You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
407 lines
13 KiB
407 lines
13 KiB
const $ = require('../lib/chibi')
|
|
const { qs } = require('../utils')
|
|
|
|
// constants for decoding the update blob
|
|
const SEQ_SKIP = 1
|
|
const SEQ_REPEAT = 2
|
|
const SEQ_SET_COLORS = 3
|
|
const SEQ_SET_ATTRS = 4
|
|
const SEQ_SET_FG = 5
|
|
const SEQ_SET_BG = 6
|
|
const SEQ_SET_ATTR_0 = 7
|
|
|
|
function du (str) {
|
|
let num = str.codePointAt(0)
|
|
if (num > 0xDFFF) num -= 0x800
|
|
return num - 1
|
|
}
|
|
|
|
/* eslint-disable no-multi-spaces */
|
|
const TOPIC_SCREEN_OPTS = 'O'
|
|
const TOPIC_CONTENT = 'S'
|
|
const TOPIC_TITLE = 'T'
|
|
const TOPIC_BUTTONS = 'B'
|
|
const TOPIC_CURSOR = 'C'
|
|
const TOPIC_INTERNAL = 'D'
|
|
const TOPIC_BELL = '!'
|
|
|
|
const OPT_CURSOR_VISIBLE = (1 << 0)
|
|
const OPT_DEBUGBAR = (1 << 1)
|
|
const OPT_CURSORS_ALT_MODE = (1 << 2)
|
|
const OPT_NUMPAD_ALT_MODE = (1 << 3)
|
|
const OPT_FN_ALT_MODE = (1 << 4)
|
|
const OPT_CLICK_TRACKING = (1 << 5)
|
|
const OPT_MOVE_TRACKING = (1 << 6)
|
|
const OPT_SHOW_BUTTONS = (1 << 7)
|
|
const OPT_SHOW_CONFIG_LINKS = (1 << 8)
|
|
// const OPT_CURSOR_SHAPE = (7 << 9)
|
|
const OPT_CRLF_MODE = (1 << 12)
|
|
const OPT_BRACKETED_PASTE = (1 << 13)
|
|
const OPT_REVERSE_VIDEO = (1 << 14)
|
|
|
|
const ATTR_FG = (1 << 0) // 1 if not using default background color (ignore cell bg) - color extension bit
|
|
const ATTR_BG = (1 << 1) // 1 if not using default foreground color (ignore cell fg) - color extension bit
|
|
const ATTR_BOLD = (1 << 2) // Bold font
|
|
const ATTR_UNDERLINE = (1 << 3) // Underline decoration
|
|
const ATTR_INVERSE = (1 << 4) // Invert colors - this is useful so we can clear then with SGR manipulation commands
|
|
const ATTR_BLINK = (1 << 5) // Blinking
|
|
const ATTR_ITALIC = (1 << 6) // Italic font
|
|
const ATTR_STRIKE = (1 << 7) // Strike-through decoration
|
|
const ATTR_OVERLINE = (1 << 8) // Over-line decoration
|
|
const ATTR_FAINT = (1 << 9) // Faint foreground color (reduced alpha)
|
|
const ATTR_FRAKTUR = (1 << 10) // Fraktur font (unicode substitution)
|
|
/* eslint-enable no-multi-spaces */
|
|
|
|
module.exports = class ScreenParser {
|
|
constructor (screen) {
|
|
this.screen = screen
|
|
|
|
// true if TermScreen#load was called at least once
|
|
this.contentLoaded = false
|
|
}
|
|
|
|
/**
|
|
* Hide the warning message about failed data load
|
|
*/
|
|
hideLoadFailedMsg () {
|
|
if (!this.contentLoaded) {
|
|
let errmsg = qs('#load-failed')
|
|
if (errmsg) errmsg.parentNode.removeChild(errmsg)
|
|
this.contentLoaded = true
|
|
}
|
|
}
|
|
|
|
loadUpdate (str) {
|
|
// console.log(`update ${str}`)
|
|
// current index
|
|
let ci = 0
|
|
let strArray = Array.from ? Array.from(str) : str.split('')
|
|
|
|
let text
|
|
let resized = false
|
|
const topics = du(strArray[ci++])
|
|
// this.screen.cursor.hanging = !!(attributes & (1 << 1))
|
|
|
|
while (ci < strArray.length) {
|
|
const topic = strArray[ci++]
|
|
|
|
if (topic === TOPIC_SCREEN_OPTS) {
|
|
const newHeight = du(strArray[ci++])
|
|
const newWidth = du(strArray[ci++])
|
|
const theme = du(strArray[ci++])
|
|
const defFg = (du(strArray[ci++]) & 0xFFFF) | ((du(strArray[ci++]) & 0xFFFF) << 16)
|
|
const defBg = (du(strArray[ci++]) & 0xFFFF) | ((du(strArray[ci++]) & 0xFFFF) << 16)
|
|
const attributes = du(strArray[ci++])
|
|
|
|
// theming
|
|
this.screen.renderer.loadTheme(theme)
|
|
this.screen.renderer.setDefaultColors(defFg, defBg)
|
|
|
|
// apply size
|
|
resized = (this.screen.window.height !== newHeight) || (this.screen.window.width !== newWidth)
|
|
this.screen.window.height = newHeight
|
|
this.screen.window.width = newWidth
|
|
|
|
// process attributes
|
|
this.screen.cursor.visible = !!(attributes & OPT_CURSOR_VISIBLE)
|
|
|
|
this.screen.input.setAlts(
|
|
!!(attributes & OPT_CURSORS_ALT_MODE),
|
|
!!(attributes & OPT_NUMPAD_ALT_MODE),
|
|
!!(attributes & OPT_FN_ALT_MODE),
|
|
!!(attributes & OPT_CRLF_MODE)
|
|
)
|
|
|
|
const trackMouseClicks = !!(attributes & OPT_CLICK_TRACKING)
|
|
const trackMouseMovement = !!(attributes & OPT_MOVE_TRACKING)
|
|
|
|
// 0 - Block blink 2 - Block steady (1 is unused)
|
|
// 3 - Underline blink 4 - Underline steady
|
|
// 5 - I-bar blink 6 - I-bar steady
|
|
let cursorShape = (attributes >> 9) & 0x07
|
|
// if it's not zero, decrement such that the two most significant bits
|
|
// are the type and the least significant bit is the blink state
|
|
if (cursorShape > 0) cursorShape--
|
|
const cursorStyle = cursorShape >> 1
|
|
const cursorBlinking = !(cursorShape & 1)
|
|
if (cursorStyle === 0) this.screen.cursor.style = 'block'
|
|
else if (cursorStyle === 1) this.screen.cursor.style = 'line'
|
|
else if (cursorStyle === 2) this.screen.cursor.style = 'bar'
|
|
if (this.screen.cursor.blinking !== cursorBlinking) {
|
|
this.screen.cursor.blinking = cursorBlinking
|
|
this.screen.renderer.resetCursorBlink()
|
|
}
|
|
|
|
this.screen.input.setMouseMode(trackMouseClicks, trackMouseMovement)
|
|
this.screen.selection.selectable = !trackMouseClicks && !trackMouseMovement
|
|
$(this.screen.canvas).toggleClass('selectable', this.screen.selection.selectable)
|
|
this.screen.mouseMode = {
|
|
clicks: trackMouseClicks,
|
|
movement: trackMouseMovement
|
|
}
|
|
|
|
const showButtons = !!(attributes & OPT_SHOW_BUTTONS)
|
|
const showConfigLinks = !!(attributes & OPT_SHOW_CONFIG_LINKS)
|
|
|
|
$('.x-term-conf-btn').toggleClass('hidden', !showConfigLinks)
|
|
$('#action-buttons').toggleClass('hidden', !showButtons)
|
|
|
|
this.screen.bracketedPaste = !!(attributes & OPT_BRACKETED_PASTE)
|
|
this.screen.reverseVideo = !!(attributes & OPT_REVERSE_VIDEO)
|
|
|
|
const debugbar = !!(attributes & OPT_DEBUGBAR)
|
|
// TODO do something with debugbar
|
|
|
|
} else if (topic === TOPIC_CURSOR) {
|
|
|
|
// cursor position
|
|
const cursorY = du(strArray[ci++])
|
|
const cursorX = du(strArray[ci++])
|
|
const hanging = du(strArray[ci++])
|
|
|
|
const cursorMoved = (
|
|
hanging !== this.screen.cursor.hanging ||
|
|
cursorX !== this.screen.cursor.x ||
|
|
cursorY !== this.screen.cursor.y)
|
|
|
|
this.screen.cursor.x = cursorX
|
|
this.screen.cursor.y = cursorY
|
|
|
|
this.screen.cursor.hanging = !!hanging
|
|
|
|
if (cursorMoved) {
|
|
this.screen.renderer.resetCursorBlink()
|
|
this.screen.emit('cursor-moved')
|
|
}
|
|
|
|
this.screen.renderer.scheduleDraw('cursor-moved')
|
|
} else if (topic === TOPIC_TITLE) {
|
|
|
|
// TODO optimize this
|
|
text = ''
|
|
while (ci < strArray.length) {
|
|
let c = strArray[ci++]
|
|
if (c !== '\x01') {
|
|
text += c
|
|
} else {
|
|
break
|
|
}
|
|
}
|
|
|
|
qs('#screen-title').textContent = text
|
|
if (text.length === 0) text = 'Terminal'
|
|
qs('title').textContent = `${text} :: ESPTerm`
|
|
|
|
} else if (topic === TOPIC_BUTTONS) {
|
|
const count = du(strArray[ci++])
|
|
|
|
let labels = []
|
|
for (let j = 0; j < count; j++) {
|
|
text = ''
|
|
while (ci < strArray.length) {
|
|
let c = strArray[ci++]
|
|
if (c === '\x01') break
|
|
text += c
|
|
}
|
|
labels.push(text)
|
|
}
|
|
|
|
this.screen.emit('button-labels', labels)
|
|
} else if (topic === TOPIC_BELL) {
|
|
|
|
this.screen.beep()
|
|
|
|
} else if (topic === TOPIC_INTERNAL) {
|
|
// debug info
|
|
|
|
const flags = du(strArray[ci++])
|
|
const cursorAttrs = du(strArray[ci++])
|
|
const regionStart = du(strArray[ci++])
|
|
const regionEnd = du(strArray[ci++])
|
|
const charsetGx = du(strArray[ci++])
|
|
const charsetG0 = strArray[ci++]
|
|
const charsetG1 = strArray[ci++]
|
|
const freeHeap = du(strArray[ci++])
|
|
const clientCount = du(strArray[ci++])
|
|
|
|
this.screen.emit('internal', {
|
|
flags,
|
|
cursorAttrs,
|
|
regionStart,
|
|
regionEnd,
|
|
charsetGx,
|
|
charsetG0,
|
|
charsetG1,
|
|
freeHeap,
|
|
clientCount
|
|
})
|
|
} else if (topic === TOPIC_CONTENT) {
|
|
// set screen content
|
|
|
|
const frameY = du(strArray[ci++])
|
|
const frameX = du(strArray[ci++])
|
|
const frameHeight = du(strArray[ci++])
|
|
const frameWidth = du(strArray[ci++])
|
|
|
|
if (this.screen._debug && this.screen.window.debug) {
|
|
this.screen._debug.pushFrame([frameX, frameY, frameWidth, frameHeight])
|
|
}
|
|
|
|
// content
|
|
let fg = 7
|
|
let bg = 0
|
|
let attrs = 0
|
|
let cell = 0 // cell index
|
|
let lastChar = ' '
|
|
let frameLength = frameWidth * frameHeight
|
|
let screenLength = this.screen.window.width * this.screen.window.height
|
|
|
|
if (resized) {
|
|
this.screen.updateSize()
|
|
this.screen.blinkingCellCount = 0
|
|
this.screen.screen = new Array(screenLength).fill(' ')
|
|
this.screen.screenFG = new Array(screenLength).fill(' ')
|
|
this.screen.screenBG = new Array(screenLength).fill(' ')
|
|
this.screen.screenAttrs = new Array(screenLength).fill(0)
|
|
}
|
|
|
|
const MASK_LINE_ATTR = ATTR_UNDERLINE | ATTR_OVERLINE | ATTR_STRIKE
|
|
const MASK_BLINK = ATTR_BLINK
|
|
|
|
let pushCell = () => {
|
|
// Remove blink attribute if it wouldn't have any effect
|
|
let myAttrs = attrs
|
|
let hasFG = attrs & ATTR_FG
|
|
let hasBG = attrs & ATTR_BG
|
|
let cellFG = fg
|
|
let cellBG = bg
|
|
|
|
// use 0,0 if no fg/bg. this is to match back-end implementation
|
|
// and allow leaving out fg/bg setting for cells with none
|
|
if (!hasFG) cellFG = 0
|
|
if (!hasBG) cellBG = 0
|
|
|
|
if ((myAttrs & MASK_BLINK) !== 0 &&
|
|
((lastChar === ' ' && ((myAttrs & MASK_LINE_ATTR) === 0)) || // no line styles
|
|
(fg === bg && hasFG && hasBG) // invisible text
|
|
)
|
|
) {
|
|
myAttrs ^= MASK_BLINK
|
|
}
|
|
// update blinking cells counter if blink state changed
|
|
if ((this.screen.screenAttrs[cell] & MASK_BLINK) !== (myAttrs & MASK_BLINK)) {
|
|
if (myAttrs & MASK_BLINK) this.screen.blinkingCellCount++
|
|
else this.screen.blinkingCellCount--
|
|
}
|
|
|
|
let cellXInFrame = cell % frameWidth
|
|
let cellYInFrame = Math.floor(cell / frameWidth)
|
|
let index = (frameY + cellYInFrame) * this.screen.window.width + frameX + cellXInFrame
|
|
|
|
// 8 dark system colors turn bright when bold
|
|
if ((myAttrs & ATTR_BOLD) && !(myAttrs & ATTR_FAINT) && hasFG && cellFG < 8) {
|
|
cellFG += 8
|
|
}
|
|
|
|
this.screen.screen[index] = lastChar
|
|
this.screen.screenFG[index] = cellFG
|
|
this.screen.screenBG[index] = cellBG
|
|
this.screen.screenAttrs[index] = myAttrs
|
|
}
|
|
|
|
while (ci < strArray.length && cell < frameLength) {
|
|
let character = strArray[ci++]
|
|
let charCode = character.codePointAt(0)
|
|
|
|
let data, count
|
|
switch (charCode) {
|
|
case SEQ_REPEAT:
|
|
count = du(strArray[ci++])
|
|
for (let j = 0; j < count; j++) {
|
|
pushCell()
|
|
if (++cell > frameLength) break
|
|
}
|
|
break
|
|
|
|
case SEQ_SKIP:
|
|
cell += du(strArray[ci++])
|
|
break
|
|
|
|
case SEQ_SET_COLORS:
|
|
data = du(strArray[ci++])
|
|
fg = data & 0xFF
|
|
bg = (data >> 8) & 0xFF
|
|
break
|
|
|
|
case SEQ_SET_ATTRS:
|
|
data = du(strArray[ci++])
|
|
attrs = data & 0xFFFF
|
|
break
|
|
|
|
case SEQ_SET_ATTR_0:
|
|
attrs = 0
|
|
break
|
|
|
|
case SEQ_SET_FG:
|
|
data = du(strArray[ci++])
|
|
if (data & 0x10000) {
|
|
data &= 0xFFF
|
|
data |= (du(strArray[ci++]) & 0xFFF) << 12
|
|
data += 256
|
|
}
|
|
fg = data
|
|
break
|
|
|
|
case SEQ_SET_BG:
|
|
data = du(strArray[ci++])
|
|
if (data & 0x10000) {
|
|
data &= 0xFFF
|
|
data |= (du(strArray[ci++]) & 0xFFF) << 12
|
|
data += 256
|
|
}
|
|
bg = data
|
|
break
|
|
|
|
default:
|
|
if (charCode < 32) character = '\ufffd'
|
|
lastChar = character
|
|
pushCell()
|
|
cell++
|
|
}
|
|
}
|
|
|
|
if (this.screen.window.debug) console.log(`Blinky cells: ${this.screen.blinkingCellCount}`)
|
|
|
|
this.screen.renderer.scheduleDraw('load', 16)
|
|
this.screen.conn.emit('load')
|
|
|
|
}
|
|
|
|
if ((topics & 0x3B) !== 0) this.hideLoadFailedMsg()
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Loads a message from the server, and optionally a theme.
|
|
* @param {string} str - the message
|
|
*/
|
|
load (str) {
|
|
const content = str.substr(1)
|
|
|
|
// This is a good place for debugging the message
|
|
// console.log(str)
|
|
|
|
switch (str[0]) {
|
|
case 'U':
|
|
this.loadUpdate(content)
|
|
break
|
|
|
|
case 'G':
|
|
this.screen.showNotification(content)
|
|
break
|
|
|
|
default:
|
|
console.warn(`Bad data message type; ignoring.\n${JSON.stringify(str)}`)
|
|
}
|
|
}
|
|
}
|
|
|