300 lines
12 KiB
HTML
300 lines
12 KiB
HTML
<!DOCTYPE html>
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<html>
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<head>
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<title>browser.coffee</title>
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<meta http-equiv="content-type" content="text/html; charset=UTF-8">
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<meta name="viewport" content="width=device-width, target-densitydpi=160dpi, initial-scale=1.0; maximum-scale=1.0; user-scalable=0;">
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<link rel="stylesheet" media="all" href="docco.css" />
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</head>
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<body>
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<div id="container">
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<div id="background"></div>
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<ul id="jump_to">
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<li>
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<a class="large" href="javascript:void(0);">Jump To …</a>
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<a class="small" href="javascript:void(0);">+</a>
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<div id="jump_wrapper">
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<div id="jump_page_wrapper">
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<div id="jump_page">
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<a class="source" href="browser.html">
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browser.coffee
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</a>
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<a class="source" href="cake.html">
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cake.coffee
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</a>
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<a class="source" href="coffee-script.html">
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coffee-script.coffee
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</a>
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<a class="source" href="command.html">
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command.coffee
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</a>
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<a class="source" href="grammar.html">
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grammar.coffee
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</a>
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<a class="source" href="helpers.html">
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helpers.coffee
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</a>
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<a class="source" href="index.html">
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index.coffee
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</a>
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<a class="source" href="lexer.html">
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lexer.coffee
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</a>
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<a class="source" href="nodes.html">
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nodes.coffee
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</a>
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<a class="source" href="optparse.html">
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optparse.coffee
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</a>
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<a class="source" href="register.html">
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register.coffee
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</a>
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<a class="source" href="repl.html">
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repl.coffee
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</a>
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<a class="source" href="rewriter.html">
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rewriter.coffee
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</a>
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<a class="source" href="scope.html">
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scope.litcoffee
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</a>
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<a class="source" href="sourcemap.html">
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sourcemap.litcoffee
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</a>
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</div>
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</div>
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</li>
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</ul>
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<ul class="sections">
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<li id="title">
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<div class="annotation">
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<h1>browser.coffee</h1>
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</div>
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</li>
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<li id="section-1">
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<div class="annotation">
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<div class="pilwrap ">
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<a class="pilcrow" href="#section-1">¶</a>
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</div>
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<p>This <strong>Browser</strong> compatibility layer extends core CoffeeScript functions
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to make things work smoothly when compiling code directly in the browser.
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We add support for loading remote Coffee scripts via <strong>XHR</strong>, and
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<code>text/coffeescript</code> script tags, source maps via data-URLs, and so on.</p>
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</div>
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<div class="content"><div class='highlight'><pre>
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CoffeeScript = <span class="hljs-built_in">require</span> <span class="hljs-string">'./coffee-script'</span>
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CoffeeScript.<span class="hljs-built_in">require</span> = <span class="hljs-built_in">require</span>
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compile = CoffeeScript.compile</pre></div></div>
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</li>
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<li id="section-2">
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<div class="annotation">
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<div class="pilwrap ">
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<a class="pilcrow" href="#section-2">¶</a>
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</div>
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<p>Use standard JavaScript <code>eval</code> to eval code.</p>
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</div>
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<div class="content"><div class='highlight'><pre>CoffeeScript.eval = <span class="hljs-function"><span class="hljs-params">(code, options = {})</span> -></span>
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options.bare ?= <span class="hljs-literal">on</span>
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eval compile code, options</pre></div></div>
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</li>
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<li id="section-3">
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<div class="annotation">
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<div class="pilwrap ">
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<a class="pilcrow" href="#section-3">¶</a>
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</div>
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<p>Running code does not provide access to this scope.</p>
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</div>
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<div class="content"><div class='highlight'><pre>CoffeeScript.run = <span class="hljs-function"><span class="hljs-params">(code, options = {})</span> -></span>
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options.bare = <span class="hljs-literal">on</span>
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options.shiftLine = <span class="hljs-literal">on</span>
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Function(compile code, options)()</pre></div></div>
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</li>
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<li id="section-4">
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<div class="annotation">
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<div class="pilwrap ">
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<a class="pilcrow" href="#section-4">¶</a>
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</div>
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<p>If we’re not in a browser environment, we’re finished with the public API.</p>
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</div>
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<div class="content"><div class='highlight'><pre><span class="hljs-keyword">return</span> <span class="hljs-keyword">unless</span> <span class="hljs-built_in">window</span>?</pre></div></div>
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</li>
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<li id="section-5">
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<div class="annotation">
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<div class="pilwrap ">
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<a class="pilcrow" href="#section-5">¶</a>
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</div>
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<p>Include source maps where possible. If we’ve got a base64 encoder, a
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JSON serializer, and tools for escaping unicode characters, we’re good to go.
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Ported from <a href="https://developer.mozilla.org/en-US/docs/DOM/window.btoa">https://developer.mozilla.org/en-US/docs/DOM/window.btoa</a></p>
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</div>
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<div class="content"><div class='highlight'><pre><span class="hljs-keyword">if</span> btoa? <span class="hljs-keyword">and</span> JSON?
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<span class="hljs-function"> <span class="hljs-title">compile</span> = <span class="hljs-params">(code, options = {})</span> -></span>
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options.inlineMap = <span class="hljs-literal">true</span>
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CoffeeScript.compile code, options</pre></div></div>
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</li>
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<li id="section-6">
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<div class="annotation">
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<div class="pilwrap ">
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<a class="pilcrow" href="#section-6">¶</a>
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</div>
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<p>Load a remote script from the current domain via XHR.</p>
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</div>
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<div class="content"><div class='highlight'><pre>CoffeeScript.load = <span class="hljs-function"><span class="hljs-params">(url, callback, options = {}, hold = <span class="hljs-literal">false</span>)</span> -></span>
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options.sourceFiles = [url]
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xhr = <span class="hljs-keyword">if</span> <span class="hljs-built_in">window</span>.ActiveXObject
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<span class="hljs-keyword">new</span> <span class="hljs-built_in">window</span>.ActiveXObject(<span class="hljs-string">'Microsoft.XMLHTTP'</span>)
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<span class="hljs-keyword">else</span>
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<span class="hljs-keyword">new</span> <span class="hljs-built_in">window</span>.XMLHttpRequest()
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xhr.open <span class="hljs-string">'GET'</span>, url, <span class="hljs-literal">true</span>
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xhr.overrideMimeType <span class="hljs-string">'text/plain'</span> <span class="hljs-keyword">if</span> <span class="hljs-string">'overrideMimeType'</span> <span class="hljs-keyword">of</span> xhr
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xhr.onreadystatechange = <span class="hljs-function">-></span>
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<span class="hljs-keyword">if</span> xhr.readyState <span class="hljs-keyword">is</span> <span class="hljs-number">4</span>
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<span class="hljs-keyword">if</span> xhr.status <span class="hljs-keyword">in</span> [<span class="hljs-number">0</span>, <span class="hljs-number">200</span>]
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param = [xhr.responseText, options]
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CoffeeScript.run param... <span class="hljs-keyword">unless</span> hold
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<span class="hljs-keyword">else</span>
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<span class="hljs-keyword">throw</span> <span class="hljs-keyword">new</span> Error <span class="hljs-string">"Could not load <span class="hljs-subst">#{url}</span>"</span>
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callback param <span class="hljs-keyword">if</span> callback
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xhr.send <span class="hljs-literal">null</span></pre></div></div>
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</li>
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<li id="section-7">
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<div class="annotation">
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<div class="pilwrap ">
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<a class="pilcrow" href="#section-7">¶</a>
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</div>
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<p>Activate CoffeeScript in the browser by having it compile and evaluate
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all script tags with a content-type of <code>text/coffeescript</code>.
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This happens on page load.</p>
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</div>
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<div class="content"><div class='highlight'><pre><span class="hljs-function"><span class="hljs-title">runScripts</span> = -></span>
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scripts = <span class="hljs-built_in">window</span>.<span class="hljs-built_in">document</span>.getElementsByTagName <span class="hljs-string">'script'</span>
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coffeetypes = [<span class="hljs-string">'text/coffeescript'</span>, <span class="hljs-string">'text/literate-coffeescript'</span>]
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coffees = (s <span class="hljs-keyword">for</span> s <span class="hljs-keyword">in</span> scripts <span class="hljs-keyword">when</span> s.type <span class="hljs-keyword">in</span> coffeetypes)
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index = <span class="hljs-number">0</span>
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<span class="hljs-function">
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<span class="hljs-title">execute</span> = -></span>
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param = coffees[index]
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<span class="hljs-keyword">if</span> param <span class="hljs-keyword">instanceof</span> Array
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CoffeeScript.run param...
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index++
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execute()
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<span class="hljs-keyword">for</span> script, i <span class="hljs-keyword">in</span> coffees
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<span class="hljs-keyword">do</span> (script, i) ->
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options = literate: script.type <span class="hljs-keyword">is</span> coffeetypes[<span class="hljs-number">1</span>]
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source = script.src <span class="hljs-keyword">or</span> script.getAttribute(<span class="hljs-string">'data-src'</span>)
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<span class="hljs-keyword">if</span> source
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CoffeeScript.load source,
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<span class="hljs-function"><span class="hljs-params">(param)</span> -></span>
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coffees[i] = param
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execute()
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options
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<span class="hljs-literal">true</span>
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<span class="hljs-keyword">else</span>
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options.sourceFiles = [<span class="hljs-string">'embedded'</span>]
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coffees[i] = [script.innerHTML, options]
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execute()</pre></div></div>
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</li>
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<li id="section-8">
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<div class="annotation">
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<div class="pilwrap ">
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<a class="pilcrow" href="#section-8">¶</a>
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</div>
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<p>Listen for window load, both in decent browsers and in IE.</p>
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</div>
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<div class="content"><div class='highlight'><pre><span class="hljs-keyword">if</span> <span class="hljs-built_in">window</span>.addEventListener
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<span class="hljs-built_in">window</span>.addEventListener <span class="hljs-string">'DOMContentLoaded'</span>, runScripts, <span class="hljs-literal">no</span>
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<span class="hljs-keyword">else</span>
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<span class="hljs-built_in">window</span>.attachEvent <span class="hljs-string">'onload'</span>, runScripts</pre></div></div>
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</li>
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</ul>
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</div>
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</body>
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</html>
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