slauncher.js

/* md5.js - MD5 Message-Digest
 * Copyright (C) 1999,2002 Masanao Izumo <iz@onicos.co.jp>
 * Version: 2.0.0
 * LastModified: May 13 2002
 *
 * This program is free software.  You can redistribute it and/or modify
 * it without any warranty.  This library calculates the MD5 based on RFC1321.
 * See RFC1321 for more information and algorism.
 */

/* Interface:
 * md5_128bits = MD5_hash(data);
 * md5_hexstr = MD5_hexhash(data);
 */

/* ChangeLog
 * 2002/05/13: Version 2.0.0 released
 * NOTICE: API is changed.
 * 2002/04/15: Bug fix about MD5 length.
 */


//    md5_T[i] = parseInt(Math.abs(Math.sin(i)) * 4294967296.0);
var MD5_T = new Array(0x00000000, 0xd76aa478, 0xe8c7b756, 0x242070db,
		      0xc1bdceee, 0xf57c0faf, 0x4787c62a, 0xa8304613,
		      0xfd469501, 0x698098d8, 0x8b44f7af, 0xffff5bb1,
		      0x895cd7be, 0x6b901122, 0xfd987193, 0xa679438e,
		      0x49b40821, 0xf61e2562, 0xc040b340, 0x265e5a51,
		      0xe9b6c7aa, 0xd62f105d, 0x02441453, 0xd8a1e681,
		      0xe7d3fbc8, 0x21e1cde6, 0xc33707d6, 0xf4d50d87,
		      0x455a14ed, 0xa9e3e905, 0xfcefa3f8, 0x676f02d9,
		      0x8d2a4c8a, 0xfffa3942, 0x8771f681, 0x6d9d6122,
		      0xfde5380c, 0xa4beea44, 0x4bdecfa9, 0xf6bb4b60,
		      0xbebfbc70, 0x289b7ec6, 0xeaa127fa, 0xd4ef3085,
		      0x04881d05, 0xd9d4d039, 0xe6db99e5, 0x1fa27cf8,
		      0xc4ac5665, 0xf4292244, 0x432aff97, 0xab9423a7,
		      0xfc93a039, 0x655b59c3, 0x8f0ccc92, 0xffeff47d,
		      0x85845dd1, 0x6fa87e4f, 0xfe2ce6e0, 0xa3014314,
		      0x4e0811a1, 0xf7537e82, 0xbd3af235, 0x2ad7d2bb,
		      0xeb86d391);

var MD5_round1 = new Array(new Array( 0, 7, 1), new Array( 1,12, 2),
			   new Array( 2,17, 3), new Array( 3,22, 4),
			   new Array( 4, 7, 5), new Array( 5,12, 6),
			   new Array( 6,17, 7), new Array( 7,22, 8),
			   new Array( 8, 7, 9), new Array( 9,12,10),
			   new Array(10,17,11), new Array(11,22,12),
			   new Array(12, 7,13), new Array(13,12,14),
			   new Array(14,17,15), new Array(15,22,16));

var MD5_round2 = new Array(new Array( 1, 5,17), new Array( 6, 9,18),
			   new Array(11,14,19), new Array( 0,20,20),
			   new Array( 5, 5,21), new Array(10, 9,22),
			   new Array(15,14,23), new Array( 4,20,24),
			   new Array( 9, 5,25), new Array(14, 9,26),
			   new Array( 3,14,27), new Array( 8,20,28),
			   new Array(13, 5,29), new Array( 2, 9,30),
			   new Array( 7,14,31), new Array(12,20,32));

var MD5_round3 = new Array(new Array( 5, 4,33), new Array( 8,11,34),
			   new Array(11,16,35), new Array(14,23,36),
			   new Array( 1, 4,37), new Array( 4,11,38),
			   new Array( 7,16,39), new Array(10,23,40),
			   new Array(13, 4,41), new Array( 0,11,42),
			   new Array( 3,16,43), new Array( 6,23,44),
			   new Array( 9, 4,45), new Array(12,11,46),
			   new Array(15,16,47), new Array( 2,23,48));

var MD5_round4 = new Array(new Array( 0, 6,49), new Array( 7,10,50),
			   new Array(14,15,51), new Array( 5,21,52),
			   new Array(12, 6,53), new Array( 3,10,54),
			   new Array(10,15,55), new Array( 1,21,56),
			   new Array( 8, 6,57), new Array(15,10,58),
			   new Array( 6,15,59), new Array(13,21,60),
			   new Array( 4, 6,61), new Array(11,10,62),
			   new Array( 2,15,63), new Array( 9,21,64));

function MD5_F(x, y, z) { return (x & y) | (~x & z); }
function MD5_G(x, y, z) { return (x & z) | (y & ~z); }
function MD5_H(x, y, z) { return x ^ y ^ z;          }
function MD5_I(x, y, z) { return y ^ (x | ~z);       }

var MD5_round = new Array(new Array(MD5_F, MD5_round1),
			  new Array(MD5_G, MD5_round2),
			  new Array(MD5_H, MD5_round3),
			  new Array(MD5_I, MD5_round4));

function MD5_pack(n32) {
  return String.fromCharCode(n32 & 0xff) +
	 String.fromCharCode((n32 >>> 8) & 0xff) +
	 String.fromCharCode((n32 >>> 16) & 0xff) +
	 String.fromCharCode((n32 >>> 24) & 0xff);
}

function MD5_unpack(s4) {
  return  s4.charCodeAt(0)        |
	 (s4.charCodeAt(1) <<  8) |
	 (s4.charCodeAt(2) << 16) |
	 (s4.charCodeAt(3) << 24);
}

function MD5_number(n) {
  while (n < 0)
    n += 4294967296;
  while (n > 4294967295)
    n -= 4294967296;
  return n;
}

function MD5_apply_round(x, s, f, abcd, r) {
  var a, b, c, d;
  var kk, ss, ii;
  var t, u;

  a = abcd[0];
  b = abcd[1];
  c = abcd[2];
  d = abcd[3];
  kk = r[0];
  ss = r[1];
  ii = r[2];

  u = f(s[b], s[c], s[d]);
  t = s[a] + u + x[kk] + MD5_T[ii];
  t = MD5_number(t);
  t = ((t<<ss) | (t>>>(32-ss)));
  t += s[b];
  s[a] = MD5_number(t);
}

function MD5_hash(data) {
  var abcd, x, state, s;
  var len, index, padLen, f, r;
  var i, j, k;
  var tmp;

  state = new Array(0x67452301, 0xefcdab89, 0x98badcfe, 0x10325476);
  len = data.length;
  index = len & 0x3f;
  padLen = (index < 56) ? (56 - index) : (120 - index);
  if(padLen > 0) {
    data += "\x80";
    for(i = 0; i < padLen - 1; i++)
      data += "\x00";
  }
  data += MD5_pack(len * 8);
  data += MD5_pack(0);
  len  += padLen + 8;
  abcd = new Array(0, 1, 2, 3);
  x    = new Array(16);
  s    = new Array(4);

  for(k = 0; k < len; k += 64) {
    for(i = 0, j = k; i < 16; i++, j += 4) {
      x[i] = data.charCodeAt(j) |
	    (data.charCodeAt(j + 1) <<  8) |
	    (data.charCodeAt(j + 2) << 16) |
	    (data.charCodeAt(j + 3) << 24);
    }
    for(i = 0; i < 4; i++)
      s[i] = state[i];
    for(i = 0; i < 4; i++) {
      f = MD5_round[i][0];
      r = MD5_round[i][1];
      for(j = 0; j < 16; j++) {
	MD5_apply_round(x, s, f, abcd, r[j]);
	tmp = abcd[0];
	abcd[0] = abcd[3];
	abcd[3] = abcd[2];
	abcd[2] = abcd[1];
	abcd[1] = tmp;
      }
    }

    for(i = 0; i < 4; i++) {
      state[i] += s[i];
      state[i] = MD5_number(state[i]);
    }
  }

  return MD5_pack(state[0]) +
	 MD5_pack(state[1]) +
	 MD5_pack(state[2]) +
	 MD5_pack(state[3]);
}

function MD5_hexhash(data) {
    var i, out, c;
    var bit128;

    bit128 = MD5_hash(data);
    out = "";
    for(i = 0; i < 16; i++) {
	c = bit128.charCodeAt(i);
	out += "0123456789abcdef".charAt((c>>4) & 0xf);
	out += "0123456789abcdef".charAt(c & 0xf);
    }
    return out;
}

/* utf.js - UTF-8 <=> UTF-16 convertion
 *
 * Copyright (C) 1999 Masanao Izumo <iz@onicos.co.jp>
 * Version: 1.0
 * LastModified: Dec 25 1999
 * This library is free.  You can redistribute it and/or modify it.
 */

/*
 * Interfaces:
 * utf8 = utf16to8(utf16);
 * utf16 = utf16to8(utf8);
 */

function utf16to8(str) {
    var out, i, len, c;

    out = "";
    len = str.length;
    for(i = 0; i < len; i++) {
	c = str.charCodeAt(i);
	if ((c >= 0x0001) && (c <= 0x007F)) {
	    out += str.charAt(i);
	} else if (c > 0x07FF) {
	    out += String.fromCharCode(0xE0 | ((c >> 12) & 0x0F));
	    out += String.fromCharCode(0x80 | ((c >>  6) & 0x3F));
	    out += String.fromCharCode(0x80 | ((c >>  0) & 0x3F));
	} else {
	    out += String.fromCharCode(0xC0 | ((c >>  6) & 0x1F));
	    out += String.fromCharCode(0x80 | ((c >>  0) & 0x3F));
	}
    }
    return out;
}

function utf8to16(str) {
    var out, i, len, c;
    var char2, char3;

    out = "";
    len = str.length;
    i = 0;
    while(i < len) {
	c = str.charCodeAt(i++);
	switch(c >> 4)
	{ 
	  case 0: case 1: case 2: case 3: case 4: case 5: case 6: case 7:
	    // 0xxxxxxx
	    out += str.charAt(i-1);
	    break;
	  case 12: case 13:
	    // 110x xxxx   10xx xxxx
	    char2 = str.charCodeAt(i++);
	    out += String.fromCharCode(((c & 0x1F) << 6) | (char2 & 0x3F));
	    break;
	  case 14:
	    // 1110 xxxx  10xx xxxx  10xx xxxx
	    char2 = str.charCodeAt(i++);
	    char3 = str.charCodeAt(i++);
	    out += String.fromCharCode(((c & 0x0F) << 12) |
					   ((char2 & 0x3F) << 6) |
					   ((char3 & 0x3F) << 0));
	    break;
	}
    }

    return out;
}

/**
 * Social Launcher
 */


var slauncher_content;
var slauncher_map = {};

function slauncher_searchtag(json) {
    var flag = false;
    for (var item,i = 0; item = json[i]; i ++) {
	var tlist = item.t;
	for (var tag,t = 0; tag = tlist[t]; t ++) {
	    if (tag.match(/^id:.*/)) {
		if (!flag) {
		    slauncher_content.innerHTML = "<b>Social Launcher</b><br />";
		}
		flag = true;
		var url = "http://feeds.delicious.com/v2/json/tag/" + tag + "?count=50&callback=slauncher_showlink";
		var s = document.createElement("script");
		s.type = "text/javascript";
		s.src = url;
		document.body.appendChild(s);
	    }
	}
    }
    if (!flag) {
	slauncher_content.innerHTML = "<b>Social Launcher</b><br />There is no link found.";
    }
}

function slauncher_showlink(json) {
    // 枠を用意
    for (var item,i = 0; item = json[i]; i ++) {
	if (slauncher_map[item.u]) {
	    continue;
	}
	var base = item.u.match(/^(\w+):\/\/([^\/:]+)(:\d*)?/);
	base = RegExp.$2;
	var atag = document.createElement("a");
	atag.setAttribute("href", item.u);
	var img = document.createElement("img");
	img.setAttribute("src", "http://" + base + "/favicon.ico");
	img.setAttribute("border", "0");
	atag.appendChild(img);
	atag.appendChild(document.createTextNode(item.d));
	slauncher_content.appendChild(atag);
	alauncher_content.appendChild(document.createElement("br"));
	slauncher_map[item.u] = {}; // 空オブジェクトをセット
    }
}

// 起動スクリプト
(function() {
    var cid = "socialauncher-content"
    slauncher_content = document.getElementById(cid);
    if (slauncher_content == null) {
	//document.open();
	slauncher_content = document.createElement("div");
	slauncher_content.style.position = "absolute";
	slauncher_content.style.top = "10px";
	slauncher_content.style.left = "10px";
	slauncher_content.style.backgroundColor = "#ffffff";
	slauncher_content.style.color = "#000000";
	slauncher_content.style.border = "solid #0000ff";
	slauncher_content.style.zIndex = "999";
	slauncher_content.style.textAlign = "left";
	slauncher_content.id = cid;
	slauncher_content.innerHTML = "<b>Social Launcher</b><br />Loading..";
	document.body.appendChild(slauncher_content);
	// MD5値を用意 (TODO:Canonicalizeが必要)
	var target = utf16to8(document.location.href);
	var hash = MD5_hexhash(target);
	// タグを検索
	var url = "http://feeds.delicious.com/v2/json/url/" + hash + "?count=50&callback=slauncher_searchtag";
	var s = document.createElement("script");
	s.type = "text/javascript";
	s.src = url;
	document.body.appendChild(s);
    } else {
	// すでに表示されている場合は隠す
	if (slauncher_content.style.display == "none") {
	    slauncher_content.style.display = "block";
	} else {
	    slauncher_content.style.display = "none";
	}
    }
})();