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/*
* Copyright 2010 Facebook
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/

#import <UIKit/UIKit.h>
#import "FBGraphUser.h"

@protocol FBLoginViewDelegate;

/*!
@typedef FBLoginViewLoggedInDisplayStyle enum
@abstract
Type used to specify the display style of the button.
@discussion
*/
typedef enum {
    /*! Small square profile image and facebook icon overlayed */
    FBLoginViewStyleSquareSmall = 0,
    
    /*! Large square profile image and facebook icon overlayed */
    FBLoginViewStyleSquareLarge = 1,
    
    /*! Facebook image and profile image side-by-side */
    FBLoginViewStyleHorizontal = 2,
        
} FBLoginViewStyle;

/*!
@class
@abstract
*/
@interface FBLoginView : UIView

/*!
@abstract
The display style for the login view.
*/
@property (nonatomic) FBLoginViewStyle style;

/*!
@abstract
The permissions to login with. Defaults to nil, meaning basic permissions.@property (readwrite, copy) NSArray *permissions;

*/
@property (readwrite, copy) NSArray *permissions;


/*!
@abstract
Initializes and returns an `FBLoginView` object. The underlying session has basic permissions granted to it.
*/
- (id)init;

/*!
@method
@abstract
Initializes and returns an `FBLoginView` object constructed with the specified permissions.
@param permissions An array of strings representing the permissions to request during the
authentication flow. A value of nil will indicates basic permissions.
*/
- (id)initWithPermissions:(NSArray *)permissions;

/*!
@abstract
The delegate object that receives updates for selection and display control.
*/
@property (nonatomic, assign) id<FBLoginViewDelegate> delegate;

@end

/*!
@protocol
@abstract
The `FBLoginViewDelegate` protocol defines the methods used to receive event
notifications from `FBLoginView` objects.
*/
@protocol FBLoginViewDelegate <NSObject>

@optional

/*!
@abstract
Tells the delegate that the view is now in logged in mode
@param loginView The login view that transitioned its view mode
*/
- (void)loginViewShowingLoggedInUser:(FBLoginView *)loginView;

/*!
@abstract
Tells the delegate that the view is has now fetched user info

@param loginView The login view that transitioned its view mode
@param user The user info object describing the logged in user
*/
- (void)loginViewFetchedUserInfo:(FBLoginView *)loginView
                            user:(id<FBGraphUser>)user;

/*!
@abstract
Tells the delegate that the view is now in logged out mode
@param loginView The login view that transitioned its view mode
*/
- (void)loginViewShowingLoggedOutUser:(FBLoginView *)loginView;

@end

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