diff options
author | Thomas Park <thomas@thomaspark.me> | 2013-10-30 16:13:42 -0400 |
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committer | Thomas Park <thomas@thomaspark.me> | 2013-10-30 16:13:42 -0400 |
commit | 48c64127b37be4a692a70cb7b38ed9744163582b (patch) | |
tree | dcf4b4b76612269a6b135c695861eca7e89a0cfa /bower_components/bootstrap/docs-assets/js/holder.js | |
parent | 620e501c3d804b1dc2c7d796d7ae378db5e1a040 (diff) |
3.0.0 -> 3.0.1
Diffstat (limited to 'bower_components/bootstrap/docs-assets/js/holder.js')
-rwxr-xr-x | bower_components/bootstrap/docs-assets/js/holder.js | 404 |
1 files changed, 404 insertions, 0 deletions
diff --git a/bower_components/bootstrap/docs-assets/js/holder.js b/bower_components/bootstrap/docs-assets/js/holder.js new file mode 100755 index 00000000..ebeb3c52 --- /dev/null +++ b/bower_components/bootstrap/docs-assets/js/holder.js @@ -0,0 +1,404 @@ +/* + +Holder - 2.1 - client side image placeholders +(c) 2012-2013 Ivan Malopinsky / http://imsky.co + +Provided under the MIT License. +Commercial use requires attribution. + +*/ + +var Holder = Holder || {}; +(function (app, win) { + +var preempted = false, +fallback = false, +canvas = document.createElement('canvas'); + +if (!canvas.getContext) { + fallback = true; +} else { + if (canvas.toDataURL("image/png") + .indexOf("data:image/png") < 0) { + //Android doesn't support data URI + fallback = true; + } else { + var ctx = canvas.getContext("2d"); + } +} + +var dpr = 1, bsr = 1; + +if(!fallback){ + dpr = window.devicePixelRatio || 1, + bsr = ctx.webkitBackingStorePixelRatio || ctx.mozBackingStorePixelRatio || ctx.msBackingStorePixelRatio || ctx.oBackingStorePixelRatio || ctx.backingStorePixelRatio || 1; +} + +var ratio = dpr / bsr; + +//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){ + a=a.match(/^(\W)?(.*)/);var b=document["getElement"+(a[1]?a[1]=="#"?"ById":"sByClassName":"sByTagName")](a[2]); + var ret=[]; b!==null&&(b.length?ret=b:b.length===0?ret=b:ret=[b]); return ret; +} + +//shallow object property extend +function extend(a,b){var c={};for(var d in a)c[d]=a[d];for(var e in b)c[e]=b[e];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 */ + +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)) + } +} + +function draw(ctx, dimensions, template, ratio, literal) { + 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 : "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) { + text = template.literalText; + } + 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 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); + theme.literalText = dimensions_caption; + holder.originalTheme = holder.theme; + holder.theme = theme; + + if (mode == "image") { + el.setAttribute("alt", text ? text : theme.text ? theme.text + " [" + dimensions_caption + "]" : dimensions_caption); + if (fallback || !holder.auto) { + el.style.width = dimensions.width + "px"; + el.style.height = dimensions.height + "px"; + } + if (fallback) { + el.style.backgroundColor = theme.background; + } else { + el.setAttribute("src", draw(ctx, dimensions, theme, ratio)); + } + } else if (mode == "background") { + if (!fallback) { + el.style.backgroundImage = "url(" + draw(ctx, dimensions, theme, ratio) + ")"; + 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 { + el.style.height = dimensions.height + "px" + } + if (dimensions.width.slice(-1) == "%") { + el.style.width = dimensions.width + } else { + el.style.width = dimensions.width + "px" + } + if (el.style.display == "inline" || el.style.display === "") { + el.style.display = "block"; + } + if (fallback) { + el.style.backgroundColor = theme.background; + } else { + el.holderData = holder; + fluid_images.push(el); + fluid_update(el); + } + } +} + +function fluid_update(element) { + var images; + if (element.nodeType == null) { + images = fluid_images; + } else { + images = [element] + } + for (var i in images) { + var el = images[i] + if (el.holderData) { + var holder = el.holderData; + el.setAttribute("src", draw(ctx, { + height: el.clientHeight, + width: el.clientWidth + }, holder.theme, ratio, !! holder.literal)); + } + } +} + +function parse_flags(flags, options) { + var ret = { + theme: settings.themes.gray + }; + var render = false; + for (sl = flags.length, j = 0; j < sl; 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.literal.match(flag)) { + ret.literal = true; + } 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 + ret.theme = 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; +} +var fluid_images = []; +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 + } + }, + 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%]+)$/, + output: function (val) { + var exec = this.regex.exec(val); + return { + width: exec[1], + height: exec[2] + } + } + }, + colors: { + regex: /#([0-9a-f]{3,})\:#([0-9a-f]{3,})/i, + output: function (val) { + var exec = this.regex.exec(val); + return { + size: settings.themes.gray.size, + foreground: "#" + exec[2], + background: "#" + exec[1] + } + } + }, + text: { + regex: /text\:(.*)/, + output: function (val) { + return this.regex.exec(val)[1]; + } + }, + font: { + regex: /font\:(.*)/, + output: function (val) { + return this.regex.exec(val)[1]; + } + }, + auto: { + regex: /^auto$/ + }, + literal: { + regex: /^literal$/ + } +} +for (var flag in app.flags) { + if (!app.flags.hasOwnProperty(flag)) continue; + app.flags[flag].match = function (val) { + return val.match(this.regex) + } +} +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) { + var options = extend(settings, o), + images = [], + imageNodes = [], + bgnodes = []; + 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]; + } + 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]; + } + preempted = true; + 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 { + 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", fluid_update, false); + window.addEventListener("orientationchange", fluid_update, false); + } else { + window.attachEvent("onresize", fluid_update) + } + preempted || app.run(); +}); +if (typeof define === "function" && define.amd) { + define([], function () { + return app; + }); +} + +})(Holder, window); |