User:Quarl/watchlist.js

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// [[User:Quarl/watchlist.js]] - adds buttons to watchlist: "unwatch", "diff
// since"

//  UNWATCH button asynchronously unwatches and crosses the entry off the
//  watchlist.
//
//  DIFF SINCE button shows differences since last edited.

// quarl 2006-01-09 added asynchronous feature.
// quarl 2006-02-03 factored; added diff since.

// requires: wikipage.js, util.js, wikiwatch.js, diffsince.js

// originally based on http://en.wikipedia.org/wiki/User:Omegatron/monobook.js
// see also http://en.wikipedia.org/wiki/User:Matthewmayer/monobook.js

// see also Bug 424 http://bugzilla.wikipedia.org/show_bug.cgi?id=424

// <pre><nowiki>

var watchlist = new Object();
watchlist.wp = {};

watchlist.unwatchAsync = function(pagename) {
    var wp = watchlist.wp[pagename];
    if (!wp) { alert("## internal error 72192d74-ab57-4a98-917f-8c6ca03b0559"); return; }
    wikiwatch.unwatchAsync(wp, watchlist._unwatchSuccess, wp.unwatchSpan);
    return false;
}

watchlist.watchAsync = function(pagename) {
    var wp = watchlist.wp[pagename];
    if (!wp) { alert("## internal error 72192d74-ab57-4a98-917f-8c6ca03b0559"); return; }
    wikiwatch.watchAsync(wp, watchlist._watchSuccess, wp.unwatchSpan);
    return false;
}

watchlist.diffSince = function(pagename) {
    var wp = watchlist.wp[pagename];
    if (!wp) { alert("## internal error 72192d74-ab57-4a98-917f-8c6ca03b0559"); return; }
    return diffsince.diffPageAsync(wp, wp.diffsinceSpan);
}

watchlist._addStrikeThrough = function(node) {
    // return node && insertNode(node, document.createElement('s'));
    if (!node) return 0;

    addClass(ensureSpan(node), 'history-deleted');
    return 1;
}

watchlist._removeStrikeThrough = function(node) {
    if (!node) return 0;

    removeClass(ensureSpan(node), 'history-deleted');
    return 1;
}

watchlist._unwatchSuccess = function(wp) {
    var wpNT = wp.notalkPage();
    var wpT = wp.talkPage();

    if (0 == (watchlist._addStrikeThrough(findHref(wpNT.url)) +
              watchlist._addStrikeThrough(findHref(wpT.url))))
    {
        alert("Unwatched article '"+wp.page+"', but couldn't annotate current page.");
        return;
    }

    watchlist._updateWuwLink(wpT, 'watch');
    watchlist._updateWuwLink(wpNT, 'watch');
}

watchlist._watchSuccess = function(wp) {
    var wpNT = wp.notalkPage();
    var wpT = wp.talkPage();

    if (0 == (watchlist._removeStrikeThrough(findHref(wpNT.url)) +
              watchlist._removeStrikeThrough(findHref(wpT.url))))
    {
        alert("Watched article '"+wp.page+"', but couldn't annotate current page.");
        return;
    }

    watchlist._updateWuwLink(wpT, 'unwatch');
    watchlist._updateWuwLink(wpNT, 'unwatch');
}

// Update a watch/unwatch link.  Returns 1 on success, 0 if not found.
//
// wuw must be 'watch' or 'unwatch'
watchlist._updateWuwLink = function(wpX, wuw) {
    wp = watchlist.wp[wpX.page];
    if (!wp) return 0;
    var link = "javascript:return watchlist."+wuw+"Async("+string_quote_escape(wp.page)+")";
    var url = wp.qurl+'&action='+wuw;
    wp.unwatchSpan.innerHTML = '<a onclick="'+link+'" href="' + url + '">'+wuw+'</a>';
    return 1;
}


watchlist._load = function()
{
    if (wikiPage.page == "Special:Watchlist") watchlist._annotatePage();
}

watchlist._annotatePage = function() {
    var links = copyArray(document.getElementById('bodyContent').getElementsByTagName('a'));
    for (i in links) {
        var link = links[i];
        if (link.href && link.href.match(/action=history$/)) {
            var wp = new WikiPage(link.href);
            watchlist.wp[wp.page] = wp;

            wp.unwatchSpan = document.createElement('span');
            var unwatchLink = "javascript:return watchlist.unwatchAsync("+string_quote_escape(wp.page)+")";
            var unwatchUrl = wp.qurl+'&action=unwatch';
            wp.unwatchSpan.innerHTML = '<a onclick="'+unwatchLink+'" href="' + unwatchUrl + '">unwatch</a>';
            add_after(link, wp.unwatchSpan);
            add_after(link, document.createTextNode('; '));

            wp.diffsinceSpan = document.createElement('span');
            diffsinceLink = "javascript:return watchlist.diffSince("+string_quote_escape(wp.page)+")";
            var diffsinceUrl = diffsince.makeUrl(wp);
            wp.diffsinceSpan.innerHTML = '<a onclick="'+diffsinceLink+'" href="' + diffsinceUrl + '">since</a>';
            add_before(link, wp.diffsinceSpan);
            add_before(link, document.createTextNode('; '));
        }
    }
}

addOnloadHook(watchlist._load);

// </nowiki></pre>