Show line numbers next to code in question
// ==UserScript==
// @name SO - Code line nums
// @namespace http://mdev.me/
// @description Show line numbers next to code in question
// @include http://*stackoverflow.com/questions/*
// @version 6
// @grant none
// ==/UserScript==
var styles = document.createElement('link');
styles.rel = 'stylesheet';
styles.type = 'text/css';
styles.href = 'http://mdev.me/SOcln.css';
document.querySelector('head').appendChild(styles);
var initLines = function() {
var codeBlocks = N('body').findAll('#question pre, .answer pre, .wmd-preview pre');
O(codeBlocks).loop(function(n){
n = N(n);
if(n.hasClass('mdevLinesEnabled') || n.hasClass('mdevLinesDisabled'))
{
n.removeClass('mdevLinesEnabled');n.removeClass('mdevLinesDisabled');
N(n.find('.mdevLineBox')).remove();
N(n.find('.mdevLinesToggle')).remove();
n.n.style.paddingLeft = '';
}
n.n.style.position = 'relative';
var codeEl = n.find("code");
if(!codeEl) return;
var codeH = codeEl.offsetHeight;
var span = N(codeEl).find("span");
var spanH = 17;
var lineNoOffset = 1;
if(span)
{
spanH = span.offsetHeight;
var spanLines = span.innerHTML.match(/\r?\n/g);
spanLines = spanLines ? spanLines.length+1 : 1;
spanH = spanH/spanLines;
if(N(span).find('span')) span = N(span).find('span');
var m = null
if(m = span.innerHTML.match(/^#Line:(\d+)/))
{
lineNoOffset = D(m[1]).toInt();
}
}
else
{
spanH = parseInt(N(codeEl).getCompStyle('lineHeight'));
if(m = codeEl.innerHTML.match(/^#Line:(\d+)/))
{
lineNoOffset = D(m[1]).toInt();
}
}
var firstSpan = N(codeEl).find("span");
var lastSpan = N(codeEl).findAll("span");
lastSpan = lastSpan[lastSpan.length-1];
var lines = Math.floor(codeH/spanH);
if(firstSpan.innerHTML.match(/^\s*\r?\n\s*$/)) lines++;
if(lastSpan.innerHTML.match(/^\s*\r?\n\s*$/)) lines++;
if(lines>5)
{
n.addClass('mdevLinesEnabled');
var lineBox = document.createElement('div');
lineBox.className = 'mdevLineBox';
lineBox.style.visibility = 'hidden';
var lineNosAdded = 0;
while(lineNosAdded<lines && lineNosAdded<200)
{
var lineNo = document.createElement('span');
lineNo.className = 'mdevLineNo';
lineNo.innerHTML = lineNosAdded+lineNoOffset;
lineBox.appendChild(lineNo);
lineNosAdded++;
}
n.n.appendChild(lineBox);
var linesToggle = document.createElement('div');
linesToggle.className = 'mdevLinesToggle';
linesToggle.innerHTML = '#L';
linesToggle.style.cursor = 'pointer';
n.n.appendChild(linesToggle);
disableSelection(linesToggle);
addEvent(linesToggle,'click',function(e){
var toggleLines = function(showHide){
var pre = N(this).parent();
var box = N(this).prev('div','mdevLineBox');
var show = df(showHide,'string')&&showHide=='show';
var hide = df(showHide,'string')&&showHide=='hide';
var override = show||hide;
show = (override&&show) || (!override&&N(box).getCompStyle('visibility')!='visible');
hide = (override&&hide) || (!override&&N(box).getCompStyle('visibility')=='visible');
if(show)
{
pre.style.paddingLeft = box.offsetWidth+10+"px";
box.style.visibility = 'visible';
}
else if(hide)
{
pre.style.paddingLeft = "5px";
box.style.visibility = 'hidden';
}
}
var disable = function() {
var pre = N(this).parent();
toggleLines.call(this,'hide');
N(pre).removeClass('mdevLinesEnabled');
N(pre).addClass('mdevLinesDisabled');
}
if(e.shiftKey)
{
var show = N(N(this).prev('div','mdevLineBox')).getCompStyle('visibility')!='visible';
O(N('#question').findAll('pre.mdevLinesEnabled')).loop(function(pre) {
var that = N(pre).find('.mdevLinesToggle');
if(e.ctrlKey) disable.call(that);
else toggleLines.call(that,show?'show':'hide');
})
}
else if(e.ctrlKey)
{
disable.call(this);
}
else toggleLines.call(this);
})
}
});
}
var initScript = function() {
addEvent(window,'load',function() {
initLines();
})
}
function disableSelection(target)
{
if (typeof target.onselectstart!="undefined")
target.onselectstart=function(){return false}
else if (typeof target.style.MozUserSelect!="undefined")
target.style.MozUserSelect="none"
else
target.onmousedown=function(){return false}
target.style.cursor = "default"
}
var scriptTag = document.createElement('script');
scriptTag.type = 'text/javascript';
scriptTag.src = 'https://greasyfork.org/scripts/1780-so-code-line-nums-prot-min-js-utility/code/SO%20-%20Code%20line%20nums%20%28protminjs%20utility%29.js';
scriptTag.onreadystatechange=function(){if(this.readyState=='complete')initScript();}
scriptTag.onload = initScript;
document.body.appendChild(scriptTag);
window.initLines = initLines;