154 lines
4.8 KiB
HTML
154 lines
4.8 KiB
HTML
<script>
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(function(exports) {
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exports = exports || {};
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var handlers = {}, createChain, add;
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createChain = function (context, stack, lastMethod) {
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var inHandler = context.halt = false;
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//The default error handler
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context.error = function (e) {
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throw e;
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};
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//Run the next method in the chain
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context.next = function (exit) {
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if (exit) {
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inHandler = false;
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}
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if (!context.halt && stack && stack.length) {
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var args = stack.shift(), method = args.shift();
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inHandler = true;
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try {
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handlers[method].apply(context, [args, args.length, method]);
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} catch (e) {
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context.error(e);
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}
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}
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return context;
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};
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//Bind each method to the context
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for (var alias in handlers) {
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if (typeof context[alias] === 'function') {
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continue;
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}
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(function (alias) {
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context[alias] = function () {
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var args = Array.prototype.slice.call(arguments);
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if (alias === 'onError') {
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if (stack) {
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handlers.onError.apply(context, [args, args.length]);
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return context;
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}
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var new_context = {};
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handlers.onError.apply(new_context, [args, args.length]);
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return createChain(new_context, null, 'onError');
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}
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args.unshift(alias);
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if (!stack) {
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return createChain({}, [args], alias);
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}
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context.then = context[alias];
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stack.push(args);
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return inHandler ? context : context.next();
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};
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}(alias));
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}
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//'then' is an alias for the last method that was called
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if (lastMethod) {
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context.then = context[lastMethod];
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}
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//Used to call run(), chain() or another existing method when defining a new method
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//See load.js (https://github.com/chriso/load.js/blob/master/load.js) for an example
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context.call = function (method, args) {
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args.unshift(method);
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stack.unshift(args);
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context.next(true);
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};
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return context.next();
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};
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//Add a custom method/handler (see below)
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add = exports.addMethod = function (method /*, alias1, alias2, ..., callback */) {
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var args = Array.prototype.slice.call(arguments),
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handler = args.pop();
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for (var i = 0, len = args.length; i < len; i++) {
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if (typeof args[i] === 'string') {
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handlers[args[i]] = handler;
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}
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}
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//When no aliases have been defined, automatically add 'then<Method>'
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//e.g. adding 'run' also adds 'thenRun' as a method
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if (!--len) {
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handlers['then' + method.substr(0,1).toUpperCase() + method.substr(1)] = handler;
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}
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createChain(exports);
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};
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//run() - Run each function in parallel and progress once all functions are complete
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add('run', function (args, arg_len) {
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var self = this, chain = function () {
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if (self.halt) {
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return;
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} else if (!--arg_len) {
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self.next(true);
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}
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};
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var error = function (e) {
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self.error(e);
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};
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for (var i = 0, len = arg_len; !self.halt && i < len; i++) {
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if (null != args[i].call(self, chain, error)) {
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chain();
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}
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}
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});
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}(this));
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var head = document.getElementsByTagName('head')[0] || document.documentElement;
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addMethod('load', function (args, argc) {
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for (var queue = [], i = 0; i < argc; i++) {
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(function (i) {
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queue.push(asyncLoadScript(args[i]));
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}(i));
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}
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this.call('run', queue);
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});
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function asyncLoadScript(src) {
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return function (onload, onerror) {
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console.log('still ok');
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var script = document.createElement('script');
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script.src = src;
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script.onload = onload;
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script.onerror = onerror;
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script.onreadystatechange = function () {
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console.log('no ok anymore');
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var state = this.readyState;
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if (state === 'loaded' || state === 'complete') {
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script.onreadystatechange = null;
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onload();
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}
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};
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head.insertBefore(script, head.firstChild);
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}
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}
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load('http://raw.github.com/bryanwoods/autolink-js/master/autolink.js').thenRun(function() {
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console.log("http://www.mozilla.com".autoLink());
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});
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</script>
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