* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
***************************************************************************/
+#include <QApplication>
+#include <QClipboard>
#include <QFontMetrics>
#include <QGraphicsSceneMouseEvent>
-#include <QTextCursor>
-#include <QTextDocument>
-
-#include <QtGui>
+#include <QPainter>
+#include <QPalette>
+#include <QTextLayout>
#include "chatitem.h"
#include "chatlinemodel.h"
#include "qtui.h"
ChatItem::ChatItem(const QPersistentModelIndex &index_, QGraphicsItem *parent) : QGraphicsItem(parent), _index(index_) {
- QFontMetricsF *metrics = QtUi::style()->fontMetrics(data(ChatLineModel::FormatRole).value<UiStyle::FormatList>().at(0).second);
- _lineHeight = metrics->lineSpacing();
+ _fontMetrics = QtUi::style()->fontMetrics(data(ChatLineModel::FormatRole).value<UiStyle::FormatList>().at(0).second);
+ _layout = 0;
+ _lines = 0;
+ _selectionStart = -1;
+ _selectionMode = NoSelection;
}
ChatItem::~ChatItem() {
-
+ delete _layout;
}
QVariant ChatItem::data(int role) const {
return _index.data(role);
}
-/*
-QRectF ChatItem::boundingRect() const {
- return QRectF(0, 0, _width, _height);
-}
-*/
-
-void ChatItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget) {
- Q_UNUSED(option); Q_UNUSED(widget);
-
- painter->drawText(boundingRect(), data(MessageModel::DisplayRole).toString());
- painter->setPen(Qt::DotLine);
- painter->drawRect(boundingRect());
-}
-
-int ChatItem::setWidth(int w) {
+qreal ChatItem::setWidth(qreal w) {
if(w == _boundingRect.width()) return _boundingRect.height();
- int h = heightForWidth(w);
+ prepareGeometryChange();
_boundingRect.setWidth(w);
+ qreal h = computeHeight();
_boundingRect.setHeight(h);
+ if(haveLayout()) updateLayout();
return h;
}
-int ChatItem::heightForWidth(int width) {
+qreal ChatItem::computeHeight() {
if(data(ChatLineModel::ColumnTypeRole).toUInt() != ChatLineModel::ContentsColumn)
- return _lineHeight; // only contents can be multi-line
-
- QVariantList wrapList = data(ChatLineModel::WrapListRole).toList();
- int lines = 1;
- int offset = 0;
- for(int i = 0; i < wrapList.count(); i+=2) {
- if(wrapList.at(i+1).toUInt() - offset < width) continue;
- lines++;
- if(i > 0) {
- if(offset < wrapList.at(i-1).toUInt()) offset = wrapList.at(i-1).toUInt();
- else offset += width;
- } else {
- offset += width;
- }
- i-=2;
- }
- return lines * _lineHeight;
+ return fontMetrics()->lineSpacing(); // only contents can be multi-line
+
+ _lines = 1;
+ WrapColumnFinder finder(this);
+ while(finder.nextWrapColumn() > 0) _lines++;
+ return _lines * fontMetrics()->lineSpacing();
}
-/*
+QTextLayout *ChatItem::createLayout(QTextOption::WrapMode wrapMode, Qt::Alignment alignment) {
+ QTextLayout *layout = new QTextLayout(data(MessageModel::DisplayRole).toString());
+
+ QTextOption option;
+ option.setWrapMode(wrapMode);
+ option.setAlignment(alignment);
+ layout->setTextOption(option);
-void ChatItem::setTextOption(const QTextOption &option) {
- _textOption = option;
- layout();
+ QList<QTextLayout::FormatRange> formatRanges
+ = QtUi::style()->toTextLayoutList(data(MessageModel::FormatRole).value<UiStyle::FormatList>(), layout->text().length());
+ layout->setAdditionalFormats(formatRanges);
+ return layout;
}
-QTextOption ChatItem::textOption() const {
- return _textOption;
+void ChatItem::updateLayout() {
+ switch(data(ChatLineModel::ColumnTypeRole).toUInt()) {
+ case ChatLineModel::TimestampColumn:
+ if(!haveLayout()) _layout = createLayout(QTextOption::WrapAnywhere, Qt::AlignLeft);
+ // fallthrough
+ case ChatLineModel::SenderColumn:
+ if(!haveLayout()) _layout = createLayout(QTextOption::WrapAnywhere, Qt::AlignRight);
+ _layout->beginLayout();
+ {
+ QTextLine line = _layout->createLine();
+ if(line.isValid()) {
+ line.setLineWidth(width());
+ line.setPosition(QPointF(0,0));
+ }
+ _layout->endLayout();
+ }
+ break;
+ case ChatLineModel::ContentsColumn: {
+ if(!haveLayout()) _layout = createLayout(QTextOption::WrapAnywhere);
+
+ // Now layout
+ ChatLineModel::WrapList wrapList = data(ChatLineModel::WrapListRole).value<ChatLineModel::WrapList>();
+ if(!wrapList.count()) return; // empty chatitem
+
+ 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());
+ line.setPosition(QPointF(0, h));
+ h += line.height() + fontMetrics()->leading();
+ }
+ _layout->endLayout();
+ }
+ break;
+ }
}
-QString ChatItem::text() const {
- return _layout.text();
+void ChatItem::clearLayout() {
+ delete _layout;
+ _layout = 0;
}
-void ChatItem::setText(const UiStyle::StyledText &text) {
- _layout.setText(text.text);
- _layout.setAdditionalFormats(text.formatList);
- layout();
+// 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);
+ if(!haveLayout()) updateLayout();
+ painter->setClipRect(boundingRect()); // no idea why QGraphicsItem clipping won't work
+ if(_selectionMode == FullSelection) {
+ painter->save();
+ painter->fillRect(boundingRect(), QApplication::palette().brush(QPalette::Highlight));
+ painter->restore();
+ } // TODO: add selection format here
+ QVector<QTextLayout::FormatRange> formats;
+ if(_selectionMode != NoSelection) {
+ QTextLayout::FormatRange selectFmt;
+ selectFmt.format.setForeground(QApplication::palette().brush(QPalette::HighlightedText));
+ selectFmt.format.setBackground(QApplication::palette().brush(QPalette::Highlight));
+ if(_selectionMode == PartialSelection) {
+ selectFmt.start = qMin(_selectionStart, _selectionEnd);
+ selectFmt.length = qAbs(_selectionStart - _selectionEnd);
+ } else { // FullSelection
+ selectFmt.start = 0;
+ selectFmt.length = data(MessageModel::DisplayRole).toString().length();
+ }
+ formats.append(selectFmt);
+ }
+ _layout->draw(painter, QPointF(0,0), formats, boundingRect());
}
-void ChatItem::layout() {
- if(!_layout.additionalFormats().count()) return; // no text set
- if(_width <= 0) return;
- prepareGeometryChange();
- QFontMetrics metrics(_layout.additionalFormats()[0].format.font());
- int leading = metrics.leading();
- int height = 0;
- _layout.setTextOption(textOption());
- _layout.beginLayout();
- while(1) {
- QTextLine line = _layout.createLine();
- if(!line.isValid()) break;
- line.setLineWidth(_width);
- if(textOption().wrapMode() != QTextOption::NoWrap && line.naturalTextWidth() > _width) {
- // word did not fit, we need to wrap it in the middle
- // this is a workaround for Qt failing to handle WrapAtWordBoundaryOrAnywhere correctly
- QTextOption::WrapMode mode = textOption().wrapMode();
- textOption().setWrapMode(QTextOption::WrapAnywhere);
- _layout.setTextOption(textOption());
- line.setLineWidth(_width);
- textOption().setWrapMode(mode);
- _layout.setTextOption(textOption());
+qint16 ChatItem::posToCursor(const QPointF &pos) {
+ if(pos.y() > height()) return data(MessageModel::DisplayRole).toString().length();
+ if(pos.y() < 0) return 0;
+ if(!haveLayout()) updateLayout();
+ 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);
}
- height += leading;
- line.setPosition(QPoint(0, height));
- height += line.height();
}
- _layout.endLayout();
- update();
-} QDateTime _timestamp;
- MsgId _msgId;
+ return 0;
+}
+void ChatItem::setFullSelection() {
+ _selectionMode = FullSelection;
+ update();
+}
-QRectF ChatItem::boundingRect() const {
- return _layout.boundingRect();
+void ChatItem::clearSelection() {
+ _selectionMode = NoSelection;
+ update();
}
-void ChatItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget) {
- Q_UNUSED(option); Q_UNUSED(widget);
- _layout.draw(painter, QPointF(0, 0));
+void ChatItem::mousePressEvent(QGraphicsSceneMouseEvent *event) {
+ if(event->buttons() & Qt::LeftButton) {
+ chatScene()->setSelectingItem(this); // removes earlier selection if exists
+ _selectionStart = _selectionEnd = posToCursor(event->pos());
+ _selectionMode = PartialSelection;
+ event->accept();
+ } else {
+ event->ignore();
+ }
+}
+void ChatItem::mouseMoveEvent(QGraphicsSceneMouseEvent *event) {
+ if(contains(event->pos())) {
+ _selectionEnd = posToCursor(event->pos());
+ update();
+ } else {
+ setFullSelection();
+ ungrabMouse();
+ chatScene()->startGlobalSelection(this);
+ }
}
-*/
-/*
-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);
+void ChatItem::mouseReleaseEvent(QGraphicsSceneMouseEvent *event) {
+ if(_selectionMode != NoSelection) {
+ _selectionEnd = posToCursor(event->pos());
+ QString selection
+ = data(MessageModel::DisplayRole).toString().mid(qMin(_selectionStart, _selectionEnd), qAbs(_selectionStart - _selectionEnd));
+ QApplication::clipboard()->setText(selection, QClipboard::Clipboard); // TODO configure where selections should go
+ event->accept();
+ } else {
event->ignore();
- } else QGraphicsTextItem::mouseMoveEvent(event);
+ }
}
-*/
+/*************************************************************************************************/
+
+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;
+}
+ChatItem::WrapColumnFinder::~WrapColumnFinder() {
+ delete layout;
+}
+qint16 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();
+ }
+ int idx = line.xToCursor(lastwrappos + item->width(), QTextLine::CursorOnCharacter);
+ qreal x = line.cursorToX(idx, QTextLine::Trailing);
+ 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;
+}
projects / quassel.git / blobdiff