Line data    Source code

       1           0 : /*
       2             : 
       3             : OOJSPopulatorDefinition.m
       4             : 
       5             : 
       6             : Oolite
       7             : Copyright (C) 2004-2013 Giles C Williams and contributors
       8             : 
       9             : This program is free software; you can redistribute it and/or
      10             : modify it under the terms of the GNU General Public License
      11             : as published by the Free Software Foundation; either version 2
      12             : of the License, or (at your option) any later version.
      13             : 
      14             : This program is distributed in the hope that it will be useful,
      15             : but WITHOUT ANY WARRANTY; without even the implied warranty of
      16             : MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
      17             : GNU General Public License for more details.
      18             : 
      19             : You should have received a copy of the GNU General Public License
      20             : along with this program; if not, write to the Free Software
      21             : Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
      22             : MA 02110-1301, USA.
      23             : 
      24             : */
      25             : 
      26             : #import "OOJSPopulatorDefinition.h"
      27             : #import "OOJavaScriptEngine.h"
      28             : #import "OOMaths.h"
      29             : #import "OOJSVector.h"
      30             : 
      31             : @implementation OOJSPopulatorDefinition
      32             : 
      33           0 : - (id) init {
      34             :         self = [super init];
      35             :         _callback = JSVAL_VOID;
      36             :         _callbackThis = NULL;
      37             : 
      38             :         _owningScript = [[OOJSScript currentlyRunningScript] weakRetain];
      39             : 
      40             :         [[NSNotificationCenter defaultCenter] addObserver:self
      41             :                                                                                                  selector:@selector(deleteJSPointers)
      42             :                                                                                                  name:kOOJavaScriptEngineWillResetNotification
      43             :                                                                                            object:[OOJavaScriptEngine sharedEngine]];
      44             : 
      45             :         return self;
      46             : }
      47             : 
      48           0 : - (void) deleteJSPointers
      49             : {
      50             : 
      51             :         JSContext                               *context = OOJSAcquireContext();
      52             :         _callback = JSVAL_VOID;
      53             :         _callbackThis = NULL;
      54             :         JS_RemoveValueRoot(context, &_callback);
      55             :         JS_RemoveObjectRoot(context, &_callbackThis);
      56             : 
      57             :         OOJSRelinquishContext(context);
      58             : 
      59             :         [[NSNotificationCenter defaultCenter] removeObserver:self
      60             :                                                                                                         name:kOOJavaScriptEngineWillResetNotification
      61             :                                                                                                   object:[OOJavaScriptEngine sharedEngine]];
      62             : 
      63             : }
      64             : 
      65           0 : - (void) dealloc 
      66             : {
      67             :         [_owningScript release];
      68             : 
      69             :         [self deleteJSPointers];
      70             : 
      71             :         [super dealloc];
      72             : }
      73             : 
      74             : - (jsval)callback
      75             : {
      76             :         return _callback;
      77             : }
      78             : 
      79             : 
      80             : - (void)setCallback:(jsval)callback
      81             : {
      82             :         JSContext                               *context = OOJSAcquireContext();
      83             :         JS_RemoveValueRoot(context, &_callback);
      84             :         _callback = callback;
      85             :         OOJSAddGCValueRoot(context, &_callback, "OOJSPopulatorDefinition callback function");
      86             :         OOJSRelinquishContext(context);
      87             : }
      88             : 
      89             : 
      90             : - (JSObject *)callbackThis
      91             : {
      92             :         return _callbackThis;
      93             : }
      94             : 
      95             : 
      96             : - (void)setCallbackThis:(JSObject *)callbackThis
      97             : {
      98             :         JSContext                               *context = OOJSAcquireContext();
      99             :         JS_RemoveObjectRoot(context, &_callbackThis);
     100             :         _callbackThis = callbackThis;
     101             :         OOJSAddGCObjectRoot(context, &_callbackThis, "OOJSPopulatorDefinition callback this");
     102             :         OOJSRelinquishContext(context);
     103             : }
     104             : 
     105             : 
     106             : - (void)runCallback:(HPVector)location
     107             : {
     108             :         OOJavaScriptEngine *engine = [OOJavaScriptEngine sharedEngine];
     109             :         JSContext                       *context = OOJSAcquireContext();                
     110             :         jsval                                   loc, rval = JSVAL_VOID;
     111             : 
     112             :         VectorToJSValue(context, HPVectorToVector(location), &loc);
     113             : 
     114             :         OOJSScript *owner = [_owningScript retain]; // local copy needed
     115             :         [OOJSScript pushScript:owner];
     116             : 
     117             :         [engine callJSFunction:_callback
     118             :                                  forObject:_callbackThis
     119             :                                           argc:1
     120             :                                           argv:&loc
     121             :                                         result:&rval];
     122             :         
     123             :         [OOJSScript popScript:owner];
     124             :         [owner release];
     125             : 
     126             :         OOJSRelinquishContext(context);
     127             : }
     128             : 
     129             : @end