gistfile1.txt

// ==UserScript==
// @name           NicoVideo Multiple Tag Search Tool
// @namespace      http://endflow.net/
// @description    allows to search with multiple tags from tag list in NicoVideo watching page.
// @include        http://*.nicovideo.jp/watch/*
// @version        0.1.2
// ==/UserScript==
// @author         Yuki KODAMA (Twitter: kuy, Skype: netkuy)
// @history        [2009-02-02] 0.1.0 first version
//                 [2009-02-02] 0.1.1 bugfix: apply ui changes after finished editing
//                 [2009-02-02] 0.1.2 Hyakka button fix & serch as word

(function(){
var w = this.unsafeWindow || window;

// main
init();

// functions
function init(){
    insertCheckbox();
    insertSearchButton();
    insertTagSearchButton();
    $x('id("video_tags")/p//a[contains(@href,"javascript:")]').forEach(function(edit){
        edit.addEventListener('click', function(){hookFButton()}, false);
    });
}
function insertCheckbox(){
    $if($x('id("video_tags")//a[@rel="tag"]'), function(tag){
        var span = $n('span');
        span.innerHTML = '<input type="checkbox" value="' + tag.innerHTML
            + '"onclick="nvmts_onclick();" />';
        tag.parentNode.insertBefore(span, tag);
    }, function(){
        setTimeout(insertCheckbox, 300);
    });
}
function insertTagSearchButton(){
    if($('nvmtst')) return;
    $x('id("video_tags")/p[@class="tag_txt"]/strong[1]')[0].innerHTML
        += '<nobr>&nbsp;&nbsp;<a style="color: rgb(0,51,255);" href="javascript:void(0);" id="nvmtst">【タグ検索】</a></nobr>';
}
function insertSearchButton(){
    if($('nvmtsw')) return;
    $x('id("video_tags")/p[@class="tag_txt"]/strong[1]')[0].innerHTML
        += '<nobr>&nbsp;&nbsp;<a style="color: rgb(0,51,255);" href="javascript:void(0);" id="nvmtsw">【検索】</a></nobr>';
}
function hookFButton(){
    $IF($x('id("tag_edit_form")//form[contains(@action,"javascript:")]/input'), function(finish){
        finish.addEventListener('click', function(){
            setTimeout(function(){init()}, 300);
        }, false);
    }, function(){
        setTimeout(hookFButton, 100);
    });
}
w.nvmts_onclick = function(){
    var button = $('nvmtst');
    button.href = 'http://www.nicovideo.jp/tag/'
        + $x('id("video_tags")//input[@type="checkbox"]')
            .filter(function(cb){return cb.checked})
            .map(function(cb){return cb.value})
            .join('+');
    var button = $('nvmtsw');
    button.href = 'http://www.nicovideo.jp/search/'
        + $x('id("video_tags")//input[@type="checkbox"]')
            .filter(function(cb){return cb.checked})
            .map(function(cb){return cb.value})
            .join('+');
}
// utils
function $if(a,t,f,o){(a!=null&&0<a.length)?a.forEach(function(i){t.call(o,i)}):f.call(o)}
function $IF(a,t,f,o){(a!=null&&0<a.length)?t.call(o,a[0]):f.call(o)}
function $x(x,c){c=c||w.document;var r=w.document.evaluate(x,c,null,4,null);
for(var i,nodes=[];i=r.iterateNext();nodes.push(i));return nodes}
function $(id){return w.document.getElementById(id)}
function $n(tagName){return w.document.createElement(tagName)}
})();