/*

     File: SampleController.m 

 Abstract: Main controller object for the CallJS sample. 

  Version: 1.1 

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 */

#import "SampleController.h"

@implementation SampleController

    /* storage management for our sharedValue instance variable.  The other

    instance variables are taken care of by the nib loading process, so we don't

    manage them here.

    */

-(id) init {

    self = [super init];

    if (self) {

        sharedValue = [[NSString alloc] initWithString:@"okay"];

    }

    return self;

}

- (void) dealloc {

    self.sharedValue = nil;

    [super dealloc];

}

    /* accessor methods for our sharedValue instance variable.  If you watch the run log

    you'll see that JavaScript does NOT use these accessors for setting and getting the

    shared field value.  This may be an important consideration for you if you are

    relying on KVC accessors to add some special processing surrounding your instance

    variable access.

    */

- (NSString *)sharedValue {

    NSLog(@"%@ received %@", self, NSStringFromSelector(_cmd));

    return [[sharedValue retain] autorelease];

}

- (void)setSharedValue:(NSString *)value {

    NSLog(@"%@ received %@", self, NSStringFromSelector(_cmd));

    if (sharedValue != value) {

        [sharedValue release];

        sharedValue = [value copy];

    }

}

    /* called when our nib is loaded into memory and ready for action.

    Here, we initialize our web view and load in the initial html.

    */

- (void) awakeFromNib {

    NSLog(@"%@ received %@", self, NSStringFromSelector(_cmd));

    NSLog(@"app plugins path = '%@'", [[NSBundle mainBundle] builtInPlugInsPath]);

        /* set ourself to the app's delegate so our

        applicationShouldTerminateAfterLastWindowClosed

        method will be called. */

    [NSApp setDelegate: self];

        /* set self as UI and Resource Load delegate for our WebView */

    [theWebView setUIDelegate: self];

    [theWebView setResourceLoadDelegate: self];

        /* Ask webKit to load the test.html file from our resources directory. */

    [[theWebView mainFrame] loadRequest:

        [NSURLRequest requestWithURL:

            [NSURL fileURLWithPath:

                [[NSBundle mainBundle] pathForResource:@"test" ofType:@"html"]]]];

}

    /* this NSApplication delegate method will allow our application

    to 'quit' when the user closes the main window.

    */

- (BOOL)applicationShouldTerminateAfterLastWindowClosed:(NSApplication *)sender {

    return YES;  /* quit when main window is closed */

}

    /* this message is sent to the WebView's frame load delegate 

    when the page is ready for JavaScript.  It will be called just after 

    the page has loaded, but just before any JavaScripts start running on the

    page.  This is the perfect time to install any of your own JavaScript

    objects on the page.

    */

- (void)webView:(WebView *)webView windowScriptObjectAvailable:(WebScriptObject *)windowScriptObject {

    NSLog(@"%@ received %@", self, NSStringFromSelector(_cmd));

        /* here we'll add our object to the window object as an object named

        'console'.  We can use this object in JavaScript by referencing the 'console'

        property of the 'window' object.   */

    [windowScriptObject setValue:self forKey:@"console"];

}

    /* sent to the WebView's ui delegate when alert() is called in JavaScript.

    If you call alert() in your JavaScript methods, it will call this

    method and display the alert message in the log.  In Safari, this method

    displays an alert that presents the message to the user.

    */

- (void)webView:(WebView *)sender runJavaScriptAlertPanelWithMessage:(NSString *)message {

    NSLog(@"%@ received %@ with '%@'", self, NSStringFromSelector(_cmd), message);

}

    /* This method is called when the 'Call JavaScript Function' button

    is pressed in the UI.  Here, we retrieve the parameters

    from the two text fields in the UI, build a parameter list, and then

    we call through to the JavaScript function named 'SampleFunction'.

    The result returned by SampleFunction is displayed in the UI.

    callWebScriptMethod:withArguments: is available in Mac OS X 10.3.9 and later.

    */

- (IBAction)callJavaScriptWithParameters:(id)sender {

    NSLog(@"%@ received %@", self, NSStringFromSelector(_cmd));

        /* set up the function arguments */

    NSArray* args = [NSArray arrayWithObjects:

            [paramOne stringValue],

            [paramTwo stringValue],

            nil];

        /* call the javascript function named SampleFunction */

    [callResult setStringValue:

        [[theWebView windowScriptObject] callWebScriptMethod:@"SampleFunction" withArguments:args]];

}

    /* This method is called when the 'Run JavaScript' button is pressed in the UI.

    Here, we retrieve the JavaScript we want to run from the UI, run the script, and

    display the result in the UI.

    stringByEvaluatingJavaScriptFromString: is available in Mac OS X 10.2 (with

    Safari installed) and in Mac OS X 10.2.7 and later.

    */

- (IBAction)runJavaScript:(id)sender {

    NSLog(@"%@ received %@", self, NSStringFromSelector(_cmd));

    [runResult setStringValue:

        [theWebView stringByEvaluatingJavaScriptFromString:[[scriptText textStorage] string]]];

}

    /* the following three methods are used to determine 

    what methods on our object are exposed to JavaScript */

    /* This method is called by the WebView when it is deciding what

    methods on this object can be called by JavaScript.  The method

    should return NO the methods we would like to be able to call from

    JavaScript, and YES for all of the methods that cannot be called

    from JavaScript.

    */

+ (BOOL)isSelectorExcludedFromWebScript:(SEL)selector {

    NSLog(@"%@ received %@ for '%@'", self, NSStringFromSelector(_cmd), NSStringFromSelector(selector));

    if (selector == @selector(doOutputToLog:)

    || selector == @selector(changeJavaScriptText:)

    || selector == @selector(reportSharedValue)) {

        return NO;

    }

    return YES;

}

    /* This method is called by the WebView to decide what instance

    variables should be shared with JavaScript.  The method should

    return NO for all of the instance variables that should be shared

    between JavaScript and Objective-C, and YES for all others.

    */

+ (BOOL)isKeyExcludedFromWebScript:(const char *)property {

    NSLog(@"%@ received %@ for '%s'", self, NSStringFromSelector(_cmd), property);

    if (strcmp(property, "sharedValue") == 0) {

        return NO;

    }

    return YES;

}

    /* This method converts a selector value into the name we'll be using

    to refer to it in JavaScript.  here, we are providing the following

    Objective-C to JavaScript name mappings:

        'doOutputToLog:' => 'log'

        'changeJavaScriptText:' => 'setscript'

    With these mappings in place, a JavaScript call to 'console.log' will

    call through to the doOutputToLog: Objective-C method, and a JavaScript call

    to console.setscript will call through to the changeJavaScriptText:

    Objective-C method.  

    Comments for the webScriptNameForSelector: method in WebScriptObject.h talk more

    about the default name conversions performed from Objective-C to JavaScript names.

    You can overrride those defaults by providing your own translations in your

    webScriptNameForSelector: method.

    */

+ (NSString *) webScriptNameForSelector:(SEL)sel {

    NSLog(@"%@ received %@ with sel='%@'", self, NSStringFromSelector(_cmd), NSStringFromSelector(sel));

    if (sel == @selector(doOutputToLog:)) {

        return @"log";

    } else if (sel == @selector(changeJavaScriptText:)) {

        return @"setscript";

    /*

        NOTE:  for the console.report method, we do not need to perform a name translation

        because the Objective-C method name is already the same as the method name

        we will be using in JavaScript.  We have left this part commented out to show

        that the name translation here would be redundant.

    } else if (sel == @selector(report)) {

        return @"report";

    */

    } else {

        return nil;

    }

}

    /* Here is our Objective-C implementation for the JavaScript console.log() method.

    */

- (void) doOutputToLog: (NSString*) theMessage {

    NSLog(@"%@ received %@ with message=%@", self, NSStringFromSelector(_cmd), theMessage);

        /* write the message to the log */

    NSLog(@"LOG: %@", theMessage);

}

    /* Here is our Objective-C implementation for the JavaScript console.setscript() method.

    */

- (NSString*) changeJavaScriptText: (NSString*) theScriptText {

    NSLog(@"%@ received %@ with script=%@", self, NSStringFromSelector(_cmd), theScriptText);

        /* set the script text to the parameter */

    [scriptText setString: theScriptText];

        /* return a result to display in the status field */

    return @"okay";

}

    /* Here is our Objective-C implementation for the JavaScript console.report() method.

    Mote that this Objective-C method uses the same name as the JavaScript method.  In cases

    where your Objective-C methods do not have any parameters, you can use the automatic name

    sharing performed by WebKit.

    */

- (void) report {

    NSLog(@"%@ received %@", self, NSStringFromSelector(_cmd));

        /* write the message to the log */

    NSLog(@"sharedValue = %@", self.sharedValue);

}

@end