/*

 * Copyright (C) 2006 Apple Computer, Inc.  All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 *

 * 1.  Redistributions of source code must retain the above copyright

 *     notice, this list of conditions and the following disclaimer. 

 * 2.  Redistributions in binary form must reproduce the above copyright

 *     notice, this list of conditions and the following disclaimer in the

 *     documentation and/or other materials provided with the distribution. 

 * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of

 *     its contributors may be used to endorse or promote products derived

 *     from this software without specific prior written permission. 

 *

 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY

 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED

 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE

 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY

 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES

 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;

    * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND

 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF

 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

 */

#import <WebKit/WebFrame.h>

#import <WebKit/WebScriptObject.h>

#import "NavigationController.h"

@implementation NavigationController

+ (BOOL)isSelectorExcludedFromWebScript:(SEL)selector

{

    if (selector == @selector(evaluateWebScript:afterBackForwardNavigation:))

        return NO;

    return YES;

}

+ (NSString *)webScriptNameForSelector:(SEL)selector

{

    if (selector == @selector(evaluateWebScript:afterBackForwardNavigation:))

        return @"evalAfterBackForwardNavigation";

    return nil;

}

- (void)setPendingScript:(NSString *)script

{

    if (script != pendingScript) {

        [pendingScript release];

        pendingScript = [script copy];

    }

}

- (void)setPendingRequest:(NSURLRequest *)request

{

    if (request != pendingRequest) {

        [pendingRequest release];

        pendingRequest = [request copy];

    }

}

- (void)evaluateWebScript:(NSString *)script afterBackForwardNavigation:(NSString *)navigation

{

    // Allow both arguments to be optional

    if (![script isKindOfClass:[NSString class]])

        script = @"";

    if (![navigation isKindOfClass:[NSString class]])

        navigation = @"about:blank";

    [self setPendingScript:script];

    [self setPendingRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:navigation]]];

    pendingAction = Load;

}

- (void)webView:(WebView *)sender didFinishLoadForFrame:(WebFrame *)frame

{

    if (frame == [[frame webView] mainFrame]) {

        switch (pendingAction) {

            case Load:

                pendingAction = GoBack;

                [frame loadRequest:pendingRequest];

                [self setPendingRequest:nil];

                break;

            case GoBack:

                pendingAction = ExecuteScript;

                [[frame webView] goBack];

                break;

            case ExecuteScript:

                pendingAction = None;

                [[[frame webView] windowScriptObject] evaluateWebScript:pendingScript];

                [self setPendingScript:nil];

                break;

            case None:

            default:

                break;

        }

    }

}

- (void)dealloc

{

    [self setPendingScript:nil];

    [self setPendingRequest:nil];

    [super dealloc];

}

@end