API/JSNode.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 "JSStringRef.h"
  31 #include "JSValueRef.h"
  32 #include "Node.h"
  33 #include "NodeList.h"
  34 #include "UnusedParam.h"
  35 #include <wtf/Assertions.h>
  36
  37 static JSValueRef JSNode_appendChild(JSContextRef context, JSObjectRef function, JSObjectRef thisObject, size_t argumentCount, const JSValueRef arguments[], JSValueRef* exception)
  38 {
  39     UNUSED_PARAM(function);
  40
  41     // Example of throwing a type error for invalid values
  42     if (!JSValueIsObjectOfClass(context, thisObject, JSNode_class(context))) {
  43         JSStringRef message = JSStringCreateWithUTF8CString("TypeError: appendChild can only be called on nodes");
  44         *exception = JSValueMakeString(context, message);
  45         JSStringRelease(message);
  46     } else if (argumentCount < 1 || !JSValueIsObjectOfClass(context, arguments[0], JSNode_class(context))) {
  47         JSStringRef message = JSStringCreateWithUTF8CString("TypeError: first argument to appendChild must be a node");
  48         *exception = JSValueMakeString(context, message);
  49         JSStringRelease(message);
  50     } else {
  51         Node* node = JSObjectGetPrivate(thisObject);
  52         Node* child = JSObjectGetPrivate(JSValueToObject(context, arguments[0], NULL));
  53
  54         Node_appendChild(node, child);
  55     }
  56
  57     return JSValueMakeUndefined(context);
  58 }
  59
  60 static JSValueRef JSNode_removeChild(JSContextRef context, JSObjectRef function, JSObjectRef thisObject, size_t argumentCount, const JSValueRef arguments[], JSValueRef* exception)
  61 {
  62     UNUSED_PARAM(function);
  63
  64     // Example of ignoring invalid values
  65     if (argumentCount > 0) {
  66         if (JSValueIsObjectOfClass(context, thisObject, JSNode_class(context))) {
  67             if (JSValueIsObjectOfClass(context, arguments[0], JSNode_class(context))) {
  68                 Node* node = JSObjectGetPrivate(thisObject);
  69                 Node* child = JSObjectGetPrivate(JSValueToObject(context, arguments[0], exception));
  70
  71                 Node_removeChild(node, child);
  72             }
  73         }
  74     }
  75
  76     return JSValueMakeUndefined(context);
  77 }
  78
  79 static JSValueRef JSNode_replaceChild(JSContextRef context, JSObjectRef function, JSObjectRef thisObject, size_t argumentCount, const JSValueRef arguments[], JSValueRef* exception)
  80 {
  81     UNUSED_PARAM(function);
  82
  83     if (argumentCount > 1) {
  84         if (JSValueIsObjectOfClass(context, thisObject, JSNode_class(context))) {
  85             if (JSValueIsObjectOfClass(context, arguments[0], JSNode_class(context))) {
  86                 if (JSValueIsObjectOfClass(context, arguments[1], JSNode_class(context))) {
  87                     Node* node = JSObjectGetPrivate(thisObject);
  88                     Node* newChild = JSObjectGetPrivate(JSValueToObject(context, arguments[0], exception));
  89                     Node* oldChild = JSObjectGetPrivate(JSValueToObject(context, arguments[1], exception));
  90
  91                     Node_replaceChild(node, newChild, oldChild);
  92                 }
  93             }
  94         }
  95     }
  96
  97     return JSValueMakeUndefined(context);
  98 }
  99
 100 static JSStaticFunction JSNode_staticFunctions[] = {
 101     { "appendChild", JSNode_appendChild, kJSPropertyAttributeDontDelete },
 102     { "removeChild", JSNode_removeChild, kJSPropertyAttributeDontDelete },
 103     { "replaceChild", JSNode_replaceChild, kJSPropertyAttributeDontDelete },
 104     { 0, 0, 0 }
 105 };
 106
 107 static JSValueRef JSNode_getNodeType(JSContextRef context, JSObjectRef object, JSStringRef propertyName, JSValueRef* exception)
 108 {
 109     UNUSED_PARAM(propertyName);
 110     UNUSED_PARAM(exception);
 111
 112     Node* node = JSObjectGetPrivate(object);
 113     if (node) {
 114         JSStringRef nodeType = JSStringCreateWithUTF8CString(node->nodeType);
 115         JSValueRef value = JSValueMakeString(context, nodeType);
 116         JSStringRelease(nodeType);
 117         return value;
 118     }
 119
 120     return NULL;
 121 }
 122
 123 static JSValueRef JSNode_getChildNodes(JSContextRef context, JSObjectRef thisObject, JSStringRef propertyName, JSValueRef* exception)
 124 {
 125     UNUSED_PARAM(propertyName);
 126     UNUSED_PARAM(exception);
 127
 128     Node* node = JSObjectGetPrivate(thisObject);
 129     ASSERT(node);
 130     return JSNodeList_new(context, NodeList_new(node));
 131 }
 132
 133 static JSValueRef JSNode_getFirstChild(JSContextRef context, JSObjectRef object, JSStringRef propertyName, JSValueRef* exception)
 134 {
 135     UNUSED_PARAM(object);
 136     UNUSED_PARAM(propertyName);
 137     UNUSED_PARAM(exception);
 138
 139     return JSValueMakeUndefined(context);
 140 }
 141
 142 static JSStaticValue JSNode_staticValues[] = {
 143     { "nodeType", JSNode_getNodeType, NULL, kJSPropertyAttributeDontDelete | kJSPropertyAttributeReadOnly },
 144     { "childNodes", JSNode_getChildNodes, NULL, kJSPropertyAttributeDontDelete | kJSPropertyAttributeReadOnly },
 145     { "firstChild", JSNode_getFirstChild, NULL, kJSPropertyAttributeDontDelete | kJSPropertyAttributeReadOnly },
 146     { 0, 0, 0, 0 }
 147 };
 148
 149 static void JSNode_initialize(JSContextRef context, JSObjectRef object)
 150 {
 151     UNUSED_PARAM(context);
 152
 153     Node* node = JSObjectGetPrivate(object);
 154     ASSERT(node);
 155
 156     Node_ref(node);
 157 }
 158
 159 static void JSNode_finalize(JSObjectRef object)
 160 {
 161     Node* node = JSObjectGetPrivate(object);
 162     ASSERT(node);
 163
 164     Node_deref(node);
 165 }
 166
 167 JSClassRef JSNode_class(JSContextRef context)
 168 {
 169     UNUSED_PARAM(context);
 170
 171     static JSClassRef jsClass;
 172     if (!jsClass) {
 173         JSClassDefinition definition = kJSClassDefinitionEmpty;
 174         definition.staticValues = JSNode_staticValues;
 175         definition.staticFunctions = JSNode_staticFunctions;
 176         definition.initialize = JSNode_initialize;
 177         definition.finalize = JSNode_finalize;
 178
 179         jsClass = JSClassCreate(&definition);
 180     }
 181     return jsClass;
 182 }
 183
 184 JSObjectRef JSNode_new(JSContextRef context, Node* node)
 185 {
 186     return JSObjectMake(context, JSNode_class(context), node);
 187 }
 188
 189 JSObjectRef JSNode_construct(JSContextRef context, JSObjectRef object, size_t argumentCount, const JSValueRef arguments[], JSValueRef* exception)
 190 {
 191     UNUSED_PARAM(object);
 192     UNUSED_PARAM(argumentCount);
 193     UNUSED_PARAM(arguments);
 194     UNUSED_PARAM(exception);
 195
 196     return JSNode_new(context, Node_new());
 197 }