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<!doctype html>
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<title>CodeMirror: CoffeeScript mode</title>
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<meta charset="utf-8"/>
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<link rel=stylesheet href="../../doc/docs.css">
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<link rel="stylesheet" href="../../lib/codemirror.css">
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<script src="../../lib/codemirror.js"></script>
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<script src="coffeescript.js"></script>
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<style>.CodeMirror {border-top: 1px solid silver; border-bottom: 1px solid silver;}</style>
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<div id=nav>
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<a href="http://codemirror.net"><h1>CodeMirror</h1><img id=logo src="../../doc/logo.png"></a>
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<ul>
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<li><a href="../../index.html">Home</a>
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<li><a href="../../doc/manual.html">Manual</a>
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<li><a href="https://github.com/codemirror/codemirror">Code</a>
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</ul>
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<ul>
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<li><a href="../index.html">Language modes</a>
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<li><a class=active href="#">CoffeeScript</a>
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</ul>
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</div>
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<article>
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<h2>CoffeeScript mode</h2>
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<form><textarea id="code" name="code">
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# CoffeeScript mode for CodeMirror
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# Copyright (c) 2011 Jeff Pickhardt, released under
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# the MIT License.
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#
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# Modified from the Python CodeMirror mode, which also is
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# under the MIT License Copyright (c) 2010 Timothy Farrell.
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#
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# The following script, Underscore.coffee, is used to
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# demonstrate CoffeeScript mode for CodeMirror.
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#
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# To download CoffeeScript mode for CodeMirror, go to:
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# https://github.com/pickhardt/coffeescript-codemirror-mode
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# **Underscore.coffee
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# (c) 2011 Jeremy Ashkenas, DocumentCloud Inc.**
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# Underscore is freely distributable under the terms of the
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# [MIT license](http://en.wikipedia.org/wiki/MIT_License).
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# Portions of Underscore are inspired by or borrowed from
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# [Prototype.js](http://prototypejs.org/api), Oliver Steele's
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# [Functional](http://osteele.com), and John Resig's
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# [Micro-Templating](http://ejohn.org).
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# For all details and documentation:
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# http://documentcloud.github.com/underscore/
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# Baseline setup
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# --------------
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# Establish the root object, `window` in the browser, or `global` on the server.
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root = this
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# Save the previous value of the `_` variable.
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previousUnderscore = root._
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### Multiline
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comment
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###
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# Establish the object that gets thrown to break out of a loop iteration.
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# `StopIteration` is SOP on Mozilla.
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breaker = if typeof(StopIteration) is 'undefined' then '__break__' else StopIteration
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#### Docco style single line comment (title)
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# Helper function to escape **RegExp** contents, because JS doesn't have one.
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escapeRegExp = (string) -> string.replace(/([.*+?^${}()|[\]\/\\])/g, '\\$1')
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# Save bytes in the minified (but not gzipped) version:
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ArrayProto = Array.prototype
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ObjProto = Object.prototype
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# Create quick reference variables for speed access to core prototypes.
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slice = ArrayProto.slice
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unshift = ArrayProto.unshift
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toString = ObjProto.toString
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hasOwnProperty = ObjProto.hasOwnProperty
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propertyIsEnumerable = ObjProto.propertyIsEnumerable
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# All **ECMA5** native implementations we hope to use are declared here.
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nativeForEach = ArrayProto.forEach
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nativeMap = ArrayProto.map
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nativeReduce = ArrayProto.reduce
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nativeReduceRight = ArrayProto.reduceRight
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nativeFilter = ArrayProto.filter
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nativeEvery = ArrayProto.every
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nativeSome = ArrayProto.some
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nativeIndexOf = ArrayProto.indexOf
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nativeLastIndexOf = ArrayProto.lastIndexOf
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nativeIsArray = Array.isArray
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nativeKeys = Object.keys
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# Create a safe reference to the Underscore object for use below.
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_ = (obj) -> new wrapper(obj)
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# Export the Underscore object for **CommonJS**.
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if typeof(exports) != 'undefined' then exports._ = _
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# Export Underscore to global scope.
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root._ = _
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# Current version.
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_.VERSION = '1.1.0'
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# Collection Functions
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# --------------------
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# The cornerstone, an **each** implementation.
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# Handles objects implementing **forEach**, arrays, and raw objects.
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_.each = (obj, iterator, context) ->
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try
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if nativeForEach and obj.forEach is nativeForEach
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obj.forEach iterator, context
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else if _.isNumber obj.length
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iterator.call context, obj[i], i, obj for i in [0...obj.length]
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else
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iterator.call context, val, key, obj for own key, val of obj
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catch e
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throw e if e isnt breaker
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obj
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# Return the results of applying the iterator to each element. Use JavaScript
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# 1.6's version of **map**, if possible.
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_.map = (obj, iterator, context) ->
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return obj.map(iterator, context) if nativeMap and obj.map is nativeMap
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results = []
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_.each obj, (value, index, list) ->
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results.push iterator.call context, value, index, list
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results
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# **Reduce** builds up a single result from a list of values. Also known as
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# **inject**, or **foldl**. Uses JavaScript 1.8's version of **reduce**, if possible.
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_.reduce = (obj, iterator, memo, context) ->
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if nativeReduce and obj.reduce is nativeReduce
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iterator = _.bind iterator, context if context
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return obj.reduce iterator, memo
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_.each obj, (value, index, list) ->
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memo = iterator.call context, memo, value, index, list
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memo
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# The right-associative version of **reduce**, also known as **foldr**. Uses
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# JavaScript 1.8's version of **reduceRight**, if available.
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_.reduceRight = (obj, iterator, memo, context) ->
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if nativeReduceRight and obj.reduceRight is nativeReduceRight
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iterator = _.bind iterator, context if context
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return obj.reduceRight iterator, memo
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reversed = _.clone(_.toArray(obj)).reverse()
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_.reduce reversed, iterator, memo, context
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# Return the first value which passes a truth test.
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_.detect = (obj, iterator, context) ->
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result = null
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_.each obj, (value, index, list) ->
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if iterator.call context, value, index, list
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result = value
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_.breakLoop()
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result
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# Return all the elements that pass a truth test. Use JavaScript 1.6's
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# **filter**, if it exists.
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_.filter = (obj, iterator, context) ->
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return obj.filter iterator, context if nativeFilter and obj.filter is nativeFilter
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results = []
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_.each obj, (value, index, list) ->
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results.push value if iterator.call context, value, index, list
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results
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# Return all the elements for which a truth test fails.
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_.reject = (obj, iterator, context) ->
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results = []
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_.each obj, (value, index, list) ->
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results.push value if not iterator.call context, value, index, list
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results
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# Determine whether all of the elements match a truth test. Delegate to
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# JavaScript 1.6's **every**, if it is present.
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_.every = (obj, iterator, context) ->
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iterator ||= _.identity
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return obj.every iterator, context if nativeEvery and obj.every is nativeEvery
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result = true
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_.each obj, (value, index, list) ->
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_.breakLoop() unless (result = result and iterator.call(context, value, index, list))
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result
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# Determine if at least one element in the object matches a truth test. Use
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# JavaScript 1.6's **some**, if it exists.
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_.some = (obj, iterator, context) ->
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iterator ||= _.identity
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return obj.some iterator, context if nativeSome and obj.some is nativeSome
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result = false
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_.each obj, (value, index, list) ->
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_.breakLoop() if (result = iterator.call(context, value, index, list))
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result
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# Determine if a given value is included in the array or object,
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# based on `===`.
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_.include = (obj, target) ->
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return _.indexOf(obj, target) isnt -1 if nativeIndexOf and obj.indexOf is nativeIndexOf
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return true for own key, val of obj when val is target
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false
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# Invoke a method with arguments on every item in a collection.
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_.invoke = (obj, method) ->
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args = _.rest arguments, 2
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(if method then val[method] else val).apply(val, args) for val in obj
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# Convenience version of a common use case of **map**: fetching a property.
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_.pluck = (obj, key) ->
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_.map(obj, (val) -> val[key])
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# Return the maximum item or (item-based computation).
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_.max = (obj, iterator, context) ->
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return Math.max.apply(Math, obj) if not iterator and _.isArray(obj)
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result = computed: -Infinity
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_.each obj, (value, index, list) ->
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computed = if iterator then iterator.call(context, value, index, list) else value
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computed >= result.computed and (result = {value: value, computed: computed})
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result.value
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# Return the minimum element (or element-based computation).
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_.min = (obj, iterator, context) ->
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return Math.min.apply(Math, obj) if not iterator and _.isArray(obj)
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result = computed: Infinity
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_.each obj, (value, index, list) ->
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computed = if iterator then iterator.call(context, value, index, list) else value
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computed < result.computed and (result = {value: value, computed: computed})
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result.value
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# Sort the object's values by a criterion produced by an iterator.
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_.sortBy = (obj, iterator, context) ->
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_.pluck(((_.map obj, (value, index, list) ->
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{value: value, criteria: iterator.call(context, value, index, list)}
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).sort((left, right) ->
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a = left.criteria; b = right.criteria
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if a < b then -1 else if a > b then 1 else 0
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)), 'value')
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# Use a comparator function to figure out at what index an object should
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# be inserted so as to maintain order. Uses binary search.
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_.sortedIndex = (array, obj, iterator) ->
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iterator ||= _.identity
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low = 0
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high = array.length
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while low < high
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mid = (low + high) >> 1
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if iterator(array[mid]) < iterator(obj) then low = mid + 1 else high = mid
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low
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# Convert anything iterable into a real, live array.
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_.toArray = (iterable) ->
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return [] if (!iterable)
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return iterable.toArray() if (iterable.toArray)
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return iterable if (_.isArray(iterable))
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return slice.call(iterable) if (_.isArguments(iterable))
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_.values(iterable)
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# Return the number of elements in an object.
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_.size = (obj) -> _.toArray(obj).length
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# Array Functions
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# ---------------
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# Get the first element of an array. Passing `n` will return the first N
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# values in the array. Aliased as **head**. The `guard` check allows it to work
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# with **map**.
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_.first = (array, n, guard) ->
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if n and not guard then slice.call(array, 0, n) else array[0]
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# Returns everything but the first entry of the array. Aliased as **tail**.
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# Especially useful on the arguments object. Passing an `index` will return
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# the rest of the values in the array from that index onward. The `guard`
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# check allows it to work with **map**.
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_.rest = (array, index, guard) ->
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slice.call(array, if _.isUndefined(index) or guard then 1 else index)
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# Get the last element of an array.
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_.last = (array) -> array[array.length - 1]
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# Trim out all falsy values from an array.
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_.compact = (array) -> item for item in array when item
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# Return a completely flattened version of an array.
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_.flatten = (array) ->
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_.reduce array, (memo, value) ->
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return memo.concat(_.flatten(value)) if _.isArray value
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memo.push value
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memo
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, []
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# Return a version of the array that does not contain the specified value(s).
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_.without = (array) ->
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values = _.rest arguments
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val for val in _.toArray(array) when not _.include values, val
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# Produce a duplicate-free version of the array. If the array has already
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# been sorted, you have the option of using a faster algorithm.
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_.uniq = (array, isSorted) ->
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memo = []
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for el, i in _.toArray array
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memo.push el if i is 0 || (if isSorted is true then _.last(memo) isnt el else not _.include(memo, el))
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memo
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# Produce an array that contains every item shared between all the
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# passed-in arrays.
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_.intersect = (array) ->
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rest = _.rest arguments
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_.select _.uniq(array), (item) ->
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_.all rest, (other) ->
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_.indexOf(other, item) >= 0
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# Zip together multiple lists into a single array -- elements that share
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# an index go together.
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_.zip = ->
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length = _.max _.pluck arguments, 'length'
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results = new Array length
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for i in [0...length]
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results[i] = _.pluck arguments, String i
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results
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# If the browser doesn't supply us with **indexOf** (I'm looking at you, MSIE),
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# we need this function. Return the position of the first occurrence of an
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# item in an array, or -1 if the item is not included in the array.
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_.indexOf = (array, item) ->
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return array.indexOf item if nativeIndexOf and array.indexOf is nativeIndexOf
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i = 0; l = array.length
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while l - i
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if array[i] is item then return i else i++
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-1
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# Provide JavaScript 1.6's **lastIndexOf**, delegating to the native function,
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# if possible.
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_.lastIndexOf = (array, item) ->
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return array.lastIndexOf(item) if nativeLastIndexOf and array.lastIndexOf is nativeLastIndexOf
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i = array.length
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while i
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if array[i] is item then return i else i--
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-1
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# Generate an integer Array containing an arithmetic progression. A port of
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# [the native Python **range** function](http://docs.python.org/library/functions.html#range).
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_.range = (start, stop, step) ->
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a = arguments
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solo = a.length <= 1
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i = start = if solo then 0 else a[0]
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stop = if solo then a[0] else a[1]
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step = a[2] or 1
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len = Math.ceil((stop - start) / step)
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return [] if len <= 0
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range = new Array len
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idx = 0
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loop
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return range if (if step > 0 then i - stop else stop - i) >= 0
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range[idx] = i
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idx++
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i+= step
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# Function Functions
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# ------------------
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# Create a function bound to a given object (assigning `this`, and arguments,
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# optionally). Binding with arguments is also known as **curry**.
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_.bind = (func, obj) ->
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args = _.rest arguments, 2
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-> func.apply obj or root, args.concat arguments
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# Bind all of an object's methods to that object. Useful for ensuring that
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# all callbacks defined on an object belong to it.
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_.bindAll = (obj) ->
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funcs = if arguments.length > 1 then _.rest(arguments) else _.functions(obj)
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_.each funcs, (f) -> obj[f] = _.bind obj[f], obj
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obj
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# Delays a function for the given number of milliseconds, and then calls
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# it with the arguments supplied.
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_.delay = (func, wait) ->
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args = _.rest arguments, 2
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setTimeout((-> func.apply(func, args)), wait)
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# Memoize an expensive function by storing its results.
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_.memoize = (func, hasher) ->
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memo = {}
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hasher or= _.identity
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->
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key = hasher.apply this, arguments
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return memo[key] if key of memo
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memo[key] = func.apply this, arguments
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# Defers a function, scheduling it to run after the current call stack has
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# cleared.
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_.defer = (func) ->
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_.delay.apply _, [func, 1].concat _.rest arguments
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# Returns the first function passed as an argument to the second,
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# allowing you to adjust arguments, run code before and after, and
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# conditionally execute the original function.
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_.wrap = (func, wrapper) ->
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-> wrapper.apply wrapper, [func].concat arguments
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# Returns a function that is the composition of a list of functions, each
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# consuming the return value of the function that follows.
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|
_.compose = ->
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funcs = arguments
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->
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args = arguments
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|
|
for i in [funcs.length - 1..0] by -1
|
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|
args = [funcs[i].apply(this, args)]
|
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|
args[0]
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# Object Functions
|
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# ----------------
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# Retrieve the names of an object's properties.
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|
_.keys = nativeKeys or (obj) ->
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|
return _.range 0, obj.length if _.isArray(obj)
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key for key, val of obj
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# Retrieve the values of an object's properties.
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|
_.values = (obj) ->
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_.map obj, _.identity
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# Return a sorted list of the function names available in Underscore.
|
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|
_.functions = (obj) ->
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|
_.filter(_.keys(obj), (key) -> _.isFunction(obj[key])).sort()
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# Extend a given object with all of the properties in a source object.
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_.extend = (obj) ->
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for source in _.rest(arguments)
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obj[key] = val for key, val of source
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obj
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# Create a (shallow-cloned) duplicate of an object.
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_.clone = (obj) ->
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return obj.slice 0 if _.isArray obj
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_.extend {}, obj
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# Invokes interceptor with the obj, and then returns obj.
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# The primary purpose of this method is to "tap into" a method chain,
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# in order to perform operations on intermediate results within
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the chain.
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_.tap = (obj, interceptor) ->
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interceptor obj
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obj
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# Perform a deep comparison to check if two objects are equal.
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_.isEqual = (a, b) ->
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# Check object identity.
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return true if a is b
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# Different types?
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atype = typeof(a); btype = typeof(b)
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return false if atype isnt btype
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# Basic equality test (watch out for coercions).
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return true if `a == b`
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# One is falsy and the other truthy.
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return false if (!a and b) or (a and !b)
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# One of them implements an `isEqual()`?
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return a.isEqual(b) if a.isEqual
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# Check dates' integer values.
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return a.getTime() is b.getTime() if _.isDate(a) and _.isDate(b)
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# Both are NaN?
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return false if _.isNaN(a) and _.isNaN(b)
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# Compare regular expressions.
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if _.isRegExp(a) and _.isRegExp(b)
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return a.source is b.source and
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a.global is b.global and
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a.ignoreCase is b.ignoreCase and
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a.multiline is b.multiline
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# If a is not an object by this point, we can't handle it.
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return false if atype isnt 'object'
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# Check for different array lengths before comparing contents.
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|
return false if a.length and (a.length isnt b.length)
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# Nothing else worked, deep compare the contents.
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aKeys = _.keys(a); bKeys = _.keys(b)
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# Different object sizes?
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return false if aKeys.length isnt bKeys.length
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# Recursive comparison of contents.
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return false for key, val of a when !(key of b) or !_.isEqual(val, b[key])
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true
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# Is a given array or object empty?
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_.isEmpty = (obj) ->
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return obj.length is 0 if _.isArray(obj) or _.isString(obj)
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|
return false for own key of obj
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true
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# Is a given value a DOM element?
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|
_.isElement = (obj) -> obj and obj.nodeType is 1
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# Is a given value an array?
|
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|
_.isArray = nativeIsArray or (obj) -> !!(obj and obj.concat and obj.unshift and not obj.callee)
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# Is a given variable an arguments object?
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_.isArguments = (obj) -> obj and obj.callee
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# Is the given value a function?
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|
_.isFunction = (obj) -> !!(obj and obj.constructor and obj.call and obj.apply)
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# Is the given value a string?
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|
_.isString = (obj) -> !!(obj is '' or (obj and obj.charCodeAt and obj.substr))
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# Is a given value a number?
|
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|
_.isNumber = (obj) -> (obj is +obj) or toString.call(obj) is '[object Number]'
|
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# Is a given value a boolean?
|
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|
|
_.isBoolean = (obj) -> obj is true or obj is false
|
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|
# Is a given value a Date?
|
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|
|
_.isDate = (obj) -> !!(obj and obj.getTimezoneOffset and obj.setUTCFullYear)
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|
# Is the given value a regular expression?
|
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|
|
_.isRegExp = (obj) -> !!(obj and obj.exec and (obj.ignoreCase or obj.ignoreCase is false))
|
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|
# Is the given value NaN -- this one is interesting. `NaN != NaN`, and
|
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|
|
# `isNaN(undefined) == true`, so we make sure it's a number first.
|
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|
|
_.isNaN = (obj) -> _.isNumber(obj) and window.isNaN(obj)
|
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|
# Is a given value equal to null?
|
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|
|
_.isNull = (obj) -> obj is null
|
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# Is a given variable undefined?
|
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_.isUndefined = (obj) -> typeof obj is 'undefined'
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# Utility Functions
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# -----------------
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# Run Underscore.js in noConflict mode, returning the `_` variable to its
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# previous owner. Returns a reference to the Underscore object.
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_.noConflict = ->
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root._ = previousUnderscore
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this
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# Keep the identity function around for default iterators.
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_.identity = (value) -> value
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# Run a function `n` times.
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_.times = (n, iterator, context) ->
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iterator.call context, i for i in [0...n]
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# Break out of the middle of an iteration.
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_.breakLoop = -> throw breaker
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# Add your own custom functions to the Underscore object, ensuring that
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# they're correctly added to the OOP wrapper as well.
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_.mixin = (obj) ->
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for name in _.functions(obj)
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addToWrapper name, _[name] = obj[name]
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# Generate a unique integer id (unique within the entire client session).
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# Useful for temporary DOM ids.
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idCounter = 0
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_.uniqueId = (prefix) ->
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(prefix or '') + idCounter++
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# By default, Underscore uses **ERB**-style template delimiters, change the
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# following template settings to use alternative delimiters.
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_.templateSettings = {
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start: '<%'
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end: '%>'
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interpolate: /<%=(.+?)%>/g
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}
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# JavaScript templating a-la **ERB**, pilfered from John Resig's
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# *Secrets of the JavaScript Ninja*, page 83.
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# Single-quote fix from Rick Strahl.
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# With alterations for arbitrary delimiters, and to preserve whitespace.
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_.template = (str, data) ->
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c = _.templateSettings
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endMatch = new RegExp("'(?=[^"+c.end.substr(0, 1)+"]*"+escapeRegExp(c.end)+")","g")
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fn = new Function 'obj',
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'var p=[],print=function(){p.push.apply(p,arguments);};' +
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'with(obj||{}){p.push(\'' +
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str.replace(/\r/g, '\\r')
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.replace(/\n/g, '\\n')
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.replace(/\t/g, '\\t')
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.replace(endMatch,"<EFBFBD><EFBFBD><EFBFBD>")
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.split("'").join("\\'")
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.split("<EFBFBD><EFBFBD><EFBFBD>").join("'")
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.replace(c.interpolate, "',$1,'")
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.split(c.start).join("');")
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.split(c.end).join("p.push('") +
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"');}return p.join('');"
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if data then fn(data) else fn
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# Aliases
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# -------
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_.forEach = _.each
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_.foldl = _.inject = _.reduce
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_.foldr = _.reduceRight
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_.select = _.filter
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_.all = _.every
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_.any = _.some
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_.contains = _.include
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_.head = _.first
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_.tail = _.rest
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_.methods = _.functions
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|
# Setup the OOP Wrapper
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|
# ---------------------
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# If Underscore is called as a function, it returns a wrapped object that
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|
# can be used OO-style. This wrapper holds altered versions of all the
|
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|
# underscore functions. Wrapped objects may be chained.
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|
wrapper = (obj) ->
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|
this._wrapped = obj
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this
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# Helper function to continue chaining intermediate results.
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|
|
result = (obj, chain) ->
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|
|
if chain then _(obj).chain() else obj
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|
# A method to easily add functions to the OOP wrapper.
|
|
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|
|
addToWrapper = (name, func) ->
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|
|
wrapper.prototype[name] = ->
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|
|
args = _.toArray arguments
|
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|
|
unshift.call args, this._wrapped
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|
result func.apply(_, args), this._chain
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|
|
# Add all ofthe Underscore functions to the wrapper object.
|
|
|
|
|
|
_.mixin _
|
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|
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|
|
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|
|
# Add all mutator Array functions to the wrapper.
|
|
|
|
|
|
_.each ['pop', 'push', 'reverse', 'shift', 'sort', 'splice', 'unshift'], (name) ->
|
|
|
|
|
|
method = Array.prototype[name]
|
|
|
|
|
|
wrapper.prototype[name] = ->
|
|
|
|
|
|
method.apply(this._wrapped, arguments)
|
|
|
|
|
|
result(this._wrapped, this._chain)
|
|
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|
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|
|
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|
|
# Add all accessor Array functions to the wrapper.
|
|
|
|
|
|
_.each ['concat', 'join', 'slice'], (name) ->
|
|
|
|
|
|
method = Array.prototype[name]
|
|
|
|
|
|
wrapper.prototype[name] = ->
|
|
|
|
|
|
result(method.apply(this._wrapped, arguments), this._chain)
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
# Start chaining a wrapped Underscore object.
|
|
|
|
|
|
wrapper::chain = ->
|
|
|
|
|
|
this._chain = true
|
|
|
|
|
|
this
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
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|
|
# Extracts the result from a wrapped and chained object.
|
|
|
|
|
|
wrapper::value = -> this._wrapped
|
|
|
|
|
|
</textarea></form>
|
|
|
|
|
|
<script>
|
|
|
|
|
|
var editor = CodeMirror.fromTextArea(document.getElementById("code"), {});
|
|
|
|
|
|
</script>
|
|
|
|
|
|
|
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|
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|
|
<p><strong>MIME types defined:</strong> <code>text/x-coffeescript</code>.</p>
|
|
|
|
|
|
|
|
|
|
|
|
<p>The CoffeeScript mode was written by Jeff Pickhardt.</p>
|
|
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|
|
</article>
|
