Douban Timeline Marker

You can place a marker on the last newsfeed you have read, so it can be found easily next time. Ctrl-Click on an item to mark it, again to remove the mark.
当前为 2014-06-20 提交的版本，查看最新版本。
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var Flower;
(function (Flower) {
    (function (csser) {
        /**
        * class names are case sensitive: http://devedge-temp.mozilla.org/viewsource/2001/css-class-id/
        */
        function hasClass(e, name) {
            return (new RegExp('(^|\\s)' + name + '(\\s|$)', 'gm')).test(e.className);
        }
        csser.hasClass = hasClass;
    })(Flower.csser || (Flower.csser = {}));
    var csser = Flower.csser;
})(Flower || (Flower = {}));
/// <reference path="hasClass.ts" />
var Flower;
(function (Flower) {
    (function (csser) {
        function addClass(e, name) {
            if (!csser.hasClass(e, name)) {
                e.className += (' ' + name);
            }
        }
        csser.addClass = addClass;
    })(Flower.csser || (Flower.csser = {}));
    var csser = Flower.csser;
})(Flower || (Flower = {}));
var Flower;
(function (Flower) {
    (function (csser) {
        function removeClass(e, name) {
            e.className = e.className.replace(new RegExp('(^|\\s+)' + name + '(?=\\s|$)', 'gm'), '');
        }
        csser.removeClass = removeClass;
    })(Flower.csser || (Flower.csser = {}));
    var csser = Flower.csser;
})(Flower || (Flower = {}));
var Flower;
(function (Flower) {
    (function (csser) {
        function createStyle(rule) {
            var style = document.createElement('style');
            style.type = 'text/css';
            if (style.styleSheet) {
                style.styleSheet.cssText = rule; // IE
            } else {
                style.appendChild(document.createTextNode(rule));
            }
            return style;
        }
        csser.createStyle = createStyle;
    })(Flower.csser || (Flower.csser = {}));
    var csser = Flower.csser;
})(Flower || (Flower = {}));
/// <reference path="createStyle.ts" />
var Flower;
(function (Flower) {
    (function (csser) {
        function addSheet(rule) {
            var head = document.head || document.getElementsByTagName('head')[0];
            head.appendChild(csser.createStyle(rule));
        }
        csser.addSheet = addSheet;
    })(Flower.csser || (Flower.csser = {}));
    var csser = Flower.csser;
})(Flower || (Flower = {}));
// ==UserScript==
// @name			Douban Timeline Marker
// @namespace		https://github.com/henix/userjs/douban_feedmark
// @description		You can place a marker on the last newsfeed you have read, so it can be found easily next time. Ctrl-Click on an item to mark it, again to remove the mark.
// @author			henix
// @version			20140620.3
// @include			http://www.douban.com/*
// @license			MIT License
// @grant			none
// ==/UserScript==
/**
* ChangeLog:
*
* 2012-2-29	henix
* 		don't listen on load event
*
* 2012-2-27	henix
* 		change trigger action from "click" to "Ctrl-click"
*
* 2012-2-14	henix
* 		add another yellow marker on the previous position, and it can't be removed
*
* 2012-2-14	henix
* 		Version 0.1
*/
/// <reference path="flower/csser/addClass.ts" />
/// <reference path="flower/csser/removeClass.ts" />
/// <reference path="flower/csser/addSheet.ts" />
var csser = Flower.csser;

var curMark;

function markItem(e) {
    if (curMark) {
        demarkItem(curMark);
    }
    csser.addClass(e, 'feedmarker');
    curMark = e;
}

function demarkItem(e) {
    csser.removeClass(e, 'feedmarker');
    curMark = null;
}

function getTarget(ev, mse) {
    if (ev) {
        return ev.target;
    } else {
        return mse.srcElement;
    }
}

function clickHandler(ev) {
    var e = (ev || window.event);
    if (!e.ctrlKey) {
        return;
    }
    var tg = getTarget(ev, window.event);
    if (tg.nodeName === 'A') {
        return;
    }
    if (curMark !== this) {
        markItem(this);
        localStorage.setItem('feedmarkid', this.getAttribute('data-sid'));
    } else {
        demarkItem(this);
        localStorage.removeItem('feedmarkid');
    }
}

var markId = localStorage.getItem('feedmarkid');
var stitems = document.querySelectorAll('div.status-item');

csser.addSheet('' + '.feedmarker, .feedmarker-old { border: 1px dashed black }\n' + '.feedmarker-old { border-top: 20px solid #ff6 }\n' + '.feedmarker { border-top: 20px solid #ccc }\n');

for (var i = stitems.length - 1; i >= 0; i--) {
    var stitem = stitems[i];
    if (markId && stitem.getAttribute('data-sid') === markId) {
        csser.addClass(stitem, 'feedmarker-old');
    }
    stitem.addEventListener('click', clickHandler, true); // register for capturing
}
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