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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/1999/REC-html401-19991224/loose.dtd">
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<a href="http://developer.apple.com/">ADC Home</a> > <a href="../../referencelibrary/index.html">Reference Library</a> > <a href="../../samplecode/index.html">Sample Code</a> > <a href="../../samplecode/Cocoa/index.html">Cocoa</a> > <a href="../../samplecode/Cocoa/idxInternetWeb-date.html">Internet & Web</a> > <A HREF="javascript:location.replace('index.html');">CallJS</A> >
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<td><h1><div id="pagehead">CallJS</div></h1></td>
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<h2>/SampleController.m</h2>
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<p><strong><a href="CallJS.zip">Download Sample</a></strong> (“CallJS.zip”, 88.4K)<BR>
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<pre class="sourcecodebox">/*
File: SampleController.m
Abstract: implementation for the main controller object
for the CallJS sample.
Version: 1.0
© Copyright 2007 Apple Computer, Inc. All rights reserved.
IMPORTANT: This Apple software is supplied to
you by Apple Computer, Inc. ("Apple") in
consideration of your agreement to the following
terms, and your use, installation, modification
or redistribution of this Apple software
constitutes acceptance of these terms. If you do
not agree with these terms, please do not use,
install, modify or redistribute this Apple
software.
In consideration of your agreement to abide by
the following terms, and subject to these terms,
Apple grants you a personal, non-exclusive
license, under Apple's copyrights in this
original Apple software (the "Apple Software"),
to use, reproduce, modify and redistribute the
Apple Software, with or without modifications, in
source and/or binary forms; provided that if you
redistribute the Apple Software in its entirety
and without modifications, you must retain this
notice and the following text and disclaimers in
all such redistributions of the Apple Software.
Neither the name, trademarks, service marks or
logos of Apple Computer, Inc. may be used to
endorse or promote products derived from the
Apple Software without specific prior written
permission from Apple. Except as expressly
stated in this notice, no other rights or
licenses, express or implied, are granted by
Apple herein, including but not limited to any
patent rights that may be infringed by your
derivative works or by other works in which the
Apple Software may be incorporated.
The Apple Software is provided by Apple on an "AS
IS" basis. APPLE MAKES NO WARRANTIES, EXPRESS OR
IMPLIED, INCLUDING WITHOUT LIMITATION THE IMPLIED
WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY
AND FITNESS FOR A PARTICULAR PURPOSE, REGARDING
THE APPLE SOFTWARE OR ITS USE AND OPERATION ALONE
OR IN COMBINATION WITH YOUR PRODUCTS.
IN NO EVENT SHALL APPLE BE LIABLE FOR ANY
SPECIAL, INDIRECT, INCIDENTAL OR CONSEQUENTIAL
DAMAGES (INCLUDING, BUT NOT LIMITED TO,
PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION) ARISING IN ANY WAY OUT OF THE USE,
REPRODUCTION, MODIFICATION AND/OR DISTRIBUTION OF
THE APPLE SOFTWARE, HOWEVER CAUSED AND WHETHER
UNDER THEORY OF CONTRACT, TORT (INCLUDING
NEGLIGENCE), STRICT LIABILITY OR OTHERWISE, EVEN
IF APPLE HAS BEEN ADVISED OF THE POSSIBILITY OF
SUCH DAMAGE.
*/
#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 {
if ((self = [super init]) != nil) {
sharedValue = [[NSString alloc] initWithString:@"okay"];
}
return self;
}
- (void) dealloc {
[sharedValue release];
[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
</pre>
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