python-single-line-convert/index.html at master · 7i11/python-single-line-convert · GitHub

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<!doctype html>
<html>
<head>
	<meta http-equiv="content-type" content="text/html;charset=utf-8"/>
	<title>Python Single Line Converter</title>
	<style type="text/css">
body{
    font-family: Tahoma, Verdana, Segoe, sans-serif;
    color: #444444;
    line-height: 1;
    width: 95%;
}
h1, h2, h3, h4 {
	font-family: Palatino, "Palatino Linotype", "Palatino LT STD", "Book Antiqua", Georgia, serif;
    color: #111111;
    font-weight: 400;
}
h1, h2, h3, h4, h5 {
    margin-bottom: 24px;
    font-weight: bold;
    padding: 0;
}
h1 {
    font-size: 48px;
}
h2 {
    font-size: 36px;
    margin: 24px 0 6px;
}
h3 {
    font-size: 24px;
}
h4 {
    font-size: 21px;
}
h5 {
    font-size: 18px;
}
a {
    color: #0099ff;
    margin: 0;
    padding: 0;
    vertical-align: baseline;
}
a h2 {
    color: #0099ff;
}
ul, ol {
    padding: 0;
    margin: 0;
}
li {
    line-height: 24px;
}
li ul, li ul {
	margin-left: 24px;
}
p, ul, ol {
    font-size: 16px;
    line-height: 24px;
    max-width: 720px;
}
pre {
    padding: 0px 24px;
    max-width: 800px;
    white-space: pre-wrap;
}
code {
    font-family: Consolas, Monaco, Andale Mono, monospace;
    line-height: 1.5;
    font-size: 13px;
}
aside {
    display: block;
    float: right;
    width: 390px;
}
blockquote {
    margin: 1em 2em;
    max-width: 476px;
}
blockquote p {
    color: #666;
    max-width: 460px;
}
hr {
    width: 540px;
    text-align: left;
    margin: 0 auto 0 0;
    color: #999;
}

/* layouts */
#wrapper {
    margin: 4em auto 4em;
    width: 70%;
}
</style>
    <!--[if lt IE 9 ]>
    <script>
    var is_ie_lt9 = true;
    </script>
    <![endif]-->
	<script type="text/javascript">
	// trim polyfill from somewhere on the internet
	if(!String.prototype.trimLeft){
		String.prototype.trimLeft = function() {
			return this.replace(/^[\s|　]+/g, "");
		};
		String.prototype.trimRight = function() {
			return this.replace(/[\s|　]+$/g, "");
		};
		String.prototype.trim = function() {
			return this.trimLeft().trimRight();
		};
	}
	window.onload = function(){
		function convert_to_single_line(code, option) {
            // the lesson here is to NEVER TARGET IE WITHOUT JQUERY
            if (window.is_ie_lt9) {
                code = code.replace(/(\r\n|\r|\n)/g, '\n');
            }

			var ix;
			option = option || {};
			var lines = code.trimRight() // keep left indent
							.replace(/\\/g, '\\\\') //  escape all \
							.replace(/"""/g, '\\"\\"\\"') // escape """
							.split('\n');
			var first_indent;
			for (ix = 0; ix < lines.length; ++ix) {
				if (first_indent === undefined) {
					first_indent = lines[ix].match(/^\s*/);
				}
				if (option.reindent) {
					lines[ix] = lines[ix].replace(new RegExp('^'+first_indent), '');
				}
			}
			lines.unshift('"""');
			lines.push('"""');
			return 'exec'+(option.is_python3 ? '(' : ' ')+lines.join('\\n')+(option.is_python3 ? ')' : '');
		}
		var do_convert = document.getElementById('convert').onclick = function(e) {
			var option = {};
			option.is_python3 = document.getElementById('pyver3').checked;
			option.reindent = document.getElementById('pyreindent').checked;
			var codearea = document.getElementById('codearea');
			codearea.value = convert_to_single_line(codearea.value, option);
		};
		var delayed_convert = function() {
			// to wait paste completion
			window.setTimeout(do_convert, 5);
		};

		document.getElementById('pyauto').onclick = function(e) {
			var checked = document.getElementById('pyauto').checked;
			var codearea = document.getElementById('codearea');
			if (checked) {
                if (window.is_ie_lt9) {
                    codearea.attachEvent("onpaste", delayed_convert);
                } else {
                    codearea.addEventListener('paste', delayed_convert, false);
                }
			} else {
                if (window.is_ie_lt9) {
                    codearea.detachEvent("onpaste", delayed_convert);
                } else {
                    codearea.removeEventListener('paste', delayed_convert);
                }
			}
		}

	};
	</script>
</head>
<body>
	<div id="wrapper">
		<h1>Python Single Line Converter</h1>
		<p>
			Convert multiple line Python code to a single line in a dead simple way.<br/>
			Paste your code below and hit Convert
		</p>
		<div>
		<input type="radio" name="pyver" id="pyver2" value="Python 2" checked="checked" /> Python 2
		<input type="radio" name="pyver" id="pyver3" value="Python 3" /> Python 3
		<input type="checkbox" name="pyreindent" id="pyreindent" checked="checked"> Reindent based on first line's indent
		<input type="checkbox" name="pyauto" id="pyauto"> Auto convert on paste
		<br/><br/>
		<textarea id="codearea" cols="120" rows="30">
        # 'Reindent based on first line's indent' will reindent -8 spaces in this case
        # comments are still kept at this moment
        from datetime import datetime
        def foo():
            """triple double quotes are escaped"""
            return '"Hey kid what time is it?"'
        print foo() + '''\n\t'''    \
        	        + str(datetime.now())
        try:
            raise RuntimeError()
        except:
            pass
        # ending \ will be removed, but this happens very rare
        \</textarea>
		<br/><br/>
		<button id="convert">Convert</button>
		</div>
		<p>
			<h2>Rationale</h2>
			<p>Ease copy pasting Python code in some cases (e.g paste into Python shell or through Putty). If you find yourself need this a lot you may consider using <a href="http://ipython.org/">ipython</a> with the <code>%paste</code> command, or a graphic based one like <a href="http://www.dreampie.org/">dreampie</a></p>
			<h2>How it works</h2>
			<p>Basically it paste your multiline code together into a triple quoted string and wraps it with <a href="http://docs.python.org/2/reference/simple_stmts.html#the-exec-statement">exec</a>. To keep the code legal the string is processed as follows:</p>
			<ol>
			<li>Escape all <code>\</code>, then escape <code>"""</code>.</li>
			<li>Reindent to 0 indent based on first line if option is selected. So you can paste indented code directly.</li>
			<li>Wraps <code>exec</code> statement or function based on version option.</li>
			</ol>
			<h2>Limitations</h2>
			<ol>
			<li>Won't remove comments and docstring. Properly handling these needs more work.</li>
			<li>Of course can't check the original code is syntatically legal or properly indented.</li>
			<li>Only tested by randomly copying code from Python Recipes... So please report missing cases.</li>
			</ol>
			<a href="https://github.com/jagt/python-single-line-convert"><h2>Repo</h2></a>
			<p><a href="&#109;&#97;&#105;&#108;&#116;&#111;&#58;&#106;&#97;&#103;&#116;&#116;&#116;&#64;&#103;&#109;&#97;&#105;&#108;&#46;&#99;&#111;&#109;">&#106;&#97;&#103;&#116;&#116;&#116;&#64;&#103;&#109;&#97;&#105;&#108;&#46;&#99;&#111;&#109;</a></p>
		</p>
	</div>
</body>
</html>