Xpra.coffee

class Xpra extends EventEmitter

  constructor: (host, port) ->
    @ws = new Websock

    @ws.on 'open', (data) =>
      @handlers = new XpraHandlers @
      @proto = new Protocole @ws, @handlers
      @keyboard = new Keyboard @

      @_SendHello()

    @ws.on 'close', (data) ->
      console.log 'close', data

    @ws.on 'error', (data) ->
      console.log 'err', data

    @ws.open 'ws://' + host + ':' + port + '/', ['binary']

  #FIXME: to move into a whole new class for better clarity
  _SendHello: ->
    screen_width = document.body.scrollWidth
    screen_height = document.body.scrollHeight

    get_desktop_size = ->
      [
        screen_width
        screen_height
      ]

    get_screen_sizes = ->
      dpi = 96

      ###
      equivallent GTK code:
      monitor = plug_name, geom.x, geom.y, geom.width, geom.height, wmm, hmm
      monitors.append(monitor)

      screen = (screen.make_display_name(), screen.get_width(), screen.get_height(),
          screen.get_width_mm(), screen.get_height_mm(),
          monitors,
          work_x, work_y, work_width, work_height)
      ###

      wmm = Math.round(screen_width * 25.4 / dpi)
      hmm = Math.round(screen_height * 25.4 / dpi)
      monitor = [
        'Canvas'
        0
        0
        screen_width
        screen_height
        wmm
        hmm
      ]
      screen = [
        'HTML'
        screen_width
        screen_height
        wmm
        hmm
        [ monitor ]
        0
        0
        screen_width
        screen_height
      ]
      #just a single screen:
      [ screen ]

    get_keycodes = ->
      #keycodes.append((nn(keyval), nn(name), nn(keycode), nn(group), nn(level)))
      keycodes = []
      kc = undefined
      for keycode of CHARCODE_TO_NAME
        kc = parseInt(keycode)
        keycodes.push [
          kc
          CHARCODE_TO_NAME[keycode]
          kc
          0
          0
        ]
      #show("keycodes="+keycodes.toSource());
      keycodes

    get_keyboard_layout = ->
      v = window.navigator.userLanguage || window.navigator.language
      v = v.split(",")[0]
      l = v.split("-", 2)
      if l.length is 1
        l = v.split("_", 2)
      if l.length is 1
        return ""

      return l[1].toLowerCase()

    @proto.Send 'hello',
      "version"         : "0.15.0",
      "platform"          : "linux2"
      "platform.name"       : "Linux"
      "platform.processor"    : "unknown"
      "platform.platform"     : navigator.appVersion
      "namespace"         : true
      "client_type"         : "HTML5"
      "share"           : false
      "auto_refresh_delay"    : 500
      "randr_notify"        : true
      "sound.server_driven"   : true
      "generic_window_types"    : true
      "server-window-resize"    : true
      "notify-startup-complete" : true
      "generic-rgb-encodings"   : true
      "window.raise"        : true
      "encodings"         : ["rgb"]
      "raw_window_icons"      : true
      #rgb24 is not efficient in HTML so don't use it:
      #png and jpeg will need extra code
      #"encodings.core"      : ["rgb24", "rgb32", "png", "jpeg"]
      "encodings.core"      : ["rgb32"]
      "encodings.rgb_formats"   : ["RGBX", "RGBA"]
      "encoding.generic"        : true
      "encoding.transparency"   : true
      "encoding.client_options" : true
      "encoding.csc_atoms"    : true
      "encoding.uses_swscale"   : false
      #video stuff we may handle later:
      "encoding.video_reinit"   : false
      "encoding.video_scaling"  : false
      "encoding.csc_modes"    : []
      #sound (not yet):
      "sound.receive"       : false
      "sound.send"        : false
      #compression bits:
      "zlib"            : true
      "lz4"           : false
      "compression_level"     : 0
      "compressible_cursors"    : true
      "encoding.rgb24zlib"    : true
      "encoding.rgb_zlib"     : true
      "encoding.rgb_lz4"      : false
      "bencode": true
      "windows"         : true
      #partial support:
      "keyboard"          : true
      "xkbmap_layout"       : get_keyboard_layout()
      "xkbmap_keycodes"     : get_keycodes()
      "desktop_size"        : get_desktop_size()
      "screen_sizes"        : get_screen_sizes()
      "dpi"           : 96
      #not handled yet, but we will:
      "clipboard_enabled"     : false
      "notifications"       : true
      "cursors"         : true
      "bell"            : true
      "system_tray"       : true
      #we cannot handle this (GTK only):
      "named_cursors"       : false