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kwin/xcbutils.h
Thomas Lübking 62b6401175 store logic (what we think) geometry of XCB Window 
This allows us to check and compare geometry of
system windows, no matter what the interim logic
client geometry (eg. shaded etc.) is

REVIEW: 124591
2015-08-15 01:34:41 +02:00

1887 lines
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/********************************************************************
KWin - the KDE window manager
This file is part of the KDE project.
Copyright (C) 2012, 2013 Martin Gräßlin <mgraesslin@kde.org>
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 <http://www.gnu.org/licenses/>.
*********************************************************************/
#ifndef KWIN_XCB_UTILS_H
#define KWIN_XCB_UTILS_H
#include <kwinglobals.h>
#include "main.h"
#include <QRect>
#include <QRegion>
#include <QScopedPointer>
#include <QVector>
#include <xcb/xcb.h>
#include <xcb/composite.h>
#include <xcb/randr.h>
#include <xcb/shm.h>
class TestXcbSizeHints;
namespace KWin {
template <typename T> using ScopedCPointer = QScopedPointer<T, QScopedPointerPodDeleter>;
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<GeometryData, uint8_t>
* {
* public:
* IncorrectArguments() = default;
* IncorrectArguments(xcb_window_t window) : Wrapper<GeometryData, uint8_t>(window) {}
* };
*
* // fails with "static assertion failed: Data template argument must be derived from WrapperData"
* class WrapperDataDirectly : public Wrapper<WrapperData<xcb_get_geometry_reply_t, xcb_get_geometry_request_t, xcb_drawable_t>, xcb_drawable_t>
* {
* public:
* WrapperDataDirectly() = default;
* WrapperDataDirectly(xcb_window_t window) : Wrapper<WrapperData<xcb_get_geometry_reply_t, xcb_get_geometry_request_t, xcb_drawable_t>, 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<xcb_drawable_t> 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<FakeWrapperData, xcb_drawable_t>
* {
* public:
* NotDerivedFromWrapperData() = default;
* NotDerivedFromWrapperData(xcb_window_t window) : Wrapper<FakeWrapperData, xcb_drawable_t>(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 <typename Reply,
typename Cookie,
typename... Args>
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<Args...> 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 <typename Reply,
typename Cookie>
struct WrapperData<Reply, Cookie>
{
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<typename Data>
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<AbstractWrapper&>(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<AbstractWrapper*>(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<AbstractWrapper*>(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<AbstractWrapper&>(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 <typename T1, typename T2, std::size_t I>
struct tupleCompare
{
typedef typename std::tuple_element<I, T1>::type tuple1Type;
typedef typename std::tuple_element<I, T2>::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<T1, T2, I-1>::value;
};
/**
* @brief Recursive template case for first tuple element.
*/
template <typename T1, typename T2>
struct tupleCompare<T1, T2, 0>
{
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<typename Data, typename... Args>
class Wrapper : public AbstractWrapper<Data>
{
public:
static_assert(!std::is_same<Data, Xcb::WrapperData<typename Data::reply_type, typename Data::cookie_type, Args...> >::value,
"Data template argument must be derived from WrapperData");
static_assert(std::is_base_of<Xcb::WrapperData<typename Data::reply_type, typename Data::cookie_type, Args...>, 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<std::tuple<Args...>, typename Data::argument_types, sizeof...(Args) - 1>::value,
"Argument miss-match between Wrapper and WrapperData");
Wrapper() = default;
explicit Wrapper(Args... args)
: AbstractWrapper<Data>(XCB_WINDOW_NONE, Data::requestFunc(connection(), args...))
{
}
explicit Wrapper(xcb_window_t w, Args... args)
: AbstractWrapper<Data>(w, Data::requestFunc(connection(), args...))
{
}
};
/**
* @brief Template specialization for xcb_window_t being first variadic argument.
**/
template<typename Data, typename... Args>
class Wrapper<Data, xcb_window_t, Args...> : public AbstractWrapper<Data>
{
public:
static_assert(!std::is_same<Data, Xcb::WrapperData<typename Data::reply_type, typename Data::cookie_type, xcb_window_t, Args...> >::value,
"Data template argument must be derived from WrapperData");
static_assert(std::is_base_of<Xcb::WrapperData<typename Data::reply_type, typename Data::cookie_type, xcb_window_t, Args...>, 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<std::tuple<xcb_window_t, Args...>, 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<Data>(w, Data::requestFunc(connection(), w, args...))
{
}
};
/**
* @brief Template specialization for no variadic arguments.
*
* It's needed to prevent ambiguous constructors being generated.
**/
template<typename Data>
class Wrapper<Data> : public AbstractWrapper<Data>
{
public:
static_assert(!std::is_same<Data, Xcb::WrapperData<typename Data::reply_type, typename Data::cookie_type> >::value,
"Data template argument must be derived from WrapperData");
static_assert(std::is_base_of<Xcb::WrapperData<typename Data::reply_type, typename Data::cookie_type>, 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<Data>(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<Atom*>(this))->getReply();
return m_atom;
}
bool isValid() {
getReply();
return m_atom != XCB_ATOM_NONE;
}
bool isValid() const {
(const_cast<Atom*>(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<xcb_intern_atom_reply_t> 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<GeometryData, xcb_window_t>
{
public:
WindowGeometry() : Wrapper<GeometryData, xcb_window_t>() {}
explicit WindowGeometry(xcb_window_t window) : Wrapper<GeometryData, xcb_window_t>(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<TreeData, xcb_window_t>
{
public:
explicit Tree(WindowId window) : Wrapper<TreeData, xcb_window_t>(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<CurrentInputData>
{
public:
CurrentInput() : Wrapper<CurrentInputData>() {}
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<QueryKeymapData>
{
public:
QueryKeymap() : Wrapper<QueryKeymapData>() {}
};
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<ModifierMappingData>
{
public:
ModifierMapping() : Wrapper<ModifierMappingData>() {}
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<PropertyData, uint8_t, xcb_window_t, xcb_atom_t, xcb_atom_t, uint32_t, uint32_t>
{
public:
Property()
: Wrapper<PropertyData, uint8_t, xcb_window_t, xcb_atom_t, xcb_atom_t, uint32_t, uint32_t>()
, m_type(XCB_ATOM_NONE)
{
}
Property(const Property &other)
: Wrapper<PropertyData, uint8_t, xcb_window_t, xcb_atom_t, xcb_atom_t, uint32_t, uint32_t>(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<PropertyData, uint8_t, xcb_window_t, xcb_atom_t, xcb_atom_t, uint32_t, uint32_t>(window, _delete, window, property, type, long_offset, long_length)
, m_type(type)
{
}
Property &operator=(const Property &other) {
Wrapper<PropertyData, uint8_t, xcb_window_t, xcb_atom_t, xcb_atom_t, uint32_t, uint32_t>::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 <typename T>
inline typename std::enable_if<!std::is_pointer<T>::value, T>::type value(T defaultValue = T(), bool *ok = nullptr) {
return value<T>(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 <typename T>
inline typename std::enable_if<!std::is_pointer<T>::value, T>::type value(uint8_t format, xcb_atom_t type, T defaultValue = T(), bool *ok = nullptr) {
T *reply = value<T*>(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 <typename T>
inline typename std::enable_if<std::is_pointer<T>::value, T>::type value(T defaultValue = nullptr, bool *ok = nullptr) {
return value<T>(sizeof(typename std::remove_pointer<T>::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 <typename T>
inline typename std::enable_if<std::is_pointer<T>::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<T>(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<const char*>(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<bool*>(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<WindowId*>();
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<SizeHints*>(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<MwmHints*>(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<ScreenResourcesData, xcb_window_t>
{
public:
explicit ScreenResources(WindowId window) : Wrapper<ScreenResourcesData, xcb_window_t>(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<CrtcGammaData, xcb_randr_crtc_t>
{
public:
explicit CrtcGamma(xcb_randr_crtc_t c) : Wrapper<CrtcGammaData, xcb_randr_crtc_t>(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<CrtcInfoData, xcb_randr_crtc_t, xcb_timestamp_t>
{
public:
CrtcInfo() = default;
CrtcInfo(const CrtcInfo&) = default;
explicit CrtcInfo(xcb_randr_crtc_t c, xcb_timestamp_t t) : Wrapper<CrtcInfoData, xcb_randr_crtc_t, xcb_timestamp_t>(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<OutputInfoData, xcb_randr_output_t, xcb_timestamp_t>
{
public:
OutputInfo() = default;
OutputInfo(const OutputInfo&) = default;
explicit OutputInfo(xcb_randr_output_t c, xcb_timestamp_t t) : Wrapper<OutputInfoData, xcb_randr_output_t, xcb_timestamp_t>(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<char*>(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<CurrentResourcesData, xcb_window_t>
{
public:
explicit CurrentResources(WindowId window) : Wrapper<CurrentResourcesData, xcb_window_t>(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<QByteArray> opCodes;
QVector<QByteArray> 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<ExtensionData> 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 <typename reply, typename T, typename F>
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:
QRect m_logicGeometry;
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;
};
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<uint32_t>(geometry.x()),
static_cast<uint32_t>(geometry.y()),
static_cast<uint32_t>(geometry.width()),
static_cast<uint32_t>(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<xcb_window_t> &windows)
{
if (windows.count() < 2) {
// only one window, nothing to do
return;
}
for (int i=1; i<windows.count(); ++i) {
const uint16_t mask = XCB_CONFIG_WINDOW_SIBLING | XCB_CONFIG_WINDOW_STACK_MODE;
const uint32_t stackingValues[] = {
windows.at(i-1),
XCB_STACK_MODE_BELOW
};
xcb_configure_window(connection(), windows.at(i), mask, stackingValues);
}
}
static inline void restackWindowsWithRaise(const QVector<xcb_window_t> &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<xcb_rectangle_t> regionToRects(const QRegion &region)
{
const QVector<QRect> regionRects = region.rects();
QVector<xcb_rectangle_t> rects(regionRects.count());
for (int i=0; i<regionRects.count(); ++i) {
rects[i] = Xcb::fromQt(regionRects.at(i));
}
return rects;
}
static inline void defineCursor(xcb_window_t window, xcb_cursor_t cursor)
{
xcb_change_window_attributes(connection(), window, XCB_CW_CURSOR, &cursor);
}
static inline void setInputFocus(xcb_window_t window, uint8_t revertTo, xcb_timestamp_t time)
{
xcb_set_input_focus(connection(), revertTo, window, time);
}
static inline void setTransientFor(xcb_window_t window, xcb_window_t transient_for_window)
{
xcb_change_property(connection(), XCB_PROP_MODE_REPLACE, window, XCB_ATOM_WM_TRANSIENT_FOR,
XCB_ATOM_WINDOW, 32, 1, &transient_for_window);
}
static inline void sync()
{
auto *c = connection();
const auto cookie = xcb_get_input_focus(c);
xcb_generic_error_t *error = nullptr;
ScopedCPointer<xcb_get_input_focus_reply_t> 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
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