Removed ansi from js source tree.

Test suite will now use ansi if the package is installed,
otherwise skip it.

3 files changed, 20 insertions, 478 deletions

diff --git a/js/ansi/ansi.js b/js/ansi/ansi.js
deleted file mode 100644
index 52fc8ec..0000000
--- a/js/ansi/ansi.js
+++ /dev/null
@@ -1,405 +0,0 @@
-
-/**
- * References:
- *
- *   - http://en.wikipedia.org/wiki/ANSI_escape_code
- *   - http://www.termsys.demon.co.uk/vtansi.htm
- *
- */
-
-/**
- * Module dependencies.
- */
-
-var emitNewlineEvents = require('./newlines')
-  , prefix = '\x1b[' // For all escape codes
-  , suffix = 'm'     // Only for color codes
-
-/**
- * The ANSI escape sequences.
- */
-
-var codes = {
-    up: 'A'
-  , down: 'B'
-  , forward: 'C'
-  , back: 'D'
-  , nextLine: 'E'
-  , previousLine: 'F'
-  , horizontalAbsolute: 'G'
-  , eraseData: 'J'
-  , eraseLine: 'K'
-  , scrollUp: 'S'
-  , scrollDown: 'T'
-  , savePosition: 's'
-  , restorePosition: 'u'
-  , queryPosition: '6n'
-  , hide: '?25l'
-  , show: '?25h'
-}
-
-/**
- * Rendering ANSI codes.
- */
-
-var styles = {
-    bold: 1
-  , italic: 3
-  , underline: 4
-  , inverse: 7
-}
-
-/**
- * The negating ANSI code for the rendering modes.
- */
-
-var reset = {
-    bold: 22
-  , italic: 23
-  , underline: 24
-  , inverse: 27
-}
-
-/**
- * The standard, styleable ANSI colors.
- */
-
-var colors = {
-    white: 37
-  , black: 30
-  , blue: 34
-  , cyan: 36
-  , green: 32
-  , magenta: 35
-  , red: 31
-  , yellow: 33
-  , grey: 90
-  , brightBlack: 90
-  , brightRed: 91
-  , brightGreen: 92
-  , brightYellow: 93
-  , brightBlue: 94
-  , brightMagenta: 95
-  , brightCyan: 96
-  , brightWhite: 97
-}
-
-
-/**
- * Creates a Cursor instance based off the given `writable stream` instance.
- */
-
-function ansi (stream, options) {
-  if (stream._ansicursor) {
-    return stream._ansicursor
-  } else {
-    return stream._ansicursor = new Cursor(stream, options)
-  }
-}
-module.exports = exports = ansi
-
-/**
- * The `Cursor` class.
- */
-
-function Cursor (stream, options) {
-  if (!(this instanceof Cursor)) {
-    return new Cursor(stream, options)
-  }
-  if (typeof stream != 'object' || typeof stream.write != 'function') {
-    throw new Error('a valid Stream instance must be passed in')
-  }
-
-  // the stream to use
-  this.stream = stream
-
-  // when 'enabled' is false then all the functions are no-ops except for write()
-  this.enabled = options && options.enabled
-  if (typeof this.enabled === 'undefined') {
-    this.enabled = stream.isTTY
-  }
-  this.enabled = !!this.enabled
-
-  // then `buffering` is true, then `write()` calls are buffered in
-  // memory until `flush()` is invoked
-  this.buffering = !!(options && options.buffering)
-  this._buffer = []
-
-  // controls the foreground and background colors
-  this.fg = this.foreground = new Colorer(this, 0)
-  this.bg = this.background = new Colorer(this, 10)
-
-  // defaults
-  this.Bold = false
-  this.Italic = false
-  this.Underline = false
-  this.Inverse = false
-
-  // keep track of the number of "newlines" that get encountered
-  this.newlines = 0
-  emitNewlineEvents(stream)
-  stream.on('newline', function () {
-    this.newlines++
-  }.bind(this))
-}
-exports.Cursor = Cursor
-
-/**
- * Helper function that calls `write()` on the underlying Stream.
- * Returns `this` instead of the write() return value to keep
- * the chaining going.
- */
-
-Cursor.prototype.write = function (data) {
-  if (this.buffering) {
-    this._buffer.push(arguments)
-  } else {
-    this.stream.write.apply(this.stream, arguments)
-  }
-  return this
-}
-
-/**
- * Buffer `write()` calls into memory.
- *
- * @api public
- */
-
-Cursor.prototype.buffer = function () {
-  this.buffering = true
-  return this
-}
-
-/**
- * Write out the in-memory buffer.
- *
- * @api public
- */
-
-Cursor.prototype.flush = function () {
-  this.buffering = false
-  var str = this._buffer.map(function (args) {
-    if (args.length != 1) throw new Error('unexpected args length! ' + args.length);
-    return args[0];
-  }).join('');
-  this._buffer.splice(0); // empty
-  this.write(str);
-  return this
-}
-
-
-/**
- * The `Colorer` class manages both the background and foreground colors.
- */
-
-function Colorer (cursor, base) {
-  this.current = null
-  this.cursor = cursor
-  this.base = base
-}
-exports.Colorer = Colorer
-
-/**
- * Write an ANSI color code, ensuring that the same code doesn't get rewritten.
- */
-
-Colorer.prototype._setColorCode = function setColorCode (code) {
-  var c = String(code)
-  if (this.current === c) return
-  this.cursor.enabled && this.cursor.write(prefix + c + suffix)
-  this.current = c
-  return this
-}
-
-
-/**
- * Set up the positional ANSI codes.
- */
-
-Object.keys(codes).forEach(function (name) {
-  var code = String(codes[name])
-  Cursor.prototype[name] = function () {
-    var c = code
-    if (arguments.length > 0) {
-      c = toArray(arguments).map(Math.round).join(';') + code
-    }
-    this.enabled && this.write(prefix + c)
-    return this
-  }
-})
-
-/**
- * Set up the functions for the rendering ANSI codes.
- */
-
-Object.keys(styles).forEach(function (style) {
-  var name = style[0].toUpperCase() + style.substring(1)
-    , c = styles[style]
-    , r = reset[style]
-
-  Cursor.prototype[style] = function () {
-    if (this[name]) return
-    this.enabled && this.write(prefix + c + suffix)
-    this[name] = true
-    return this
-  }
-
-  Cursor.prototype['reset' + name] = function () {
-    if (!this[name]) return
-    this.enabled && this.write(prefix + r + suffix)
-    this[name] = false
-    return this
-  }
-})
-
-/**
- * Setup the functions for the standard colors.
- */
-
-Object.keys(colors).forEach(function (color) {
-  var code = colors[color]
-
-  Colorer.prototype[color] = function () {
-    this._setColorCode(this.base + code)
-    return this.cursor
-  }
-
-  Cursor.prototype[color] = function () {
-    return this.foreground[color]()
-  }
-})
-
-/**
- * Makes a beep sound!
- */
-
-Cursor.prototype.beep = function () {
-  this.enabled && this.write('\x07')
-  return this
-}
-
-/**
- * Moves cursor to specific position
- */
-
-Cursor.prototype.goto = function (x, y) {
-  x = x | 0
-  y = y | 0
-  this.enabled && this.write(prefix + y + ';' + x + 'H')
-  return this
-}
-
-/**
- * Resets the color.
- */
-
-Colorer.prototype.reset = function () {
-  this._setColorCode(this.base + 39)
-  return this.cursor
-}
-
-/**
- * Resets all ANSI formatting on the stream.
- */
-
-Cursor.prototype.reset = function () {
-  this.enabled && this.write(prefix + '0' + suffix)
-  this.Bold = false
-  this.Italic = false
-  this.Underline = false
-  this.Inverse = false
-  this.foreground.current = null
-  this.background.current = null
-  return this
-}
-
-/**
- * Sets the foreground color with the given RGB values.
- * The closest match out of the 216 colors is picked.
- */
-
-Colorer.prototype.rgb = function (r, g, b) {
-  var base = this.base + 38
-    , code = rgb(r, g, b)
-  this._setColorCode(base + ';5;' + code)
-  return this.cursor
-}
-
-/**
- * Same as `cursor.fg.rgb(r, g, b)`.
- */
-
-Cursor.prototype.rgb = function (r, g, b) {
-  return this.foreground.rgb(r, g, b)
-}
-
-/**
- * Accepts CSS color codes for use with ANSI escape codes.
- * For example: `#FF000` would be bright red.
- */
-
-Colorer.prototype.hex = function (color) {
-  return this.rgb.apply(this, hex(color))
-}
-
-/**
- * Same as `cursor.fg.hex(color)`.
- */
-
-Cursor.prototype.hex = function (color) {
-  return this.foreground.hex(color)
-}
-
-
-// UTIL FUNCTIONS //
-
-/**
- * Translates a 255 RGB value to a 0-5 ANSI RGV value,
- * then returns the single ANSI color code to use.
- */
-
-function rgb (r, g, b) {
-  var red = r / 255 * 5
-    , green = g / 255 * 5
-    , blue = b / 255 * 5
-  return rgb5(red, green, blue)
-}
-
-/**
- * Turns rgb 0-5 values into a single ANSI color code to use.
- */
-
-function rgb5 (r, g, b) {
-  var red = Math.round(r)
-    , green = Math.round(g)
-    , blue = Math.round(b)
-  return 16 + (red*36) + (green*6) + blue
-}
-
-/**
- * Accepts a hex CSS color code string (# is optional) and
- * translates it into an Array of 3 RGB 0-255 values, which
- * can then be used with rgb().
- */
-
-function hex (color) {
-  var c = color[0] === '#' ? color.substring(1) : color
-    , r = c.substring(0, 2)
-    , g = c.substring(2, 4)
-    , b = c.substring(4, 6)
-  return [parseInt(r, 16), parseInt(g, 16), parseInt(b, 16)]
-}
-
-/**
- * Turns an array-like object into a real array.
- */
-
-function toArray (a) {
-  var i = 0
-    , l = a.length
-    , rtn = []
-  for (; i<l; i++) {
-    rtn.push(a[i])
-  }
-  return rtn
-}
diff --git a/js/ansi/newlines.js b/js/ansi/newlines.js
deleted file mode 100644
index 4e37a0a..0000000
--- a/js/ansi/newlines.js
+++ /dev/null
@@ -1,71 +0,0 @@
-
-/**
- * Accepts any node Stream instance and hijacks its "write()" function,
- * so that it can count any newlines that get written to the output.
- *
- * When a '\n' byte is encountered, then a "newline" event will be emitted
- * on the stream, with no arguments. It is up to the listeners to determine
- * any necessary deltas required for their use-case.
- *
- * Ex:
- *
- *   var cursor = ansi(process.stdout)
- *     , ln = 0
- *   process.stdout.on('newline', function () {
- *    ln++
- *   })
- */
-
-/**
- * Module dependencies.
- */
-
-var assert = require('assert')
-var NEWLINE = '\n'.charCodeAt(0)
-
-function emitNewlineEvents (stream) {
-  if (stream._emittingNewlines) {
-    // already emitting newline events
-    return
-  }
-
-  var write = stream.write
-
-  stream.write = function (data) {
-    // first write the data
-    var rtn = write.apply(stream, arguments)
-
-    if (stream.listeners('newline').length > 0) {
-      var len = data.length
-        , i = 0
-      // now try to calculate any deltas
-      if (typeof data == 'string') {
-        for (; i<len; i++) {
-          processByte(stream, data.charCodeAt(i))
-        }
-      } else {
-        // buffer
-        for (; i<len; i++) {
-          processByte(stream, data[i])
-        }
-      }
-    }
-
-    return rtn
-  }
-
-  stream._emittingNewlines = true
-}
-module.exports = emitNewlineEvents
-
-
-/**
- * Processes an individual byte being written to a stream
- */
-
-function processByte (stream, b) {
-  assert.equal(typeof b, 'number')
-  if (b === NEWLINE) {
-    stream.emit('newline')
-  }
-}
diff --git a/js/test.js b/js/test.js
index 6cb7c98..a6184b3 100755
--- a/js/test.js
+++ b/js/test.js
@@ -3,8 +3,26 @@
 
 var fs = require('fs');
 var commonmark = require('./lib/index.js');
-var ansi = require('./ansi/ansi');
-var cursor = ansi(process.stdout);
+var ansi;
+var cursor;
+
+try {
+  ansi = require('ansi');
+  cursor = ansi(process.stdout);
+}
+catch(err) {
+  var noOp = function() { return this; };
+  cursor = {
+        write: function (s) {
+            process.stdout.write(s);
+            return this;
+        },
+        green: noOp,
+        red: noOp,
+        cyan: noOp,
+        reset: noOp,
+  };
+}
 
 var writer = new commonmark.HtmlRenderer();
 var reader = new commonmark.DocParser();