| 1 | // Copyright (C) 2017 Erik Larsson. |
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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 | #ifndef QWAYLANDCLIENTEXTENSION_H |
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| 5 | #define QWAYLANDCLIENTEXTENSION_H |
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| 6 | |
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| 7 | #include <QtCore/QObject> |
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| 8 | #include <QtWaylandClient/qtwaylandclientglobal.h> |
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| 9 | |
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| 10 | struct wl_interface; |
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| 11 | struct wl_registry; |
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| 12 | |
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| 13 | QT_BEGIN_NAMESPACE |
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| 14 | |
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| 15 | namespace QtWaylandClient { |
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| 16 | class QWaylandIntegration; |
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| 17 | } |
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| 18 | |
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| 19 | class QWaylandClientExtensionPrivate; |
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| 20 | class QWaylandClientExtensionTemplatePrivate; |
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| 21 | |
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| 22 | class Q_WAYLANDCLIENT_EXPORT QWaylandClientExtension : public QObject |
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| 23 | { |
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| 24 | Q_OBJECT |
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| 25 | Q_DECLARE_PRIVATE(QWaylandClientExtension) |
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| 26 | Q_PROPERTY(int protocolVersion READ version NOTIFY versionChanged) |
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| 27 | Q_PROPERTY(bool active READ isActive NOTIFY activeChanged) |
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| 28 | public: |
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| 29 | QWaylandClientExtension(const int version); |
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| 30 | ~QWaylandClientExtension(); |
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| 31 | |
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| 32 | QtWaylandClient::QWaylandIntegration *integration() const; |
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| 33 | int version() const; |
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| 34 | bool isActive() const; |
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| 35 | |
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| 36 | virtual const struct wl_interface *extensionInterface() const = 0; |
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| 37 | virtual void bind(struct ::wl_registry *registry, int id, int version) = 0; |
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| 38 | protected: |
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| 39 | void setVersion(const int version); |
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| 40 | Q_SIGNALS: |
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| 41 | void versionChanged(); |
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| 42 | void activeChanged(); |
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| 43 | |
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| 44 | protected Q_SLOTS: |
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| 45 | void initialize(); |
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| 46 | }; |
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| 47 | |
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| 48 | |
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| 49 | template<typename T, auto destruct = nullptr> |
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| 50 | class Q_WAYLANDCLIENT_EXPORT QWaylandClientExtensionTemplate : public QWaylandClientExtension |
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| 51 | { |
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| 52 | Q_DECLARE_PRIVATE(QWaylandClientExtensionTemplate) |
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| 53 | |
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| 54 | public: |
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| 55 | QWaylandClientExtensionTemplate(const int ver) : QWaylandClientExtension(ver) |
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| 56 | { |
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| 57 | if constexpr (destruct != nullptr) { |
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| 58 | connect(this, &QWaylandClientExtensionTemplate::activeChanged, this, [this] { |
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| 59 | if (!isActive()) { |
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| 60 | std::invoke(destruct, static_cast<T *>(this)); |
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| 61 | } |
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| 62 | }); |
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| 63 | } |
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| 64 | } |
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| 65 | |
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| 66 | ~QWaylandClientExtensionTemplate() |
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| 67 | { |
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| 68 | if constexpr (destruct != nullptr) { |
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| 69 | if (isActive()) { |
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| 70 | std::invoke(destruct, static_cast<T *>(this)); |
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| 71 | } |
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| 72 | } |
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| 73 | } |
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| 74 | |
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| 75 | const struct wl_interface *extensionInterface() const override |
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| 76 | { |
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| 77 | return T::interface(); |
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| 78 | } |
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| 79 | |
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| 80 | void bind(struct ::wl_registry *registry, int id, int ver) override |
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| 81 | { |
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| 82 | T* instance = static_cast<T *>(this); |
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| 83 | // Make sure lowest version is used of the supplied version from the |
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| 84 | // developer and the version specified in the protocol and also the |
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| 85 | // compositor version. |
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| 86 | if (this->version() > T::interface()->version) { |
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| 87 | qWarning(msg: "Supplied protocol version to QWaylandClientExtensionTemplate is higher than the version of the protocol, using protocol version instead." ); |
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| 88 | } |
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| 89 | int minVersion = qMin(ver, qMin(T::interface()->version, this->version())); |
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| 90 | setVersion(minVersion); |
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| 91 | instance->init(registry, id, minVersion); |
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| 92 | } |
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| 93 | }; |
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| 94 | |
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| 95 | QT_END_NAMESPACE |
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| 96 | |
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| 97 | #endif // QWAYLANDCLIENTEXTENSION_H |
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| 98 | |
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