mitbbs的机制应该还是要懂的，但是源码看上去也不长，就公开的。
// ==UserScript==
// @name mitbbs
// @namespace smalltalk80.cn
// @description mitbbs
// @include http://www.mitbbs.com/*
// @include http://mitbbs.com/*
// @require http://ajax.googleapis.com/ajax/libs/jquery/1.3.2/jquery.js
// ==/UserScript==
var STORAGE_KEY = "mitbbs.blacklist";
var HIDE_BUTTON_TEXT = "x";
/** Retrieves an array of names from browser storage. */
function loadBlacklist() {
var s = localStorage.getItem(STORAGE_KEY);
if (s) {
var names = s.split(" ");
return names;
}
return new Array();
}
/** Stores an array of names to browser storage. */
function saveBlacklist(names) {
var s = names.join(" ");
localStorage.setItem(STORAGE_KEY, s);
}
/** Retrieves the Y/N flag from browser storage. */
function loadBlacklistFlag() {
var s = localStorage.getItem(STORAGE_KEY + ".flag");
if (s) {
return s;
}
return "Y";
}
/** Saves the Y/N flag to browser storage. */
function saveBlacklistFlag(flag) {
localStorage.setItem(STORAGE_KEY + ".flag", flag);
}
/** Show/hide posts from people in the blacklist. */
function showHidePosts(names) {
var flag = loadBlacklistFlag();
if (flag == "N") {
// Blacklist disabled; show everything.
$("td.taolun_leftright tr").show();
return;
}
// Find the links that point to posters.
$("td.taolun_leftright tr").find("a.news:first").each(function() {
var name = $(this).text();
var match = false;
for (var i = 0; i < names.length; ++ i) {
if (name == names[i]) {
match = true;
break;
}
}
if (match) {
// Get lost!
$(this).parent().parent().hide();
}
else {
$(this).parent().parent().show();
}
});
}
/** Prepares at page load. */
function preparePage() {
// Add a clickable "x" before every poster.
$(".taolun_leftright tr").find("a.news:first").each(function() {
$(this).before("" + HIDE_BUTTON_TEXT + "
span>");
});
$(".hide_button")
.css("margin-right", "10px")
.css("color", "#909090")
.css("cursor", "pointer")
.click(function() {
var name = $(this).nextAll("a").text();
if (confirm("Block " + name + "?")) {
// After the user confirms blocking a poster.
var names = loadBlacklist();
names.push(name);
saveBlacklist(names);
showHidePosts(names);
}
});
// Add a text area that shows all blocked posters.
$(".taolun_leftright").parents("table:first").before("
<
button id="closeBlacklist">Close
");
// The text area is initially hidden.
$("#blacklist").hide().find("textarea").attr("rows", "20").attr("cols",
"100");
// The "Update" button saves user edited content and hides the text area
when clicked.
$("#updateBlacklist").click(function() {
var names = $("#blacklist textarea").val().split(" ");
saveBlacklist(names);
showHidePosts(names);
$("#blacklist").hide();
});
// The "Close" button just hides the text area when clicked.
$("#closeBlacklist").click(function() {
$("#blacklist").hide();
});
// Replace that ad marquee with my buttons. Sorry mitbbs.
$("marquee").replaceWith("<
input type="checkbox" id="enableBlacklist" />");
// The "Blacklist" button shows the text area when clicked.
$("#showBlacklist")
.click(function() {
var names = loadBlacklist();
$("#blacklist").show().find("textarea").val(names.join(" "));
});
// The checkbox on the right side controls whether to show/hide blocked
posters.
var flag = loadBlacklistFlag();
$("#enableBlacklist")
.attr("checked", flag == "Y")
.click(function() {
var flag = $(this).attr("checked") ? "Y" : "N";
saveBlacklistFlag(flag);
var names = loadBlacklist();
showHidePosts(names);
});
// Initial run.
var names = loadBlacklist();
showHidePosts(names);
}
$(document).ready(function() {
preparePage();
});
