fix webpreview for urls with url-encoded chars
[quassel.git] / src / qtui / chatscene.cpp
index e21d625..86a461b 100644 (file)
@@ -1,5 +1,5 @@
 /***************************************************************************
- *   Copyright (C) 2005-08 by the Quassel Project                          *
+ *   Copyright (C) 2005-09 by the Quassel Project                          *
  *   devel@quassel-irc.org                                                 *
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
 
 #include <QApplication>
 #include <QClipboard>
+#include <QDrag>
 #include <QGraphicsSceneMouseEvent>
+#include <QMenu>
 #include <QPersistentModelIndex>
-#include <QWebView>
+
+#ifdef HAVE_WEBKIT
+#  include <QWebView>
+#endif
 
 #include "chatitem.h"
 #include "chatline.h"
 #include "chatlinemodelitem.h"
 #include "chatscene.h"
+#include "chatview.h"
 #include "client.h"
 #include "clientbacklogmanager.h"
 #include "columnhandleitem.h"
+#include "contextmenuactionprovider.h"
+#include "iconloader.h"
 #include "messagefilter.h"
 #include "qtui.h"
 #include "qtuistyle.h"
 
 const qreal minContentsWidth = 200;
 
-ChatScene::ChatScene(QAbstractItemModel *model, const QString &idString, qreal width, QObject *parent)
-  : QGraphicsScene(0, 0, width, 0, parent),
+ChatScene::ChatScene(QAbstractItemModel *model, const QString &idString, qreal width, ChatView *parent)
+  : QGraphicsScene(0, 0, width, 0, (QObject *)parent),
+    _chatView(parent),
     _idString(idString),
     _model(model),
-    _singleBufferScene(false),
+    _singleBufferId(BufferId()),
     _sceneRect(0, 0, width, 0),
     _firstLineRow(-1),
     _viewportHeight(0),
     _cutoffMode(CutoffRight),
     _selectingItem(0),
     _selectionStart(-1),
-    _isSelecting(false)
+    _isSelecting(false),
+    _clickMode(NoClick),
+    _clickHandled(true),
+    _leftButtonPressed(false)
 {
   MessageFilter *filter = qobject_cast<MessageFilter*>(model);
-  if(filter) {
-    _singleBufferScene = filter->isSingleBufferFilter();
+  if(filter && filter->isSingleBufferFilter()) {
+    _singleBufferId = filter->singleBufferId();
   }
 
   ChatViewSettings defaultSettings;
@@ -80,21 +92,25 @@ ChatScene::ChatScene(QAbstractItemModel *model, const QString &idString, qreal w
 
   setHandleXLimits();
 
-  connect(model, SIGNAL(rowsInserted(const QModelIndex &, int, int)),
-         this, SLOT(rowsInserted(const QModelIndex &, int, int)));
-  connect(model, SIGNAL(rowsAboutToBeRemoved(const QModelIndex &, int, int)),
-         this, SLOT(rowsAboutToBeRemoved(const QModelIndex &, int, int)));
-
   if(model->rowCount() > 0)
     rowsInserted(QModelIndex(), 0, model->rowCount() - 1);
 
+  connect(model, SIGNAL(rowsInserted(const QModelIndex &, int, int)),
+          this, SLOT(rowsInserted(const QModelIndex &, int, int)));
+  connect(model, SIGNAL(rowsAboutToBeRemoved(const QModelIndex &, int, int)),
+          this, SLOT(rowsAboutToBeRemoved(const QModelIndex &, int, int)));
+  connect(model, SIGNAL(dataChanged(QModelIndex, QModelIndex)), SLOT(dataChanged(QModelIndex, QModelIndex)));
+
 #ifdef HAVE_WEBKIT
-  webPreview.delayTimer.setSingleShot(true);
-  connect(&webPreview.delayTimer, SIGNAL(timeout()), this, SLOT(showWebPreviewEvent()));
-  //webPreview.deleteTimer.setInterval(600000);
-  webPreview.deleteTimer.setInterval(10000);
-  connect(&webPreview.deleteTimer, SIGNAL(timeout()), this, SLOT(deleteWebPreviewEvent()));
+  webPreview.timer.setSingleShot(true);
+  connect(&webPreview.timer, SIGNAL(timeout()), this, SLOT(webPreviewNextStep()));
 #endif
+  _showWebPreview = defaultSettings.showWebPreview();
+  defaultSettings.notify("ShowWebPreview", this, SLOT(showWebPreviewChanged()));
+
+  _clickTimer.setInterval(QApplication::doubleClickInterval());
+  _clickTimer.setSingleShot(true);
+  connect(&_clickTimer, SIGNAL(timeout()), SLOT(clickTimeout()));
 
   setItemIndexMethod(QGraphicsScene::NoIndex);
 }
@@ -102,6 +118,31 @@ ChatScene::ChatScene(QAbstractItemModel *model, const QString &idString, qreal w
 ChatScene::~ChatScene() {
 }
 
+ChatView *ChatScene::chatView() const {
+  return _chatView;
+}
+
+ColumnHandleItem *ChatScene::firstColumnHandle() const {
+  return _firstColHandle;
+}
+
+ColumnHandleItem *ChatScene::secondColumnHandle() const {
+  return _secondColHandle;
+}
+
+ChatItem *ChatScene::chatItemAt(const QPointF &scenePos) const {
+  QGraphicsItem *item = itemAt(scenePos);
+  return dynamic_cast<ChatItem *>(item);
+}
+
+bool ChatScene::containsBuffer(const BufferId &id) const {
+  MessageFilter *filter = qobject_cast<MessageFilter*>(model());
+  if(filter)
+    return filter->containsBuffer(id);
+  else
+    return false;
+}
+
 void ChatScene::rowsInserted(const QModelIndex &index, int start, int end) {
   Q_UNUSED(index);
 
@@ -146,9 +187,9 @@ void ChatScene::rowsInserted(const QModelIndex &index, int start, int end) {
   if(atTop) {
     for(int i = end; i >= start; i--) {
       ChatLine *line = new ChatLine(i, model(),
-                                   width,
-                                   timestampWidth, senderWidth, contentsWidth,
-                                   senderPos, contentsPos);
+                                    width,
+                                    timestampWidth, senderWidth, contentsWidth,
+                                    senderPos, contentsPos);
       h += line->height();
       line->setPos(0, y-h);
       _lines.insert(start, line);
@@ -157,9 +198,9 @@ void ChatScene::rowsInserted(const QModelIndex &index, int start, int end) {
   } else {
     for(int i = start; i <= end; i++) {
       ChatLine *line = new ChatLine(i, model(),
-                                   width,
-                                   timestampWidth, senderWidth, contentsWidth,
-                                   senderPos, contentsPos);
+                                    width,
+                                    timestampWidth, senderWidth, contentsWidth,
+                                    senderPos, contentsPos);
       line->setPos(0, y+h);
       h += line->height();
       _lines.insert(i, line);
@@ -237,7 +278,7 @@ void ChatScene::rowsInserted(const QModelIndex &index, int start, int end) {
     if(start < _firstLineRow) {
       int prevFirstLineRow = _firstLineRow + (end - start + 1);
       for(int i = end + 1; i < prevFirstLineRow; i++) {
-       _lines.at(i)->show();
+        _lines.at(i)->show();
       }
     }
     // force new search for first proper line
@@ -340,6 +381,10 @@ void ChatScene::rowsAboutToBeRemoved(const QModelIndex &parent, int start, int e
   updateSceneRect();
 }
 
+void ChatScene::dataChanged(const QModelIndex &tl, const QModelIndex &br) {
+  layout(tl.row(), br.row(), _sceneRect.width());
+}
+
 void ChatScene::updateForViewport(qreal width, qreal height) {
   _viewportHeight = height;
   setWidth(width);
@@ -348,21 +393,37 @@ void ChatScene::updateForViewport(qreal width, qreal height) {
 void ChatScene::setWidth(qreal width) {
   if(width == _sceneRect.width())
     return;
+  layout(0, _lines.count()-1, width);
+}
 
+void ChatScene::layout(int start, int end, qreal width) {
   // clock_t startT = clock();
 
   // disabling the index while doing this complex updates is about
   // 2 to 10 times faster!
   //setItemIndexMethod(QGraphicsScene::NoIndex);
 
-  QList<ChatLine *>::iterator lineIter = _lines.end();
-  QList<ChatLine *>::iterator lineIterBegin = _lines.begin();
-  qreal linePos = _sceneRect.y() + _sceneRect.height();
-  qreal contentsWidth = width - secondColumnHandle()->sceneRight();
-  while(lineIter != lineIterBegin) {
-    lineIter--;
-    (*lineIter)->setGeometryByWidth(width, contentsWidth, linePos);
+  if(end >= 0) {
+    int row = end;
+    qreal linePos = _lines.at(row)->scenePos().y() + _lines.at(row)->height();
+    qreal contentsWidth = width - secondColumnHandle()->sceneRight();
+    while(row >= start) {
+      _lines.at(row--)->setGeometryByWidth(width, contentsWidth, linePos);
+    }
+
+    if(row >= 0) {
+      // remaining items don't need geometry changes, but maybe repositioning?
+      ChatLine *line = _lines.at(row);
+      qreal offset = linePos - (line->scenePos().y() + line->height());
+      if(offset != 0) {
+        while(row >= 0) {
+          line = _lines.at(row--);
+          line->setPos(0, line->scenePos().y() + offset);
+        }
+      }
+    }
   }
+
   //setItemIndexMethod(QGraphicsScene::BspTreeIndex);
 
   updateSceneRect(width);
@@ -377,7 +438,7 @@ void ChatScene::firstHandlePositionChanged(qreal xpos) {
   if(_firstColHandlePos == xpos)
     return;
 
-  _firstColHandlePos = xpos;
+  _firstColHandlePos = xpos >= 0 ? xpos : 0;
   ChatViewSettings viewSettings(this);
   viewSettings.setValue("FirstColumnHandlePos", _firstColHandlePos);
   ChatViewSettings defaultSettings;
@@ -462,17 +523,9 @@ void ChatScene::startGlobalSelection(ChatItem *item, const QPointF &itemPos) {
 }
 
 void ChatScene::updateSelection(const QPointF &pos) {
-  // This is somewhat hacky... we look at the contents item that is at the cursor's y position (ignoring x), since
-  // it has the full height. From this item, we can then determine the row index and hence the ChatLine.
-  ChatItem *contentItem = static_cast<ChatItem *>(itemAt(QPointF(_secondColHandle->sceneRight() + 1, pos.y())));
-  if(!contentItem) return;
-
-  int curRow = contentItem->row();
-  int curColumn;
-  if(pos.x() > _secondColHandle->sceneRight()) curColumn = ChatLineModel::ContentsColumn;
-  else if(pos.x() > _firstColHandlePos) curColumn = ChatLineModel::SenderColumn;
-  else curColumn = ChatLineModel::TimestampColumn;
-
+  int curRow = rowByScenePos(pos);
+  if(curRow < 0) return;
+  int curColumn = (int)columnByScenePos(pos);
   ChatLineModel::ColumnType minColumn = (ChatLineModel::ColumnType)qMin(curColumn, _selectionStartCol);
   if(minColumn != _selectionMinCol) {
     _selectionMinCol = minColumn;
@@ -509,73 +562,248 @@ void ChatScene::updateSelection(const QPointF &pos) {
     }
     _lines[curRow]->setSelected(false);
     _isSelecting = false;
+    _selectionStart = -1;
     _selectingItem->continueSelecting(_selectingItem->mapFromScene(pos));
   }
 }
 
-void ChatScene::mouseMoveEvent(QGraphicsSceneMouseEvent *event) {
-  if(_isSelecting && event->buttons() == Qt::LeftButton) {
-    updateSelection(event->scenePos());
-    event->accept();
+bool ChatScene::isPosOverSelection(const QPointF &pos) const {
+  ChatItem *chatItem = chatItemAt(pos);
+  if(!chatItem)
+    return false;
+  if(hasGlobalSelection()) {
+    int row = chatItem->row();
+    if(row >= qMin(_selectionStart, _selectionEnd) && row <= qMax(_selectionStart, _selectionEnd))
+      return columnByScenePos(pos) >= _selectionMinCol;
   } else {
-    QGraphicsScene::mouseMoveEvent(event);
+    return chatItem->isPosOverSelection(chatItem->mapFromScene(pos));
   }
+  return false;
+}
+
+bool ChatScene::isScrollingAllowed() const {
+  if(_isSelecting)
+    return false;
+
+  // TODO: Handle clicks and single-item selections too
+
+  return true;
+}
+
+/******** MOUSE HANDLING **************************************************************************/
+
+void ChatScene::contextMenuEvent(QGraphicsSceneContextMenuEvent *event) {
+  QPointF pos = event->scenePos();
+  QMenu menu;
+
+  // zoom actions and similar
+  chatView()->addActionsToMenu(&menu, pos);
+  menu.addSeparator();
+
+  if(isPosOverSelection(pos))
+    menu.addAction(SmallIcon("edit-copy"), tr("Copy Selection"),
+                    this, SLOT(selectionToClipboard()),
+                    QKeySequence::Copy);
+
+  // item-specific options (select link etc)
+  ChatItem *item = chatItemAt(pos);
+  if(item)
+    item->addActionsToMenu(&menu, item->mapFromScene(pos));
+  else
+    // no item -> default scene actions
+    GraphicalUi::contextMenuActionProvider()->addActions(&menu, filter(), BufferId());
+
+  menu.exec(event->screenPos());
+
+}
+
+void ChatScene::mouseMoveEvent(QGraphicsSceneMouseEvent *event) {
+  if(event->buttons() == Qt::LeftButton) {
+    if(!_clickHandled && (event->scenePos() - _clickPos).toPoint().manhattanLength() >= QApplication::startDragDistance()) {
+      if(_clickTimer.isActive())
+        _clickTimer.stop();
+      if(_clickMode == SingleClick && isPosOverSelection(_clickPos))
+        initiateDrag(event->widget());
+      else {
+        _clickMode = DragStartClick;
+        handleClick(Qt::LeftButton, _clickPos);
+      }
+      _clickMode = NoClick;
+    }
+    if(_isSelecting) {
+      updateSelection(event->scenePos());
+      emit mouseMoveWhileSelecting(event->scenePos());
+      event->accept();
+    } else if(_clickHandled && _clickMode < DoubleClick)
+      QGraphicsScene::mouseMoveEvent(event);
+  } else
+    QGraphicsScene::mouseMoveEvent(event);
 }
 
 void ChatScene::mousePressEvent(QGraphicsSceneMouseEvent *event) {
-  if(_selectionStart >= 0 && event->buttons() == Qt::LeftButton) {
-    for(int l = qMin(_selectionStart, _selectionEnd); l <= qMax(_selectionStart, _selectionEnd); l++) {
-      _lines[l]->setSelected(false);
+  if(event->buttons() == Qt::LeftButton) {
+    _leftButtonPressed = true;
+    _clickHandled = false;
+    if(!isPosOverSelection(event->scenePos())) {
+      // immediately clear selection if clicked outside; otherwise, wait for potential drag
+      clearSelection();
     }
-    _isSelecting = false;
-    _selectionStart = -1;
-    QGraphicsScene::mousePressEvent(event);  // so we can start a new local selection
-  } else {
-    QGraphicsScene::mousePressEvent(event);
+    if(_clickMode != NoClick && _clickTimer.isActive()) {
+      switch(_clickMode) {
+        case NoClick: _clickMode = SingleClick; break;
+        case SingleClick: _clickMode = DoubleClick; break;
+        case DoubleClick: _clickMode = TripleClick; break;
+        case TripleClick: _clickMode = DoubleClick; break;
+        case DragStartClick: break;
+      }
+      handleClick(Qt::LeftButton, _clickPos);
+    } else {
+      _clickMode = SingleClick;
+      _clickPos = event->scenePos();
+    }
+    _clickTimer.start();
   }
+  if(event->type() == QEvent::GraphicsSceneMouseDoubleClick)
+    QGraphicsScene::mouseDoubleClickEvent(event);
+  else
+    QGraphicsScene::mousePressEvent(event);
+}
+
+void ChatScene::mouseDoubleClickEvent(QGraphicsSceneMouseEvent *event) {
+  // we check for doubleclick ourselves, so just call press handler
+  mousePressEvent(event);
 }
 
 void ChatScene::mouseReleaseEvent(QGraphicsSceneMouseEvent *event) {
-  if(_isSelecting && !event->buttons() & Qt::LeftButton) {
-    putToClipboard(selectionToString());
-    _isSelecting = false;
-    event->accept();
-  } else {
-    QGraphicsScene::mouseReleaseEvent(event);
+  if(event->button() == Qt::LeftButton && _leftButtonPressed) {
+    _leftButtonPressed = false;
+    if(_clickMode != NoClick) {
+      if(_clickMode == SingleClick)
+        clearSelection();
+      event->accept();
+      if(!_clickTimer.isActive())
+        handleClick(Qt::LeftButton, _clickPos);
+    } else {
+      // no click -> drag or selection move
+      if(isGloballySelecting()) {
+        selectionToClipboard(QClipboard::Selection);
+        _isSelecting = false;
+        event->accept();
+        return;
+      }
+    }
+  }
+  QGraphicsScene::mouseReleaseEvent(event);
+}
+
+void ChatScene::clickTimeout() {
+  if(!_leftButtonPressed && _clickMode == SingleClick)
+    handleClick(Qt::LeftButton, _clickPos);
+}
+
+void ChatScene::handleClick(Qt::MouseButton button, const QPointF &scenePos) {
+  if(button == Qt::LeftButton) {
+    clearSelection();
+
+    // Now send click down to items
+    ChatItem *chatItem = chatItemAt(scenePos);
+    if(chatItem) {
+      chatItem->handleClick(chatItem->mapFromScene(scenePos), _clickMode);
+    }
+    _clickHandled = true;
   }
 }
 
-void ChatScene::putToClipboard(const QString &selection) {
-  // TODO Configure clipboards
-#   ifdef Q_WS_X11
-  QApplication::clipboard()->setText(selection, QClipboard::Selection);
-#   endif
-//# else
-  QApplication::clipboard()->setText(selection);
-//# endif
+void ChatScene::initiateDrag(QWidget *source) {
+  QDrag *drag = new QDrag(source);
+  QMimeData *mimeData = new QMimeData;
+  mimeData->setText(selection());
+  drag->setMimeData(mimeData);
+
+  drag->exec(Qt::CopyAction);
+}
+
+/******** SELECTIONS ******************************************************************************/
+
+void ChatScene::selectionToClipboard(QClipboard::Mode mode) {
+  if(!hasSelection())
+    return;
+
+  stringToClipboard(selection(), mode);
+}
+
+void ChatScene::stringToClipboard(const QString &str_, QClipboard::Mode mode) {
+  QString str = str_;
+  // remove trailing linefeeds
+  if(str.endsWith('\n'))
+    str.chop(1);
+
+  switch(mode) {
+    case QClipboard::Clipboard:
+      QApplication::clipboard()->setText(str);
+      break;
+    case QClipboard::Selection:
+      if(QApplication::clipboard()->supportsSelection())
+        QApplication::clipboard()->setText(str, QClipboard::Selection);
+      break;
+    default:
+      break;
+  };
 }
 
 //!\brief Convert current selection to human-readable string.
-QString ChatScene::selectionToString() const {
+QString ChatScene::selection() const {
   //TODO Make selection format configurable!
-  if(!_isSelecting) return QString();
-  int start = qMin(_selectionStart, _selectionEnd);
-  int end = qMax(_selectionStart, _selectionEnd);
-  if(start < 0 || end >= _lines.count()) {
-    qDebug() << "Invalid selection range:" << start << end;
-    return QString();
-  }
-  QString result;
-  for(int l = start; l <= end; l++) {
-    if(_selectionMinCol == ChatLineModel::TimestampColumn)
-      result += _lines[l]->item(ChatLineModel::TimestampColumn).data(MessageModel::DisplayRole).toString() + " ";
-    if(_selectionMinCol <= ChatLineModel::SenderColumn)
-      result += _lines[l]->item(ChatLineModel::SenderColumn).data(MessageModel::DisplayRole).toString() + " ";
-    result += _lines[l]->item(ChatLineModel::ContentsColumn).data(MessageModel::DisplayRole).toString() + "\n";
+  if(hasGlobalSelection()) {
+    int start = qMin(_selectionStart, _selectionEnd);
+    int end = qMax(_selectionStart, _selectionEnd);
+    if(start < 0 || end >= _lines.count()) {
+      qDebug() << "Invalid selection range:" << start << end;
+      return QString();
+    }
+    QString result;
+    for(int l = start; l <= end; l++) {
+      if(_selectionMinCol == ChatLineModel::TimestampColumn)
+        result += _lines[l]->item(ChatLineModel::TimestampColumn).data(MessageModel::DisplayRole).toString() + " ";
+      if(_selectionMinCol <= ChatLineModel::SenderColumn)
+        result += _lines[l]->item(ChatLineModel::SenderColumn).data(MessageModel::DisplayRole).toString() + " ";
+      result += _lines[l]->item(ChatLineModel::ContentsColumn).data(MessageModel::DisplayRole).toString() + "\n";
+    }
+    return result;
+  } else if(selectingItem())
+    return selectingItem()->selection();
+  return QString();
+}
+
+bool ChatScene::hasSelection() const {
+  return hasGlobalSelection() || (selectingItem() && selectingItem()->hasSelection());
+}
+
+bool ChatScene::hasGlobalSelection() const {
+  return _selectionStart >= 0;
+}
+
+bool ChatScene::isGloballySelecting() const {
+  return _isSelecting;
+}
+
+void ChatScene::clearGlobalSelection() {
+  if(hasGlobalSelection()) {
+    for(int l = qMin(_selectionStart, _selectionEnd); l <= qMax(_selectionStart, _selectionEnd); l++)
+      _lines[l]->setSelected(false);
+    _isSelecting = false;
+    _selectionStart = -1;
   }
-  return result;
 }
 
+void ChatScene::clearSelection() {
+  clearGlobalSelection();
+  if(selectingItem())
+    selectingItem()->clearSelection();
+}
+
+/******** *************************************************************************************/
+
 void ChatScene::requestBacklog() {
   MessageFilter *filter = qobject_cast<MessageFilter*>(model());
   if(filter)
@@ -583,7 +811,7 @@ void ChatScene::requestBacklog() {
   return;
 }
 
-int ChatScene::sectionByScenePos(int x) {
+ChatLineModel::ColumnType ChatScene::columnByScenePos(qreal x) const {
   if(x < _firstColHandle->x())
     return ChatLineModel::TimestampColumn;
   if(x < _secondColHandle->x())
@@ -592,6 +820,15 @@ int ChatScene::sectionByScenePos(int x) {
   return ChatLineModel::ContentsColumn;
 }
 
+int ChatScene::rowByScenePos(qreal y) const {
+  // This is somewhat hacky... we look at the contents item that is at the given y position, since
+  // it has the full height. From this item, we can then determine the row index and hence the ChatLine.
+  // ChatItems cover their ChatLine, so we won't get to the latter directly.
+  ChatItem *contentItem = static_cast<ChatItem *>(itemAt(QPointF(_secondColHandle->sceneRight() + 1, y)));
+  if(!contentItem) return -1;
+  return contentItem->row();
+}
+
 void ChatScene::updateSceneRect(qreal width) {
   if(_lines.isEmpty()) {
     updateSceneRect(QRectF(0, 0, width, 0));
@@ -610,7 +847,7 @@ void ChatScene::updateSceneRect(qreal width) {
     while(_firstLineRow < numRows) {
       firstLineIdx = model()->index(_firstLineRow, 0);
       if((Message::Type)(model()->data(firstLineIdx, MessageModel::TypeRole).toInt()) != Message::DayChange)
-       break;
+        break;
       _lines.at(_firstLineRow)->hide();
       _firstLineRow++;
     }
@@ -641,74 +878,132 @@ bool ChatScene::event(QEvent *e) {
   return QGraphicsScene::event(e);
 }
 
-void ChatScene::loadWebPreview(ChatItem *parentItem, const QString &url, const QRectF &urlRect) {
-#ifndef HAVE_WEBKIT
-  Q_UNUSED(parentItem)
-  Q_UNUSED(url)
-  Q_UNUSED(urlRect)
-#else
+// ========================================
+//  Webkit Only stuff
+// ========================================
+#ifdef HAVE_WEBKIT
+void ChatScene::loadWebPreview(ChatItem *parentItem, const QUrl &url, const QRectF &urlRect) {
+  if(!_showWebPreview)
+    return;
+
+  if(webPreview.urlRect != urlRect)
+    webPreview.urlRect = urlRect;
+
   if(webPreview.parentItem != parentItem)
     webPreview.parentItem = parentItem;
 
   if(webPreview.url != url) {
     webPreview.url = url;
-    // load a new web view and delete the old one (if exists)
-    if(webPreview.previewItem && webPreview.previewItem->scene()) {
-      removeItem(webPreview.previewItem);
+    // prepare to load a different URL
+    if(webPreview.previewItem) {
+      if(webPreview.previewItem->scene())
+       removeItem(webPreview.previewItem);
       delete webPreview.previewItem;
+      webPreview.previewItem = 0;
     }
-    webPreview.previewItem = new WebPreviewItem(url);
-    webPreview.delayTimer.start(2000);
-    webPreview.deleteTimer.stop();
-  } else if(webPreview.previewItem && !webPreview.previewItem->scene()) {
-      // we just have to readd the item to the scene
-      webPreview.delayTimer.start(2000);
-      webPreview.deleteTimer.stop();
-  }
-  if(webPreview.urlRect != urlRect) {
-    webPreview.urlRect = urlRect;
-    qreal previewY = urlRect.bottom();
-    qreal previewX = urlRect.x();
-    if(previewY + webPreview.previewItem->boundingRect().height() > sceneRect().bottom())
-      previewY = urlRect.y() - webPreview.previewItem->boundingRect().height();
+    webPreview.previewState = WebPreview::NoPreview;
+  }
 
-    if(previewX + webPreview.previewItem->boundingRect().width() > sceneRect().width())
-      previewX = sceneRect().right() - webPreview.previewItem->boundingRect().width();
+  if(webPreview.url.isEmpty())
+    return;
 
-    webPreview.previewItem->setPos(previewX, previewY);
-  }
-#endif
+  // qDebug() << Q_FUNC_INFO << webPreview.previewState;
+  switch(webPreview.previewState) {
+  case WebPreview::NoPreview:
+    webPreview.previewState = WebPreview::NewPreview;
+    webPreview.timer.start(500);
+    break;
+  case WebPreview::NewPreview:
+  case WebPreview::DelayPreview:
+  case WebPreview::ShowPreview:
+    // we're already waiting for the next step or showing the preview
+    break;
+  case WebPreview::HidePreview:
+    // we still have a valid preview
+    webPreview.previewState = WebPreview::DelayPreview;
+    webPreview.timer.start(1000);
+    break;
+  }
+  // qDebug() << "  new State:" << webPreview.previewState << webPreview.timer.isActive();
 }
 
-void ChatScene::showWebPreviewEvent() {
-#ifdef HAVE_WEBKIT
-  if(webPreview.previewItem)
+void ChatScene::webPreviewNextStep() {
+  // qDebug() << Q_FUNC_INFO << webPreview.previewState;
+  switch(webPreview.previewState) {
+  case WebPreview::NoPreview:
+    break;
+  case WebPreview::NewPreview:
+    Q_ASSERT(!webPreview.previewItem);
+    webPreview.previewItem = new WebPreviewItem(webPreview.url);
+    webPreview.previewState = WebPreview::DelayPreview;
+    webPreview.timer.start(1000);
+    break;
+  case WebPreview::DelayPreview:
+    Q_ASSERT(webPreview.previewItem);
+    // calc position and show
+    {
+      qreal previewY = webPreview.urlRect.bottom();
+      qreal previewX = webPreview.urlRect.x();
+      if(previewY + webPreview.previewItem->boundingRect().height() > sceneRect().bottom())
+       previewY = webPreview.urlRect.y() - webPreview.previewItem->boundingRect().height();
+
+      if(previewX + webPreview.previewItem->boundingRect().width() > sceneRect().width())
+       previewX = sceneRect().right() - webPreview.previewItem->boundingRect().width();
+
+      webPreview.previewItem->setPos(previewX, previewY);
+    }
     addItem(webPreview.previewItem);
-#endif
-}
-
-void ChatScene::clearWebPreview(ChatItem *parentItem) {
-#ifndef HAVE_WEBKIT
-  Q_UNUSED(parentItem)
-#else
-  if(parentItem == 0 || webPreview.parentItem == parentItem) {
-    if(webPreview.previewItem && webPreview.previewItem->scene()) {
+    webPreview.previewState = WebPreview::ShowPreview;
+    break;
+  case WebPreview::ShowPreview:
+    qWarning() << "ChatScene::webPreviewNextStep() called while in ShowPreview Step!";
+    qWarning() << "removing preview";
+    if(webPreview.previewItem && webPreview.previewItem->scene())
       removeItem(webPreview.previewItem);
-      webPreview.deleteTimer.start();
+    // Fall through to deletion!
+  case WebPreview::HidePreview:
+    if(webPreview.previewItem) {
+      delete webPreview.previewItem;
+      webPreview.previewItem = 0;
     }
-    webPreview.delayTimer.stop();
+    webPreview.parentItem = 0;
+    webPreview.url = QUrl();
+    webPreview.urlRect = QRectF();
+    webPreview.previewState = WebPreview::NoPreview;
   }
-#endif
+  // qDebug() << "  new State:" << webPreview.previewState << webPreview.timer.isActive();
 }
 
-void ChatScene::deleteWebPreviewEvent() {
-#ifdef HAVE_WEBKIT
-  if(webPreview.previewItem) {
-    delete webPreview.previewItem;
-    webPreview.previewItem = 0;
-  }
-  webPreview.parentItem = 0;
-  webPreview.url = QString();
-  webPreview.urlRect = QRectF();
+void ChatScene::clearWebPreview(ChatItem *parentItem) {
+  // qDebug() << Q_FUNC_INFO << webPreview.previewState;
+  switch(webPreview.previewState) {
+  case WebPreview::NewPreview:
+    webPreview.previewState = WebPreview::NoPreview; // we haven't loaded anything yet
+    break;
+  case WebPreview::ShowPreview:
+    if(parentItem == 0 || webPreview.parentItem == parentItem) {
+      if(webPreview.previewItem && webPreview.previewItem->scene())
+       removeItem(webPreview.previewItem);
+    }
+    // fall through into to set hidden state
+  case WebPreview::DelayPreview:
+    // we're just loading, so haven't shown the preview yet.
+    webPreview.previewState = WebPreview::HidePreview;
+    webPreview.timer.start(5000);
+    break;
+  case WebPreview::NoPreview:
+  case WebPreview::HidePreview:
+    break;
+  }
+  // qDebug() << "  new State:" << webPreview.previewState << webPreview.timer.isActive();
+}
 #endif
+
+// ========================================
+//  end of webkit only
+// ========================================
+
+void ChatScene::showWebPreviewChanged() {
+  ChatViewSettings settings;
+  _showWebPreview = settings.showWebPreview();
 }