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-rw-r--r--views/rain/snow.js1330
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diff --git a/views/rain/snow.js b/views/rain/snow.js
index 014dad0..26b13da 100644
--- a/views/rain/snow.js
+++ b/views/rain/snow.js
@@ -1,666 +1,666 @@
-/** @license
- * DHTML Snowstorm! JavaScript-based snow for web pages
- * Making it snow on the internets since 2003. You're welcome.
- * -----------------------------------------------------------
- * Version 1.44.20131208 (Previous rev: 1.44.20131125)
- * Copyright (c) 2007, Scott Schiller. All rights reserved.
- * Code provided under the BSD License
- * http://schillmania.com/projects/snowstorm/license.txt
- */
-
-/*jslint nomen: true, plusplus: true, sloppy: true, vars: true, white: true */
-/*global window, document, navigator, clearInterval, setInterval */
-
-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 = 128; // Limit total amount of snow made (falling + sticking)
- this.flakesMaxActive = 64; // 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 slower
- this.useGPU = true; // Enable transform-based hardware acceleration, reduce CPU load.
- this.className = null; // CSS class name for further customization on snow elements
- this.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 effect
- this.followMouse = true; // Snow movement can respond to the user's mouse
- this.snowColor = '#fff'; // Don't eat (or use?) yellow snow.
- this.snowCharacter = '•'; // • = bullet, · 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 reference
- this.useMeltEffect = true; // When recycling fallen snow (or rarely, when falling), have it "melt" and fade out if browser supports it
- this.useTwinkleEffect = false; // Allow snow to randomly "flicker" in and out of view while falling
- this.usePositionFixed = false; // true = snow does not shift vertically when scrolling. May increase CPU load, disabled by default - if enabled, used only where supported
- this.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 container
- this.flakeWidth = 8; // Max pixel width reserved for snow element
- this.flakeHeight = 8; // Max pixel height reserved for snow element
- this.vMaxX = 5; // Maximum X velocity range for snow
- this.vMaxY = 4; // Maximum Y velocity range for snow
- this.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 Chrome
- getAnimationFrame = _animationFrame ? function() {
- return _animationFrame.apply(window, arguments);
- } : null;
-
- var testDiv;
-
- testDiv = document.createElement('div');
-
- function has(prop) {
-
- // test for feature support
- var result = testDiv.style[prop];
- return (result !== 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 scrollbars
- o.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]; // prefix
- if (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 given
- scrollY = (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 animation
- if (!storm.disabled) {
- storm.disabled = 1;
- } else {
- return false;
- }
- storm.timer = null;
- };
-
- this.resume = function() {
- if (storm.disabled) {
- storm.disabled = 0;
- } else {
- return false;
- }
- storm.timerInit();
- };
-
- this.toggleSnow = function() {
- if (!storm.flakes.length) {
- // first run
- storm.start();
- } else {
- storm.active = !storm.active;
- if (storm.active) {
- storm.show();
- storm.resume();
- } 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.resume);
- } else {
- storm.events.remove(window,'blur',storm.freeze);
- storm.events.remove(window,'focus',storm.resume);
- }
- }
- };
-
- 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 check
- return 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 check
- s.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 frame
- s.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 batch
- storm.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.resume);
- } else {
- storm.events.add(window,'blur',storm.freeze);
- storm.events.add(window,'focus',storm.resume);
- }
- }
- 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 running
- return 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 dimensions
- storm.resizeHandler = storm.resizeHandlerAlt;
- //and force-enable pixel positioning
- storm.usePixelPosition = true;
- }
- storm.resizeHandler(); // get bounding box elements
- storm.usePositionFixed = (storm.usePositionFixed && !noFixed && !storm.flakeBottom); // whether or not position:fixed is to be used
- if (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 well
- targetElementIsRelative = false;
- }
- }
- fixedForEverything = storm.usePositionFixed;
- if (screenX && screenY && !storm.disabled) {
- storm.init();
- storm.active = true;
- }
- };
-
- function doDelayedStart() {
- window.setTimeout(function() {
- storm.start(true);
- }, 20);
- // event cleanup
- storm.events.remove(isIE?document:window,'mousemove',doDelayedStart);
- }
-
- function doStart() {
- if (!storm.excludeMobile || !isMobile) {
- doDelayedStart();
- }
- // event cleanup
- storm.events.remove(window, 'load', doStart);
- }
-
- // hooks for starting the snow
- if (storm.autoStart) {
- storm.events.add(window, 'load', doStart, false);
- }
-
- return this;
-
+/** @license
+ * DHTML Snowstorm! JavaScript-based snow for web pages
+ * Making it snow on the internets since 2003. You're welcome.
+ * -----------------------------------------------------------
+ * Version 1.44.20131208 (Previous rev: 1.44.20131125)
+ * Copyright (c) 2007, Scott Schiller. All rights reserved.
+ * Code provided under the BSD License
+ * http://schillmania.com/projects/snowstorm/license.txt
+ */
+
+/*jslint nomen: true, plusplus: true, sloppy: true, vars: true, white: true */
+/*global window, document, navigator, clearInterval, setInterval */
+
+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 = 128; // Limit total amount of snow made (falling + sticking)
+ this.flakesMaxActive = 64; // 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 slower
+ this.useGPU = true; // Enable transform-based hardware acceleration, reduce CPU load.
+ this.className = null; // CSS class name for further customization on snow elements
+ this.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 effect
+ this.followMouse = true; // Snow movement can respond to the user's mouse
+ this.snowColor = '#fff'; // Don't eat (or use?) yellow snow.
+ this.snowCharacter = '&bull;'; // &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 reference
+ this.useMeltEffect = true; // When recycling fallen snow (or rarely, when falling), have it "melt" and fade out if browser supports it
+ this.useTwinkleEffect = false; // Allow snow to randomly "flicker" in and out of view while falling
+ this.usePositionFixed = false; // true = snow does not shift vertically when scrolling. May increase CPU load, disabled by default - if enabled, used only where supported
+ this.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 container
+ this.flakeWidth = 8; // Max pixel width reserved for snow element
+ this.flakeHeight = 8; // Max pixel height reserved for snow element
+ this.vMaxX = 5; // Maximum X velocity range for snow
+ this.vMaxY = 4; // Maximum Y velocity range for snow
+ this.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 Chrome
+ getAnimationFrame = _animationFrame ? function() {
+ return _animationFrame.apply(window, arguments);
+ } : null;
+
+ var testDiv;
+
+ testDiv = document.createElement('div');
+
+ function has(prop) {
+
+ // test for feature support
+ var result = testDiv.style[prop];
+ return (result !== 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 scrollbars
+ o.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]; // prefix
+ if (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 given
+ scrollY = (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 animation
+ if (!storm.disabled) {
+ storm.disabled = 1;
+ } else {
+ return false;
+ }
+ storm.timer = null;
+ };
+
+ this.resume = function() {
+ if (storm.disabled) {
+ storm.disabled = 0;
+ } else {
+ return false;
+ }
+ storm.timerInit();
+ };
+
+ this.toggleSnow = function() {
+ if (!storm.flakes.length) {
+ // first run
+ storm.start();
+ } else {
+ storm.active = !storm.active;
+ if (storm.active) {
+ storm.show();
+ storm.resume();
+ } 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.resume);
+ } else {
+ storm.events.remove(window,'blur',storm.freeze);
+ storm.events.remove(window,'focus',storm.resume);
+ }
+ }
+ };
+
+ 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 check
+ return 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 check
+ s.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 frame
+ s.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 batch
+ storm.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.resume);
+ } else {
+ storm.events.add(window,'blur',storm.freeze);
+ storm.events.add(window,'focus',storm.resume);
+ }
+ }
+ 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 running
+ return 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 dimensions
+ storm.resizeHandler = storm.resizeHandlerAlt;
+ //and force-enable pixel positioning
+ storm.usePixelPosition = true;
+ }
+ storm.resizeHandler(); // get bounding box elements
+ storm.usePositionFixed = (storm.usePositionFixed && !noFixed && !storm.flakeBottom); // whether or not position:fixed is to be used
+ if (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 well
+ targetElementIsRelative = false;
+ }
+ }
+ fixedForEverything = storm.usePositionFixed;
+ if (screenX && screenY && !storm.disabled) {
+ storm.init();
+ storm.active = true;
+ }
+ };
+
+ function doDelayedStart() {
+ window.setTimeout(function() {
+ storm.start(true);
+ }, 20);
+ // event cleanup
+ storm.events.remove(isIE?document:window,'mousemove',doDelayedStart);
+ }
+
+ function doStart() {
+ if (!storm.excludeMobile || !isMobile) {
+ doDelayedStart();
+ }
+ // event cleanup
+ storm.events.remove(window, 'load', doStart);
+ }
+
+ // hooks for starting the snow
+ if (storm.autoStart) {
+ storm.events.add(window, 'load', doStart, false);
+ }
+
+ return this;
+
}(window, document)); \ No newline at end of file
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