Lightweight textarea behavior for inserting Unicode symbols
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README.html

README.html

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html>
<head>
    <meta http-equiv="Content-type" content="text/html; charset=utf-8">
    <title>Unicons - Readme</title>
    <link rel="stylesheet" href="css/unicons.css" type="text/css" media="screen" charset="utf-8">
    <script type="text/javascript" charset="utf-8" src="http://ajax.googleapis.com/ajax/libs/jquery/1.4.2/jquery.min.js"></script>
    <script type="text/javascript" charset="utf-8" src="js/unicons.js"></script>
    <style type="text/css" media="screen">
        body {
            font-family: Helvetica;
        }
        h1 {
            font-size: 20px;
        }
        h2 {
            font-size: 18px;
        }
        p {
            font-size: 16px;
        }
        textarea {
            padding: 2px;
            margin: 0;
            font-size: 18px;
        }
        pre {
            margin: 0 3em;
            font-size: 11px;
        }
    </style>
</head>

<body>
    <a href="http://github.com/bradchoate/unicons"><img style="position: absolute; top: 0; right: 0; border: 0;" src="http://s3.amazonaws.com/github/ribbons/forkme_right_green_007200.png" alt="Fork me on GitHub" /></a>

    <h1>Unicons</h1>

    <p>For times when you can't insert images into your posts, you can insert
    Unicons!</p>

    <p>Use this on Twitter, TypePad, Tumblr... pretty much any text field on
    the web that accepts unicode characters.</p>

    <h2>Usage</h2>

    <p>For your own site, you can attach the minimal Unicon control UI by
    referencing the Unicons CSS stylesheet and the JavaScript files and
    jQuery, which can be loaded locally or (as shown) from Google: </p>

    <pre>&lt;script type=&quot;text/javascript&quot; charset=&quot;utf-8&quot; src=&quot;http://ajax.googleapis.com/ajax/libs/jquery/1.4.2/jquery.min.js&quot;&gt;&lt;/script&gt;
&lt;link rel=&quot;stylesheet&quot; href=&quot;css/unicons.css&quot; type=&quot;text/css&quot; media=&quot;screen&quot; charset=&quot;utf-8&quot;&gt;
&lt;script type=&quot;text/javascript&quot; charset=&quot;utf-8&quot; src=&quot;js/unicons.js&quot;&gt;&lt;/script&gt;</pre>

    <p>This will cause all <code>textarea</code> controls on the page to be
    modified. To specifically exclude certain controls, add a "no-unicons" CSS
    class to the <code>textarea</code> tag.</p>

    <h2>Bookmarklet</h2>

    <p>To install, drag and drop this link to your bookmarks bar: 

    <a href="javascript:void(function()%20{if%20(document.characterSet%20!=%20%27UTF-8%27)%20{if%20(!confirm(%22This%20document%20doesn%27t%20appear%20to%20support%20Unicode%20(character%20set%20is%20%27%22%20+%20document.characterSet%20+%20%22%27).%20Continue%20anyway?%22))%20{return;}}function%20insertAtCaret(txtarea,%20text)%20{var%20scrollPos%20=%20txtarea.scrollTop;var%20strPos%20=%200;var%20br%20=%20((txtarea.selectionStart%20||%20txtarea.selectionStart%20==%20%270%27)%20?%22ff%22%20:%20(document.selection%20?%20%22ie%22%20:%20false%20)%20);if%20(br%20==%20%22ie%22)%20{txtarea.focus();var%20range%20=%20document.selection.createRange();range.moveStart%20(%27character%27,%20-txtarea.value.length);strPos%20=%20range.text.length;}else%20if%20(br%20==%20%22ff%22)strPos%20=%20txtarea.selectionStart;var%20front%20=%20(txtarea.value).substring(0,strPos);var%20back%20=%20(txtarea.value).substring(strPos,txtarea.value.length);txtarea.value%20=%20front%20+%20text%20+%20back;strPos%20=%20strPos%20+%20text.length;if%20(br%20==%20%22ie%22)%20{txtarea.focus();var%20range%20=%20document.selection.createRange();range.moveStart%20(%27character%27,%20-txtarea.value.length);range.moveStart%20(%27character%27,%20strPos);range.moveEnd%20(%27character%27,%200);range.select();}else%20if%20(br%20==%20%22ff%22)%20{txtarea.selectionStart%20=%20strPos;txtarea.selectionEnd%20=%20strPos;txtarea.focus();}txtarea.scrollTop%20=%20scrollPos;}window.unicon_insert%20=%20function(ev,%20ch)%20{var%20txt%20=%20jQuery(ev.target).closest(%22.unicons-textarea-wrap%22).children(%22textarea%22).get(0);insertAtCaret(txt,%20ch);return%20false;};var%20unicons%20=%20function()%20{var%20unicon_table%20=%20[%22%E2%9D%9D%22,%20%22%E2%9D%9E%22,%20%22%E2%98%83%22,%20%22%E2%99%A5%22,%20%22%E2%9D%A4%22,%20%22%E2%99%A0%22,%20%22%E2%99%A6%22,%20%22%E2%99%A3%22,%20%22%E2%98%99%22,%20%22%E2%9D%A7%22,%20%22%E2%9D%A6%22,%20%22%E2%9C%8C%22,%20%22%E2%98%BA%22,%22%E2%98%B9%22,%20%22%E2%98%8E%22,%20%22%E2%98%91%22,%20%22%E2%9C%94%22,%20%22%E2%9C%84%22,%20%22%E2%9C%8E%22,%20%22%E2%98%AE%22,%20%22%E2%98%85%22,%20%22%E2%98%86%22,%20%22%E2%98%81%22,%20%22%E2%98%82%22,%20%22%E2%98%94%22,%20%22%E2%98%92%22,%22%E2%9C%82%22,%20%22%E2%9C%88%22,%20%22%E2%98%95%22,%20%22%E2%8C%9A%22,%20%22%E2%8C%9B%22,%20%22%E2%99%AA%22,%20%22%E2%99%AB%22,%20%22%E2%9A%A0%22,%20%22%E2%9C%BF%22,%20%22%E2%9D%84%22,%20%22%E2%9C%B0%22,%20%22%E2%99%94%22,%20%22%E2%99%95%22,%22%E2%99%96%22,%20%22%E2%99%97%22,%20%22%E2%99%98%22,%20%22%E2%99%99%22,%20%22%E2%99%9A%22,%20%22%E2%99%9B%22,%20%22%E2%99%9C%22,%20%22%E2%99%9D%22,%20%22%E2%99%9E%22,%20%22%E2%99%9F%22,%20%22%E2%9A%90%22,%20%22%E2%9A%91%22];var%20unicon_markup%20=%20%27%3Cdiv%20class=%22unicons-ui%22%3E%3Cdiv%20class=%22unicons-toggle%22%3E%E2%98%BA%3C/div%3E%3Cdiv%20class=%22unicons-frame%22%3E%3Cul%20class=%22unicons-table%22%3E%27;for%20(var%20i%20=%200,%20ii%20=%20unicon_table.length;%20i%20%3C%20ii;%20i++)%20{var%20ch%20=%20unicon_table[i];unicon_markup%20+=%20%27%3Cli%3E%3Ca%20href=%22#%22%20onclick=%22return%20unicon_insert(event,%20\%27%27%20+ch%20+%20%27\%27)%22%3E%27%20+%20ch%20+%20%27%3C/a%3E%3C/li%3E%27;}unicon_markup%20+=%20%27%3C/ul%3E%3C/div%3E%3C/div%3E%27;jQuery(%22textarea%22).each(function()%20{jQuery(this).wrap(%27%3Cdiv%20class=%22unicons-textarea-wrap%22/%3E%27);});jQuery(%22.unicons-textarea-wrap%22).each(function()%20{jQuery(this).prepend(unicon_markup);});};var%20css%20=%20document.createElement(%27style%27);var%20css_rules%20=%20%27.unicons-textarea-wrap%20{position:%20relative;display:%20inline-block;}\n.unicons-textarea-wrap:after%20{display:%20block;content:%20%22%20%22;visibility:%20hidden;clear:%20both;height:%200.1px;font-size:%200.1em;line-height:%200;}\n.unicons-textarea-wrap:hover%20.unicons-toggle%20{display:%20block;}\n.unicons-toggle%20{text-align:center;font-size:%2016px;display:%20none;position:%20absolute;top:%200;right:%200;background-color:%20#000;color:%20#fff;width:%2018px;margin:%200;padding:%203px;opacity:%200.5;-moz-opacity:%200.5;filter:alpha(opacity=50);}\n.unicons-ui:hover%20.unicons-toggle%20{display:%20none;}\n.unicons-ui:hover%20.unicons-frame%20{display:%20block;}\n.unicons-frame%20{display:%20none;background-color:%20#ccc;width:%2075%;top:%200;right:%200;position:%20absolute;}\n.unicons-table%20{margin:%200;padding:%200;font-size:%2020px;}\n.unicons-table%20li%20{display:%20inline;list-style:%20none;margin:%200;padding:%200;}\n.unicons-table%20a%20{display:%20inline-block;text-align:%20center;width:%2020px;margin:%200;padding:%205px;}\n.unicons-table%20a,.unicons-table%20a:visited,.unicons-table%20a:link%20{text-decoration:%20none;color:%20#000;}\n.unicons-table%20a:hover%20{background-color:%20#000;color:%20#fff;}%27;if%20(document.all){css.innerText%20=%20css_rules;}else{css.textContent%20=%20css_rules;}var%20head%20=%20document.getElementsByTagName(%27head%27)[0];head.appendChild(css);if%20(!%20window.jQuery)%20{var%20s%20=%20document.createElement(%27script%27);s.src%20=%20%27http://ajax.googleapis.com/ajax/libs/jquery/1.4.2/jquery.min.js%27;head.appendChild(s);s.onload%20=%20unicons;}else%20{unicons();}}%20())">Unicons</a></p>

    <h2>Demo</h2>

    <p>Move your mouse over the textarea below to reveal the Unicons
    control.</p>

    <form>
        <textarea rows="5" cols="60"></textarea>
    </form>

    <h2>Support</h2>

    <p>If you have any issues to report, please submit them to the <a
    href="http://github.com/bradchoate/unicons/issues">GitHub issues
    tracker</a> for this project.</p>

    <h2>License</h2>

    <p>This code is available under the BSD license.</p>

</body>
</html>