From Wikipedia, the free encyclopedia
// By User:Pile0nades.
// Makes the diff page display as a single column, instead of two.
addOnloadHook(function(){
if(window.location.href.indexOf("&diff=") == -1) return;
// 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[1]/strong/..");
for(var i = 0; i < line.snapshotLength; i++) {
if(line.snapshotItem(i).firstChild == line.snapshotItem(i).lastChild) {
remove(line.snapshotItem(i))
}
}
// 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
);
}
});
