Tumblr. megaeditor extention

extention for Tumblr. megaeditor

You will need to install an extension such as Tampermonkey, Greasemonkey or Violentmonkey to install this script.

You will need to install an extension such as Tampermonkey to install this script.

You will need to install an extension such as Tampermonkey or Violentmonkey to install this script.

You will need to install an extension such as Tampermonkey or Userscripts to install this script.

You will need to install an extension such as Tampermonkey to install this script.

You will need to install a user script manager extension to install this script.

(I already have a user script manager, let me install it!)

You will need to install an extension such as Stylus to install this style.

You will need to install an extension such as Stylus to install this style.

You will need to install an extension such as Stylus to install this style.

You will need to install a user style manager extension to install this style.

You will need to install a user style manager extension to install this style.

You will need to install a user style manager extension to install this style.

(I already have a user style manager, let me install it!)

// ==UserScript==
// @name        Tumblr. megaeditor extention
// @namespace   http://www.sharkpp.net/
// @version     0.1
// @description extention for Tumblr. megaeditor
// @author      sharkpp
// @copyright   2014, sharkpp
// @license     MIT License
// @match       https://www.tumblr.com/mega-editor/*
// ==/UserScript==
(function ()
{
    var navItem = document.evaluate('//*[@id="nav_archive"]/div[@class="editor_navigation"]', document,
                                    null, XPathResult.UNORDERED_NODE_SNAPSHOT_TYPE, null);
        navItem = navItem.snapshotLength ? navItem.snapshotItem(0) : null;
    var elm, buttonSelectAll = document.createElement('div');
        buttonSelectAll.className = 'header_button';
        elm = buttonSelectAll.insertBefore(document.createElement('button'), null);
            elm.type = 'button';
            elm.className = 'chrome big_dark';
            elm = elm.insertBefore(document.createElement('div'), null);
                elm.className = 'chrome_button';
                elm.insertBefore(document.createElement('div'), null).className = 'chrome_button_left';
                elm.insertBefore(document.createTextNode('全て選択'), null);
                elm.insertBefore(document.createElement('div'), null).className = 'chrome_button_right';
        buttonSelectAll.onclick = function(){
                var selectItem = document.evaluate('//a[contains(@id,"post_")][contains(concat(" ",normalize-space(@class)," ")," highlighted ")]',
                                                   document,null, XPathResult.UNORDERED_NODE_SNAPSHOT_TYPE, null);
                    selectItem = selectItem.snapshotLength ? selectItem.snapshotItem(0) : null;
                var items = document.evaluate('//a[contains(@id,"post_")]', document,
                                              null, XPathResult.UNORDERED_NODE_SNAPSHOT_TYPE, null);
                for (var i = 0, item, selectRest = -1; item = items.snapshotItem(i); i++) {
                    if (-1 == selectRest && (!selectItem || item == selectItem)) {
                        selectRest = 100; // limitation of Tumblr. 
                    }
                    if (0 < selectRest) {
                        if (item != selectItem)
                            item.onclick();
                        selectRest--;
                    }
                }
            };

    navItem.insertBefore(buttonSelectAll, navItem.firstChild);
})();