File indexing completed on 2023-09-24 04:06:14

 /*
  *  This file is part of the KDE libraries
  *  Copyright (C) 2001 Peter Kelly (pmk@post.com)
  *
  *  This library is free software; you can redistribute it and/or
  *  modify it under the terms of the GNU Library General Public
  *  License as published by the Free Software Foundation; either
  *  version 2 of the License, or (at your option) any later version.
  *
  *  This library is distributed in the hope that it will be useful,
  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  *  Library General Public License for more details.
  *
  *  You should have received a copy of the GNU Library General Public
  *  License along with this library; if not, write to the Free Software
  *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
  */
 
 #include "kjs_traversal.h"
 #include "kjs_traversal.lut.h"
 #include "kjs_proxy.h"
 #include <dom/dom_node.h>
 #include <xml/dom_nodeimpl.h>
 #include <xml/dom_docimpl.h>
 #include <khtmlview.h>
 #include <khtml_part.h>
 #include "khtml_debug.h"
 
 using namespace KJS;
 
 namespace KJS
 {
 
 class TraversalExceptionForwarder
 {
 public:
     explicit TraversalExceptionForwarder(ExecState *exec) : m_exec(exec), m_code(nullptr) { }
     ~TraversalExceptionForwarder()
     {
         if (m_code) {
             m_exec->setException(static_cast<JSValue *>(m_code));
         }
     }
     operator void *&()
     {
         return m_code;
     }
 private:
     ExecState *m_exec;
     void *m_code;
 };
 
 }
 // -------------------------------------------------------------------------
 
 const ClassInfo DOMNodeIterator::info = { "NodeIterator", nullptr, &DOMNodeIteratorTable, nullptr };
 /*
 @begin DOMNodeIteratorTable 5
   root              DOMNodeIterator::Root           DontDelete|ReadOnly
   whatToShow            DOMNodeIterator::WhatToShow     DontDelete|ReadOnly
   filter            DOMNodeIterator::Filter         DontDelete|ReadOnly
   expandEntityReferences    DOMNodeIterator::ExpandEntityReferences DontDelete|ReadOnly
 @end
 @begin DOMNodeIteratorProtoTable 3
   nextNode  DOMNodeIterator::NextNode   DontDelete|Function 0
   previousNode  DOMNodeIterator::PreviousNode   DontDelete|Function 0
   detach    DOMNodeIterator::Detach     DontDelete|Function 0
 @end
 */
 KJS_DEFINE_PROTOTYPE(DOMNodeIteratorProto)
 KJS_IMPLEMENT_PROTOFUNC(DOMNodeIteratorProtoFunc)
 KJS_IMPLEMENT_PROTOTYPE("DOMNodeIterator", DOMNodeIteratorProto, DOMNodeIteratorProtoFunc, ObjectPrototype)
 
 DOMNodeIterator::DOMNodeIterator(ExecState *exec, DOM::NodeIteratorImpl *ni)
     : DOMObject(DOMNodeIteratorProto::self(exec)), m_impl(ni) {}
 
 DOMNodeIterator::~DOMNodeIterator()
 {
     ScriptInterpreter::forgetDOMObject(m_impl.get());
 }
 
 bool DOMNodeIterator::getOwnPropertySlot(ExecState *exec, const Identifier &propertyName, PropertySlot &slot)
 {
     return getStaticValueSlot<DOMNodeIterator, DOMObject>(exec, &DOMNodeIteratorTable, this, propertyName, slot);
 }
 
 JSValue *DOMNodeIterator::getValueProperty(ExecState *exec, int token) const
 {
     DOM::NodeIteratorImpl &ni = *impl();
     switch (token) {
     case Root:
         return getDOMNode(exec, ni.root());
     case WhatToShow:
         return jsNumber(ni.whatToShow());
     case Filter:
         return getDOMNodeFilter(exec, ni.filter());
     case ExpandEntityReferences:
         return jsBoolean(ni.expandEntityReferences());
     default:
         // qCDebug(KHTML_LOG) << "WARNING: Unhandled token in DOMNodeIterator::getValueProperty : " << token;
         return nullptr;
     }
 }
 
 JSValue *DOMNodeIteratorProtoFunc::callAsFunction(ExecState *exec, JSObject *thisObj, const List &)
 {
     KJS_CHECK_THIS(KJS::DOMNodeIterator, thisObj);
     DOMExceptionTranslator      exception(exec);
     TraversalExceptionForwarder filterException(exec);
     DOM::NodeIteratorImpl &nodeIterator = *static_cast<DOMNodeIterator *>(thisObj)->impl();
     switch (id) {
     case DOMNodeIterator::PreviousNode: {
         SharedPtr<DOM::NodeImpl> node = nodeIterator.previousNode(exception, filterException);
         if (!filterException) {
             return getDOMNode(exec, node.get());
         }
         break;
     }
     case DOMNodeIterator::NextNode: {
         SharedPtr<DOM::NodeImpl> node = nodeIterator.nextNode(exception, filterException);
         if (!filterException) {
             return getDOMNode(exec, node.get());
         }
         break;
     }
     case DOMNodeIterator::Detach:
         nodeIterator.detach(exception);
         return jsUndefined();
     }
     return jsUndefined();
 }
 
 JSValue *KJS::getDOMNodeIterator(ExecState *exec, DOM::NodeIteratorImpl *ni)
 {
     return cacheDOMObject<DOM::NodeIteratorImpl, DOMNodeIterator>(exec, ni);
 }
 
 // -------------------------------------------------------------------------
 
 const ClassInfo NodeFilterConstructor::info = { "NodeFilterConstructor", nullptr, &NodeFilterConstructorTable, nullptr };
 /*
 @begin NodeFilterConstructorTable 17
   FILTER_ACCEPT     DOM::NodeFilter::FILTER_ACCEPT  DontDelete|ReadOnly
   FILTER_REJECT     DOM::NodeFilter::FILTER_REJECT  DontDelete|ReadOnly
   FILTER_SKIP       DOM::NodeFilter::FILTER_SKIP    DontDelete|ReadOnly
   SHOW_ALL      DOM::NodeFilter::SHOW_ALL   DontDelete|ReadOnly
   SHOW_ELEMENT      DOM::NodeFilter::SHOW_ELEMENT   DontDelete|ReadOnly
   SHOW_ATTRIBUTE    DOM::NodeFilter::SHOW_ATTRIBUTE DontDelete|ReadOnly
   SHOW_TEXT     DOM::NodeFilter::SHOW_TEXT  DontDelete|ReadOnly
   SHOW_CDATA_SECTION    DOM::NodeFilter::SHOW_CDATA_SECTION DontDelete|ReadOnly
   SHOW_ENTITY_REFERENCE DOM::NodeFilter::SHOW_ENTITY_REFERENCE  DontDelete|ReadOnly
   SHOW_ENTITY       DOM::NodeFilter::SHOW_ENTITY    DontDelete|ReadOnly
   SHOW_PROCESSING_INSTRUCTION   DOM::NodeFilter::SHOW_PROCESSING_INSTRUCTION    DontDelete|ReadOnly
   SHOW_COMMENT      DOM::NodeFilter::SHOW_COMMENT   DontDelete|ReadOnly
   SHOW_DOCUMENT     DOM::NodeFilter::SHOW_DOCUMENT  DontDelete|ReadOnly
   SHOW_DOCUMENT_TYPE    DOM::NodeFilter::SHOW_DOCUMENT_TYPE DontDelete|ReadOnly
   SHOW_DOCUMENT_FRAGMENT    DOM::NodeFilter::SHOW_DOCUMENT_FRAGMENT DontDelete|ReadOnly
   SHOW_NOTATION     DOM::NodeFilter::SHOW_NOTATION  DontDelete|ReadOnly
 @end
 */
 
 NodeFilterConstructor::NodeFilterConstructor(ExecState *exec)
     : DOMObject(exec->lexicalInterpreter()->builtinObjectPrototype())
 {
 }
 
 bool NodeFilterConstructor::getOwnPropertySlot(ExecState *exec, const Identifier &propertyName, PropertySlot &slot)
 {
     return getStaticValueSlot<NodeFilterConstructor, DOMObject>(exec, &NodeFilterConstructorTable, this, propertyName, slot);
 }
 
 JSValue *NodeFilterConstructor::getValueProperty(ExecState *, int token) const
 {
     // We use the token as the value to return directly
     return jsNumber(token);
 }
 
 JSValue *KJS::getNodeFilterConstructor(ExecState *exec)
 {
     return cacheGlobalObject<NodeFilterConstructor>(exec, "[[nodeFilter.constructor]]");
 }
 
 // -------------------------------------------------------------------------
 
 const ClassInfo DOMTreeWalker::info = { "TreeWalker", nullptr, &DOMTreeWalkerTable, nullptr };
 /*
 @begin DOMTreeWalkerTable 5
   root          DOMTreeWalker::Root     DontDelete|ReadOnly
   whatToShow        DOMTreeWalker::WhatToShow   DontDelete|ReadOnly
   filter        DOMTreeWalker::Filter       DontDelete|ReadOnly
   expandEntityReferences DOMTreeWalker::ExpandEntityReferences  DontDelete|ReadOnly
   currentNode       DOMTreeWalker::CurrentNode  DontDelete
 @end
 @begin DOMTreeWalkerProtoTable 7
   parentNode    DOMTreeWalker::ParentNode   DontDelete|Function 0
   firstChild    DOMTreeWalker::FirstChild   DontDelete|Function 0
   lastChild DOMTreeWalker::LastChild    DontDelete|Function 0
   previousSibling DOMTreeWalker::PreviousSibling    DontDelete|Function 0
   nextSibling   DOMTreeWalker::NextSibling  DontDelete|Function 0
   previousNode  DOMTreeWalker::PreviousNode DontDelete|Function 0
   nextNode  DOMTreeWalker::NextNode     DontDelete|Function 0
 @end
 */
 KJS_DEFINE_PROTOTYPE(DOMTreeWalkerProto)
 KJS_IMPLEMENT_PROTOFUNC(DOMTreeWalkerProtoFunc)
 KJS_IMPLEMENT_PROTOTYPE("DOMTreeWalker", DOMTreeWalkerProto, DOMTreeWalkerProtoFunc, ObjectPrototype)
 
 DOMTreeWalker::DOMTreeWalker(ExecState *exec, DOM::TreeWalkerImpl *tw)
     : m_impl(tw)
 {
     setPrototype(DOMTreeWalkerProto::self(exec));
 }
 
 DOMTreeWalker::~DOMTreeWalker()
 {
     ScriptInterpreter::forgetDOMObject(m_impl.get());
 }
 
 void DOMTreeWalker::mark()
 {
     JSObject::mark();
     JSNodeFilter *filt = JSNodeFilter::fromDOMFilter(impl()->getFilter());
     if (filt) {
         filt->mark();
     }
 }
 
 bool DOMTreeWalker::getOwnPropertySlot(ExecState *exec, const Identifier &propertyName, PropertySlot &slot)
 {
     return getStaticValueSlot<DOMTreeWalker, DOMObject>(exec, &DOMTreeWalkerTable, this, propertyName, slot);
 }
 
 JSValue *DOMTreeWalker::getValueProperty(ExecState *exec, int token) const
 {
     DOM::TreeWalkerImpl &tw = *impl();
     switch (token) {
     case Root:
         return getDOMNode(exec, tw.getRoot());
     case WhatToShow:
         return jsNumber(tw.getWhatToShow());
     case Filter:
         return getDOMNodeFilter(exec, tw.getFilter());
     case ExpandEntityReferences:
         return jsBoolean(tw.getExpandEntityReferences());
     case CurrentNode:
         return getDOMNode(exec, tw.getCurrentNode());
     default:
         // qCDebug(KHTML_LOG) << "WARNING: Unhandled token in DOMTreeWalker::getValueProperty : " << token;
         return nullptr;
     }
 }
 
 void DOMTreeWalker::put(ExecState *exec, const Identifier &propertyName,
                         JSValue *value, int attr)
 {
     DOMExceptionTranslator exception(exec);
     if (propertyName == "currentNode") {
         m_impl->setCurrentNode(toNode(value), exception);
     } else {
         JSObject::put(exec, propertyName, value, attr);
     }
 }
 
 JSValue *DOMTreeWalkerProtoFunc::callAsFunction(ExecState *exec, JSObject *thisObj, const List &)
 {
     KJS_CHECK_THIS(KJS::DOMTreeWalker, thisObj);
     DOM::TreeWalkerImpl &treeWalker = *static_cast<DOMTreeWalker *>(thisObj)->impl();
     TraversalExceptionForwarder   filterException(exec);
     switch (id) {
     case DOMTreeWalker::ParentNode:
         return getDOMNode(exec, treeWalker.parentNode(filterException));
     case DOMTreeWalker::FirstChild:
         return getDOMNode(exec, treeWalker.firstChild(filterException));
     case DOMTreeWalker::LastChild:
         return getDOMNode(exec, treeWalker.lastChild(filterException));
     case DOMTreeWalker::PreviousSibling:
         return getDOMNode(exec, treeWalker.previousSibling(filterException));
     case DOMTreeWalker::NextSibling:
         return getDOMNode(exec, treeWalker.nextSibling(filterException));
     case DOMTreeWalker::PreviousNode:
         return getDOMNode(exec, treeWalker.previousNode(filterException));
     case DOMTreeWalker::NextNode:
         return getDOMNode(exec, treeWalker.nextNode(filterException));
     }
     return jsUndefined();
 }
 
 JSValue *KJS::getDOMTreeWalker(ExecState *exec, DOM::TreeWalkerImpl *tw)
 {
     return cacheDOMObject<DOM::TreeWalkerImpl, DOMTreeWalker>(exec, tw);
 }
 
 // -------------------------------------------------------------------------
 
 DOM::NodeFilterImpl *KJS::toNodeFilter(JSValue *val)
 {
     JSObject *obj = val->getObject();
     if (!obj) {
         return nullptr;
     }
 
     return new JSNodeFilter(obj);
 }
 
 JSValue *KJS::getDOMNodeFilter(ExecState *exec, DOM::NodeFilterImpl *nf)
 {
     Q_UNUSED(exec);
     if (nf && nf->isJSFilter()) {
         return static_cast<JSNodeFilter *>(nf)->filter();
     }
 
     return jsNull();
 }
 
 JSNodeFilter::JSNodeFilter(JSObject *_filter) : m_filter(_filter)
 {}
 
 JSNodeFilter::~JSNodeFilter()
 {}
 
 void JSNodeFilter::mark()
 {
     if (!m_filter->marked()) {
         m_filter->mark();
     }
 }
 
 bool JSNodeFilter::isJSFilter() const
 {
     return true;
 }
 
 JSNodeFilter *JSNodeFilter::fromDOMFilter(DOM::NodeFilterImpl *nf)
 {
     if (!nf || !nf->isJSFilter()) {
         return nullptr;
     }
 
     return static_cast<JSNodeFilter *>(nf);
 }
 
 short JSNodeFilter::acceptNode(const DOM::Node &n, void *&bindingsException)
 {
     KHTMLPart *part = n.handle()->document()->part();
     if (!part) {
         return DOM::NodeFilter::FILTER_REJECT;
     }
 
     KJSProxy *proxy = part->jScript();
     if (proxy) {
         ExecState *exec = proxy->interpreter()->globalExec();
         JSObject *fn = nullptr;
 
         // Use a function given directly, or extract it from the acceptNode field
         if (m_filter->implementsCall()) {
             fn = m_filter;
         } else {
             JSObject *acceptNodeFunc = m_filter->get(exec, "acceptNode")->getObject();
             if (acceptNodeFunc && acceptNodeFunc->implementsCall()) {
                 fn = acceptNodeFunc;
             }
         }
 
         if (fn) {
             List args;
             args.append(getDOMNode(exec, n.handle()));
             JSValue *result = fn->call(exec, m_filter, args);
             if (exec->hadException()) {
                 bindingsException = exec->exception();
                 exec->clearException();
                 return DOM::NodeFilter::FILTER_REJECT; // throw '1' isn't accept :-)
             }
             return result->toInteger(exec);
         }
     }
 
     return DOM::NodeFilter::FILTER_REJECT;
 }