/******************************************************************** KWin - the KDE window manager This file is part of the KDE project. Copyright (C) 2012, 2013 Martin Gräßlin This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see . *********************************************************************/ #ifndef KWIN_XCB_UTILS_H #define KWIN_XCB_UTILS_H #include #include "main.h" #include #include #include #include #include #include #include #include class TestXcbSizeHints; namespace KWin { template using ScopedCPointer = QScopedPointer; namespace Xcb { typedef xcb_window_t WindowId; // forward declaration of methods static void defineCursor(xcb_window_t window, xcb_cursor_t cursor); static void setInputFocus(xcb_window_t window, uint8_t revertTo = XCB_INPUT_FOCUS_POINTER_ROOT, xcb_timestamp_t time = xTime()); static void moveWindow(xcb_window_t window, const QPoint &pos); static void moveWindow(xcb_window_t window, uint32_t x, uint32_t y); static void lowerWindow(xcb_window_t window); static void selectInput(xcb_window_t window, uint32_t events); /** * @brief Variadic template to wrap an xcb request. * * This struct is part of the generic implementation to wrap xcb requests * and fetching their reply. Each request is represented by two templated * elements: WrapperData and Wrapper. * * The WrapperData defines the following types: * @li reply_type of the xcb request * @li cookie_type of the xcb request * @li function pointer type for the xcb request * @li function pointer type for the reply * This uses variadic template arguments thus it can be used to specify any * xcb request. * * As the WrapperData does not specify the actual function pointers one needs * to derive another struct which specifies the function pointer requestFunc and * the function pointer replyFunc as static constexpr of type reply_func and * reply_type respectively. E.g. for the command xcb_get_geometry: * @code * struct GeometryData : public WrapperData< xcb_get_geometry_reply_t, xcb_get_geometry_cookie_t, xcb_drawable_t > * { * static constexpr request_func requestFunc = &xcb_get_geometry_unchecked; * static constexpr reply_func replyFunc = &xcb_get_geometry_reply; * }; * @endcode * * To simplify this definition the macro XCB_WRAPPER_DATA is provided. * For the same xcb command this looks like this: * @code * XCB_WRAPPER_DATA(GeometryData, xcb_get_geometry, xcb_drawable_t) * @endcode * * The derived WrapperData has to be passed as first template argument to Wrapper. The other * template arguments of Wrapper are the same variadic template arguments as passed into * WrapperData. This is ensured at compile time and will cause a compile error in case there * is a mismatch of the variadic template arguments passed to WrapperData and Wrapper. * Passing another type than a struct derived from WrapperData to Wrapper will result in a * compile error. The following code snippets won't compile: * @code * XCB_WRAPPER_DATA(GeometryData, xcb_get_geometry, xcb_drawable_t) * // fails with "static assertion failed: Argument miss-match between Wrapper and WrapperData" * class IncorrectArguments : public Wrapper * { * public: * IncorrectArguments() = default; * IncorrectArguments(xcb_window_t window) : Wrapper(window) {} * }; * * // fails with "static assertion failed: Data template argument must be derived from WrapperData" * class WrapperDataDirectly : public Wrapper, xcb_drawable_t> * { * public: * WrapperDataDirectly() = default; * WrapperDataDirectly(xcb_window_t window) : Wrapper, xcb_drawable_t>(window) {} * }; * * // fails with "static assertion failed: Data template argument must be derived from WrapperData" * struct FakeWrapperData * { * typedef xcb_get_geometry_reply_t reply_type; * typedef xcb_get_geometry_cookie_t cookie_type; * typedef std::tuple argument_types; * typedef cookie_type (*request_func)(xcb_connection_t*, xcb_drawable_t); * typedef reply_type *(*reply_func)(xcb_connection_t*, cookie_type, xcb_generic_error_t**); * static constexpr std::size_t argumentCount = 1; * static constexpr request_func requestFunc = &xcb_get_geometry_unchecked; * static constexpr reply_func replyFunc = &xcb_get_geometry_reply; * }; * class NotDerivedFromWrapperData : public Wrapper * { * public: * NotDerivedFromWrapperData() = default; * NotDerivedFromWrapperData(xcb_window_t window) : Wrapper(window) {} * }; * @endcode * * The Wrapper provides an easy to use RAII API which calls the WrapperData's requestFunc in * the ctor and fetches the reply the first time it is used. In addition the dtor takes care * of freeing the reply if it got fetched, otherwise it discards the reply. The Wrapper can * be used as if it were the reply_type directly. * * There are several command wrappers defined which either subclass Wrapper to add methods to * simplify the usage of the result_type or use a typedef. To add a new typedef one can use the * macro XCB_WRAPPER which creates the WrapperData struct as XCB_WRAPPER_DATA does and the * typedef. E.g: * @code * XCB_WRAPPER(Geometry, xcb_get_geometry, xcb_drawable_t) * @endcode * * creates a typedef Geometry and the struct GeometryData. * * Overall this allows to simplify the Xcb usage. For example consider the * following xcb code snippet: * @code * xcb_window_t w; // some window * xcb_connection_t *c = connection(); * const xcb_get_geometry_cookie_t cookie = xcb_get_geometry_unchecked(c, w); * // do other stuff * xcb_get_geometry_reply_t *reply = xcb_get_geometry_reply(c, cookie, nullptr); * if (reply) { * reply->x; // do something with the geometry * } * free(reply); * @endcode * * With the help of the Wrapper class this can be simplified to: * @code * xcb_window_t w; // some window * Xcb::Geometry geo(w); * if (!geo.isNull()) { * geo->x; // do something with the geometry * } * @endcode * * @see XCB_WRAPPER_DATA * @see XCB_WRAPPER * @see Wrapper * @see WindowAttributes * @see OverlayWindow * @see WindowGeometry * @see Tree * @see CurrentInput * @see TransientFor */ template struct WrapperData { /** * @brief The type returned by the xcb reply function. */ typedef Reply reply_type; /** * @brief The type returned by the xcb request function. */ typedef Cookie cookie_type; /** * @brief Variadic arguments combined as a std::tuple. * @internal Used for verifying the arguments. */ typedef std::tuple argument_types; /** * @brief The function pointer definition for the xcb request function. */ typedef Cookie (*request_func)(xcb_connection_t*, Args...); /** * @brief The function pointer definition for the xcb reply function. */ typedef Reply *(*reply_func)(xcb_connection_t*, Cookie, xcb_generic_error_t**); /** * @brief Number of variadic arguments. * @internal Used for verifying the arguments. */ static constexpr std::size_t argumentCount = sizeof...(Args); }; /** * @brief Partial template specialization for WrapperData with no further arguments. * * This will be used for xcb requests just taking the xcb_connection_t* argument. **/ template struct WrapperData { typedef Reply reply_type; typedef Cookie cookie_type; typedef std::tuple<> argument_types; typedef Cookie (*request_func)(xcb_connection_t*); typedef Reply *(*reply_func)(xcb_connection_t*, Cookie, xcb_generic_error_t**); static constexpr std::size_t argumentCount = 0; }; /** * @brief Abstract base class for the wrapper. * * This class contains the complete functionality of the Wrapper. It's only an abstract * base class to provide partial template specialization for more specific constructors. */ template class AbstractWrapper { public: typedef typename Data::cookie_type Cookie; typedef typename Data::reply_type Reply; virtual ~AbstractWrapper() { cleanup(); } inline AbstractWrapper &operator=(const AbstractWrapper &other) { if (this != &other) { // if we had managed a reply, free it cleanup(); // copy members m_retrieved = other.m_retrieved; m_cookie = other.m_cookie; m_window = other.m_window; m_reply = other.m_reply; // take over the responsibility for the reply pointer takeFromOther(const_cast(other)); } return *this; } inline const Reply *operator->() { getReply(); return m_reply; } inline bool isNull() { getReply(); return m_reply == NULL; } inline bool isNull() const { const_cast(this)->getReply(); return m_reply == NULL; } inline operator bool() { return !isNull(); } inline operator bool() const { return !isNull(); } inline const Reply *data() { getReply(); return m_reply; } inline const Reply *data() const { const_cast(this)->getReply(); return m_reply; } inline WindowId window() const { return m_window; } inline bool isRetrieved() const { return m_retrieved; } /** * Returns the value of the reply pointer referenced by this object. The reply pointer of * this object will be reset to null. Calling any method which requires the reply to be valid * will crash. * * Callers of this function take ownership of the pointer. **/ inline Reply *take() { getReply(); Reply *ret = m_reply; m_reply = NULL; m_window = XCB_WINDOW_NONE; return ret; } protected: AbstractWrapper() : m_retrieved(false) , m_window(XCB_WINDOW_NONE) , m_reply(NULL) { m_cookie.sequence = 0; } explicit AbstractWrapper(WindowId window, Cookie cookie) : m_retrieved(false) , m_cookie(cookie) , m_window(window) , m_reply(NULL) { } explicit AbstractWrapper(const AbstractWrapper &other) : m_retrieved(other.m_retrieved) , m_cookie(other.m_cookie) , m_window(other.m_window) , m_reply(NULL) { takeFromOther(const_cast(other)); } void getReply() { if (m_retrieved || !m_cookie.sequence) { return; } m_reply = Data::replyFunc(connection(), m_cookie, nullptr); m_retrieved = true; } private: inline void cleanup() { if (!m_retrieved && m_cookie.sequence) { xcb_discard_reply(connection(), m_cookie.sequence); } else if (m_reply) { free(m_reply); } } inline void takeFromOther(AbstractWrapper &other) { if (m_retrieved) { m_reply = other.take(); } else { //ensure that other object doesn't try to get the reply or discards it in the dtor other.m_retrieved = true; other.m_window = XCB_WINDOW_NONE; } } bool m_retrieved; Cookie m_cookie; WindowId m_window; Reply *m_reply; }; /** * @brief Template to compare the arguments of two std::tuple. * * @internal Used by static_assert in Wrapper */ template struct tupleCompare { typedef typename std::tuple_element::type tuple1Type; typedef typename std::tuple_element::type tuple2Type; /** * @c true if both tuple have the same arguments, @c false otherwise. * */ static constexpr bool value = std::is_same< tuple1Type, tuple2Type >::value && tupleCompare::value; }; /** * @brief Recursive template case for first tuple element. */ template struct tupleCompare { typedef typename std::tuple_element<0, T1>::type tuple1Type; typedef typename std::tuple_element<0, T2>::type tuple2Type; static constexpr bool value = std::is_same< tuple1Type, tuple2Type >::value; }; /** * @brief Wrapper taking a WrapperData as first template argument and xcb request args as variadic args. */ template class Wrapper : public AbstractWrapper { public: static_assert(!std::is_same >::value, "Data template argument must be derived from WrapperData"); static_assert(std::is_base_of, Data>::value, "Data template argument must be derived from WrapperData"); static_assert(sizeof...(Args) == Data::argumentCount, "Wrapper and WrapperData need to have same template argument count"); static_assert(tupleCompare, typename Data::argument_types, sizeof...(Args) - 1>::value, "Argument miss-match between Wrapper and WrapperData"); Wrapper() = default; explicit Wrapper(Args... args) : AbstractWrapper(XCB_WINDOW_NONE, Data::requestFunc(connection(), args...)) { } explicit Wrapper(xcb_window_t w, Args... args) : AbstractWrapper(w, Data::requestFunc(connection(), args...)) { } }; /** * @brief Template specialization for xcb_window_t being first variadic argument. **/ template class Wrapper : public AbstractWrapper { public: static_assert(!std::is_same >::value, "Data template argument must be derived from WrapperData"); static_assert(std::is_base_of, Data>::value, "Data template argument must be derived from WrapperData"); static_assert(sizeof...(Args) + 1 == Data::argumentCount, "Wrapper and WrapperData need to have same template argument count"); static_assert(tupleCompare, typename Data::argument_types, sizeof...(Args)>::value, "Argument miss-match between Wrapper and WrapperData"); Wrapper() = default; explicit Wrapper(xcb_window_t w, Args... args) : AbstractWrapper(w, Data::requestFunc(connection(), w, args...)) { } }; /** * @brief Template specialization for no variadic arguments. * * It's needed to prevent ambiguous constructors being generated. **/ template class Wrapper : public AbstractWrapper { public: static_assert(!std::is_same >::value, "Data template argument must be derived from WrapperData"); static_assert(std::is_base_of, Data>::value, "Data template argument must be derived from WrapperData"); static_assert(Data::argumentCount == 0, "Wrapper for no arguments constructed with WrapperData with arguments"); explicit Wrapper() : AbstractWrapper(XCB_WINDOW_NONE, Data::requestFunc(connection())) { } }; class Atom { public: explicit Atom(const QByteArray &name, bool onlyIfExists = false, xcb_connection_t *c = connection()) : m_connection(c) , m_retrieved(false) , m_cookie(xcb_intern_atom_unchecked(m_connection, onlyIfExists, name.length(), name.constData())) , m_atom(XCB_ATOM_NONE) , m_name(name) { } Atom() = delete; Atom(const Atom &) = delete; ~Atom() { if (!m_retrieved && m_cookie.sequence) { xcb_discard_reply(m_connection, m_cookie.sequence); } } operator xcb_atom_t() const { (const_cast(this))->getReply(); return m_atom; } bool isValid() { getReply(); return m_atom != XCB_ATOM_NONE; } bool isValid() const { (const_cast(this))->getReply(); return m_atom != XCB_ATOM_NONE; } inline const QByteArray &name() const { return m_name; } private: void getReply() { if (m_retrieved || !m_cookie.sequence) { return; } ScopedCPointer reply(xcb_intern_atom_reply(m_connection, m_cookie, nullptr)); if (!reply.isNull()) { m_atom = reply->atom; } m_retrieved = true; } xcb_connection_t *m_connection; bool m_retrieved; xcb_intern_atom_cookie_t m_cookie; xcb_atom_t m_atom; QByteArray m_name; }; /** * @brief Macro to create the WrapperData subclass. * * Creates a struct with name @p __NAME__ for the xcb request identified by @p __REQUEST__. * The variadic arguments are used to pass as template arguments to the WrapperData. * * The @p __REQUEST__ is the common prefix of the cookie type, reply type, request function and * reply function. E.g. "xcb_get_geometry" is used to create: * @li cookie type xcb_get_geometry_cookie_t * @li reply type xcb_get_geometry_reply_t * @li request function pointer xcb_get_geometry_unchecked * @li reply function pointer xcb_get_geometry_reply * * @param __NAME__ The name of the WrapperData subclass * @param __REQUEST__ The name of the xcb request, e.g. xcb_get_geometry * @param __VA_ARGS__ The variadic template arguments, e.g. xcb_drawable_t * @see XCB_WRAPPER **/ #define XCB_WRAPPER_DATA( __NAME__, __REQUEST__, ... ) \ struct __NAME__ : public WrapperData< __REQUEST__##_reply_t, __REQUEST__##_cookie_t, __VA_ARGS__ > \ { \ static constexpr request_func requestFunc = &__REQUEST__##_unchecked; \ static constexpr reply_func replyFunc = &__REQUEST__##_reply; \ }; /** * @brief Macro to create Wrapper typedef and WrapperData. * * This macro expands the XCB_WRAPPER_DATA macro and creates an additional * typedef for Wrapper with name @p __NAME__. The created WrapperData is also derived * from @p __NAME__ with "Data" as suffix. * * @param __NAME__ The name for the Wrapper typedef * @param __REQUEST__ The name of the xcb request, passed to XCB_WRAPPER_DATA * @param __VA_ARGS__ The variadic template arguments for Wrapper and WrapperData * @see XCB_WRAPPER_DATA **/ #define XCB_WRAPPER( __NAME__, __REQUEST__, ... ) \ XCB_WRAPPER_DATA( __NAME__##Data, __REQUEST__, __VA_ARGS__ ) \ typedef Wrapper< __NAME__##Data, __VA_ARGS__ > __NAME__; XCB_WRAPPER(WindowAttributes, xcb_get_window_attributes, xcb_window_t) XCB_WRAPPER(OverlayWindow, xcb_composite_get_overlay_window, xcb_window_t) XCB_WRAPPER_DATA(GeometryData, xcb_get_geometry, xcb_drawable_t) class WindowGeometry : public Wrapper { public: WindowGeometry() : Wrapper() {} explicit WindowGeometry(xcb_window_t window) : Wrapper(window) {} inline QRect rect() { const xcb_get_geometry_reply_t *geometry = data(); if (!geometry) { return QRect(); } return QRect(geometry->x, geometry->y, geometry->width, geometry->height); } }; XCB_WRAPPER_DATA(TreeData, xcb_query_tree, xcb_window_t) class Tree : public Wrapper { public: explicit Tree(WindowId window) : Wrapper(window) {} inline WindowId *children() { if (isNull() || data()->children_len == 0) { return nullptr; } return xcb_query_tree_children(data()); } inline xcb_window_t parent() { if (isNull()) return XCB_WINDOW_NONE; return (*this)->parent; } }; XCB_WRAPPER(Pointer, xcb_query_pointer, xcb_window_t) struct CurrentInputData : public WrapperData< xcb_get_input_focus_reply_t, xcb_get_input_focus_cookie_t > { static constexpr request_func requestFunc = &xcb_get_input_focus_unchecked; static constexpr reply_func replyFunc = &xcb_get_input_focus_reply; }; class CurrentInput : public Wrapper { public: CurrentInput() : Wrapper() {} inline xcb_window_t window() { if (isNull()) return XCB_WINDOW_NONE; return (*this)->focus; } }; struct QueryKeymapData : public WrapperData< xcb_query_keymap_reply_t, xcb_query_keymap_cookie_t > { static constexpr request_func requestFunc = &xcb_query_keymap_unchecked; static constexpr reply_func replyFunc = &xcb_query_keymap_reply; }; class QueryKeymap : public Wrapper { public: QueryKeymap() : Wrapper() {} }; struct ModifierMappingData : public WrapperData< xcb_get_modifier_mapping_reply_t, xcb_get_modifier_mapping_cookie_t > { static constexpr request_func requestFunc = &xcb_get_modifier_mapping_unchecked; static constexpr reply_func replyFunc = &xcb_get_modifier_mapping_reply; }; class ModifierMapping : public Wrapper { public: ModifierMapping() : Wrapper() {} inline xcb_keycode_t *keycodes() { if (isNull()) { return nullptr; } return xcb_get_modifier_mapping_keycodes(data()); } inline int size() { if (isNull()) { return 0; } return xcb_get_modifier_mapping_keycodes_length(data()); } }; XCB_WRAPPER_DATA(PropertyData, xcb_get_property, uint8_t, xcb_window_t, xcb_atom_t, xcb_atom_t, uint32_t, uint32_t) class Property : public Wrapper { public: Property() : Wrapper() , m_type(XCB_ATOM_NONE) { } Property(const Property &other) : Wrapper(other) , m_type(other.m_type) { } explicit Property(uint8_t _delete, xcb_window_t window, xcb_atom_t property, xcb_atom_t type, uint32_t long_offset, uint32_t long_length) : Wrapper(window, _delete, window, property, type, long_offset, long_length) , m_type(type) { } Property &operator=(const Property &other) { Wrapper::operator=(other); m_type = other.m_type; return *this; } /** * @brief Overloaded method for convenience. * * Uses the type which got passed into the ctor and derives the format from the sizeof(T). * Note: for the automatic format detection the size of the type T may not vary between * architectures. Thus one needs to use e.g. uint32_t instead of long. In general all xcb * data types can be used, all Xlib data types can not be used. * * @param defaultValue The default value to return in case of error * @param ok Set to @c false in case of error, @c true in case of success * @return The read value or @p defaultValue in error case */ template inline typename std::enable_if::value, T>::type value(T defaultValue = T(), bool *ok = nullptr) { return value(sizeof(T) * 8, m_type, defaultValue, ok); } /** * @brief Reads the property as a POD type. * * Returns the first value of the property data. In case of @p format or @p type mismatch * the @p defaultValue is returned. The optional argument @p ok is set * to @c false in case of error and to @c true in case of successful reading of * the property. * * @param format The expected format of the property value, e.g. 32 for XCB_ATOM_CARDINAL * @param type The expected type of the property value, e.g. XCB_ATOM_CARDINAL * @param defaultValue The default value to return in case of error * @param ok Set to @c false in case of error, @c true in case of success * @return The read value or @p defaultValue in error case **/ template inline typename std::enable_if::value, T>::type value(uint8_t format, xcb_atom_t type, T defaultValue = T(), bool *ok = nullptr) { T *reply = value(format, type, nullptr, ok); if (!reply) { return defaultValue; } return reply[0]; } /** * @brief Overloaded method for convenience. * * Uses the type which got passed into the ctor and derives the format from the sizeof(T). * Note: for the automatic format detection the size of the type T may not vary between * architectures. Thus one needs to use e.g. uint32_t instead of long. In general all xcb * data types can be used, all Xlib data types can not be used. * * @param defaultValue The default value to return in case of error * @param ok Set to @c false in case of error, @c true in case of success * @return The read value or @p defaultValue in error case */ template inline typename std::enable_if::value, T>::type value(T defaultValue = nullptr, bool *ok = nullptr) { return value(sizeof(typename std::remove_pointer::type) * 8, m_type, defaultValue, ok); } /** * @brief Reads the property as an array of T. * * This method is an overload for the case that T is a pointer type. * * Return the property value casted to the pointer type T. In case of @p format * or @p type mismatch the @p defaultValue is returned. Also if the value length * is @c 0 the @p defaultValue is returned. The optional argument @p ok is set * to @c false in case of error and to @c true in case of successful reading of * the property. Ok will always be true if the property exists and has been * successfully read, even in the case the property is empty and its length is 0 * * @param format The expected format of the property value, e.g. 32 for XCB_ATOM_CARDINAL * @param type The expected type of the property value, e.g. XCB_ATOM_CARDINAL * @param defaultValue The default value to return in case of error * @param ok Set to @c false in case of error, @c true in case of success * @return The read value or @p defaultValue in error case **/ template inline typename std::enable_if::value, T>::type value(uint8_t format, xcb_atom_t type, T defaultValue = nullptr, bool *ok = nullptr) { if (ok) { *ok = false; } const PropertyData::reply_type *reply = data(); if (!reply) { return defaultValue; } if (reply->type != type) { return defaultValue; } if (reply->format != format) { return defaultValue; } if (ok) { *ok = true; } if (xcb_get_property_value_length(reply) == 0) { return defaultValue; } return reinterpret_cast(xcb_get_property_value(reply)); } /** * @brief Reads the property as string and returns a QByteArray. * * In case of error this method returns a null QByteArray. **/ inline QByteArray toByteArray(uint8_t format = 8, xcb_atom_t type = XCB_ATOM_STRING, bool *ok = nullptr) { bool valueOk = false; const char *reply = value(format, type, nullptr, &valueOk); if (ok) { *ok = valueOk; } if (valueOk && !reply) { return QByteArray("", 0); // valid, not null, but empty data } else if (!valueOk) { return QByteArray(); // Property not found, data empty and null } return QByteArray(reply, xcb_get_property_value_length(data())); } /** * @brief Overloaded method for convenience. **/ inline QByteArray toByteArray(bool *ok) { return toByteArray(8, m_type, ok); } /** * @brief Reads the property as a boolean value. * * If the property reply length is @c 1 the first element is interpreted as a boolean * value returning @c true for any value unequal to @c 0 and @c false otherwise. * * In case of error this method returns @c false. Thus it is not possible to distinguish * between error case and a read @c false value. Use the optional argument @p ok to * distinguish the error case. * * @param format Expected format. Defaults to 32. * @param type Expected type Defaults to XCB_ATOM_CARDINAL. * @param ok Set to @c false in case of error, @c true in case of success * @return bool The first element interpreted as a boolean value or @c false in error case * @see value */ inline bool toBool(uint8_t format = 32, xcb_atom_t type = XCB_ATOM_CARDINAL, bool *ok = nullptr) { bool *reply = value(format, type, nullptr, ok); if (!reply) { return false; } if (data()->value_len != 1) { if (ok) { *ok = false; } return false; } return reply[0] != 0; } /** * @brief Overloaded method for convenience. **/ inline bool toBool(bool *ok) { return toBool(32, m_type, ok); } private: xcb_atom_t m_type; }; class StringProperty : public Property { public: StringProperty() = default; explicit StringProperty(xcb_window_t w, xcb_atom_t p) : Property(false, w, p, XCB_ATOM_STRING, 0, 10000) { } operator QByteArray() { return toByteArray(); } }; class TransientFor : public Property { public: explicit TransientFor(WindowId window) : Property(0, window, XCB_ATOM_WM_TRANSIENT_FOR, XCB_ATOM_WINDOW, 0, 1) { } /** * @brief Fill given window pointer with the WM_TRANSIENT_FOR property of a window. * @param prop WM_TRANSIENT_FOR property value. * @returns @c true on success, @c false otherwise **/ inline bool getTransientFor(WindowId *prop) { WindowId *windows = value(); if (!windows) { return false; } *prop = *windows; return true; } }; class GeometryHints { public: GeometryHints() = default; void init(xcb_window_t window) { Q_ASSERT(window); if (m_window) { // already initialized return; } m_window = window; fetch(); } void fetch() { if (!m_window) { return; } m_sizeHints = nullptr; m_hints = NormalHints(m_window); } void read() { m_sizeHints = m_hints.sizeHints(); } bool hasPosition() const { return testFlag(NormalHints::SizeHints::UserPosition) || testFlag(NormalHints::SizeHints::ProgramPosition); } bool hasSize() const { return testFlag(NormalHints::SizeHints::UserSize) || testFlag(NormalHints::SizeHints::ProgramSize); } bool hasMinSize() const { return testFlag(NormalHints::SizeHints::MinSize); } bool hasMaxSize() const { return testFlag(NormalHints::SizeHints::MaxSize); } bool hasResizeIncrements() const { return testFlag(NormalHints::SizeHints::ResizeIncrements); } bool hasAspect() const { return testFlag(NormalHints::SizeHints::Aspect); } bool hasBaseSize() const { return testFlag(NormalHints::SizeHints::BaseSize); } bool hasWindowGravity() const { return testFlag(NormalHints::SizeHints::WindowGravity); } QSize maxSize() const { if (!hasMaxSize()) { return QSize(INT_MAX, INT_MAX); } return QSize(qMax(m_sizeHints->maxWidth, 1), qMax(m_sizeHints->maxHeight, 1)); } QSize minSize() const { if (!hasMinSize()) { // according to ICCCM 4.1.23 base size should be used as a fallback return baseSize(); } return QSize(m_sizeHints->minWidth, m_sizeHints->minHeight); } QSize baseSize() const { // Note: not using minSize as fallback if (!hasBaseSize()) { return QSize(0, 0); } return QSize(m_sizeHints->baseWidth, m_sizeHints->baseHeight); } QSize resizeIncrements() const { if (!hasResizeIncrements()) { return QSize(1, 1); } return QSize(qMax(m_sizeHints->widthInc, 1), qMax(m_sizeHints->heightInc, 1)); } xcb_gravity_t windowGravity() const { if (!hasWindowGravity()) { return XCB_GRAVITY_NORTH_WEST; } return xcb_gravity_t(m_sizeHints->winGravity); } QSize minAspect() const { if (!hasAspect()) { return QSize(1, INT_MAX); } // prevent devision by zero return QSize(m_sizeHints->minAspect[0], qMax(m_sizeHints->minAspect[1], 1)); } QSize maxAspect() const { if (!hasAspect()) { return QSize(INT_MAX, 1); } // prevent devision by zero return QSize(m_sizeHints->maxAspect[0], qMax(m_sizeHints->maxAspect[1], 1)); } private: /** * NormalHints as specified in ICCCM 4.1.2.3. **/ class NormalHints : public Property { public: struct SizeHints { enum Flags { UserPosition = 1, UserSize = 2, ProgramPosition = 4, ProgramSize = 8, MinSize = 16, MaxSize = 32, ResizeIncrements = 64, Aspect = 128, BaseSize = 256, WindowGravity = 512 }; qint32 flags = 0; qint32 pad[4] = {0, 0, 0, 0}; qint32 minWidth = 0; qint32 minHeight = 0; qint32 maxWidth = 0; qint32 maxHeight = 0; qint32 widthInc = 0; qint32 heightInc = 0; qint32 minAspect[2] = {0, 0}; qint32 maxAspect[2] = {0, 0}; qint32 baseWidth = 0; qint32 baseHeight = 0; qint32 winGravity = 0; }; explicit NormalHints() : Property() {}; explicit NormalHints(WindowId window) : Property(0, window, XCB_ATOM_WM_NORMAL_HINTS, XCB_ATOM_WM_SIZE_HINTS, 0, 18) { } inline SizeHints *sizeHints() { return value(32, XCB_ATOM_WM_SIZE_HINTS, nullptr); } }; friend TestXcbSizeHints; bool testFlag(NormalHints::SizeHints::Flags flag) const { if (!m_window || !m_sizeHints) { return false; } return m_sizeHints->flags & flag; } xcb_window_t m_window = XCB_WINDOW_NONE; NormalHints m_hints; NormalHints::SizeHints *m_sizeHints = nullptr; }; class MotifHints { public: MotifHints(xcb_atom_t atom) : m_atom(atom) {} void init(xcb_window_t window) { Q_ASSERT(window); if (m_window) { // already initialized return; } m_window = window; fetch(); } void fetch() { if (!m_window) { return; } m_hints = nullptr; m_prop = Property(0, m_window, m_atom, m_atom, 0, 5); } void read() { m_hints = m_prop.value(32, m_atom, nullptr); } bool hasDecoration() const { if (!m_window || !m_hints) { return false; } return m_hints->flags & uint32_t(Hints::Decorations); } bool noBorder() const { if (!hasDecoration()) { return false; } return !m_hints->decorations; } bool resize() const { return testFunction(Functions::Resize); } bool move() const { return testFunction(Functions::Move); } bool minimize() const { return testFunction(Functions::Minimize); } bool maximize() const { return testFunction(Functions::Maximize); } bool close() const { return testFunction(Functions::Close); } private: struct MwmHints { uint32_t flags; uint32_t functions; uint32_t decorations; int32_t input_mode; uint32_t status; }; enum class Hints { Functions = (1L << 0), Decorations = (1L << 1) }; enum class Functions { All = (1L << 0), Resize = (1L << 1), Move = (1L << 2), Minimize = (1L << 3), Maximize = (1L << 4), Close = (1L << 5) }; bool testFunction(Functions flag) const { if (!m_window || !m_hints) { return true; } if (!(m_hints->flags & uint32_t(Hints::Functions))) { return true; } // if MWM_FUNC_ALL is set, other flags say what to turn _off_ const bool set_value = ((m_hints->functions & uint32_t(Functions::All)) == 0); if (m_hints->functions & uint32_t(flag)) { return set_value; } return !set_value; } xcb_window_t m_window = XCB_WINDOW_NONE; Property m_prop; xcb_atom_t m_atom; MwmHints *m_hints = nullptr; }; namespace RandR { XCB_WRAPPER(ScreenInfo, xcb_randr_get_screen_info, xcb_window_t) XCB_WRAPPER_DATA(ScreenResourcesData, xcb_randr_get_screen_resources, xcb_window_t) class ScreenResources : public Wrapper { public: explicit ScreenResources(WindowId window) : Wrapper(window) {} inline xcb_randr_crtc_t *crtcs() { if (isNull()) { return nullptr; } return xcb_randr_get_screen_resources_crtcs(data()); } inline xcb_randr_mode_info_t *modes() { if (isNull()) { return nullptr; } return xcb_randr_get_screen_resources_modes(data()); } inline uint8_t *names() { if (isNull()) { return nullptr; } return xcb_randr_get_screen_resources_names(data()); } }; XCB_WRAPPER_DATA(CrtcGammaData, xcb_randr_get_crtc_gamma, xcb_randr_crtc_t) class CrtcGamma : public Wrapper { public: explicit CrtcGamma(xcb_randr_crtc_t c) : Wrapper(c) {} inline uint16_t *red() { return xcb_randr_get_crtc_gamma_red(data()); } inline uint16_t *green() { return xcb_randr_get_crtc_gamma_green(data()); } inline uint16_t *blue() { return xcb_randr_get_crtc_gamma_blue(data()); } }; XCB_WRAPPER_DATA(CrtcInfoData, xcb_randr_get_crtc_info, xcb_randr_crtc_t, xcb_timestamp_t) class CrtcInfo : public Wrapper { public: CrtcInfo() = default; CrtcInfo(const CrtcInfo&) = default; explicit CrtcInfo(xcb_randr_crtc_t c, xcb_timestamp_t t) : Wrapper(c, t) {} inline QRect rect() { const CrtcInfoData::reply_type *info = data(); if (!info || info->num_outputs == 0 || info->mode == XCB_NONE || info->status != XCB_RANDR_SET_CONFIG_SUCCESS) { return QRect(); } return QRect(info->x, info->y, info->width, info->height); } inline xcb_randr_output_t *outputs() { const CrtcInfoData::reply_type *info = data(); if (!info || info->num_outputs == 0 || info->mode == XCB_NONE || info->status != XCB_RANDR_SET_CONFIG_SUCCESS) { return nullptr; } return xcb_randr_get_crtc_info_outputs(info); } }; XCB_WRAPPER_DATA(OutputInfoData, xcb_randr_get_output_info, xcb_randr_output_t, xcb_timestamp_t) class OutputInfo : public Wrapper { public: OutputInfo() = default; OutputInfo(const OutputInfo&) = default; explicit OutputInfo(xcb_randr_output_t c, xcb_timestamp_t t) : Wrapper(c, t) {} inline QString name() { const OutputInfoData::reply_type *info = data(); if (!info || info->num_crtcs == 0 || info->num_modes == 0 || info->status != XCB_RANDR_SET_CONFIG_SUCCESS) { return QString(); } return QString::fromUtf8(reinterpret_cast(xcb_randr_get_output_info_name(info)), info->name_len); } }; XCB_WRAPPER_DATA(CurrentResourcesData, xcb_randr_get_screen_resources_current, xcb_window_t) class CurrentResources : public Wrapper { public: explicit CurrentResources(WindowId window) : Wrapper(window) {} inline xcb_randr_crtc_t *crtcs() { if (isNull()) { return nullptr; } return xcb_randr_get_screen_resources_current_crtcs(data()); } inline xcb_randr_mode_info_t *modes() { if (isNull()) { return nullptr; } return xcb_randr_get_screen_resources_current_modes(data()); } }; XCB_WRAPPER(SetCrtcConfig, xcb_randr_set_crtc_config, xcb_randr_crtc_t, xcb_timestamp_t, xcb_timestamp_t, int16_t, int16_t, xcb_randr_mode_t, uint16_t, uint32_t, const xcb_randr_output_t*) } class ExtensionData { public: ExtensionData(); int version; int eventBase; int errorBase; int majorOpcode; bool present; QByteArray name; QVector opCodes; QVector errorCodes; }; class KWIN_EXPORT Extensions { public: bool isShapeAvailable() const { return m_shape.version > 0; } bool isShapeInputAvailable() const; int shapeNotifyEvent() const; bool hasShape(xcb_window_t w) const; bool isRandrAvailable() const { return m_randr.present; } int randrNotifyEvent() const; bool isDamageAvailable() const { return m_damage.present; } int damageNotifyEvent() const; bool isCompositeAvailable() const { return m_composite.version > 0; } bool isCompositeOverlayAvailable() const; bool isRenderAvailable() const { return m_render.version > 0; } bool isFixesAvailable() const { return m_fixes.version > 0; } int fixesCursorNotifyEvent() const; bool isFixesRegionAvailable() const; bool isSyncAvailable() const { return m_sync.present; } int syncAlarmNotifyEvent() const; QVector extensions() const; bool hasGlx() const { return m_glx.present; } int glxEventBase() const { return m_glx.eventBase; } int glxMajorOpcode() const { return m_glx.majorOpcode; } static Extensions *self(); static void destroy(); private: Extensions(); ~Extensions(); void init(); template void initVersion(T cookie, F f, ExtensionData *dataToFill); void extensionQueryReply(const xcb_query_extension_reply_t *extension, ExtensionData *dataToFill); ExtensionData m_shape; ExtensionData m_randr; ExtensionData m_damage; ExtensionData m_composite; ExtensionData m_render; ExtensionData m_fixes; ExtensionData m_sync; ExtensionData m_glx; static Extensions *s_self; }; /** * This class is an RAII wrapper for an xcb_window_t. An xcb_window_t hold by an instance of this class * will be freed when the instance gets destroyed. * * Furthermore the class provides wrappers around some xcb methods operating on an xcb_window_t. * * For the cases that one is more interested in wrapping the xcb methods the constructor which takes * an existing window and the @link reset method allow to disable the RAII functionality. **/ class Window { public: /** * Takes over responsibility of @p window. If @p window is not provided an invalid Window is * created. Use @link create to set an xcb_window_t later on. * * If @p destroy is @c true the window will be destroyed together with this object, if @c false * the window will be kept around. This is useful if you are not interested in the RAII capabilities * but still want to use a window like an object. * * @param window The window to manage. * @param destroy Whether the window should be destroyed together with the object. * @see reset **/ Window(xcb_window_t window = XCB_WINDOW_NONE, bool destroy = true); /** * Creates an xcb_window_t and manages it. It's a convenient method to create a window with * depth, class and visual being copied from parent and border being @c 0. * @param geometry The geometry for the window to be created * @param mask The mask for the values * @param values The values to be passed to xcb_create_window * @param parent The parent window **/ Window(const QRect &geometry, uint32_t mask = 0, const uint32_t *values = NULL, xcb_window_t parent = rootWindow()); /** * Creates an xcb_window_t and manages it. It's a convenient method to create a window with * depth and visual being copied from parent and border being @c 0. * @param geometry The geometry for the window to be created * @param class The window class * @param mask The mask for the values * @param values The values to be passed to xcb_create_window * @param parent The parent window **/ Window(const QRect &geometry, uint16_t windowClass, uint32_t mask = 0, const uint32_t *values = NULL, xcb_window_t parent = rootWindow()); Window(const Window &other) = delete; ~Window(); /** * Creates a new window for which the responsibility is taken over. If a window had been managed * before it is freed. * * Depth, class and visual are being copied from parent and border is @c 0. * @param geometry The geometry for the window to be created * @param mask The mask for the values * @param values The values to be passed to xcb_create_window * @param parent The parent window **/ void create(const QRect &geometry, uint32_t mask = 0, const uint32_t *values = NULL, xcb_window_t parent = rootWindow()); /** * Creates a new window for which the responsibility is taken over. If a window had been managed * before it is freed. * * Depth and visual are being copied from parent and border is @c 0. * @param geometry The geometry for the window to be created * @param class The window class * @param mask The mask for the values * @param values The values to be passed to xcb_create_window * @param parent The parent window **/ void create(const QRect &geometry, uint16_t windowClass, uint32_t mask = 0, const uint32_t *values = NULL, xcb_window_t parent = rootWindow()); /** * Frees the existing window and starts to manage the new @p window. * If @p destroy is @c true the new managed window will be destroyed together with this * object or when reset is called again. If @p destroy is @c false the window will not * be destroyed. It is then the responsibility of the caller to destroy the window. **/ void reset(xcb_window_t window = XCB_WINDOW_NONE, bool destroy = true); /** * @returns @c true if a window is managed, @c false otherwise. **/ bool isValid() const; /** * Configures the window with a new geometry. * @param geometry The new window geometry to be used **/ inline const QRect &geometry() const { return m_logicGeometry; } void setGeometry(const QRect &geometry); void setGeometry(uint32_t x, uint32_t y, uint32_t width, uint32_t height); void move(const QPoint &pos); void move(uint32_t x, uint32_t y); void resize(const QSize &size); void resize(uint32_t width, uint32_t height); void raise(); void lower(); void map(); void unmap(); void reparent(xcb_window_t parent, int x = 0, int y = 0); void changeProperty(xcb_atom_t property, xcb_atom_t type, uint8_t format, uint32_t lenght, const void *data, uint8_t mode = XCB_PROP_MODE_REPLACE); void deleteProperty(xcb_atom_t property); void setBorderWidth(uint32_t width); void grabButton(uint8_t pointerMode, uint8_t keyboardmode, uint16_t modifiers = XCB_MOD_MASK_ANY, uint8_t button = XCB_BUTTON_INDEX_ANY, uint16_t eventMask = XCB_EVENT_MASK_BUTTON_PRESS, xcb_window_t confineTo = XCB_WINDOW_NONE, xcb_cursor_t cursor = XCB_CURSOR_NONE, bool ownerEvents = false); void ungrabButton(uint16_t modifiers = XCB_MOD_MASK_ANY, uint8_t button = XCB_BUTTON_INDEX_ANY); /** * Clears the window area. Same as xcb_clear_area with x, y, width, height being @c 0. **/ void clear(); void setBackgroundPixmap(xcb_pixmap_t pixmap); void defineCursor(xcb_cursor_t cursor); void focus(uint8_t revertTo = XCB_INPUT_FOCUS_POINTER_ROOT, xcb_timestamp_t time = XCB_TIME_CURRENT_TIME); void selectInput(uint32_t events); void kill(); operator xcb_window_t() const; private: xcb_window_t doCreate(const QRect &geometry, uint16_t windowClass, uint32_t mask = 0, const uint32_t *values = NULL, xcb_window_t parent = rootWindow()); void destroy(); xcb_window_t m_window; bool m_destroy; QRect m_logicGeometry; }; inline Window::Window(xcb_window_t window, bool destroy) : m_window(window) , m_destroy(destroy) { } inline Window::Window(const QRect &geometry, uint32_t mask, const uint32_t *values, xcb_window_t parent) : m_window(doCreate(geometry, XCB_COPY_FROM_PARENT, mask, values, parent)) , m_destroy(true) { } inline Window::Window(const QRect &geometry, uint16_t windowClass, uint32_t mask, const uint32_t *values, xcb_window_t parent) : m_window(doCreate(geometry, windowClass, mask, values, parent)) , m_destroy(true) { } inline Window::~Window() { destroy(); } inline void Window::destroy() { if (!isValid() || !m_destroy) { return; } xcb_destroy_window(connection(), m_window); m_window = XCB_WINDOW_NONE; } inline bool Window::isValid() const { return m_window != XCB_WINDOW_NONE; } inline Window::operator xcb_window_t() const { return m_window; } inline void Window::create(const QRect &geometry, uint16_t windowClass, uint32_t mask, const uint32_t *values, xcb_window_t parent) { destroy(); m_window = doCreate(geometry, windowClass, mask, values, parent); } inline void Window::create(const QRect &geometry, uint32_t mask, const uint32_t *values, xcb_window_t parent) { create(geometry, XCB_COPY_FROM_PARENT, mask, values, parent); } inline xcb_window_t Window::doCreate(const QRect &geometry, uint16_t windowClass, uint32_t mask, const uint32_t *values, xcb_window_t parent) { m_logicGeometry = geometry; xcb_window_t w = xcb_generate_id(connection()); xcb_create_window(connection(), XCB_COPY_FROM_PARENT, w, parent, geometry.x(), geometry.y(), geometry.width(), geometry.height(), 0, windowClass, XCB_COPY_FROM_PARENT, mask, values); return w; } inline void Window::reset(xcb_window_t window, bool shouldDestroy) { destroy(); m_window = window; m_destroy = shouldDestroy; } inline void Window::setGeometry(const QRect &geometry) { setGeometry(geometry.x(), geometry.y(), geometry.width(), geometry.height()); } inline void Window::setGeometry(uint32_t x, uint32_t y, uint32_t width, uint32_t height) { m_logicGeometry.setRect(x, y, width, height); if (!isValid()) { return; } const uint16_t mask = XCB_CONFIG_WINDOW_X | XCB_CONFIG_WINDOW_Y | XCB_CONFIG_WINDOW_WIDTH | XCB_CONFIG_WINDOW_HEIGHT; const uint32_t values[] = { x, y, width, height }; xcb_configure_window(connection(), m_window, mask, values); } inline void Window::move(const QPoint &pos) { move(pos.x(), pos.y()); } inline void Window::move(uint32_t x, uint32_t y) { m_logicGeometry.moveTo(x, y); if (!isValid()) { return; } moveWindow(m_window, x, y); } inline void Window::resize(const QSize &size) { resize(size.width(), size.height()); } inline void Window::resize(uint32_t width, uint32_t height) { m_logicGeometry.setSize(QSize(width, height)); if (!isValid()) { return; } const uint16_t mask = XCB_CONFIG_WINDOW_WIDTH | XCB_CONFIG_WINDOW_HEIGHT; const uint32_t values[] = { width, height }; xcb_configure_window(connection(), m_window, mask, values); } inline void Window::raise() { const uint32_t values[] = { XCB_STACK_MODE_ABOVE }; xcb_configure_window(connection(), m_window, XCB_CONFIG_WINDOW_STACK_MODE, values); } inline void Window::lower() { lowerWindow(m_window); } inline void Window::map() { if (!isValid()) { return; } xcb_map_window(connection(), m_window); } inline void Window::unmap() { if (!isValid()) { return; } xcb_unmap_window(connection(), m_window); } inline void Window::reparent(xcb_window_t parent, int x, int y) { if (!isValid()) { return; } xcb_reparent_window(connection(), m_window, parent, x, y); } inline void Window::changeProperty(xcb_atom_t property, xcb_atom_t type, uint8_t format, uint32_t lenght, const void *data, uint8_t mode) { if (!isValid()) { return; } xcb_change_property(connection(), mode, m_window, property, type, format, lenght, data); } inline void Window::deleteProperty(xcb_atom_t property) { if (!isValid()) { return; } xcb_delete_property(connection(), m_window, property); } inline void Window::setBorderWidth(uint32_t width) { if (!isValid()) { return; } xcb_configure_window(connection(), m_window, XCB_CONFIG_WINDOW_BORDER_WIDTH, &width); } inline void Window::grabButton(uint8_t pointerMode, uint8_t keyboardmode, uint16_t modifiers, uint8_t button, uint16_t eventMask, xcb_window_t confineTo, xcb_cursor_t cursor, bool ownerEvents) { if (!isValid()) { return; } xcb_grab_button(connection(), ownerEvents, m_window, eventMask, pointerMode, keyboardmode, confineTo, cursor, button, modifiers); } inline void Window::ungrabButton(uint16_t modifiers, uint8_t button) { if (!isValid()) { return; } xcb_ungrab_button(connection(), button, m_window, modifiers); } inline void Window::clear() { if (!isValid()) { return; } xcb_clear_area(connection(), false, m_window, 0, 0, 0, 0); } inline void Window::setBackgroundPixmap(xcb_pixmap_t pixmap) { if (!isValid()) { return; } const uint32_t values[] = {pixmap}; xcb_change_window_attributes(connection(), m_window, XCB_CW_BACK_PIXMAP, values); } inline void Window::defineCursor(xcb_cursor_t cursor) { Xcb::defineCursor(m_window, cursor); } inline void Window::focus(uint8_t revertTo, xcb_timestamp_t time) { setInputFocus(m_window, revertTo, time); } inline void Window::selectInput(uint32_t events) { Xcb::selectInput(m_window, events); } inline void Window::kill() { xcb_kill_client(connection(), m_window); } // helper functions static inline void moveResizeWindow(WindowId window, const QRect &geometry) { const uint16_t mask = XCB_CONFIG_WINDOW_X | XCB_CONFIG_WINDOW_Y | XCB_CONFIG_WINDOW_WIDTH | XCB_CONFIG_WINDOW_HEIGHT; const uint32_t values[] = { static_cast(geometry.x()), static_cast(geometry.y()), static_cast(geometry.width()), static_cast(geometry.height()) }; xcb_configure_window(connection(), window, mask, values); } static inline void moveWindow(xcb_window_t window, const QPoint& pos) { moveWindow(window, pos.x(), pos.y()); } static inline void moveWindow(xcb_window_t window, uint32_t x, uint32_t y) { const uint16_t mask = XCB_CONFIG_WINDOW_X | XCB_CONFIG_WINDOW_Y; const uint32_t values[] = { x, y }; xcb_configure_window(connection(), window, mask, values); } static inline void lowerWindow(xcb_window_t window) { const uint32_t values[] = { XCB_STACK_MODE_BELOW }; xcb_configure_window(connection(), window, XCB_CONFIG_WINDOW_STACK_MODE, values); } static inline WindowId createInputWindow(const QRect &geometry, uint32_t mask, const uint32_t *values) { WindowId window = xcb_generate_id(connection()); xcb_create_window(connection(), 0, window, rootWindow(), geometry.x(), geometry.y(), geometry.width(), geometry.height(), 0, XCB_WINDOW_CLASS_INPUT_ONLY, XCB_COPY_FROM_PARENT, mask, values); return window; } static inline void restackWindows(const QVector &windows) { if (windows.count() < 2) { // only one window, nothing to do return; } for (int i=1; i &windows) { if (windows.isEmpty()) { return; } const uint32_t values[] = { XCB_STACK_MODE_ABOVE }; xcb_configure_window(connection(), windows.first(), XCB_CONFIG_WINDOW_STACK_MODE, values); restackWindows(windows); } static inline int defaultDepth() { static int depth = 0; if (depth != 0) { return depth; } int screen = Application::x11ScreenNumber(); for (xcb_screen_iterator_t it = xcb_setup_roots_iterator(xcb_get_setup(connection())); it.rem; --screen, xcb_screen_next(&it)) { if (screen == 0) { depth = it.data->root_depth; break; } } return depth; } static inline xcb_rectangle_t fromQt(const QRect &rect) { xcb_rectangle_t rectangle; rectangle.x = rect.x(); rectangle.y = rect.y(); rectangle.width = rect.width(); rectangle.height = rect.height(); return rectangle; } static inline QVector regionToRects(const QRegion ®ion) { const QVector regionRects = region.rects(); QVector rects(regionRects.count()); for (int i=0; i sync(xcb_get_input_focus_reply(c, cookie, &error)); if (error) { free(error); } } void selectInput(xcb_window_t window, uint32_t events) { xcb_change_window_attributes(connection(), window, XCB_CW_EVENT_MASK, &events); } /** * @brief Small helper class to encapsulate SHM related functionality. * */ class Shm { public: Shm(); ~Shm(); int shmId() const; void *buffer() const; xcb_shm_seg_t segment() const; bool isValid() const; uint8_t pixmapFormat() const; private: bool init(); int m_shmId; void *m_buffer; xcb_shm_seg_t m_segment; bool m_valid; uint8_t m_pixmapFormat; }; inline void *Shm::buffer() const { return m_buffer; } inline bool Shm::isValid() const { return m_valid; } inline xcb_shm_seg_t Shm::segment() const { return m_segment; } inline int Shm::shmId() const { return m_shmId; } inline uint8_t Shm::pixmapFormat() const { return m_pixmapFormat; } } // namespace X11 } // namespace KWin #endif // KWIN_X11_UTILS_H