src/gui/utils.cpp

   1 /*
   2  * Bittorrent Client using Qt and libtorrent.
   3  * Copyright (C) 2017  Mike Tzou
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public License
   7  * as published by the Free Software Foundation; either version 2
   8  * of the License, or (at your option) any later version.
   9  *
  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.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
  18  *
  19  * In addition, as a special exception, the copyright holders give permission to
  20  * link this program with the OpenSSL project's "OpenSSL" library (or with
  21  * modified versions of it that use the same license as the "OpenSSL" library),
  22  * and distribute the linked executables. You must obey the GNU General Public
  23  * License in all respects for all of the code used other than "OpenSSL".  If you
  24  * modify file(s), you may extend this exception to your version of the file(s),
  25  * but you are not obligated to do so. If you do not wish to do so, delete this
  26  * exception statement from your version.
  27  */
  28
  29 #include "utils.h"
  30
  31 #include <QtSystemDetection>
  32
  33 #ifdef Q_OS_WIN
  34 #include <objbase.h>
  35 #include <shlobj.h>
  36 #include <shellapi.h>
  37 #endif
  38
  39 #include <QApplication>
  40 #include <QDesktopServices>
  41 #include <QIcon>
  42 #include <QPixmap>
  43 #include <QPixmapCache>
  44 #include <QPoint>
  45 #include <QProcess>
  46 #include <QRegularExpression>
  47 #include <QScreen>
  48 #include <QSize>
  49 #include <QStyle>
  50 #include <QThread>
  51 #include <QUrl>
  52 #include <QWidget>
  53 #include <QWindow>
  54
  55 #include "base/global.h"
  56 #include "base/path.h"
  57 #include "base/utils/fs.h"
  58 #include "base/utils/version.h"
  59
  60 QPixmap Utils::Gui::scaledPixmap(const QIcon &icon, const int height)
  61 {
  62     Q_ASSERT(height > 0);
  63
  64     return icon.pixmap(height);
  65 }
  66
  67 QPixmap Utils::Gui::scaledPixmap(const Path &path, const int height)
  68 {
  69     Q_ASSERT(height >= 0);
  70
  71     const QPixmap pixmap {path.data()};
  72     return (height == 0) ? pixmap : pixmap.scaledToHeight(height, Qt::SmoothTransformation);
  73 }
  74
  75 QSize Utils::Gui::smallIconSize(const QWidget *widget)
  76 {
  77     // Get DPI scaled icon size (device-dependent), see QT source
  78     // under a 1080p screen is usually 16x16
  79     const int s = QApplication::style()->pixelMetric(QStyle::PM_SmallIconSize, nullptr, widget);
  80     return {s, s};
  81 }
  82
  83 QSize Utils::Gui::mediumIconSize(const QWidget *widget)
  84 {
  85     // under a 1080p screen is usually 24x24
  86     return ((smallIconSize(widget) + largeIconSize(widget)) / 2);
  87 }
  88
  89 QSize Utils::Gui::largeIconSize(const QWidget *widget)
  90 {
  91     // Get DPI scaled icon size (device-dependent), see QT source
  92     // under a 1080p screen is usually 32x32
  93     const int s = QApplication::style()->pixelMetric(QStyle::PM_LargeIconSize, nullptr, widget);
  94     return {s, s};
  95 }
  96
  97 QPoint Utils::Gui::screenCenter(const QWidget *w)
  98 {
  99     // Returns the QPoint which the widget will be placed center on screen (where parent resides)
 100
 101     if (!w)
 102         return {};
 103
 104     QRect r = QGuiApplication::primaryScreen()->availableGeometry();
 105     const QPoint primaryScreenCenter {(r.x() + (r.width() - w->frameSize().width()) / 2), (r.y() + (r.height() - w->frameSize().height()) / 2)};
 106
 107     const QWidget *parent = w->parentWidget();
 108     if (!parent)
 109         return primaryScreenCenter;
 110
 111     const QWindow *window = parent->window()->windowHandle();
 112     if (!window)
 113         return primaryScreenCenter;
 114
 115     const QScreen *screen = window->screen();
 116     if (!screen)
 117         return primaryScreenCenter;
 118
 119     r = screen->availableGeometry();
 120     return {(r.x() + (r.width() - w->frameSize().width()) / 2), (r.y() + (r.height() - w->frameSize().height()) / 2)};
 121 }
 122
 123 // Open the given path with an appropriate application
 124 void Utils::Gui::openPath(const Path &path)
 125 {
 126     // Hack to access samba shares with QDesktopServices::openUrl
 127     const QUrl url = path.data().startsWith(u"//")
 128         ? QUrl(u"file:" + path.data())
 129         : QUrl::fromLocalFile(path.data());
 130
 131 #ifdef Q_OS_WIN
 132     auto *thread = QThread::create([path]()
 133     {
 134         if (SUCCEEDED(::CoInitializeEx(NULL, (COINIT_APARTMENTTHREADED | COINIT_DISABLE_OLE1DDE))))
 135         {
 136             const std::wstring pathWStr = path.toString().toStdWString();
 137
 138             ::ShellExecuteW(nullptr, nullptr, pathWStr.c_str(), nullptr, nullptr, SW_SHOWNORMAL);
 139
 140             ::CoUninitialize();
 141         }
 142     });
 143     QObject::connect(thread, &QThread::finished, thread, &QObject::deleteLater);
 144     thread->start();
 145 #else
 146     QDesktopServices::openUrl(url);
 147 #endif
 148 }
 149
 150 // Open the parent directory of the given path with a file manager and select
 151 // (if possible) the item at the given path
 152 void Utils::Gui::openFolderSelect(const Path &path)
 153 {
 154     // If the item to select doesn't exist, try to open its parent
 155     if (!path.exists())
 156     {
 157         openPath(path.parentPath());
 158         return;
 159     }
 160
 161 #ifdef Q_OS_WIN
 162     auto *thread = QThread::create([path]()
 163     {
 164         if (SUCCEEDED(::CoInitializeEx(NULL, COINIT_APARTMENTTHREADED | COINIT_DISABLE_OLE1DDE)))
 165         {
 166             const std::wstring pathWStr = path.toString().toStdWString();
 167             PIDLIST_ABSOLUTE pidl = ::ILCreateFromPathW(pathWStr.c_str());
 168             if (pidl)
 169             {
 170                 ::SHOpenFolderAndSelectItems(pidl, 0, nullptr, 0);
 171                 ::ILFree(pidl);
 172             }
 173
 174             ::CoUninitialize();
 175         }
 176     });
 177     QObject::connect(thread, &QThread::finished, thread, &QObject::deleteLater);
 178     thread->start();
 179 #elif defined(Q_OS_UNIX) && !defined(Q_OS_MACOS)
 180     const int lineMaxLength = 64;
 181
 182     QProcess proc;
 183     proc.start(u"xdg-mime"_s, {u"query"_s, u"default"_s, u"inode/directory"_s});
 184     proc.waitForFinished();
 185     const auto output = QString::fromLocal8Bit(proc.readLine(lineMaxLength).simplified());
 186     if ((output == u"dolphin.desktop") || (output == u"org.kde.dolphin.desktop"))
 187     {
 188         proc.startDetached(u"dolphin"_s, {u"--select"_s, path.toString()});
 189     }
 190     else if ((output == u"nautilus.desktop") || (output == u"org.gnome.Nautilus.desktop")
 191                  || (output == u"nautilus-folder-handler.desktop"))
 192     {
 193         proc.start(u"nautilus"_s, {u"--version"_s});
 194         proc.waitForFinished();
 195         const auto nautilusVerStr = QString::fromLocal8Bit(proc.readLine(lineMaxLength)).remove(QRegularExpression(u"[^0-9.]"_s));
 196         using NautilusVersion = Utils::Version<3>;
 197         if (NautilusVersion::fromString(nautilusVerStr, {1, 0, 0}) > NautilusVersion(3, 28, 0))
 198             proc.startDetached(u"nautilus"_s, {(Fs::isDir(path) ? path.parentPath() : path).toString()});
 199         else
 200             proc.startDetached(u"nautilus"_s, {u"--no-desktop"_s, (Fs::isDir(path) ? path.parentPath() : path).toString()});
 201     }
 202     else if (output == u"nemo.desktop")
 203     {
 204         proc.startDetached(u"nemo"_s, {u"--no-desktop"_s, (Fs::isDir(path) ? path.parentPath() : path).toString()});
 205     }
 206     else if ((output == u"konqueror.desktop") || (output == u"kfmclient_dir.desktop"))
 207     {
 208         proc.startDetached(u"konqueror"_s, {u"--select"_s, path.toString()});
 209     }
 210     else
 211     {
 212         // "caja" manager can't pinpoint the file, see: https://github.com/qbittorrent/qBittorrent/issues/5003
 213         openPath(path.parentPath());
 214     }
 215 #else
 216     openPath(path.parentPath());
 217 #endif
 218 }