1 /***************************************************************************
2 * Copyright (C) 2005-08 by the Quassel Project *
3 * devel@quassel-irc.org *
5 * This program is free software; you can redistribute it and/or modify *
6 * it under the terms of the GNU General Public License as published by *
7 * the Free Software Foundation; either version 2 of the License, or *
8 * (at your option) version 3. *
10 * This program is distributed in the hope that it will be useful, *
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
13 * GNU General Public License for more details. *
15 * You should have received a copy of the GNU General Public License *
16 * along with this program; if not, write to the *
17 * Free Software Foundation, Inc., *
18 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
19 ***************************************************************************/
21 #include <QApplication>
23 #include <QGraphicsSceneMouseEvent>
24 #include <QPersistentModelIndex>
28 #include "chatlinemodelitem.h"
29 #include "chatscene.h"
31 #include "clientbacklogmanager.h"
32 #include "columnhandleitem.h"
33 #include "messagefilter.h"
35 #include "qtuistyle.h"
36 #include "chatviewsettings.h"
37 #include "webpreviewitem.h"
39 const qreal minContentsWidth = 200;
41 ChatScene::ChatScene(QAbstractItemModel *model, const QString &idString, qreal width, QObject *parent)
42 : QGraphicsScene(0, 0, width, 0, parent),
45 _singleBufferScene(false),
46 _sceneRect(0, 0, width, 0),
53 MessageFilter *filter = qobject_cast<MessageFilter*>(model);
55 _singleBufferScene = filter->isSingleBufferFilter();
58 ChatViewSettings defaultSettings;
59 int defaultFirstColHandlePos = defaultSettings.value("FirstColumnHandlePos", 80).toInt();
60 int defaultSecondColHandlePos = defaultSettings.value("SecondColumnHandlePos", 200).toInt();
62 ChatViewSettings viewSettings(this);
63 firstColHandlePos = viewSettings.value("FirstColumnHandlePos", defaultFirstColHandlePos).toInt();
64 secondColHandlePos = viewSettings.value("SecondColumnHandlePos", defaultSecondColHandlePos).toInt();
66 firstColHandle = new ColumnHandleItem(QtUi::style()->firstColumnSeparator());
67 addItem(firstColHandle);
68 firstColHandle->setXPos(firstColHandlePos);
69 connect(firstColHandle, SIGNAL(positionChanged(qreal)), this, SLOT(handlePositionChanged(qreal)));
70 connect(this, SIGNAL(sceneRectChanged(const QRectF &)), firstColHandle, SLOT(sceneRectChanged(const QRectF &)));
72 secondColHandle = new ColumnHandleItem(QtUi::style()->secondColumnSeparator());
73 addItem(secondColHandle);
74 secondColHandle->setXPos(secondColHandlePos);
75 connect(secondColHandle, SIGNAL(positionChanged(qreal)), this, SLOT(handlePositionChanged(qreal)));
76 connect(this, SIGNAL(sceneRectChanged(const QRectF &)), secondColHandle, SLOT(sceneRectChanged(const QRectF &)));
80 connect(model, SIGNAL(rowsInserted(const QModelIndex &, int, int)),
81 this, SLOT(rowsInserted(const QModelIndex &, int, int)));
82 connect(model, SIGNAL(rowsAboutToBeRemoved(const QModelIndex &, int, int)),
83 this, SLOT(rowsAboutToBeRemoved(const QModelIndex &, int, int)));
85 if(model->rowCount() > 0)
86 rowsInserted(QModelIndex(), 0, model->rowCount() - 1);
89 ChatScene::~ChatScene() {
92 void ChatScene::rowsInserted(const QModelIndex &index, int start, int end) {
98 qreal y = _sceneRect.y();
99 qreal width = _sceneRect.width();
101 bool atBottom = false;
102 bool moveTop = false;
105 y = _lines.value(start - 1)->y() + _lines.value(start - 1)->height();
108 if(start == _lines.count())
111 qreal contentsWidth = width - secondColumnHandle()->sceneRight();
112 qreal senderWidth = secondColumnHandle()->sceneLeft() - firstColumnHandle()->sceneRight();
113 qreal timestampWidth = firstColumnHandle()->sceneLeft();
114 QPointF contentsPos(secondColumnHandle()->sceneRight(), 0);
115 QPointF senderPos(firstColumnHandle()->sceneRight(), 0);
118 for(int i = end; i >= start; i--) {
119 ChatLine *line = new ChatLine(i, model(),
121 timestampWidth, senderWidth, contentsWidth,
122 senderPos, contentsPos);
125 line->setPos(0, y+h);
127 line->setPos(0, y+h);
130 _lines.insert(start, line);
134 // update existing items
135 for(int i = end+1; i < _lines.count(); i++) {
136 _lines[i]->setRow(i);
140 if(_selectionStart >= 0) {
141 int offset = end - start + 1;
142 if(_selectionStart >= start) _selectionStart += offset;
143 if(_selectionEnd >= start) _selectionEnd += offset;
144 if(_firstSelectionRow >= start) _firstSelectionRow += offset;
145 if(_lastSelectionRow >= start) _lastSelectionRow += offset;
148 // neither pre- or append means we have to do dirty work: move items...
149 if(!(atTop || atBottom)) {
152 int moveEnd = _lines.count() - 1;
154 if(end > _lines.count() - end) {
163 for(int i = moveStart; i <= moveEnd; i++) {
165 line->setPos(0, line->pos().y() + offset);
170 if(atTop || moveTop) {
171 updateSceneRect(_sceneRect.adjusted(0, h, 0, 0));
173 updateSceneRect(_sceneRect.adjusted(0, 0, 0, h));
174 emit lastLineChanged(_lines.last());
179 void ChatScene::rowsAboutToBeRemoved(const QModelIndex &parent, int start, int end) {
184 qreal h = 0; // total height of removed items;
186 bool atTop = (start == 0);
187 bool atBottom = (end == _lines.count() - 1);
188 bool moveTop = false;
190 // remove items from scene
191 QList<ChatLine *>::iterator lineIter = _lines.begin() + start;
192 int lineCount = start;
193 while(lineIter != _lines.end() && lineCount <= end) {
194 h += (*lineIter)->height();
196 lineIter = _lines.erase(lineIter);
200 // update rows of remaining chatlines
201 for(int i = start; i < _lines.count(); i++) {
202 _lines.at(i)->setRow(i);
206 if(_selectionStart >= 0) {
207 int offset = end - start + 1;
208 if(_selectionStart >= start)
209 _selectionStart -= offset;
210 if(_selectionEnd >= start)
211 _selectionEnd -= offset;
212 if(_firstSelectionRow >= start)
213 _firstSelectionRow -= offset;
214 if(_lastSelectionRow >= start)
215 _lastSelectionRow -= offset;
218 // neither removing at bottom or top means we have to move items...
219 if(!(atTop || atBottom)) {
222 int moveEnd = _lines.count() - 1;
224 if(start > _lines.count() - end) {
233 for(int i = moveStart; i <= moveEnd; i++) {
235 line->setPos(0, line->pos().y() + offset);
240 if(atTop || moveTop) {
241 updateSceneRect(_sceneRect.adjusted(0, h, 0, 0));
243 updateSceneRect(_sceneRect.adjusted(0, 0, 0, -h));
247 void ChatScene::updateForViewport(qreal width, qreal height) {
248 _viewportHeight = height;
252 // setWidth is used for 2 things:
253 // a) updating the scene to fit the width of the corresponding view
254 // b) to update the positions of the items if a columhandle has changed it's position
255 // forceReposition is true in the second case
256 // this method features some codeduplication for the sake of performance
257 void ChatScene::setWidth(qreal width, bool forceReposition) {
258 if(width == _sceneRect.width() && !forceReposition)
261 // clock_t startT = clock();
263 qreal linePos = _sceneRect.y() + _sceneRect.height();
264 qreal yBottom = linePos;
265 QList<ChatLine *>::iterator lineIter = _lines.end();
266 QList<ChatLine *>::iterator lineIterBegin = _lines.begin();
268 qreal lineHeight = 0;
269 qreal contentsWidth = width - secondColumnHandle()->sceneRight();
271 if(forceReposition) {
272 qreal timestampWidth = firstColumnHandle()->sceneLeft();
273 qreal senderWidth = secondColumnHandle()->sceneLeft() - firstColumnHandle()->sceneRight();
274 QPointF senderPos(firstColumnHandle()->sceneRight(), 0);
275 QPointF contentsPos(secondColumnHandle()->sceneRight(), 0);
276 while(lineIter != lineIterBegin) {
279 lineHeight = line->setColumns(timestampWidth, senderWidth, contentsWidth, senderPos, contentsPos);
280 linePos -= lineHeight;
281 line->setPos(0, linePos);
284 while(lineIter != lineIterBegin) {
287 lineHeight = line->setGeometryByWidth(width, contentsWidth);
288 linePos -= lineHeight;
289 line->setPos(0, linePos);
293 updateSceneRect(QRectF(0, linePos, width, yBottom - linePos));
296 // clock_t endT = clock();
297 // qDebug() << "resized" << _lines.count() << "in" << (float)(endT - startT) / CLOCKS_PER_SEC << "sec";
300 void ChatScene::handlePositionChanged(qreal xpos) {
301 bool first = (sender() == firstColHandle);
304 oldx = firstColHandlePos;
305 firstColHandlePos = xpos;
307 oldx = secondColHandlePos;
308 secondColHandlePos = xpos;
311 ChatViewSettings viewSettings(this);
312 viewSettings.setValue("FirstColumnHandlePos", firstColHandlePos);
313 viewSettings.setValue("SecondColumnHandlePos", secondColHandlePos);
315 ChatViewSettings defaultSettings;
316 defaultSettings.setValue("FirstColumnHandlePos", firstColHandlePos);
317 defaultSettings.setValue("SecondColumnHandlePos", secondColHandlePos);
319 setWidth(width(), true); // readjust all chatlines
320 // we get ugly redraw errors if we don't update this explicitly... :(
321 // width() should be the same for both handles, so just use firstColHandle regardless
322 //update(qMin(oldx, xpos), 0, qMax(oldx, xpos) + firstColHandle->width(), height());
325 void ChatScene::setHandleXLimits() {
326 firstColHandle->setXLimits(0, secondColHandle->sceneLeft());
327 secondColHandle->setXLimits(firstColHandle->sceneRight(), width() - minContentsWidth);
330 void ChatScene::setSelectingItem(ChatItem *item) {
331 if(_selectingItem) _selectingItem->clearSelection();
332 _selectingItem = item;
335 void ChatScene::startGlobalSelection(ChatItem *item, const QPointF &itemPos) {
336 _selectionStart = _selectionEnd = _lastSelectionRow = _firstSelectionRow = item->row();
337 _selectionStartCol = _selectionMinCol = item->column();
339 _lines[_selectionStart]->setSelected(true, (ChatLineModel::ColumnType)_selectionMinCol);
340 updateSelection(item->mapToScene(itemPos));
343 void ChatScene::updateSelection(const QPointF &pos) {
344 // This is somewhat hacky... we look at the contents item that is at the cursor's y position (ignoring x), since
345 // it has the full height. From this item, we can then determine the row index and hence the ChatLine.
346 ChatItem *contentItem = static_cast<ChatItem *>(itemAt(QPointF(secondColHandle->sceneRight() + 1, pos.y())));
347 if(!contentItem) return;
349 int curRow = contentItem->row();
351 if(pos.x() > secondColHandle->sceneRight()) curColumn = ChatLineModel::ContentsColumn;
352 else if(pos.x() > firstColHandlePos) curColumn = ChatLineModel::SenderColumn;
353 else curColumn = ChatLineModel::TimestampColumn;
355 ChatLineModel::ColumnType minColumn = (ChatLineModel::ColumnType)qMin(curColumn, _selectionStartCol);
356 if(minColumn != _selectionMinCol) {
357 _selectionMinCol = minColumn;
358 for(int l = qMin(_selectionStart, _selectionEnd); l <= qMax(_selectionStart, _selectionEnd); l++) {
359 _lines[l]->setSelected(true, minColumn);
362 int newstart = qMin(curRow, _firstSelectionRow);
363 int newend = qMax(curRow, _firstSelectionRow);
364 if(newstart < _selectionStart) {
365 for(int l = newstart; l < _selectionStart; l++)
366 _lines[l]->setSelected(true, minColumn);
368 if(newstart > _selectionStart) {
369 for(int l = _selectionStart; l < newstart; l++)
370 _lines[l]->setSelected(false);
372 if(newend > _selectionEnd) {
373 for(int l = _selectionEnd+1; l <= newend; l++)
374 _lines[l]->setSelected(true, minColumn);
376 if(newend < _selectionEnd) {
377 for(int l = newend+1; l <= _selectionEnd; l++)
378 _lines[l]->setSelected(false);
381 _selectionStart = newstart;
382 _selectionEnd = newend;
383 _lastSelectionRow = curRow;
385 if(newstart == newend && minColumn == ChatLineModel::ContentsColumn) {
386 if(!_selectingItem) {
387 qWarning() << "WARNING: ChatScene::updateSelection() has a null _selectingItem, this should never happen! Please report.";
390 _lines[curRow]->setSelected(false);
391 _isSelecting = false;
392 _selectingItem->continueSelecting(_selectingItem->mapFromScene(pos));
396 void ChatScene::mouseMoveEvent(QGraphicsSceneMouseEvent *event) {
397 if(_isSelecting && event->buttons() == Qt::LeftButton) {
398 updateSelection(event->scenePos());
401 QGraphicsScene::mouseMoveEvent(event);
405 void ChatScene::mousePressEvent(QGraphicsSceneMouseEvent *event) {
406 if(event->buttons() == Qt::LeftButton && _selectionStart >= 0) {
407 for(int l = qMin(_selectionStart, _selectionEnd); l <= qMax(_selectionStart, _selectionEnd); l++) {
408 _lines[l]->setSelected(false);
410 _selectionStart = -1;
411 QGraphicsScene::mousePressEvent(event); // so we can start a new local selection
413 QGraphicsScene::mousePressEvent(event);
417 void ChatScene::mouseReleaseEvent(QGraphicsSceneMouseEvent *event) {
418 if(_isSelecting && !event->buttons() & Qt::LeftButton) {
419 putToClipboard(selectionToString());
420 _isSelecting = false;
423 QGraphicsScene::mouseReleaseEvent(event);
427 void ChatScene::putToClipboard(const QString &selection) {
428 // TODO Configure clipboards
430 QApplication::clipboard()->setText(selection, QClipboard::Selection);
433 QApplication::clipboard()->setText(selection);
437 //!\brief Convert current selection to human-readable string.
438 QString ChatScene::selectionToString() const {
439 //TODO Make selection format configurable!
440 if(!_isSelecting) return QString();
441 int start = qMin(_selectionStart, _selectionEnd);
442 int end = qMax(_selectionStart, _selectionEnd);
443 if(start < 0 || end >= _lines.count()) {
444 qDebug() << "Invalid selection range:" << start << end;
448 for(int l = start; l <= end; l++) {
449 if(_selectionMinCol == ChatLineModel::TimestampColumn)
450 result += _lines[l]->item(ChatLineModel::TimestampColumn).data(MessageModel::DisplayRole).toString() + " ";
451 if(_selectionMinCol <= ChatLineModel::SenderColumn)
452 result += _lines[l]->item(ChatLineModel::SenderColumn).data(MessageModel::DisplayRole).toString() + " ";
453 result += _lines[l]->item(ChatLineModel::ContentsColumn).data(MessageModel::DisplayRole).toString() + "\n";
458 void ChatScene::requestBacklog() {
459 static const int REQUEST_COUNT = 500;
460 int backlogSize = model()->rowCount();
461 if(isSingleBufferScene() && backlogSize != 0 && _lastBacklogSize + REQUEST_COUNT <= backlogSize) {
462 QModelIndex msgIdx = model()->index(0, 0);
463 MsgId msgId = model()->data(msgIdx, ChatLineModel::MsgIdRole).value<MsgId>();
464 BufferId bufferId = model()->data(msgIdx, ChatLineModel::BufferIdRole).value<BufferId>();
465 _lastBacklogSize = backlogSize;
466 Client::backlogManager()->requestBacklog(bufferId, REQUEST_COUNT, msgId.toInt());
470 int ChatScene::sectionByScenePos(int x) {
471 if(x < firstColHandle->x())
472 return ChatLineModel::TimestampColumn;
473 if(x < secondColHandle->x())
474 return ChatLineModel::SenderColumn;
476 return ChatLineModel::ContentsColumn;
479 void ChatScene::updateSceneRect(const QRectF &rect) {
485 void ChatScene::loadWebPreview(ChatItem *parentItem, const QString &url, const QRectF &urlRect) {
491 if(webPreview.parentItem != parentItem)
492 webPreview.parentItem = parentItem;
494 if(webPreview.url != url) {
495 webPreview.url = url;
496 // load a new web view and delete the old one (if exists)
497 if(webPreview.previewItem) {
498 removeItem(webPreview.previewItem);
499 delete webPreview.previewItem;
501 webPreview.previewItem = new WebPreviewItem(url);
502 addItem(webPreview.previewItem);
504 if(webPreview.urlRect != urlRect) {
505 webPreview.urlRect = urlRect;
506 qreal previewY = urlRect.bottom();
507 qreal previewX = urlRect.x();
508 if(previewY + webPreview.previewItem->boundingRect().height() > sceneRect().bottom())
509 previewY = urlRect.y() - webPreview.previewItem->boundingRect().height();
511 if(previewX + webPreview.previewItem->boundingRect().width() > sceneRect().width())
512 previewX = sceneRect().right() - webPreview.previewItem->boundingRect().width();
514 webPreview.previewItem->setPos(previewX, previewY);
519 void ChatScene::clearWebPreview(ChatItem *parentItem) {
523 if(parentItem == 0 || webPreview.parentItem == parentItem) {
524 if(webPreview.previewItem) {
525 removeItem(webPreview.previewItem);
526 delete webPreview.previewItem;
527 webPreview.previewItem = 0;
529 webPreview.parentItem = 0;
530 webPreview.url = QString();
531 webPreview.urlRect = QRectF();