// ==UserScript==
// @name        pakku.user.js
// @description GreaseMonkey version of pakku.js.
// @include     *://*.bilibili.com/*
// @version     1.1
// @grant       none
// @namespace me.fts.pakkujs
// ==/UserScript==
(function(){
// Configuration
// I am too lazy to add configuration UI :)
THRESHOLD=20;
TRIM_ENDING=true;
TAOLUS=[[/^23{2,}$/,"233..."],[/^6{3,}$/,"666..."],[/^[fF]+$/,"FFF..."],[/^[hH]+$/,"hhh..."]];
REMOVE_SEEK=true;
PROC_TYPE7=true;
MAX_COSINE=80;
MAX_DIST=3;
TRIM_ENDING=true;
TRIM_SPACE=true;
WHITELIST=[];
DANMU_MARK='suffix';
ENLARGE=true;
//Unused in script:
/*
DANMU_BADGE
FLASH_NOTIF
POPUP_BADGE
//*/
function fromholyjson(txt) {
var item=JSON.parse(txt);
for(var i in item)
item[i][0]=RegExp(item[i][0]);
return item;
}
function toholyjson(obj) {
var item=[];
for(var i in obj)
item.push([obj[i][0].source,obj[i][1]]);
return JSON.stringify(item);
}
// Copied from edit_distance.js
var ed_counts = new Int16Array (0x10ffff);
var ed_a = new Int16Array (1048576);
var ed_b = new Int16Array (1048576);
var ed_t = new Int32Array (2048);
var MIN_DANMU_SIZE=10;
function hash(a, b) {
return ((a<<10)^b)&1048575;
}
function edit_distance (P, Q) {
'use strict';
// TODO: Make this less hacky
if (P.length + Q.length < MIN_DANMU_SIZE)
return (MAX_DIST + 1) * +(P != Q);
for (var i = 0; i < P.length; i ++) ed_counts [P.charCodeAt (i)] ++;
for (var i = 0; i < Q.length; i ++) ed_counts [Q.charCodeAt (i)] --;
var ans = 0;
for (var i = 0; i < P.length; i ++) {
ans += Math.abs (ed_counts[P.charCodeAt (i)]);
ed_counts[P.charCodeAt (i)] = 0;
}
for (var i = 0; i < Q.length; i ++) {
ans += Math.abs (ed_counts[Q.charCodeAt (i)]);
ed_counts[Q.charCodeAt (i)] = 0;
}
return ans;
}
function cosine_distance (P, Q) {
'use strict';
var ed_t_p = 0;
ed_a[hash(P.charCodeAt(P.length - 1), P.charCodeAt(0))] = 1;
ed_b[hash(Q.charCodeAt(Q.length - 1), Q.charCodeAt(0))] = 1;
ed_t[ed_t_p++] = hash(P.charCodeAt(P.length - 1), P.charCodeAt(0));
ed_t[ed_t_p++] = hash(Q.charCodeAt(Q.length - 1), Q.charCodeAt(0));
for (var i = 0; i < P.length - 1; i++) {
var h1 = hash(P.charCodeAt(i), P.charCodeAt(i + 1));
ed_t[ed_t_p++] = h1;
ed_a[h1] += 1;
}
for (var i = 0; i < Q.length - 1; i++) {
var h1 = hash(Q.charCodeAt(i), Q.charCodeAt(i + 1));
ed_t[ed_t_p++] = h1;
ed_b[h1] += 1;
}
var data = Array();
var x = 0, y = 0, z = 0;
for (var i = 0; i < ed_t_p; i++) {
var h1 = ed_t[i];
if (ed_a[h1]) {
y += ed_a[h1] * ed_a[h1];
if (ed_b[h1]) {
x += ed_a[h1] * ed_b[h1];
z += ed_b[h1] * ed_b[h1];
ed_b[h1] = 0;
}
ed_a[h1] = 0;
}
else {
if (ed_b[h1]) {
z += ed_b[h1] * ed_b[h1];
ed_b[h1] = 0;
};
}
}
//console.log(x,y,z);
return x * x / y / z;
}
function similar(P,Q) {
return edit_distance(P,Q)<=MAX_DIST || cosine_distance(P,Q)*100>=MAX_COSINE;
}
// Copied from core.js
var trim_ending_re=/^(.+?)[\.。,，/\?？!！~～@\^、+=\-_♂♀ ]*$/;
var trim_space_re=/[ 　]/g;
var LOG_VERBOSE=true;
function parse(old_dom,tabid) {
TAOLUS_len=TAOLUS.length;
WHITELIST_len=WHITELIST.length;
//chrome.browserAction.setTitle({
//		title: '正在处理弹幕…', // if u can see this, pakku might not be working correctly :)
//	  tabId: tabid
//});
console.time('parse');
function enlarge(size,count) {
return count<=10 ? size : Math.floor(size*Math.log10(count));
}
function make_mark(txt,cnt) {
return DANMU_MARK=='suffix' ? txt+' [x'+cnt+']' :
DANMU_MARK=='prefix' ? '[x'+cnt+'] '+txt : txt;
}
function detaolu(text) {
for(var i=0;i<TAOLUS_len;i++)
if(TAOLUS[i][0].test(text))
return TAOLUS[i][1];
text = TRIM_ENDING ? text.replace(trim_ending_re,'$1') : text;
text = TRIM_SPACE ? text.replace(trim_space_re,'') : text;
return text;
}
function whitelisted(text) {
for(var i=0;i<WHITELIST_len;i++)
if(WHITELIST[i][0].test(text))
return true;
return false;
}
function ext_special_danmu(text) {
try {
return JSON.parse(text)[4];
} catch(e) {
return text;
}
}
function build_text(elem) {
var count=elem.count;
var dumped=null;
if(elem.mode=='7') // special danmu, need more parsing
try {
dumped=JSON.parse(elem.orig_str);
} catch(e) {}
if(dumped) {
dumped[4]=count==1?dumped[4]:make_mark(elem.str,count);
return JSON.stringify(dumped);
} else // normal case
return count==1?elem.orig_str:make_mark(elem.str,count);
}
var parser=new DOMParser();
var dom=parser.parseFromString(old_dom,'text/xml');
var new_dom=parser.parseFromString('<i></i>','text/xml');
var i_elem=new_dom.childNodes[0];
var danmus=[];
[].slice.call(dom.childNodes[0].children).forEach(function(elem) {
if(elem.tagName=='d') { // danmu
var attr=elem.attributes['p'].value.split(',');
var str=elem.childNodes[0] ? elem.childNodes[0].data : '';
if(!PROC_TYPE7 && attr[1]=='7') // special danmu
i_elem.appendChild(elem);
else if(attr[1]=='8') { // code danmu
if(REMOVE_SEEK && str.indexOf('Player.seek(')!=-1)
elem.childNodes[0].data='/* player.seek filtered by pakku */';
i_elem.appendChild(elem);
} else if(whitelisted(str)) {
i_elem.appendChild(elem);
} else
danmus.push({
attr: attr, // thus we can build it into new_dom again
str: attr[1]=='7' ? detaolu(ext_special_danmu(str)) : detaolu(str),
time: parseFloat(attr[0]),
orig_str: str,
mode: attr[1],
count: 1,
});
} else
i_elem.appendChild(elem);
});
danmus.sort(function(x,y) {return x.time-y.time;});
var danmu_chunk=Array();
var last_time=0;
var counter=0;
function apply_item(dm) {
counter+=dm.count-1;
var d=new_dom.createElement('d');
var tn=new_dom.createTextNode(build_text(dm));
d.appendChild(tn);
if(ENLARGE)
dm.attr[2]=''+enlarge(parseInt(dm.attr[2]),dm.count);
d.setAttribute('p',dm.attr.join(','));
i_elem.appendChild(d);
}
danmus.forEach(function(dm) {
while(danmu_chunk.length && dm.time-danmu_chunk[0].time>THRESHOLD)
apply_item(danmu_chunk.shift());
for(var i=0;i<danmu_chunk.length;i++) {
if(similar(dm.str,danmu_chunk[i].str)) {
if(LOG_VERBOSE) {
if(edit_distance(dm.str,danmu_chunk[i].str)>MAX_DIST)
console.log('cosine_dis',dm.str,'to',danmu_chunk[i].str);
else
console.log('edit_dis',dm.str,'to',danmu_chunk[i].str);
}
danmu_chunk[i].count++;
return; // aka continue
}
}
danmu_chunk.push(dm);
});
for(var i=0;i<danmu_chunk.length;i++)
apply_item(danmu_chunk[i]);
//setbadge((
//        POPUP_BADGE=='count' ? ''+counter :
//        POPUP_BADGE=='percent' ? (danmus.length ? (counter*100/danmus.length).toFixed(0)+'%' : '0%') :
//        ''
//    ),SUCCESS_COLOR,tabid
//);
//chrome.browserAction.setTitle({
//    title: '已过滤 '+counter+'/'+danmus.length+' 弹幕',
//    tabId: tabid
//});
var serializer=new XMLSerializer();
console.timeEnd('parse');
return [serializer.serializeToString(new_dom), new_dom];
}
// Hijacking XMLHttpRequest to make this script work
WINDOW = window;
if(WINDOW._fts_xhr)return;
WINDOW._fts_xhr = WINDOW.XMLHttpRequest;
WINDOW.XMLHttpRequest = function() {
//cannot use apply directly since we want a 'new' version
var wrapped = new(Function.prototype.bind.apply(WINDOW._fts_xhr, arguments));
wrapped.addEventListener("readystatechange", function () {
var r;
try{
if(wrapped.readyState == 4) {
//console.log(wrapped);
if( wrapped.responseURL.match(/^(https:|http:|)?(\/\/)?comment.bilibili.com\/.*\.xml/)) {
console.log("processing danmoku", wrapped);
r = parse(wrapped.response, 0);
Object.defineProperty(wrapped, 'responseText', {
writable: true
});
Object.defineProperty(wrapped, 'responseXML', {
writable: true
});
Object.defineProperty(wrapped, 'response', {
writable: true
});
wrapped.responseXML = r[1];
wrapped.responseText = r[0];
wrapped.response = r[0];
}
}
} catch(e) {
console.log(e, r);
}
});
//*/
return wrapped;
};
console.log("r1 loaded");
})();