/**********************************************************************
** Copyright (C) 2000 Trolltech AS.  All rights reserved.
**
** This file is part of Qt Designer.
**
** This file may be distributed and/or modified under the terms of the
** GNU General Public License version 2 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file.
**
** Licensees holding valid Qt Enterprise Edition or Qt Professional Edition
** licenses may use this file in accordance with the Qt Commercial License
** Agreement provided with the Software.
**
** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
**
** See http://www.trolltech.com/gpl/ for GPL licensing information.
** See http://www.trolltech.com/pricing.html or email sales@trolltech.com for
**   information about Qt Commercial License Agreements.
**
** Contact info@trolltech.com if any conditions of this licensing are
** not clear to you.
**
**********************************************************************/

#include "viewmanager.h"
#include "editor.h"
#include "markerwidget.h"
#include <qlayout.h>
#include <private/qrichtext_p.h>
#include "paragdata.h"
#include <qobjectlist.h>
#include <qlabel.h>
#include <qtimer.h>

ViewManager::ViewManager(QWidget *parent, const char *name)
  : QWidget(parent, name), curView(0)
{
  QHBoxLayout *l = new QHBoxLayout(this);
  markerWidget = new MarkerWidget(this, "editor_markerwidget");
  connect(markerWidget, SIGNAL(markersChanged()),
          this, SIGNAL(markersChanged()));
  connect(markerWidget, SIGNAL(collapseFunction(QTextParagraph *)),
          this, SIGNAL(collapseFunction(QTextParagraph *)));
  connect(markerWidget, SIGNAL(expandFunction(QTextParagraph *)),
          this, SIGNAL(expandFunction(QTextParagraph *)));
  connect(markerWidget, SIGNAL(collapse(bool)),
          this, SIGNAL(collapse(bool)));
  connect(markerWidget, SIGNAL(expand(bool)),
          this, SIGNAL(expand(bool)));
  connect(markerWidget, SIGNAL(editBreakPoints()),
          this, SIGNAL(editBreakPoints()));
  connect(markerWidget, SIGNAL(isBreakpointPossible(bool &, const QString &, int)),
          this, SIGNAL(isBreakpointPossible(bool &, const QString &, int)));
  connect(markerWidget, SIGNAL(showMessage(const QString &)),
          this, SLOT(showMessage(const QString &)));
  messageTimer = new QTimer(this);
  connect(messageTimer, SIGNAL(timeout()), this, SLOT(clearStatusBar()));
  markerWidget->setFixedWidth(fontMetrics().width(QString::fromLatin1("0000")) + 20);
  l->addWidget(markerWidget);
  layout = new QVBoxLayout(l);
}

void ViewManager::addView(QWidget *view)
{
  layout->addWidget(view);
  curView = view;
  connect(((Editor *)curView)->verticalScrollBar(), SIGNAL(valueChanged(int)),
          markerWidget, SLOT(doRepaint()));
  connect((Editor *)curView, SIGNAL(textChanged()),
          markerWidget, SLOT(doRepaint()));
  connect((Editor *)curView, SIGNAL(clearErrorMarker()),
          this, SLOT(clearErrorMarker()));
  posLabel = new QLabel(this, "editor_poslabel");
  posLabel->setAlignment(Qt::AlignVCenter | Qt::AlignRight);
  posLabel->setText(QString::fromLatin1(" Line: 1 Col: 1"));
  posLabel->setFrameStyle(QFrame::Sunken | QFrame::Panel);
  posLabel->setLineWidth(1);
  posLabel->setFixedHeight(posLabel->fontMetrics().height());
  layout->addWidget(posLabel);
  connect(curView, SIGNAL(cursorPositionChanged(int, int)),
          this, SLOT(cursorPositionChanged(int, int)));
}

QWidget *ViewManager::currentView() const
{
  return curView;
}

void ViewManager::childEvent(QChildEvent *e)
{
  if (e->type() == QEvent::ChildInserted &&
#if (QT_VERSION) < 0x030200
      e->child()->inherits("Editor")
#else
      ::qt_cast<Editor *>(e->child())
#endif
     )
    addView((QWidget *)e->child());
  QWidget::childEvent(e);
}

void ViewManager::setError(int line)
{
  QTextParagraph *p = ((Editor *)curView)->document()->paragAt(line);
  if (p) {
    ((Editor *)curView)->setErrorSelection(line);
    ((Editor *)curView)->setCursorPosition(line, 0);
    ((Editor *)curView)->viewport()->setFocus();
    ((Editor *)curView)->makeFunctionVisible(p);
    ParagData *paragData = (ParagData *)p->extraData();
    if (!paragData)
      paragData = new ParagData;
    paragData->marker = ParagData::Error;
    p->setExtraData(paragData);
    markerWidget->doRepaint();
  }
}

void ViewManager::setStep(int line)
{
  QTextParagraph *p = ((Editor *)curView)->document()->firstParagraph();
  while (p) {
    if (p->extraData())
      ((ParagData *)p->extraData())->step = FALSE;
    p = p->next();
  }
  p = ((Editor *)curView)->document()->paragAt(line);
  if (p) {
    ((Editor *)curView)->setStepSelection(line);
    ((Editor *)curView)->setCursorPosition(line, 0);
    ((Editor *)curView)->viewport()->setFocus();
    ((Editor *)curView)->makeFunctionVisible(p);
    ParagData *paragData = (ParagData *)p->extraData();
    if (!paragData)
      paragData = new ParagData;
    paragData->step = TRUE;
    p->setExtraData(paragData);
    markerWidget->doRepaint();
  }
}

void ViewManager::clearStep()
{
  ((Editor *)curView)->clearStepSelection();
  QTextParagraph *p = ((Editor *)curView)->document()->firstParagraph();
  while (p) {
    if (p->extraData())
      ((ParagData *)p->extraData())->step = FALSE;
    p = p->next();
  }
  markerWidget->doRepaint();
}

void ViewManager::setStackFrame(int line)
{
  QTextParagraph *p = ((Editor *)curView)->document()->paragAt(line);
  if (p) {
    ((Editor *)curView)->sync();
    ((Editor *)curView)->setCursorPosition(line, 0);
    ((Editor *)curView)->ensureCursorVisible();
    ((Editor *)curView)->viewport()->setFocus();
    ((Editor *)curView)->makeFunctionVisible(p);
    ParagData *paragData = (ParagData *)p->extraData();
    if (!paragData)
      paragData = new ParagData;
    paragData->stackFrame = TRUE;
    p->setExtraData(paragData);
    markerWidget->doRepaint();
  }
}

void ViewManager::clearStackFrame()
{
  QTextParagraph *p = ((Editor *)curView)->document()->firstParagraph();
  while (p) {
    if (p->extraData()) {
      ((ParagData *)p->extraData())->stackFrame = FALSE;
      if (((ParagData *)p->extraData())->marker == ParagData::Error)
        ((ParagData *)p->extraData())->marker = ParagData::NoMarker;
    }
    p = p->next();
  }
  markerWidget->doRepaint();
}

void ViewManager::resizeEvent(QResizeEvent *e)
{
  QWidget::resizeEvent(e);
  markerWidget->doRepaint();
}

void ViewManager::clearErrorMarker()
{
  QTextParagraph *p = ((Editor *)curView)->document()->firstParagraph();
  while (p) {
    if (p->extraData())
      ((ParagData *)p->extraData())->marker = ParagData::NoMarker;
    p = p->next();
  }
  markerWidget->doRepaint();
}

void ViewManager::setBreakPoints(const QValueList<uint> &l)
{
  QTextParagraph *p = ((Editor *)curView)->document()->firstParagraph();
  int i = 0;
  while (p) {
    if (l.find(i) != l.end()) {
      if (!p->extraData()) {
        ParagData *data = new ParagData;
        p->setExtraData(data);
      }
      ParagData *data = (ParagData *)p->extraData();
      data->marker = ParagData::Breakpoint;
    } else if (p->extraData()) {
      ParagData *data = (ParagData *)p->extraData();
      data->marker = ParagData::NoMarker;
    }
    p = p->next();
    ++i;
  }
  markerWidget->doRepaint();
}

QValueList<uint> ViewManager::breakPoints() const
{
  QValueList<uint> l;
  int i = 0;
  QTextParagraph *p = ((Editor *)curView)->document()->firstParagraph();
  while (p) {
    if (p->extraData() &&
        ((ParagData *)p->extraData())->marker == ParagData::Breakpoint)
      l << i;
    p = p->next();
    ++i;
  }
  return l;
}

void ViewManager::showMarkerWidget(bool b)
{
  if (b)
    markerWidget->show();
  else
    markerWidget->hide();
}

void ViewManager::emitMarkersChanged()
{
  emit markersChanged();
}

void ViewManager::cursorPositionChanged(int row, int col)
{
  posLabel->setText(QString(" Line: %1 Col: %2").arg(row + 1).arg(col + 1));
}

void ViewManager::showMessage(const QString &msg)
{
  int row;
  int col;
  ((QTextEdit *)currentView())->getCursorPosition(&row, &col);
  posLabel->setText(msg);
  messageTimer->start(1000, TRUE);
}

void ViewManager::clearStatusBar()
{
  int row;
  int col;
  ((QTextEdit *)currentView())->getCursorPosition(&row, &col);
  posLabel->setText(QString(" Line: %1 Col: %2").arg(row + 1).arg(col + 1));
}