diff options
| -rw-r--r-- | js/ansi/ansi.js | 405 | ||||
| -rw-r--r-- | js/ansi/newlines.js | 71 | ||||
| -rwxr-xr-x | js/test.js | 22 |
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') - } -} @@ -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(); |