genericeventhandler.cxx

SP是一个基于GNU C++编译器

// Copyright (c) 1996 James Clark
// See the file COPYING for copying permission.

#ifdef __GNUG__
#pragma implementation
#endif

#include "splib.h"
#include "GenericEventHandler.h"
#include "macros.h"
#include "ExtendEntityManager.h"

#ifdef SP_NAMESPACE
namespace SP_NAMESPACE {
#endif

class SpOpenEntity : public SGMLApplication::OpenEntity {
public:
  SpOpenEntity(const ConstPtr<Origin> &origin);
  SGMLApplication::Location location(SGMLApplication::Position) const;
private:
  ConstPtr<Origin> origin_;
  StorageObjectLocation soLoc_;
};

inline
void GenericEventHandler::freeAll()
{
  if (allocBlocks_)
    freeAll1();
}

inline
void GenericEventHandler::clearNotation(SGMLApplication::Notation &to)
{
  clearString(to.name);
}

inline
void GenericEventHandler::setLocation(SGMLApplication::Position &pos,
				  const Location &loc)
{
  if (lastOrigin_ != loc.origin())
    setLocation1(pos, loc);
  else
    pos = loc.index();
}

GenericEventHandler::GenericEventHandler(SGMLApplication &app,
					 bool generalEntities)
: app_(&app), generalEntities_(generalEntities),
  freeBlocks_(0), allocBlocks_(0), firstBlockSpare_(0), firstBlockUsed_(0)
{
}

GenericEventHandler::~GenericEventHandler()
{
  freeAll();
  while (freeBlocks_) {
    Block *tem = freeBlocks_;
    freeBlocks_ = freeBlocks_->next;
    delete [] tem->mem;
    delete tem;
  }
}

void GenericEventHandler::freeAll1()
{
  Block **p;
  for (p = &allocBlocks_; *p; p = &(*p)->next)
    ;
  *p = freeBlocks_;
  freeBlocks_ = allocBlocks_;
  allocBlocks_ = 0;
  if (freeBlocks_)
    firstBlockSpare_ = freeBlocks_->size;
  else
    firstBlockSpare_ = 0;
  firstBlockUsed_ = 0;
}

void *GenericEventHandler::allocate(size_t n)
{
  if (n == 0)
    return 0;
  // round up to avoid alignment problems
  n = (n + sizeof(char *) - 1) & ~(sizeof(char *) - 1);
  enum { BIG = 1024 };
  if (n > firstBlockSpare_) {
    if (freeBlocks_ && firstBlockUsed_) {
      Block *tem = freeBlocks_;
      freeBlocks_ = freeBlocks_->next;
      tem->next = allocBlocks_;
      allocBlocks_ = tem;
    }
    if (!freeBlocks_ || freeBlocks_->size < n) {
      Block *tem = new Block;
      tem->size = n < BIG ? int(BIG) : n;
      tem->mem = new char[tem->size];
      tem->next = freeBlocks_;
      freeBlocks_ = tem;
    }
    firstBlockUsed_ = 0;
    firstBlockSpare_ = freeBlocks_->size;
  }
  char *tem = freeBlocks_->mem + firstBlockUsed_;
  firstBlockUsed_ += n;
  firstBlockSpare_ -= n;
  return tem;
}

void GenericEventHandler::startElement(StartElementEvent *event)
{
  SGMLApplication::StartElementEvent appEvent;
  setString(appEvent.gi, event->name());
  const ElementDefinition *def = event->elementType()->definition();
  switch (def->declaredContent()) {
  case ElementDefinition::modelGroup:
    appEvent.contentType
      = (def->compiledModelGroup()->containsPcdata()
	 ? SGMLApplication::StartElementEvent::mixed
	 : SGMLApplication::StartElementEvent::element);
    break;
  case ElementDefinition::any:
    appEvent.contentType = SGMLApplication::StartElementEvent::mixed;
    break;
  case ElementDefinition::cdata:
    appEvent.contentType = SGMLApplication::StartElementEvent::cdata;
    break;
  case ElementDefinition::rcdata:
    appEvent.contentType = SGMLApplication::StartElementEvent::rcdata;
    break;
  case ElementDefinition::empty:
    appEvent.contentType = SGMLApplication::StartElementEvent::empty;
    break;
  }
  appEvent.included = event->included();
  appEvent.nAttributes = event->attributes().size();
  if (appEvent.nAttributes != 0) {
    if (event->attributes().conref())
      appEvent.contentType = SGMLApplication::StartElementEvent::empty;
    setAttributes(appEvent.attributes, event->attributes());
  }
  setLocation(appEvent.pos, event->location());
  app_->startElement(appEvent);
  freeAll();
  delete event;
}

void GenericEventHandler::endElement(EndElementEvent *event)
{
  SGMLApplication::EndElementEvent appEvent;
  setString(appEvent.gi, event->name());
  setLocation(appEvent.pos, event->location());
  app_->endElement(appEvent);
  delete event;
}

void GenericEventHandler::data(DataEvent *event)
{
  SGMLApplication::DataEvent appEvent;
  appEvent.data.ptr = event->data();
  appEvent.data.len = event->dataLength();
  setLocation(appEvent.pos, event->location());
  app_->data(appEvent);
  delete event;
}

void GenericEventHandler::pi(PiEvent *event)
{
  SGMLApplication::PiEvent appEvent;
  appEvent.data.ptr = event->data();
  appEvent.data.len = event->dataLength();
  const Entity *entity = event->entity();
  if (entity)
    setString(appEvent.entityName, entity->name());
  else
    appEvent.entityName.len = 0;
  setLocation(appEvent.pos, event->location());
  app_->pi(appEvent);
  delete event;
}

void GenericEventHandler::sdataEntity(SdataEntityEvent *event)
{
  SGMLApplication::SdataEvent appEvent;
  appEvent.text.ptr = event->data();
  appEvent.text.len = event->dataLength();
  setString(appEvent.entityName, event->entity()->name());
  // Don't want location of chars in entity.
  setLocation(appEvent.pos, event->location().origin()->parent());
  app_->sdata(appEvent);
  delete event;
}

void GenericEventHandler::externalDataEntity(ExternalDataEntityEvent *event)
{
  SGMLApplication::ExternalDataEntityRefEvent appEvent;
  setEntity(appEvent.entity, *event->entity());
  setLocation(appEvent.pos, event->location());
  app_->externalDataEntityRef(appEvent);
  freeAll();
  delete event;
}

void GenericEventHandler::subdocEntity(SubdocEntityEvent *event)
{
  SGMLApplication::SubdocEntityRefEvent appEvent;
  setEntity(appEvent.entity, *event->entity());
  setLocation(appEvent.pos, event->location());
  app_->subdocEntityRef(appEvent);
  freeAll();
  delete event;
}

void GenericEventHandler::nonSgmlChar(NonSgmlCharEvent *event)
{
  SGMLApplication::NonSgmlCharEvent appEvent;
  appEvent.c = event->character();
  setLocation(appEvent.pos, event->location());
  app_->nonSgmlChar(appEvent);
  delete event;
}

void GenericEventHandler::startDtd(StartDtdEvent *event)
{
  SGMLApplication::StartDtdEvent appEvent;
  setString(appEvent.name, event->name());
  const Entity *entity = event->entity().pointer();
  if (entity) {
    appEvent.haveExternalId = 1;
    setExternalId(appEvent.externalId,
		  entity->asExternalEntity()->externalId());
  }
  else
    appEvent.haveExternalId = 0;
  setLocation(appEvent.pos, event->location());
  app_->startDtd(appEvent);
  freeAll();
  delete event;
}

void GenericEventHandler::endDtd(EndDtdEvent *event)
{
  SGMLApplication::EndDtdEvent appEvent;
  setString(appEvent.name, event->dtd().name());
  setLocation(appEvent.pos, event->location());
  app_->endDtd(appEvent);
  delete event;
}

void GenericEventHandler::endProlog(EndPrologEvent *event)
{
  if (generalEntities_) {
    SGMLApplication::GeneralEntityEvent entityEvent;
    const Dtd &dtd = event->dtd();
    Dtd::ConstEntityIter iter(dtd.generalEntityIter());
    for (;;) {
      const Entity *entity = iter.nextTemp();
      if (!entity)
	break;
      setEntity(entityEvent.entity, *entity);
      app_->generalEntity(entityEvent);
    }
    freeAll();
  }
  SGMLApplication::EndPrologEvent appEvent;
  setLocation(appEvent.pos, event->location());
  app_->endProlog(appEvent);
  delete event;
}

void GenericEventHandler::entityDefaulted(EntityDefaultedEvent *event)
{
  if (generalEntities_) {
    SGMLApplication::GeneralEntityEvent appEvent;
    setEntity(appEvent.entity, event->entity());
    app_->generalEntity(appEvent);
  }
  delete event;
}

void GenericEventHandler::appinfo(AppinfoEvent *event)
{
  SGMLApplication::AppinfoEvent appEvent;
  const StringC *str;
  if (event->literal(str)) {
    setString(appEvent.string, *str);
    appEvent.none = 0;
  }
  else
    appEvent.none = 1;
  setLocation(appEvent.pos, event->location());
  app_->appinfo(appEvent);
  delete event;
}

void GenericEventHandler::commentDecl(CommentDeclEvent *event)
{
  SGMLApplication::CommentDeclEvent appEvent;
  appEvent.nComments = 0;
  {
    for (MarkupIter iter(event->markup()); iter.valid(); iter.advance())
      if (iter.type() == Markup::comment)
	appEvent.nComments++;
  }
  SGMLApplication::CharString *comments
    = (SGMLApplication::CharString *)allocate(appEvent.nComments * 2
					      * sizeof(SGMLApplication::CharString));
  appEvent.comments = comments;
  appEvent.seps = appEvent.comments + appEvent.nComments;
  size_t i = 0;
  for (MarkupIter iter(event->markup()); iter.valid(); iter.advance())
    switch (iter.type()) {
    case Markup::comment:
      comments[i].ptr = iter.charsPointer();
      comments[i].len = iter.charsLength();
      clearString(comments[appEvent.nComments + i]);
      i++;
      break;
    case Markup::s:
      comments[appEvent.nComments + i - 1].ptr = iter.charsPointer();
      comments[appEvent.nComments + i - 1].len = iter.charsLength();
      break;
    default:
      break;
    }
  setLocation(appEvent.pos, event->location());
  app_->commentDecl(appEvent);
  freeAll();
  delete event;
}

void GenericEventHandler::markedSectionStart(MarkedSectionStartEvent *event)
{
  SGMLApplication::MarkedSectionStartEvent appEvent;
  unsigned depth = 0;
  appEvent.nParams = 0;
  {
    for (MarkupIter iter(event->markup()); iter.valid(); iter.advance())
      switch (iter.type()) {
      case Markup::reservedName:
	if (!depth)
	  appEvent.nParams++;
	break;
      case Markup::entityStart:
	if (!depth)
	  appEvent.nParams++;
	depth++;
	break;
      case Markup::entityEnd:
	depth--;
	break;
      default:
	break;
      }
  }
  SGMLApplication::MarkedSectionStartEvent::Param *params
    = (SGMLApplication::MarkedSectionStartEvent::Param *)
      allocate(appEvent.nParams * sizeof(appEvent.params[0]));
  appEvent.params = params;
  size_t i = 0;
  for (MarkupIter iter(event->markup()); iter.valid(); iter.advance())
    switch (iter.type()) {
    case Markup::reservedName:
      if (!depth) {
	switch (iter.reservedName()) {
	case Syntax::rTEMP:
	  params[i].type
	    = SGMLApplication::MarkedSectionStartEvent::Param::temp;
	  break;
	case Syntax::rINCLUDE:
	  params[i].type
	    = SGMLApplication::MarkedSectionStartEvent::Param::include;
	  break;
	case Syntax::rRCDATA:
	  params[i].type
	    = SGMLApplication::MarkedSectionStartEvent::Param::rcdata;
	  break;
	case Syntax::rCDATA:
	  params[i].type
	    = SGMLApplication::MarkedSectionStartEvent::Param::cdata;
	  break;
	case Syntax::rIGNORE:
	  params[i].type
	    = SGMLApplication::MarkedSectionStartEvent::Param::ignore;
	  break;
	default:
	  CANNOT_HAPPEN();
	}
	clearString(params[i].entityName);
	i++;
      }
      break;
    case Markup::entityStart:
      if (!depth) {
	params[i].type
	  = SGMLApplication::MarkedSectionStartEvent::Param::entityRef;
	setString(params[i].entityName,
		  iter.entityOrigin()->entity()->name());
	i++;
      }
      depth++;
      break;