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