// ==UserScript==
// @name           Pylonsdoc View Source
// @namespace      http://wiki.pylonshq.com/display/~knzm/Home
// @include        http://wiki.pylonshq.com/display/*
// @include        http://wiki.pylonshq.com/pages/viewpage.action*
// ==/UserScript==

(function(){
    function getElementsByXPath(xpath, doc, context) {
        if (doc == null) doc = document;
        if (context == null) context = doc;

        var it = doc.evaluate(xpath, context, null, XPathResult.ORDERED_NODE_ITERATOR_TYPE, null);

        var nodes = new Array();
        var node;
        while ((node = it.iterateNext()) != null) {
            nodes.push(node);
        }
        return nodes;
    }

    function onViewSourceClicked(ev) {
        GM_xmlhttpRequest({
            method: 'GET',
            url: ev.target.href,
            onload: function(req) {
                if (req.responseText.match('<div class="padded">[ \n\r]*((?:.|[\r\n])*?)[ \n\r]*</div>')) {
                    var text = RegExp.$1;
                    var win = window.open('', null);
                    win.document.open();
                    win.document.write('<pre>');
                    win.document.write(text.replace(/[\r\n]<br>/g, "\n"));
                    win.document.write('</pre>');
                    win.document.close();
                }
            },
        });

        ev.preventDefault();
        return;
    }

    var info = getElementsByXPath("//a[@accesskey='i']")[0];
    if (info && info.href.match(/\?pageId=(\d+)/)) {
        var pageId = RegExp.$1;
        var a = document.createElement("a");
        a.href = 'http://wiki.pylonshq.com/pages/viewpagesrc.action?pageId=' + pageId;
        // a.target = '_blank';
        a.addEventListener('click', onViewSourceClicked, false);
        a.appendChild(document.createTextNode("View source"));
        var form = getElementsByXPath("//td[@class='pagecontent']/table//tr[position()=1]//td[position()=1]//form")[0];
        if (form != null) {
            form.parentNode.insertBefore(a, form);
        }
    }
})()