// ==UserScript==// @name         Neige W&A// @namespace    http://www.worldaide.fr/*// @version      1.0// @description  Neige Sur W&A// @author       Script Google / Sharke// @match// @grant        none// @include     http://www.worldaide.fr/*// ==/UserScript==var snowStorm = (function(window, document) {// --- common properties ---this.autoStart = true;          // Whether the snow should start automatically or not.this.excludeMobile = true;      // Snow is likely to be bad news for mobile phones' CPUs (and batteries.) Enable at your own risk.this.flakesMax = 150;           // Limit total amount of snow made (falling + sticking)this.flakesMaxActive = 80;      // Limit amount of snow falling at once (less = lower CPU use)this.animationInterval = 33;    // Theoretical "miliseconds per frame" measurement. 20 = fast + smooth, but high CPU use. 50 = more conservative, but slowerthis.useGPU = true;             // Enable transform-based hardware acceleration, reduce CPU load.this.className = null;          // CSS class name for further customization on snow elementsthis.excludeMobile = true;      // Snow is likely to be bad news for mobile phones' CPUs (and batteries.) By default, be nice.this.flakeBottom = null;        // Integer for Y axis snow limit, 0 or null for "full-screen" snow effectthis.followMouse = true;        // Snow movement can respond to the user's mousethis.snowColor = '#fff';        // Don't eat (or use?) yellow snow.this.snowCharacter = '&bullet;';  // &bull; = bullet, &middot; is square on some systems etc.this.snowStick = true;          // Whether or not snow should "stick" at the bottom. When off, will never collect.this.targetElement = null;      // element which snow will be appended to (null = document.body) - can be an element ID eg. 'myDiv', or a DOM node referencethis.useMeltEffect = true;      // When recycling fallen snow (or rarely, when falling), have it "melt" and fade out if browser supports itthis.useTwinkleEffect = false;  // Allow snow to randomly "flicker" in and out of view while fallingthis.usePositionFixed = false;  // true = snow does not shift vertically when scrolling. May increase CPU load, disabled by default - if enabled, used only where supportedthis.usePixelPosition = false;  // Whether to use pixel values for snow top/left vs. percentages. Auto-enabled if body is position:relative or targetElement is specified.// --- less-used bits ---this.freezeOnBlur = true;       // Only snow when the window is in focus (foreground.) Saves CPU.this.flakeLeftOffset = 0;       // Left margin/gutter space on edge of container (eg. browser window.) Bump up these values if seeing horizontal scrollbars.this.flakeRightOffset = 0;      // Right margin/gutter space on edge of containerthis.flakeWidth = 8;            // Max pixel width reserved for snow elementthis.flakeHeight = 8;           // Max pixel height reserved for snow elementthis.vMaxX = 5;                 // Maximum X velocity range for snowthis.vMaxY = 4;                 // Maximum Y velocity range for snowthis.zIndex = 0;                // CSS stacking order applied to each snowflake// --- "No user-serviceable parts inside" past this point, yadda yadda ---var storm = this,features,// UA sniffing and backCompat rendering mode checks for fixed position, etc.isIE = navigator.userAgent.match(/msie/i),isIE6 = navigator.userAgent.match(/msie 6/i),isMobile = navigator.userAgent.match(/mobile|opera m(ob|in)/i),isBackCompatIE = (isIE && document.compatMode === 'BackCompat'),noFixed = (isBackCompatIE || isIE6),screenX = null, screenX2 = null, screenY = null, scrollY = null, docHeight = null, vRndX = null, vRndY = null,windOffset = 1,windMultiplier = 2,flakeTypes = 6,fixedForEverything = false,targetElementIsRelative = false,opacitySupported = (function(){try {document.createElement('div').style.opacity = '0.5';} catch(e) {return false;}return true;}()),didInit = false,docFrag = document.createDocumentFragment();features = (function() {var getAnimationFrame;/*** hat tip: paul irish* http://paulirish.com/2011/requestanimationframe-for-smart-animating/* https://gist.github.com/838785*/function timeoutShim(callback) {window.setTimeout(callback, 1000/(storm.animationInterval || 20));}var _animationFrame = (window.requestAnimationFrame ||window.webkitRequestAnimationFrame ||window.mozRequestAnimationFrame ||window.oRequestAnimationFrame ||window.msRequestAnimationFrame ||timeoutShim);// apply to window, avoid "illegal invocation" errors in ChromegetAnimationFrame = _animationFrame ? function() {return _animationFrame.apply(window, arguments);} : null;var testDiv;testDiv = document.createElement('div');function has(prop) {// test for feature supportvar r###lt = testDiv.style[prop];return (r###lt !== undefined ? prop : null);}// note local scope.var localFeatures = {transform: {ie:  has('-ms-transform'),moz: has('MozTransform'),opera: has('OTransform'),webkit: has('webkitTransform'),w3: has('transform'),prop: null // the normalized property value},getAnimationFrame: getAnimationFrame};localFeatures.transform.prop = (localFeatures.transform.w3 ||localFeatures.transform.moz ||localFeatures.transform.webkit ||localFeatures.transform.ie ||localFeatures.transform.opera);testDiv = null;return localFeatures;}());this.timer = null;this.flakes = [];this.disabled = false;this.active = false;this.meltFrameCount = 20;this.meltFrames = [];this.setXY = function(o, x, y) {if (!o) {return false;}if (storm.usePixelPosition || targetElementIsRelative) {o.style.left = (x - storm.flakeWidth) + 'px';o.style.top = (y - storm.flakeHeight) + 'px';} else if (noFixed) {o.style.right = (100-(x/screenX*100)) + '%';// avoid creating vertical scrollbarso.style.top = (Math.min(y, docHeight-storm.flakeHeight)) + 'px';} else {if (!storm.flakeBottom) {// if not using a fixed bottom coordinate...o.style.right = (100-(x/screenX*100)) + '%';o.style.bottom = (100-(y/screenY*100)) + '%';} else {// absolute top.o.style.right = (100-(x/screenX*100)) + '%';o.style.top = (Math.min(y, docHeight-storm.flakeHeight)) + 'px';}}};this.events = (function() {var old = (!window.addEventListener && window.attachEvent), slice = Array.prototype.slice,evt = {add: (old?'attachEvent':'addEventListener'),remove: (old?'detachEvent':'removeEventListener')};function getArgs(oArgs) {var args = slice.call(oArgs), len = args.length;if (old) {args[1] = 'on' + args[1]; // prefixif (len > 3) {args.pop(); // no capture}} else if (len === 3) {args.push(false);}return args;}function apply(args, sType) {var element = args.shift(),method = [evt[sType]];if (old) {element[method](args[0], args[1]);} else {element[method].apply(element, args);}}function addEvent() {apply(getArgs(arguments), 'add');}function removeEvent() {apply(getArgs(arguments), 'remove');}return {add: addEvent,remove: removeEvent};}());function rnd(n,min) {if (isNaN(min)) {min = 0;}return (Math.random()*n)+min;}function plusMinus(n) {return (parseInt(rnd(2),10)===1?n*-1:n);}this.randomizeWind = function() {var i;vRndX = plusMinus(rnd(storm.vMaxX,0.2));vRndY = rnd(storm.vMaxY,0.2);if (this.flakes) {for (i=0; i<this.flakes.length; i++) {if (this.flakes[i].active) {this.flakes[i].setVelocities();}}}};this.scrollHandler = function() {var i;// "attach" snowflakes to bottom of window if no absolute bottom value was givenscrollY = (storm.flakeBottom ? 0 : parseInt(window.scrollY || document.documentElement.scrollTop || (noFixed ? document.body.scrollTop : 0), 10));if (isNaN(scrollY)) {scrollY = 0; // Netscape 6 scroll fix}if (!fixedForEverything && !storm.flakeBottom && storm.flakes) {for (i=0; i<storm.flakes.length; i++) {if (storm.flakes[i].active === 0) {storm.flakes[i].stick();}}}};this.resizeHandler = function() {if (window.innerWidth || window.innerHeight) {screenX = window.innerWidth - 16 - storm.flakeRightOffset;screenY = (storm.flakeBottom || window.innerHeight);} else {screenX = (document.documentElement.clientWidth || document.body.clientWidth || document.body.scrollWidth) - (!isIE ? 8 : 0) - storm.flakeRightOffset;screenY = storm.flakeBottom || document.documentElement.clientHeight || document.body.clientHeight || document.body.scrollHeight;}docHeight = document.body.offsetHeight;screenX2 = parseInt(screenX/2,10);};this.resizeHandlerAlt = function() {screenX = storm.targetElement.offsetWidth - storm.flakeRightOffset;screenY = storm.flakeBottom || storm.targetElement.offsetHeight;screenX2 = parseInt(screenX/2,10);docHeight = document.body.offsetHeight;};this.freeze = function() {// pause animationif (!storm.disabled) {storm.disabled = 1;} else {return false;}storm.timer = null;};this.r###me = function() {if (storm.disabled) {storm.disabled = 0;} else {return false;}storm.timerInit();};this.toggleSnow = function() {if (!storm.flakes.length) {// first runstorm.start();} else {storm.active = !storm.active;if (storm.active) {storm.show();storm.r###me();} else {storm.stop();storm.freeze();}}};this.stop = function() {var i;this.freeze();for (i=0; i<this.flakes.length; i++) {this.flakes[i].o.style.display = 'none';}storm.events.remove(window,'scroll',storm.scrollHandler);storm.events.remove(window,'resize',storm.resizeHandler);if (storm.freezeOnBlur) {if (isIE) {storm.events.remove(document,'focusout',storm.freeze);storm.events.remove(document,'focusin',storm.r###me);} else {storm.events.remove(window,'blur',storm.freeze);storm.events.remove(window,'focus',storm.r###me);}}};this.show = function() {var i;for (i=0; i<this.flakes.length; i++) {this.flakes[i].o.style.display = 'block';}};this.SnowFlake = function(type,x,y) {var s = this;this.type = type;this.x = x||parseInt(rnd(screenX-20),10);this.y = (!isNaN(y)?y:-rnd(screenY)-12);this.vX = null;this.vY = null;this.vAmpTypes = [1,1.2,1.4,1.6,1.8]; // "amplification" for vX/vY (based on flake size/type)this.vAmp = this.vAmpTypes[this.type] || 1;this.melting = false;this.meltFrameCount = storm.meltFrameCount;this.meltFrames = storm.meltFrames;this.meltFrame = 0;this.twinkleFrame = 0;this.active = 1;this.fontSize = (10+(this.type/5)*10);this.o = document.createElement('div');this.o.innerHTML = storm.snowCharacter;if (storm.className) {this.o.setAttribute('class', storm.className);}this.o.style.color = storm.snowColor;this.o.style.position = (fixedForEverything?'fixed':'absolute');if (storm.useGPU && features.transform.prop) {// GPU-accelerated snow.this.o.style[features.transform.prop] = 'translate3d(0px, 0px, 0px)';}this.o.style.width = storm.flakeWidth+'px';this.o.style.height = storm.flakeHeight+'px';this.o.style.fontFamily = 'arial,verdana';this.o.style.cursor = 'default';this.o.style.overflow = 'hidden';this.o.style.fontWeight = 'normal';this.o.style.zIndex = storm.zIndex;docFrag.appendChild(this.o);this.refresh = function() {if (isNaN(s.x) || isNaN(s.y)) {// safety checkreturn false;}storm.setXY(s.o, s.x, s.y);};this.stick = function() {if (noFixed || (storm.targetElement !== document.documentElement && storm.targetElement !== document.body)) {s.o.style.top = (screenY+scrollY-storm.flakeHeight)+'px';} else if (storm.flakeBottom) {s.o.style.top = storm.flakeBottom+'px';} else {s.o.style.display = 'none';s.o.style.bottom = '0%';s.o.style.position = 'fixed';s.o.style.display = 'block';}};this.vCheck = function() {if (s.vX>=0 && s.vX<0.2) {s.vX = 0.2;} else if (s.vX<0 && s.vX>-0.2) {s.vX = -0.2;}if (s.vY>=0 && s.vY<0.2) {s.vY = 0.2;}};this.move = function() {var vX = s.vX*windOffset, yDiff;s.x += vX;s.y += (s.vY*s.vAmp);if (s.x >= screenX || screenX-s.x < storm.flakeWidth) { // X-axis scroll checks.x = 0;} else if (vX < 0 && s.x-storm.flakeLeftOffset < -storm.flakeWidth) {s.x = screenX-storm.flakeWidth-1; // flakeWidth;}s.refresh();yDiff = screenY+scrollY-s.y+storm.flakeHeight;if (yDiff<storm.flakeHeight) {s.active = 0;if (storm.snowStick) {s.stick();} else {s.recycle();}} else {if (storm.useMeltEffect && s.active && s.type < 3 && !s.melting && Math.random()>0.998) {// ~1/1000 chance of melting mid-air, with each frames.melting = true;s.melt();// only incrementally melt one frame// s.melting = false;}if (storm.useTwinkleEffect) {if (s.twinkleFrame < 0) {if (Math.random() > 0.97) {s.twinkleFrame = parseInt(Math.random() * 8, 10);}} else {s.twinkleFrame--;if (!opacitySupported) {s.o.style.visibility = (s.twinkleFrame && s.twinkleFrame % 2 === 0 ? 'hidden' : 'visible');} else {s.o.style.opacity = (s.twinkleFrame && s.twinkleFrame % 2 === 0 ? 0 : 1);}}}}};this.animate = function() {// main animation loop// move, check status, die etc.s.move();};this.setVelocities = function() {s.vX = vRndX+rnd(storm.vMaxX*0.12,0.1);s.vY = vRndY+rnd(storm.vMaxY*0.12,0.1);};this.setOpacity = function(o,opacity) {if (!opacitySupported) {return false;}o.style.opacity = opacity;};this.melt = function() {if (!storm.useMeltEffect || !s.melting) {s.recycle();} else {if (s.meltFrame < s.meltFrameCount) {s.setOpacity(s.o,s.meltFrames[s.meltFrame]);s.o.style.fontSize = s.fontSize-(s.fontSize*(s.meltFrame/s.meltFrameCount))+'px';s.o.style.lineHeight = storm.flakeHeight+2+(storm.flakeHeight*0.75*(s.meltFrame/s.meltFrameCount))+'px';s.meltFrame++;} else {s.recycle();}}};this.recycle = function() {s.o.style.display = 'none';s.o.style.position = (fixedForEverything?'fixed':'absolute');s.o.style.bottom = 'auto';s.setVelocities();s.vCheck();s.meltFrame = 0;s.melting = false;s.setOpacity(s.o,1);s.o.style.padding = '0px';s.o.style.margin = '0px';s.o.style.fontSize = s.fontSize+'px';s.o.style.lineHeight = (storm.flakeHeight+2)+'px';s.o.style.textAlign = 'center';s.o.style.verticalAlign = 'baseline';s.x = parseInt(rnd(screenX-storm.flakeWidth-20),10);s.y = parseInt(rnd(screenY)*-1,10)-storm.flakeHeight;s.refresh();s.o.style.display = 'block';s.active = 1;};this.recycle(); // set up x/y coords etc.this.refresh();};this.snow = function() {var active = 0, flake = null, i, j;for (i=0, j=storm.flakes.length; i<j; i++) {if (storm.flakes[i].active === 1) {storm.flakes[i].move();active++;}if (storm.flakes[i].melting) {storm.flakes[i].melt();}}if (active<storm.flakesMaxActive) {flake = storm.flakes[parseInt(rnd(storm.flakes.length),10)];if (flake.active === 0) {flake.melting = true;}}if (storm.timer) {features.getAnimationFrame(storm.snow);}};this.mouseMove = function(e) {if (!storm.followMouse) {return true;}var x = parseInt(e.clientX,10);if (x<screenX2) {windOffset = -windMultiplier+(x/screenX2*windMultiplier);} else {x -= screenX2;windOffset = (x/screenX2)*windMultiplier;}};this.createSnow = function(limit,allowInactive) {var i;for (i=0; i<limit; i++) {storm.flakes[storm.flakes.length] = new storm.SnowFlake(parseInt(rnd(flakeTypes),10));if (allowInactive || i>storm.flakesMaxActive) {storm.flakes[storm.flakes.length-1].active = -1;}}storm.targetElement.appendChild(docFrag);};this.timerInit = function() {storm.timer = true;storm.snow();};this.init = function() {var i;for (i=0; i<storm.meltFrameCount; i++) {storm.meltFrames.push(1-(i/storm.meltFrameCount));}storm.randomizeWind();storm.createSnow(storm.flakesMax); // create initial batchstorm.events.add(window,'resize',storm.resizeHandler);storm.events.add(window,'scroll',storm.scrollHandler);if (storm.freezeOnBlur) {if (isIE) {storm.events.add(document,'focusout',storm.freeze);storm.events.add(document,'focusin',storm.r###me);} else {storm.events.add(window,'blur',storm.freeze);storm.events.add(window,'focus',storm.r###me);}}storm.resizeHandler();storm.scrollHandler();if (storm.followMouse) {storm.events.add(isIE?document:window,'mousemove',storm.mouseMove);}storm.animationInterval = Math.max(20,storm.animationInterval);storm.timerInit();};this.start = function(bFromOnLoad) {if (!didInit) {didInit = true;} else if (bFromOnLoad) {// already loaded and runningreturn true;}if (typeof storm.targetElement === 'string') {var targetID = storm.targetElement;storm.targetElement = document.getElementById(targetID);if (!storm.targetElement) {throw new Error('Snowstorm: Unable to get targetElement "'+targetID+'"');}}if (!storm.targetElement) {storm.targetElement = (document.body || document.documentElement);}if (storm.targetElement !== document.documentElement && storm.targetElement !== document.body) {// re-map handler to get element instead of screen dimensionsstorm.resizeHandler = storm.resizeHandlerAlt;//and force-enable pixel positioningstorm.usePixelPosition = true;}storm.resizeHandler(); // get bounding box elementsstorm.usePositionFixed = (storm.usePositionFixed && !noFixed && !storm.flakeBottom); // whether or not position:fixed is to be usedif (window.getComputedStyle) {// attempt to determine if body or user-specified snow parent element is relatlively-positioned.try {targetElementIsRelative = (window.getComputedStyle(storm.targetElement, null).getPropertyValue('position') === 'relative');} catch(e) {// oh welltargetElementIsRelative = false;}}fixedForEverything = storm.usePositionFixed;if (screenX && screenY && !storm.disabled) {storm.init();storm.active = true;}};function doDelayedStart() {window.setTimeout(function() {storm.start(true);}, 20);// event cleanupstorm.events.remove(isIE?document:window,'mousemove',doDelayedStart);}function doStart() {if (!storm.excludeMobile || !isMobile) {doDelayedStart();}// event cleanupstorm.events.remove(window, 'load', doStart);}// hooks for starting the snowif (storm.autoStart) {storm.events.add(window, 'load', doStart, false);}return this;}(window, document));