387 lines
12 KiB
JavaScript
387 lines
12 KiB
JavaScript
/*
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----------------------------------------------------
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Loader.js : 0.4.2 : 2012/11/09
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----------------------------------------------------
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https://github.com/mudcube/Loader.js
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----------------------------------------------------
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/// Simple setup.
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var loader = new widgets.Loader;
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/// More complex setup.
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var loader = new widgets.Loader({
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id: "loader",
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bars: 12,
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radius: 0,
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lineWidth: 20,
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lineHeight: 70,
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timeout: 30, // maximum timeout in seconds.
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background: "rgba(0,0,0,0.5)",
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container: document.body,
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oncomplete: function() {
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// call function once loader has completed
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},
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onstart: function() {
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// call function once loader has started
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}
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});
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/// Add a new message to the queue.
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var loaderId = loader.add({
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message: "test",
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getProgress: function() { // sends progress to loader.js
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return progress; // value between 1-100
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}
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});
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/// Remove a specific loader message.
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loader.remove(loaderId);
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/// Recenter the loader within container (run onresize)
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loader.center();
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/// Stop all loader instances.
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loader.stop();
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*/
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if (typeof (widgets) === "undefined") var widgets = {};
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(function() { "use strict";
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var PI = Math.PI;
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var noCanvas = !document.createElement("canvas").getContext;
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var fadeOutSpeed = 400;
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var defaultConfig = {
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id: "loader",
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bars: 12,
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radius: 0,
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lineWidth: 20,
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lineHeight: 70,
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timeout: 0,
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display: true
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};
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widgets.Loader = function (configure) {
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if (noCanvas) return;
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var that = this;
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if (typeof (configure) === "string") configure = { message: configure };
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if (typeof (configure) === "boolean") configure = { display: false };
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if (typeof (configure) === "undefined") configure = {};
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configure.container = configure.container || document.body;
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if (!configure.container) return;
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/// Mixin the default configurations.
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for (var key in defaultConfig) {
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if (typeof (configure[key]) === "undefined") {
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configure[key] = defaultConfig[key];
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}
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}
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/// Setup element
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var canvas = document.getElementById(configure.id);
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if (!canvas) {
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var div = document.createElement("div");
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var span = document.createElement("span");
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span.className = "message";
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div.appendChild(span);
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div.className = defaultConfig.id;
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div.style.cssText = transitionCSS("opacity", fadeOutSpeed);
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this.span = span;
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this.div = div;
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var canvas = document.createElement("canvas");
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document.body.appendChild(canvas);
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canvas.id = configure.id;
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canvas.style.cssText = "opacity: 1; position: absolute; z-index: 10000;";
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div.appendChild(canvas);
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configure.container.appendChild(div);
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} else {
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this.span = canvas.parentNode.getElementsByTagName("span")[0];
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}
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/// Configure
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var delay = configure.delay;
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var bars = configure.bars;
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var radius = configure.radius;
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var max = configure.lineHeight + 20;
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var size = max * 2 + configure.radius * 2;
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var windowSize = getWindowSize(configure.container);
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var width = windowSize.width - size;
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var height = windowSize.height - size;
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var deviceRatio = window.devicePixelRatio || 1;
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///
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canvas.width = size * deviceRatio;
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canvas.height = size * deviceRatio;
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///
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var iteration = 0;
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var ctx = canvas.getContext("2d");
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ctx.globalCompositeOperation = "lighter";
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ctx.shadowOffsetX = 1;
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ctx.shadowOffsetY = 1;
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ctx.shadowBlur = 1;
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ctx.shadowColor = "rgba(0, 0, 0, 0.5)";
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/// Public functions.
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this.messages = {};
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this.message = function (message, onstart) {
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if (!this.interval) return this.start(onstart, message);
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return this.add({
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message: message,
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onstart: onstart
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});
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};
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this.update = function(id, message, percent) {
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if (!id) for (var id in this.messages);
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var item = this.messages[id];
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item.message = message;
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if (typeof(percent) === "number") item.span.innerHTML = percent + "%";
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if (message.substr(-3) === "...") { // animated dots
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item._message = message.substr(0, message.length - 3);
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item.messageAnimate = [". ", ".. ", "..."].reverse();
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} else { // normal
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item._message = message;
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item.messageAnimate = false;
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}
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///
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item.element.innerHTML = message;
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};
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this.add = function (conf) {
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if (typeof(conf) === "string") conf = { message: conf };
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var background = configure.background ? configure.background : "rgba(0,0,0,0.65)";
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this.span.style.cssText = "background: " + background + ";";
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this.div.style.cssText = transitionCSS("opacity", fadeOutSpeed);
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if (this.stopPropagation) {
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this.div.style.cssText += "background: rgba(0,0,0,0.25);";
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} else {
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this.div.style.cssText += "pointer-events: none;";
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}
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///
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canvas.parentNode.style.opacity = 1;
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canvas.parentNode.style.display = "block";
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if (configure.background) this.div.style.background = configure.backgrond;
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///
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var timestamp = (new Date()).getTime();
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var seed = Math.abs(timestamp * Math.random() >> 0);
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var message = conf.message;
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///
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var container = document.createElement("div");
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container.style.cssText = transitionCSS("opacity", 500);
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var span = document.createElement("span");
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span.style.cssText = "float: right; width: 50px;";
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var node = document.createElement("span");
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node.innerHTML = message;
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///
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container.appendChild(node);
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container.appendChild(span);
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///
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var item = this.messages[seed] = {
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seed: seed,
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container: container,
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element: node,
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span: span,
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message: message,
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timeout: (conf.timeout || configure.timeout) * 1000,
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timestamp: timestamp,
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getProgress: conf.getProgress
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};
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this.span.appendChild(container);
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this.span.style.display = "block";
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this.update(item.seed, message);
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/// Escape event loop.
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if (conf.onstart) {
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window.setTimeout(conf.onstart, 50);
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}
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///
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this.center();
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///
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if (!this.interval) {
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if (!conf.delay) renderAnimation();
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window.clearInterval(this.interval);
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this.interval = window.setInterval(renderAnimation, 30);
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}
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/// Return identifier.
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return seed;
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};
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this.remove = function (seed) {
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iteration += 0.07;
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var timestamp = (new Date()).getTime();
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if (typeof(seed) === "object") seed = seed.join(":");
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if (seed) seed = ":" + seed + ":";
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/// Remove element.
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for (var key in this.messages) {
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var item = this.messages[key];
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if (!seed || seed.indexOf(":" + item.seed + ":") !== -1) {
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delete this.messages[item.seed];
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item.container.style.color = "#99ff88";
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removeChild(item);
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if (item.getProgress) item.span.innerHTML = "100%";
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}
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}
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};
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this.start = function (onstart, message) {
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if (!(message || configure.message)) return;
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return this.add({
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message: message || configure.message,
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onstart: onstart
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});
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};
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this.stop = function () {
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this.remove();
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window.clearInterval(this.interval);
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delete this.interval;
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if (configure.oncomplete) configure.oncomplete();
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if (canvas && canvas.style) {
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div.style.cssText += "pointer-events: none;";
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window.setTimeout(function() {
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that.div.style.opacity = 0;
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}, 1);
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window.setTimeout(function () {
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if (that.interval) return;
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that.stopPropagation = false;
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canvas.parentNode.style.display = "none";
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ctx.clearRect(0, 0, size, size);
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}, fadeOutSpeed * 1000);
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}
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};
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this.center = function() {
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var windowSize = getWindowSize(configure.container);
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var width = windowSize.width - size;
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var height = windowSize.height - size;
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/// Center the animation within the content.
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canvas.style.left = (width / 2) + "px";
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canvas.style.top = (height / 2) + "px";
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canvas.style.width = (size) + "px";
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canvas.style.height = (size) + "px";
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that.span.style.top = (height / 2 + size - 10) + "px";
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};
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var style = document.createElement("style");
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style.innerHTML = '\
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.loader { color: #fff; position: fixed; left: 0; top: 0; width: 100%; height: 100%; z-index: 100000; opacity: 0; display: none; }\
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.loader span.message { line-height: 1.5em; font-family: monospace; font-size: 14px; margin: auto; opacity: 1; display: none; border-radius: 10px; padding: 0px; width: 300px; text-align: center; position: absolute; z-index: 10000; left: 0; right: 0; }\
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.loader span.message div { border-bottom: 1px solid #222; padding: 5px 10px; clear: both; text-align: left; opacity: 1; }\
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.loader span.message div:last-child { border-bottom: none; }\
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';
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document.head.appendChild(style);
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/// Private functions.
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var removeChild = function(item) {
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window.setTimeout(function() { // timeout in case within same event loop.
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item.container.style.opacity = 0;
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}, 1);
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window.setTimeout(function() { // wait for opacity=0 before removing the element.
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item.container.parentNode.removeChild(item.container);
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}, 250);
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};
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var renderAnimation = function () {
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var timestamp = (new Date()).getTime();
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for (var key in that.messages) {
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var item = that.messages[key];
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var nid = iteration / 0.07 >> 0;
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if (nid % 5 === 0 && item.getProgress) {
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if (item.timeout && item.timestamp && timestamp - item.timestamp > item.timeout) {
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that.remove(item.seed);
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continue;
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}
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var progress = item.getProgress();
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if (progress >= 100) {
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that.remove(item.seed);
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continue;
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}
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item.span.innerHTML = (progress >> 0) + "%";
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}
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if (nid % 10 === 0) {
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if (item.messageAnimate) {
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var length = item.messageAnimate.length;
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var n = nid / 10 % length;
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var text = item._message + item.messageAnimate[n];
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item.element.innerHTML = text;
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}
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}
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}
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if (!key) {
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that.stop();
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}
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//
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ctx.save();
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ctx.clearRect(0, 0, size * deviceRatio, size * deviceRatio);
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ctx.scale(deviceRatio, deviceRatio);
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ctx.translate(size / 2, size / 2);
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var hues = 360 - 360 / bars;
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for (var i = 0; i < bars; i++) {
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var angle = (i / bars * 2 * PI) + iteration;
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ctx.save();
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ctx.translate(radius * Math.sin(-angle), radius * Math.cos(-angle));
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ctx.rotate(angle);
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// round-rect properties
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var x = -configure.lineWidth / 2;
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var y = 0;
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var width = configure.lineWidth;
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var height = configure.lineHeight;
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var curve = width / 2;
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// round-rect path
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ctx.beginPath();
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ctx.moveTo(x + curve, y);
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ctx.lineTo(x + width - curve, y);
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ctx.quadraticCurveTo(x + width, y, x + width, y + curve);
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ctx.lineTo(x + width, y + height - curve);
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ctx.quadraticCurveTo(x + width, y + height, x + width - curve, y + height);
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ctx.lineTo(x + curve, y + height);
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ctx.quadraticCurveTo(x, y + height, x, y + height - curve);
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ctx.lineTo(x, y + curve);
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ctx.quadraticCurveTo(x, y, x + curve, y);
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// round-rect fill
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var hue = ((i / (bars - 1)) * hues);
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ctx.fillStyle = "hsla(" + hue + ", 100%, 50%, 0.85)";
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ctx.fill();
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ctx.restore();
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}
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ctx.restore();
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iteration += 0.07;
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};
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//
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if (configure.display === false) return this;
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//
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this.start();
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//
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return this;
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};
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////
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var transitionCSS = function(type, ms) {
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return '\
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-webkit-transition-property: '+type+';\
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-webkit-transition-duration: '+ms+'ms;\
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-moz-transition-property: '+type+';\
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-moz-transition-duration: '+ms+'ms;\
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-o-transition-property: '+type+';\
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-o-transition-duration: '+ms+'ms;\
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-ms-transition-property: '+type+';\
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-ms-transition-duration: '+ms+'ms;';
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};
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var getWindowSize = function (element) {
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if (window.innerWidth && window.innerHeight) {
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var width = window.innerWidth;
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var height = window.innerHeight;
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} else if (document.compatMode === "CSS1Compat" && document.documentElement && document.documentElement.offsetWidth) {
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var width = document.documentElement.offsetWidth;
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var height = document.documentElement.offsetHeight;
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} else if (document.body && document.body.offsetWidth) {
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var width = document.body.offsetWidth;
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var height = document.body.offsetHeight;
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}
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if (element) {
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var width = element.offsetWidth;
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}
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return {
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width: width,
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height: height
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};
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};
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})(); |