kjs_binding.cpp

khtml在gtk上的移植版本

// -*- c-basic-offset: 2 -*-
/*
 *  This file is part of the KDE libraries
 *  Copyright (C) 1999-2001 Harri Porten ([e-mail])
 *  Copyright (C) 2004 Apple Computer, Inc.
 *
 *  This library is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU Lesser 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
 *  Lesser General Public License for more details.
 *
 *  You should have received a copy of the GNU Lesser General Public
 *  License along with this library; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#include "kjs_binding.h"
#include "kjs_dom.h"
#include <kjs/internal.h> // for InterpreterImp

#include "dom/dom_exception.h"
#include "dom/dom2_range.h"
#include "xml/dom2_eventsimpl.h"

#include <kdebug.h>

using DOM::DOMString;

using namespace KJS;

/* TODO:
 * The catch all (...) clauses below shouldn't be necessary.
 * But they helped to view for example www.faz.net in an stable manner.
 * Those unknown exceptions should be treated as severe bugs and be fixed.
 *
 * these may be CSS exceptions - need to check - pmk
 */

Value DOMObject::get(ExecState *exec, const Identifier &p) const
{
  Value result;
#ifdef KHTML_NO_EXCEPTIONS
  DOM::_exceptioncode = 0;
  result = tryGet(exec,p);

  if (DOM::_exceptioncode) {
    // ### translate code into readable string ?
    // ### oh, and s/QString/i18n or I18N_NOOP (the code in kjs uses I18N_NOOP... but where is it translated ?)
    //     and where does it appear to the user ?
    Object err = Error::create(exec, GeneralError, QString("Exception %1").arg(DOM::_exceptioncode).local8Bit());
    exec->setException( err );
    result = Undefined();
  }
#else  
  try {
    result = tryGet(exec,p);
  }
  catch (DOM::DOMException e) {
    // ### translate code into readable string ?
    // ### oh, and s/QString/i18n or I18N_NOOP (the code in kjs uses I18N_NOOP... but where is it translated ?)
    //     and where does it appear to the user ?
    Object err = Error::create(exec, GeneralError, QString("DOM exception %1").arg(e.code).local8Bit());
    err.put(exec, "code", Number(e.code));
    exec->setException( err );
    result = Undefined();
  }
  catch (...) {
    kdError(6070) << "Unknown exception in DOMObject::get()" << endl;
    result = String("Unknown exception");
  }
#endif
  return result;
}

void DOMObject::put(ExecState *exec, const Identifier &propertyName,
                    const Value &value, int attr)
{
#ifdef KHTML_NO_EXCEPTIONS
  DOM::_exceptioncode = 0;
  tryPut(exec, propertyName, value, attr);
  
  if (DOM::_exceptioncode) {
    Object err = Error::create(exec, GeneralError, QString("DOM exception %1").arg(DOM::_exceptioncode).local8Bit());
    exec->setException(err);
  }
#else
  try {
    tryPut(exec, propertyName, value, attr);
  }
  catch (DOM::DOMException e) {
    Object err = Error::create(exec, GeneralError, QString("DOM exception %1").arg(e.code).local8Bit());
    err.put(exec, "code", Number(e.code));
    exec->setException(err);
  }
  catch (...) {
    kdError(6070) << "Unknown exception in DOMObject::put()" << endl;
  }
#endif
}

UString DOMObject::toString(ExecState *) const
{
  return "[object " + className() + "]";
}

Value DOMFunction::get(ExecState *exec, const Identifier &propertyName) const
{
  Value result;
#ifdef KHTML_NO_EXCEPTIONS
  DOM::_exceptioncode = 0;
  
  result = tryGet(exec, propertyName);
  
  if (DOM::_exceptioncode) {
    result = Undefined();
    Object err = Error::create(exec, GeneralError, QString("DOM exception %1").arg(DOM::_exceptioncode).local8Bit());
    exec->setException(err);
  }
#else  
  try {
    result = tryGet(exec, propertyName);
  }
  catch (DOM::DOMException e) {
    result = Undefined();
    Object err = Error::create(exec, GeneralError, QString("DOM exception %1").arg(e.code).local8Bit());
    err.put(exec, "code", Number(e.code));
    exec->setException(err);
  }
  catch (...) {
    kdError(6070) << "Unknown exception in DOMFunction::get()" << endl;
    result = String("Unknown exception");
  }
#endif
  return result;
}

Value DOMFunction::call(ExecState *exec, Object &thisObj, const List &args)
{
  Value val;
#ifdef KHTML_NO_EXCEPTIONS
  DOM::_exceptioncode = 0;
  val = tryCall(exec, thisObj, args);

  // pity there's no way to distinguish between these in JS code
  if (DOM::_exceptioncode)
  {
    Object err = Error::create(exec, GeneralError, QString("DOM Exception %1").arg(DOM::_exceptioncode).local8Bit());
    err.put(exec, "code", Number(DOM::_exceptioncode));
    exec->setException(err);
  }
#else  
  try {
    val = tryCall(exec, thisObj, args);
  }
  // pity there's no way to distinguish between these in JS code
  catch (DOM::DOMException e) {
    Object err = Error::create(exec, GeneralError, QString("DOM Exception %1").arg(e.code).local8Bit());
    err.put(exec, "code", Number(e.code));
    exec->setException(err);
  }
  catch (DOM::RangeException e) {
    Object err = Error::create(exec, GeneralError, QString("DOM Range Exception %1").arg(e.code).local8Bit());
    err.put(exec, "code", Number(e.code));
    exec->setException(err);
  }
  catch (DOM::CSSException e) {
    Object err = Error::create(exec, GeneralError, QString("CSS Exception %1").arg(e.code).local8Bit());
    err.put(exec, "code", Number(e.code));
    exec->setException(err);
  }
  catch (DOM::EventException e) {
    Object err = Error::create(exec, GeneralError, QString("DOM Event Exception %1").arg(e.code).local8Bit());
    err.put(exec, "code", Number(e.code));
    exec->setException(err);
  }
  catch (...) {
    kdError(6070) << "Unknown exception in DOMFunction::call()" << endl;
    Object err = Error::create(exec, GeneralError, "Unknown exception");
    exec->setException(err);
  }
#endif
  return val;
}

static QPtrDict<DOMObject> * staticDomObjects = 0;
QPtrDict< QPtrDict<DOMObject> > * staticDomObjectsPerDocument = 0;

QPtrDict<DOMObject> & ScriptInterpreter::domObjects()
{
  if (!staticDomObjects) {
    staticDomObjects = new QPtrDict<DOMObject>(1021);
  }
  return *staticDomObjects;
}

QPtrDict< QPtrDict<DOMObject> > & ScriptInterpreter::domObjectsPerDocument()
{
  if (!staticDomObjectsPerDocument) {
    staticDomObjectsPerDocument = new QPtrDict<QPtrDict<DOMObject> >();
    staticDomObjectsPerDocument->setAutoDelete(true);
  }
  return *staticDomObjectsPerDocument;
}


ScriptInterpreter::ScriptInterpreter( const Object &global, KHTMLPart* part )
  : Interpreter( global ), m_part( part ),
    m_evt( 0L ), m_inlineCode(false), m_timerCallback(false)
{
#ifdef KJS_VERBOSE
  kdDebug(6070) << "ScriptInterpreter::ScriptInterpreter " << this << " for part=" << m_part << endl;
#endif
}

ScriptInterpreter::~ScriptInterpreter()
{
#ifdef KJS_VERBOSE
  kdDebug(6070) << "ScriptInterpreter::~ScriptInterpreter " << this << " for part=" << m_part << endl;
#endif
}

void ScriptInterpreter::forgetDOMObject( void* objectHandle )
{
  deleteDOMObject( objectHandle );
}

DOMObject* ScriptInterpreter::getDOMObjectForDocument( DOM::DocumentImpl* documentHandle, void *objectHandle )
{
  QPtrDict<DOMObject> *documentDict = (QPtrDict<DOMObject> *)domObjectsPerDocument()[documentHandle];
  if (documentDict) {
    return (*documentDict)[objectHandle];
  }

  return NULL;
}

void ScriptInterpreter::putDOMObjectForDocument( DOM::DocumentImpl* documentHandle, void *objectHandle, DOMObject *obj )
{
  QPtrDict<DOMObject> *documentDict = (QPtrDict<DOMObject> *)domObjectsPerDocument()[documentHandle];
  if (!documentDict) {
    documentDict = new QPtrDict<DOMObject>();
    domObjectsPerDocument().insert(documentHandle, documentDict);
  }

  documentDict->insert( objectHandle, obj );
}

bool ScriptInterpreter::deleteDOMObjectsForDocument( DOM::DocumentImpl* documentHandle )
{
  return domObjectsPerDocument().remove( documentHandle );
}

void ScriptInterpreter::mark()
{
  QPtrDictIterator<QPtrDict<DOMObject> > dictIterator(domObjectsPerDocument());

  QPtrDict<DOMObject> *objectDict;
  while ((objectDict = dictIterator.current())) {
    QPtrDictIterator<DOMObject> objectIterator(*objectDict);

    DOMObject *obj;
    while ((obj = objectIterator.current())) {
      if (!obj->marked()) {
	obj->mark();
      }
      ++objectIterator;
    }
    ++dictIterator;
  }
}

void ScriptInterpreter::forgetDOMObjectsForDocument( DOM::DocumentImpl* documentHandle )
{
  deleteDOMObjectsForDocument( documentHandle );
}

void ScriptInterpreter::updateDOMObjectDocument(void *objectHandle, DOM::DocumentImpl *oldDoc, DOM::DocumentImpl *newDoc)
{
  DOMObject* cachedObject = getDOMObjectForDocument(oldDoc, objectHandle);
  if (cachedObject) {
    putDOMObjectForDocument(newDoc, objectHandle, cachedObject);
  }
}

bool ScriptInterpreter::wasRunByUserGesture() const
{
  if ( m_evt )
  {
    int id = m_evt->handle()->id();
    bool eventOk = ( // mouse events
      id == DOM::EventImpl::CLICK_EVENT || id == DOM::EventImpl::MOUSEDOWN_EVENT ||
      id == DOM::EventImpl::MOUSEUP_EVENT || id == DOM::EventImpl::KHTML_DBLCLICK_EVENT ||
      id == DOM::EventImpl::KHTML_CLICK_EVENT ||
      // keyboard events
      id == DOM::EventImpl::KEYDOWN_EVENT || id == DOM::EventImpl::KEYPRESS_EVENT ||
      id == DOM::EventImpl::KEYUP_EVENT ||
      // other accepted events
      id == DOM::EventImpl::SELECT_EVENT || id == DOM::EventImpl::CHANGE_EVENT ||
      id == DOM::EventImpl::FOCUS_EVENT || id == DOM::EventImpl::BLUR_EVENT ||
      id == DOM::EventImpl::SUBMIT_EVENT );
    kdDebug(6070) << "Window.open, smart policy: id=" << id << " eventOk=" << eventOk << endl;
    if (eventOk)
      return true;
  } else // no event
  {
    if ( m_inlineCode  && !m_timerCallback )
    {
      // This is the <a href="javascript:window.open('...')> case -> we let it through
      return true;
      kdDebug(6070) << "Window.open, smart policy, no event, inline code -> ok" << endl;
    }
    else // This is the <script>window.open(...)</script> case or a timer callback -> block it
      kdDebug(6070) << "Window.open, smart policy, no event, <script> tag -> refused" << endl;
  }
  return false;
}

//////

UString::UString(const QString &d)
{
  unsigned int len = d.length();
#if KWIQ
  UChar *dat = (UChar*) malloc(len*sizeof(UChar)); // UString::Rep::destroy() uses free()
#else
  UChar *dat = new UChar[len];
#endif
  memcpy(dat, d.unicode(), len * sizeof(UChar));
  rep = UString::Rep::create(dat, len);
}

UString::UString(const DOMString &d)
{
  if (d.isNull()) {
    attach(&Rep::null);
    return;
  }

  unsigned int len = d.length();
#if KWIQ
  UChar *dat = (UChar*) malloc(len*sizeof(UChar)); // UString::Rep::destroy() uses free()
#else
  UChar *dat = new UChar[len];
#endif
  memcpy(dat, d.unicode(), len * sizeof(UChar));
  rep = UString::Rep::create(dat, len);
}

DOMString UString::string() const
{
  if (isNull())
    return DOMString();
  if (isEmpty())
    return DOMString("");
  return DOMString((QChar*) data(), size());
}

QString UString::qstring() const
{
  if (isNull())
    return QString();
  if (isEmpty())
    return QString("");
  return QString((QChar*) data(), size());
}

QConstString UString::qconststring() const
{
  return QConstString((QChar*) data(), size());
}

DOMString Identifier::string() const
{
  if (isNull())
    return DOMString();
  if (isEmpty())
    return DOMString("");
  return DOMString((QChar*) data(), size());
}

QString Identifier::qstring() const
{
  if (isNull())
    return QString();
  if (isEmpty())
    return QString("");
  return QString((QChar*) data(), size());
}

DOM::Node KJS::toNode(const Value& val)
{
  Object obj = Object::dynamicCast(val);
  if (obj.isNull() || !obj.inherits(&DOMNode::info))
    return DOM::Node();

  const DOMNode *dobj = static_cast<const DOMNode*>(obj.imp());
  return dobj->toNode();
}

Value KJS::getStringOrNull(DOMString s)
{
  if (s.isNull())
    return Null();
  else
    return String(s);
}

QVariant KJS::ValueToVariant(ExecState* exec, const Value &val) {
  QVariant res;
  switch (val.type()) {
  case BooleanType:
    res = QVariant(val.toBoolean(exec), 0);
    break;
  case NumberType:
    res = QVariant(val.toNumber(exec));
    break;
  case StringType:
    res = QVariant(val.toString(exec).qstring());
    break;
  default:
    // everything else will be 'invalid'
    break;
  }
  return res;
}