X-Git-Url: https://git.openstreetmap.org./rails.git/blobdiff_plain/35458c009652645972a9167d80aba1c4fdce82cf..0d490424e60c037fa32d05e554501d172dda355c:/app/assets/javascripts/router.js diff --git a/app/assets/javascripts/router.js b/app/assets/javascripts/router.js index 654ec860b..d890f38a4 100644 --- a/app/assets/javascripts/router.js +++ b/app/assets/javascripts/router.js @@ -1,78 +1,185 @@ -OSM.Router = function(rts) { - var escapeRegExp = /[\-{}\[\]+?.,\\\^$|#\s]/g; +/* + OSM.Router implements pushState-based navigation for the main page and + other pages that use a sidebar+map based layout (export, search results, + history, and browse pages). + + For browsers without pushState, it falls back to full page loads, which all + of the above pages support. + + The router is initialized with a set of routes: a mapping of URL path templates + to route controller objects. Path templates can contain placeholders + (`/note/:id`) and optional segments (`/:type/:id(/history)`). + + Route controller objects can define four methods that are called at defined + times during routing: + + * The `load` method is called by the router when a path which matches the + route's path template is loaded via a normal full page load. It is passed + as arguments the URL path plus any matching arguments for placeholders + in the path template. + + * The `pushstate` method is called when a page which matches the route's path + template is loaded via pushState. It is passed the same arguments as `load`. + + * The `popstate` method is called when returning to a previously + pushState-loaded page via popstate (i.e. browser back/forward buttons). + + * The `unload` method is called on the exiting route controller when navigating + via pushState or popstate to another route. + + Note that while `load` is not called by the router for pushState-based loads, + it's frequently useful for route controllers to call it manually inside their + definition of the `pushstate` and `popstate` methods. + + An instance of OSM.Router is assigned to `OSM.router`. To navigate to a new page + via pushState (with automatic full-page load fallback), call `OSM.router.route`: + + OSM.router.route('/way/1234'); + + If `route` is passed a path that matches one of the path templates, it performs + the appropriate actions and returns true. Otherwise it returns false. + + OSM.Router also handles updating the hash portion of the URL containing transient + map state such as the position and zoom level. Some route controllers may wish to + temporarily suppress updating the hash (for example, to omit the hash on pages + such as `/way/1234` unless the map is moved). This can be done by using + `OSM.router.withoutMoveListener` to run a block of code that may update + move the map without the hash changing. + */ +OSM.Router = function (map, rts) { + var escapeRegExp = /[-{}[\]+?.,\\^$|#\s]/g; var optionalParam = /\((.*?)\)/g; - var namedParam = /(\(\?)?:\w+/g; - var splatParam = /\*\w+/g; + var namedParam = /(\(\?)?:\w+/g; + var splatParam = /\*\w+/g; function Route(path, controller) { - var regexp = new RegExp('^' + - path.replace(escapeRegExp, '\\$&') - .replace(optionalParam, '(?:$1)?') - .replace(namedParam, function(match, optional){ - return optional ? match : '([^\/]+)'; + var regexp = new RegExp("^" + + path.replace(escapeRegExp, "\\$&") + .replace(optionalParam, "(?:$1)?") + .replace(namedParam, function (match, optional) { + return optional ? match : "([^/]+)"; }) - .replace(splatParam, '(.*?)') + '(?:\\?.*)?$'); + .replace(splatParam, "(.*?)") + "(?:\\?.*)?$"); var route = {}; - route.match = function(path) { + route.match = function (path) { return regexp.test(path); }; - route.run = function(action, path) { + route.run = function (action, path) { var params = []; if (path) { - params = regexp.exec(path).map(function(param, i) { + params = regexp.exec(path).map(function (param, i) { return (i > 0 && param) ? decodeURIComponent(param) : param; }); } - (controller[action] || $.noop).apply(controller, params); + params = params.concat(Array.prototype.slice.call(arguments, 2)); + + return (controller[action] || $.noop).apply(controller, params); }; return route; } var routes = []; - for (var r in rts) - routes.push(Route(r, rts[r])); + for (var r in rts) { + routes.push(new Route(r, rts[r])); + } - routes.recognize = function(path) { + routes.recognize = function (path) { for (var i = 0; i < this.length; i++) { if (this[i].match(path)) return this[i]; } }; - var currentPath = window.location.pathname + window.location.search, - currentRoute = routes.recognize(currentPath); + var currentPath = window.location.pathname.replace(/(.)\/$/, "$1") + window.location.search, + currentRoute = routes.recognize(currentPath), + currentHash = location.hash || OSM.formatHash(map); - currentRoute.run('load', currentPath); + var router = {}; - if (window.history && window.history.pushState) { - $(window).on('popstate', function() { - var path = window.location.pathname + window.location.search; - if (path === currentPath) return; - currentRoute.run('unload'); - currentPath = path; - currentRoute = routes.recognize(currentPath); - currentRoute.run('popstate', currentPath); - }); + $(window).on("popstate", function (e) { + if (!e.originalEvent.state) return; // Is it a real popstate event or just a hash change? + var path = window.location.pathname + window.location.search, + route = routes.recognize(path); + if (path === currentPath) return; + currentRoute.run("unload", null, route === currentRoute); + currentPath = path; + currentRoute = route; + currentRoute.run("popstate", currentPath); + map.setState(e.originalEvent.state, { animate: false }); + }); - return function (url) { - var path = url.replace(/#.*/, ''), + router.route = function (url) { + var path = url.replace(/#.*/, ""), route = routes.recognize(path); - if (!route) return false; - window.history.pushState({}, document.title, url); - currentRoute.run('unload'); - currentPath = path; - currentRoute = route; - currentRoute.run('pushstate', currentPath); - return true; + if (!route) return false; + currentRoute.run("unload", null, route === currentRoute); + var state = OSM.parseHash(url); + map.setState(state); + window.history.pushState(state, document.title, url); + currentPath = path; + currentRoute = route; + currentRoute.run("pushstate", currentPath); + return true; + }; + + router.replace = function (url) { + window.history.replaceState(OSM.parseHash(url), document.title, url); + }; + + router.stateChange = function (state) { + if (state.center) { + window.history.replaceState(state, document.title, OSM.formatHash(state)); + } else { + window.history.replaceState(state, document.title, window.location); } - } else { - return function (url) { - window.location.assign(url); + }; + + router.updateHash = function () { + var hash = OSM.formatHash(map); + if (hash === currentHash) return; + currentHash = hash; + router.stateChange(OSM.parseHash(hash)); + }; + + router.hashUpdated = function () { + var hash = location.hash; + if (hash === currentHash) return; + currentHash = hash; + var state = OSM.parseHash(hash); + map.setState(state); + router.stateChange(state, hash); + }; + + router.withoutMoveListener = function (callback) { + function disableMoveListener() { + map.off("moveend", router.updateHash); + map.once("moveend", function () { + map.on("moveend", router.updateHash); + }); } - } + + map.once("movestart", disableMoveListener); + callback(); + map.off("movestart", disableMoveListener); + }; + + router.load = function () { + var loadState = currentRoute.run("load", currentPath); + router.stateChange(loadState || {}); + }; + + router.setCurrentPath = function (path) { + currentPath = path; + currentRoute = routes.recognize(currentPath); + }; + + map.on("moveend baselayerchange overlaylayerchange", router.updateHash); + $(window).on("hashchange", router.hashUpdated); + + return router; };