| 1 | // Copyright (C) 2016 The Qt Company Ltd. |
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| 2 | // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only |
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| 3 | |
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| 4 | #include "qplatformprintplugin.h" |
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| 5 | #include "qplatformprintersupport.h" |
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| 6 | #include "qprinterinfo.h" |
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| 7 | #include "private/qfactoryloader_p.h" |
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| 8 | #include <qcoreapplication.h> |
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| 9 | #include <qdebug.h> |
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| 10 | |
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| 11 | #ifndef QT_NO_PRINTER |
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| 12 | |
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| 13 | #if defined(Q_OS_MACOS) |
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| 14 | Q_IMPORT_PLUGIN(QCocoaPrinterSupportPlugin) |
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| 15 | #elif defined(Q_OS_WIN) |
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| 16 | Q_IMPORT_PLUGIN(QWindowsPrinterSupportPlugin) |
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| 17 | #endif |
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| 18 | |
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| 19 | QT_BEGIN_NAMESPACE |
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| 20 | |
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| 21 | using namespace Qt::StringLiterals; |
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| 22 | |
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| 23 | Q_GLOBAL_STATIC_WITH_ARGS(QFactoryLoader, loader, |
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| 24 | (QPlatformPrinterSupportFactoryInterface_iid, "/printsupport"_L1 , Qt::CaseInsensitive)) |
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| 25 | |
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| 26 | QPlatformPrinterSupportPlugin::QPlatformPrinterSupportPlugin(QObject *parent) |
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| 27 | : QObject(parent) |
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| 28 | { |
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| 29 | } |
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| 30 | |
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| 31 | QPlatformPrinterSupportPlugin::~QPlatformPrinterSupportPlugin() |
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| 32 | { |
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| 33 | } |
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| 34 | |
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| 35 | static QPlatformPrinterSupport *printerSupport = nullptr; |
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| 36 | |
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| 37 | static void cleanupPrinterSupport() |
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| 38 | { |
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| 39 | delete printerSupport; |
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| 40 | printerSupport = nullptr; |
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| 41 | } |
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| 42 | |
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| 43 | /*! |
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| 44 | \internal |
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| 45 | |
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| 46 | Returns a lazily-initialized singleton. Ownership is granted to the |
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| 47 | QPlatformPrinterSupportPlugin, which is never unloaded or destroyed until |
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| 48 | application exit, i.e. you can expect this pointer to always be valid and |
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| 49 | multiple calls to this function will always return the same pointer. |
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| 50 | */ |
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| 51 | QPlatformPrinterSupport *QPlatformPrinterSupportPlugin::get() |
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| 52 | { |
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| 53 | if (!printerSupport) { |
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| 54 | const QMultiMap<int, QString> keyMap = loader()->keyMap(); |
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| 55 | QMultiMap<int, QString>::const_iterator it = keyMap.cbegin(); |
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| 56 | if (!qEnvironmentVariableIsEmpty(varName: "QT_PRINTER_MODULE" )) { |
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| 57 | QString module = QString::fromLocal8Bit(ba: qgetenv(varName: "QT_PRINTER_MODULE" )); |
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| 58 | QMultiMap<int, QString>::const_iterator it2 = std::find_if(first: keyMap.cbegin(), last: keyMap.cend(), pred: [module](const QString &value){ return value == module; }); |
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| 59 | if (it2 == keyMap.cend()) |
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| 60 | qWarning() << "Unable to load printer plugin" << module; |
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| 61 | else |
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| 62 | it = it2; |
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| 63 | } |
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| 64 | if (it != keyMap.cend()) |
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| 65 | printerSupport = qLoadPlugin<QPlatformPrinterSupport, QPlatformPrinterSupportPlugin>(loader: loader(), key: it.value()); |
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| 66 | if (printerSupport) |
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| 67 | qAddPostRoutine(cleanupPrinterSupport); |
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| 68 | } |
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| 69 | return printerSupport; |
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| 70 | } |
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| 71 | |
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| 72 | QT_END_NAMESPACE |
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| 73 | |
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| 74 | #include "moc_qplatformprintplugin.cpp" |
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| 75 | |
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| 76 | #endif |
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| 77 | |
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