Wikipedia:WikiProject User scripts/Scripts/Single column diffs

//

// By User:Pile0nades.
// Makes the diff page display as a single column, instead of two.
addOnloadHook(function(){
// ==UserScript==
// @name Wikipedia single column diffs
// @namespace http://mywebsite.com/myscripts
// @description Make Wikipedia diff pages read like patch-format diffs, only one column needed
// @include http://en.wikipedia.org/w/index.php?*&diff=*
// ==/UserScript==
// remove the header for the previous revision, and add the next/prev links to the second header
var prevHeader = get("//table[@class='diff'][1]/tbody/tr[1]/td[@class='diff-otitle']");
var nextHeader = get("//table[@class='diff'][1]/tbody/tr[1]/td[@class='diff-ntitle']");
var oldedit = get("//table[@class='diff'][1]/tbody/tr[1]/td[@class='diff-otitle']/a[@id='differences-prevlink']");
var newedit = get("//table[@class='diff'][1]/tbody/tr[1]/td[@class='diff-ntitle']/a[@id='differences-nextlink']");
for(var i = 0; i < prevHeader.snapshotLength; i++) {
 if(oldedit.snapshotLength != 0) {
 nextHeader.snapshotItem(i).appendChild(oldedit.snapshotItem(0));
 }
 if(oldedit.snapshotLength != 0 && newedit.snapshotLength != 0) {
 nextHeader.snapshotItem(i).appendChild(document.createTextNode(" | "));
 }
 if(newedit.snapshotLength != 0) {
 nextHeader.snapshotItem(i).appendChild(newedit.snapshotItem(0));
 }
 remove(prevHeader.snapshotItem(i));
}
// clone rows where the line changed but wasn't added/deleted, and delete where appropriate
var changedLines = get("//table[@class='diff'][1]/tbody/tr/td[@class='diff-addedline' and position()=4]/../td[@class='diff-deletedline' and position()=2]")
for(var i = 0; i < changedLines.snapshotLength; i++) {
 var cell = changedLines.snapshotItem(i);
 cell.parentNode.parentNode.insertBefore(
 cell.parentNode.cloneNode(true),
 cell.parentNode
 );
 remove(cell.previousSibling.previousSibling);
 remove(cell);
}
// delete blank cells in the first column to move the added lines into the first column
var blankcells = get("//table[@class='diff'][1]/tbody/tr/td[1]");
for(var i = 0; i < blankcells.snapshotLength; i++) {
 if(blankcells.snapshotItem(i).innerHTML == " ") {
 remove(blankcells.snapshotItem(i));
 }
}
// delete everything past the second td in each column
var waste = get("//table[@class='diff'][1]/tbody/tr/td[2]");
for(var i = 0; i < waste.snapshotLength; i++) {
 while(waste.snapshotItem(i).nextSibling) {
 remove(waste.snapshotItem(i).nextSibling);
 }
}
// delete the 2nd line number cell in each column
var line = get("//table[@class='diff'][1]/tbody/tr/td[@class='diff-lineno'][1]");
for(var i = 0; i < line.snapshotLength; i++) {
 remove(line.snapshotItem(i));
}
// delete the extra cols
var cols = get("//table[@class='diff'][1]/col");
for(var i = 0; i < cols.snapshotLength; i++) {
 var col = cols.snapshotItem(i);
 if(col.className == "diff-content") {
 col.style.width = "98%";
 col.removeAttribute("class");
 }
 if(i> 1) remove(col);
}
// shorthand function to remove nodes
function remove(node) {
 node.parentNode.removeChild(node);
}
// xpath function
function get(query) {
 return document.evaluate(
 query,
 document,
 null,
 XPathResult.ORDERED_NODE_SNAPSHOT_TYPE,
 null
 );
}
});
//