transmission/qt/TrackerDelegate.cc

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// This file Copyright © 2009-2023 Mnemosyne LLC.
// It may be used under GPLv2 (SPDX: GPL-2.0-only), GPLv3 (SPDX: GPL-3.0-only),
// or any future license endorsed by Mnemosyne LLC.
// License text can be found in the licenses/ folder.
#include <QAbstractTextDocumentLayout>
#include <QApplication>
#include <QPainter>
#include <QPixmap>
#include <QTextDocument>
#include <libtransmission/web-utils.h>
#include <libtransmission/favicon-cache.h>
#include "Formatter.h"
#include "Torrent.h"
#include "TrackerDelegate.h"
#include "TrackerModel.h"
#include "Utils.h"
/***
****
***/
namespace
{
auto constexpr Spacing = int{ 6 };
auto constexpr Margin = QSize{ 10, 10 };
class ItemLayout
{
public:
QRect icon_rect;
QRect text_rect;
ItemLayout(QString const& text, bool suppress_colors, Qt::LayoutDirection direction, QPoint const& top_left, int width);
[[nodiscard]] QSize size() const
{
return (icon_rect | text_rect).size();
}
[[nodiscard]] QAbstractTextDocumentLayout* textLayout() const
{
return text_document_.documentLayout();
}
private:
QTextDocument text_document_;
};
ItemLayout::ItemLayout(
QString const& text,
bool suppress_colors,
Qt::LayoutDirection direction,
QPoint const& top_left,
int width)
{
auto const icon_size = QSize{ FaviconCache<QPixmap>::Width, FaviconCache<QPixmap>::Height };
QRect base_rect{ top_left, QSize{ width, 0 } };
icon_rect = QStyle::alignedRect(direction, Qt::AlignLeft | Qt::AlignTop, icon_size, base_rect);
Utils::narrowRect(base_rect, icon_size.width() + Spacing, 0, direction);
text_document_.setDocumentMargin(0);
text_document_.setTextWidth(base_rect.width());
QTextOption text_option;
text_option.setTextDirection(direction);
if (suppress_colors)
{
text_option.setFlags(QTextOption::SuppressColors);
}
text_document_.setDefaultTextOption(text_option);
text_document_.setHtml(text);
text_rect = base_rect;
text_rect.setSize(text_document_.size().toSize());
}
} // namespace
/***
****
***/
QSize TrackerDelegate::sizeHint(QStyleOptionViewItem const& option, TrackerInfo const& info) const
{
ItemLayout const layout{ getText(info), true, option.direction, QPoint(0, 0), option.rect.width() - Margin.width() * 2 };
return layout.size() + Margin * 2;
}
QSize TrackerDelegate::sizeHint(QStyleOptionViewItem const& option, QModelIndex const& index) const
{
auto const tracker_info = index.data(TrackerModel::TrackerRole).value<TrackerInfo>();
return sizeHint(option, tracker_info);
}
void TrackerDelegate::paint(QPainter* painter, QStyleOptionViewItem const& option, QModelIndex const& index) const
{
auto const tracker_info = index.data(TrackerModel::TrackerRole).value<TrackerInfo>();
painter->save();
painter->setClipRect(option.rect);
drawBackground(painter, option, index);
drawTracker(painter, option, tracker_info);
drawFocus(painter, option, option.rect);
painter->restore();
}
void TrackerDelegate::drawTracker(QPainter* painter, QStyleOptionViewItem const& option, TrackerInfo const& inf) const
{
bool const is_item_selected((option.state & QStyle::State_Selected) != 0);
bool const is_item_enabled((option.state & QStyle::State_Enabled) != 0);
bool const is_item_active((option.state & QStyle::State_Active) != 0);
QIcon const tracker_icon(inf.st.getFavicon());
QRect const content_rect(option.rect.adjusted(Margin.width(), Margin.height(), -Margin.width(), -Margin.height()));
ItemLayout const layout(getText(inf), is_item_selected, option.direction, content_rect.topLeft(), content_rect.width());
painter->save();
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if (is_item_selected)
{
QPalette::ColorGroup cg = is_item_enabled ? QPalette::Normal : QPalette::Disabled;
if (cg == QPalette::Normal && !is_item_active)
{
cg = QPalette::Inactive;
}
painter->fillRect(option.rect, option.palette.brush(cg, QPalette::Highlight));
}
tracker_icon
.paint(painter, layout.icon_rect, Qt::AlignCenter, is_item_selected ? QIcon::Selected : QIcon::Normal, QIcon::On);
QAbstractTextDocumentLayout::PaintContext paint_context;
paint_context.clip = layout.text_rect.translated(-layout.text_rect.topLeft());
paint_context.palette.setColor(
QPalette::Text,
option.palette.color(is_item_selected ? QPalette::HighlightedText : QPalette::Text));
painter->translate(layout.text_rect.topLeft());
layout.textLayout()->draw(painter, paint_context);
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painter->restore();
}
void TrackerDelegate::setShowMore(bool b)
{
show_more_ = b;
}
namespace
{
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QString timeToStringRounded(int seconds)
{
if (seconds > 60)
{
seconds -= seconds % 60;
}
return Formatter::get().timeToString(seconds);
}
} // namespace
QString TrackerDelegate::getText(TrackerInfo const& inf) const
{
QString str;
auto const err_markup_begin = QStringLiteral("<span style=\"color:red\">");
auto const err_markup_end = QStringLiteral("</span>");
auto const timeout_markup_begin = QStringLiteral("<span style=\"color:#224466\">");
auto const timeout_markup_end = QStringLiteral("</span>");
auto const success_markup_begin = QStringLiteral("<span style=\"color:#008B00\">");
auto const success_markup_end = QStringLiteral("</span>");
auto const now = time(nullptr);
auto const time_until = [&now](auto t)
{
return timeToStringRounded(static_cast<int>(t - now));
};
auto const time_since = [&now](auto t)
{
return timeToStringRounded(static_cast<int>(now - t));
};
// hostname
str += inf.st.is_backup ? QStringLiteral("<i>") : QStringLiteral("<b>");
auto const announce_url = inf.st.announce.toStdString();
if (auto const parsed = tr_urlParse(announce_url); parsed)
{
str += QStringLiteral("%1:%2")
.arg(QString::fromUtf8(std::data(parsed->host), std::size(parsed->host)))
.arg(parsed->port);
}
str += inf.st.is_backup ? QStringLiteral("</i>") : QStringLiteral("</b>");
// announce & scrape info
if (!inf.st.is_backup)
{
if (inf.st.has_announced && inf.st.announce_state != TR_TRACKER_INACTIVE)
{
auto const tstr = time_since(inf.st.last_announce_time);
str += QStringLiteral("<br/>\n");
if (inf.st.last_announce_succeeded)
{
//: %1 and %2 are replaced with HTML markup, %3 is duration
str += tr("Got a list of%1 %Ln peer(s)%2 %3 ago", nullptr, inf.st.last_announce_peer_count)
.arg(success_markup_begin)
.arg(success_markup_end)
.arg(tstr);
}
else if (inf.st.last_announce_timed_out)
{
//: %1 and %2 are replaced with HTML markup, %3 is duration
str += tr("Peer list request %1timed out%2 %3 ago; will retry")
.arg(timeout_markup_begin)
.arg(timeout_markup_end)
.arg(tstr);
}
else
{
//: %1 and %3 are replaced with HTML markup, %2 is error message, %4 is duration
str += tr("Got an error %1\"%2\"%3 %4 ago")
.arg(err_markup_begin)
.arg(inf.st.last_announce_result)
.arg(err_markup_end)
.arg(tstr);
}
}
switch (inf.st.announce_state)
{
case TR_TRACKER_INACTIVE:
str += QStringLiteral("<br/>\n");
str += tr("No updates scheduled");
break;
case TR_TRACKER_WAITING:
str += QStringLiteral("<br/>\n");
//: %1 is duration
str += tr("Asking for more peers in %1").arg(time_until(inf.st.next_announce_time));
break;
case TR_TRACKER_QUEUED:
str += QStringLiteral("<br/>\n");
str += tr("Queued to ask for more peers");
break;
case TR_TRACKER_ACTIVE:
str += QStringLiteral("<br/>\n");
//: %1 is duration
str += tr("Asking for more peers now… <small>%1</small>").arg(time_since(inf.st.last_announce_start_time));
break;
}
if (!show_more_)
{
return str;
}
if (inf.st.has_scraped)
{
str += QStringLiteral("<br/>\n");
auto const tstr = time_since(inf.st.last_scrape_time);
if (!inf.st.last_scrape_succeeded)
{
//: %1 and %3 are replaced with HTML markup, %2 is error message, %4 is duration
str += tr("Got a scrape error %1\"%2\"%3 %4 ago")
.arg(err_markup_begin)
.arg(inf.st.last_scrape_result)
.arg(err_markup_end)
.arg(tstr);
}
else if (inf.st.seeder_count >= 0 && inf.st.leecher_count >= 0)
{
//: First part of phrase "Tracker had ... seeder(s) and ... leecher(s) ... ago",
//: %1 and %2 are replaced with HTML markup
str += tr("Tracker had%1 %Ln seeder(s)%2", nullptr, inf.st.seeder_count)
.arg(success_markup_begin)
.arg(success_markup_end);
//: Second part of phrase "Tracker had ... seeder(s) and ... leecher(s) ... ago",
//: %1 and %2 are replaced with HTML markup, %3 is duration;
//: notice that leading space (before "and") is included here
str += tr(" and%1 %Ln leecher(s)%2 %3 ago", nullptr, inf.st.leecher_count)
.arg(success_markup_begin)
.arg(success_markup_end)
.arg(tstr);
}
else
{
//: %1 and %2 are replaced with HTML markup, %3 is duration
str += tr("Tracker had %1no information%2 on peer counts %3 ago")
.arg(success_markup_begin)
.arg(success_markup_end)
.arg(tstr);
}
}
switch (inf.st.scrape_state)
{
case TR_TRACKER_INACTIVE:
break;
case TR_TRACKER_WAITING:
str += QStringLiteral("<br/>\n");
//: %1 is duration
str += tr("Asking for peer counts in %1").arg(time_until(inf.st.next_scrape_time));
break;
case TR_TRACKER_QUEUED:
str += QStringLiteral("<br/>\n");
str += tr("Queued to ask for peer counts");
break;
case TR_TRACKER_ACTIVE:
str += QStringLiteral("<br/>\n");
//: %1 is duration
str += tr("Asking for peer counts now… <small>%1</small>").arg(time_since(inf.st.last_scrape_start_time));
break;
}
}
return str;
}