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/*
* LPLocationController.j
* LPKit
*
* Created by Ludwig Pettersson on November 21, 2009.
*
* The MIT License
*
* Copyright (c) 2009 Ludwig Pettersson
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*
*/
@import <Foundation/CPObject.j>
var sharedLocationControllerInstance = nil;
@implementation LPLocationController : CPObject
{
CPString currentHash;
CPArray observers;
}
+ (id)sharedLocationController
{
if (!sharedLocationControllerInstance)
sharedLocationControllerInstance = [[self alloc] init];
return sharedLocationControllerInstance;
}
- (id)init
{
if (self = [super init])
{
observers = [CPArray array];
currentHash = window.location.hash;
// Use onhashchange if that is available
if (typeof window.onhashchange !== "undefined")
{
window.onhashchange = function() {
[self updateLocation:nil];
};
}
// If not, use the ol' interval
else
{
[CPTimer scheduledTimerWithTimeInterval:0.1 target:self selector:@selector(updateLocation:) userInfo:nil repeats:YES];
}
}
return self;
}
- (CPString)formattedHash
{
return [window.location.hash substringFromIndex:1];
}
- (void)setLocation:(CPString)aLocation
{
window.location.hash = aLocation;
[self updateLocation:nil];
}
- (void)updateLocation:(id)sender
{
if (currentHash !== window.location.hash)
{
currentHash = window.location.hash;
var _formattedHash = [self formattedHash];
// Post notifications
for (var i = 0, length = observers.length; i < length; i++)
[observers[i][0] performSelector:observers[i][1] withObject:_formattedHash];
}
}
- (void)addObserver:(id)anObserver selector:(id)aSelector
{
// Save the observer
[observers addObject:[anObserver, aSelector]];
// Post a notification right away
[anObserver performSelector:aSelector withObject:[self formattedHash]];
}
@end
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