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433 lines
10 KiB
CoffeeScript
433 lines
10 KiB
CoffeeScript
class AsciiIo.VT
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constructor: (@cols, @lines, @renderer) ->
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@data = ''
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@resetTerminal()
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@render()
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@compilePatterns()
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noop: ->
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# handleC0ControlSet: (data) ->
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# console.log 'handling C0'
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handlePrintableCharacters: (text) ->
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# handleC1ControlSet: (data) ->
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# handleControlSequence: (data) ->
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_C0_PATTERNS:
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# C0 set of 7-bit control characters
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"[\x00-\x1f]":
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# bell
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"\x07": (data) -> @bell()
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# backspace
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"\x08": (data) -> @backspace()
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# Move the cursor to the next tab stop
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"\x09": (data) ->
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"\x0a": (data) -> @lineFeed()
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"\x0d": (data) -> @carriageReturn()
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"\x0e": (data) ->
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"\x0f": (data) ->
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# Reserved (?)
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"\x82": (data) ->
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# Cancel Character, ignore previous character
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"\x94": (data) ->
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# Escape sequence
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"\x1b": _.extend({}, @_C0_PATTERNS, {
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# Control sequence
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"\x1b\\[": @_CS_PATTERNS
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})
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_CS_PATTERNS:
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"sth": 1
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_PATTERNS: _.extend({}, @_C0_PATTERNS, {
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# Printable characters
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"([\x20-\x7e])+": @handlePrintableCharacters
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# "Delete", always and everywhere ignored
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"[\x7f\xff]": @noop
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# C1 control set
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"[\x80-\x9f]":
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# Control sequence
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"\x9b": @_CS_PATTERNS
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# G1 Displayable, 94 additional displayable characters
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"[\xa1-\xfe]": @handlePrintableCharacters
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# Always and everywhere a blank space
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"\xa0": -> @handlePrintableCharacters(' ')
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})
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PATTERNS:
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"\x00": (data) ->
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"\x07": (data) -> @bell()
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"\x08": (data) -> @backspace()
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"\x09": (data) -> @buffer.goToNextHorizontalTabStop()
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"\x0a": (data) -> @lineFeed()
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"\x0b": (data) -> @verticalTab()
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"\x0c": (data) -> @formFeed()
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"\x0d": (data) -> @carriageReturn()
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"\x0e": (data) ->
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"\x0f": (data) ->
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"\x82": (data) -> # Reserved (?)
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"\x85": (data) -> @setHorizontalTabStop()
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"\x94": (data) -> # Cancel Character, ignore previous character
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# 20 - 7e
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"([\x20-\x7e]|\xe2..|[\xc2\xc4\xc5].)+": (data, match) ->
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@buffer.print match[0]
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"\x1b\\(B": (data) -> # SCS (Set G0 Character SET)
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"\x1b\\[([0-9;]*)([\x40-\x7e])": (data, match) ->
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if match[1].length == 0
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@params = []
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else
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@params = _(match[1].split(';')).map (n) -> if n is '' then undefined else parseInt(n)
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@n = @params[0]
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@m = @params[1]
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@handleCS match[2]
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# private standards
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"\x1b\\[\\?([\x30-\x3f]+)([hlsr])": (data, match) ->
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# h = Sets DEC/xterm specific mode (http://ttssh2.sourceforge.jp/manual/en/about/ctrlseq.html#decmode)
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# l = Resets mode (http://ttssh2.sourceforge.jp/manual/en/about/ctrlseq.html#mode)
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# 1001 + s = ?
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# 1001 + r = ?
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modes = match[1].split(";")
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action = match[2]
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mode = undefined
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for mode in modes
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if mode is "1"
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# 1 + h / l = cursor keys stuff
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else if mode is "5"
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# Reverse/normal video - ignoring
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else if mode is "7"
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# Enables/disables autowrap mode
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else if mode is "12"
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if action is "h"
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# blinking cursor
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else action is "l"
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# steady cursor
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else if mode is "25"
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if action is "h"
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@showCursor()
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else if action is "l"
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@hideCursor()
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else if mode is "47"
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if action is "h"
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@switchToAlternateBuffer()
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else if action is "l"
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@switchToNormalBuffer()
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else if mode is "1000"
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# Enables/disables normal mouse tracking
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else if mode is "1001"
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# pbly sth with mouse/keys...
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else if mode is "1002"
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# 2002 + h / l = mouse tracking stuff
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else if mode is "1049"
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if action is "h"
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# Save cursor position, switch to alternate screen buffer, and clear screen.
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@switchToAlternateBuffer()
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@clearScreen()
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else if action is "l"
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# Clear screen, switch to normal screen buffer, and restore cursor position.
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@clearScreen()
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@switchToNormalBuffer()
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else
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throw "unknown mode: " + mode + action
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"\x1b\x3d": (data) -> # DECKPAM - Set keypad to applications mode (ESCape instead of digits)
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"\x1b\x3e": (data) -> # DECKPNM - Set keypad to numeric mode (digits intead of ESCape seq)
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"\x1b\\\\": -> # String Terminator (VT125 exits graphics)
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"\x1b\x5d[012]\x3b.*?\x07": (data, match) -> # OSC - Operating System Command (terminal title)
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"\x1b\\[>c": (data) -> # Secondary Device Attribute request (?)
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"\x1bc": -> @resetTerminal()
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"\x1bP([^\\\\])*?\\\\": (data) -> # DCS, Device Control String
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"\x1bD": -> @index()
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"\x1bE": -> @newLine()
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"\x1bH": -> @setHorizontalTabStop()
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"\x1bM": -> @reverseIndex()
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"\x1bk": -> # NAPLPS lock-shift G1 to GR
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"\x1b7": (data) -> # save cursor pos and char attrs
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@saveTerminalState()
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"\x1b8": (data) -> # restore cursor pos and char attrs
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@restoreTerminalState()
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handleCS: (term) ->
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switch term
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when "@"
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@buffer.insertCharacters @n
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when "A"
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@buffer.priorRow @n
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when "B"
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@buffer.nextRow @n
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when "C"
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@buffer.nextColumn @n
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when "D"
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@buffer.priorColumn @n
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when "E"
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@buffer.nextRowFirstColumn @n
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when "F"
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@buffer.priorRowFirstColumn @n
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when "G"
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@buffer.goToColumn @n
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when "H"
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@buffer.goToRowAndColumn @n, @m
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when "I"
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@buffer.goToNextHorizontalTabStop @n
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when "J"
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if @n is 2
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@buffer.eraseScreen()
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else if @n is 1
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@buffer.eraseFromScreenStart()
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else
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@buffer.eraseToScreenEnd()
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when "K"
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if @n is 2
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@buffer.eraseRow()
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else if @n is 1
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@buffer.eraseFromRowStart()
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else
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@buffer.eraseToRowEnd()
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when "L"
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@buffer.insertLine @n or 1
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when "M"
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@buffer.deleteLine @n or 1
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when "P" # DCH - Delete Character, from current position to end of field
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@buffer.deleteCharacters @n or 1
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when "S"
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@buffer.scrollUp @n
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when "T"
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@buffer.scrollDown @n
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when "X"
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@buffer.eraseCharacters @n
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when "Z"
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@buffer.goToPriorHorizontalTabStop @n
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when "b"
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@buffer.repeatLastCharacter @n
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when "d" # VPA - Vertical Position Absolute
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@buffer.goToRow @n
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when "f"
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@buffer.goToRowAndColumn @n, @m
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when "g"
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if !@n or @n is 0
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@buffer.clearHorizontalTabStop()
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else if @n is 3
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@buffer.clearAllHorizontalTabStops()
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when "l" # l, Reset mode
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console.log "(TODO) reset: " + @n
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when "m"
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@handleSGR @params
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when "n"
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@reportRowAndColumn()
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when "r" # Set top and bottom margins (scroll region on VT100)
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@setScrollRegion @n or 0, @m or @lines - 1
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when "^"
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# reserved
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# Privacy Message (password verification), terminated by ST
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# TODO
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else
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throw "no handler for CSI term: " + term
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handleSGR: (numbers) ->
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numbers = [0] if numbers.length is 0
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i = 0
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while i < numbers.length
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n = numbers[i]
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if n is 0
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@fg = @bg = undefined
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@bright = false
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@underline = false
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# TODO: reset blink (and others?)
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else if n is 1
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@bright = true
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else if n is 3
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@italic = true
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else if n is 4
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@underline = true
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else if n is 5
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@blink = true
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else if n is 23
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@italic = false
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else if n is 24
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@underline = false
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else if n is 25
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@blink = false
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else if n >= 30 and n <= 37
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@fg = n - 30
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else if n is 38
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@fg = numbers[i + 2]
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i += 2
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else if n is 39
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@fg = undefined
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else if n >= 40 and n <= 47
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@bg = n - 40
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else if n is 48
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@bg = numbers[i + 2]
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i += 2
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else if n is 49
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@bg = undefined
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i++
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props = {}
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props.fg = @fg if @fg isnt undefined
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props.bg = @bg if @bg isnt undefined
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props.bright = true if @bright
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props.underline = true if @underline
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props.italic = true if @italic
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props.blink = true if @blink
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@buffer.setBrush AsciiIo.Brush.create(props)
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bell: ->
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@renderer.visualBell()
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# @trigger('bell')
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compilePatterns: ->
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@COMPILED_PATTERNS = ([new RegExp("^" + re), f] for re, f of @PATTERNS)
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feed: (data) ->
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@data += data
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while @data.length > 0
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match = null
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for pattern in @COMPILED_PATTERNS
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match = pattern[0].exec(@data)
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if match
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handler = pattern[1]
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handler.call(this, @data, match)
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@data = @data.slice(match[0].length)
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break
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break unless match
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@render()
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@data.length is 0
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render: ->
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@renderer.render(@buffer.changes(), @buffer.cursorX, @buffer.cursorY)
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@buffer.clearChanges()
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# ==== Screen buffer operations
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clearScreen: ->
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@buffer.clear()
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switchToNormalBuffer: ->
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@buffer = @normalBuffer
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@updateScreen()
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switchToAlternateBuffer: ->
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@alternateBuffer.setBrush(@normalBuffer.getBrush())
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@buffer = @alternateBuffer
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@updateScreen()
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updateScreen: ->
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@buffer.updateScreen()
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carriageReturn: ->
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@buffer.goToFirstColumn()
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backspace: ->
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@buffer.priorColumn()
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# === ANSI handlers
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# ------ Cursor control
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showCursor: ->
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@renderer.showCursor true
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hideCursor: ->
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@renderer.showCursor false
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# ----- Scroll control
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reverseIndex: ->
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@goToPriorRow()
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lineFeed: ->
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@buffer.goToNextRow()
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verticalTab: ->
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@goToNextRow()
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formFeed: ->
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@buffer.goToNextRow()
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index: ->
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@buffer.goToNextRow()
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newLine: ->
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@buffer.goToNextRowFirstColumn()
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# === Commands
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# ----- Scroll control
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setScrollRegion: (top, bottom) ->
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@scrollRegion.setTop(top - 1)
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@scrollRegion.setBottom(bottom - 1)
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setHorizontalTabStop: ->
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@tabStops.add(@cursorX)
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# ----- Terminal control
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resetTerminal: ->
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@scrollRegion = new AsciiIo.ScrollRegion(0, @lines - 1)
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@tabStops = new AsciiIo.TabStops(@cols)
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@normalBuffer = new AsciiIo.ScreenBuffer(@cols, @lines, @scrollRegion, @tabStops)
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@alternateBuffer = new AsciiIo.ScreenBuffer(@cols, @lines, @scrollRegion, @tabStops)
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@buffer = @normalBuffer
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@updateScreen()
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saveTerminalState: ->
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@saveCursor()
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@scrollRegion.save()
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@saveBrush()
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restoreTerminalState: ->
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@restoreBrush()
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@scrollRegion.restore()
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@restoreCursor()
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reportRowAndColumn: ->
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# http://www.shaels.net/index.php/propterm/documents
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