mirror of https://github.com/japl-lang/jale.git
153 lines
3.6 KiB
Nim
153 lines
3.6 KiB
Nim
import strformat
|
|
import strutils
|
|
import tables
|
|
|
|
import line
|
|
import multiline
|
|
import keycodes
|
|
import event
|
|
import renderer
|
|
import uniterm
|
|
|
|
type
|
|
JaleEvent* = enum
|
|
jeKeypress, jeQuit, jeFinish, jePreRead, jePostRead
|
|
|
|
EditorState = enum
|
|
esOutside, esTyping, esFinishing, esQuitting
|
|
|
|
LineEditor* = ref object
|
|
# permanents
|
|
keystrokes*: Event[int]
|
|
events*: Event[JaleEvent]
|
|
prompt*: string
|
|
|
|
# permanent internals: none
|
|
|
|
# per-read contents
|
|
content*: Multiline
|
|
lastKeystroke*: int
|
|
# per-read internals
|
|
state: EditorState
|
|
rendered: int # how many lines were printed last full refresh
|
|
forceRedraw: bool
|
|
|
|
# getter/setter sorts
|
|
|
|
proc unfinish*(le: LineEditor) =
|
|
le.state = esTyping
|
|
|
|
proc finish*(le: LineEditor) =
|
|
le.state = esFinishing
|
|
# can be overwritten to false, inside the event
|
|
le.events.call(jeFinish)
|
|
|
|
proc quit*(le: LineEditor) =
|
|
le.state = esQuitting
|
|
le.events.call(jeQuit)
|
|
|
|
proc redraw*(le: LineEditor) =
|
|
le.forceRedraw = true
|
|
|
|
# constructor
|
|
|
|
proc newLineEditor*: LineEditor =
|
|
new(result)
|
|
result.content = newMultiline()
|
|
result.keystrokes.new()
|
|
result.events.new()
|
|
result.prompt = ""
|
|
result.rendered = 0
|
|
result.lastKeystroke = -1
|
|
result.forceRedraw = false
|
|
result.state = esOutside
|
|
|
|
# priv/pub methods
|
|
|
|
proc reset(editor: LineEditor) =
|
|
## Resets state to outside, resets internal rendering details
|
|
## resets last keystroke, creates new contents
|
|
editor.state = esOutside
|
|
editor.rendered = 0
|
|
editor.content = newMultiline()
|
|
editor.lastKeystroke = -1
|
|
editor.forceRedraw = false
|
|
|
|
proc render(editor: LineEditor, wr: var TermWriter, line: int = -1, hscroll: bool = true) =
|
|
var y = line
|
|
if y == -1:
|
|
y = editor.content.Y
|
|
|
|
let prompt = if y == 0: editor.prompt else: " ".repeat(editor.prompt.len())
|
|
wr.renderLine(prompt, editor.content.getLine(y), 0)
|
|
|
|
proc fullRender(editor: LineEditor, wr: var TermWriter) =
|
|
# from the top cursor pos, it draws the entire multiline prompt, then
|
|
# moves cursor to current y
|
|
for i in countup(0, editor.content.high()):
|
|
editor.render(wr, i, false)
|
|
if i < editor.rendered:
|
|
wr.down(1)
|
|
else:
|
|
wr.lf()
|
|
inc editor.rendered
|
|
|
|
var extraup = 0
|
|
while editor.content.len() < editor.rendered:
|
|
wr.clearLine()
|
|
wr.down(1)
|
|
dec editor.rendered
|
|
inc extraup
|
|
|
|
wr.up(editor.content.len() - editor.content.Y + extraup)
|
|
|
|
proc moveCursorToEnd(editor: LineEditor, wr: var TermWriter) =
|
|
# only called when read finished
|
|
if editor.content.high() > editor.content.Y:
|
|
wr.down(editor.content.high() - editor.content.Y)
|
|
wr.lf()
|
|
|
|
proc read*(editor: LineEditor): string =
|
|
|
|
editor.state = esTyping
|
|
editor.events.call(jePreRead)
|
|
|
|
var buffer: TermWriter
|
|
|
|
# starts at the top, full render moves it into the right y
|
|
editor.fullRender(buffer)
|
|
|
|
while editor.state == esTyping:
|
|
|
|
# refresh current line every time
|
|
buffer.setCursorX(editor.content.X + editor.prompt.len())
|
|
# get key (with escapes)
|
|
buffer.flush()
|
|
let key = getKey()
|
|
# record y pos
|
|
let preY = editor.content.Y
|
|
# call the events
|
|
editor.lastKeystroke = key
|
|
editor.keystrokes.call(key)
|
|
editor.events.call(jeKeypress)
|
|
# redraw everything if y changed
|
|
if editor.forceRedraw or preY != editor.content.Y:
|
|
# move to the top
|
|
if preY > 0:
|
|
buffer.up(preY)
|
|
# move to the right y
|
|
editor.fullRender(buffer)
|
|
if editor.forceRedraw:
|
|
editor.forceRedraw = false
|
|
else:
|
|
editor.render(buffer)
|
|
|
|
editor.events.call(jePostRead)
|
|
|
|
# move cursor to end
|
|
editor.moveCursorToEnd(buffer)
|
|
buffer.flush()
|
|
if editor.state == esFinishing:
|
|
result = editor.content.getContent()
|
|
editor.reset()
|