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transmission/qt/TorrentDelegate.cc

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// This file Copyright © 2009-2022 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 <utility>
#include <QApplication>
#include <QFont>
#include <QFontMetrics>
#include <QIcon>
#include <QModelIndex>
#include <QPainter>
#include <QPixmap>
#include <QPixmapCache>
#include <QStyleOptionProgressBar>
#include "Formatter.h"
#include "IconCache.h"
#include "Torrent.h"
#include "TorrentDelegate.h"
#include "TorrentModel.h"
#include "Utils.h"
enum
{
GUI_PAD = 6,
BAR_HEIGHT = 12
};
namespace
{
class ItemLayout
{
private:
QString name_text_;
QString status_text_;
QString progress_text_;
public:
QFont name_font;
QFont status_font;
QFont progress_font;
QRect icon_rect;
QRect emblem_rect;
QRect name_rect;
QRect status_rect;
QRect bar_rect;
QRect progress_rect;
ItemLayout(
QString name_text,
QString status_text,
QString progress_text,
QIcon const& emblem_icon,
QFont const& base_font,
Qt::LayoutDirection direction,
QPoint const& top_left,
int width);
[[nodiscard]] QSize size() const
{
return (icon_rect | name_rect | status_rect | bar_rect | progress_rect).size();
}
[[nodiscard]] QString nameText() const
{
return elidedText(name_font, name_text_, name_rect.width());
}
[[nodiscard]] QString statusText() const
{
return elidedText(status_font, status_text_, status_rect.width());
}
[[nodiscard]] QString progressText() const
{
return elidedText(progress_font, progress_text_, progress_rect.width());
}
private:
[[nodiscard]] QString elidedText(QFont const& font, QString const& text, int width) const
{
return QFontMetrics(font).elidedText(text, Qt::ElideRight, width);
}
};
ItemLayout::ItemLayout(
QString name_text,
QString status_text,
QString progress_text,
QIcon const& emblem_icon,
QFont const& base_font,
Qt::LayoutDirection direction,
QPoint const& top_left,
int width)
: name_text_(std::move(name_text))
, status_text_(std::move(status_text))
, progress_text_(std::move(progress_text))
, name_font(base_font)
, status_font(base_font)
, progress_font(base_font)
{
QStyle const* style = QApplication::style();
int const icon_size(style->pixelMetric(QStyle::PM_LargeIconSize));
name_font.setWeight(QFont::Bold);
QFontMetrics const name_fm(name_font);
QSize const name_size(name_fm.size(0, name_text_));
status_font.setPointSize(static_cast<int>(status_font.pointSize() * 0.9));
QFontMetrics const status_fm(status_font);
QSize const status_size(status_fm.size(0, status_text_));
progress_font.setPointSize(static_cast<int>(progress_font.pointSize() * 0.9));
QFontMetrics const progress_fm(progress_font);
QSize const progress_size(progress_fm.size(0, progress_text_));
QRect base_rect(top_left, QSize(width, 0));
Utils::narrowRect(base_rect, icon_size + GUI_PAD, 0, direction);
name_rect = base_rect.adjusted(0, 0, 0, name_size.height());
status_rect = name_rect.adjusted(0, name_rect.height() + 1, 0, status_size.height() + 1);
bar_rect = status_rect.adjusted(0, status_rect.height() + 1, 0, BAR_HEIGHT + 1);
progress_rect = bar_rect.adjusted(0, bar_rect.height() + 1, 0, progress_size.height() + 1);
icon_rect = QStyle::alignedRect(
direction,
Qt::AlignLeft | Qt::AlignVCenter,
QSize(icon_size, icon_size),
QRect(top_left, QSize(width, progress_rect.bottom() - name_rect.top())));
emblem_rect = QStyle::alignedRect(
direction,
Qt::AlignRight | Qt::AlignBottom,
emblem_icon.actualSize(icon_rect.size() / 2, QIcon::Normal, QIcon::On),
icon_rect);
}
} // namespace
TorrentDelegate::TorrentDelegate(QObject* parent)
: QStyledItemDelegate{ parent }
{
progress_bar_style_.minimum = 0;
progress_bar_style_.maximum = 1000;
}
/***
****
***/
QSize TorrentDelegate::margin(QStyle const& style) const
{
Q_UNUSED(style)
return { 4, 4 };
}
QString TorrentDelegate::progressString(Torrent const& tor)
{
bool const is_magnet(!tor.hasMetadata());
bool const is_done(tor.isDone());
bool const is_seed(tor.isSeed());
uint64_t const have_total(tor.haveTotal());
QString str;
auto const seed_ratio_limit = tor.getSeedRatioLimit();
if (is_magnet) // magnet link with no metadata
{
//: First part of torrent progress string,
//: %1 is the percentage of torrent metadata downloaded
str = tr("Magnetized transfer - retrieving metadata (%1%)")
.arg(Formatter::get().percentToString(tor.metadataPercentDone() * 100.0));
}
else if (!is_done) // downloading
{
//: First part of torrent progress string,
//: %1 is how much we've got,
//: %2 is how much we'll have when done,
//: %3 is a percentage of the two
str = tr("%1 of %2 (%3%)")
.arg(Formatter::get().sizeToString(have_total))
.arg(Formatter::get().sizeToString(tor.sizeWhenDone()))
.arg(Formatter::get().percentToString(tor.percentDone() * 100.0));
}
else if (!is_seed) // partial seed
{
if (seed_ratio_limit)
{
//: First part of torrent progress string,
//: %1 is how much we've got,
//: %2 is the torrent's total size,
//: %3 is a percentage of the two,
//: %4 is how much we've uploaded,
//: %5 is our upload-to-download ratio,
//: %6 is the ratio we want to reach before we stop uploading
str = tr("%1 of %2 (%3%), uploaded %4 (Ratio: %5 Goal: %6)")
.arg(Formatter::get().sizeToString(have_total))
.arg(Formatter::get().sizeToString(tor.totalSize()))
.arg(Formatter::get().percentToString(tor.percentComplete() * 100.0))
.arg(Formatter::get().sizeToString(tor.uploadedEver()))
.arg(Formatter::get().ratioToString(tor.ratio()))
.arg(Formatter::get().ratioToString(*seed_ratio_limit));
}
else
{
//: First part of torrent progress string,
//: %1 is how much we've got,
//: %2 is the torrent's total size,
//: %3 is a percentage of the two,
//: %4 is how much we've uploaded,
//: %5 is our upload-to-download ratio
str = tr("%1 of %2 (%3%), uploaded %4 (Ratio: %5)")
.arg(Formatter::get().sizeToString(have_total))
.arg(Formatter::get().sizeToString(tor.totalSize()))
.arg(Formatter::get().percentToString(tor.percentComplete() * 100.0))
.arg(Formatter::get().sizeToString(tor.uploadedEver()))
.arg(Formatter::get().ratioToString(tor.ratio()));
}
}
else // seeding
{
if (seed_ratio_limit)
{
//: First part of torrent progress string,
//: %1 is the torrent's total size,
//: %2 is how much we've uploaded,
//: %3 is our upload-to-download ratio,
//: %4 is the ratio we want to reach before we stop uploading
str = tr("%1, uploaded %2 (Ratio: %3 Goal: %4)")
.arg(Formatter::get().sizeToString(have_total))
.arg(Formatter::get().sizeToString(tor.uploadedEver()))
.arg(Formatter::get().ratioToString(tor.ratio()))
.arg(Formatter::get().ratioToString(*seed_ratio_limit));
}
else // seeding w/o a ratio
{
//: First part of torrent progress string,
//: %1 is the torrent's total size,
//: %2 is how much we've uploaded,
//: %3 is our upload-to-download ratio
str = tr("%1, uploaded %2 (Ratio: %3)")
.arg(Formatter::get().sizeToString(have_total))
.arg(Formatter::get().sizeToString(tor.uploadedEver()))
.arg(Formatter::get().ratioToString(tor.ratio()));
}
}
// add time when downloading
if ((seed_ratio_limit && tor.isSeeding()) || tor.isDownloading())
{
if (tor.hasETA())
{
//: Second (optional) part of torrent progress string,
//: %1 is duration,
//: notice that leading space (before the dash) is included here
str += tr(" - %1 left").arg(Formatter::get().timeToString(tor.getETA()));
}
else
{
//: Second (optional) part of torrent progress string,
//: notice that leading space (before the dash) is included here
str += tr(" - Remaining time unknown");
}
}
return str.trimmed();
}
QString TorrentDelegate::shortTransferString(Torrent const& tor)
{
QString str;
bool const have_meta(tor.hasMetadata());
bool const have_down(have_meta && ((tor.webseedsWeAreDownloadingFrom() > 0) || (tor.peersWeAreDownloadingFrom() > 0)));
bool const have_up(have_meta && tor.peersWeAreUploadingTo() > 0);
if (have_down)
{
str = Formatter::get().downloadSpeedToString(tor.downloadSpeed()) + QStringLiteral(" ") +
Formatter::get().uploadSpeedToString(tor.uploadSpeed());
}
else if (have_up)
{
str = Formatter::get().uploadSpeedToString(tor.uploadSpeed());
}
return str.trimmed();
}
QString TorrentDelegate::shortStatusString(Torrent const& tor)
{
QString str;
switch (tor.getActivity())
{
case TR_STATUS_CHECK:
str = tr("Verifying local data (%1% tested)").arg(Formatter::get().percentToString(tor.getVerifyProgress() * 100.0));
break;
case TR_STATUS_DOWNLOAD:
case TR_STATUS_SEED:
str = shortTransferString(tor) + QStringLiteral(" ") +
tr("Ratio: %1").arg(Formatter::get().ratioToString(tor.ratio()));
break;
default:
str = tor.activityString();
break;
}
return str.trimmed();
}
QString TorrentDelegate::statusString(Torrent const& tor)
{
QString str;
if (tor.hasError())
{
str = tor.getError();
}
else
{
switch (tor.getActivity())
{
case TR_STATUS_STOPPED:
case TR_STATUS_CHECK_WAIT:
case TR_STATUS_CHECK:
case TR_STATUS_DOWNLOAD_WAIT:
case TR_STATUS_SEED_WAIT:
str = shortStatusString(tor);
break;
case TR_STATUS_DOWNLOAD:
if (!tor.hasMetadata())
{
str = tr("Downloading metadata from %Ln peer(s) (%1% done)", nullptr, tor.peersWeAreDownloadingFrom())
.arg(Formatter::get().percentToString(100.0 * tor.metadataPercentDone()));
}
else
{
/* it would be nicer for translation if this was all one string, but I don't see how to do multiple %n's in
* tr() */
if (tor.connectedPeersAndWebseeds() == 0)
{
//: First part of phrase "Downloading from ... peer(s) and ... web seed(s)"
str = tr("Downloading from %Ln peer(s)", nullptr, tor.peersWeAreDownloadingFrom());
}
else
{
//: First part of phrase "Downloading from ... of ... connected peer(s) and ... web seed(s)"
str = tr("Downloading from %1 of %Ln connected peer(s)", nullptr, tor.connectedPeersAndWebseeds())
.arg(tor.peersWeAreDownloadingFrom());
}
if (tor.webseedsWeAreDownloadingFrom())
{
//: Second (optional) part of phrase "Downloading from ... of ... connected peer(s) and ... web seed(s)",
//: notice that leading space (before "and") is included here
str += tr(" and %Ln web seed(s)", nullptr, tor.webseedsWeAreDownloadingFrom());
}
}
break;
case TR_STATUS_SEED:
if (tor.connectedPeers() == 0)
{
str = tr("Seeding to %Ln peer(s)", nullptr, tor.peersWeAreUploadingTo());
}
else
{
str = tr("Seeding to %1 of %Ln connected peer(s)", nullptr, tor.connectedPeers())
.arg(tor.peersWeAreUploadingTo());
}
break;
}
}
if (tor.isReadyToTransfer())
{
QString const s = shortTransferString(tor);
if (!s.isEmpty())
{
str += tr(" - ") + s;
}
}
return str.trimmed();
}
/***
****
***/
QSize TorrentDelegate::sizeHint(QStyleOptionViewItem const& option, Torrent const& tor) const
{
auto const m = QSize(margin(*QApplication::style()));
auto const layout = ItemLayout(
tor.name(),
progressString(tor),
statusString(tor),
QIcon(),
option.font,
option.direction,
QPoint(0, 0),
option.rect.width() - m.width() * 2);
return layout.size() + m * 2;
}
QSize TorrentDelegate::sizeHint(QStyleOptionViewItem const& option, QModelIndex const& index) const
{
// if the font changed, invalidate the height cache
if (height_font_ != option.font)
{
height_font_ = option.font;
height_hint_.reset();
}
// ensure the height is cached
if (!height_hint_)
{
auto const* tor = index.data(TorrentModel::TorrentRole).value<Torrent const*>();
height_hint_ = sizeHint(option, *tor).height();
}
return { option.rect.width(), *height_hint_ };
}
QIcon& TorrentDelegate::getWarningEmblem() const
{
auto& icon = warning_emblem_;
if (icon.isNull())
{
icon = IconCache::get().getThemeIcon(QStringLiteral("emblem-important"), QStyle::SP_MessageBoxWarning);
}
return icon;
}
void TorrentDelegate::paint(QPainter* painter, QStyleOptionViewItem const& option, QModelIndex const& index) const
{
auto const* tor(index.data(TorrentModel::TorrentRole).value<Torrent const*>());
painter->save();
painter->setClipRect(option.rect);
drawTorrent(painter, option, *tor);
painter->restore();
}
void TorrentDelegate::setProgressBarPercentDone(QStyleOptionViewItem const& option, Torrent const& tor) const
{
auto const seed_ratio_limit = tor.getSeedRatioLimit();
if (tor.isSeeding() && seed_ratio_limit)
{
auto const seed_rate_ratio = tor.ratio() / *seed_ratio_limit;
auto const scaled_progress = static_cast<int>(
seed_rate_ratio * (progress_bar_style_.maximum - progress_bar_style_.minimum));
progress_bar_style_.progress = progress_bar_style_.minimum + scaled_progress;
}
else
{
bool const is_magnet(!tor.hasMetadata());
progress_bar_style_.direction = option.direction;
progress_bar_style_.progress = static_cast<int>(
progress_bar_style_.minimum +
(is_magnet ? tor.metadataPercentDone() : tor.percentDone()) *
(progress_bar_style_.maximum - progress_bar_style_.minimum));
}
}
void TorrentDelegate::drawTorrent(QPainter* painter, QStyleOptionViewItem const& option, Torrent const& tor) const
{
auto const* style = QApplication::style();
bool const is_paused(tor.isPaused());
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);
painter->save();
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));
}
auto icon_mode = QIcon::Mode{};
if (is_paused || !is_item_enabled)
{
icon_mode = QIcon::Disabled;
}
else if (is_item_selected)
{
icon_mode = QIcon::Selected;
}
else
{
icon_mode = QIcon::Normal;
}
auto const icon_state = is_paused ? QIcon::Off : QIcon::On;
auto color_group = QPalette::Normal;
if (is_paused || !is_item_enabled)
{
color_group = QPalette::Disabled;
}
if (color_group == QPalette::Normal && !is_item_active)
{
color_group = QPalette::Inactive;
}
auto const color_role = is_item_selected ? QPalette::HighlightedText : QPalette::Text;
QStyle::State progress_bar_state(option.state | QStyle::State_Horizontal);
if (is_paused)
{
progress_bar_state = QStyle::State_None;
}
progress_bar_state |= QStyle::State_Small;
QIcon::Mode const emblem_im = is_item_selected ? QIcon::Selected : QIcon::Normal;
QIcon const emblem_icon = tor.hasError() ? getWarningEmblem() : QIcon();
// layout
QSize const m(margin(*style));
QRect const content_rect(option.rect.adjusted(m.width(), m.height(), -m.width(), -m.height()));
ItemLayout const layout(
tor.name(),
progressString(tor),
statusString(tor),
emblem_icon,
option.font,
option.direction,
content_rect.topLeft(),
content_rect.width());
// render
if (tor.hasError() && !is_item_selected)
{
painter->setPen(QColor("red"));
}
else
{
painter->setPen(option.palette.color(color_group, color_role));
}
tor.getMimeTypeIcon().paint(painter, layout.icon_rect, Qt::AlignCenter, icon_mode, icon_state);
if (!emblem_icon.isNull())
{
emblem_icon.paint(painter, layout.emblem_rect, Qt::AlignCenter, emblem_im, icon_state);
}
painter->setFont(layout.name_font);
painter->drawText(layout.name_rect, Qt::AlignLeft | Qt::AlignVCenter, layout.nameText());
painter->setFont(layout.status_font);
painter->drawText(layout.status_rect, Qt::AlignLeft | Qt::AlignVCenter, layout.statusText());
painter->setFont(layout.progress_font);
painter->drawText(layout.progress_rect, Qt::AlignLeft | Qt::AlignVCenter, layout.progressText());
progress_bar_style_.rect = layout.bar_rect;
if (tor.isDownloading())
{
progress_bar_style_.palette.setBrush(QPalette::Highlight, BlueBrush);
progress_bar_style_.palette.setColor(QPalette::Base, BlueBack);
progress_bar_style_.palette.setColor(QPalette::Window, BlueBack);
}
else if (tor.isSeeding())
{
progress_bar_style_.palette.setBrush(QPalette::Highlight, GreenBrush);
progress_bar_style_.palette.setColor(QPalette::Base, GreenBack);
progress_bar_style_.palette.setColor(QPalette::Window, GreenBack);
}
else
{
progress_bar_style_.palette.setBrush(QPalette::Highlight, SilverBrush);
progress_bar_style_.palette.setColor(QPalette::Base, SilverBack);
progress_bar_style_.palette.setColor(QPalette::Window, SilverBack);
}
progress_bar_style_.state = progress_bar_state;
setProgressBarPercentDone(option, tor);
style->drawControl(QStyle::CE_ProgressBar, &progress_bar_style_, painter);
painter->restore();
}
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