backend.repl_channel)
if show_value == -1
# exit flag
break
end
eval_user_input(ast, backend)
end
end
backend
end
function display_error(io::IO, er, bt)
Base.with_output_color(:red, io) do io
print(io, "ERROR: ")
Base.showerror(io, er, bt)
end
end
immutable REPLDisplay{R<:AbstractREPL} <: Display
repl::R
end
==(a::REPLDisplay, b::REPLDisplay) = a.repl === b.repl
function display(d::REPLDisplay, ::MIME"text/plain", x)
io = outstream(d.repl)
Base.have_color && write(io, answer_color(d.repl))
writemime(io, MIME("text/plain"), x)
println(io)
end
display(d::REPLDisplay, x) = display(d, MIME("text/plain"), x)
function print_response(repl::AbstractREPL, val::ANY, bt, show_value::Bool, have_color::Bool)
repl.waserror = bt !== nothing
print_response(outstream(repl), val, bt, show_value, have_color, specialdisplay(repl))
end
function print_response(errio::IO, val::ANY, bt, show_value::Bool, have_color::Bool, specialdisplay=nothing)
while true
try
if bt !== nothing
display_error(errio, val, bt)
println(errio)
iserr, lasterr = false, ()
else
if val !== nothing && show_value
try
if specialdisplay === nothing
display(val)
else
display(specialdisplay,val)
end
catch err
println(errio, "Error showing value of type ", typeof(val), ":")
rethrow(err)
end
end
end
break
catch err
if bt !== nothing
println(errio, "SYSTEM: show(lasterr) caused an error")
break
end
val = err
bt = catch_backtrace()
end
end
end
# A reference to a backend
immutable REPLBackendRef
repl_channel::Channel
response_channel::Channel
end
function run_repl(repl::AbstractREPL, consumer = x->nothing)
repl_channel = Channel(1)
response_channel = Channel(1)
backend = start_repl_backend(repl_channel, response_channel)
consumer(backend)
run_frontend(repl, REPLBackendRef(repl_channel,response_channel))
backend
end
## BasicREPL ##
type BasicREPL <: AbstractREPL
terminal::TextTerminal
waserror::Bool
BasicREPL(t) = new(t,false)
end
outstream(r::BasicREPL) = r.terminal
function run_frontend(repl::BasicREPL, backend::REPLBackendRef)
d = REPLDisplay(repl)
dopushdisplay = !in(d,Base.Multimedia.displays)
dopushdisplay && pushdisplay(d)
repl_channel, response_channel = backend.repl_channel, backend.response_channel
hit_eof = false
while true
Base.reseteof(repl.terminal)
write(repl.terminal, "julia> ")
line = ""
ast = nothing
interrupted = false
while true
try
line *= readline(repl.terminal)
catch e
if isa(e,InterruptException)
try # raise the debugger if present
ccall(:jl_raise_debugger, Int, ())
end
line = ""
interrupted = true
break
elseif isa(e,EOFError)
hit_eof = true
break
else
rethrow()
end
end
ast = Base.parse_input_line(line)
(isa(ast,Expr) && ast.head == :incomplete) || break
end
if !isempty(line)
put!(repl_channel, (ast, 1))
val, bt = take!(response_channel)
if !ends_with_semicolon(line)
print_response(repl, val, bt, true, false)
end
end
write(repl.terminal, '\n')
((!interrupted && isempty(line)) || hit_eof) && break
end
# terminate backend
put!(repl_channel, (nothing, -1))
dopushdisplay && popdisplay(d)
end
## LineEditREPL ##
type LineEditREPL <: AbstractREPL
t::TextTerminal
hascolor::Bool
prompt_color::AbstractString
input_color::AbstractString
answer_color::AbstractString
shell_color::AbstractString
help_color::AbstractString
history_file::Bool
in_shell::Bool
in_help::Bool
envcolors::Bool
waserror::Bool
specialdisplay
interface
backendref::REPLBackendRef
LineEditREPL(t,hascolor,prompt_color,input_color,answer_color,shell_color,help_color,history_file,in_shell,in_help,envcolors) =
new(t,true,prompt_color,input_color,answer_color,shell_color,help_color,history_file,in_shell,
in_help,envcolors,false,nothing)
end
outstream(r::LineEditREPL) = r.t
specialdisplay(r::LineEditREPL) = r.specialdisplay
specialdisplay(r::AbstractREPL) = nothing
terminal(r::LineEditREPL) = r.t
LineEditREPL(t::TextTerminal, envcolors = false) = LineEditREPL(t,
true,
julia_green,
Base.input_color(),
Base.answer_color(),
Base.text_colors[:red],
Base.text_colors[:yellow],
false, false, false, envcolors)
type REPLCompletionProvider <: CompletionProvider
r::LineEditREPL
end
type ShellCompletionProvider <: CompletionProvider
r::LineEditREPL
end
immutable LatexCompletions <: CompletionProvider; end
bytestring_beforecursor(buf::IOBuffer) = bytestring(buf.data[1:buf.ptr-1])
function complete_line(c::REPLCompletionProvider, s)
partial = bytestring_beforecursor(s.input_buffer)
full = LineEdit.input_string(s)
ret, range, should_complete = completions(full, endof(partial))
return ret, partial[range], should_complete
end
function complete_line(c::ShellCompletionProvider, s)
# First parse everything up to the current position
partial = bytestring_beforecursor(s.input_buffer)
full = LineEdit.input_string(s)
ret, range, should_complete = shell_completions(full, endof(partial))
return ret, partial[range], should_complete
end
function complete_line(c::LatexCompletions, s)
partial = bytestring_beforecursor(LineEdit.buffer(s))
full = LineEdit.input_string(s)
ret, range, should_complete = bslash_completions(full, endof(partial))[2]
return ret, partial[range], should_complete
end
type REPLHistoryProvider <: HistoryProvider
history::Array{AbstractString,1}
history_file
cur_idx::Int
last_idx::Int
last_buffer::IOBuffer
last_mode
mode_mapping
modes::Array{Symbol,1}
end
REPLHistoryProvider(mode_mapping) =
REPLHistoryProvider(AbstractString[], nothing, 0, -1, IOBuffer(),
nothing, mode_mapping, UInt8[])
const invalid_history_message = """
Invalid history file (~/.julia_history) format:
If you have a history file left over from an older version of Julia,
try renaming or deleting it.
Invalid character: """
const munged_history_message = """
Invalid history file (~/.julia_history) format:
An editor may have converted tabs to spaces at line """
function hist_getline(file)
while !eof(file)
line = utf8(readline(file))
isempty(line) && return line
line[1] in "\r\n" || return line
end
return utf8("")
end
function hist_from_file(hp, file)
hp.history_file = file
seek(file, 0)
countlines = 0
while true
mode = :julia
line = hist_getline(file)
isempty(line) && break
countlines += 1
line[1] != '#' &&
error(invalid_history_message, repr(line[1]), " at line ", countlines)
while !isempty(line)
m = match(r"^#\s*(\w+)\s*:\s*(.*?)\s*$", line)
m === nothing && break
if m.captures[1] == "mode"
mode = symbol(m.captures[2])
end
line = hist_getline(file)
countlines += 1
end
isempty(line) && break
# Make sure starts with tab
line[1] == ' ' &&
error(munged_history_message, countlines)
line[1] != '\t' &&
error(invalid_history_message, repr(line[1]), " at line ", countlines)
lines = UTF8String[]
while !isempty(line)
push!(lines, chomp(line[2:end]))
eof(file) && break
ch = Base.peek(file)
ch == ' ' && error(munged_history_message, countlines)
ch != '\t' && break
line = hist_getline(file)
countlines += 1
end
push!(hp.modes, mode)
push!(hp.history, join(lines, '\n'))
end
seekend(file)
hp
end
function mode_idx(hist::REPLHistoryProvider, mode)
c = :julia
for (k,v) in hist.mode_mapping
v == mode && (c = k)
end
return c
end
function add_history(hist::REPLHistoryProvider, s)
str = rstrip(bytestring(s.input_buffer))
isempty(strip(str)) && return
mode = mode_idx(hist, LineEdit.mode(s))
!isempty(hist.history) &&
mode == hist.modes[end] && str == hist.history[end] && return
push!(hist.modes, mode)
push!(hist.history, str)
hist.history_file === nothing && return
entry = """
# time: $(Libc.strftime("%Y-%m-%d %H:%M:%S %Z", time()))
# mode: $mode
$(replace(str, r"^"ms, "\t"))
"""
# TODO: write-lock history file
seekend(hist.history_file)
print(hist.history_file, entry)
flush(hist.history_file)
end
function history_move(s::Union{LineEdit.MIState,LineEdit.PrefixSearchState}, hist::REPLHistoryProvider, idx::Int, save_idx::Int = hist.cur_idx)
max_idx = length(hist.history) + 1
@assert 1 <= hist.cur_idx <= max_idx
(1 <= idx <= max_idx) || return :none
idx != hist.cur_idx || return :none
# save the current line
if save_idx == max_idx
hist.last_mode = LineEdit.mode(s)
hist.last_buffer = copy(LineEdit.buffer(s))
else
hist.history[save_idx] = LineEdit.input_string(s)
hist.modes[save_idx] = mode_idx(hist, LineEdit.mode(s))
end
# load the saved line
if idx == max_idx
LineEdit.transition(s, hist.last_mode) do
LineEdit.replace_line(s, hist.last_buffer)
hist.last_mode = nothing
hist.last_buffer = IOBuffer()
end
else
if haskey(hist.mode_mapping, hist.modes[idx])
LineEdit.transition(s, hist.mode_mapping[hist.modes[idx]]) do
LineEdit.replace_line(s, hist.history[idx])
end
else
return :skip
end
end
hist.cur_idx = idx
return :ok
end
# Modified version of accept_result that also transitions modes
function LineEdit.accept_result(s, p::LineEdit.HistoryPrompt{REPLHistoryProvider})
parent = LineEdit.state(s, p).parent
hist = p.hp
if 1 <= hist.cur_idx <= length(hist.modes)
m = hist.mode_mapping[hist.modes[hist.cur_idx]]
LineEdit.transition(s, m) do
LineEdit.replace_line(LineEdit.state(s, m), LineEdit.state(s, p).response_buffer)
end
else
LineEdit.transition(s, parent)
end
end
function history_prev(s::LineEdit.MIState, hist::REPLHistoryProvider,
save_idx::Int = hist.cur_idx)
hist.last_idx = -1
m = history_move(s, hist, hist.cur_idx-1, save_idx)
if m == :ok
LineEdit.move_input_start(s)
LineEdit.reset_key_repeats(s) do
LineEdit.move_line_end(s)
end
LineEdit.refresh_line(s)
elseif m == :skip
hist.cur_idx -= 1
history_prev(s, hist, save_idx)
else
Terminals.beep(LineEdit.terminal(s))
end
end
function history_next(s::LineEdit.MIState, hist::REPLHistoryProvider,
save_idx::Int = hist.cur_idx)
cur_idx = hist.cur_idx
max_idx = length(hist.history) + 1
if cur_idx == max_idx && 0 < hist.last_idx
# issue #6312
cur_idx = hist.last_idx
hist.last_idx = -1
end
m = history_move(s, hist, cur_idx+1, save_idx)
if m == :ok
LineEdit.move_input_end(s)
LineEdit.refresh_line(s)
elseif m == :skip
hist.cur_idx += 1
history_next(s, hist, save_idx)
else
Terminals.beep(LineEdit.terminal(s))
end
end
function history_move_prefix(s::LineEdit.PrefixSearchState,
hist::REPLHistoryProvider,
prefix::AbstractString,
backwards::Bool,
cur_idx = hist.cur_idx)
cur_response = bytestring(LineEdit.buffer(s))
# when searching forward, start at last_idx
if !backwards && hist.last_idx > 0
cur_idx = hist.last_idx
end
hist.last_idx = -1
max_idx = length(hist.history)+1
idxs = backwards ? ((cur_idx-1):-1:1) : ((cur_idx+1):max_idx)
for idx in idxs
if (idx == max_idx) || (startswith(hist.history[idx], prefix) && (hist.history[idx] != cur_response || hist.modes[idx] != LineEdit.mode(s)))
m = history_move(s, hist, idx)
if m == :ok
if isempty(prefix)
# on empty prefix search, move cursor to the end
LineEdit.move_input_end(s)
else
# otherwise, keep cursor at the prefix position as a visual cue
seek(LineEdit.buffer(s), length(prefix))
end
LineEdit.refresh_line(s)
return :ok
elseif m == :skip
return history_move_prefix(s,hist,prefix,backwards,idx)
end
end
end
Terminals.beep(LineEdit.terminal(s))
end
history_next_prefix(s::LineEdit.PrefixSearchState, hist::REPLHistoryProvider, prefix::AbstractString) =
history_move_prefix(s, hist, prefix, false)
history_prev_prefix(s::LineEdit.PrefixSearchState, hist::REPLHistoryProvider, prefix::AbstractString) =
history_move_prefix(s, hist, prefix, true)
function history_search(hist::REPLHistoryProvider, query_buffer::IOBuffer, response_buffer::IOBuffer,
backwards::Bool=false, skip_current::Bool=false)
qpos = position(query_buffer)
qpos > 0 || return true
searchdata = bytestring_beforecursor(query_buffer)
response_str = bytestring(response_buffer)
# Alright, first try to see if the current match still works
a = position(response_buffer) + 1
b = min(endof(response_str), prevind(response_str, a + sizeof(searchdata)))
!skip_current && searchdata == response_str[a:b] && return true
searchfunc, searchstart, skipfunc = backwards ? (rsearch, b, prevind) :
(search, a, nextind)
skip_current && (searchstart = skipfunc(response_str, searchstart))
# Start searching
# First the current response buffer
if 1 <= searchstart <= endof(response_str)
match = searchfunc(response_str, searchdata, searchstart)
if match != 0:-1
seek(response_buffer, first(match)-1)
return true
end
end
# Now search all the other buffers
idxs = backwards ? ((hist.cur_idx-1):-1:1) : ((hist.cur_idx+1):length(hist.history))
for idx in idxs
h = hist.history[idx]
match = searchfunc(h, searchdata)
if match != 0:-1 && h != response_str && haskey(hist.mode_mapping, hist.modes[idx])
truncate(response_buffer, 0)
write(response_buffer, h)
seek(response_buffer, first(match)-1)
hist.cur_idx = idx
return true
end
end
return false
end
function history_reset_state(hist::REPLHistoryProvider)
if hist.cur_idx != length(hist.history) + 1
hist.last_idx = hist.cur_idx
hist.cur_idx = length(hist.history) + 1
end
end
LineEdit.reset_state(hist::REPLHistoryProvider) = history_reset_state(hist)
const julia_green = "\033[1m\033[32m"
function return_callback(s)
ast = Base.syntax_deprecation_warnings(false) do
Base.parse_input_line(bytestring(LineEdit.buffer(s)))
end
if !isa(ast, Expr) || (ast.head != :continue && ast.head != :incomplete)
return true
else
return false
end
end
function find_hist_file()
filename = ".julia_history"
if isfile(filename)
return filename
elseif haskey(ENV, "JULIA_HISTORY")
return ENV["JULIA_HISTORY"]
else
return joinpath(homedir(), filename)
end
end
backend(r::AbstractREPL) = r.backendref
send_to_backend(ast, backend::REPLBackendRef) = send_to_backend(ast, backend.repl_channel, backend.response_channel)
function send_to_backend(ast, req, rep)
put!(req, (ast, 1))
val, bt = take!(rep)
end
function respond(f, repl, main; pass_empty = false)
(s,buf,ok)->begin
if !ok
return transition(s, :abort)
end
line = takebuf_string(buf)
if !isempty(line) || pass_empty
reset(repl)
val, bt = send_to_backend(f(line), backend(repl))
if !ends_with_semicolon(line) || bt !== nothing
print_response(repl, val, bt, true, Base.have_color)
end
end
prepare_next(repl)
reset_state(s)
s.current_mode.sticky || transition(s, main)
end
end
function reset(repl::LineEditREPL)
raw!(repl.t, false)
print(repl.t,Base.text_colors[:normal])
end
function prepare_next(repl::LineEditREPL)
println(terminal(repl))
end
function mode_keymap(julia_prompt)
AnyDict(
'\b' => function (s,o...)
if isempty(s) || position(LineEdit.buffer(s)) == 0
buf = copy(LineEdit.buffer(s))
transition(s, julia_prompt) do
LineEdit.state(s, julia_prompt).input_buffer = buf
end
else
LineEdit.edit_backspace(s)
end
end,
"^C" => function (s,o...)
LineEdit.move_input_end(s)
LineEdit.refresh_line(s)
print(LineEdit.terminal(s), "^C\n\n")
transition(s, julia_prompt)
transition(s, :reset)
LineEdit.refresh_line(s)
end)
end
function setup_interface(repl::LineEditREPL; hascolor = repl.hascolor, extra_repl_keymap = Dict{Any,Any}[])
###
#
# This function returns the main interface that describes the REPL
# functionality, it is called internally by functions that setup a
# Terminal-based REPL frontend, but if you want to customize your REPL
# or embed the REPL in another interface, you may call this function
# directly and append it to your interface.
#
# Usage:
#
# repl_channel,response_channel = Channel(),Channel()
# start_repl_backend(repl_channel, response_channel)
# setup_interface(REPLDisplay(t),repl_channel,response_channel)
#
###
###
# We setup the interface in two stages.
# First, we set up all components (prompt,rsearch,shell,help)
# Second, we create keymaps with appropriate transitions between them
# and assign them to the components
#
###
############################### Stage I ################################
# This will provide completions for REPL and help mode
replc = REPLCompletionProvider(repl)
# Set up the main Julia prompt
julia_prompt = Prompt("julia> ";
# Copy colors from the prompt object
prompt_prefix = hascolor ? repl.prompt_color : "",
prompt_suffix = hascolor ?
(repl.envcolors ? Base.input_color : repl.input_color) : "",
keymap_func_data = repl,
complete = replc,
on_enter = return_callback)
julia_prompt.on_done = respond(Base.parse_input_line, repl, julia_prompt)
# Setup help mode
help_mode = Prompt("help?> ",
prompt_prefix = hascolor ? repl.help_color : "",
prompt_suffix = hascolor ?
(repl.envcolors ? Base.input_color : repl.input_color) : "",
keymap_func_data = repl,
complete = replc,
# When we're done transform the entered line into a call to help("$line")
on_done = respond(Docs.helpmode, repl, julia_prompt))
# Set up shell mode
shell_mode = Prompt("shell> ";
prompt_prefix = hascolor ? repl.shell_color : "",
prompt_suffix = hascolor ?
(repl.envcolors ? Base.input_color : repl.input_color) : "",
keymap_func_data = repl,
complete = ShellCompletionProvider(repl),
# Transform "foo bar baz" into `foo bar baz` (shell quoting)
# and pass into Base.repl_cmd for processing (handles `ls` and `cd`
# special)
on_done = respond(repl, julia_prompt) do line
Expr(:call, :(Base.repl_cmd), macroexpand(Expr(:macrocall, symbol("@cmd"),line)), outstream(repl))
end)
################################# Stage II #############################
# Setup history
# We will have a unified history for all REPL modes
hp = REPLHistoryProvider(Dict{Symbol,Any}(:julia => julia_prompt,
:shell => shell_mode,
:help => help_mode))
if repl.history_file
try
f = open(find_hist_file(), true, true, true, false, false)
finalizer(replc, replc->close(f))
hist_from_file(hp, f)
catch e
print_response(repl, e, catch_backtrace(), true, Base.have_color)
println(outstream(repl))
info("Disabling history file for this session.")
repl.history_file = false
end
end
history_reset_state(hp)
julia_prompt.hist = hp
shell_mode.hist = hp
help_mode.hist = hp
search_prompt, skeymap = LineEdit.setup_search_keymap(hp)
search_prompt.complete = LatexCompletions()
# Canonicalize user keymap input
if isa(extra_repl_keymap, Dict)
extra_repl_keymap = [extra_repl_keymap]
end
const repl_keymap = AnyDict(
';' => function (s,o...)
if isempty(s) || position(LineEdit.buffer(s)) == 0
buf = copy(LineEdit.buffer(s))
transition(s, shell_mode) do
LineEdit.state(s, shell_mode).input_buffer = buf
end
else
edit_insert(s, ';')
end
end,
'?' => function (s,o...)
if isempty(s) || position(LineEdit.buffer(s)) == 0
buf = copy(LineEdit.buffer(s))
transition(s, help_mode) do
LineEdit.state(s, help_mode).input_buffer = buf
end
else
edit_insert(s, '?')
end
end,
# Bracketed Paste Mode
"\e[200~" => (s,o...)->begin
input = LineEdit.bracketed_paste(s)
buf = copy(LineEdit.buffer(s))
edit_insert(buf, input)
string = takebuf_string(buf)
curspos = position(LineEdit.buffer(s))
pos = 1
inputsz = sizeof(input)
sz = sizeof(string)
while pos <= sz
oldpos = pos
ast, pos = Base.syntax_deprecation_warnings(false) do
Base.parse(string, pos, raise=false)
end
if isa(ast, Expr) && ast.head == :error
# Insert all the remaining text as one line (might be empty)
LineEdit.replace_line(s, strip(bytestring(string.data[max(oldpos, 1):end])))
seek(LineEdit.buffer(s), max(curspos-oldpos+inputsz, 0))
LineEdit.refresh_line(s)
break
end
# Get the line and strip leading and trailing whitespace
line = strip(bytestring(string.data[max(oldpos, 1):min(pos-1, sz)]))
isempty(line) && continue
LineEdit.replace_line(s, line)
if oldpos <= curspos
seek(LineEdit.buffer(s),curspos-oldpos+inputsz)
end
LineEdit.refresh_line(s)
(pos > sz && last(string) != '\n') && break
if !isa(ast, Expr) || (ast.head != :continue && ast.head != :incomplete)
LineEdit.commit_line(s)
# This is slightly ugly but ok for now
terminal = LineEdit.terminal(s)
raw!(terminal, false) && disable_bracketed_paste(terminal)
LineEdit.mode(s).on_done(s, LineEdit.buffer(s), true)
raw!(terminal, true) && enable_bracketed_paste(terminal)
else
break
end
end
end,
)
prefix_prompt, prefix_keymap = LineEdit.setup_prefix_keymap(hp, julia_prompt)
a = Dict{Any,Any}[skeymap, repl_keymap, prefix_keymap, LineEdit.history_keymap, LineEdit.default_keymap, LineEdit.escape_defaults]
prepend!(a, extra_repl_keymap)
julia_prompt.keymap_dict = LineEdit.keymap(a)
mk = mode_keymap(julia_prompt)
b = Dict{Any,Any}[skeymap, mk, prefix_keymap, LineEdit.history_keymap, LineEdit.default_keymap, LineEdit.escape_defaults]
prepend!(b, extra_repl_keymap)
shell_mode.keymap_dict = help_mode.keymap_dict = LineEdit.keymap(b)
ModalInterface([julia_prompt, shell_mode, help_mode, search_prompt, prefix_prompt])
end
function run_frontend(repl::LineEditREPL, backend)
d = REPLDisplay(repl)
dopushdisplay = repl.specialdisplay === nothing && !in(d,Base.Multimedia.displays)
dopushdisplay && pushdisplay(d)
if !isdefined(repl,:interface)
interface = repl.interface = setup_interface(repl)
else
interface = repl.interface
end
repl.backendref = backend
run_interface(repl.t, interface)
dopushdisplay && popdisplay(d)
end
if isdefined(Base, :banner_color)
banner(io, t) = banner(io, hascolor(t))
banner(io, x::Bool) = print(io, x ? Base.banner_color : Base.banner_plain)
else
banner(io,t) = Base.banner(io)
end
## StreamREPL ##
type StreamREPL <: AbstractREPL
stream::IO
prompt_color::AbstractString
input_color::AbstractString
answer_color::AbstractString
waserror::Bool
StreamREPL(stream,pc,ic,ac) = new(stream,pc,ic,ac,false)
end
outstream(s::StreamREPL) = s.stream
StreamREPL(stream::IO) = StreamREPL(stream, julia_green, Base.text_colors[:white], Base.answer_color())
answer_color(r::LineEditREPL) = r.envcolors ? Base.answer_color() : r.answer_color
answer_color(r::StreamREPL) = r.answer_color
input_color(r::LineEditREPL) = r.envcolors ? Base.input_color() : r.input_color
input_color(r::StreamREPL) = r.input_color
function run_repl(stream::IO)
repl =
@async begin
repl_channel = Channel(1)
response_channel = Channel(1)
start_repl_backend(repl_channel, response_channel)
StreamREPL_frontend(repl, repl_channel, response_channel)
end
repl
end
function ends_with_semicolon(line)
match = rsearch(line, ';')
if match != 0
for c in line[(match+1):end]
isspace(c) || return c == '#'
end
return true
end
return false
end
function run_frontend(repl::StreamREPL, backend::REPLBackendRef)
have_color = Base.have_color
banner(repl.stream, have_color)
d = REPLDisplay(repl)
dopushdisplay = !in(d,Base.Multimedia.displays)
dopushdisplay && pushdisplay(d)
repl_channel, response_channel = backend.repl_channel, backend.response_channel
while repl.stream.open
if have_color
print(repl.stream,repl.prompt_color)
end
print(repl.stream, "julia> ")
if have_color
print(repl.stream, input_color(repl))
end
line = readline(repl.stream)
if !isempty(line)
ast = Base.parse_input_line(line)
if have_color
print(repl.stream, Base.color_normal)
end
put!(repl_channel, (ast, 1))
val, bt = take!(response_channel)
if !ends_with_semicolon(line)
print_response(repl, val, bt, true, have_color)
end
end
end
# Terminate Backend
put!(repl_channel, (nothing, -1))
dopushdisplay && popdisplay(d)
end
function start_repl_server(port)
listen(port) do server, status
client = accept(server)
run_repl(client)
end
end
end # module