API/JSNodeList.c

   1 // -*- mode: c++; c-basic-offset: 4 -*-
   2 /*
   3  * Copyright (C) 2006 Apple Computer, Inc.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  *
  14  * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
  15  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  17  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
  18  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  19  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  20  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  21  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
  22  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  23  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  24  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  25  */
  26
  27 #include "JSNode.h"
  28 #include "JSNodeList.h"
  29 #include "JSObjectRef.h"
  30 #include "JSValueRef.h"
  31 #include "UnusedParam.h"
  32 #include <wtf/Assertions.h>
  33
  34 static JSValueRef JSNodeList_item(JSContextRef context, JSObjectRef object, JSObjectRef thisObject, size_t argumentCount, const JSValueRef arguments[], JSValueRef* exception)
  35 {
  36     UNUSED_PARAM(object);
  37
  38     if (argumentCount > 0) {
  39         NodeList* nodeList = JSObjectGetPrivate(thisObject);
  40         ASSERT(nodeList);
  41         Node* node = NodeList_item(nodeList, (unsigned)JSValueToNumber(context, arguments[0], exception));
  42         if (node)
  43             return JSNode_new(context, node);
  44     }
  45
  46     return JSValueMakeUndefined(context);
  47 }
  48
  49 static JSStaticFunction JSNodeList_staticFunctions[] = {
  50     { "item", JSNodeList_item, kJSPropertyAttributeDontDelete },
  51     { 0, 0, 0 }
  52 };
  53
  54 static JSValueRef JSNodeList_length(JSContextRef context, JSObjectRef thisObject, JSStringRef propertyName, JSValueRef* exception)
  55 {
  56     UNUSED_PARAM(propertyName);
  57     UNUSED_PARAM(exception);
  58
  59     NodeList* nodeList = JSObjectGetPrivate(thisObject);
  60     ASSERT(nodeList);
  61     return JSValueMakeNumber(context, NodeList_length(nodeList));
  62 }
  63
  64 static JSStaticValue JSNodeList_staticValues[] = {
  65     { "length", JSNodeList_length, NULL, kJSPropertyAttributeReadOnly | kJSPropertyAttributeDontDelete },
  66     { 0, 0, 0, 0 }
  67 };
  68
  69 static JSValueRef JSNodeList_getProperty(JSContextRef context, JSObjectRef thisObject, JSStringRef propertyName, JSValueRef* exception)
  70 {
  71     NodeList* nodeList = JSObjectGetPrivate(thisObject);
  72     ASSERT(nodeList);
  73     double index = JSValueToNumber(context, JSValueMakeString(context, propertyName), exception);
  74     unsigned uindex = (unsigned)index;
  75     if (uindex == index) { // false for NaN
  76         Node* node = NodeList_item(nodeList, uindex);
  77         if (node)
  78             return JSNode_new(context, node);
  79     }
  80
  81     return NULL;
  82 }
  83
  84 static void JSNodeList_initialize(JSContextRef context, JSObjectRef thisObject)
  85 {
  86     UNUSED_PARAM(context);
  87
  88     NodeList* nodeList = JSObjectGetPrivate(thisObject);
  89     ASSERT(nodeList);
  90
  91     NodeList_ref(nodeList);
  92 }
  93
  94 static void JSNodeList_finalize(JSObjectRef thisObject)
  95 {
  96     NodeList* nodeList = JSObjectGetPrivate(thisObject);
  97     ASSERT(nodeList);
  98
  99     NodeList_deref(nodeList);
 100 }
 101
 102 static JSClassRef JSNodeList_class(JSContextRef context)
 103 {
 104     UNUSED_PARAM(context);
 105
 106     static JSClassRef jsClass;
 107     if (!jsClass) {
 108         JSClassDefinition definition = kJSClassDefinitionEmpty;
 109         definition.staticValues = JSNodeList_staticValues;
 110         definition.staticFunctions = JSNodeList_staticFunctions;
 111         definition.getProperty = JSNodeList_getProperty;
 112         definition.initialize = JSNodeList_initialize;
 113         definition.finalize = JSNodeList_finalize;
 114
 115         jsClass = JSClassCreate(&definition);
 116     }
 117
 118     return jsClass;
 119 }
 120
 121 JSObjectRef JSNodeList_new(JSContextRef context, NodeList* nodeList)
 122 {
 123     return JSObjectMake(context, JSNodeList_class(context), nodeList);
 124 }