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Adds some extra keystrokes to Firefox.
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// ==UserScript==
// @name More Keybinds
// @namespace MK
// @description Adds some extra keystrokes to Firefox.
// @version 1.2.0
// @include *
// ==/UserScript==
var SCROLL_AMOUNT = 60;
// Not all keys fire a keypress event (Chrome 2010), so we use keydown.
document.addEventListener('keydown', keypressListener, false);
function keypressListener(evt) {
var code = evt.keyCode || evt.which;
/*
var modifierReport = "";
modifierReport += ( evt.ctrlKey ? "Ctrl " : "" );
modifierReport += ( evt.shiftKey ? "Shift " : "" );
modifierReport += ( evt.altKey ? "Alt " : "" );
GM_log("Caught keypress "+code+" with modifiers: "+modifierReport);
*/
// Actions
// Ctrl+Delete goes Back
if (code == 8 && evt.ctrlKey) {
window.history.back();
}
// Ctrl+Enter goes Forward
if (code == 13 && evt.ctrlKey) {
window.history.forward();
}
/* These conflict with selecting words in text!
// Ctrl+Shift+Left goes Back
if (code == 37 && evt.ctrlKey && evt.shiftKey) {
window.history.back();
}
// Ctrl+Shift+Right goes Forward
if (code == 39 && evt.ctrlKey && evt.shiftKey) {
window.history.forward();
}
*/
// Ctrl+Shift+Up goes up in the URL path (removes the tail leaf)
if (code == 38 && evt.ctrlKey && evt.shiftKey) {
var newURL = document.location.href;
if (newURL.slice(-1)=='/') {
newURL = newURL.slice(0,-1);
}
document.location.href = document.location.href.replace(/[#/?][^#/?]*[/]*$/,'');
}
// Do not intercept any of the keys below when the user is focused on an input or textarea.
/*
//var focusedElement = document.activeElement; // document.body if no input is focused
var focusedElement = evt.target || event.srcElement;
if (focusedElement) {
var isInput = focusedElement.nodeName === 'INPUT' || focusedElement.nodeName === 'TEXTAREA';
if (isInput) {
return;
}
}
*/
// From next_imageprevious_image.user.js:
if (evt.target.tagName && evt.target.tagName.match(/input|select|textarea/i) || evt.target.getAttribute('contenteditable')==="true") {
return;
}
if (!evt.ctrlKey && !evt.shiftKey && !evt.metaKey) {
if (document.location.host !== "9gag.com") {
if (code === 'K'.charCodeAt(0)) {
scrollBy(-getScrollAmount());
}
if (code === 'J'.charCodeAt(0)) {
scrollBy(+getScrollAmount());
}
}
}
}
function scrollBy(amount) {
// If jQuery is present, use it to perform a smooth scroll
if (typeof $ !== "undefined") {
queue(function(next){
$("html,body").animate({scrollTop: $(document).scrollTop() + amount}, 200, "swing", ifBody(next));
});
} else {
// Chrome:
document.body.scrollTop += amount;
// Firefox:
document.documentElement.scrollTop += amount;
}
}
function getScrollAmount() {
return window.innerHeight / 6;
}
function ifBody(fn) {
return function(){
// jQuery calls complete once for each element, and we have two elements. Annoying!
if (this === document.body) {
fn();
}
};
}
var actions = [];
var running = false;
function queue(action) {
actions.push(action);
if (!running) {
dequeue();
}
}
function dequeue() {
if (actions.length > 0) {
var nextAction = actions.shift();
running = true;
nextAction(dequeue);
} else {
running = false;
}
}