mirror of
https://github.com/imsky/holder.git
synced 2026-04-21 03:01:19 -04:00
update site
This commit is contained in:
Ivan Malopinsky
73
holder.js
73
holder.js
@@ -1,19 +1,19 @@
|
||||
/*
|
||||
|
||||
Holder - client side image placeholders
|
||||
(c) 2012 Ivan Malopinsky / http://imsky.co
|
||||
|
||||
Provided under the Apache 2.0 License: http://www.apache.org/licenses/LICENSE-2.0
|
||||
Commercial use requires attribution.
|
||||
|
||||
|
||||
Holder - 1.2 - client side image placeholders
|
||||
(c) 2012 Ivan Malopinsky / http://imsky.co
|
||||
|
||||
Provided under the Apache 2.0 License: http://www.apache.org/licenses/LICENSE-2.0
|
||||
Commercial use requires attribution.
|
||||
|
||||
*/
|
||||
|
||||
var Holder = Holder || {};
|
||||
(function (app, win) {
|
||||
|
||||
|
||||
//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]);
|
||||
@@ -22,7 +22,7 @@ function selector(a){
|
||||
|
||||
//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}
|
||||
|
||||
|
||||
function draw(ctx, dimensions, template) {
|
||||
var dimension_arr = [dimensions.height, dimensions.width].sort();
|
||||
var maxFactor = Math.round(dimension_arr[1] / 16),
|
||||
@@ -36,7 +36,7 @@ function draw(ctx, dimensions, template) {
|
||||
ctx.fillRect(0, 0, dimensions.width, dimensions.height);
|
||||
ctx.fillStyle = template.foreground;
|
||||
ctx.font = "bold " + text_height + "px sans-serif";
|
||||
var text = dimensions.width + "x" + dimensions.height;
|
||||
var text = template.text ? template.text : (dimensions.width + "x" + dimensions.height);
|
||||
if (Math.round(ctx.measureText(text).width) / dimensions.width > 1) {
|
||||
text_height = Math.max(minFactor, template.size);
|
||||
}
|
||||
@@ -46,6 +46,7 @@ function draw(ctx, dimensions, template) {
|
||||
}
|
||||
var dimensions_regex = /([0-9]+)x([0-9]+)/;
|
||||
var hex_regex = /#([0-9a-f]{3,})\:#([0-9a-f]{3,})/i;
|
||||
var text_regex = /text\:(.*)/;
|
||||
var preempted = false,
|
||||
fallback = false;
|
||||
var canvas = document.createElement('canvas');
|
||||
@@ -59,6 +60,7 @@ if (!canvas.getContext) {
|
||||
var ctx = canvas.getContext("2d");
|
||||
}
|
||||
}
|
||||
|
||||
var settings = {
|
||||
domain: "holder.js",
|
||||
images: "img",
|
||||
@@ -79,11 +81,13 @@ var settings = {
|
||||
size: 12
|
||||
}
|
||||
}
|
||||
}
|
||||
};
|
||||
|
||||
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) {
|
||||
@@ -94,49 +98,60 @@ app.add_image = function (src, el) {
|
||||
}
|
||||
}
|
||||
return app;
|
||||
}
|
||||
};
|
||||
|
||||
app.run = function (o) {
|
||||
var options = extend(settings, o),
|
||||
images = selector(options.images),
|
||||
preempted = true;
|
||||
for (var l = images.length, i = 0; i < l; i++) {
|
||||
var dimensions, theme = settings.themes.gray;
|
||||
src = images[i].getAttribute("data-src") || images[i].getAttribute("src");
|
||||
var src = images[i].getAttribute("data-src") || images[i].getAttribute("src");
|
||||
if ( !! ~src.indexOf(options.domain)) {
|
||||
var render = false;
|
||||
for (var flags = src.substr(src.indexOf(options.domain) + options.domain.length + 1).split("/"), sl = flags.length, j = 0; j < sl; j++) {
|
||||
var exec;
|
||||
if (flags[j].match(dimensions_regex)) {
|
||||
var exec = dimensions_regex.exec(flags[j])
|
||||
exec = dimensions_regex.exec(flags[j]);
|
||||
dimensions = {
|
||||
width: parseInt(exec[1]),
|
||||
height: parseInt(exec[2])
|
||||
}
|
||||
width: +exec[1],
|
||||
height: +exec[2]
|
||||
};
|
||||
render = true;
|
||||
} else if (flags[j].match(hex_regex)) {
|
||||
var exec = hex_regex.exec(flags[j]);
|
||||
exec = hex_regex.exec(flags[j]);
|
||||
theme = {
|
||||
size: settings.themes.gray.size,
|
||||
foreground: "#" + exec[2],
|
||||
background: "#" + exec[1]
|
||||
}
|
||||
} else if (options.themes[flags[j]]) {
|
||||
};
|
||||
}
|
||||
else if (options.themes[flags[j]]) {
|
||||
theme = options.themes[flags[j]];
|
||||
}
|
||||
else if(flags[j].match(text_regex)){
|
||||
exec = text_regex.exec(flags[j]);
|
||||
theme.text = exec[1];
|
||||
}
|
||||
}
|
||||
if (render) {
|
||||
images[i].setAttribute("data-src", src);
|
||||
if (!fallback) {
|
||||
images[i].setAttribute("src", draw(ctx, dimensions, theme));
|
||||
} else {
|
||||
images[i].style.width = dimensions.width + "px";
|
||||
images[i].style.height = dimensions.height + "px";
|
||||
images[i].style.backgroundColor = theme.background;
|
||||
var dimensions_caption = dimensions.width+"x"+dimensions.height;
|
||||
images[i].setAttribute("alt", theme.text ? theme.text + " ["+dimensions_caption+"]" : dimensions_caption);
|
||||
|
||||
//Fallback
|
||||
images[i].style.width = dimensions.width + "px";
|
||||
images[i].style.height = dimensions.height + "px";
|
||||
images[i].style.backgroundColor = theme.background;
|
||||
|
||||
if(!fallback){
|
||||
images[i].setAttribute("src", draw(ctx, dimensions, theme));
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
return app;
|
||||
}
|
||||
};
|
||||
contentLoaded(win, function () {
|
||||
preempted || app.run()
|
||||
})
|
||||
|
||||
@@ -49,7 +49,7 @@ h2.ie {font:3em inherit;color:red;position:fixed;top:0px;margin:0;z-index:2;widt
|
||||
<p>
|
||||
It works both online and offline, and offers a chainable API to style and create placeholders with ease.
|
||||
</p>
|
||||
<a href="http://github.com/imsky/holder/zipball/v1.1" id="download">Download Holder.js (4KB)</a>
|
||||
<a href="http://github.com/imsky/holder/zipball/v1.2" id="download">Download Holder.js (5KB)</a>
|
||||
</div>
|
||||
<div class="block" id="details">
|
||||
<h2>Usage</h2>
|
||||
|
||||
Reference in New Issue
Block a user