try { console.log; } catch (e) { window.console = undefined; } (function($) { var namespaces = {}; $.entwine = function() { $.fn.entwine.apply(null, arguments); }; /** * A couple of utility functions for accessing the store outside of this closure, and for making things * operate in a little more easy-to-test manner */ $.extend($.entwine, { /** * Get all the namespaces. Useful for introspection? Internal interface of Namespace not guaranteed consistant */ namespaces: namespaces, /** * Remove all entwine rules */ clear_all_rules: function() { // Remove proxy functions for (var k in $.fn) { if ($.fn[k].isentwinemethod) delete $.fn[k]; } // Remove bound events - TODO: Make this pluggable, so this code can be moved to jquery.entwine.events.js $(document).unbind('.entwine'); // Remove namespaces, and start over again namespaces = $.entwine.namespaces = {}; }, WARN_LEVEL_NONE: 0, WARN_LEVEL_IMPORTANT: 1, WARN_LEVEL_BESTPRACTISE: 2, /** * Warning level. Set to a higher level to get warnings dumped to console. */ warningLevel: 0, /** Utility to optionally display warning messages depending on level */ warn: function(message, level) { if (level <= $.entwine.warningLevel && console && console.warn) { console.warn(message); if (console.trace) console.trace(); } }, warn_exception: function(where, /* optional: */ on, e) { if ($.entwine.WARN_LEVEL_IMPORTANT <= $.entwine.warningLevel && console && console.warn) { if (arguments.length == 2) { e = on; on = null; } if (on) console.warn('Uncaught exception',e,'in',where,'on',on); else console.warn('Uncaught exception',e,'in',where); if (e.stack) console.warn("Stack Trace:\n" + e.stack); } } }); /** Stores a count of definitions, so that we can sort identical selectors by definition order */ var rulecount = 0; var Rule = Base.extend({ init: function(selector, name) { this.selector = selector; this.specifity = selector.specifity(); this.important = 0; this.name = name; this.rulecount = rulecount++; } }); Rule.compare = function(a, b) { var as = a.specifity, bs = b.specifity; return (a.important - b.important) || (as[0] - bs[0]) || (as[1] - bs[1]) || (as[2] - bs[2]) || (a.rulecount - b.rulecount) ; }; $.entwine.RuleList = function() { var list = []; list.addRule = function(selector, name){ var rule = Rule(selector, name); list[list.length] = rule; list.sort(Rule.compare); return rule; }; return list; }; var handlers = []; /** * A Namespace holds all the information needed for adding entwine methods to a namespace (including the _null_ namespace) */ $.entwine.Namespace = Base.extend({ init: function(name){ if (name && !name.match(/^[A-Za-z0-9.]+$/)) $.entwine.warn('Entwine namespace '+name+' is not formatted as period seperated identifiers', $.entwine.WARN_LEVEL_BESTPRACTISE); name = name || '__base'; this.name = name; this.store = {}; namespaces[name] = this; if (name == "__base") { this.injectee = $.fn; this.$ = $; } else { // We're in a namespace, so we build a Class that subclasses the jQuery Object Class to inject namespace functions into // jQuery 1.5 already provides a nice way to subclass, so use it if ($.sub) { this.$ = $.sub(); this.injectee = this.$.prototype; } // For jQuery < 1.5 we have to do it ourselves else { var subfn = function(){}; this.injectee = subfn.prototype = new $; // And then we provide an overriding $ that returns objects of our new Class, and an overriding pushStack to catch further selection building var bound$ = this.$ = function(a) { // Try the simple way first var jq = $.fn.init.apply(new subfn(), arguments); if (jq instanceof subfn) return jq; // That didn't return a bound object, so now we need to copy it var rv = new subfn(); rv.selector = jq.selector; rv.context = jq.context; var i = rv.length = jq.length; while (i--) rv[i] = jq[i]; return rv; }; this.injectee.pushStack = function(elems, name, selector){ var ret = bound$(elems); // Add the old object onto the stack (as a reference) ret.prevObject = this; ret.context = this.context; if ( name === "find" ) ret.selector = this.selector + (this.selector ? " " : "") + selector; else if ( name ) ret.selector = this.selector + "." + name + "(" + selector + ")"; // Return the newly-formed element set return ret; }; // Copy static functions through from $ to this.$ so e.g. $.ajax still works // @bug, @cantfix: Any class functions added to $ after this call won't get mirrored through $.extend(this.$, $); } // We override entwine to inject the name of this namespace when defining blocks inside this namespace var entwine_wrapper = this.injectee.entwine = function(spacename) { var args = arguments; if (!spacename || typeof spacename != 'string') { args = $.makeArray(args); args.unshift(name); } else if (spacename.charAt(0) != '.') args[0] = name+'.'+spacename; return $.fn.entwine.apply(this, args); }; this.$.entwine = function() { entwine_wrapper.apply(null, arguments); }; for (var i = 0; i < handlers.length; i++) { var handler = handlers[i], builder; // Inject jQuery object method overrides if (builder = handler.namespaceMethodOverrides) { var overrides = builder(this); for (var k in overrides) this.injectee[k] = overrides[k]; } // Inject $.entwine function overrides if (builder = handler.namespaceStaticOverrides) { var overrides = builder(this); for (var k in overrides) this.$.entwine[k] = overrides[k]; } } } }, /** * Returns a function that does selector matching against the function list for a function name * Used by proxy for all calls, and by ctorProxy to handle _super calls * @param {String} name - name of the function as passed in the construction object * @param {String} funcprop - the property on the Rule object that gives the actual function to call * @param {function} basefunc - the non-entwine function to use as the catch-all function at the bottom of the stack */ one: function(name, funcprop, basefunc) { var namespace = this; var funcs = this.store[name]; var one = function(el, args, i){ if (i === undefined) i = funcs.length; while (i--) { if (funcs[i].selector.matches(el)) { var ret, tmp_i = el.i, tmp_f = el.f; el.i = i; el.f = one; try { ret = funcs[i][funcprop].apply(namespace.$(el), args); } finally { el.i = tmp_i; el.f = tmp_f; } return ret; } } // If we didn't find a entwine-defined function, but there is a non-entwine function to use as a base, try that if (basefunc) return basefunc.apply(namespace.$(el), args); }; return one; }, /** * A proxy is a function attached to a callable object (either the base jQuery.fn or a subspace object) which handles * finding and calling the correct function for each member of the current jQuery context * @param {String} name - name of the function as passed in the construction object * @param {function} basefunc - the non-entwine function to use as the catch-all function at the bottom of the stack */ build_proxy: function(name, basefunc) { var one = this.one(name, 'func', basefunc); var prxy = function() { var rv, ctx = $(this); var i = ctx.length; while (i--) rv = one(ctx[i], arguments); return rv; }; return prxy; }, bind_proxy: function(selector, name, func) { var rulelist = this.store[name] || (this.store[name] = $.entwine.RuleList()); var rule = rulelist.addRule(selector, name); rule.func = func; if (!this.injectee.hasOwnProperty(name) || !this.injectee[name].isentwinemethod) { this.injectee[name] = this.build_proxy(name, this.injectee.hasOwnProperty(name) ? this.injectee[name] : null); this.injectee[name].isentwinemethod = true; } if (!this.injectee[name].isentwinemethod) { $.entwine.warn('Warning: Entwine function '+name+' clashes with regular jQuery function - entwine function will not be callable directly on jQuery object', $.entwine.WARN_LEVEL_IMPORTANT); } }, add: function(selector, data) { // For every item in the hash, try ever method handler, until one returns true for (var k in data) { var v = data[k]; for (var i = 0; i < handlers.length; i++) { if (handlers[i].bind && handlers[i].bind.call(this, selector, k, v)) break; } } }, has: function(ctx, name) { var rulelist = this.store[name]; if (!rulelist) return false; /* We go forward this time, since low specifity is likely to knock out a bunch of elements quickly */ for (var i = 0 ; i < rulelist.length; i++) { ctx = ctx.not(rulelist[i].selector); if (!ctx.length) return true; } return false; } }); /** * A handler is some javascript code that adds support for some time of key / value pair passed in the hash to the Namespace add method. * The default handlers provided (and included by default) are event, ctor and properties */ $.entwine.Namespace.addHandler = function(handler) { for (var i = 0; i < handlers.length && handlers[i].order < handler.order; i++) { /* Pass */ } handlers.splice(i, 0, handler); }; $.entwine.Namespace.addHandler({ order: 50, bind: function(selector, k, v){ if ($.isFunction(v)) { this.bind_proxy(selector, k, v); return true; } } }); $.extend($.fn, { /** * Main entwine function. Used for new definitions, calling into a namespace (or forcing the base namespace) and entering a using block * */ entwine: function(spacename) { var i = 0; /* Don't actually work out selector until we try and define something on it - we might be opening a namespace on an function-traveresed object which have non-standard selectors like .parents(.foo).slice(0,1) */ var selector = null; /* By default we operator on the base namespace */ var namespace = namespaces.__base || $.entwine.Namespace(); /* If the first argument is a string, then it's the name of a namespace. Look it up */ if (typeof spacename == 'string') { if (spacename.charAt('0') == '.') spacename = spacename.substr(1); if (spacename) namespace = namespaces[spacename] || $.entwine.Namespace(spacename); i=1; } /* All remaining arguments should either be using blocks or definition hashs */ while (i < arguments.length) { var res = arguments[i++]; // If it's a function, call it - either it's a using block or it's a namespaced entwine definition if ($.isFunction(res)) { if (res.length != 1) $.entwine.warn('Function block inside entwine definition does not take $ argument properly', $.entwine.WARN_LEVEL_IMPORTANT); res = res.call(namespace.$(this), namespace.$); } // If we have a entwine definition hash, inject it into namespace if (res) { if (selector === null) selector = this.selector ? $.selector(this.selector) : false; if (selector) namespace.add(selector, res); else $.entwine.warn('Entwine block given to entwine call without selector. Make sure you call $(selector).entwine when defining blocks', $.entwine.WARN_LEVEL_IMPORTANT); } } /* Finally, return the jQuery object 'this' refers to, wrapped in the new namespace */ return namespace.$(this); }, /** * Calls the next most specific version of the current entwine method */ _super: function(){ var rv, i = this.length; while (i--) { var el = this[0]; rv = el.f(el, arguments, el.i); } return rv; } }); })(jQuery);