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/* Authors:
* Petr Vobornik <pvoborni@redhat.com>
*
* Copyright (C) 2012 Red Hat
* see file 'COPYING' for use and warranty information
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
define(['dojo/_base/declare',
'dojo/_base/lang',
'dojo/Evented',
'dojo/router'
],
function(declare, lang, Evented, router) {
/**
* Router
*
* This component keeps menu and routes in sync. It signalizes
* other components to display facet by sending 'show-facet' event.
* Other components can use navigate_to_* methods to change currently
* displayed facet. This change can be canceled in 'facet-change'
* event handler.
* @class navigation.Router
*/
var navigation = declare([Evented], {
/**
* Holds references to register route handlers.
* Can be used for unregistering routes.
* @property {Array.<Function>}
*/
route_handlers: [],
/**
* Prefix of all routes for this navigation. Useful for multiple
* navigation objects in one application.
* @property {string}
*/
route_prefix: '',
/**
* Used during facet changing. Set it to true in 'facet-change'
* event handler to stop the change.
* @property {boolean}
*/
canceled: false,
/**
* Flag to indicate that next hash change should not invoke showing a
* facet.
* Main purpose: updating hash.
* @property {boolean}
*/
ignore_next: false,
/**
* Register a route-handler pair to a dojo.router
* Handler will be run in context of this object
*
* @param {string|Array.<string>} route or routes to register
* @param {Function} handler to be associated with the route(s)
*/
register_route: function(route, handler) {
if (route instanceof Array) {
for (var i=0, l=route.length; i<l; i++) {
this.register_route(route[i], handler);
}
} else {
var r = this.route_prefix + route;
this.route_handlers.push(router.register(r, lang.hitch(this, handler)));
}
},
/**
* Navigate to given hash
*
* @fires facet-change
* @fires facet-change-canceled
*/
navigate_to_hash: function(hash, facet) {
this.canceled = false;
this.emit('facet-change', { facet: facet, hash: hash });
if (this.canceled) {
this.emit('facet-change-canceled', { facet: facet, hash : hash });
return false;
}
this.update_hash(hash, false);
return true;
},
/**
* Changes hash to supplied
*
* @param {string} Hash to set
* @param {boolean} Whether to suppress following hash change handler
*/
update_hash: function(hash, ignore_change) {
if (window.location.hash === "#" + hash) return;
this.ignore_next = !!ignore_change;
router.go(hash);
},
/**
* Returns and resets `ignore_next` property.
*/
check_clear_ignore: function() {
var ignore = this.ignore_next;
this.ignore_next = false;
return ignore;
},
/**
* Tells other component to show given facet.
*/
show_facet: function(facet) {
this.emit('facet-show', {
facet: facet
});
},
/**
* Raise 'error'
* @protected
* @fires error
*/
_error: function(msg, type, context) {
this.emit('error', {
message: msg,
type: type,
context: context
});
},
/**
* Starts routing
*/
startup: function() {
router.startup();
},
constructor: function(spec) {
spec = spec || {};
}
});
return navigation;
});
|
