701 lines
21 KiB
C++
701 lines
21 KiB
C++
/********************************************************************
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KWin - the KDE window manager
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This file is part of the KDE project.
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Copyright (C) 2012, 2013 Martin Gräßlin <mgraesslin@kde.org>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*********************************************************************/
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#ifndef KWIN_XCB_UTILS_H
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#define KWIN_XCB_UTILS_H
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#include <kwinglobals.h>
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#include "utils.h"
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#include <QRect>
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#include <QRegion>
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#include <QVector>
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#include <xcb/xcb.h>
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#include <xcb/composite.h>
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namespace KWin {
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namespace Xcb {
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typedef xcb_window_t WindowId;
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// forward declaration of methods
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static void defineCursor(xcb_window_t window, xcb_cursor_t cursor);
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static void setInputFocus(xcb_window_t window, uint8_t revertTo = XCB_INPUT_FOCUS_POINTER_ROOT, xcb_timestamp_t time = xTime());
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static void moveWindow(xcb_window_t window, const QPoint &pos);
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static void moveWindow(xcb_window_t window, uint32_t x, uint32_t y);
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template <typename Reply,
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typename Cookie,
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Reply *(*replyFunc)(xcb_connection_t*, Cookie, xcb_generic_error_t**),
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Cookie (*requestFunc)(xcb_connection_t*, xcb_window_t)>
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class Wrapper
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{
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public:
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Wrapper()
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: m_retrieved(false)
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, m_window(XCB_WINDOW_NONE)
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, m_reply(NULL)
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{
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m_cookie.sequence = 0;
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}
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explicit Wrapper(WindowId window)
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: m_retrieved(false)
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, m_cookie(requestFunc(connection(), window))
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, m_window(window)
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, m_reply(NULL)
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{
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}
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explicit Wrapper(const Wrapper &other)
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: m_retrieved(other.m_retrieved)
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, m_cookie(other.m_cookie)
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, m_window(other.m_window)
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, m_reply(NULL)
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{
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takeFromOther(const_cast<Wrapper&>(other));
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}
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virtual ~Wrapper() {
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cleanup();
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}
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inline Wrapper &operator=(const Wrapper &other) {
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if (this != &other) {
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// if we had managed a reply, free it
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cleanup();
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// copy members
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m_retrieved = other.m_retrieved;
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m_cookie = other.m_cookie;
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m_window = other.m_window;
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m_reply = other.m_reply;
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// take over the responsibility for the reply pointer
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takeFromOther(const_cast<Wrapper&>(other));
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}
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return *this;
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}
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inline const Reply *operator->() {
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getReply();
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return m_reply;
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}
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inline bool isNull() {
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getReply();
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return m_reply == NULL;
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}
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inline operator bool() {
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return !isNull();
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}
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inline const Reply *data() {
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getReply();
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return m_reply;
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}
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inline WindowId window() const {
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return m_window;
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}
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inline bool isRetrieved() const {
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return m_retrieved;
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}
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/**
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* Returns the value of the reply pointer referenced by this object. The reply pointer of
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* this object will be reset to null. Calling any method which requires the reply to be valid
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* will crash.
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*
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* Callers of this function take ownership of the pointer.
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**/
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inline Reply *take() {
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getReply();
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Reply *ret = m_reply;
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m_reply = NULL;
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m_window = XCB_WINDOW_NONE;
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return ret;
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}
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protected:
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void getReply() {
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if (m_retrieved || !m_cookie.sequence) {
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return;
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}
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m_reply = replyFunc(connection(), m_cookie, NULL);
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m_retrieved = true;
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}
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private:
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inline void cleanup() {
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if (!m_retrieved && m_cookie.sequence) {
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xcb_discard_reply(connection(), m_cookie.sequence);
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} else if (m_reply) {
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free(m_reply);
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}
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}
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inline void takeFromOther(Wrapper &other) {
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if (m_retrieved) {
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m_reply = other.take();
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} else {
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//ensure that other object doesn't try to get the reply or discards it in the dtor
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other.m_retrieved = true;
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other.m_window = XCB_WINDOW_NONE;
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}
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}
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bool m_retrieved;
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Cookie m_cookie;
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WindowId m_window;
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Reply *m_reply;
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};
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typedef Wrapper<xcb_get_window_attributes_reply_t, xcb_get_window_attributes_cookie_t, &xcb_get_window_attributes_reply, &xcb_get_window_attributes_unchecked> WindowAttributes;
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typedef Wrapper<xcb_composite_get_overlay_window_reply_t, xcb_composite_get_overlay_window_cookie_t, &xcb_composite_get_overlay_window_reply, &xcb_composite_get_overlay_window_unchecked> OverlayWindow;
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class WindowGeometry : public Wrapper<xcb_get_geometry_reply_t, xcb_get_geometry_cookie_t, &xcb_get_geometry_reply, &xcb_get_geometry_unchecked>
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{
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public:
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WindowGeometry() : Wrapper<xcb_get_geometry_reply_t, xcb_get_geometry_cookie_t, &xcb_get_geometry_reply, &xcb_get_geometry_unchecked>() {}
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explicit WindowGeometry(xcb_window_t window) : Wrapper<xcb_get_geometry_reply_t, xcb_get_geometry_cookie_t, &xcb_get_geometry_reply, &xcb_get_geometry_unchecked>(window) {}
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inline QRect rect() {
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const xcb_get_geometry_reply_t *geometry = data();
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if (!geometry) {
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return QRect();
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}
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return QRect(geometry->x, geometry->y, geometry->width, geometry->height);
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}
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};
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class Tree : public Wrapper<xcb_query_tree_reply_t, xcb_query_tree_cookie_t, &xcb_query_tree_reply, &xcb_query_tree_unchecked>
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{
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public:
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explicit Tree(WindowId window) : Wrapper<xcb_query_tree_reply_t, xcb_query_tree_cookie_t, &xcb_query_tree_reply, &xcb_query_tree_unchecked>(window) {}
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inline WindowId *children() {
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return xcb_query_tree_children(data());
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}
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inline xcb_window_t parent() {
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if (isNull())
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return XCB_WINDOW_NONE;
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return (*this)->parent;
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}
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};
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inline xcb_get_input_focus_cookie_t get_input_focus(xcb_connection_t *c, xcb_window_t) {
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return xcb_get_input_focus(c);
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}
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class CurrentInput : public Wrapper<xcb_get_input_focus_reply_t, xcb_get_input_focus_cookie_t, &xcb_get_input_focus_reply, &get_input_focus>
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{
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public:
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CurrentInput() : Wrapper<xcb_get_input_focus_reply_t, xcb_get_input_focus_cookie_t, &xcb_get_input_focus_reply, &get_input_focus>(XCB_WINDOW_NONE) {}
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inline xcb_window_t window() {
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if (isNull())
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return XCB_WINDOW_NONE;
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return (*this)->focus;
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}
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};
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inline xcb_get_property_cookie_t get_transient_for(xcb_connection_t *c, xcb_window_t window)
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{
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return xcb_get_property_unchecked(c, 0, window, XCB_ATOM_WM_TRANSIENT_FOR, XCB_ATOM_WINDOW, 0, 1);
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}
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class TransientFor : public Wrapper<xcb_get_property_reply_t, xcb_get_property_cookie_t, &xcb_get_property_reply, &get_transient_for>
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{
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public:
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explicit TransientFor(WindowId window) : Wrapper<xcb_get_property_reply_t, xcb_get_property_cookie_t, &xcb_get_property_reply, &get_transient_for>(window) {}
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/**
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* @brief Fill given window pointer with the WM_TRANSIENT_FOR property of a window.
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* @param prop WM_TRANSIENT_FOR property value.
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* @returns @c true on success, @c false otherwise
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**/
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inline bool getTransientFor(WindowId *prop) {
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if (isNull()) {
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return false;
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}
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const xcb_get_property_reply_t *reply = data();
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if (!reply || reply->type != XCB_ATOM_WINDOW || reply->format != 32 || reply->length == 0)
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return false;
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*prop = *reinterpret_cast<WindowId *>(xcb_get_property_value(reply));
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return true;
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}
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};
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class ExtensionData
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{
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public:
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ExtensionData();
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int version;
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int eventBase;
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int errorBase;
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int majorOpcode;
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bool present;
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QByteArray name;
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};
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class Extensions
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{
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public:
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bool isShapeAvailable() const {
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return m_shape.version > 0;
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}
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bool isShapeInputAvailable() const;
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int shapeNotifyEvent() const;
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bool hasShape(xcb_window_t w) const;
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bool isRandrAvailable() const {
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return m_randr.present;
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}
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int randrNotifyEvent() const;
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bool isDamageAvailable() const {
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return m_damage.present;
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}
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int damageNotifyEvent() const;
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bool isCompositeAvailable() const {
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return m_composite.version > 0;
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}
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bool isCompositeOverlayAvailable() const;
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bool isRenderAvailable() const {
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return m_render.version > 0;
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}
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bool isFixesAvailable() const {
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return m_fixes.version > 0;
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}
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int fixesCursorNotifyEvent() const;
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bool isFixesRegionAvailable() const;
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bool isSyncAvailable() const {
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return m_sync.present;
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}
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int syncAlarmNotifyEvent() const;
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QVector<ExtensionData> extensions() const;
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static Extensions *self();
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static void destroy();
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private:
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Extensions();
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~Extensions();
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void init();
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template <typename reply, typename T, typename F>
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void initVersion(T cookie, F f, ExtensionData *dataToFill);
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void extensionQueryReply(const xcb_query_extension_reply_t *extension, ExtensionData *dataToFill);
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ExtensionData m_shape;
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ExtensionData m_randr;
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ExtensionData m_damage;
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ExtensionData m_composite;
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ExtensionData m_render;
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ExtensionData m_fixes;
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ExtensionData m_sync;
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static Extensions *s_self;
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};
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/**
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* This class is an RAII wrapper for an xcb_window_t. An xcb_window_t hold by an instance of this class
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* will be freed when the instance gets destroyed.
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*
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* Furthermore the class provides wrappers around some xcb methods operating on an xcb_window_t.
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**/
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class Window
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{
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public:
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/**
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* Takes over responsibility of @p window. If @p window is not provided an invalid Window is
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* created. Use @link create to set an xcb_window_t later on.
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* @param window The window to manage.
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**/
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Window(xcb_window_t window = XCB_WINDOW_NONE);
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/**
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* Creates an xcb_window_t and manages it. It's a convenient method to create a window with
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* depth, class and visual being copied from parent and border being @c 0.
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* @param geometry The geometry for the window to be created
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* @param mask The mask for the values
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* @param values The values to be passed to xcb_create_window
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* @param parent The parent window
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**/
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Window(const QRect &geometry, uint32_t mask = 0, const uint32_t *values = NULL, xcb_window_t parent = rootWindow());
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/**
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* Creates an xcb_window_t and manages it. It's a convenient method to create a window with
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* depth and visual being copied from parent and border being @c 0.
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* @param geometry The geometry for the window to be created
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* @param class The window class
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* @param mask The mask for the values
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* @param values The values to be passed to xcb_create_window
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* @param parent The parent window
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**/
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Window(const QRect &geometry, uint16_t windowClass, uint32_t mask = 0, const uint32_t *values = NULL, xcb_window_t parent = rootWindow());
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~Window();
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/**
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* Creates a new window for which the responsibility is taken over. If a window had been managed
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* before it is freed.
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*
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* Depth, class and visual are being copied from parent and border is @c 0.
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* @param geometry The geometry for the window to be created
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* @param mask The mask for the values
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* @param values The values to be passed to xcb_create_window
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* @param parent The parent window
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**/
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void create(const QRect &geometry, uint32_t mask = 0, const uint32_t *values = NULL, xcb_window_t parent = rootWindow());
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/**
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* Creates a new window for which the responsibility is taken over. If a window had been managed
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* before it is freed.
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*
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* Depth and visual are being copied from parent and border is @c 0.
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* @param geometry The geometry for the window to be created
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* @param class The window class
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* @param mask The mask for the values
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* @param values The values to be passed to xcb_create_window
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* @param parent The parent window
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**/
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void create(const QRect &geometry, uint16_t windowClass, uint32_t mask = 0, const uint32_t *values = NULL, xcb_window_t parent = rootWindow());
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/**
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* Frees the existing window and starts to manage the new @p window.
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**/
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void reset(xcb_window_t window = XCB_WINDOW_NONE);
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/**
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* @returns @c true if a window is managed, @c false otherwise.
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**/
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bool isValid() const;
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/**
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* Configures the window with a new geometry.
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* @param geometry The new window geometry to be used
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**/
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void setGeometry(const QRect &geometry);
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void setGeometry(uint32_t x, uint32_t y, uint32_t width, uint32_t height);
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void move(const QPoint &pos);
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void move(uint32_t x, uint32_t y);
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void resize(const QSize &size);
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void resize(uint32_t width, uint32_t height);
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void raise();
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void map();
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void unmap();
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/**
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* Clears the window area. Same as xcb_clear_area with x, y, width, height being @c 0.
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**/
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void clear();
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void setBackgroundPixmap(xcb_pixmap_t pixmap);
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void defineCursor(xcb_cursor_t cursor);
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void focus(uint8_t revertTo = XCB_INPUT_FOCUS_POINTER_ROOT, xcb_timestamp_t time = xTime());
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operator xcb_window_t() const;
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private:
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Window(const Window &other);
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xcb_window_t doCreate(const QRect &geometry, uint16_t windowClass, uint32_t mask = 0, const uint32_t *values = NULL, xcb_window_t parent = rootWindow());
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void destroy();
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xcb_window_t m_window;
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};
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inline
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Window::Window(xcb_window_t window)
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: m_window(window)
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{
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}
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inline
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Window::Window(const QRect &geometry, uint32_t mask, const uint32_t *values, xcb_window_t parent)
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: m_window(doCreate(geometry, XCB_COPY_FROM_PARENT, mask, values, parent))
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{
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}
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inline
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Window::Window(const QRect &geometry, uint16_t windowClass, uint32_t mask, const uint32_t *values, xcb_window_t parent)
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: m_window(doCreate(geometry, windowClass, mask, values, parent))
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{
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}
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inline
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Window::~Window()
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{
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destroy();
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}
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inline
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void Window::destroy()
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{
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if (!isValid()) {
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return;
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}
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xcb_destroy_window(connection(), m_window);
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m_window = XCB_WINDOW_NONE;
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}
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inline
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bool Window::isValid() const
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{
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return m_window != XCB_WINDOW_NONE;
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}
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inline
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Window::operator xcb_window_t() const
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{
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return m_window;
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}
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inline
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void Window::create(const QRect &geometry, uint16_t windowClass, uint32_t mask, const uint32_t *values, xcb_window_t parent)
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{
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destroy();
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m_window = doCreate(geometry, windowClass, mask, values, parent);
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}
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inline
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void Window::create(const QRect &geometry, uint32_t mask, const uint32_t *values, xcb_window_t parent)
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{
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create(geometry, XCB_COPY_FROM_PARENT, mask, values, parent);
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}
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inline
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xcb_window_t Window::doCreate(const QRect &geometry, uint16_t windowClass, uint32_t mask, const uint32_t *values, xcb_window_t parent)
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{
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xcb_window_t w = xcb_generate_id(connection());
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xcb_create_window(connection(), XCB_COPY_FROM_PARENT, w, parent,
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geometry.x(), geometry.y(), geometry.width(), geometry.height(),
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0, windowClass, XCB_COPY_FROM_PARENT, mask, values);
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return w;
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}
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inline
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void Window::reset(xcb_window_t window)
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{
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destroy();
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m_window = window;
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}
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inline
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void Window::setGeometry(const QRect &geometry)
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{
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setGeometry(geometry.x(), geometry.y(), geometry.width(), geometry.height());
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}
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inline
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void Window::setGeometry(uint32_t x, uint32_t y, uint32_t width, uint32_t height)
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{
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if (!isValid()) {
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return;
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}
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const uint16_t mask = XCB_CONFIG_WINDOW_X | XCB_CONFIG_WINDOW_Y | XCB_CONFIG_WINDOW_WIDTH | XCB_CONFIG_WINDOW_HEIGHT;
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const uint32_t values[] = { x, y, width, height };
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xcb_configure_window(connection(), m_window, mask, values);
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}
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inline
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void Window::move(const QPoint &pos)
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{
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move(pos.x(), pos.y());
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}
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inline
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void Window::move(uint32_t x, uint32_t 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)
|
|
{
|
|
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::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::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);
|
|
}
|
|
|
|
// 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 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 = QX11Info::appScreen();
|
|
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 ®ion)
|
|
{
|
|
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);
|
|
}
|
|
|
|
} // namespace X11
|
|
|
|
} // namespace KWin
|
|
#endif // KWIN_X11_UTILS_H
|