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Title:

JK Scrolling

Date Added:

2010-03-06 10:37:52

Installs:

349

Description:

Scroll through website items using the J and K keys!
Select 'enable JKS' and 'stop JKS' User Script Commands from the IEPro menu. On enabling, all links on a page will turn orange. Move the cursor over a link to see which elements are proposed as JK Scrolling candidates. Click on a link to finalize the process. You can now scroll through items on the page with the J and K keys. You only have to initialize the script once per domain.
To temporarily disable the script (for example, when you need to type something on a page), press CTRL twice. Pressing it another two times will re-enable JK Scrolling.

Note #1: This is an experimental script! Although all websites are supported in theory, some will not work. Feedback is appreciated!

Note #2: JK Scrolling has no affiliation with the Harry Potter© book series or its author.

Preview of JK Scrolling

View script source of JK Scrolling

// ==UserScript==
// @name         JK Scrolling
// @description  Scroll through website items using the J and K keys. Select 'enable JKS' and 'stop JKS' User Script Commands from the IEPro menu. On enable, all links (except image links) on a page will turn orange. Move the cursor over a link to see which elements are proposed as JK Scrolling candidates. Click on a link to finalize the process. You can now scroll through items on the page with the J and K keys. You only have to initialize the script once per domain. To temporarily disable the script (for example, when you need to type something on a page), press CTRL twice. Pressing it another two times will re-anable JK Scrolling.
// @include      *
// @author       Protector one
// @date         6 March 2010
// @version      1.1
// ==/UserScript==

if (window.JKS_firstRun == undefined)
(function(){
  var abc = 'ZABCDEFGHIJKLMNOPQRSTUVWXY';
  function press(event){
    if (event.keyCode == 17){
      if (ctrl){
        ctrl = false;
        JKS_enabled = !JKS_enabled;
        location = JKS_enabled? '#JKS_re-enabled': '#JKS_paused';
      }else{
        ctrl = true;
        setTimeout(function(){ctrl = false;},500);
      }
    }else if (JKS_enabled && event.keyCode in {74:1,75:1}){
      if (total < 1)
        alert('No links found! Maybe you should reset JK Scrolling?');
      else{
        if (event.keyCode == 74){
          if (++current > total){
            increase(1)
            --current;
            return;
          }
        }else
          current = Math.max(1,current-1);
        location = '#JKS_'+letters(current);
        PRO_registerMenuCommand('Stop JK Scrolling on '+host,stop);
      }
    }
  }
  function increase(x){
    var matches = location.href.match(/(.+?)([0-9]+?)([^0-9]*?)$/i);
    if (!matches)
      return;
    var diff, nin = parseInt(matches[2],10)+x;
    if (nin<0) nin += 10;
    nin += '';
    if ((diff = matches[2].length - nin.length) > 0) nin = Array(diff+1).join('0') + nin;
    location = matches[1]+nin+matches[3];
  }
  function letters(index){
    var q, i = -1, result = '';
    while (index > ((q = Math.pow(26,++i))-1))
      result = abc.charAt(index % (26*q) / q) + result;
    return result;
  }
  function numbers(index){
    var i, result = 0;
    for (i=0; i<index.length; ++i)
      result += abc.search(index.charAt(index.length-1-i)) * Math.pow(26,i);
    return result;
  }
  function stop(){
    PRO_setValue('JKS_'+host,'');
    var newloc = location.href.match(/^[^#]+/)[0];
    location.href = newloc + (newloc.match(/\?/)? '&': '?') +
      'JKS_stopped=1';
  }
  function setup(){
    var i, j, el, par, z, same, div, style, currentLetters,
        classMode = false,
        treeList = tree.split('_');
    total = 0;
    if (currentLetters = location.hash.match(/^#JKS_([A-Z]+)$/))
      current = numbers(currentLetters[1]);
    else
      location.hash = 'JKS_enabled';
    PRO_registerMenuCommand('Stop JK Scrolling on '+host,stop);
    if (tree.match(/^class_/)){
      classMode = true;
      var classNameX = tree.split('_JKS_').slice(1).join(' ');
    }
    for (i=0, j=document.links.length; i<j; ++i){
      el = document.links[i];
      if (classMode){
        if (!el.className || !el.className.match(classNameX))
          continue;
      }else{
        same = true;
        z = -1;
        etree = [];
        par = el.parentNode;
        while (par && par.tagName){
          if (++z+1 > treeList.length || par.tagName != treeList[z]){
            same = false;
            break;
          }
          par = par.parentNode;
        }
        if (!same)
          continue;
      }
      el.id = 'JKS_'+letters(++total);
    }
    document.attachEvent('onkeyup', press);
  }
  function init(){
    var i, j, el, etree;
    window.JKS_styles = {};
    for (i=0, j=document.links.length; i<j; ++i){
      el = document.links[i];
      if (el.className)
        etree = 'class_JKS_'+el.className.replace(' ','_JKS_');
      else{
        etree = [];
        par = el.parentNode;
        while (par && par.tagName){
          etree.push(par.tagName);
          par = par.parentNode;
        }
        etree = etree.join('_');
      }
      if (!(etree in JKS_styles)){
        PRO_addStyle('.JKS_'+etree+':link {color:orange !important} .JKS_'+
          etree+':hover {color:blue !important}');
        JKS_styles[etree] = document.styleSheets.length-1;
      }
      if (el.className){
        el.className += ' JKS_'+etree;
      }else
        el.className = 'JKS_'+etree;
      el.attachEvent('onclick',getSetter(etree));
      el.attachEvent('onmouseover',toggleStyle);
      el.attachEvent('onmouseout',toggleStyle);
    }
  }
  function toggleStyle(){
    var el = event.srcElement;
    while (el.tagName != 'A' && el.parentNode)
      el = el.parentNode;
    var cname = el.className.split(' ');
    cname = cname[cname.length-1].slice(4);
    document.styleSheets[JKS_styles[cname]].disabled = 
      !document.styleSheets[JKS_styles[cname]].disabled;
  }
  function getSetter(etree){
    return function(){
      for (var k in JKS_styles)
        document.styleSheets[JKS_styles[k]].cssText = '';
      PRO_setValue('JKS_'+host,etree);
      tree = etree;
      for (var i=0, j=document.links.length; i<j; ++i){
        document.detachEvent('onclick',document.links[i]);
        document.detachEvent('onmouseover',document.links[i]);
        document.detachEvent('onmouseout',document.links[i]);
      }
      setup();
      return false;
    }
  }
  window.JKS_firstRun = false;
  window.JKS_enabled = true;
  var tree, total,
      current = 0,
      ctrl = false,
      host = location.host;
  (function(){
    if (host.match(/^www./))
      host = host.slice(4);
    if (!(tree = PRO_getValue('JKS_'+host)))
      PRO_registerMenuCommand('Enable JK Scrolling on '+host, init);
    else
      setup();
  })();
})();

Comment of JK Scrolling

	[2010-03-06 08:12:46]Protector0ne says:
	Version 1.1 fixes the problem where holding ctrl will constantly enable/disable JK Scrolling, and introduces memory. (I.e., going back to a page where JKS was used, it will be at the point where it was before leaving the page.)

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Written by


Name:	Protector0ne
Scripts:	19
Styles:	1
Plugins:	0
Tags

Shortcut, keys, j, k, scrolling, navigation

About IE7Pro
IE7Pro is a plugin for the Internet Explorer web browser. It allows you to change how your favorite pages behave and look. There are many scripts that have already been written, and if you know javascript you can easily create your own! This site is a repository to download and install IE user scripts.
How to install user script
1 . First you should have install IE7Pro 0.9.12 and above which support IE user scripts. 2. Check if IE7Pro "Preference" - "User Scripts" - "EnabLe User Script" is enabled. 3. Find your favorite scripts on iescripts.org and click "Install This Script" .

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