X-Git-Url: https://git.quassel-irc.org/?a=blobdiff_plain;f=src%2Fqtui%2Fchatitem.cpp;h=9fadc127a7612c84590af3ae377f142167a70f0e;hb=00e1a9c29e792ba4d65dba21b7ba04131bcb13bc;hp=b5fb62ae204012bd93d0486543048799b3654290;hpb=6aaf227185e89aacd23ff25e3d5ff5030ace3093;p=quassel.git

diff --git a/src/qtui/chatitem.cpp b/src/qtui/chatitem.cpp
index b5fb62ae..9fadc127 100644
--- a/src/qtui/chatitem.cpp
+++ b/src/qtui/chatitem.cpp
@@ -1,5 +1,5 @@
 /***************************************************************************
- *   Copyright (C) 2005-08 by the Quassel Project                          *
+ *   Copyright (C) 2005-2018 by the Quassel Project                        *
  *   devel@quassel-irc.org                                                 *
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
@@ -15,169 +15,995 @@
  *   You should have received a copy of the GNU General Public License     *
  *   along with this program; if not, write to the                         *
  *   Free Software Foundation, Inc.,                                       *
- *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
+ *   51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.         *
  ***************************************************************************/
 
+#include "chatitem.h"
+
+#include <algorithm>
+#include <iterator>
+
+#include <QApplication>
+#include <QClipboard>
+#include <QDesktopServices>
 #include <QFontMetrics>
 #include <QGraphicsSceneMouseEvent>
 #include <QPainter>
+#include <QPalette>
 #include <QTextLayout>
+#include <QMenu>
 
-#include "chatitem.h"
+#include "buffermodel.h"
+#include "bufferview.h"
+#include "chatline.h"
 #include "chatlinemodel.h"
+#include "chatview.h"
+#include "contextmenuactionprovider.h"
+#include "icon.h"
+#include "mainwin.h"
 #include "qtui.h"
+#include "qtuistyle.h"
+
+ChatItem::ChatItem(const QRectF &boundingRect, ChatLine *parent)
+    : _parent(parent),
+    _boundingRect(boundingRect),
+    _selectionMode(NoSelection),
+    _selectionStart(-1),
+    _cachedLayout(0)
+{
+}
+
+
+ChatItem::~ChatItem()
+{
+    delete _cachedLayout;
+}
+
+
+ChatLine *ChatItem::chatLine() const
+{
+    return _parent;
+}
+
+
+ChatScene *ChatItem::chatScene() const
+{
+    return chatLine()->chatScene();
+}
+
+
+ChatView *ChatItem::chatView() const
+{
+    return chatScene()->chatView();
+}
+
 
-ChatItem::ChatItem(const QPersistentModelIndex &index_, QGraphicsItem *parent) : QGraphicsItem(parent), _index(index_) {
-  _fontMetrics = QtUi::style()->fontMetrics(data(ChatLineModel::FormatRole).value<UiStyle::FormatList>().at(0).second);
-  _layout = 0;
-  _lines = 0;
+const QAbstractItemModel *ChatItem::model() const
+{
+    return chatLine()->model();
 }
 
-ChatItem::~ChatItem() {
-  delete _layout;
+
+int ChatItem::row() const
+{
+    return chatLine()->row();
 }
 
-QVariant ChatItem::data(int role) const {
-  if(!_index.isValid()) {
-    qWarning() << "ChatItem::data(): Model index is invalid!" << _index;
-    return QVariant();
-  }
-  return _index.data(role);
+
+QPointF ChatItem::mapToLine(const QPointF &p) const
+{
+    return p + pos();
+}
+
+
+QPointF ChatItem::mapFromLine(const QPointF &p) const
+{
+    return p - pos();
 }
 
-int ChatItem::setWidth(int w) {
-  w -= 10;
-  if(w == _boundingRect.width()) return _boundingRect.height();
-  _boundingRect.setWidth(w);
-  int h = heightForWidth(w);
-  _boundingRect.setHeight(h);
-  if(haveLayout()) updateLayout();
-  return h;
+
+// relative to the ChatLine
+QPointF ChatItem::mapToScene(const QPointF &p) const
+{
+    return chatLine()->mapToScene(p /* + pos() */);
 }
 
-int ChatItem::heightForWidth(int width) {
-  if(data(ChatLineModel::ColumnTypeRole).toUInt() != ChatLineModel::ContentsColumn)
-    return fontMetrics()->lineSpacing(); // only contents can be multi-line
 
-  _lines = 1;
-  WrapColumnFinder finder(this);
-  while(finder.nextWrapColumn() > 0) _lines++;
-  return _lines * fontMetrics()->lineSpacing();
+QPointF ChatItem::mapFromScene(const QPointF &p) const
+{
+    return chatLine()->mapFromScene(p) /* - pos() */;
 }
 
-ChatItem::WrapColumnFinder::WrapColumnFinder(ChatItem *_item) : item(_item) {
-  wrapList = item->data(ChatLineModel::WrapListRole).value<ChatLineModel::WrapList>();
-  wordidx = 0;
-  layout = 0;
-  lastwrapcol = 0;
-  lastwrappos = 0;
-  w = 0;
+
+QVariant ChatItem::data(int role) const
+{
+    QModelIndex index = model()->index(row(), column());
+    if (!index.isValid()) {
+        qWarning() << "ChatItem::data(): model index is invalid!" << index;
+        return QVariant();
+    }
+    return model()->data(index, role);
 }
 
-ChatItem::WrapColumnFinder::~WrapColumnFinder() {
-  delete layout;
+
+QTextLayout *ChatItem::layout() const
+{
+    if (_cachedLayout)
+        return _cachedLayout;
+
+    _cachedLayout = new QTextLayout;
+    initLayout(_cachedLayout);
+    chatView()->setHasCache(chatLine());
+    return _cachedLayout;
+}
+
+
+void ChatItem::clearCache()
+{
+    delete _cachedLayout;
+    _cachedLayout = 0;
+}
+
+
+void ChatItem::initLayoutHelper(QTextLayout *layout, QTextOption::WrapMode wrapMode, Qt::Alignment alignment) const
+{
+    Q_ASSERT(layout);
+
+    layout->setText(data(MessageModel::DisplayRole).toString());
+
+    QTextOption option;
+    option.setWrapMode(wrapMode);
+    option.setAlignment(alignment);
+    layout->setTextOption(option);
+
+    QList<QTextLayout::FormatRange> formatRanges
+        = QtUi::style()->toTextLayoutList(formatList(), layout->text().length(), data(ChatLineModel::MsgLabelRole).value<UiStyle::MessageLabel>());
+    layout->setAdditionalFormats(formatRanges);
 }
 
-int ChatItem::WrapColumnFinder::nextWrapColumn() {
-  while(wordidx < wrapList.count()) {
-    w += wrapList.at(wordidx).width;
-    if(w >= item->width()) {
-      if(lastwrapcol >= wrapList.at(wordidx).start) {
-        // first word, and it doesn't fit
-        if(!line.isValid()) {
-          layout = item->createLayout(QTextOption::NoWrap);
-          layout->beginLayout();
-          line = layout->createLine();
-          line.setLineWidth(item->width());
-          layout->endLayout();
+
+void ChatItem::initLayout(QTextLayout *layout) const
+{
+    initLayoutHelper(layout, QTextOption::NoWrap);
+    doLayout(layout);
+}
+
+
+void ChatItem::doLayout(QTextLayout *layout) const
+{
+    layout->beginLayout();
+    QTextLine line = layout->createLine();
+    if (line.isValid()) {
+        line.setLineWidth(width());
+        line.setPosition(QPointF(0, 0));
+    }
+    layout->endLayout();
+}
+
+
+UiStyle::FormatList ChatItem::formatList() const
+{
+    return data(MessageModel::FormatRole).value<UiStyle::FormatList>();
+}
+
+
+qint16 ChatItem::posToCursor(const QPointF &posInLine) const
+{
+    QPointF pos = mapFromLine(posInLine);
+    if (pos.y() > height())
+        return data(MessageModel::DisplayRole).toString().length();
+    if (pos.y() < 0)
+        return 0;
+
+    for (int l = layout()->lineCount() - 1; l >= 0; l--) {
+        QTextLine line = layout()->lineAt(l);
+        if (pos.y() >= line.y()) {
+            return line.xToCursor(pos.x(), QTextLine::CursorOnCharacter);
+        }
+    }
+    return 0;
+}
+
+
+void ChatItem::paintBackground(QPainter *painter)
+{
+    QVariant bgBrush;
+    if (_selectionMode == FullSelection)
+        bgBrush = data(ChatLineModel::SelectedBackgroundRole);
+    else
+        bgBrush = data(ChatLineModel::BackgroundRole);
+    if (bgBrush.isValid())
+        painter->fillRect(boundingRect(), bgBrush.value<QBrush>());
+}
+
+
+// NOTE: This is not the most time-efficient implementation, but it saves space by not caching unnecessary data
+//       This is a deliberate trade-off. (-> selectFmt creation, data() call)
+void ChatItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget)
+{
+    Q_UNUSED(option); Q_UNUSED(widget);
+    painter->save();
+    painter->setClipRect(boundingRect());
+    paintBackground(painter);
+
+    layout()->draw(painter, pos(), additionalFormats(), boundingRect());
+
+    //  layout()->draw(painter, QPointF(0,0), formats, boundingRect());
+
+    // Debuging Stuff
+    // uncomment partially or all of the following stuff:
+    //
+    // 0) alternativ painter color for debug stuff
+//   if(row() % 2)
+//     painter->setPen(Qt::red);
+//   else
+//     painter->setPen(Qt::blue);
+// 1) draw wordwrap points in the first line
+//   if(column() == 2) {
+//     ChatLineModel::WrapList wrapList = data(ChatLineModel::WrapListRole).value<ChatLineModel::WrapList>();
+//     foreach(ChatLineModel::Word word, wrapList) {
+//       if(word.endX > width())
+//      break;
+//       painter->drawLine(word.endX, 0, word.endX, height());
+//     }
+//   }
+// 2) draw MsgId over the time column
+//   if(column() == 0) {
+//     QString msgIdString = QString::number(data(MessageModel::MsgIdRole).value<MsgId>().toLongLong());
+//     QPointF bottomPoint = boundingRect().bottomLeft();
+//     bottomPoint.ry() -= 2;
+//     painter->drawText(bottomPoint, msgIdString);
+//   }
+// 3) draw bounding rect
+//   painter->drawRect(_boundingRect.adjusted(0, 0, -1, -1));
+
+    painter->restore();
+}
+
+
+void ChatItem::overlayFormat(UiStyle::FormatList &fmtList, quint16 start, quint16 end, UiStyle::FormatType overlayFmt) const
+{
+    for (size_t i = 0; i < fmtList.size(); i++) {
+        int fmtStart = fmtList.at(i).first;
+        int fmtEnd = (i < fmtList.size()-1 ? fmtList.at(i+1).first : data(MessageModel::DisplayRole).toString().length());
+
+        if (fmtEnd <= start)
+            continue;
+        if (fmtStart >= end)
+            break;
+
+        // split the format if necessary
+        if (fmtStart < start) {
+            fmtList.insert(fmtList.begin() + i, fmtList.at(i));
+            fmtList[++i].first = start;
+        }
+        if (end < fmtEnd) {
+            fmtList.insert(fmtList.begin() + i, fmtList.at(i));
+            fmtList[i+1].first = end;
+        }
+
+        fmtList[i].second.type |= overlayFmt;
+    }
+}
+
+
+QVector<QTextLayout::FormatRange> ChatItem::additionalFormats() const
+{
+    // Calculate formats to overlay (only) if there's a selection, and/or a hovered clickable
+    if (!hasSelection() && !hasActiveClickable()) {
+        return {};
+    }
+
+    using Label = UiStyle::MessageLabel;
+    using Format = UiStyle::Format;
+
+    Label itemLabel = data(ChatLineModel::MsgLabelRole).value<Label>();
+    const auto &fmtList = formatList();
+
+    struct LabelFormat {
+        quint16 offset;
+        Format format;
+        Label label;
+    };
+
+    // Transform formatList() into an extended list of LabelFormats
+    std::vector<LabelFormat> labelFmtList;
+    std::transform(fmtList.cbegin(), fmtList.cend(), std::back_inserter(labelFmtList), [itemLabel](const std::pair<quint16, Format> &f) {
+        return LabelFormat{f.first, f.second, itemLabel};
+    });
+    // Append dummy element to avoid special-casing handling the last real format
+    labelFmtList.push_back(LabelFormat{quint16(data(MessageModel::DisplayRole).toString().length()), Format(), itemLabel});
+
+    // Apply the given label to the given range in the format list, splitting formats as necessary
+    auto applyLabel = [&labelFmtList](quint16 start, quint16 end, Label label) {
+        size_t i = 0;
+
+        // Skip unaffected formats
+        for (; i < labelFmtList.size() - 1; ++i) {
+            if (labelFmtList[i+1].offset > start)
+                break;
+        }
+        // Range start doesn't align; split affected format and let the index point to the newly inserted copy
+        if (labelFmtList[i].offset < start) {
+            labelFmtList.insert(labelFmtList.begin() + i, labelFmtList[i]);
+            labelFmtList[++i].offset = start;
         }
-        int idx = line.xToCursor(lastwrappos + item->width());
+
+        // Apply label to formats fully affected
+        for (; i < labelFmtList.size() - 1; ++i) {
+            if (labelFmtList[i+1].offset <= end) {
+                labelFmtList[i].label |= label;
+                continue;
+            }
+            // Last affected format, split if end of range doesn't align
+            if (labelFmtList[i+1].offset > end) {
+                labelFmtList.insert(labelFmtList.begin() + i, labelFmtList[i]);
+                labelFmtList[i].label |= label;
+                labelFmtList[i+1].offset = end;
+            }
+            break;
+        }
+    };
+
+    // Apply selection label
+    if (hasSelection()) {
+        quint16 start, end;
+        if (_selectionMode == FullSelection) {
+            start = 0;
+            end = data(MessageModel::DisplayRole).toString().length();
+        }
+        else {
+            start = qMin(_selectionStart, _selectionEnd);
+            end = qMax(_selectionStart, _selectionEnd);
+        }
+        applyLabel(start, end, Label::Selected);
+    }
+
+    // Apply hovered label
+    if (hasActiveClickable()) {
+        applyLabel(activeClickableRange().first, activeClickableRange().second, Label::Hovered);
+    }
+
+    // Add all formats that have an extra label to the additionalFormats list
+    QList<QTextLayout::FormatRange> additionalFormats;
+    for (size_t i = 0; i < labelFmtList.size() - 1; ++i) {
+        if (labelFmtList[i].label != itemLabel) {
+            additionalFormats << QtUi::style()->toTextLayoutList({std::make_pair(labelFmtList[i].offset, labelFmtList[i].format)},
+                                                                 labelFmtList[i+1].offset,
+                                                                 labelFmtList[i].label);
+        }
+    }
+
+    return additionalFormats.toVector();
+}
+
+
+bool ChatItem::hasSelection() const
+{
+    if (_selectionMode == NoSelection)
+        return false;
+    if (_selectionMode == FullSelection)
+        return true;
+    // partial
+    return _selectionStart != _selectionEnd;
+}
+
+
+QString ChatItem::selection() const
+{
+    if (_selectionMode == FullSelection)
+        return data(MessageModel::DisplayRole).toString();
+    if (_selectionMode == PartialSelection)
+        return data(MessageModel::DisplayRole).toString().mid(qMin(_selectionStart, _selectionEnd), qAbs(_selectionStart - _selectionEnd));
+    return QString();
+}
+
+
+void ChatItem::setSelection(SelectionMode mode, qint16 start, qint16 end)
+{
+    _selectionMode = mode;
+    _selectionStart = start;
+    _selectionEnd = end;
+    chatLine()->update();
+}
+
+
+void ChatItem::setFullSelection()
+{
+    if (_selectionMode != FullSelection) {
+        _selectionMode = FullSelection;
+        chatLine()->update();
+    }
+}
+
+
+void ChatItem::clearSelection()
+{
+    if (_selectionMode != NoSelection) {
+        _selectionMode = NoSelection;
+        chatLine()->update();
+    }
+}
+
+
+void ChatItem::continueSelecting(const QPointF &pos)
+{
+    _selectionMode = PartialSelection;
+    _selectionEnd = posToCursor(pos);
+    chatLine()->update();
+}
+
+
+bool ChatItem::isPosOverSelection(const QPointF &pos) const
+{
+    if (_selectionMode == FullSelection)
+        return true;
+    if (_selectionMode == PartialSelection) {
+        int cursor = posToCursor(pos);
+        return cursor >= qMin(_selectionStart, _selectionEnd) && cursor <= qMax(_selectionStart, _selectionEnd);
+    }
+    return false;
+}
+
+
+bool ChatItem::hasActiveClickable() const
+{
+    return false;
+}
+
+
+std::pair<quint16, quint16> ChatItem::activeClickableRange() const
+{
+    return {};
+}
+
+
+QList<QRectF> ChatItem::findWords(const QString &searchWord, Qt::CaseSensitivity caseSensitive)
+{
+    QList<QRectF> resultList;
+    const QAbstractItemModel *model_ = model();
+    if (!model_)
+        return resultList;
+
+    QString plainText = model_->data(model_->index(row(), column()), MessageModel::DisplayRole).toString();
+    QList<int> indexList;
+    int searchIdx = plainText.indexOf(searchWord, 0, caseSensitive);
+    while (searchIdx != -1) {
+        indexList << searchIdx;
+        searchIdx = plainText.indexOf(searchWord, searchIdx + 1, caseSensitive);
+    }
+
+    foreach(int idx, indexList) {
+        QTextLine line = layout()->lineForTextPosition(idx);
         qreal x = line.cursorToX(idx);
-        w = w - wrapList.at(wordidx).width - (x - lastwrappos);
-        lastwrappos = x;
-        lastwrapcol = idx;
-        return idx;
-      }
-      // not the first word, so just wrap before this
-      lastwrapcol = wrapList.at(wordidx).start;
-      lastwrappos = lastwrappos + w - wrapList.at(wordidx).width;
-      w = 0;
-      return lastwrapcol;
-    }
-    w += wrapList.at(wordidx).trailing;
-    wordidx++;
-  }
-  return -1;
-}
-
-QTextLayout *ChatItem::createLayout(QTextOption::WrapMode wrapMode) {
-  QTextLayout *layout = new QTextLayout(data(MessageModel::DisplayRole).toString());
-
-  QTextOption option;
-  option.setWrapMode(wrapMode);
-  layout->setTextOption(option);
-
-  QList<QTextLayout::FormatRange> formatRanges
-         = QtUi::style()->toTextLayoutList(data(MessageModel::FormatRole).value<UiStyle::FormatList>(), layout->text().length());
-  layout->setAdditionalFormats(formatRanges);
-  return layout;
-}
-
-void ChatItem::updateLayout() {
-  if(!haveLayout()) _layout = createLayout(QTextOption::WrapAnywhere);
-
-  // Now layout
-  ChatLineModel::WrapList wrapList = data(ChatLineModel::WrapListRole).value<ChatLineModel::WrapList>();
-  if(!wrapList.count()) return; // empty chatitem
-  int wordidx = 0;
-  ChatLineModel::Word word = wrapList.at(0);
-
-  qreal h = 0;
-  WrapColumnFinder finder(this);
-  _layout->beginLayout();
-  forever {
-    QTextLine line = _layout->createLine();
-    if (!line.isValid())
-      break;
-
-    int col = finder.nextWrapColumn();
-    line.setNumColumns(col >= 0 ? col - line.textStart() : _layout->text().length());
-
-    h += fontMetrics()->leading();
-    line.setPosition(QPointF(0, h));
-    h += line.height();
-  }
-  _layout->endLayout();
-}
-
-void ChatItem::clearLayout() {
-  delete _layout;
-  _layout = 0;
-}
-
-//int ChatItem::findNextWrapColumn(
-
-void ChatItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget) {
-  Q_UNUSED(option); Q_UNUSED(widget);
-  if(!haveLayout()) updateLayout();
-  _layout->draw(painter, QPointF(0,0), QVector<QTextLayout::FormatRange>(), boundingRect());
-  painter->drawRect(boundingRect());
-  int width = 0;
-  QVariantList wrapList = data(ChatLineModel::WrapListRole).toList();
-  for(int i = 2; i < wrapList.count(); i+=2) {
-    QRect r(wrapList[i-1].toUInt(), 0, wrapList[i+1].toUInt() - wrapList[i-1].toUInt(), fontMetrics()->lineSpacing());
-    painter->drawRect(r);
-  }
-}
-
-/*
-void ChatItem::mouseMoveEvent ( QGraphicsSceneMouseEvent * event ) {
-  qDebug() << (void*)this << "moving" << event->pos();
-  if(event->pos().y() < 0) {
-    QTextCursor cursor(document());
-    //cursor.insertText("foo");
-    //cursor.select(QTextCursor::Document);
-    event->ignore();
-  } else QGraphicsTextItem::mouseMoveEvent(event);
-}
-*/
+        qreal width = line.cursorToX(idx + searchWord.count()) - x;
+        qreal height = line.height();
+        qreal y = height * line.lineNumber();
+        resultList << QRectF(x, y, width, height);
+    }
+
+    return resultList;
+}
+
+
+void ChatItem::handleClick(const QPointF &pos, ChatScene::ClickMode clickMode)
+{
+    // single clicks are already handled by the scene (for clearing the selection)
+    if (clickMode == ChatScene::DragStartClick) {
+        chatScene()->setSelectingItem(this);
+        _selectionStart = _selectionEnd = posToCursor(pos);
+        _selectionMode = NoSelection; // will be set to PartialSelection by mouseMoveEvent
+        chatLine()->update();
+    }
+}
+
+
+void ChatItem::mouseMoveEvent(QGraphicsSceneMouseEvent *event)
+{
+    if (event->buttons() == Qt::LeftButton) {
+        if (boundingRect().contains(event->pos())) {
+            qint16 end = posToCursor(event->pos());
+            if (end != _selectionEnd) {
+                _selectionEnd = end;
+                _selectionMode = (_selectionStart != _selectionEnd ? PartialSelection : NoSelection);
+                chatLine()->update();
+            }
+        }
+        else {
+            setFullSelection();
+            chatScene()->startGlobalSelection(this, event->pos());
+        }
+        event->accept();
+    }
+    else {
+        event->ignore();
+    }
+}
+
+
+void ChatItem::mousePressEvent(QGraphicsSceneMouseEvent *event)
+{
+    if (event->buttons() == Qt::LeftButton)
+        event->accept();
+    else
+        event->ignore();
+}
+
+
+void ChatItem::mouseReleaseEvent(QGraphicsSceneMouseEvent *event)
+{
+    if (_selectionMode != NoSelection && event->button() == Qt::LeftButton) {
+        chatScene()->selectionToClipboard(QClipboard::Selection);
+        event->accept();
+    }
+    else
+        event->ignore();
+}
+
+
+void ChatItem::addActionsToMenu(QMenu *menu, const QPointF &pos)
+{
+    Q_UNUSED(pos);
+
+    GraphicalUi::contextMenuActionProvider()->addActions(menu, chatScene()->filter(), data(MessageModel::BufferIdRole).value<BufferId>());
+}
+
+
+// ************************************************************
+// SenderChatItem
+// ************************************************************
+
+void SenderChatItem::initLayout(QTextLayout *layout) const
+{
+    initLayoutHelper(layout, QTextOption::ManualWrap, Qt::AlignRight);
+    doLayout(layout);
+}
+
+
+void SenderChatItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget)
+{
+    Q_UNUSED(option); Q_UNUSED(widget);
+    painter->save();
+    painter->setClipRect(boundingRect());
+    paintBackground(painter);
+
+    qreal layoutWidth = layout()->minimumWidth();
+    qreal offset = 0;
+    if (chatScene()->senderCutoffMode() == ChatScene::CutoffLeft)
+        offset = qMin(width() - layoutWidth, (qreal)0);
+    else
+        offset = qMax(layoutWidth - width(), (qreal)0);
+
+    if (layoutWidth > width()) {
+        // Draw a nice gradient for longer items
+        // Qt's text drawing with a gradient brush sucks, so we use compositing instead
+        QPixmap pixmap(layout()->boundingRect().toRect().size());
+        pixmap.fill(Qt::transparent);
+
+        QPainter pixPainter(&pixmap);
+        layout()->draw(&pixPainter, QPointF(qMax(offset, (qreal)0), 0), additionalFormats());
+
+        // Create alpha channel mask
+        QLinearGradient gradient;
+        if (offset < 0) {
+            gradient.setStart(0, 0);
+            gradient.setFinalStop(12, 0);
+            gradient.setColorAt(0, Qt::transparent);
+            gradient.setColorAt(1, Qt::white);
+        }
+        else {
+            gradient.setStart(width()-10, 0);
+            gradient.setFinalStop(width(), 0);
+            gradient.setColorAt(0, Qt::white);
+            gradient.setColorAt(1, Qt::transparent);
+        }
+        pixPainter.setCompositionMode(QPainter::CompositionMode_DestinationIn); // gradient's alpha gets applied to the pixmap
+        pixPainter.fillRect(pixmap.rect(), gradient);
+        painter->drawPixmap(pos(), pixmap);
+    }
+    else {
+        layout()->draw(painter, pos(), additionalFormats(), boundingRect());
+    }
+    painter->restore();
+}
+
+
+void SenderChatItem::handleClick(const QPointF &pos, ChatScene::ClickMode clickMode)
+{
+    if (clickMode == ChatScene::DoubleClick) {
+        BufferInfo curBufInfo = Client::networkModel()->bufferInfo(data(MessageModel::BufferIdRole).value<BufferId>());
+        QString nick = data(MessageModel::EditRole).toString();
+        // check if the nick is a valid ircUser
+        if (!nick.isEmpty() && Client::network(curBufInfo.networkId())->ircUser(nick))
+            Client::bufferModel()->switchToOrStartQuery(curBufInfo.networkId(), nick);
+    }
+    else
+        ChatItem::handleClick(pos, clickMode);
+}
+
+
+// ************************************************************
+// ContentsChatItem
+// ************************************************************
+
+ContentsChatItem::ActionProxy ContentsChatItem::_actionProxy;
+
+ContentsChatItem::ContentsChatItem(const QPointF &pos, const qreal &width, ChatLine *parent)
+    : ChatItem(QRectF(pos, QSizeF(width, 0)), parent),
+    _data(0)
+{
+    setPos(pos);
+    setGeometryByWidth(width);
+}
+
+
+QFontMetricsF *ContentsChatItem::fontMetrics() const
+{
+    return QtUi::style()->fontMetrics(data(ChatLineModel::FormatRole).value<UiStyle::FormatList>().at(0).second.type, UiStyle::MessageLabel::None);
+}
+
+
+ContentsChatItem::~ContentsChatItem()
+{
+    delete _data;
+}
+
+
+void ContentsChatItem::clearCache()
+{
+    delete _data;
+    _data = 0;
+    ChatItem::clearCache();
+}
+
+
+ContentsChatItemPrivate *ContentsChatItem::privateData() const
+{
+    if (!_data) {
+        ContentsChatItem *that = const_cast<ContentsChatItem *>(this);
+        that->_data = new ContentsChatItemPrivate(ClickableList::fromString(data(ChatLineModel::DisplayRole).toString()), that);
+    }
+    return _data;
+}
+
+
+qreal ContentsChatItem::setGeometryByWidth(qreal w)
+{
+    // We use this for reloading layout info as well, so we can't bail out if the width doesn't change
+
+    // compute height
+    int lines = 1;
+    WrapColumnFinder finder(this);
+    while (finder.nextWrapColumn(w) > 0)
+        lines++;
+    qreal spacing = qMax(fontMetrics()->lineSpacing(), fontMetrics()->height()); // cope with negative leading()
+    qreal h = lines * spacing;
+    delete _data;
+    _data = 0;
+
+    if (w != width() || h != height())
+        setGeometry(w, h);
+
+    return h;
+}
+
+
+void ContentsChatItem::initLayout(QTextLayout *layout) const
+{
+    initLayoutHelper(layout, QTextOption::WrapAtWordBoundaryOrAnywhere);
+    doLayout(layout);
+}
+
+
+void ContentsChatItem::doLayout(QTextLayout *layout) const
+{
+    ChatLineModel::WrapList wrapList = data(ChatLineModel::WrapListRole).value<ChatLineModel::WrapList>();
+    if (!wrapList.count()) return;  // empty chatitem
+
+    qreal h = 0;
+    qreal spacing = qMax(fontMetrics()->lineSpacing(), fontMetrics()->height()); // cope with negative leading()
+    WrapColumnFinder finder(this);
+    layout->beginLayout();
+    forever {
+        QTextLine line = layout->createLine();
+        if (!line.isValid())
+            break;
+
+        int col = finder.nextWrapColumn(width());
+        if (col < 0)
+            col = layout->text().length();
+        int num = col - line.textStart();
+
+        line.setNumColumns(num);
+
+        // Sometimes, setNumColumns will create a line that's too long (cf. Qt bug 238249)
+        // We verify this and try setting the width again, making it shorter each time until the lengths match.
+        // Dead fugly, but seems to work…
+        for (int i = line.textLength()-1; i >= 0 && line.textLength() > num; i--) {
+            line.setNumColumns(i);
+        }
+        if (num != line.textLength()) {
+            qWarning() << "WARNING: Layout engine couldn't workaround Qt bug 238249, please report!";
+            // qDebug() << num << line.textLength() << t.mid(line.textStart(), line.textLength()) << t.mid(line.textStart() + line.textLength());
+        }
+
+        line.setPosition(QPointF(0, h));
+        h += spacing;
+    }
+    layout->endLayout();
+}
+
+
+bool ContentsChatItem::hasActiveClickable() const
+{
+    return privateData()->currentClickable.isValid();
+}
+
+
+std::pair<quint16, quint16> ContentsChatItem::activeClickableRange() const
+{
+    const auto &clickable = privateData()->currentClickable;
+    if (clickable.isValid()) {
+        return {clickable.start(), clickable.start() + clickable.length()};
+    }
+    return {};
+}
+
+
+Clickable ContentsChatItem::clickableAt(const QPointF &pos) const
+{
+    return privateData()->clickables.atCursorPos(posToCursor(pos));
+}
+
+
+UiStyle::FormatList ContentsChatItem::formatList() const
+{
+    UiStyle::FormatList fmtList = ChatItem::formatList();
+    for (int i = 0; i < privateData()->clickables.count(); i++) {
+        Clickable click = privateData()->clickables.at(i);
+        if (click.type() == Clickable::Url) {
+            overlayFormat(fmtList, click.start(), click.start() + click.length(), UiStyle::FormatType::Url);
+        }
+    }
+    return fmtList;
+}
+
+
+void ContentsChatItem::endHoverMode()
+{
+    if (privateData()) {
+        if (privateData()->currentClickable.isValid()) {
+            chatLine()->unsetCursor();
+            privateData()->currentClickable = Clickable();
+        }
+        clearWebPreview();
+        chatLine()->update();
+    }
+}
+
+
+void ContentsChatItem::handleClick(const QPointF &pos, ChatScene::ClickMode clickMode)
+{
+    if (clickMode == ChatScene::SingleClick) {
+        qint16 idx = posToCursor(pos);
+        Clickable foo = privateData()->clickables.atCursorPos(idx);
+        if (foo.isValid()) {
+            NetworkId networkId = Client::networkModel()->networkId(data(MessageModel::BufferIdRole).value<BufferId>());
+            QString text = data(ChatLineModel::DisplayRole).toString();
+            foo.activate(networkId, text);
+        }
+    }
+    else if (clickMode == ChatScene::DoubleClick) {
+        chatScene()->setSelectingItem(this);
+        setSelectionMode(PartialSelection);
+        Clickable click = clickableAt(pos);
+        if (click.isValid()) {
+            setSelectionStart(click.start());
+            setSelectionEnd(click.start() + click.length());
+        }
+        else {
+            // find word boundary
+            QString str = data(ChatLineModel::DisplayRole).toString();
+            qint16 cursor = posToCursor(pos);
+            qint16 start = str.lastIndexOf(QRegExp("\\W"), cursor) + 1;
+            qint16 end = qMin(str.indexOf(QRegExp("\\W"), cursor), str.length());
+            if (end < 0) end = str.length();
+            setSelectionStart(start);
+            setSelectionEnd(end);
+        }
+        chatLine()->update();
+    }
+    else if (clickMode == ChatScene::TripleClick) {
+        setSelection(PartialSelection, 0, data(ChatLineModel::DisplayRole).toString().length());
+    }
+    ChatItem::handleClick(pos, clickMode);
+}
+
+
+void ContentsChatItem::mouseMoveEvent(QGraphicsSceneMouseEvent *event)
+{
+    // mouse move events always mean we're not hovering anymore...
+    endHoverMode();
+    ChatItem::mouseMoveEvent(event);
+}
+
+
+void ContentsChatItem::hoverLeaveEvent(QGraphicsSceneHoverEvent *event)
+{
+    endHoverMode();
+    event->accept();
+}
+
+
+void ContentsChatItem::hoverMoveEvent(QGraphicsSceneHoverEvent *event)
+{
+    bool onClickable = false;
+    Clickable click = clickableAt(event->pos());
+    if (click.isValid()) {
+        if (click.type() == Clickable::Url) {
+            onClickable = true;
+            showWebPreview(click);
+        }
+        else if (click.type() == Clickable::Channel) {
+            QString name = data(ChatLineModel::DisplayRole).toString().mid(click.start(), click.length());
+            // don't make clickable if it's our own name
+            BufferId myId = data(MessageModel::BufferIdRole).value<BufferId>();
+            if (Client::networkModel()->bufferName(myId) != name)
+                onClickable = true;
+        }
+        if (onClickable) {
+            chatLine()->setCursor(Qt::PointingHandCursor);
+            privateData()->currentClickable = click;
+            chatLine()->update();
+            return;
+        }
+    }
+    if (!onClickable) endHoverMode();
+    event->accept();
+}
+
+
+void ContentsChatItem::addActionsToMenu(QMenu *menu, const QPointF &pos)
+{
+    if (privateData()->currentClickable.isValid()) {
+        Clickable click = privateData()->currentClickable;
+        switch (click.type()) {
+        case Clickable::Url:
+            privateData()->activeClickable = click;
+            menu->addAction(icon::get("edit-copy"), tr("Copy Link Address"),
+                &_actionProxy, SLOT(copyLinkToClipboard()))->setData(QVariant::fromValue<void *>(this));
+            break;
+        case Clickable::Channel:
+        {
+            // Remove existing menu actions, they confuse us when right-clicking on a clickable
+            menu->clear();
+            QString name = data(ChatLineModel::DisplayRole).toString().mid(click.start(), click.length());
+            GraphicalUi::contextMenuActionProvider()->addActions(menu, chatScene()->filter(), data(MessageModel::BufferIdRole).value<BufferId>(), name);
+            break;
+        }
+        default:
+            break;
+        }
+    }
+    else {
+        // Buffer-specific actions
+        ChatItem::addActionsToMenu(menu, pos);
+    }
+}
+
+
+void ContentsChatItem::copyLinkToClipboard()
+{
+    Clickable click = privateData()->activeClickable;
+    if (click.isValid() && click.type() == Clickable::Url) {
+        QString url = data(ChatLineModel::DisplayRole).toString().mid(click.start(), click.length());
+        if (!url.contains("://"))
+            url = "http://" + url;
+        chatScene()->stringToClipboard(url);
+    }
+}
+
+
+/******** WEB PREVIEW *****************************************************************************/
+
+void ContentsChatItem::showWebPreview(const Clickable &click)
+{
+#if !defined HAVE_WEBKIT && !defined HAVE_WEBENGINE
+    Q_UNUSED(click);
+#else
+    QTextLine line = layout()->lineForTextPosition(click.start());
+    qreal x = line.cursorToX(click.start());
+    qreal width = line.cursorToX(click.start() + click.length()) - x;
+    qreal height = line.height();
+    qreal y = height * line.lineNumber();
+
+    QPointF topLeft = mapToScene(pos()) + QPointF(x, y);
+    QRectF urlRect = QRectF(topLeft.x(), topLeft.y(), width, height);
+
+    QString urlstr = data(ChatLineModel::DisplayRole).toString().mid(click.start(), click.length());
+    if (!urlstr.contains("://"))
+        urlstr = "http://" + urlstr;
+    QUrl url = QUrl::fromEncoded(urlstr.toUtf8(), QUrl::TolerantMode);
+    chatScene()->loadWebPreview(this, url, urlRect);
+#endif
+}
+
+
+void ContentsChatItem::clearWebPreview()
+{
+#if defined HAVE_WEBKIT || defined HAVE_WEBENGINE
+    chatScene()->clearWebPreview(this);
+#endif
+}
+
+
+/*************************************************************************************************/
+
+ContentsChatItem::WrapColumnFinder::WrapColumnFinder(const ChatItem *_item)
+    : item(_item),
+    wrapList(item->data(ChatLineModel::WrapListRole).value<ChatLineModel::WrapList>()),
+    wordidx(0),
+    lineCount(0),
+    choppedTrailing(0)
+{
+}
+
+
+ContentsChatItem::WrapColumnFinder::~WrapColumnFinder()
+{
+}
+
+
+qint16 ContentsChatItem::WrapColumnFinder::nextWrapColumn(qreal width)
+{
+    if (wordidx >= wrapList.count())
+        return -1;
+
+    lineCount++;
+    qreal targetWidth = lineCount * width + choppedTrailing;
+
+    qint16 start = wordidx;
+    qint16 end = wrapList.count() - 1;
+
+    // check if the whole line fits
+    if (wrapList.at(end).endX <= targetWidth) //  || start == end)
+        return -1;
+
+    // check if we have a very long word that needs inter word wrap
+    if (wrapList.at(start).endX > targetWidth) {
+        if (!line.isValid()) {
+            item->initLayoutHelper(&layout, QTextOption::NoWrap);
+            layout.beginLayout();
+            line = layout.createLine();
+            layout.endLayout();
+        }
+        return line.xToCursor(targetWidth, QTextLine::CursorOnCharacter);
+    }
+
+    while (true) {
+        if (start + 1 == end) {
+            wordidx = end;
+            const ChatLineModel::Word &lastWord = wrapList.at(start); // the last word we were able to squeeze in
+
+            // both cases should be cought preliminary
+            Q_ASSERT(lastWord.endX <= targetWidth); // ensure that "start" really fits in
+            Q_ASSERT(end < wrapList.count()); // ensure that start isn't the last word
+
+            choppedTrailing += lastWord.trailing - (targetWidth - lastWord.endX);
+            return wrapList.at(wordidx).start;
+        }
+
+        qint16 pivot = (end + start) / 2;
+        if (wrapList.at(pivot).endX > targetWidth) {
+            end = pivot;
+        }
+        else {
+            start = pivot;
+        }
+    }
+    Q_ASSERT(false);
+    return -1;
+}
+
+
+/*************************************************************************************************/