fineui是帆软报表和BI产品线所使用的前端框架。
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(function () {
var Events = {
// Bind an event to a `callback` function. Passing `"all"` will bind
// the callback to all events fired.
on: function (name, callback, context) {
if (!eventsApi(this, "on", name, [callback, context]) || !callback) return this;
this._events || (this._events = {});
var events = this._events[name] || (this._events[name] = []);
events.push({callback: callback, context: context, ctx: context || this});
return this;
},
// Bind an event to only be triggered a single time. After the first time
// the callback is invoked, it will be removed.
once: function (name, callback, context) {
if (!eventsApi(this, "once", name, [callback, context]) || !callback) return this;
var self = this;
var once = _.once(function () {
self.off(name, once);
callback.apply(this, arguments);
});
once._callback = callback;
return this.on(name, once, context);
},
// Remove one or many callbacks. If `context` is null, removes all
// callbacks with that function. If `callback` is null, removes all
// callbacks for the event. If `name` is null, removes all bound
// callbacks for all events.
off: function (name, callback, context) {
if (!this._events || !eventsApi(this, "off", name, [callback, context])) return this;
// Remove all callbacks for all events.
if (!name && !callback && !context) {
this._events = void 0;
return this;
}
var names = name ? [name] : _.keys(this._events);
for (var i = 0, length = names.length; i < length; i++) {
name = names[i];
// Bail out if there are no events stored.
var events = this._events[name];
if (!events) continue;
// Remove all callbacks for this event.
if (!callback && !context) {
delete this._events[name];
continue;
}
// Find any remaining events.
var remaining = [];
for (var j = 0, k = events.length; j < k; j++) {
var event = events[j];
if (
callback && callback !== event.callback &&
callback !== event.callback._callback ||
context && context !== event.context
) {
remaining.push(event);
}
}
// Replace events if there are any remaining. Otherwise, clean up.
if (remaining.length) {
this._events[name] = remaining;
} else {
delete this._events[name];
}
}
return this;
},
un: function () {
this.off.apply(this, arguments);
},
// Trigger one or many events, firing all bound callbacks. Callbacks are
// passed the same arguments as `trigger` is, apart from the event name
// (unless you're listening on `"all"`, which will cause your callback to
// receive the true name of the event as the first argument).
trigger: function (name) {
if (!this._events) return this;
var args = slice.call(arguments, 1);
if (!eventsApi(this, "trigger", name, args)) return this;
var events = this._events[name];
var allEvents = this._events.all;
if (events) triggerEvents(events, args);
if (allEvents) triggerEvents(allEvents, arguments);
return this;
},
fireEvent: function () {
this.trigger.apply(this, arguments);
},
// Inversion-of-control versions of `on` and `once`. Tell *this* object to
// listen to an event in another object ... keeping track of what it's
// listening to.
listenTo: function (obj, name, callback) {
var listeningTo = this._listeningTo || (this._listeningTo = {});
var id = obj._listenId || (obj._listenId = _.uniqueId("l"));
listeningTo[id] = obj;
if (!callback && typeof name === "object") callback = this;
obj.on(name, callback, this);
return this;
},
listenToOnce: function (obj, name, callback) {
if (typeof name === "object") {
for (var event in name) this.listenToOnce(obj, event, name[event]);
return this;
}
if (eventSplitter.test(name)) {
var names = name.split(eventSplitter);
for (var i = 0, length = names.length; i < length; i++) {
this.listenToOnce(obj, names[i], callback);
}
return this;
}
if (!callback) return this;
var once = _.once(function () {
this.stopListening(obj, name, once);
callback.apply(this, arguments);
});
once._callback = callback;
return this.listenTo(obj, name, once);
},
// Tell this object to stop listening to either specific events ... or
// to every object it's currently listening to.
stopListening: function (obj, name, callback) {
var listeningTo = this._listeningTo;
if (!listeningTo) return this;
var remove = !name && !callback;
if (!callback && typeof name === "object") callback = this;
if (obj) (listeningTo = {})[obj._listenId] = obj;
for (var id in listeningTo) {
obj = listeningTo[id];
obj.off(name, callback, this);
if (remove || _.isEmpty(obj._events)) delete this._listeningTo[id];
}
return this;
}
};
// Regular expression used to split event strings.
var eventSplitter = /\s+/;
// Implement fancy features of the Events API such as multiple event
// names `"change blur"` and jQuery-style event maps `{change: action}`
// in terms of the existing API.
var eventsApi = function (obj, action, name, rest) {
if (!name) return true;
// Handle event maps.
if (typeof name === "object") {
for (var key in name) {
obj[action].apply(obj, [key, name[key]].concat(rest));
}
return false;
}
// Handle space separated event names.
if (eventSplitter.test(name)) {
var names = name.split(eventSplitter);
for (var i = 0, length = names.length; i < length; i++) {
obj[action].apply(obj, [names[i]].concat(rest));
}
return false;
}
return true;
};
// A difficult-to-believe, but optimized internal dispatch function for
// triggering events. Tries to keep the usual cases speedy (most internal
// BI events have 3 arguments).
var triggerEvents = function (events, args) {
var ev, i = -1, l = events.length, a1 = args[0], a2 = args[1], a3 = args[2];
switch (args.length) {
case 0:
while (++i < l) (ev = events[i]).callback.call(ev.ctx);
return;
case 1:
while (++i < l) (ev = events[i]).callback.call(ev.ctx, a1);
return;
case 2:
while (++i < l) (ev = events[i]).callback.call(ev.ctx, a1, a2);
return;
case 3:
while (++i < l) (ev = events[i]).callback.call(ev.ctx, a1, a2, a3);
return;
default:
while (++i < l) (ev = events[i]).callback.apply(ev.ctx, args);
return;
}
};
// BI.Router
// ---------------
// Routers map faux-URLs to actions, and fire events when routes are
// matched. Creating a new one sets its `routes` hash, if not set statically.
var Router = BI.Router = function (options) {
options || (options = {});
if (options.routes) this.routes = options.routes;
this._bindRoutes();
this._init.apply(this, arguments);
};
// Cached regular expressions for matching named param parts and splatted
// parts of route strings.
var optionalParam = /\((.*?)\)/g;
var namedParam = /(\(\?)?:\w+/g;
var splatParam = /\*\w+/g;
var escapeRegExp = /[\-{}\[\]+?.,\\\^$|#\s]/g;
// Set up all inheritable **BI.Router** properties and methods.
_.extend(Router.prototype, Events, {
// _init is an empty function by default. Override it with your own
// initialization logic.
_init: function () {
},
// Manually bind a single named route to a callback. For example:
//
// this.route('search/:query/p:num', 'search', function(query, num) {
// ...
// });
//
route: function (route, name, callback) {
if (!_.isRegExp(route)) route = this._routeToRegExp(route);
if (_.isFunction(name)) {
callback = name;
name = "";
}
if (!callback) callback = this[name];
var router = this;
BI.history.route(route, function (fragment) {
var args = router._extractParameters(route, fragment);
if (router.execute(callback, args, name) !== false) {
router.trigger.apply(router, ["route:" + name].concat(args));
router.trigger("route", name, args);
BI.history.trigger("route", router, name, args);
}
});
return this;
},
// Execute a route handler with the provided parameters. This is an
// excellent place to do pre-route setup or post-route cleanup.
execute: function (callback, args, name) {
if (callback) callback.apply(this, args);
},
// Simple proxy to `BI.history` to save a fragment into the history.
navigate: function (fragment, options) {
BI.history.navigate(fragment, options);
return this;
},
// Bind all defined routes to `BI.history`. We have to reverse the
// order of the routes here to support behavior where the most general
// routes can be defined at the bottom of the route map.
_bindRoutes: function () {
if (!this.routes) return;
this.routes = _.result(this, "routes");
var route, routes = _.keys(this.routes);
while ((route = routes.pop()) != null) {
this.route(route, this.routes[route]);
}
},
// Convert a route string into a regular expression, suitable for matching
// against the current location hash.
_routeToRegExp: function (route) {
route = route.replace(escapeRegExp, "\\$&")
.replace(optionalParam, "(?:$1)?")
.replace(namedParam, function (match, optional) {
return optional ? match : "([^/?]+)";
})
.replace(splatParam, "([^?]*?)");
return new RegExp("^" + route + "(?:\\?([\\s\\S]*))?$");
},
// Given a route, and a URL fragment that it matches, return the array of
// extracted decoded parameters. Empty or unmatched parameters will be
// treated as `null` to normalize cross-browser behavior.
_extractParameters: function (route, fragment) {
var params = route.exec(fragment).slice(1);
return _.map(params, function (param, i) {
// Don't decode the search params.
if (i === params.length - 1) return param || null;
return param ? decodeURIComponent(param) : null;
});
}
});
// History
// ----------------
// Handles cross-browser history management, based on either
// [pushState](http://diveintohtml5.info/history.html) and real URLs, or
// [onhashchange](https://developer.mozilla.org/en-US/docs/DOM/window.onhashchange)
// and URL fragments. If the browser supports neither (old IE, natch),
// falls back to polling.
var History = function () {
this.handlers = [];
_.bindAll(this, "checkUrl");
// Ensure that `History` can be used outside of the browser.
if (typeof window !== "undefined") {
this.location = window.location;
this.history = window.history;
}
};
// Cached regex for stripping a leading hash/slash and trailing space.
var routeStripper = /^[#\/]|\s+$/g;
// Cached regex for stripping leading and trailing slashes.
var rootStripper = /^\/+|\/+$/g;
// Cached regex for stripping urls of hash.
var pathStripper = /#.*$/;
// Has the history handling already been started?
History.started = false;
// Set up all inheritable **BI.History** properties and methods.
_.extend(History.prototype, Events, {
// The default interval to poll for hash changes, if necessary, is
// twenty times a second.
interval: 50,
// Are we at the app root?
atRoot: function () {
var path = this.location.pathname.replace(/[^\/]$/, "$&/");
return path === this.root && !this.getSearch();
},
// In IE6, the hash fragment and search params are incorrect if the
// fragment contains `?`.
getSearch: function () {
var match = this.location.href.replace(/#.*/, "").match(/\?.+/);
return match ? match[0] : "";
},
// Gets the true hash value. Cannot use location.hash directly due to bug
// in Firefox where location.hash will always be decoded.
getHash: function (window) {
var match = (window || this).location.href.match(/#(.*)$/);
return match ? match[1] : "";
},
// Get the pathname and search params, without the root.
getPath: function () {
var path = decodeURI(this.location.pathname + this.getSearch());
var root = this.root.slice(0, -1);
if (!path.indexOf(root)) path = path.slice(root.length);
return path.charAt(0) === "/" ? path.slice(1) : path;
},
// Get the cross-browser normalized URL fragment from the path or hash.
getFragment: function (fragment) {
if (fragment == null) {
if (this._hasPushState || !this._wantsHashChange) {
fragment = this.getPath();
} else {
fragment = this.getHash();
}
}
return fragment.replace(routeStripper, "");
},
// Start the hash change handling, returning `true` if the current URL matches
// an existing route, and `false` otherwise.
start: function (options) {
if (History.started) throw new Error("BI.history has already been started");
History.started = true;
// Figure out the initial configuration. Do we need an iframe?
// Is pushState desired ... is it available?
this.options = _.extend({root: "/"}, this.options, options);
this.root = this.options.root;
this._wantsHashChange = this.options.hashChange !== false;
this._hasHashChange = "onhashchange" in window;
this._wantsPushState = !!this.options.pushState;
this._hasPushState = !!(this.options.pushState && this.history && this.history.pushState);
this.fragment = this.getFragment();
// Normalize root to always include a leading and trailing slash.
this.root = ("/" + this.root + "/").replace(rootStripper, "/");
// Transition from hashChange to pushState or vice versa if both are
// requested.
if (this._wantsHashChange && this._wantsPushState) {
// If we've started off with a route from a `pushState`-enabled
// browser, but we're currently in a browser that doesn't support it...
if (!this._hasPushState && !this.atRoot()) {
var root = this.root.slice(0, -1) || "/";
this.location.replace(root + "#" + this.getPath());
// Return immediately as browser will do redirect to new url
return true;
// Or if we've started out with a hash-based route, but we're currently
// in a browser where it could be `pushState`-based instead...
} else if (this._hasPushState && this.atRoot()) {
this.navigate(this.getHash(), {replace: true});
}
}
// Proxy an iframe to handle location events if the browser doesn't
// support the `hashchange` event, HTML5 history, or the user wants
// `hashChange` but not `pushState`.
if (!this._hasHashChange && this._wantsHashChange && (!this._wantsPushState || !this._hasPushState)) {
var iframe = document.createElement("iframe");
iframe.src = "javascript:0";
iframe.style.display = "none";
iframe.tabIndex = -1;
var body = document.body;
// Using `appendChild` will throw on IE < 9 if the document is not ready.
this.iframe = body.insertBefore(iframe, body.firstChild).contentWindow;
this.iframe.document.open().close();
this.iframe.location.hash = "#" + this.fragment;
}
// Add a cross-platform `addEventListener` shim for older browsers.
var addEventListener = window.addEventListener || function (eventName, listener) {
return attachEvent("on" + eventName, listener);
};
// Depending on whether we're using pushState or hashes, and whether
// 'onhashchange' is supported, determine how we check the URL state.
if (this._hasPushState) {
addEventListener("popstate", this.checkUrl, false);
} else if (this._wantsHashChange && this._hasHashChange && !this.iframe) {
addEventListener("hashchange", this.checkUrl, false);
} else if (this._wantsHashChange) {
this._checkUrlInterval = setInterval(this.checkUrl, this.interval);
}
if (!this.options.silent) return this.loadUrl();
},
// Disable BI.history, perhaps temporarily. Not useful in a real app,
// but possibly useful for unit testing Routers.
stop: function () {
// Add a cross-platform `removeEventListener` shim for older browsers.
var removeEventListener = window.removeEventListener || function (eventName, listener) {
return detachEvent("on" + eventName, listener);
};
// Remove window listeners.
if (this._hasPushState) {
removeEventListener("popstate", this.checkUrl, false);
} else if (this._wantsHashChange && this._hasHashChange && !this.iframe) {
removeEventListener("hashchange", this.checkUrl, false);
}
// Clean up the iframe if necessary.
if (this.iframe) {
document.body.removeChild(this.iframe.frameElement);
this.iframe = null;
}
// Some environments will throw when clearing an undefined interval.
if (this._checkUrlInterval) clearInterval(this._checkUrlInterval);
History.started = false;
},
// Add a route to be tested when the fragment changes. Routes added later
// may override previous routes.
route: function (route, callback) {
this.handlers.unshift({route: route, callback: callback});
},
// Checks the current URL to see if it has changed, and if it has,
// calls `loadUrl`, normalizing across the hidden iframe.
checkUrl: function (e) {
var current = this.getFragment();
// If the user pressed the back button, the iframe's hash will have
// changed and we should use that for comparison.
if (current === this.fragment && this.iframe) {
current = this.getHash(this.iframe);
}
if (current === this.fragment) return false;
if (this.iframe) this.navigate(current);
this.loadUrl();
},
// Attempt to load the current URL fragment. If a route succeeds with a
// match, returns `true`. If no defined routes matches the fragment,
// returns `false`.
loadUrl: function (fragment) {
fragment = this.fragment = this.getFragment(fragment);
return _.any(this.handlers, function (handler) {
if (handler.route.test(fragment)) {
handler.callback(fragment);
return true;
}
});
},
// Save a fragment into the hash history, or replace the URL state if the
// 'replace' option is passed. You are responsible for properly URL-encoding
// the fragment in advance.
//
// The options object can contain `trigger: true` if you wish to have the
// route callback be fired (not usually desirable), or `replace: true`, if
// you wish to modify the current URL without adding an entry to the history.
navigate: function (fragment, options) {
if (!History.started) return false;
if (!options || options === true) options = {trigger: !!options};
// Normalize the fragment.
fragment = this.getFragment(fragment || "");
// Don't include a trailing slash on the root.
var root = this.root;
if (fragment === "" || fragment.charAt(0) === "?") {
root = root.slice(0, -1) || "/";
}
var url = root + fragment;
// Strip the hash and decode for matching.
fragment = decodeURI(fragment.replace(pathStripper, ""));
if (this.fragment === fragment) return;
this.fragment = fragment;
// If pushState is available, we use it to set the fragment as a real URL.
if (this._hasPushState) {
this.history[options.replace ? "replaceState" : "pushState"]({}, document.title, url);
// If hash changes haven't been explicitly disabled, update the hash
// fragment to store history.
} else if (this._wantsHashChange) {
this._updateHash(this.location, fragment, options.replace);
if (this.iframe && (fragment !== this.getHash(this.iframe))) {
// Opening and closing the iframe tricks IE7 and earlier to push a
// history entry on hash-tag change. When replace is true, we don't
// want this.
if (!options.replace) this.iframe.document.open().close();
this._updateHash(this.iframe.location, fragment, options.replace);
}
// If you've told us that you explicitly don't want fallback hashchange-
// based history, then `navigate` becomes a page refresh.
} else {
return this.location.assign(url);
}
if (options.trigger) return this.loadUrl(fragment);
},
// Update the hash location, either replacing the current entry, or adding
// a new one to the browser history.
_updateHash: function (location, fragment, replace) {
if (replace) {
var href = location.href.replace(/(javascript:|#).*$/, "");
location.replace(href + "#" + fragment);
} else {
// Some browsers require that `hash` contains a leading #.
location.hash = "#" + fragment;
}
}
});
// Create the default BI.history.
BI.history = new History;
}());