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path: root/js/lex.js
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function Lex (x,y) {
  if (typeof x == "number") {
    this.y = y
    this.x = x
    this.span = document.createElement("span")
  }
  else {
    this.span = x
  }
  this.fg = colors.white
  this.bg = colors.black
  this.char = " "
  this.opacity = 1
  this.focused = false
}
Lex.prototype.build = function(){
  this.span.className = this.css()
  this.span.innerHTML = this.html()
}
Lex.prototype.css = function(){
   return (
    this.focused ?
      "focused " : ""
  ) + (
    this.opacity === 0 ?
      "transparent f" + color_alphabet[mod(this.fg,16)] :
      "f" + color_alphabet[mod(this.fg,16)] + "b" + color_alphabet[mod(this.bg,16)]
  )
}
Lex.prototype.html = function(){
  return this.char == " " ? " " : this.char || " "
}
Lex.prototype.read = function(){
  this.char = this.span.innerHTML
  return this.char
}
Lex.prototype.ascii = function(){
  return this.char || " "
}
Lex.prototype.sanitize = function(){
  switch (this.char) {
//    case "%": return "%"
    case undefined:
    case "":  return " "
    default:  return this.char
  }
}
var fgOnly = false
Lex.prototype.mirc = function(){
  var char = this.char || " "
  if (fgOnly) {
    return "\x03" + (this.fg&15) + char
  }
  if ((this.bg&15) < 10 && ! isNaN(parseInt(char))) {
    return "\x03" + (this.fg&15) + ",0" + (this.bg&15) + char
  }
  else {
    return "\x03" + (this.fg&15) + "," + (this.bg&15) + char
  }
}
Lex.prototype.assign = function (lex){
  this.fg = lex.fg
  this.bg = lex.bg
  this.char = lex.char
  this.opacity = lex.opacity
  this.build()
}
Lex.prototype.paint = function (lex){
  if (lex.opacity == 0) return
  if (brush.draw_fg) this.fg = lex.fg
  if (brush.draw_bg) this.bg = lex.bg
  if (brush.draw_char) this.char = lex.char
  this.opacity = 1
  this.build()
}
Lex.prototype.clone = function () {
  var lex = new Lex (0,0)
  lex.assign(this)
  return lex
}
Lex.prototype.erase = function (){
  this.fg = fillColor
  this.bg = fillColor
  this.char = " "
  this.opacity = 1
  this.build()
}
Lex.prototype.fill = function(lex){
  this.fg = lex.fg
  this.bg = lex.bg
  this.char = lex.char
  this.opacity = lex.opacity
  this.build()
}
Lex.prototype.eq = function(lex){
  return lex && this.fg == lex.fg && this.bg == lex.bg && this.char == lex.char
}
Lex.prototype.eqColor = function(lex){
  return lex && this.fg == lex.fg && this.bg == lex.bg
}
Lex.prototype.ne = function(lex){
  return ! this.eq(lex)
}
Lex.prototype.clear = function(){
  this.bg = colors.black
  this.fg = 0
  this.char = " "
  this.opacity = 0
  this.build()
}
Lex.prototype.isClear = function(){
  return this.bg == 1 && this.fg == 0 && this.char == " "
}
Lex.prototype.focus = function(){
  if (focused) focused.blur()
  this.span.classList.add('focused')
  this.focused = true
  focused = this
}
Lex.prototype.blur = function(){
  this.span.classList.remove('focused')
  this.focused = false
  focused = null
  this.onBlur && this.onBlur()
}
Lex.prototype.demolish = function(){
  if (this.span.parentNode) { this.span.parentNode.removeChild(this.span) }
  this.span = null
}
Lex.prototype.key = function(char, keyCode) {
  if (! char) { return }
  this.char = char
  this.fg = brush.fg
  this.build()
  return true
}