kjs_debugwin.cpp

konqueror3 embedded版本, KDE环境下的当家浏览器的嵌入式版本源码包.

  return (m_mode != Stop);
}

bool KJSDebugWin::sourceUnused(KJS::ExecState *exec, int sourceId)
{
  // Verify that there aren't any contexts on the stack using the given sourceId
  // This should never be the case because this function is only called when
  // the interpreter has deleted all Node objects for the source.
  for (int e = 0; e < m_execsCount; e++)
    assert(m_execs[e]->context().sourceId() != sourceId);

  // Now remove the fragment (and the SourceFile, if it was the last fragment in that file)
  SourceFragment *fragment = m_sourceFragments[sourceId];
  if (fragment) {
    m_sourceFragments.erase(sourceId);

    SourceFile *sourceFile = fragment->sourceFile;
    if (sourceFile->hasOneRef()) {
      for (int i = 0; i < m_sourceSel->count(); i++) {
	if (m_sourceSelFiles.at(i) == sourceFile) {
	  m_sourceSel->removeItem(i);
	  m_sourceSelFiles.remove(i);
	  break;
	}
      }
      removeSourceFile(exec->interpreter(),sourceFile->url);
    }
    delete fragment;
  }

  return (m_mode != Stop);
}

bool KJSDebugWin::exception(ExecState *exec, const Value &value, bool inTryCatch)
{
  assert(value.isValid());

  // Ignore exceptions that will be caught by the script
  if (inTryCatch)
    return true;

  KParts::ReadOnlyPart *part = static_cast<ScriptInterpreter*>(exec->interpreter())->part();
  KHTMLPart *khtmlpart = ::qt_cast<KHTMLPart*>(part);
  if (khtmlpart && !khtmlpart->settings()->isJavaScriptErrorReportingEnabled())
    return true;

  QWidget *dlgParent = (m_evalDepth == 0) ? (QWidget*)part->widget() : (QWidget*)this;

  QString exceptionMsg = value.toString(exec).qstring();

  // Syntax errors are a special case. For these we want to display the url & lineno,
  // which isn't included in the exception messeage. So we work it out from the values
  // passed to sourceParsed()
  Object valueObj = Object::dynamicCast(value);
  Object syntaxError = exec->interpreter()->builtinSyntaxError();
  if (valueObj.isValid() && valueObj.get(exec,"constructor").imp() == syntaxError.imp()) {
    Value sidValue = valueObj.get(exec,"sid");
    if (sidValue.isA(NumberType)) { // sid is not set for Function() constructor
      int sourceId = (int)sidValue.toNumber(exec);
      assert(m_sourceFragments[sourceId]);
      exceptionMsg = i18n("Parse error at %1 line %2")
		     .arg(m_sourceFragments[sourceId]->sourceFile->url)
		     .arg(m_sourceFragments[sourceId]->baseLine+m_sourceFragments[sourceId]->errorLine-1);
    }
  }

  bool dontShowAgain = false;
  if (m_execsCount == 0) {
    // An exception occurred and we're not currently executing any code... this can
    // happen in some cases e.g. a parse error, or native code accessing funcitons like
    // Object::put()
    QString msg = i18n("An error occurred while attempting to run a script on this page.\n\n%1")
		  .arg(exceptionMsg);
    KJSErrorDialog dlg(dlgParent,msg,false);
    dlg.exec();
    dontShowAgain = dlg.dontShowAgain();
  }
  else {
    Context ctx = m_execs[m_execsCount-1]->context();
    SourceFragment *sourceFragment = m_sourceFragments[ctx.sourceId()];
    QString msg = i18n("An error occurred while attempting to run a script on this page.\n\n%1 line %2:\n%3")
		  .arg(KStringHandler::rsqueeze( sourceFragment->sourceFile->url,80),
		  QString::number( sourceFragment->baseLine+ctx.curStmtFirstLine()-1),
		  exceptionMsg);

    KJSErrorDialog dlg(dlgParent,msg,true);
    dlg.exec();
    dontShowAgain = dlg.dontShowAgain();

    if (dlg.debugSelected()) {
      m_mode = Next;
      m_steppingDepth = m_execsCount-1;
      enterSession(exec);
    }
  }

  if (dontShowAgain) {
    KConfig *config = kapp->config();
    KConfigGroupSaver saver(config,QString::fromLatin1("Java/JavaScript Settings"));
    config->writeEntry("ReportJavaScriptErrors",QVariant(false,0));
    config->sync();
    QByteArray data;
    kapp->dcopClient()->send( "konqueror*", "KonquerorIface", "reparseConfiguration()", data );
  }

  return (m_mode != Stop);
}

bool KJSDebugWin::atStatement(KJS::ExecState *exec)
{
  assert(m_execsCount > 0);
  assert(m_execs[m_execsCount-1] == exec);
  checkBreak(exec);
  return (m_mode != Stop);
}

bool KJSDebugWin::enterContext(ExecState *exec)
{
  if (m_execsCount >= m_execsAlloc) {
    m_execsAlloc += 10;
    m_execs = (ExecState**)realloc(m_execs,m_execsAlloc*sizeof(ExecState*));
  }
  m_execs[m_execsCount++] = exec;

  if (m_mode == Step)
    m_steppingDepth = m_execsCount-1;

  checkBreak(exec);
  return (m_mode != Stop);
}

bool KJSDebugWin::exitContext(ExecState *exec, const Completion &/*completion*/)
{
  assert(m_execsCount > 0);
  assert(m_execs[m_execsCount-1] == exec);

  checkBreak(exec);

  m_execsCount--;
  if (m_steppingDepth > m_execsCount-1)
    m_steppingDepth = m_execsCount-1;
  if (m_execsCount == 0)
    updateContextList();

  return (m_mode != Stop);
}

void KJSDebugWin::displaySourceFile(SourceFile *sourceFile, bool forceRefresh)
{
  if (m_curSourceFile == sourceFile && !forceRefresh)
    return;
  sourceFile->ref();
  m_sourceDisplay->setSource(sourceFile);
  if (m_curSourceFile)
     m_curSourceFile->deref();
  m_curSourceFile = sourceFile;
}

void KJSDebugWin::setSourceLine(int sourceId, int lineno)
{
  SourceFragment *source = m_sourceFragments[sourceId];
  if (!source)
    return;

  SourceFile *sourceFile = source->sourceFile;
  if (m_curSourceFile != source->sourceFile) {
      for (int i = 0; i < m_sourceSel->count(); i++)
	if (m_sourceSelFiles.at(i) == sourceFile)
	  m_sourceSel->setCurrentItem(i);
      displaySourceFile(sourceFile,false);
  }
  m_sourceDisplay->setCurrentLine(source->baseLine+lineno-2);
}

void KJSDebugWin::setNextSourceInfo(QString url, int baseLine)
{
  m_nextSourceUrl = url;
  m_nextSourceBaseLine = baseLine;
}

void KJSDebugWin::sourceChanged(Interpreter *interpreter, QString url)
{
  SourceFile *sourceFile = getSourceFile(interpreter,url);
  if (sourceFile && m_curSourceFile == sourceFile)
    displaySourceFile(sourceFile,true);
}

void KJSDebugWin::clearInterpreter(Interpreter *interpreter)
{
  QMap<int,SourceFragment*>::Iterator it;

  for (it = m_sourceFragments.begin(); it != m_sourceFragments.end(); ++it)
    if (it.data() && it.data()->sourceFile->interpreter == interpreter)
      it.data()->sourceFile->interpreter = 0;
}

SourceFile *KJSDebugWin::getSourceFile(Interpreter *interpreter, QString url)
{
  QString key = QString("%1|%2").arg((long)interpreter).arg(url);
  return m_sourceFiles[key];
}

void KJSDebugWin::setSourceFile(Interpreter *interpreter, QString url, SourceFile *sourceFile)
{
  QString key = QString("%1|%2").arg((long)interpreter).arg(url);
  sourceFile->ref();
  if (SourceFile* oldFile = m_sourceFiles[key])
    oldFile->deref();
  m_sourceFiles[key] = sourceFile;
}

void KJSDebugWin::removeSourceFile(Interpreter *interpreter, QString url)
{
  QString key = QString("%1|%2").arg((long)interpreter).arg(url);
  if (SourceFile* oldFile = m_sourceFiles[key])
    oldFile->deref();
  m_sourceFiles.remove(key);
}

void KJSDebugWin::checkBreak(ExecState *exec)
{
  if (m_breakpointCount > 0) {
    Context ctx = m_execs[m_execsCount-1]->context();
    if (haveBreakpoint(ctx.sourceId(),ctx.curStmtFirstLine(),ctx.curStmtLastLine())) {
      m_mode = Next;
      m_steppingDepth = m_execsCount-1;
    }
  }

  if ((m_mode == Step || m_mode == Next) && m_steppingDepth == m_execsCount-1)
    enterSession(exec);
}

void KJSDebugWin::enterSession(ExecState *exec)
{
  // This "enters" a new debugging session, i.e. enables usage of the debugging window
  // It re-enters the qt event loop here, allowing execution of other parts of the
  // program to continue while the script is stopped. We have to be a bit careful here,
  // i.e. make sure the user can't quit the app, and disable other event handlers which
  // could interfere with the debugging session.
  if (!isVisible())
    show();

  m_mode = Continue;

  if (m_execStates.isEmpty()) {
    disableOtherWindows();
    m_nextAction->setEnabled(true);
    m_stepAction->setEnabled(true);
    m_continueAction->setEnabled(true);
    m_stopAction->setEnabled(true);
    m_breakAction->setEnabled(false);
  }
  m_execStates.push(exec);

  updateContextList();

  qApp->enter_loop(); // won't return until leaveSession() is called
}

void KJSDebugWin::leaveSession()
{
  // Disables debugging for this window and returns to execute the rest of the script
  // (or aborts execution, if the user pressed stop). When this returns, the program
  // will exit the qt event loop, i.e. return to whatever processing was being done
  // before the debugger was stopped.
  assert(!m_execStates.isEmpty());

  m_execStates.pop();

  if (m_execStates.isEmpty()) {
    m_nextAction->setEnabled(false);
    m_stepAction->setEnabled(false);
    m_continueAction->setEnabled(false);
    m_stopAction->setEnabled(false);
    m_breakAction->setEnabled(true);
    m_sourceDisplay->setCurrentLine(-1);
    enableOtherWindows();
  }

  qApp->exit_loop();
}

void KJSDebugWin::updateContextList()
{
  disconnect(m_contextList,SIGNAL(highlighted(int)),this,SLOT(slotShowFrame(int)));

  m_contextList->clear();
  for (int i = 0; i < m_execsCount; i++)
    m_contextList->insertItem(contextStr(m_execs[i]->context()));

  if (m_execsCount > 0) {
    m_contextList->setSelected(m_execsCount-1, true);
    Context ctx = m_execs[m_execsCount-1]->context();
    setSourceLine(ctx.sourceId(),ctx.curStmtFirstLine());
  }

  connect(m_contextList,SIGNAL(highlighted(int)),this,SLOT(slotShowFrame(int)));
}

QString KJSDebugWin::contextStr(const Context &ctx)
{
  QString str = "";
  SourceFragment *sourceFragment = m_sourceFragments[ctx.sourceId()];
  QString url = sourceFragment->sourceFile->url;
  int fileLineno = sourceFragment->baseLine+ctx.curStmtFirstLine()-1;

  switch (ctx.codeType()) {
  case GlobalCode:
    str = QString("Global code at %1:%2").arg(url).arg(fileLineno);
    break;
  case EvalCode:
    str = QString("Eval code at %1:%2").arg(url).arg(fileLineno);
    break;
  case FunctionCode:
    if (!ctx.functionName().isNull())
      str = QString("%1() at %2:%3").arg(ctx.functionName().qstring()).arg(url).arg(fileLineno);
    else
      str = QString("Anonymous function at %1:%2").arg(url).arg(fileLineno);
    break;
  }

  return str;
}

bool KJSDebugWin::setBreakpoint(int sourceId, int lineno)
{
  if (haveBreakpoint(sourceId,lineno,lineno))
    return false;

  m_breakpointCount++;
  m_breakpoints = static_cast<Breakpoint*>(realloc(m_breakpoints,
						   m_breakpointCount*sizeof(Breakpoint)));
  m_breakpoints[m_breakpointCount-1].sourceId = sourceId;
  m_breakpoints[m_breakpointCount-1].lineno = lineno;

  return true;
}

bool KJSDebugWin::deleteBreakpoint(int sourceId, int lineno)
{
  for (int i = 0; i < m_breakpointCount; i++) {
    if (m_breakpoints[i].sourceId == sourceId && m_breakpoints[i].lineno == lineno) {

      memmove(m_breakpoints+i,m_breakpoints+i+1,(m_breakpointCount-i-1)*sizeof(Breakpoint));
      m_breakpointCount--;
      m_breakpoints = static_cast<Breakpoint*>(realloc(m_breakpoints,
						       m_breakpointCount*sizeof(Breakpoint)));
      return true;
    }
  }

  return false;
}

bool KJSDebugWin::haveBreakpoint(SourceFile *sourceFile, int line0, int line1)
{
  for (int i = 0; i < m_breakpointCount; i++) {
    int sourceId = m_breakpoints[i].sourceId;
    int lineno = m_breakpoints[i].lineno;
    if (m_sourceFragments.contains(sourceId) &&
        m_sourceFragments[sourceId]->sourceFile == sourceFile) {
      int absLineno = m_sourceFragments[sourceId]->baseLine+lineno-1;
      if (absLineno >= line0 && absLineno <= line1)
	return true;
    }
  }

  return false;
}

#include "kjs_debugwin.moc"

#endif // KJS_DEBUGGER