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qTox/src/chatlog/chatlog.cpp

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/*
Copyright © 2014-2019 by The qTox Project Contributors
This file is part of qTox, a Qt-based graphical interface for Tox.
qTox is libre software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
qTox is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with qTox. If not, see <http://www.gnu.org/licenses/>.
*/
#include "chatlog.h"
#include "chatlinecontent.h"
#include "chatlinecontentproxy.h"
#include "chatmessage.h"
#include "content/filetransferwidget.h"
#include "src/widget/translator.h"
#include "src/widget/style.h"
#include <QAction>
#include <QApplication>
#include <QClipboard>
#include <QDebug>
#include <QMouseEvent>
#include <QScrollBar>
#include <QShortcut>
#include <QTimer>
/**
* @var ChatLog::repNameAfter
* @brief repetition interval sender name (sec)
*/
template <class T>
T clamp(T x, T min, T max)
{
if (x > max)
return max;
if (x < min)
return min;
return x;
}
ChatLog::ChatLog(QWidget* parent)
: QGraphicsView(parent)
{
// Create the scene
busyScene = new QGraphicsScene(this);
scene = new QGraphicsScene(this);
scene->setItemIndexMethod(QGraphicsScene::BspTreeIndex);
setScene(scene);
// Cfg.
setInteractive(true);
setAcceptDrops(false);
setAlignment(Qt::AlignTop | Qt::AlignLeft);
setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
setDragMode(QGraphicsView::NoDrag);
setViewportUpdateMode(MinimalViewportUpdate);
setContextMenuPolicy(Qt::CustomContextMenu);
setBackgroundBrush(QBrush(Style::getColor(Style::GroundBase), Qt::SolidPattern));
// The selection rect for multi-line selection
selGraphItem = scene->addRect(0, 0, 0, 0, selectionRectColor.darker(120), selectionRectColor);
selGraphItem->setZValue(-1.0); // behind all other items
// copy action (ie. Ctrl+C)
copyAction = new QAction(this);
copyAction->setIcon(QIcon::fromTheme("edit-copy"));
copyAction->setShortcut(QKeySequence::Copy);
copyAction->setEnabled(false);
connect(copyAction, &QAction::triggered, this, [this]() { copySelectedText(); });
addAction(copyAction);
// Ctrl+Insert shortcut
QShortcut* copyCtrlInsShortcut = new QShortcut(QKeySequence(Qt::CTRL + Qt::Key_Insert), this);
connect(copyCtrlInsShortcut, &QShortcut::activated, this, [this]() { copySelectedText(); });
// select all action (ie. Ctrl+A)
selectAllAction = new QAction(this);
selectAllAction->setIcon(QIcon::fromTheme("edit-select-all"));
selectAllAction->setShortcut(QKeySequence::SelectAll);
connect(selectAllAction, &QAction::triggered, this, [this]() { selectAll(); });
addAction(selectAllAction);
// This timer is used to scroll the view while the user is
// moving the mouse past the top/bottom edge of the widget while selecting.
selectionTimer = new QTimer(this);
selectionTimer->setInterval(1000 / 30);
selectionTimer->setSingleShot(false);
selectionTimer->start();
connect(selectionTimer, &QTimer::timeout, this, &ChatLog::onSelectionTimerTimeout);
// Background worker
// Updates the layout of all chat-lines after a resize
workerTimer = new QTimer(this);
workerTimer->setSingleShot(false);
workerTimer->setInterval(5);
connect(workerTimer, &QTimer::timeout, this, &ChatLog::onWorkerTimeout);
// This timer is used to detect multiple clicks
multiClickTimer = new QTimer(this);
multiClickTimer->setSingleShot(true);
multiClickTimer->setInterval(QApplication::doubleClickInterval());
connect(multiClickTimer, &QTimer::timeout, this, &ChatLog::onMultiClickTimeout);
// selection
connect(this, &ChatLog::selectionChanged, this, [this]() {
copyAction->setEnabled(hasTextToBeCopied());
copySelectedText(true);
});
retranslateUi();
Translator::registerHandler(std::bind(&ChatLog::retranslateUi, this), this);
}
ChatLog::~ChatLog()
{
Translator::unregister(this);
// Remove chatlines from scene
for (ChatLine::Ptr l : lines)
l->removeFromScene();
if (busyNotification)
busyNotification->removeFromScene();
if (typingNotification)
typingNotification->removeFromScene();
}
void ChatLog::clearSelection()
{
if (selectionMode == None)
return;
for (int i = selFirstRow; i <= selLastRow; ++i)
lines[i]->selectionCleared();
selFirstRow = -1;
selLastRow = -1;
selClickedCol = -1;
selClickedRow = -1;
selectionMode = None;
emit selectionChanged();
updateMultiSelectionRect();
}
QRect ChatLog::getVisibleRect() const
{
return mapToScene(viewport()->rect()).boundingRect().toRect();
}
void ChatLog::updateSceneRect()
{
setSceneRect(calculateSceneRect());
}
void ChatLog::layout(int start, int end, qreal width)
{
if (lines.empty())
return;
qreal h = 0.0;
// Line at start-1 is considered to have the correct position. All following lines are
// positioned in respect to this line.
if (start - 1 >= 0)
h = lines[start - 1]->sceneBoundingRect().bottom() + lineSpacing;
start = clamp<int>(start, 0, lines.size());
end = clamp<int>(end + 1, 0, lines.size());
for (int i = start; i < end; ++i) {
ChatLine* l = lines[i].get();
l->layout(width, QPointF(0.0, h));
h += l->sceneBoundingRect().height() + lineSpacing;
}
}
void ChatLog::mousePressEvent(QMouseEvent* ev)
{
QGraphicsView::mousePressEvent(ev);
if (ev->button() == Qt::LeftButton) {
clickPos = ev->pos();
clearSelection();
}
if (lastClickButton == ev->button()) {
// Counts only single clicks and first click of doule click
clickCount++;
}
else {
clickCount = 1; // restarting counter
lastClickButton = ev->button();
}
lastClickPos = ev->pos();
// Triggers on odd click counts
handleMultiClickEvent();
}
void ChatLog::mouseReleaseEvent(QMouseEvent* ev)
{
QGraphicsView::mouseReleaseEvent(ev);
selectionScrollDir = NoDirection;
multiClickTimer->start();
}
void ChatLog::mouseMoveEvent(QMouseEvent* ev)
{
QGraphicsView::mouseMoveEvent(ev);
QPointF scenePos = mapToScene(ev->pos());
if (ev->buttons() & Qt::LeftButton) {
// autoscroll
if (ev->pos().y() < 0)
selectionScrollDir = Up;
else if (ev->pos().y() > height())
selectionScrollDir = Down;
else
selectionScrollDir = NoDirection;
// select
if (selectionMode == None
&& (clickPos - ev->pos()).manhattanLength() > QApplication::startDragDistance()) {
QPointF sceneClickPos = mapToScene(clickPos.toPoint());
ChatLine::Ptr line = findLineByPosY(scenePos.y());
ChatLineContent* content = getContentFromPos(sceneClickPos);
if (content) {
selClickedRow = content->getRow();
selClickedCol = content->getColumn();
selFirstRow = content->getRow();
selLastRow = content->getRow();
content->selectionStarted(sceneClickPos);
selectionMode = Precise;
// ungrab mouse grabber
if (scene->mouseGrabberItem())
scene->mouseGrabberItem()->ungrabMouse();
} else if (line.get()) {
selClickedRow = line->getRow();
selFirstRow = selClickedRow;
selLastRow = selClickedRow;
selectionMode = Multi;
}
}
if (selectionMode != None) {
ChatLineContent* content = getContentFromPos(scenePos);
ChatLine::Ptr line = findLineByPosY(scenePos.y());
int row;
if (content) {
row = content->getRow();
int col = content->getColumn();
if (row == selClickedRow && col == selClickedCol) {
selectionMode = Precise;
content->selectionMouseMove(scenePos);
selGraphItem->hide();
} else if (col != selClickedCol) {
selectionMode = Multi;
lines[selClickedRow]->selectionCleared();
}
} else if (line.get()) {
row = line->getRow();
if (row != selClickedRow) {
selectionMode = Multi;
lines[selClickedRow]->selectionCleared();
}
} else {
return;
}
if (row >= selClickedRow)
selLastRow = row;
if (row <= selClickedRow)
selFirstRow = row;
updateMultiSelectionRect();
}
emit selectionChanged();
}
}
// Much faster than QGraphicsScene::itemAt()!
ChatLineContent* ChatLog::getContentFromPos(QPointF scenePos) const
{
if (lines.empty())
return nullptr;
auto itr =
std::lower_bound(lines.cbegin(), lines.cend(), scenePos.y(), ChatLine::lessThanBSRectBottom);
// find content
if (itr != lines.cend() && (*itr)->sceneBoundingRect().contains(scenePos))
return (*itr)->getContent(scenePos);
return nullptr;
}
bool ChatLog::isOverSelection(QPointF scenePos) const
{
if (selectionMode == Precise) {
ChatLineContent* content = getContentFromPos(scenePos);
if (content)
return content->isOverSelection(scenePos);
} else if (selectionMode == Multi) {
if (selGraphItem->rect().contains(scenePos))
return true;
}
return false;
}
qreal ChatLog::useableWidth() const
{
return width() - verticalScrollBar()->sizeHint().width() - margins.right() - margins.left();
}
void ChatLog::reposition(int start, int end, qreal deltaY)
{
if (lines.isEmpty())
return;
start = clamp<int>(start, 0, lines.size() - 1);
end = clamp<int>(end + 1, 0, lines.size());
for (int i = start; i < end; ++i) {
ChatLine* l = lines[i].get();
l->moveBy(deltaY);
}
}
void ChatLog::insertChatlineAtBottom(ChatLine::Ptr l)
{
if (!l.get())
return;
bool stickToBtm = stickToBottom();
// insert
l->setRow(lines.size());
l->addToScene(scene);
lines.append(l);
// partial refresh
layout(lines.last()->getRow(), lines.size(), useableWidth());
updateSceneRect();
if (stickToBtm)
scrollToBottom();
checkVisibility();
updateTypingNotification();
}
void ChatLog::insertChatlineOnTop(ChatLine::Ptr l)
{
if (!l.get())
return;
insertChatlinesOnTop(QList<ChatLine::Ptr>() << l);
}
void ChatLog::insertChatlinesOnTop(const QList<ChatLine::Ptr>& newLines)
{
if (newLines.isEmpty())
return;
QGraphicsScene::ItemIndexMethod oldIndexMeth = scene->itemIndexMethod();
scene->setItemIndexMethod(QGraphicsScene::NoIndex);
// alloc space for old and new lines
QVector<ChatLine::Ptr> combLines;
combLines.reserve(newLines.size() + lines.size());
// add the new lines
int i = 0;
for (ChatLine::Ptr l : newLines) {
l->addToScene(scene);
l->visibilityChanged(false);
l->setRow(i++);
combLines.push_back(l);
}
// add the old lines
for (ChatLine::Ptr l : lines) {
l->setRow(i++);
combLines.push_back(l);
}
lines = combLines;
scene->setItemIndexMethod(oldIndexMeth);
// redo layout
startResizeWorker();
}
bool ChatLog::stickToBottom() const
{
return verticalScrollBar()->value() == verticalScrollBar()->maximum();
}
void ChatLog::scrollToBottom()
{
updateSceneRect();
verticalScrollBar()->setValue(verticalScrollBar()->maximum());
}
void ChatLog::startResizeWorker()
{
if (lines.empty())
return;
// (re)start the worker
if (!workerTimer->isActive()) {
// these values must not be reevaluated while the worker is running
workerStb = stickToBottom();
if (!visibleLines.empty())
workerAnchorLine = visibleLines.first();
}
// switch to busy scene displaying the busy notification if there is a lot
// of text to be resized
int txt = 0;
for (ChatLine::Ptr line : lines) {
if (txt > 500000)
break;
for (ChatLineContent* content : line->content)
txt += content->getText().size();
}
if (txt > 500000)
setScene(busyScene);
workerLastIndex = 0;
workerTimer->start();
verticalScrollBar()->hide();
}
void ChatLog::mouseDoubleClickEvent(QMouseEvent* ev)
{
QPointF scenePos = mapToScene(ev->pos());
ChatLineContent* content = getContentFromPos(scenePos);
if (content) {
content->selectionDoubleClick(scenePos);
selClickedCol = content->getColumn();
selClickedRow = content->getRow();
selFirstRow = content->getRow();
selLastRow = content->getRow();
selectionMode = Precise;
emit selectionChanged();
}
if (lastClickButton == ev->button()) {
// Counts the second click of double click
clickCount++;
}
else {
clickCount = 1; // restarting counter
lastClickButton = ev->button();
}
lastClickPos = ev->pos();
// Triggers on even click counts
handleMultiClickEvent();
}
QString ChatLog::getSelectedText() const
{
if (selectionMode == Precise) {
return lines[selClickedRow]->content[selClickedCol]->getSelectedText();
} else if (selectionMode == Multi) {
// build a nicely formatted message
QString out;
for (int i = selFirstRow; i <= selLastRow; ++i) {
if (lines[i]->content[1]->getText().isEmpty())
continue;
QString timestamp = lines[i]->content[2]->getText().isEmpty()
? tr("pending")
: lines[i]->content[2]->getText();
QString author = lines[i]->content[0]->getText();
QString msg = lines[i]->content[1]->getText();
out +=
QString(out.isEmpty() ? "[%2] %1: %3" : "\n[%2] %1: %3").arg(author, timestamp, msg);
}
return out;
}
return QString();
}
bool ChatLog::isEmpty() const
{
return lines.isEmpty();
}
bool ChatLog::hasTextToBeCopied() const
{
return selectionMode != None;
}
ChatLine::Ptr ChatLog::getTypingNotification() const
{
return typingNotification;
}
QVector<ChatLine::Ptr> ChatLog::getLines()
{
return lines;
}
ChatLine::Ptr ChatLog::getLatestLine() const
{
if (!lines.empty()) {
return lines.last();
}
return nullptr;
}
ChatLine::Ptr ChatLog::getFirstLine() const
{
if (!lines.empty()) {
return lines.first();
}
return nullptr;
}
/**
* @brief Finds the chat line object at a position on screen
* @param pos Position on screen in global coordinates
* @sa getContentFromPos()
*/
ChatLineContent* ChatLog::getContentFromGlobalPos(QPoint pos) const
{
return getContentFromPos(mapToScene(mapFromGlobal(pos)));
}
void ChatLog::clear()
{
clearSelection();
QVector<ChatLine::Ptr> savedLines;
for (ChatLine::Ptr l : lines) {
if (isActiveFileTransfer(l))
savedLines.push_back(l);
else
l->removeFromScene();
}
lines.clear();
visibleLines.clear();
for (ChatLine::Ptr l : savedLines)
insertChatlineAtBottom(l);
updateSceneRect();
}
void ChatLog::copySelectedText(bool toSelectionBuffer) const
{
QString text = getSelectedText();
QClipboard* clipboard = QApplication::clipboard();
if (clipboard && !text.isNull())
clipboard->setText(text, toSelectionBuffer ? QClipboard::Selection : QClipboard::Clipboard);
}
void ChatLog::setBusyNotification(ChatLine::Ptr notification)
{
if (!notification.get())
return;
busyNotification = notification;
busyNotification->addToScene(busyScene);
busyNotification->visibilityChanged(true);
}
void ChatLog::setTypingNotification(ChatLine::Ptr notification)
{
typingNotification = notification;
typingNotification->visibilityChanged(true);
typingNotification->setVisible(false);
typingNotification->addToScene(scene);
updateTypingNotification();
}
void ChatLog::setTypingNotificationVisible(bool visible)
{
if (typingNotification.get()) {
typingNotification->setVisible(visible);
updateTypingNotification();
}
}
void ChatLog::scrollToLine(ChatLine::Ptr line)
{
if (!line.get())
return;
updateSceneRect();
verticalScrollBar()->setValue(line->sceneBoundingRect().top());
}
void ChatLog::selectAll()
{
if (lines.empty())
return;
clearSelection();
selectionMode = Multi;
selFirstRow = 0;
selLastRow = lines.size() - 1;
emit selectionChanged();
updateMultiSelectionRect();
}
void ChatLog::fontChanged(const QFont& font)
{
for (ChatLine::Ptr l : lines) {
l->fontChanged(font);
}
}
void ChatLog::reloadTheme()
{
setBackgroundBrush(QBrush(Style::getColor(Style::GroundBase), Qt::SolidPattern));
selectionRectColor = Style::getColor(Style::SelectText);
selGraphItem->setBrush(QBrush(selectionRectColor));
selGraphItem->setPen(QPen(selectionRectColor.darker(120)));
for (ChatLine::Ptr l : lines) {
l->reloadTheme();
}
}
void ChatLog::forceRelayout()
{
startResizeWorker();
}
void ChatLog::checkVisibility()
{
if (lines.empty())
return;
// find first visible line
auto lowerBound = std::lower_bound(lines.cbegin(), lines.cend(), getVisibleRect().top(),
ChatLine::lessThanBSRectBottom);
// find last visible line
auto upperBound = std::lower_bound(lowerBound, lines.cend(), getVisibleRect().bottom(),
ChatLine::lessThanBSRectTop);
// set visibilty
QList<ChatLine::Ptr> newVisibleLines;
for (auto itr = lowerBound; itr != upperBound; ++itr) {
newVisibleLines.append(*itr);
if (!visibleLines.contains(*itr))
(*itr)->visibilityChanged(true);
visibleLines.removeOne(*itr);
}
// these lines are no longer visible
for (ChatLine::Ptr line : visibleLines)
line->visibilityChanged(false);
visibleLines = newVisibleLines;
// enforce order
std::sort(visibleLines.begin(), visibleLines.end(), ChatLine::lessThanRowIndex);
// if (!visibleLines.empty())
// qDebug() << "visible from " << visibleLines.first()->getRow() << "to " <<
// visibleLines.last()->getRow() << " total " << visibleLines.size();
if (!visibleLines.isEmpty()) {
emit firstVisibleLineChanged(visibleLines.at(0));
}
}
void ChatLog::scrollContentsBy(int dx, int dy)
{
QGraphicsView::scrollContentsBy(dx, dy);
checkVisibility();
}
void ChatLog::resizeEvent(QResizeEvent* ev)
{
bool stb = stickToBottom();
if (ev->size().width() != ev->oldSize().width()) {
startResizeWorker();
stb = false; // let the resize worker handle it
}
QGraphicsView::resizeEvent(ev);
if (stb)
scrollToBottom();
updateBusyNotification();
}
void ChatLog::updateMultiSelectionRect()
{
if (selectionMode == Multi && selFirstRow >= 0 && selLastRow >= 0) {
QRectF selBBox;
selBBox = selBBox.united(lines[selFirstRow]->sceneBoundingRect());
selBBox = selBBox.united(lines[selLastRow]->sceneBoundingRect());
if (selGraphItem->rect() != selBBox)
scene->invalidate(selGraphItem->rect());
selGraphItem->setRect(selBBox);
selGraphItem->show();
} else {
selGraphItem->hide();
}
}
void ChatLog::updateTypingNotification()
{
ChatLine* notification = typingNotification.get();
if (!notification)
return;
qreal posY = 0.0;
if (!lines.empty())
posY = lines.last()->sceneBoundingRect().bottom() + lineSpacing;
notification->layout(useableWidth(), QPointF(0.0, posY));
}
void ChatLog::updateBusyNotification()
{
if (busyNotification.get()) {
// repoisition the busy notification (centered)
busyNotification->layout(useableWidth(), getVisibleRect().topLeft()
+ QPointF(0, getVisibleRect().height() / 2.0));
}
}
ChatLine::Ptr ChatLog::findLineByPosY(qreal yPos) const
{
auto itr = std::lower_bound(lines.cbegin(), lines.cend(), yPos, ChatLine::lessThanBSRectBottom);
if (itr != lines.cend())
return *itr;
return ChatLine::Ptr();
}
QRectF ChatLog::calculateSceneRect() const
{
qreal bottom = (lines.empty() ? 0.0 : lines.last()->sceneBoundingRect().bottom());
if (typingNotification.get() != nullptr)
bottom += typingNotification->sceneBoundingRect().height() + lineSpacing;
return QRectF(-margins.left(), -margins.top(), useableWidth(),
bottom + margins.bottom() + margins.top());
}
void ChatLog::onSelectionTimerTimeout()
{
const int scrollSpeed = 10;
switch (selectionScrollDir) {
case Up:
verticalScrollBar()->setValue(verticalScrollBar()->value() - scrollSpeed);
break;
case Down:
verticalScrollBar()->setValue(verticalScrollBar()->value() + scrollSpeed);
break;
default:
break;
}
}
void ChatLog::onWorkerTimeout()
{
// Fairly arbitrary but
// large values will make the UI unresponsive
const int stepSize = 50;
layout(workerLastIndex, workerLastIndex + stepSize, useableWidth());
workerLastIndex += stepSize;
// done?
if (workerLastIndex >= lines.size()) {
workerTimer->stop();
// switch back to the scene containing the chat messages
setScene(scene);
// make sure everything gets updated
updateSceneRect();
checkVisibility();
updateTypingNotification();
updateMultiSelectionRect();
// scroll
if (workerStb)
scrollToBottom();
else
scrollToLine(workerAnchorLine);
// don't keep a Ptr to the anchor line
workerAnchorLine = ChatLine::Ptr();
// hidden during busy screen
verticalScrollBar()->show();
emit workerTimeoutFinished();
}
}
void ChatLog::onMultiClickTimeout()
{
clickCount = 0;
}
void ChatLog::handleMultiClickEvent()
{
// Ignore single or double clicks
if (clickCount < 2)
return;
switch (clickCount) {
case 3:
QPointF scenePos = mapToScene(lastClickPos);
ChatLineContent* content = getContentFromPos(scenePos);
if (content) {
content->selectionTripleClick(scenePos);
selClickedCol = content->getColumn();
selClickedRow = content->getRow();
selFirstRow = content->getRow();
selLastRow = content->getRow();
selectionMode = Precise;
emit selectionChanged();
}
break;
}
}
void ChatLog::showEvent(QShowEvent*)
{
// Empty.
// The default implementation calls centerOn - for some reason - causing
// the scrollbar to move.
}
void ChatLog::focusInEvent(QFocusEvent* ev)
{
QGraphicsView::focusInEvent(ev);
if (selectionMode != None) {
selGraphItem->setBrush(QBrush(selectionRectColor));
for (int i = selFirstRow; i <= selLastRow; ++i)
lines[i]->selectionFocusChanged(true);
}
}
void ChatLog::focusOutEvent(QFocusEvent* ev)
{
QGraphicsView::focusOutEvent(ev);
if (selectionMode != None) {
selGraphItem->setBrush(QBrush(selectionRectColor.lighter(120)));
for (int i = selFirstRow; i <= selLastRow; ++i)
lines[i]->selectionFocusChanged(false);
}
}
void ChatLog::retranslateUi()
{
copyAction->setText(tr("Copy"));
selectAllAction->setText(tr("Select all"));
}
bool ChatLog::isActiveFileTransfer(ChatLine::Ptr l)
{
int count = l->getColumnCount();
for (int i = 0; i < count; ++i) {
ChatLineContent* content = l->getContent(i);
ChatLineContentProxy* proxy = qobject_cast<ChatLineContentProxy*>(content);
if (!proxy)
continue;
QWidget* widget = proxy->getWidget();
FileTransferWidget* transferWidget = qobject_cast<FileTransferWidget*>(widget);
if (transferWidget && transferWidget->isActive())
return true;
}
return false;
}
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