squawk/ui/widgets/messageline/messagedelegate.cpp

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/*
* Squawk messenger.
* Copyright (C) 2019 Yury Gubich <blue@macaw.me>
*
* This program is free 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.
*
* This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <QDebug>
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#include <QPainter>
#include <QApplication>
#include <QMouseEvent>
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#include "messagedelegate.h"
#include "messagefeed.h"
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constexpr int avatarHeight = 50;
constexpr int margin = 6;
constexpr int textMargin = 2;
constexpr int statusIconSize = 16;
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MessageDelegate::MessageDelegate(QObject* parent):
QStyledItemDelegate(parent),
bodyFont(),
nickFont(),
dateFont(),
bodyMetrics(bodyFont),
nickMetrics(nickFont),
dateMetrics(dateFont),
buttonHeight(0),
barHeight(0),
buttons(new std::map<QString, FeedButton*>()),
bars(new std::map<QString, QProgressBar*>()),
statusIcons(new std::map<QString, QLabel*>()),
pencilIcons(new std::map<QString, QLabel*>()),
bodies(new std::map<QString, QLabel*>()),
previews(new std::map<QString, Preview*>()),
idsToKeep(new std::set<QString>()),
clearingWidgets(false)
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{
QPushButton btn;
buttonHeight = btn.sizeHint().height();
QProgressBar bar;
barHeight = bar.sizeHint().height();
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}
MessageDelegate::~MessageDelegate()
{
for (const std::pair<const QString, FeedButton*>& pair: *buttons){
delete pair.second;
}
for (const std::pair<const QString, QProgressBar*>& pair: *bars){
delete pair.second;
}
for (const std::pair<const QString, QLabel*>& pair: *statusIcons){
delete pair.second;
}
for (const std::pair<const QString, QLabel*>& pair: *pencilIcons){
delete pair.second;
}
for (const std::pair<const QString, QLabel*>& pair: *bodies){
delete pair.second;
}
for (const std::pair<const QString, Preview*>& pair: *previews){
delete pair.second;
}
delete statusIcons;
delete pencilIcons;
delete idsToKeep;
delete buttons;
delete bars;
delete bodies;
delete previews;
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}
void MessageDelegate::paint(QPainter* painter, const QStyleOptionViewItem& option, const QModelIndex& index) const
{
QVariant vi = index.data(Models::MessageFeed::Bulk);
if (!vi.isValid()) {
return;
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}
Models::FeedItem data = qvariant_cast<Models::FeedItem>(vi);
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painter->save();
painter->setRenderHint(QPainter::Antialiasing, true);
if (option.state & QStyle::State_MouseOver) {
painter->fillRect(option.rect, option.palette.brush(QPalette::Inactive, QPalette::Highlight));
}
QIcon icon(data.avatar);
if (data.sentByMe) {
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painter->drawPixmap(option.rect.width() - avatarHeight - margin, option.rect.y() + margin / 2, icon.pixmap(avatarHeight, avatarHeight));
} else {
painter->drawPixmap(margin, option.rect.y() + margin / 2, icon.pixmap(avatarHeight, avatarHeight));
}
QStyleOptionViewItem opt = option;
QRect messageRect = option.rect.adjusted(margin, margin / 2, -(avatarHeight + 2 * margin), -margin / 2);
if (!data.sentByMe) {
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opt.displayAlignment = Qt::AlignLeft | Qt::AlignTop;
messageRect.adjust(avatarHeight + margin, 0, avatarHeight + margin, 0);
} else {
opt.displayAlignment = Qt::AlignRight | Qt::AlignTop;
}
opt.rect = messageRect;
QSize messageSize(0, 0);
QSize bodySize(0, 0);
if (data.text.size() > 0) {
messageSize = bodyMetrics.boundingRect(messageRect, Qt::TextWordWrap, data.text).size();
bodySize = messageSize;
}
messageSize.rheight() += nickMetrics.lineSpacing();
messageSize.rheight() += dateMetrics.height();
QString dateString = data.date.toLocalTime().toString("hh:mm");
if (messageSize.width() < opt.rect.width()) {
QSize senderSize = nickMetrics.boundingRect(messageRect, 0, data.sender).size();
if (senderSize.width() > messageSize.width()) {
messageSize.setWidth(senderSize.width());
}
QSize dateSize = dateMetrics.boundingRect(messageRect, 0, dateString).size();
int addition = 0;
if (data.correction.corrected) {
addition += margin + statusIconSize;
}
if (data.sentByMe) {
addition += margin + statusIconSize;
}
if (dateSize.width() + addition > messageSize.width()) {
messageSize.setWidth(dateSize.width() + addition);
}
} else {
messageSize.setWidth(opt.rect.width());
}
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QRect rect;
painter->setFont(nickFont);
painter->drawText(opt.rect, opt.displayAlignment, data.sender, &rect);
opt.rect.adjust(0, rect.height() + textMargin, 0, 0);
painter->save();
switch (data.attach.state) {
case Models::none:
clearHelperWidget(data); //i can't imagine the situation where it's gonna be needed
break; //but it's a possible performance problem
case Models::uploading:
paintPreview(data, painter, opt);
case Models::downloading:
paintBar(getBar(data), painter, data.sentByMe, opt);
break;
case Models::remote:
paintButton(getButton(data), painter, data.sentByMe, opt);
break;
case Models::ready:
case Models::local:
clearHelperWidget(data);
paintPreview(data, painter, opt);
break;
case Models::errorDownload: {
paintButton(getButton(data), painter, data.sentByMe, opt);
paintComment(data, painter, opt);
}
break;
case Models::errorUpload:{
clearHelperWidget(data);
paintPreview(data, painter, opt);
paintComment(data, painter, opt);
}
break;
}
painter->restore();
int messageLeft = INT16_MAX;
int messageRight = opt.rect.x() + messageSize.width();
QWidget* vp = static_cast<QWidget*>(painter->device());
if (data.text.size() > 0) {
QLabel* body = getBody(data);
body->setParent(vp);
body->setMaximumWidth(bodySize.width());
body->setMinimumWidth(bodySize.width());
body->setMinimumHeight(bodySize.height());
body->setMaximumHeight(bodySize.height());
body->setAlignment(opt.displayAlignment);
messageLeft = opt.rect.x();
if (data.sentByMe) {
messageLeft = opt.rect.topRight().x() - bodySize.width();
}
body->move(messageLeft, opt.rect.y());
body->show();
opt.rect.adjust(0, bodySize.height() + textMargin, 0, 0);
}
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painter->setFont(dateFont);
QColor q = painter->pen().color();
q.setAlpha(180);
painter->setPen(q);
painter->drawText(opt.rect, opt.displayAlignment, dateString, &rect);
int currentY = opt.rect.y();
if (data.sentByMe) {
QLabel* statusIcon = getStatusIcon(data);
statusIcon->setParent(vp);
statusIcon->move(opt.rect.topRight().x() - messageSize.width(), currentY);
statusIcon->show();
opt.rect.adjust(0, statusIconSize + textMargin, 0, 0);
}
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if (data.correction.corrected) {
QLabel* pencilIcon = getPencilIcon(data);
pencilIcon->setParent(vp);
if (data.sentByMe) {
pencilIcon->move(opt.rect.topRight().x() - messageSize.width() + statusIconSize + margin, currentY);
} else {
pencilIcon->move(messageRight - statusIconSize - margin, currentY);
}
pencilIcon->show();
} else {
std::map<QString, QLabel*>::const_iterator itr = pencilIcons->find(data.id);
if (itr != pencilIcons->end()) {
delete itr->second;
pencilIcons->erase(itr);
}
}
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painter->restore();
if (clearingWidgets) {
idsToKeep->insert(data.id);
}
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}
QSize MessageDelegate::sizeHint(const QStyleOptionViewItem& option, const QModelIndex& index) const
{
QRect messageRect = option.rect.adjusted(0, margin / 2, -(avatarHeight + 3 * margin), -margin / 2);
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QStyleOptionViewItem opt = option;
opt.rect = messageRect;
QVariant va = index.data(Models::MessageFeed::Attach);
Models::Attachment attach = qvariant_cast<Models::Attachment>(va);
QString body = index.data(Models::MessageFeed::Text).toString();
QSize messageSize(0, 0);
if (body.size() > 0) {
messageSize = bodyMetrics.boundingRect(messageRect, Qt::TextWordWrap, body).size();
messageSize.rheight() += textMargin;
}
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switch (attach.state) {
case Models::none:
break;
case Models::uploading:
messageSize.rheight() += Preview::calculateAttachSize(attach.localPath, messageRect).height() + textMargin;
case Models::downloading:
messageSize.rheight() += barHeight + textMargin;
break;
case Models::remote:
messageSize.rheight() += buttonHeight + textMargin;
break;
case Models::ready:
case Models::local:
messageSize.rheight() += Preview::calculateAttachSize(attach.localPath, messageRect).height() + textMargin;
break;
case Models::errorDownload:
messageSize.rheight() += buttonHeight + textMargin;
messageSize.rheight() += dateMetrics.boundingRect(messageRect, Qt::TextWordWrap, attach.error).size().height() + textMargin;
break;
case Models::errorUpload:
messageSize.rheight() += Preview::calculateAttachSize(attach.localPath, messageRect).height() + textMargin;
messageSize.rheight() += dateMetrics.boundingRect(messageRect, Qt::TextWordWrap, attach.error).size().height() + textMargin;
break;
}
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messageSize.rheight() += nickMetrics.lineSpacing();
messageSize.rheight() += textMargin;
messageSize.rheight() += dateMetrics.height() > statusIconSize ? dateMetrics.height() : statusIconSize;
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if (messageSize.height() < avatarHeight) {
messageSize.setHeight(avatarHeight);
}
messageSize.rheight() += margin;
return messageSize;
}
void MessageDelegate::initializeFonts(const QFont& font)
{
bodyFont = font;
nickFont = font;
dateFont = font;
nickFont.setBold(true);
float ndps = nickFont.pointSizeF();
if (ndps != -1) {
nickFont.setPointSizeF(ndps * 1.2);
} else {
nickFont.setPointSize(nickFont.pointSize() + 2);
}
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dateFont.setItalic(true);
float dps = dateFont.pointSizeF();
if (dps != -1) {
dateFont.setPointSizeF(dps * 0.8);
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} else {
dateFont.setPointSize(dateFont.pointSize() - 2);
}
bodyMetrics = QFontMetrics(bodyFont);
nickMetrics = QFontMetrics(nickFont);
dateMetrics = QFontMetrics(dateFont);
Preview::initializeFont(bodyFont);
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}
bool MessageDelegate::editorEvent(QEvent* event, QAbstractItemModel* model, const QStyleOptionViewItem& option, const QModelIndex& index)
{
//qDebug() << event->type();
return QStyledItemDelegate::editorEvent(event, model, option, index);
}
void MessageDelegate::paintButton(QPushButton* btn, QPainter* painter, bool sentByMe, QStyleOptionViewItem& option) const
{
QPoint start;
if (sentByMe) {
start = {option.rect.width() - btn->width(), option.rect.top()};
} else {
start = option.rect.topLeft();
}
QWidget* vp = static_cast<QWidget*>(painter->device());
btn->setParent(vp);
btn->move(start);
btn->show();
option.rect.adjust(0, buttonHeight + textMargin, 0, 0);
}
void MessageDelegate::paintComment(const Models::FeedItem& data, QPainter* painter, QStyleOptionViewItem& option) const
{
painter->setFont(dateFont);
QColor q = painter->pen().color();
q.setAlpha(180);
painter->setPen(q);
QRect rect;
painter->drawText(option.rect, option.displayAlignment, data.attach.error, &rect);
option.rect.adjust(0, rect.height() + textMargin, 0, 0);
}
void MessageDelegate::paintBar(QProgressBar* bar, QPainter* painter, bool sentByMe, QStyleOptionViewItem& option) const
{
QPoint start = option.rect.topLeft();
bar->resize(option.rect.width(), barHeight);
painter->translate(start);
bar->render(painter, QPoint(), QRegion(), QWidget::DrawChildren);
option.rect.adjust(0, barHeight + textMargin, 0, 0);
}
void MessageDelegate::paintPreview(const Models::FeedItem& data, QPainter* painter, QStyleOptionViewItem& option) const
{
Preview* preview = 0;
std::map<QString, Preview*>::iterator itr = previews->find(data.id);
QSize size = option.rect.size();
if (itr != previews->end()) {
preview = itr->second;
preview->actualize(data.attach.localPath, size, option.rect.topLeft());
} else {
QWidget* vp = static_cast<QWidget*>(painter->device());
preview = new Preview(data.attach.localPath, size, option.rect.topLeft(), data.sentByMe, vp);
previews->insert(std::make_pair(data.id, preview));
}
if (!preview->isFileReachable()) { //this is the situation when the file preview couldn't be painted because the file was moved
emit invalidPath(data.id); //or deleted. This signal notifies the model, and the model notifies the core, preview can
} //handle being invalid for as long as I need and can be even become valid again with a new path
option.rect.adjust(0, preview->size().height() + textMargin, 0, 0);
}
QPushButton * MessageDelegate::getButton(const Models::FeedItem& data) const
{
std::map<QString, FeedButton*>::const_iterator itr = buttons->find(data.id);
FeedButton* result = 0;
if (itr != buttons->end()) {
result = itr->second;
} else {
std::map<QString, QProgressBar*>::const_iterator barItr = bars->find(data.id);
if (barItr != bars->end()) {
delete barItr->second;
bars->erase(barItr);
}
}
if (result == 0) {
result = new FeedButton();
result->messageId = data.id;
result->setText(QCoreApplication::translate("MessageLine", "Download"));
buttons->insert(std::make_pair(data.id, result));
connect(result, &QPushButton::clicked, this, &MessageDelegate::onButtonPushed);
}
return result;
}
QProgressBar * MessageDelegate::getBar(const Models::FeedItem& data) const
{
std::map<QString, QProgressBar*>::const_iterator barItr = bars->find(data.id);
QProgressBar* result = 0;
if (barItr != bars->end()) {
result = barItr->second;
} else {
std::map<QString, FeedButton*>::const_iterator itr = buttons->find(data.id);
if (itr != buttons->end()) {
delete itr->second;
buttons->erase(itr);
}
}
if (result == 0) {
result = new QProgressBar();
result->setRange(0, 100);
bars->insert(std::make_pair(data.id, result));
}
result->setValue(data.attach.progress * 100);
return result;
}
QLabel * MessageDelegate::getStatusIcon(const Models::FeedItem& data) const
{
std::map<QString, QLabel*>::const_iterator itr = statusIcons->find(data.id);
QLabel* result = 0;
if (itr != statusIcons->end()) {
result = itr->second;
} else {
result = new QLabel();
statusIcons->insert(std::make_pair(data.id, result));
}
QIcon q(Shared::icon(Shared::messageStateThemeIcons[static_cast<uint8_t>(data.state)]));
QString tt = Shared::Global::getName(data.state);
if (data.state == Shared::Message::State::error) {
if (data.error > 0) {
tt += ": " + data.error;
}
}
if (result->toolTip() != tt) { //If i just assign pixmap every time unconditionally
result->setPixmap(q.pixmap(statusIconSize)); //it invokes an infinite cycle of repaint
result->setToolTip(tt); //may be it's better to subclass and store last condition in int?
}
return result;
}
QLabel * MessageDelegate::getPencilIcon(const Models::FeedItem& data) const
{
std::map<QString, QLabel*>::const_iterator itr = pencilIcons->find(data.id);
QLabel* result = 0;
if (itr != pencilIcons->end()) {
result = itr->second;
} else {
result = new QLabel();
QIcon icon = Shared::icon("edit-rename");
result->setPixmap(icon.pixmap(statusIconSize));
pencilIcons->insert(std::make_pair(data.id, result));
}
result->setToolTip("Last time edited: " + data.correction.lastCorrection.toLocalTime().toString()
+ "\nOriginal message: " + data.correction.original);
return result;
}
QLabel * MessageDelegate::getBody(const Models::FeedItem& data) const
{
std::map<QString, QLabel*>::const_iterator itr = bodies->find(data.id);
QLabel* result = 0;
if (itr != bodies->end()) {
result = itr->second;
} else {
result = new QLabel();
result->setFont(bodyFont);
result->setWordWrap(true);
result->setOpenExternalLinks(true);
result->setTextInteractionFlags(result->textInteractionFlags() | Qt::TextSelectableByMouse | Qt::LinksAccessibleByMouse);
bodies->insert(std::make_pair(data.id, result));
}
result->setText(Shared::processMessageBody(data.text));
return result;
}
void MessageDelegate::beginClearWidgets()
{
idsToKeep->clear();
clearingWidgets = true;
}
template <typename T>
void removeElements(std::map<QString, T*>* elements, std::set<QString>* idsToKeep) {
std::set<QString> toRemove;
for (const std::pair<const QString, T*>& pair: *elements) {
if (idsToKeep->find(pair.first) == idsToKeep->end()) {
delete pair.second;
toRemove.insert(pair.first);
}
}
for (const QString& key : toRemove) {
elements->erase(key);
}
}
void MessageDelegate::endClearWidgets()
{
if (clearingWidgets) {
removeElements(buttons, idsToKeep);
removeElements(bars, idsToKeep);
removeElements(statusIcons, idsToKeep);
removeElements(pencilIcons, idsToKeep);
removeElements(bodies, idsToKeep);
removeElements(previews, idsToKeep);
idsToKeep->clear();
clearingWidgets = false;
}
}
void MessageDelegate::onButtonPushed() const
{
FeedButton* btn = static_cast<FeedButton*>(sender());
emit buttonPushed(btn->messageId);
}
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void MessageDelegate::clearHelperWidget(const Models::FeedItem& data) const
{
std::map<QString, FeedButton*>::const_iterator itr = buttons->find(data.id);
if (itr != buttons->end()) {
delete itr->second;
buttons->erase(itr);
} else {
std::map<QString, QProgressBar*>::const_iterator barItr = bars->find(data.id);
if (barItr != bars->end()) {
delete barItr->second;
bars->erase(barItr);
}
}
}
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// void MessageDelegate::setModelData(QWidget* editor, QAbstractItemModel* model, const QModelIndex& index) const
// {
//
// }