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File: assets/plugins/holder.js

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File: assets/plugins/holder.js
Role: Auxiliary data
Content type: text/plain
Description: Auxiliary data
Class: YAF Base
Base structure for YAF framework based apps
Author: By
Last change:
Date: 6 years ago
Size: 20,260 bytes
 

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/*! Holder - 2.3.2 - client side image placeholders (c) 2012-2014 Ivan Malopinsky / http://imsky.co Provided under the MIT License. Commercial use requires attribution. */ var Holder = Holder || {}; (function (app, win) { var system_config = { use_svg: false, use_canvas: false, use_fallback: false }; var instance_config = {}; var preempted = false; canvas = document.createElement('canvas'); var dpr = 1, bsr = 1; var resizable_images = []; if (!canvas.getContext) { system_config.use_fallback = true; } else { if (canvas.toDataURL("image/png") .indexOf("data:image/png") < 0) { //Android doesn't support data URI system_config.use_fallback = true; } else { var ctx = canvas.getContext("2d"); } } if(!!document.createElementNS && !!document.createElementNS('http://www.w3.org/2000/svg', 'svg').createSVGRect){ system_config.use_svg = true; system_config.use_canvas = false; } if(!system_config.use_fallback){ dpr = window.devicePixelRatio || 1, bsr = ctx.webkitBackingStorePixelRatio || ctx.mozBackingStorePixelRatio || ctx.msBackingStorePixelRatio || ctx.oBackingStorePixelRatio || ctx.backingStorePixelRatio || 1; } var ratio = dpr / bsr; var settings = { domain: "holder.js", images: "img", bgnodes: ".holderjs", themes: { "gray": { background: "#eee", foreground: "#aaa", size: 12 }, "social": { background: "#3a5a97", foreground: "#fff", size: 12 }, "industrial": { background: "#434A52", foreground: "#C2F200", size: 12 }, "sky": { background: "#0D8FDB", foreground: "#fff", size: 12 }, "vine": { background: "#39DBAC", foreground: "#1E292C", size: 12 }, "lava": { background: "#F8591A", foreground: "#1C2846", size: 12 } }, stylesheet: "" }; app.flags = { dimensions: { regex: /^(\d+)x(\d+)$/, output: function (val) { var exec = this.regex.exec(val); return { width: +exec[1], height: +exec[2] } } }, fluid: { regex: /^([0-9%]+)x([0-9%]+)$/, output: function (val) { var exec = this.regex.exec(val); return { width: exec[1], height: exec[2] } } }, colors: { regex: /#([0-9a-f]{3,})\:#([0-9a-f]{3,})/i, output: function (val) { var exec = this.regex.exec(val); return { size: settings.themes.gray.size, foreground: "#" + exec[2], background: "#" + exec[1] } } }, text: { regex: /text\:(.*)/, output: function (val) { return this.regex.exec(val)[1]; } }, font: { regex: /font\:(.*)/, output: function (val) { return this.regex.exec(val)[1]; } }, auto: { regex: /^auto$/ }, textmode: { regex: /textmode\:(.*)/, output: function(val){ return this.regex.exec(val)[1]; } } } function text_size(width, height, template) { height = parseInt(height, 10); width = parseInt(width, 10); var bigSide = Math.max(height, width) var smallSide = Math.min(height, width) var scale = 1 / 12; var newHeight = Math.min(smallSide * 0.75, 0.75 * bigSide * scale); return { height: Math.round(Math.max(template.size, newHeight)) } } var svg_el = (function(){ //Prevent IE <9 from initializing SVG renderer if(!window.XMLSerializer) return; var serializer = new XMLSerializer(); var svg_ns = "http://www.w3.org/2000/svg" var svg = document.createElementNS(svg_ns, "svg"); //IE throws an exception if this is set and Chrome requires it to be set if(svg.webkitMatchesSelector){ svg.setAttribute("xmlns", "http://www.w3.org/2000/svg") } var bg_el = document.createElementNS(svg_ns, "rect") var text_el = document.createElementNS(svg_ns, "text") var textnode_el = document.createTextNode(null) text_el.setAttribute("text-anchor", "middle") text_el.appendChild(textnode_el) svg.appendChild(bg_el) svg.appendChild(text_el) return function(props){ svg.setAttribute("width",props.width); svg.setAttribute("height", props.height); bg_el.setAttribute("width", props.width); bg_el.setAttribute("height", props.height); bg_el.setAttribute("fill", props.template.background); text_el.setAttribute("x", props.width/2) text_el.setAttribute("y", props.height/2) textnode_el.nodeValue=props.text text_el.setAttribute("style", css_properties({ "fill": props.template.foreground, "font-weight": "bold", "font-size": props.text_height+"px", "font-family":props.font, "dominant-baseline":"central" })) return serializer.serializeToString(svg) } })() function css_properties(props){ var ret = []; for(p in props){ if(props.hasOwnProperty(p)){ ret.push(p+":"+props[p]) } } return ret.join(";") } function draw_canvas(args) { var ctx = args.ctx, dimensions = args.dimensions, template = args.template, ratio = args.ratio, holder = args.holder, literal = holder.textmode == "literal", exact = holder.textmode == "exact"; var ts = text_size(dimensions.width, dimensions.height, template); var text_height = ts.height; var width = dimensions.width * ratio, height = dimensions.height * ratio; var font = template.font ? template.font : "Arial,Helvetica,sans-serif"; canvas.width = width; canvas.height = height; ctx.textAlign = "center"; ctx.textBaseline = "middle"; ctx.fillStyle = template.background; ctx.fillRect(0, 0, width, height); ctx.fillStyle = template.foreground; ctx.font = "bold " + text_height + "px " + font; var text = template.text ? template.text : (Math.floor(dimensions.width) + "x" + Math.floor(dimensions.height)); if (literal) { var dimensions = holder.dimensions; text = dimensions.width + "x" + dimensions.height; } else if(exact && holder.exact_dimensions){ var dimensions = holder.exact_dimensions; text = (Math.floor(dimensions.width) + "x" + Math.floor(dimensions.height)); } var text_width = ctx.measureText(text).width; if (text_width / width >= 0.75) { text_height = Math.floor(text_height * 0.75 * (width / text_width)); } //Resetting font size if necessary ctx.font = "bold " + (text_height * ratio) + "px " + font; ctx.fillText(text, (width / 2), (height / 2), width); return canvas.toDataURL("image/png"); } function draw_svg(args){ var dimensions = args.dimensions, template = args.template, holder = args.holder, literal = holder.textmode == "literal", exact = holder.textmode == "exact"; var ts = text_size(dimensions.width, dimensions.height, template); var text_height = ts.height; var width = dimensions.width, height = dimensions.height; var font = template.font ? template.font : "Arial,Helvetica,sans-serif"; var text = template.text ? template.text : (Math.floor(dimensions.width) + "x" + Math.floor(dimensions.height)); if (literal) { var dimensions = holder.dimensions; text = dimensions.width + "x" + dimensions.height; } else if(exact && holder.exact_dimensions){ var dimensions = holder.exact_dimensions; text = (Math.floor(dimensions.width) + "x" + Math.floor(dimensions.height)); } var string = svg_el({ text: text, width:width, height:height, text_height:text_height, font:font, template:template }) return "data:image/svg+xml;base64,"+btoa(unescape(encodeURIComponent(string))); } function draw(args) { if(instance_config.use_canvas && !instance_config.use_svg){ return draw_canvas(args); } else{ return draw_svg(args); } } function render(mode, el, holder, src) { var dimensions = holder.dimensions, theme = holder.theme, text = holder.text ? decodeURIComponent(holder.text) : holder.text; var dimensions_caption = dimensions.width + "x" + dimensions.height; theme = (text ? extend(theme, { text: text }) : theme); theme = (holder.font ? extend(theme, { font: holder.font }) : theme); el.setAttribute("data-src", src); holder.theme = theme; el.holder_data = holder; if (mode == "image") { el.setAttribute("alt", text ? text : theme.text ? theme.text + " [" + dimensions_caption + "]" : dimensions_caption); if (instance_config.use_fallback || !holder.auto) { el.style.width = dimensions.width + "px"; el.style.height = dimensions.height + "px"; } if (instance_config.use_fallback) { el.style.backgroundColor = theme.background; } else { el.setAttribute("src", draw({ctx: ctx, dimensions: dimensions, template: theme, ratio:ratio, holder: holder})); if(holder.textmode && holder.textmode == "exact"){ resizable_images.push(el); resizable_update(el); } } } else if (mode == "background") { if (!instance_config.use_fallback) { el.style.backgroundImage = "url(" + draw({ctx:ctx, dimensions: dimensions, template: theme, ratio: ratio, holder: holder}) + ")"; el.style.backgroundSize = dimensions.width + "px " + dimensions.height + "px"; } } else if (mode == "fluid") { el.setAttribute("alt", text ? text : theme.text ? theme.text + " [" + dimensions_caption + "]" : dimensions_caption); if (dimensions.height.slice(-1) == "%") { el.style.height = dimensions.height } else if(holder.auto == null || !holder.auto){ el.style.height = dimensions.height + "px" } if (dimensions.width.slice(-1) == "%") { el.style.width = dimensions.width } else if(holder.auto == null || !holder.auto){ el.style.width = dimensions.width + "px" } if (el.style.display == "inline" || el.style.display === "" || el.style.display == "none") { el.style.display = "block"; } set_initial_dimensions(el) if (instance_config.use_fallback) { el.style.backgroundColor = theme.background; } else { resizable_images.push(el); resizable_update(el); } } } function dimension_check(el, callback) { var dimensions = { height: el.clientHeight, width: el.clientWidth }; if (!dimensions.height && !dimensions.width) { el.setAttribute("data-holder-invisible", true) callback.call(this, el) } else{ el.removeAttribute("data-holder-invisible") return dimensions; } } function set_initial_dimensions(el){ if(el.holder_data){ var dimensions = dimension_check(el, app.invisible_error_fn( set_initial_dimensions)) if(dimensions){ var holder = el.holder_data; holder.initial_dimensions = dimensions; holder.fluid_data = { fluid_height: holder.dimensions.height.slice(-1) == "%", fluid_width: holder.dimensions.width.slice(-1) == "%", mode: null } if(holder.fluid_data.fluid_width && !holder.fluid_data.fluid_height){ holder.fluid_data.mode = "width" holder.fluid_data.ratio = holder.initial_dimensions.width / parseFloat(holder.dimensions.height) } else if(!holder.fluid_data.fluid_width && holder.fluid_data.fluid_height){ holder.fluid_data.mode = "height"; holder.fluid_data.ratio = parseFloat(holder.dimensions.width) / holder.initial_dimensions.height } } } } function resizable_update(element) { var images; if (element.nodeType == null) { images = resizable_images; } else { images = [element] } for (var i in images) { if (!images.hasOwnProperty(i)) { continue; } var el = images[i] if (el.holder_data) { var holder = el.holder_data; var dimensions = dimension_check(el, app.invisible_error_fn( resizable_update)) if(dimensions){ if(holder.fluid){ if(holder.auto){ switch(holder.fluid_data.mode){ case "width": dimensions.height = dimensions.width / holder.fluid_data.ratio; break; case "height": dimensions.width = dimensions.height * holder.fluid_data.ratio; break; } } el.setAttribute("src", draw({ ctx: ctx, dimensions: dimensions, template: holder.theme, ratio: ratio, holder: holder })) } if(holder.textmode && holder.textmode == "exact"){ holder.exact_dimensions = dimensions; el.setAttribute("src", draw({ ctx: ctx, dimensions: holder.dimensions, template: holder.theme, ratio: ratio, holder: holder })) } } } } } function parse_flags(flags, options) { var ret = { theme: extend(settings.themes.gray, {}) }; var render = false; for (var fl = flags.length, j = 0; j < fl; j++) { var flag = flags[j]; if (app.flags.dimensions.match(flag)) { render = true; ret.dimensions = app.flags.dimensions.output(flag); } else if (app.flags.fluid.match(flag)) { render = true; ret.dimensions = app.flags.fluid.output(flag); ret.fluid = true; } else if (app.flags.textmode.match(flag)) { ret.textmode = app.flags.textmode.output(flag) } else if (app.flags.colors.match(flag)) { ret.theme = app.flags.colors.output(flag); } else if (options.themes[flag]) { //If a theme is specified, it will override custom colors if(options.themes.hasOwnProperty(flag)){ ret.theme = extend(options.themes[flag], {}); } } else if (app.flags.font.match(flag)) { ret.font = app.flags.font.output(flag); } else if (app.flags.auto.match(flag)) { ret.auto = true; } else if (app.flags.text.match(flag)) { ret.text = app.flags.text.output(flag); } } return render ? ret : false; } for (var flag in app.flags) { if (!app.flags.hasOwnProperty(flag)) continue; app.flags[flag].match = function (val) { return val.match(this.regex) } } app.invisible_error_fn = function(fn){ return function(el){ if(el.hasAttribute("data-holder-invisible")){ throw new Error("Holder: invisible placeholder") } } } app.add_theme = function (name, theme) { name != null && theme != null && (settings.themes[name] = theme); return app; }; app.add_image = function (src, el) { var node = selector(el); if (node.length) { for (var i = 0, l = node.length; i < l; i++) { var img = document.createElement("img") img.setAttribute("data-src", src); node[i].appendChild(img); } } return app; }; app.run = function (o) { instance_config = extend({}, system_config) preempted = true; var options = extend(settings, o), images = [], imageNodes = [], bgnodes = []; if(options.use_canvas != null && options.use_canvas){ instance_config.use_canvas = true; instance_config.use_svg = false; } if (typeof (options.images) == "string") { imageNodes = selector(options.images); } else if (window.NodeList && options.images instanceof window.NodeList) { imageNodes = options.images; } else if (window.Node && options.images instanceof window.Node) { imageNodes = [options.images]; } else if(window.HTMLCollection && options.images instanceof window.HTMLCollection){ imageNodes = options.images } if (typeof (options.bgnodes) == "string") { bgnodes = selector(options.bgnodes); } else if (window.NodeList && options.elements instanceof window.NodeList) { bgnodes = options.bgnodes; } else if (window.Node && options.bgnodes instanceof window.Node) { bgnodes = [options.bgnodes]; } for (i = 0, l = imageNodes.length; i < l; i++) images.push(imageNodes[i]); var holdercss = document.getElementById("holderjs-style"); if (!holdercss) { holdercss = document.createElement("style"); holdercss.setAttribute("id", "holderjs-style"); holdercss.type = "text/css"; document.getElementsByTagName("head")[0].appendChild(holdercss); } if (!options.nocss) { if (holdercss.styleSheet) { holdercss.styleSheet.cssText += options.stylesheet; } else { if(options.stylesheet.length){ holdercss.appendChild(document.createTextNode(options.stylesheet)); } } } var cssregex = new RegExp(options.domain + "\/(.*?)\"?\\)"); for (var l = bgnodes.length, i = 0; i < l; i++) { var src = window.getComputedStyle(bgnodes[i], null) .getPropertyValue("background-image"); var flags = src.match(cssregex); var bgsrc = bgnodes[i].getAttribute("data-background-src"); if (flags) { var holder = parse_flags(flags[1].split("/"), options); if (holder) { render("background", bgnodes[i], holder, src); } } else if (bgsrc != null) { var holder = parse_flags(bgsrc.substr(bgsrc.lastIndexOf(options.domain) + options.domain.length + 1) .split("/"), options); if (holder) { render("background", bgnodes[i], holder, src); } } } for (l = images.length, i = 0; i < l; i++) { var attr_data_src, attr_src; attr_src = attr_data_src = src = null; try { attr_src = images[i].getAttribute("src"); attr_datasrc = images[i].getAttribute("data-src"); } catch (e) {} if (attr_datasrc == null && !! attr_src && attr_src.indexOf(options.domain) >= 0) { src = attr_src; } else if ( !! attr_datasrc && attr_datasrc.indexOf(options.domain) >= 0) { src = attr_datasrc; } if (src) { var holder = parse_flags(src.substr(src.lastIndexOf(options.domain) + options.domain.length + 1).split("/"), options); if (holder) { if (holder.fluid) { render("fluid", images[i], holder, src) } else { render("image", images[i], holder, src); } } } } return app; }; contentLoaded(win, function () { if (window.addEventListener) { window.addEventListener("resize", resizable_update, false); window.addEventListener("orientationchange", resizable_update, false); } else { window.attachEvent("onresize", resizable_update) } preempted || app.run({}); if (typeof window.Turbolinks === "object") { document.addEventListener("page:change", function() { app.run({}) }) } }); if (typeof define === "function" && define.amd) { define([], function () { return app; }); } //github.com/davidchambers/Base64.js (function(){function t(t){this.message=t}var e="undefined"!=typeof exports?exports:this,r="ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";t.prototype=Error(),t.prototype.name="InvalidCharacterError",e.btoa||(e.btoa=function(e){for(var o,n,a=0,i=r,c="";e.charAt(0|a)||(i="=",a%1);c+=i.charAt(63&o>>8-8*(a%1))){if(n=e.charCodeAt(a+=.75),n>255)throw new t("'btoa' failed");o=o<<8|n}return c}),e.atob||(e.atob=function(e){if(e=e.replace(/=+$/,""),1==e.length%4)throw new t("'atob' failed");for(var o,n,a=0,i=0,c="";n=e.charAt(i++);~n&&(o=a%4?64*o+n:n,a++%4)?c+=String.fromCharCode(255&o>>(6&-2*a)):0)n=r.indexOf(n);return c})})(); //getElementsByClassName polyfill document.getElementsByClassName||(document.getElementsByClassName=function(e){var t=document,n,r,i,s=[];if(t.querySelectorAll)return t.querySelectorAll("."+e);if(t.evaluate){r=".//*[contains(concat(' ', @class, ' '), ' "+e+" ')]",n=t.evaluate(r,t,null,0,null);while(i=n.iterateNext())s.push(i)}else{n=t.getElementsByTagName("*"),r=new RegExp("(^|\\s)"+e+"(\\s|$)");for(i=0;i<n.length;i++)r.test(n[i].className)&&s.push(n[i])}return s}) //getComputedStyle polyfill window.getComputedStyle||(window.getComputedStyle=function(e){return this.el=e,this.getPropertyValue=function(t){var n=/(\-([a-z]){1})/g;return t=="float"&&(t="styleFloat"),n.test(t)&&(t=t.replace(n,function(){return arguments[2].toUpperCase()})),e.currentStyle[t]?e.currentStyle[t]:null},this}) //http://javascript.nwbox.com/ContentLoaded by Diego Perini with modifications function contentLoaded(n,t){var l="complete",s="readystatechange",u=!1,h=u,c=!0,i=n.document,a=i.documentElement,e=i.addEventListener?"addEventListener":"attachEvent",v=i.addEventListener?"removeEventListener":"detachEvent",f=i.addEventListener?"":"on",r=function(e){(e.type!=s||i.readyState==l)&&((e.type=="load"?n:i)[v](f+e.type,r,u),!h&&(h=!0)&&t.call(n,null))},o=function(){try{a.doScroll("left")}catch(n){setTimeout(o,50);return}r("poll")};if(i.readyState==l)t.call(n,"lazy");else{if(i.createEventObject&&a.doScroll){try{c=!n.frameElement}catch(y){}c&&o()}i[e](f+"DOMContentLoaded",r,u),i[e](f+s,r,u),n[e](f+"load",r,u)}} //https://gist.github.com/991057 by Jed Schmidt with modifications function selector(a,b){var a=a.match(/^(\W)?(.*)/),b=b||document,c=b["getElement"+(a[1]?"#"==a[1]?"ById":"sByClassName":"sByTagName")],d=c.call(b,a[2]),e=[];return null!==d&&(e=d.length||0===d.length?d:[d]),e} //shallow object property extend function extend(a,b){ var c={}; for(var i in a){ if(a.hasOwnProperty(i)){ c[i]=a[i]; } } for(var i in b){ if(b.hasOwnProperty(i)){ c[i]=b[i]; } } return c } //hasOwnProperty polyfill if (!Object.prototype.hasOwnProperty) /*jshint -W001, -W103 */ Object.prototype.hasOwnProperty = function(prop) { var proto = this.__proto__ || this.constructor.prototype; return (prop in this) && (!(prop in proto) || proto[prop] !== this[prop]); } /*jshint +W001, +W103 */ })(Holder, window);