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// ==UserScript==
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// @name mouseless-autoscroll
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// @namespace Utopiah
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// @description autoscroll without using your hands (keep them for the coffee cup ;)
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// @include *
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// @exclude *?action=edit
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// @exclude *tube.com/*
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// @exclude *cartoons*
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// @exclude *://mail.google.com/*
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// @exclude *video*
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// @exclude *.tv/*
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// @exclude *vimeo.com/*
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// @exclude *putlocker.com/file/*
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// @require http://ecmanaut.googlecode.com/svn/trunk/lib/gm/$x$X.js
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// ==/UserScript==
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// the require script is a part of ecmanaut grand project
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// to re-organize the world starting with the annoying interface to the DOM API
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/*
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* Script homepage : http://userscripts.org/forums/1/topics/2150
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* To do : check the homepage http://fabien.benetou.fr/Tools/Greasemonkey#MouselessAutoscroll
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*/
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//=================================== Configuration =======================================
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var SPEED_STEP=1; // step size for increase and decrease of speed
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var BASE_TIME=4; // default scrolling speed in speed-step
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var MAX_SLOWEST_SPEED=10; // define the slowest speed-step
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var speed=GM_getValue("speed", BASE_TIME); // load last speed value
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var timer = null; // handle for the periodic call to the scrolling function
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//=================================== Core =============================================
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// loop as fast as required, don't loop when speed is inferior to the small timestep
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function reset_timer() {
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if (timer) { window.clearTimeout(timer); };
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if (speed >= MAX_SLOWEST_SPEED) timer = null;
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else timer = window.setInterval(scroll, Math.exp(speed));
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}
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// actually scroll the window one pixel down
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function scroll () { window.scrollBy(0, 1); };
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// Reminder : use window.scrollBy(0, -1) to scroll up
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// call the scrolling loop
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reset_timer();
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//=================================== Interface =========================================
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function scroll_faster () {
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if(speed>=SPEED_STEP){ speed-=SPEED_STEP; }
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// else { find a way to display to the user we reached the maximum speed... any idea ? }
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hideallbuttons();
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// instead each action should individually self-clean their picture with a setTimeout
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// that would need 5 different functions because of the setTimeout Greasemonkey specificity
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// (especially since we can't specify parameters within setTimeout call in GM afaik)
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var button = document.getElementById('button_faster'); button.style.visibility="visible";
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setTimeout(hideallbuttons,2000);
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reset_timer();
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};
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function scroll_slower () {
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if(speed>=MAX_SLOWEST_SPEED-SPEED_STEP) { speed=MAX_SLOWEST_SPEED; scroll_pause(); return;}
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if(speed<MAX_SLOWEST_SPEED-SPEED_STEP) { speed+=SPEED_STEP; }
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hideallbuttons();
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var button = document.getElementById('button_slower'); button.style.visibility="visible";
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setTimeout(hideallbuttons,2000);
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reset_timer();
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};
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function scroll_start () {
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hideallbuttons();
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var button = document.getElementById('button_start'); button.style.visibility="visible";
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setTimeout(hideallbuttons,2000);
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reset_timer();
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};
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function scroll_pause () {
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// should use var with local page scope, NOT global GM getValue
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speed=MAX_SLOWEST_SPEED; // does not use a specific pause var/const, could be interesting to make the distinction
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hideallbuttons();
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var button = document.getElementById('button_pause'); button.style.visibility="visible";
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reset_timer();
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};
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function scroll_reset () {
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speed=BASE_TIME;
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hideallbuttons();
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var button = document.getElementById('button_reset'); button.style.visibility="visible";
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setTimeout(hideallbuttons,2000);
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reset_timer();
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};
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function hideallbuttons() {
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document.getElementById('button_pause').style.visibility="hidden";
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document.getElementById('button_start').style.visibility="hidden";
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document.getElementById('button_faster').style.visibility="hidden";
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document.getElementById('button_slower').style.visibility="hidden";
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document.getElementById('button_reset').style.visibility="hidden";
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};
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GM_registerMenuCommand( "Start scrolling", scroll_start, "s", "", "t" );
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GM_registerMenuCommand( "Pause scrolling", scroll_pause, "p", "", "p" );
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GM_registerMenuCommand( "Scroll faster", scroll_faster, "l", "", "f" );
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GM_registerMenuCommand( "Scroll slower", scroll_slower, "k", "", "s" );
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GM_registerMenuCommand( "Reset scrolling speed", scroll_reset, "r", "", "r" );
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function addGlobalStyle(css) {
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var head, style;
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head = document.getElementsByTagName('head')[0];
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if (!head) { return; }
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style = document.createElement('style');
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style.type = 'text/css';
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style.innerHTML = css;
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head.appendChild(style);
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}
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addGlobalStyle( 'div#scrollercontroller { position:fixed; bottom:0; right:0;visibility:visible;}'
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+'p.button { visibility:hidden; position:fixed; bottom:0; right:0; } '
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);
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var scrollercontroller = document.createElement('div');
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scrollercontroller.id = 'scrollercontroller';
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var pauseButtonElement = document.createElement('p');
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pauseButtonElement.className = 'button';
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pauseButtonElement.id = 'button_pause';
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pauseButtonElement.innerHTML = '||';
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var playButtonElement = document.createElement('p');
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playButtonElement.className = 'button';
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playButtonElement.id = 'button_start';
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playButtonElement.innerHTML = 'Autoscroll';
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var slowerButtonElement = document.createElement('p');
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slowerButtonElement.className = 'button';
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slowerButtonElement.id = 'button_slower';
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slowerButtonElement.innerHTML = '<<';
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var fasterButtonElement = document.createElement('p');
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fasterButtonElement.className = 'button';
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fasterButtonElement.id = 'button_faster';
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fasterButtonElement.innerHTML = '>>';
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var resetButtonElement = document.createElement('p');
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resetButtonElement.className = 'button';
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resetButtonElement.id = 'button_reset';
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resetButtonElement.innerHTML = 'reset';
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scrollercontroller.appendChild(pauseButtonElement);
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scrollercontroller.appendChild(playButtonElement);
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scrollercontroller.appendChild(slowerButtonElement);
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scrollercontroller.appendChild(fasterButtonElement);
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scrollercontroller.appendChild(resetButtonElement);
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// Display the visual interface
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document.body.insertBefore(scrollercontroller, document.body.firstChild);
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function shortcuts (e){
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switch(e.charCode)
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{
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case "s".charCodeAt(0) : scroll_start(); break;
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case "p".charCodeAt(0) : scroll_pause(); break;
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case "l".charCodeAt(0) : scroll_faster(); break;
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case "k".charCodeAt(0) : scroll_slower(); break;
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case "r".charCodeAt(0) : scroll_reset(); break;
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}
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};
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function registerShortcuts() {
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window.addEventListener("keypress", shortcuts, true);
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};
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function unregisterShortcuts() {
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window.removeEventListener("keypress", shortcuts, true);
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};
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registerShortcuts();
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$x('//input | //textarea | //select').forEach(registerListener);
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function registerListener(node) {
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node.addEventListener("mouseover", function() {
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unregisterShortcuts();
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scroll_pause(); }, true);
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node.addEventListener("mouseout", function() {
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scroll_start ();
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registerShortcuts();
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}, true);
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}
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