asciinema.org/app/assets/javascripts/ansi-interpreter.js.coffee
2012-01-19 22:41:55 +01:00

149 lines
4.6 KiB
CoffeeScript

class AsciiIo.AnsiInterpreter
constructor: (terminal) ->
@terminal = terminal
@compilePatterns()
PATTERNS:
"\x07": (data) -> # bell
"\x08": (data) -> @terminal.bs()
"\x09": (data) -> # Moves the cursor to the next tab stop
"\x0a": (data) -> @terminal.cursorDown 1
"\x0d": (data) -> @terminal.cr()
"\x0e": (data) ->
"\x0f": (data) ->
"\x82": (data) -> # Reserved (?)
"\x94": (data) -> # Cancel Character, ignore previous character
# 20 - 7e
"([\x20-\x7e]|\xe2..|[\xc2\xc4\xc5].)+": (data, match) ->
@terminal.print match[0]
"\x1b\\(B": (data) -> # SCS (Set G0 Character SET)
"\x1b\\[(?:[0-9]+)?(?:;[0-9]+)*([\x40-\x7e])": (data, match) ->
@params = []
re = /(\d+)/g
m = undefined
@params.push parseInt(m[1]) while m = re.exec(match[0])
@n = @params[0]
@m = @params[1]
@handleCSI match[1]
# private standards
"\x1b\\[\\?([\x30-\x3f]+)([hlsr])": (data, match) ->
# h = Sets DEC/xterm specific mode (http://ttssh2.sourceforge.jp/manual/en/about/ctrlseq.html#decmode)
# l = Resets mode (http://ttssh2.sourceforge.jp/manual/en/about/ctrlseq.html#mode)
# 1001 + s = ?
# 1001 + r = ?
modes = match[1].split(";")
action = match[2]
mode = undefined
for mode in modes
if mode is "1049"
if action is "h"
# Save cursor position, switch to alternate screen buffer, and clear screen.
@terminal.saveCursor()
@terminal.switchToAlternateBuffer()
@terminal.clearScreen()
else if action is "l"
# Clear screen, switch to normal screen buffer, and restore cursor position.
@terminal.clearScreen()
@terminal.switchToNormalBuffer()
@terminal.restoreCursor()
else if mode is "1000"
# Enables/disables normal mouse tracking
else if mode is "1001"
# pbly sth with mouse/keys...
else if mode is "1002"
# 2002 + h / l = mouse tracking stuff
else if mode is "1"
# 1 + h / l = cursor keys stuff
else if mode is "47"
if action is "h"
@terminal.switchToAlternateBuffer()
else if action is "l"
@terminal.switchToNormalBuffer()
else if mode is "25"
if action is "h"
@terminal.showCursor true
else if action is "l"
@terminal.showCursor false
else if mode is "12"
if action is "h"
# blinking cursor
else action is "l"
# steady cursor
else
throw "unknown mode: " + mode + action
"\x1b\x3d": (data) -> # DECKPAM - Set keypad to applications mode (ESCape instead of digits)
"\x1b\x3e": (data) -> # DECKPNM - Set keypad to numeric mode (digits intead of ESCape seq)
"\x1b\x5d[012]\x3b.*?\x07": (data, match) -> # OSC - Operating System Command (terminal title)
"\x1b\\[>c": (data) -> # Secondary Device Attribute request (?)
"\x1bP([^\\\\])*?\\\\": (data) -> # DCS, Device Control String
"\x1bM": ->
@terminal.ri @n or 1
"\x1b\x37": (data) -> # save cursor pos and char attrs
@terminal.saveCursor()
"\x1b\x38": (data) -> # restore cursor pos and char attrs
@terminal.restoreCursor()
handleCSI: (term) ->
switch term
when "@"
@terminal.reserveCharacters @n
when "A"
@terminal.cursorUp @n or 1
when "B"
@terminal.cursorDown @n or 1
when "C"
@terminal.cursorForward @n or 1
when "D"
@terminal.cursorBack @n or 1
when "H"
@terminal.setCursorPos @n or 1, @m or 1
when "J"
@terminal.eraseData @n or 0
when "K"
@terminal.eraseInLine @n or 0
when "L"
@terminal.insertLines @cursorY, @n or 1
when "l" # l, Reset mode
console.log "(TODO) reset: " + @n
when "m"
@terminal.setSGR @params
when "P" # DCH - Delete Character, from current position to end of field
@terminal.deleteCharacter @n or 1
when "r" # Set top and bottom margins (scroll region on VT100)
else
throw "no handler for CSI term: " + term
compilePatterns: ->
@COMPILED_PATTERNS = ([new RegExp("^" + re), f] for re, f of @PATTERNS)
feed: (data) ->
while data.length > 0
match = null
for pattern in @COMPILED_PATTERNS
match = pattern[0].exec(data)
if match
handler = pattern[1]
handler.call(this, data, match)
data = data.slice(match[0].length)
break
break unless match
@terminal.render()
data