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gecko-dev/lib/libdom/domnode.c
brendan%netscape.com 8db71997f5 - Use 8 space hard tabstops like god and IBM intended, but indent-tabs-mode:nil 
should eliminate hard tabs anyway (so 8 is just in case one gets thru -- LXR
  was not displaying this source well with 4).
- Don't nest jsapi.h outside the idempotent-include #ifndef in dom.h.
- Include xp.h to get this code working on Windows (to cope with some kind of
  compiled header problem).
- Fix bad JS_GetEmptyStringValue calls that were treated as returning JSString*
  rather than jsval, and fed into STRING_TO_JSVAL.
- Avoid tagging and untagging a jsval to test for a null JSString* return.
- Fiddle formatting in a couple of places.
- Avoid leaving cdata->data null after realloc failure.  Use of a local temp
  (data2) also improves generated code by eliminating memory ambiguity.
1998-09-11 19:46:23 +00:00

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/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
*
* The contents of this file are subject to the Netscape Public License
* Version 1.0 (the "NPL"); you may not use this file except in
* compliance with the NPL. You may obtain a copy of the NPL at
* http://www.mozilla.org/NPL/
*
* Software distributed under the NPL is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
* for the specific language governing rights and limitations under the
* NPL.
*
* The Initial Developer of this code under the NPL is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1998 Netscape Communications Corporation. All Rights
* Reserved.
*/
/*
* DOM Node, NodeList, NamedNodeMap implementation.
*/
#include "dom_priv.h"
#ifdef DEBUG_shaver
int DOM_node_indent = 0;
#endif
DOM_Node *
DOM_PopNode(DOM_Node *node)
{
return node->parent;
}
JSBool
DOM_PushNode(DOM_Node *node, DOM_Node *parent)
{
DOM_Node *iter;
node->parent = parent;
node->sibling = NULL;
node->prev_sibling = NULL;
node->child = NULL;
/* First child */
if (!parent->child) {
parent->child = node;
return JS_TRUE;
}
/*
* XXX optimize by using parent->mocha_object to cache last child, and
* XXX NULLing parent->mocha_object on PopNode?
*/
for (iter = parent->child; iter->sibling; iter = iter->sibling)
; /* empty */
XP_ASSERT(iter);
iter->sibling = node;
node->prev_sibling = iter;
return JS_TRUE;
}
JSObject *
DOM_ObjectForNode(JSContext *cx, DOM_Node *node)
{
if (!node)
return NULL;
if (node->mocha_object)
return node->mocha_object;
return DOM_NewNodeObject(cx, node);
}
JSBool
dom_node_getter(JSContext *cx, JSObject *obj, jsval id, jsval *vp)
{
intN slot;
DOM_Node *node;
JSString *str;
if (!JSVAL_IS_INT(id))
return JS_TRUE;
node = (DOM_Node *)JS_GetPrivate(cx, obj);
if (!node)
return JS_TRUE;
slot = JSVAL_TO_INT(id);
switch(slot) {
case DOM_NODE_NODENAME:
if (!node->name) {
*vp = JSVAL_NULL; /* XXX '#nameless' or some such? */
return JS_TRUE;
}
#ifdef DEBUG_shaver_0
str = JS_InternString(cx, node->name);
#else
str = JS_NewStringCopyZ(cx, node->name);
#endif
if (!str)
return JS_FALSE;
*vp = STRING_TO_JSVAL(str);
return JS_TRUE;
case DOM_NODE_NODETYPE:
*vp = INT_TO_JSVAL(node->type);
return JS_TRUE;
case DOM_NODE_FIRSTCHILD:
*vp = OBJECT_TO_JSVAL(DOM_ObjectForNodeDowncast(cx, node->child));
return JS_TRUE;
case DOM_NODE_NEXTSIBLING:
*vp = OBJECT_TO_JSVAL(DOM_ObjectForNodeDowncast(cx, node->sibling));
return JS_TRUE;
case DOM_NODE_PREVIOUSSIBLING:
*vp = OBJECT_TO_JSVAL(DOM_ObjectForNodeDowncast(cx,
node->prev_sibling));
return JS_TRUE;
case DOM_NODE_PARENTNODE:
*vp = OBJECT_TO_JSVAL(DOM_ObjectForNodeDowncast(cx, node->parent));
return JS_TRUE;
case DOM_NODE_HASCHILDNODES:
*vp = BOOLEAN_TO_JSVAL((JSBool)(node->child != NULL));
return JS_TRUE;
case DOM_NODE_ATTRIBUTES:
/* only elements have non-null attributes */
*vp = JSVAL_NULL;
return JS_TRUE;
default:
XP_ASSERT(0);
break;
}
return JS_TRUE;
}
JSBool
dom_node_setter(JSContext *cx, JSObject *obj, jsval id, jsval *vp)
{
return JS_TRUE;
}
void
dom_node_finalize(JSContext *cx, JSObject *obj)
{
DOM_Node *priv = (DOM_Node *)JS_GetPrivate(cx, obj);
if (!priv)
return;
priv->mocha_object = NULL;
DOM_DestroyTree(cx, priv);
}
static JSClass DOM_NodeClass = {
"Node", JSCLASS_HAS_PRIVATE,
JS_PropertyStub, JS_PropertyStub, dom_node_getter, dom_node_setter,
JS_EnumerateStub, JS_ResolveStub, JS_ConvertStub, dom_node_finalize
};
JSObject *
DOM_NewNodeObject(JSContext *cx, DOM_Node *node)
{
JSObject *obj;
obj = JS_ConstructObject(cx, &DOM_NodeClass, NULL, NULL);
if (!obj)
return NULL;
if (!JS_SetPrivate(cx, obj, node)) {
return NULL;
}
node->mocha_object = obj;
return obj;
}
void
DOM_DestroyNode(JSContext *cx, DOM_Node *node)
{
XP_ASSERT(!node->mocha_object);
if (node->ops && node->ops->destroyNode)
node->ops->destroyNode(cx, node);
if (node->name && node->type != NODE_TYPE_TEXT)
JS_free(cx, node->name);
JS_free(cx, node);
}
#define REMOVE_FROM_TREE(node) \
PR_BEGIN_MACRO \
if (node->prev_sibling) \
node->prev_sibling->sibling = node->sibling; \
if (node->sibling) \
node->sibling->prev_sibling = node->prev_sibling; \
node->sibling = node->prev_sibling = node->parent = NULL; \
PR_END_MACRO
#define FAIL_UNLESS_CHILD(node, refNode) \
PR_BEGIN_MACRO \
if (refNode->parent != node) { \
/* XXX walk the tree looking for it? */ \
DOM_SignalException(cx, DOM_NOT_FOUND_ERR); \
return JS_FALSE; \
} \
PR_END_MACRO
static JSBool
IsLegalChild(DOM_Node *node, DOM_Node *child)
{
switch(node->type) {
case NODE_TYPE_ATTRIBUTE:
if (child->type == NODE_TYPE_TEXT ||
child->type == NODE_TYPE_ENTITY_REF)
return JS_TRUE;
return JS_FALSE;
if (child->type == NODE_TYPE_ELEMENT ||
child->type == NODE_TYPE_COMMENT ||
child->type == NODE_TYPE_TEXT ||
child->type == NODE_TYPE_PI ||
child->type == NODE_TYPE_CDATA ||
child->type == NODE_TYPE_ENTITY_REF)
return JS_TRUE;
return JS_FALSE;
case NODE_TYPE_ELEMENT:
case NODE_TYPE_DOCFRAGMENT:
case NODE_TYPE_ENTITY_REF:
if (child->type == NODE_TYPE_ELEMENT ||
child->type == NODE_TYPE_PI ||
child->type == NODE_TYPE_COMMENT ||
child->type == NODE_TYPE_TEXT ||
child->type == NODE_TYPE_CDATA ||
child->type == NODE_TYPE_ENTITY_REF)
return JS_TRUE;
return JS_FALSE;
case NODE_TYPE_DOCUMENT:
if(child->type == NODE_TYPE_PI ||
child->type == NODE_TYPE_COMMENT ||
child->type == NODE_TYPE_DOCTYPE)
return JS_TRUE;
if (child->type == NODE_TYPE_ELEMENT)
/* XXX check to make sure it's the only one */
return JS_TRUE;
return JS_FALSE;
case NODE_TYPE_DOCTYPE:
if (child->type == NODE_TYPE_NOTATION ||
child->type == NODE_TYPE_ENTITY)
return JS_TRUE;
return JS_FALSE;
default: /* PI, COMMENT, TEXT, CDATA, ENTITY, NOTATION */
return JS_FALSE;
}
}
#define CHECK_LEGAL_CHILD(node, child) \
PR_BEGIN_MACRO \
if (!IsLegalChild(node, child)) { \
DOM_SignalException(cx, DOM_HIERARCHY_REQUEST_ERR); \
return JS_FALSE; \
} \
PR_END_MACRO
static JSBool
node_insertBefore(JSContext *cx, JSObject *obj, uintN argc, jsval *argv,
jsval *vp)
{
JSObject *newChild, *refChild;
DOM_Node *newNode, *refNode, *node;
if (!JS_ConvertArguments(cx, argc, argv, "oo", &newChild, &refChild))
return JS_FALSE;
node = (DOM_Node *)JS_GetPrivate(cx, obj);
if (!node)
return JS_TRUE;
newNode = (DOM_Node *)JS_GetPrivate(cx, newChild);
refNode = (DOM_Node *)JS_GetPrivate(cx, refChild);
*vp = argv[0]; /* newChild */
if (!newNode || !refNode) {
return JS_TRUE;
}
CHECK_LEGAL_CHILD(node, newNode);
FAIL_UNLESS_CHILD(node, refNode);
if (!node->ops->insertBefore(cx, node, newNode, refNode, JS_TRUE))
return JS_FALSE;
REMOVE_FROM_TREE(newNode);
newNode->parent = node;
newNode->sibling = refNode;
newNode->prev_sibling = refNode->prev_sibling;
refNode->prev_sibling = newNode;
return node->ops->insertBefore(cx, node, newNode, refNode, JS_TRUE);
}
static JSBool
node_replaceChild(JSContext *cx, JSObject *obj, uintN argc, jsval *argv,
jsval *vp)
{
JSObject *oldChild, *newChild;
DOM_Node *oldNode, *newNode, *node;
if (!JS_ConvertArguments(cx, argc, argv, "oo", &newChild, &oldChild))
return JS_FALSE;
node = (DOM_Node *)JS_GetPrivate(cx, obj);
if (!node)
return JS_TRUE;
newNode = (DOM_Node *)JS_GetPrivate(cx, newChild);
oldNode = (DOM_Node *)JS_GetPrivate(cx, oldChild);
*vp = argv[1]; /* oldChild */
if (newNode == oldNode ||
!newNode || !oldNode)
return JS_TRUE;
CHECK_LEGAL_CHILD(node, newNode);
FAIL_UNLESS_CHILD(node, oldNode);
if (!node->ops->replaceChild(cx, node, newNode, oldNode, JS_TRUE))
return JS_FALSE;
REMOVE_FROM_TREE(newNode);
newNode->parent = node;
oldNode->sibling->prev_sibling = newNode;
oldNode->prev_sibling->sibling = newNode;
oldNode->parent = oldNode->sibling = oldNode->prev_sibling = NULL;
return node->ops->replaceChild(cx, node, newNode, oldNode, JS_FALSE);
}
static JSBool
node_removeChild(JSContext *cx, JSObject *obj, uintN argc, jsval *argv,
jsval *vp)
{
JSObject *deadChild;
DOM_Node *deadNode, *node;
if (!JS_ConvertArguments(cx, argc, argv, "o", &deadChild))
return JS_FALSE;
*vp = argv[0]; /* deadChild */
node = (DOM_Node *)JS_GetPrivate(cx, obj);
deadNode = (DOM_Node *)JS_GetPrivate(cx, deadChild);
if (!deadNode || !node)
return JS_TRUE;
FAIL_UNLESS_CHILD(node, deadNode);
if (!node->ops->removeChild(cx, node, deadNode, JS_TRUE))
return JS_FALSE;
REMOVE_FROM_TREE(deadNode);
return node->ops->removeChild(cx, node, deadNode, JS_FALSE);
}
static JSBool
node_appendChild(JSContext *cx, JSObject *obj, uintN argc, jsval *argv,
jsval *vp)
{
JSObject *newChild;
DOM_Node *newNode, *node, *iter;
if (!JS_ConvertArguments(cx, argc, argv, "o", &newChild))
return JS_FALSE;
*vp = argv[0]; /* newChild */
node = (DOM_Node *)JS_GetPrivate(cx, obj);
newNode = (DOM_Node *)JS_GetPrivate(cx, obj);
if (!node || !newNode)
return JS_TRUE;
CHECK_LEGAL_CHILD(node, newNode);
if (node->ops->appendChild(cx, node, newNode, JS_TRUE))
REMOVE_FROM_TREE(newNode);
newNode->parent = node;
iter = node->child;
if (iter) {
while (iter->sibling)
iter = iter->sibling;
iter->sibling = newNode;
newNode->prev_sibling = iter;
} else {
node->child = newNode;
}
return node->ops->appendChild(cx, node, newNode, JS_FALSE);
}
static JSBool
node_cloneNode(JSContext *cx, JSObject *obj, uintN argc, jsval *argv,
jsval *vp)
{
JSBool deep;
if (!JS_ConvertArguments(cx, argc, argv, "b", &deep))
return JS_FALSE;
DOM_SignalException(cx, DOM_NOT_SUPPORTED_ERR);
/* clone */
return JS_TRUE;
}
static JSBool
node_equals(JSContext *cx, JSObject *obj, uintN argc, jsval *argv, jsval *vp)
{
JSObject *node;
DOM_Node *node1, *node2;
if (!JS_ConvertArguments(cx, argc, argv, "o", &node))
return JS_FALSE;
node1 = (DOM_Node *)JS_GetPrivate(cx, obj);
node2 = (DOM_Node *)JS_GetPrivate(cx, node);
*vp = (JSBool)(node1 == node2);
return JS_TRUE;
}
static JSFunctionSpec node_methods[] = {
{"insertBefore", node_insertBefore, 2},
{"replaceChild", node_replaceChild, 2},
{"removeChild", node_removeChild, 1},
{"appendChild", node_appendChild, 1},
{"cloneNode", node_cloneNode, 1},
{"equals", node_equals, 2},
{0}
};
JSPropertySpec dom_node_props[] = {
{"nodeName", DOM_NODE_NODENAME},
{"nodeValue", DOM_NODE_NODEVALUE},
{"nodeType", DOM_NODE_NODETYPE},
{"parentNode", DOM_NODE_PARENTNODE},
{"childNodes", DOM_NODE_CHILDNODES},
{"firstChild", DOM_NODE_FIRSTCHILD},
{"lastChild", DOM_NODE_LASTCHILD},
{"previousSibling", DOM_NODE_PREVIOUSSIBLING},
{"nextSibling", DOM_NODE_NEXTSIBLING},
{"attributes", DOM_NODE_ATTRIBUTES},
{"hasChildNodes", DOM_NODE_HASCHILDNODES},
{0}
};
static JSConstDoubleSpec node_static_props[] = {
{NODE_TYPE_ELEMENT, "ELEMENT"},
{NODE_TYPE_ATTRIBUTE, "ATTRIBUTE"},
{NODE_TYPE_PI, "PROCESSING_INSTRUCTION"},
{NODE_TYPE_CDATA, "CDATA_SECTION"},
{NODE_TYPE_TEXT, "TEXT"},
{NODE_TYPE_ENTITY_REF, "ENTITY_REFERENCE"},
{NODE_TYPE_ENTITY, "ENTITY"},
{NODE_TYPE_COMMENT, "COMMENT"},
{NODE_TYPE_DOCUMENT, "DOCUMENT"},
{NODE_TYPE_DOCTYPE, "DOCUMENT_TYPE"},
{NODE_TYPE_DOCFRAGMENT, "DOCUMENT_FRAGMENT"},
{NODE_TYPE_NOTATION, "NOTATION"},
{0}
};
static JSBool
Node(JSContext *cx, JSObject *obj, uintN argc, jsval *argv, jsval *vp)
{
return JS_TRUE;
}
JSObject *
dom_NodeInit(JSContext *cx, JSObject *scope)
{
JSObject *proto, *ctor;
proto = JS_InitClass(cx, scope, NULL, &DOM_NodeClass,
Node, 0,
dom_node_props, node_methods,
NULL, NULL);
if (!proto || !(ctor = JS_GetConstructor(cx, proto)))
return NULL;
if (!JS_DefineConstDoubles(cx, ctor, node_static_props))
return NULL;
return proto;
}
/*
* NodeList
*
* Basically an Array with magic methods.
*/
#if 0
static JSClass DOM_NodeListClass = {
"NodeList", 0,
JS_PropertyStub, JS_PropertyStub, JS_PropertyStub, JS_PropertyStub,
JS_EnumerateStub, JS_ResolveStub, JS_ConvertStub, JS_FinalizeStub
};
static JSBool
nodelist_item(JSContext *cx, JSObject *obj, uintN argc, jsval *argv,
jsval *rval)
{
uint32 index;
if (!JS_ConvertArguments(cx, argc, argv, "j", &index))
return JS_TRUE;
/* JS_GetElement */
return JS_TRUE;
}
static JSFunctionSpec nodelist_methods[] = {
{"item", nodelist_item, 1},
{0},
};
static JSBool
nodelist_size_get(JSContext *cx, JSObject *obj, jsval id, jsval *vp)
{
return JS_TRUE;
}
static JSPropertySpec nodelist_props[] = {
{"size", -1, 0, nodelist_size_get},
{0}
};
/*
* NamedNodeMap
*
* Basically an Object with magic resolve and helper methods.
*/
static JSBool
nnm_resolve(JSContext *cx, JSObject *obj, jsval id, jsval *vp)
{
return JS_TRUE;
}
static JSClass DOM_NamedNodeMapClass = {
"NamedNodeMap", 0,
JS_PropertyStub, JS_PropertyStub, JS_PropertyStub, JS_PropertyStub,
JS_EnumerateStub, JS_ResolveStub, JS_ConvertStub, JS_FinalizeStub
};
static JSBool
nnm_getNamedItem(JSContext *cx, JSObject *obj, uintN argc, jsval *argv,
jsval *rval)
{
/* JS_GetProperty */
return JS_TRUE;
}
static JSBool
nnm_setNamedItem(JSContext *cx, JSObject *obj, uintN argc, jsval *argv,
jsval *rval)
{
return JS_TRUE;
/* JS_SetProperty */
}
static JSBool
nnm_removeNamedItem(JSContext *cx, JSObject *obj, uintN argc, jsval *argv,
jsval *rval)
{
/* JS_DeleteProperty */
return JS_TRUE;
}
static JSBool
nnm_item(JSContext *cx, JSObject *obj, uintN argc, jsval *argv,
jsval *rval)
{
/* return given slot -- OBJ_GET_SLOT? */
return JS_TRUE;
}
static JSFunctionSpec nnm_methods[] = {
{"getNamedItem", nnm_getNamedItem, 1},
{"setNamedItem", nnm_setNamedItem, 1},
{"removeNamedItem", nnm_removeNamedItem,1},
{"item", nnm_item, 1},
{0}
};
static JSBool
nnm_get_size(JSContext *cx, JSObject *obj, jsval id, jsval *vp)
{
/* return __count__ */
return JS_FALSE;
}
enum {
NNM_SIZE = -1
};
static JSPropertySpec nnm_props[] = {
{"size", NNM_SIZE, 0, nnm_get_size},
{0}
};
#endif /* 0 */
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