New method to see if a function exists or not.

ccgus · Aug 6, 2012 · f1e7c69 · f1e7c69
1 parent ca70a5f
commit f1e7c69
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Showing 2 changed files with 13 additions and 0 deletions.
diff --git a/src/JSTalk.h b/src/JSTalk.h
@@ -30,6 +30,7 @@
 
 - (JSCocoaController*)jsController;
 - (id)callFunctionNamed:(NSString*)name withArguments:(NSArray*)args;
+- (BOOL)hasFunctionNamed:(NSString*)name;
 
 + (void)listen;
 + (void)resetPlugins;

diff --git a/src/JSTalk.m b/src/JSTalk.m
@@ -304,6 +304,18 @@ - (id)callFunctionNamed:(NSString*)name withArguments:(NSArray*)args {
     return returnObject;
 }
 
+- (BOOL)hasFunctionNamed:(NSString*)name {
+
+    JSCocoaController *jsController = [self jsController];
+    JSValueRef exception = nil;
+    JSStringRef jsFunctionName = JSStringCreateWithUTF8CString([name UTF8String]);
+    JSValueRef jsFunctionValue = JSObjectGetProperty([jsController ctx], JSContextGetGlobalObject([jsController ctx]), jsFunctionName, &exception);
+    JSStringRelease(jsFunctionName);
+
+
+    return jsFunctionValue && (JSValueGetType([jsController ctx], jsFunctionValue) == kJSTypeObject);
+}
+
 - (void)include:(NSString*)fileName {
 
     if (![fileName hasPrefix:@"/"] && [_env objectForKey:@"scriptURL"]) {