☰

Y-marker

save/restore webpage scroll Y position

目前为 2014-03-31 提交的版本。查看 最新版本。

  1. // ==UserScript==
  2. // @name        Y-marker
  3. // @namespace   trespassersW
  4. // @description save/restore webpage scroll Y position
  5. // @include        http://*
  6. // @include        https://*
  7. // @include        file://*
  8. // @exclude http*://www.google.com/reader/*
  9. // @version 1.2
  10. // @updated  2013-12-12
  11. // @released 2013-12-11
  12. // @run-at document-end
  13. // @grant GM_log
  14. // ==/UserScript==
  15. /* 13-12-13 cosmetics
  16.  * 13-12-12 click on msg removes all marks
  17.  * 1.1 don't run in editable fields
  18.  *
  19. */
  20. (function(){ "use strict";
  21. if(top!=self || !document || !document.body ) return;
  22. var W = typeof unsafeWindow != "undefined" ? unsafeWindow : window;
  23. /* key kombinations to invoke the skript */
  24. var kShift = 1,  kCtrl = 2, kAlt = 4, kWin = 8;
  25. var kJump = 0; 
  26. var kMark = kAlt;
  27.  
  28. /* sec; 0 to disable; -1 status bar only */
  29. var tipShowtime = 2.2;  
  30.  
  31. var kNobs = "-0123456789";
  32. var kKeys = { 
  33.  173: 0, 48: 1, 49: 2, 50: 3, 51: 4, 52: 5, 53: 6, 54: 7, 55: 8, 56: 9, 57: 10,
  34.  189: 0, /* chrome, opera caps lock */
  35.  109: 0  /* opera */
  36. };
  37. var minus1="-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1";
  38.  
  39. function kNob(k){ return kNobs.charAt(k); }
  40.  
  41. var U=undefined, D=W.document;
  42. function _L(s) { 0 && console.log(s) };
  43.  
  44. var statMsg;
  45. function msg(t,k, y){
  46.  statMsg = "";
  47.  if(U!==k)
  48.   statMsg += "["+kNob(k)+"] ";
  49.  if(U!==y)
  50.   statMsg += ""+pt(y)+"% ";
  51.  statMsg += t+ (noCoo ? "\u2262 ": "");
  52. }
  53.  
  54. var locStor;
  55. var noCoo;
  56. // see SQlite manager -> %FFpath%\webappstore.sqlite -> find -> key -> contains Ym#
  57.  
  58. if(!locStor) try {
  59.   locStor = W.localStorage;
  60.   locStor.getItem("Ym#");
  61. } catch(e){ locStor =null;  };
  62.  
  63. if(!locStor) try {
  64.   noCoo="no cookies!!1";
  65.   locStor = W.sessionStorage;
  66.   locStor.getItem("Ym#");
  67. } catch(e){ locStor =null };
  68.  
  69. if(!locStor && U===W.YmStorage){
  70.   noCoo= "cookies are disabled!!!11";
  71.   W.YmStorage= { 
  72.   setItem: function(k,v) {this.s[k]=v},
  73.   getItem: function(k) {return this.s[k]? this.s[k]: null},
  74.   removeItem: function(k) {this.s[k]=null},
  75.   s: {}
  76.  };
  77.  locStor=W.YmStorage;
  78. }
  79.  
  80. function pt(y) {
  81.  try{
  82.   y =Math.round(y*1000/(document.body.scrollHeight+1))/10;
  83.  }catch(e){console.log("math\n"+e); return -1}
  84.  return y;
  85. }
  86.  
  87. var Ym;
  88. var pz;
  89.  
  90. function ldYm(){
  91.   var s= locStor.getItem(Ym);
  92.   if(!s) s=minus1;
  93.   pz=s.split(",")
  94. }
  95.  
  96. function svYm(){
  97.  var s=pz.join(",");
  98.  locStor.setItem(Ym,s)
  99. }
  100.  
  101. function jumpY(k){
  102.  var y=pz[k];
  103.  if(y > -1) {
  104.    if( y!= scrollY ){
  105.     pz[0] = scrollY;
  106.     scroll(0,y);
  107.     msg("jump",k,y);
  108.    }else
  109.     msg("here",k,y); 
  110.    return 1;
  111.  }
  112.  msg("none",k); 
  113.  return 0;
  114. }
  115.  
  116. function markY(k){
  117.  pz[k]=scrollY;
  118.  if(k>=1)
  119.   svYm();
  120.  msg("mark",k,pz[k]);
  121.  return 1;
  122. }
  123.  
  124. var kMap= {16: kShift, 17:kCtrl, 18: kAlt, 91: kWin};
  125. var keyMod=0;
  126. var kkWin= (kMark | kJump) & kWin;
  127.  
  128. function klear(e) { 
  129.  var k= e.keyCode; 
  130.  if(!k) return;
  131.  var km=kMap[k];
  132.  if(km) {
  133.   keyMod &= -1 ^ km;
  134.  }
  135. }
  136.  
  137. function onKeydown(e) {
  138.  var rc=0, k= e.keyCode; 
  139.  if(!k) return;
  140.  // Don't run in input, select, textarea etc.
  141.  var E = D.activeElement.tagName.toLowerCase();
  142.  if (E == "input" || E == "select" || E == "textarea" ||
  143.     (E=D.activeElement.contentEditable) == "true" ||
  144.      E == "") 
  145.    {  keyMod = 0; return; }
  146.  
  147.  var km =kMap[k]; // ff doesnt track metaKey. stsuko
  148.  if(km) {
  149.    keyMod |= km;
  150.    if( kkWin && km === kWin ) //???
  151.     e.preventDefault(), e.stopPropagation();
  152.    return;
  153.  }
  154.  km=keyMod; 
  155.  if( U=== (k=kKeys[k]) ){ keyMod = 0; return; }
  156.  if( km === kJump ) {
  157.    rc = jumpY(k);
  158.  }else if( km === kMark ) {
  159.    rc = markY(k);
  160.  }else {
  161.   return;
  162.  }
  163.  statSay();
  164.  if(rc) e.preventDefault(),e.stopPropagation();
  165. }
  166.  
  167. function mk(p, t, s, h) {
  168.   var e = D.createElement(t);
  169.   e.style.cssText = s;
  170.   p.appendChild(e);
  171.   if (h) e.innerHTML = h;
  172.   return e
  173. };
  174.  
  175. /* RIP status bar replacement */
  176. var sb = mk(D.body, 'div', 
  177. "position: fixed;\
  178. top: 0px; right: 1px; bottom: auto; left: auto;\
  179. background: rgba(221,255,221,.75);\
  180. padding: 2px 3px 2px 8px; margin:0;\
  181. border: none;\
  182. border-radius: 12px 3px 3px 12px; \
  183. color: #131;\
  184. opacity: 1; display: none;\
  185. z-index: 2147483647;\
  186. font: normal 12px/14px sans-serif !important;\
  187. text-shadow: #373 2px 2px 4px, #7F7 -2px -2px 4px;\
  188. cursor:no-drop;\
  189. "
  190. );
  191.  
  192. var tO;
  193. function onTout(){
  194.  tO=0; sb.style.display="none";
  195. }
  196. function noTout(){ 
  197.  if(tO) clearTimeout(tO), onTout();
  198. }
  199.  
  200. function statSay(t) {
  201.  if(statMsg){
  202.    if(tipShowtime) 
  203.      W.status=statMsg;
  204.    if(tipShowtime>0){
  205.      noTout();
  206.      sb.innerHTML= statMsg;
  207.      sb.style.display="block";
  208.      tO=setTimeout(onTout, (t? t: tipShowtime)*1000);
  209.    }
  210.  } 
  211.  statMsg="";
  212. }
  213.  
  214. Ym="Ym#"+location.pathname;
  215. _L("load: "+location+"\n >> "+Ym);
  216.  
  217. ldYm();
  218. for(var k=1; k<2; k++){ /* pz.length */
  219.  if(pz[k]>-1){ 
  220.   scroll(0,pz[k]); 
  221.   msg('jump',k,pz[k]);
  222.   statSay(5);
  223.   break; 
  224.  }
  225. };
  226. /* click removes all  */
  227. if(tipShowtime>0){
  228.  sb.addEventListener("click",function (e) {
  229.   locStor.removeItem(Ym);
  230.   ldYm(); noTout();
  231.  },false);
  232. };
  233.  
  234. if(noCoo)  msg(noCoo),   statSay(7);
  235.  console.log('xyu');
  236. W.addEventListener("keydown",onKeydown,false);
  237. W.addEventListener("keyup",klear,false);
  238.  
  239. })();