Use QString literals

It covers src/webui and enables `QT_NO_CAST_FROM_ASCII`.

cmake/Modules/MacroQbtCommonConfig.cmake

@@ -18,6 +18,7 @@ macro(qbt_common_config)
 
     target_compile_definitions(qbt_common_cfg INTERFACE
         QT_DISABLE_DEPRECATED_BEFORE=0x050f02
+        QT_NO_CAST_FROM_ASCII
         QT_NO_CAST_TO_ASCII
         QT_NO_CAST_FROM_BYTEARRAY
         QT_USE_QSTRINGBUILDER

src/app/application.cpp

@@ -44,6 +44,7 @@
 #endif
 
 #include <QAtomicInt>
+#include <QByteArray>
 #include <QDebug>
 #include <QLibraryInfo>
 #include <QProcess>
@@ -326,7 +327,7 @@ void Application::runExternalProgram(const BitTorrent::Torrent *torrent) const
 #if defined(Q_OS_WIN)
     const auto chopPathSep = [](const QString &str) -> QString
     {
-        if (str.endsWith('\\'))
+        if (str.endsWith(u'\\'))
             return str.mid(0, (str.length() -1));
         return str;
     };
@@ -677,11 +678,11 @@ int Application::exec(const QStringList &params)
         + tr("To control qBittorrent, access the WebUI at: %1").arg(url);
     printf("%s\n", qUtf8Printable(mesg));
 
-    if (pref->getWebUIPassword() == "ARQ77eY1NUZaQsuDHbIMCA==:0WMRkYTUWVT9wVvdDtHAjU9b3b7uB8NR1Gur2hmQCvCDpm39Q+PsJRJPaCU51dEiz+dTzh8qbPsL8WkFljQYFQ==")
+    if (pref->getWebUIPassword() == QByteArrayLiteral("ARQ77eY1NUZaQsuDHbIMCA==:0WMRkYTUWVT9wVvdDtHAjU9b3b7uB8NR1Gur2hmQCvCDpm39Q+PsJRJPaCU51dEiz+dTzh8qbPsL8WkFljQYFQ=="))
     {
-        const QString warning = tr("The Web UI administrator username is: %1").arg(pref->getWebUiUsername()) + '\n'
-            + tr("The Web UI administrator password has not been changed from the default: %1").arg("adminadmin") + '\n'
-            + tr("This is a security risk, please change your password in program preferences.") + '\n';
+        const QString warning = tr("The Web UI administrator username is: %1").arg(pref->getWebUiUsername()) + u'\n'
+            + tr("The Web UI administrator password has not been changed from the default: %1").arg(u"adminadmin"_qs) + u'\n'
+            + tr("This is a security risk, please change your password in program preferences.") + u'\n';
         printf("%s", qUtf8Printable(warning));
     }
 #endif // DISABLE_WEBUI

src/app/main.cpp

@@ -416,9 +416,9 @@ bool userAgreesWithLegalNotice()
 
 #ifdef DISABLE_GUI
     const QString eula = QString::fromLatin1("\n*** %1 ***\n").arg(QObject::tr("Legal Notice"))
-        + QObject::tr("qBittorrent is a file sharing program. When you run a torrent, its data will be made available to others by means of upload. Any content you share is your sole responsibility.") + "\n\n"
-        + QObject::tr("No further notices will be issued.") + "\n\n"
-        + QObject::tr("Press %1 key to accept and continue...").arg("'y'") + '\n';
+        + QObject::tr("qBittorrent is a file sharing program. When you run a torrent, its data will be made available to others by means of upload. Any content you share is your sole responsibility.") + u"\n\n"
+        + QObject::tr("No further notices will be issued.") + u"\n\n"
+        + QObject::tr("Press %1 key to accept and continue...").arg(u"'y'"_qs) + u'\n';
     printf("%s", qUtf8Printable(eula));
 
     const char ret = getchar(); // Read pressed key

src/app/stacktrace_win.h

@@ -31,6 +31,8 @@
 #include <cxxabi.h>
 #endif
 
+#include "base/global.h"
+
 namespace straceWin
 {
     void loadHelpStackFrame(IMAGEHLP_STACK_FRAME&, const STACKFRAME64&);
@@ -50,7 +52,7 @@ namespace straceWin
 #ifdef __MINGW32__
 void straceWin::demangle(QString& str)
 {
-    char const* inStr = qPrintable("_" + str); // Really need that underline or demangling will fail
+    char const* inStr = qPrintable(u"_" + str); // Really need that underline or demangling will fail
     int status = 0;
     size_t outSz = 0;
     char* demangled_name = abi::__cxa_demangle(inStr, 0, &outSz, &status);
@@ -75,7 +77,7 @@ BOOL CALLBACK straceWin::EnumSymbolsCB(PSYMBOL_INFO symInfo, ULONG size, PVOID u
     Q_UNUSED(size)
     auto params = static_cast<QStringList *>(user);
     if (symInfo->Flags & SYMFLAG_PARAMETER)
-        params->append(symInfo->Name);
+        params->append(QString::fromUtf8(symInfo->Name));
     return TRUE;
 }
 
@@ -97,16 +99,16 @@ BOOL CALLBACK straceWin::EnumModulesCB(LPCSTR ModuleName, DWORD64 BaseOfDll, PVO
     {
         QString moduleBase = QString::fromLatin1("0x%1").arg(BaseOfDll, 16, 16, QLatin1Char('0'));
         QString line = QString::fromLatin1("%1 %2 Image: %3")
-                       .arg(mod.ModuleName, -25)
+                       .arg(QString::fromUtf8(mod.ModuleName), -25)
                        .arg(moduleBase, -13)
-                       .arg(mod.LoadedImageName);
+                       .arg(QString::fromUtf8(mod.LoadedImageName));
         context->stream << line << '\n';
 
-        QString pdbName(mod.LoadedPdbName);
+        const auto pdbName = QString::fromUtf8(mod.LoadedPdbName);
         if(!pdbName.isEmpty())
         {
             QString line2 = QString::fromLatin1("%1 %2")
-                            .arg("", 35)
+                            .arg(u""_qs, 35)
                             .arg(pdbName);
             context->stream << line2 << '\n';
         }
@@ -119,7 +121,7 @@ BOOL CALLBACK straceWin::EnumModulesCB(LPCSTR ModuleName, DWORD64 BaseOfDll, PVO
 * Cuts off leading 'dir' path from 'file' path, otherwise leaves it unchanged
 * returns true if 'dir' is an ancestor of 'file', otherwise - false
 */
-bool straceWin::makeRelativePath(const QString& dir, QString& file)
+bool straceWin::makeRelativePath(const QString &dir, QString &file)
 {
     QString d = QDir::toNativeSeparators(QDir(dir).absolutePath());
     QString f = QDir::toNativeSeparators(QFileInfo(file).absoluteFilePath());
@@ -148,7 +150,7 @@ QString straceWin::getSourcePathAndLineNumber(HANDLE hProcess, DWORD64 addr)
 
     if (SymGetLineFromAddr64(hProcess, addr, &dwDisplacement, &line))
     {
-        QString path(line.FileName);
+        auto path = QString::fromUtf8(line.FileName);
 
 #if defined STACKTRACE_WIN_PROJECT_PATH || defined STACKTRACE_WIN_MAKEFILE_PATH
 
@@ -159,14 +161,14 @@ QString straceWin::getSourcePathAndLineNumber(HANDLE hProcess, DWORD64 addr)
 
         bool success = false;
 #ifdef STACKTRACE_WIN_PROJECT_PATH
-        QString projectPath(STACKTRACE_WIN_STRING(STACKTRACE_WIN_PROJECT_PATH));
+        const auto projectPath = QStringLiteral(STACKTRACE_WIN_STRING(STACKTRACE_WIN_PROJECT_PATH));
         success = makeRelativePath(projectPath, path);
 #endif
 
 #ifdef STACKTRACE_WIN_MAKEFILE_PATH
         if (!success)
         {
-            QString targetPath(STACKTRACE_WIN_STRING(STACKTRACE_WIN_MAKEFILE_PATH));
+            const auto targetPath = QStringLiteral(STACKTRACE_WIN_STRING(STACKTRACE_WIN_MAKEFILE_PATH));
             makeRelativePath(targetPath, path);
         }
 #endif
@@ -285,19 +287,19 @@ const QString straceWin::getBacktrace()
         if(StackFrame.AddrPC.Offset != 0)
         { // Valid frame.
 
-            QString fileName("???");
+            auto fileName = u"???"_qs;
             if(SymGetModuleInfo64(hProcess, ihsf.InstructionOffset, &mod))
             {
-                fileName = QString(mod.ImageName);
-                int slashPos = fileName.lastIndexOf('\\');
+                fileName = QString::fromUtf8(mod.ImageName);
+                int slashPos = fileName.lastIndexOf(u'\\');
                 if(slashPos != -1)
                     fileName = fileName.mid(slashPos + 1);
             }
             QString funcName;
             QString sourceFile;
             if(SymFromAddr(hProcess, ihsf.InstructionOffset, &dwDisplacement, pSymbol))
             {
-                funcName = QString(pSymbol->Name);
+                funcName = QString::fromUtf8(pSymbol->Name);
 #ifdef __MINGW32__
                 demangle(funcName);
 #endif
@@ -317,17 +319,17 @@ const QString straceWin::getBacktrace()
 #endif
 
             QString insOffset = QString::fromLatin1("0x%1").arg(ihsf.InstructionOffset, 16, 16, QLatin1Char('0'));
-            QString formatLine = "#%1 %2 %3 %4";
+            auto formatLine = u"#%1 %2 %3 %4"_qs;
 #ifndef __MINGW32__
-            formatLine += "(%5)";
+            formatLine += u"(%5)"_qs;
 #endif
             QString debugLine = formatLine
                                 .arg(i, 3, 10)
                                 .arg(fileName, -20)
                                 .arg(insOffset, -11)
                                 .arg(funcName)
 #ifndef __MINGW32__
-                                .arg(params.join(", "));
+                                .arg(params.join(u", "));
 
             if (!sourceFile.isEmpty())
                 debugLine += QString::fromLatin1("[ %1 ]").arg(sourceFile);

src/app/stacktracedialog.cpp

@@ -50,7 +50,7 @@ StacktraceDialog::~StacktraceDialog()
 void StacktraceDialog::setStacktraceString(const QString &sigName, const QString &trace)
 {
     // try to call Qt function as less as possible
-    const QString htmlStr = QString(
+    const QString htmlStr = QStringLiteral(
         "<p align=center><b><font size=7 color=red>"
         "qBittorrent has crashed"
         "</font></b></p>"

src/base/bittorrent/session.cpp

@@ -3170,7 +3170,7 @@ void Session::setOSMemoryPriority(const OSMemoryPriority priority)
 void Session::applyOSMemoryPriority() const
 {
     using SETPROCESSINFORMATION = BOOL (WINAPI *)(HANDLE, PROCESS_INFORMATION_CLASS, LPVOID, DWORD);
-    const auto setProcessInformation = Utils::Misc::loadWinAPI<SETPROCESSINFORMATION>("Kernel32.dll", "SetProcessInformation");
+    const auto setProcessInformation = Utils::Misc::loadWinAPI<SETPROCESSINFORMATION>(u"Kernel32.dll"_qs, "SetProcessInformation");
     if (!setProcessInformation)  // only available on Windows >= 8
         return;
 

src/base/utils/foreignapps.cpp

@@ -186,7 +186,7 @@ namespace
             bool found = false;
             while (!found && !versions.empty())
             {
-                const QString version = versions.takeLast() + "\\InstallPath";
+                const QString version = versions.takeLast() + u"\\InstallPath";
                 LPWSTR lpSubkey = new WCHAR[version.size() + 1];
                 version.toWCharArray(lpSubkey);
                 lpSubkey[version.size()] = 0;
@@ -205,15 +205,15 @@ namespace
                     {
                         const QDir baseDir {path};
 
-                        if (baseDir.exists("python3.exe"))
+                        if (baseDir.exists(u"python3.exe"_qs))
                         {
                             found = true;
-                            path = baseDir.filePath("python3.exe");
+                            path = baseDir.filePath(u"python3.exe"_qs);
                         }
-                        else if (baseDir.exists("python.exe"))
+                        else if (baseDir.exists(u"python.exe"_qs))
                         {
                             found = true;
-                            path = baseDir.filePath("python.exe");
+                            path = baseDir.filePath(u"python.exe"_qs);
                         }
                     }
                 }
@@ -243,14 +243,14 @@ namespace
             return path;
 
         // Fallback: Detect python from default locations
-        const QFileInfoList dirs = QDir("C:/").entryInfoList({"Python*"}, QDir::Dirs, (QDir::Name | QDir::Reversed));
+        const QFileInfoList dirs = QDir(u"C:/"_qs).entryInfoList({u"Python*"_qs}, QDir::Dirs, (QDir::Name | QDir::Reversed));
         for (const QFileInfo &info : dirs)
         {
-            const QString py3Path {info.absolutePath() + "/python3.exe"};
+            const QString py3Path {info.absolutePath() + u"/python3.exe"};
             if (QFile::exists(py3Path))
                 return py3Path;
 
-            const QString pyPath {info.absolutePath() + "/python.exe"};
+            const QString pyPath {info.absolutePath() + u"/python.exe"};
             if (QFile::exists(pyPath))
                 return pyPath;
         }

src/base/utils/misc.h

@@ -93,8 +93,8 @@ namespace Utils::Misc
     T loadWinAPI(const QString &source, const char *funcName)
     {
         QString path = windowsSystemPath();
-        if (!path.endsWith('\\'))
-            path += '\\';
+        if (!path.endsWith(u'\\'))
+            path += u'\\';
 
         path += source;
 

src/base/utils/random.cpp

@@ -43,7 +43,8 @@
 
 #include <QString>
 
-#include "misc.h"
+#include "base/global.h"
+#include "base/utils/misc.h"
 
 namespace
 {
@@ -55,7 +56,7 @@ namespace
         using result_type = uint32_t;
 
         RandomLayer()
-            : m_rtlGenRandom {Utils::Misc::loadWinAPI<PRTLGENRANDOM>("Advapi32.dll", "SystemFunction036")}
+            : m_rtlGenRandom {Utils::Misc::loadWinAPI<PRTLGENRANDOM>(u"Advapi32.dll"_qs, "SystemFunction036")}
         {
             if (!m_rtlGenRandom)
                 qFatal("Failed to load RtlGenRandom()");

src/gui/mainwindow.cpp

@@ -1604,7 +1604,7 @@ void MainWindow::reloadSessionStats()
     }
     else if (!MacUtils::badgeLabelText().isEmpty())
     {
-        MacUtils::setBadgeLabelText("");
+        MacUtils::setBadgeLabelText({});
     }
 #else
     if (m_systrayIcon)
@@ -1905,8 +1905,8 @@ void MainWindow::handleUpdateCheckFinished(ProgramUpdater *updater, const bool i
     const QString newVersion = updater->getNewVersion();
     if (!newVersion.isEmpty())
     {
-        const QString msg {tr("A new version is available.") + "<br/>"
-            + tr("Do you want to download %1?").arg(newVersion) + "<br/><br/>"
+        const QString msg {tr("A new version is available.") + u"<br/>"
+            + tr("Do you want to download %1?").arg(newVersion) + u"<br/><br/>"
             + QString::fromLatin1("<a href=\"https://www.qbittorrent.org/news.php\">%1</a>").arg(tr("Open changelog..."))};
         auto *msgBox = new QMessageBox {QMessageBox::Question, tr("qBittorrent Update Available"), msg
             , (QMessageBox::Yes | QMessageBox::No), this};
@@ -2082,9 +2082,9 @@ void MainWindow::installPython()
     setCursor(QCursor(Qt::WaitCursor));
     // Download python
 #ifdef QBT_APP_64BIT
-    const QString installerURL = "https://www.python.org/ftp/python/3.8.10/python-3.8.10-amd64.exe";
+    const auto installerURL = u"https://www.python.org/ftp/python/3.8.10/python-3.8.10-amd64.exe"_qs;
 #else
-    const QString installerURL = "https://www.python.org/ftp/python/3.8.10/python-3.8.10.exe";
+    const auto installerURL = u"https://www.python.org/ftp/python/3.8.10/python-3.8.10.exe"_qs;
 #endif
     Net::DownloadManager::instance()->download(
                 Net::DownloadRequest(installerURL).saveToFile(true)
@@ -2109,7 +2109,7 @@ void MainWindow::pythonDownloadFinished(const Net::DownloadResult &result)
 
     const Path exePath = result.filePath + ".exe";
     Utils::Fs::renameFile(result.filePath, exePath);
-    installer.start(exePath.toString(), {"/passive"});
+    installer.start(exePath.toString(), {u"/passive"_qs});
 
     // Wait for setup to complete
     installer.waitForFinished(10 * 60 * 1000);

src/gui/programupdater.cpp

@@ -43,6 +43,7 @@
 #include <QSysInfo>
 #endif
 
+#include "base/global.h"
 #include "base/net/downloadmanager.h"
 #include "base/utils/version.h"
 #include "base/version.h"
@@ -79,7 +80,7 @@ void ProgramUpdater::checkForUpdates() const
     // Don't change this User-Agent. In case our updater goes haywire,
     // the filehost can identify it and contact us.
     Net::DownloadManager::instance()->download(
-        Net::DownloadRequest(RSS_URL).userAgent("qBittorrent/" QBT_VERSION_2 " ProgramUpdater (www.qbittorrent.org)")
+        Net::DownloadRequest(RSS_URL).userAgent(QStringLiteral("qBittorrent/" QBT_VERSION_2 " ProgramUpdater (www.qbittorrent.org)"))
         , this, &ProgramUpdater::rssDownloadFinished);
 }
 
@@ -108,11 +109,11 @@ void ProgramUpdater::rssDownloadFinished(const Net::DownloadResult &result)
     };
 
 #ifdef Q_OS_MACOS
-    const QString OS_TYPE {"Mac OS X"};
+    const QString OS_TYPE = u"Mac OS X"_qs;
 #elif defined(Q_OS_WIN)
-    const QString OS_TYPE {(::IsWindows7OrGreater()
-        && QSysInfo::currentCpuArchitecture().endsWith("64"))
-        ? "Windows x64" : "Windows"};
+    const QString OS_TYPE = (::IsWindows7OrGreater() && QSysInfo::currentCpuArchitecture().endsWith(u"64"))
+        ? u"Windows x64"_qs
+        : u"Windows"_qs;
 #endif
 
     bool inItem = false;

src/gui/progressbarpainter.cpp

@@ -37,10 +37,12 @@
 #include <QProxyStyle>
 #endif
 
+#include "base/global.h"
+
 ProgressBarPainter::ProgressBarPainter()
 {
 #if (defined(Q_OS_WIN) || defined(Q_OS_MACOS))
-    auto *fusionStyle = new QProxyStyle {"fusion"};
+    auto *fusionStyle = new QProxyStyle {u"fusion"_qs};
     fusionStyle->setParent(&m_dummyProgressBar);
     m_dummyProgressBar.setStyle(fusionStyle);
 #endif

src/gui/transferlistmodel.cpp

@@ -168,7 +168,7 @@ QVariant TransferListModel::headerData(int section, Qt::Orientation orientation,
         {
             switch (section)
             {
-            case TR_QUEUE_POSITION: return u'#';
+            case TR_QUEUE_POSITION: return QChar(u'#');
             case TR_NAME: return tr("Name", "i.e: torrent name");
             case TR_SIZE: return tr("Size", "i.e: torrent size");
             case TR_PROGRESS: return tr("Progress", "% Done");

src/src.pro

@@ -57,6 +57,7 @@ include(../version.pri)
 
 # Qt defines
 DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x050f02
+DEFINES += QT_NO_CAST_FROM_ASCII
 DEFINES += QT_NO_CAST_TO_ASCII
 DEFINES += QT_NO_CAST_FROM_BYTEARRAY
 DEFINES += QT_USE_QSTRINGBUILDER