// ==UserScript==
// @name          target blank to target self
// @author        Richard Pratt
// @version       1.02
// @include       *
// @namespace     *
// @description   changes a and base target="_blank" to target="_self"
// @grant         none
// Based on earlier script by sameagain
// ==/UserScript==
var a=document.getElementsByTagName('a'),
base=document.getElementsByTagName('base');
for (i=0;i<base.length;i++)
 if (base[i].getAttribute('target')=='_blank')
  base[i].setAttribute('target','_self');
for (i=0;i<a.length;i++)
 if (a[i].getAttribute('target')=='_blank')
  a[i].setAttribute('target','_self');

// ==UserScript==
// @name          Open links in current tab
// @author        wOxxOm
// @description   Open links in current tab regardless of _target or site's preferences. Ctrl-click: background tab, Ctrl-Shift-click: foreground tab, Shift-click: new window, Alt-click: force open in current tab
// @namespace     http://target._blank.is.retarded
// @version       2.2.7
// @include       *
// @run-at        document-start
// @grant         GM_openInTab
// ==/UserScript==

if (window == top) {
    window.addEventListener('message', function(e) {
        // some stupid sites choke on object data
        if (!/^\{/.test(e.data))
            return;
        var data = tryParse(e.data);
        if (data.name == GM_info.script.name)
            navigate(data.url);
    });
}

var suppressing, clickedElement;
window.addEventListener('mousedown', function(e) {
    clickedElement = e.target;
}, true);

window.addEventListener('mouseup', function(e) {
    if (e.button > 1 || e.target != clickedElement)
        return;
    var link = pierceShadow(e);
    if (!link
    || (link.getAttribute('href') || '').match(/^(javascript|#|$)/)
    || !document.contains(link))
        return;
    var b = e.button, c = e.ctrlKey, a = e.altKey, s = e.shiftKey, m = e.metaKey;
    if (b == 1 || c && !a && !m)
        GM_openInTab(link.href, !s || b == 1);
    else if (window.chrome && b === 0 && s && !c && !a && !m)
        link.cloneNode().dispatchEvent(new MouseEvent('click', {shiftKey: true}));
    else if (!c && !s && !m && !a) {
        if (link.target == '_blank')
            link.target = '';
        blockWindowOpenAndMutations(link);
        return;
    }
    else
        return;
    suppressing = true;
    prevent(e);
}, true);

window.addEventListener('click', prevent, true);
window.addEventListener('auxclick', prevent, true);

function prevent(e) {
    if (!suppressing)
        return;
    e.preventDefault();
    e.stopPropagation();
    e.stopImmediatePropagation();
    setTimeout(function() {
        suppressing = false;
    }, 50);
}

function blockWindowOpenAndMutations(link) {
    var observer = new MutationObserver(function() {
        if (link.target == '_blank') {
            link.removeAttribute('target');
            console.log('[Open links in current tab] prevented dynamic target=_blank for', link.href);
            navigate(link.href);
        }
    });
    observer.observe(link, {attributes:true, attributeFilter:['target'], characterData:true});

    var _open = unsafeWindow.open;
    var timeout = setTimeout(function() {
        unsafeWindow.open = _open;
        observer.disconnect();
    }, 50);
    unsafeWindow.open = exportFunction(function(url, name, features) {
        if (!features) {
            console.log('[Open links in current tab] prevented window.open for', url);
            navigate(link.href);
        } else
            _open(url, name, features);
        unsafeWindow.open = _open;
        clearTimeout(timeout);
    }, unsafeWindow);
}

function pierceShadow(e) {
    var el = e.target;
    while (el.shadowRoot)
        el = el.shadowRoot.elementFromPoint(e.clientX, e.clientY);
    return el.closest('a');
}

function navigate(url) {
    if (window == top) {
        var link = document.createElement('a');
        link.href = url;
        link.dispatchEvent(new MouseEvent('click'));
    } else
        top.postMessage(JSON.stringify({name: GM_info.script.name, url: url}), '*');
}

function tryParse(str) {
    try { return JSON.parse(str); }
    catch(e) {}
}