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.

  QSplitter *hsplitter = new QSplitter(Qt::Vertical,mainWidget);
  QSplitter *vsplitter = new QSplitter(hsplitter);
  QFont font(KGlobalSettings::fixedFont());

  QWidget *contextContainer = new QWidget(vsplitter);

  QLabel *contextLabel = new QLabel(i18n("Call stack"),contextContainer);
  QWidget *contextListContainer = new QWidget(contextContainer);
  m_contextList = new QListBox(contextListContainer);
  m_contextList->setMinimumSize(100,200);
  connect(m_contextList,SIGNAL(highlighted(int)),this,SLOT(slotShowFrame(int)));

  QHBoxLayout *clistLayout = new QHBoxLayout(contextListContainer);
  clistLayout->addWidget(m_contextList);
  clistLayout->addSpacing(KDialog::spacingHint());

  QVBoxLayout *contextLayout = new QVBoxLayout(contextContainer);
  contextLayout->addWidget(contextLabel);
  contextLayout->addSpacing(KDialog::spacingHint());
  contextLayout->addWidget(contextListContainer);

  // source selection & display
  QWidget *sourceSelDisplay = new QWidget(vsplitter);
  QVBoxLayout *ssdvl = new QVBoxLayout(sourceSelDisplay);

  m_sourceSel = new QComboBox(toolBar());
  connect(m_sourceSel,SIGNAL(activated(int)),this,SLOT(slotSourceSelected(int)));

  m_sourceDisplay = new SourceDisplay(this,sourceSelDisplay);
  ssdvl->addWidget(m_sourceDisplay);
  connect(m_sourceDisplay,SIGNAL(lineDoubleClicked(int)),SLOT(slotToggleBreakpoint(int)));

  QValueList<int> vsplitSizes;
  vsplitSizes.insert(vsplitSizes.end(),120);
  vsplitSizes.insert(vsplitSizes.end(),480);
  vsplitter->setSizes(vsplitSizes);

  // evaluate

  QWidget *evalContainer = new QWidget(hsplitter);

  QLabel *evalLabel = new QLabel(i18n("JavaScript console"),evalContainer);
  m_evalEdit = new EvalMultiLineEdit(evalContainer);
  m_evalEdit->setWordWrap(QMultiLineEdit::NoWrap);
  m_evalEdit->setFont(font);
  connect(m_evalEdit,SIGNAL(returnPressed()),SLOT(slotEval()));
  m_evalDepth = 0;

  QVBoxLayout *evalLayout = new QVBoxLayout(evalContainer);
  evalLayout->addSpacing(KDialog::spacingHint());
  evalLayout->addWidget(evalLabel);
  evalLayout->addSpacing(KDialog::spacingHint());
  evalLayout->addWidget(m_evalEdit);

  QValueList<int> hsplitSizes;
  hsplitSizes.insert(hsplitSizes.end(),400);
  hsplitSizes.insert(hsplitSizes.end(),200);
  hsplitter->setSizes(hsplitSizes);

  vl->addWidget(hsplitter);

  // actions
  KPopupMenu *debugMenu = new KPopupMenu(this);
  menuBar()->insertItem("&Debug",debugMenu);

  m_actionCollection = new KActionCollection(this);
  m_actionCollection->setInstance(this);
  m_nextAction       = new KAction(i18n("Next breakpoint","&Next"),"dbgnext",KShortcut(),this,SLOT(slotNext()),
				   m_actionCollection,"next");
  m_stepAction       = new KAction(i18n("&Step"),"dbgstep",KShortcut(),this,SLOT(slotStep()),
				   m_actionCollection,"step");
  m_continueAction   = new KAction(i18n("&Continue"),"dbgrun",KShortcut(),this,SLOT(slotContinue()),
				   m_actionCollection,"cont");
  m_stopAction       = new KAction(i18n("St&op"),"stop",KShortcut(),this,SLOT(slotStop()),
				   m_actionCollection,"stop");
  m_breakAction      = new KAction(i18n("&Break at Next Statement"),"dbgrunto",KShortcut(),this,SLOT(slotBreakNext()),
				   m_actionCollection,"breaknext");

  m_nextAction->setToolTip(i18n("Next breakpoint","Next"));
  m_stepAction->setToolTip(i18n("Step"));
  m_continueAction->setToolTip(i18n("Continue"));
  m_stopAction->setToolTip(i18n("Stop"));
  m_breakAction->setToolTip("Break at next Statement");

  m_nextAction->setEnabled(false);
  m_stepAction->setEnabled(false);
  m_continueAction->setEnabled(false);
  m_stopAction->setEnabled(false);
  m_breakAction->setEnabled(true);

  m_nextAction->plug(debugMenu);
  m_stepAction->plug(debugMenu);
  m_continueAction->plug(debugMenu);
//   m_stopAction->plug(debugMenu); ### disabled until DebuggerImp::stop() works reliably
  m_breakAction->plug(debugMenu);

  m_nextAction->plug(toolBar());
  m_stepAction->plug(toolBar());
  m_continueAction->plug(toolBar());
//   m_stopAction->plug(toolBar()); ###
  m_breakAction->plug(toolBar());

  toolBar()->insertWidget(1,300,m_sourceSel);
  toolBar()->setItemAutoSized(1);

  updateContextList();
  setMinimumSize(300,200);
  resize(600,450);

}

KJSDebugWin::~KJSDebugWin()
{
  free(m_breakpoints);
  free(m_execs);
}

KJSDebugWin *KJSDebugWin::createInstance()
{
  assert(!kjs_html_debugger);
  kjs_html_debugger = new KJSDebugWin();
  return kjs_html_debugger;
}

void KJSDebugWin::destroyInstance()
{
  assert(kjs_html_debugger);
  kjs_html_debugger->hide();
  delete kjs_html_debugger;
}

void KJSDebugWin::slotNext()
{
  m_mode = Next;
  leaveSession();
}

void KJSDebugWin::slotStep()
{
  m_mode = Step;
  leaveSession();
}

void KJSDebugWin::slotContinue()
{
  m_mode = Continue;
  leaveSession();
}

void KJSDebugWin::slotStop()
{
  m_mode = Stop;
  while (!m_execStates.isEmpty())
    leaveSession();
}

void KJSDebugWin::slotBreakNext()
{
  m_mode = Step;
}

void KJSDebugWin::slotToggleBreakpoint(int lineno)
{
  if (m_sourceSel->currentItem() < 0)
    return;

  SourceFile *sourceFile = m_sourceSelFiles.at(m_sourceSel->currentItem());

  // Find the source fragment containing the selected line (if any)
  int sourceId = -1;
  int highestBaseLine = -1;
  QMap<int,SourceFragment*>::Iterator it;

  for (it = m_sourceFragments.begin(); it != m_sourceFragments.end(); ++it) {
    SourceFragment *sourceFragment = it.data();
    if (sourceFragment &&
	sourceFragment->sourceFile == sourceFile &&
	sourceFragment->baseLine <= lineno &&
	sourceFragment->baseLine > highestBaseLine) {

	sourceId = sourceFragment->sourceId;
	highestBaseLine = sourceFragment->baseLine;
    }
  }

  if (sourceId < 0)
    return;

  // Update the source code display with the appropriate icon
  int fragmentLineno = lineno-highestBaseLine+1;
  if (!setBreakpoint(sourceId,fragmentLineno)) // was already set
    deleteBreakpoint(sourceId,fragmentLineno);

  m_sourceDisplay->updateContents();
}

void KJSDebugWin::slotShowFrame(int frameno)
{
  if (frameno < 0 || frameno >= m_execsCount)
    return;

  Context ctx = m_execs[frameno]->context();
  setSourceLine(ctx.sourceId(),ctx.curStmtFirstLine());
}

void KJSDebugWin::slotSourceSelected(int sourceSelIndex)
{
  // A source file has been selected from the drop-down list - display the file
  if (sourceSelIndex < 0 || sourceSelIndex >= (int)m_sourceSel->count())
    return;
  SourceFile *sourceFile = m_sourceSelFiles.at(sourceSelIndex);
  displaySourceFile(sourceFile,true);

  // If the currently selected context is in the current source file, then hilight
  // the line it's on.
  if (m_contextList->currentItem() >= 0) {
    Context ctx = m_execs[m_contextList->currentItem()]->context();
    if (m_sourceFragments[ctx.sourceId()]->sourceFile == m_sourceSelFiles.at(sourceSelIndex))
      setSourceLine(ctx.sourceId(),ctx.curStmtFirstLine());
  }
}

void KJSDebugWin::slotEval()
{
  // Work out which execution state to use. If we're currently in a debugging session,
  // use the current context - otherwise, use the global execution state from the interpreter
  // corresponding to the currently displayed source file.
  ExecState *exec;
  Object thisobj;
  if (m_execStates.isEmpty()) {
    if (m_sourceSel->currentItem() < 0)
      return;
    SourceFile *sourceFile = m_sourceSelFiles.at(m_sourceSel->currentItem());
    if (!sourceFile->interpreter)
      return;
    exec = sourceFile->interpreter->globalExec();
    thisobj = exec->interpreter()->globalObject();
  }
  else {
    exec = m_execStates.top();
    thisobj = exec->context().thisValue();
  }

  // Evaluate the js code from m_evalEdit
  UString code(m_evalEdit->code());
  QString msg;

  KJSCPUGuard guard;
  guard.start();

  Interpreter *interp = exec->interpreter();

  Object obj = Object::dynamicCast(interp->globalObject().get(exec, "eval"));
  List args;
  args.append(String(code));

  m_evalDepth++;
  Value retval = obj.call(exec, thisobj, args);
  m_evalDepth--;
  guard.stop();

  // Print the return value or exception message to the console
  if (exec->hadException()) {
    Value exc = exec->exception();
    exec->clearException();
    msg = "Exception: " + exc.toString(interp->globalExec()).qstring();
  }
  else {
    msg = retval.toString(interp->globalExec()).qstring();
  }

  m_evalEdit->insert(msg+"\n");
  updateContextList();
}

void KJSDebugWin::closeEvent(QCloseEvent *e)
{
  while (!m_execStates.isEmpty()) // ### not sure if this will work
    leaveSession();
  return QWidget::closeEvent(e);
}

bool KJSDebugWin::eventFilter(QObject *o, QEvent *e)
{
  switch (e->type()) {
  case QEvent::MouseButtonPress:
  case QEvent::MouseButtonRelease:
  case QEvent::MouseButtonDblClick:
  case QEvent::MouseMove:
  case QEvent::KeyPress:
  case QEvent::KeyRelease:
  case QEvent::Destroy:
  case QEvent::Close:
  case QEvent::Quit:
    while (o->parent())
      o = o->parent();
    if (o == this)
      return QWidget::eventFilter(o,e);
    else
      return true;
    break;
  default:
    return QWidget::eventFilter(o,e);
  }
}

void KJSDebugWin::disableOtherWindows()
{
  QWidgetList *widgets = QApplication::allWidgets();
  QWidgetListIt it(*widgets);
  for (; it.current(); ++it)
    it.current()->installEventFilter(this);
}

void KJSDebugWin::enableOtherWindows()
{
  QWidgetList *widgets = QApplication::allWidgets();
  QWidgetListIt it(*widgets);
  for (; it.current(); ++it)
    it.current()->removeEventFilter(this);
}

bool KJSDebugWin::sourceParsed(KJS::ExecState *exec, int sourceId,
                               const KJS::UString &source, int errorLine)
{
  // Work out which source file this fragment is in
  SourceFile *sourceFile = 0;
  if (!m_nextSourceUrl.isEmpty())
    sourceFile = getSourceFile(exec->interpreter(),m_nextSourceUrl);

  int index;
  if (!sourceFile) {
    index = m_sourceSel->count();
    if (!m_nextSourceUrl.isEmpty()) {

      QString code = source.qstring();
      KParts::ReadOnlyPart *part = static_cast<ScriptInterpreter*>(exec->interpreter())->part();
      if (m_nextSourceUrl == part->url().url()) {
	// Only store the code here if it's not from the part's html page... in that
	// case we can get it from KHTMLPageCache
	code = QString::null;
      }

      sourceFile = new SourceFile(m_nextSourceUrl,code,exec->interpreter());
      setSourceFile(exec->interpreter(),m_nextSourceUrl,sourceFile);
      m_sourceSelFiles.append(sourceFile);
      m_sourceSel->insertItem(m_nextSourceUrl);
    }
    else {
      // Sourced passed from somewhere else (possibly an eval call)... we don't know the url,
      // but we still know the interpreter
      sourceFile = new SourceFile("(unknown)",source.qstring(),exec->interpreter());
      m_sourceSelFiles.append(sourceFile);
      m_sourceSel->insertItem("???");
    }
  }
  else {
    for (index = 0; index < m_sourceSel->count(); index++) {
      if (m_sourceSelFiles.at(index) == sourceFile)
	break;
    }
    assert(index < m_sourceSel->count());
  }

  SourceFragment *sf = new SourceFragment(sourceId,m_nextSourceBaseLine,errorLine,sourceFile);
  m_sourceFragments[sourceId] = sf;

  if (m_sourceSel->currentItem() < 0)
    m_sourceSel->setCurrentItem(index);

  if (m_sourceSel->currentItem() == index) {
    displaySourceFile(sourceFile,true);
  }

  m_nextSourceBaseLine = 1;
  m_nextSourceUrl = "";