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//===========================================
// Lumina-DE source code
// Copyright (c) 2017, Ken Moore
// Available under the 3-clause BSD license
// See the LICENSE file for full details
//===========================================
// This is the XCB version of the NativeWindowSystem class,
// used for interacting with the X11 display system on BSD/Linux/Unix systems
//===========================================
#include "NativeWindowSystem.h"
//Additional Qt includes
#include <QX11Info>
#include <QDebug>
//XCB Library functions
#include <xcb/xcb_ewmh.h>
//XCB Library includes
#include <xcb/xcb.h>
#include <xcb/xcb_atom.h>
#include <xcb/xproto.h>
#include <xcb/xcb_ewmh.h>
#include <xcb/xcb_icccm.h>
#include <xcb/xcb_image.h>
#include <xcb/xcb_aux.h>
#include <xcb/composite.h>
#include <xcb/damage.h>
//XLib includes (XCB Damage lib does not appear to register for damage events properly)
#include <X11/extensions/Xdamage.h>
//SYSTEM TRAY STANDARD DEFINITIONS
#define _NET_SYSTEM_TRAY_ORIENTATION_HORZ 0
#define _NET_SYSTEM_TRAY_ORIENTATION_VERT 1
#define SYSTEM_TRAY_REQUEST_DOCK 0
#define SYSTEM_TRAY_BEGIN_MESSAGE 1
#define SYSTEM_TRAY_CANCEL_MESSAGE 2
#define URGENCYHINT (1L << 8) //For window urgency detection
#define ROOT_WIN_EVENT_MASK (XCB_EVENT_MASK_SUBSTRUCTURE_REDIRECT | \
XCB_EVENT_MASK_BUTTON_PRESS | \
XCB_EVENT_MASK_STRUCTURE_NOTIFY | \
XCB_EVENT_MASK_SUBSTRUCTURE_REDIRECT | \
XCB_EVENT_MASK_SUBSTRUCTURE_NOTIFY | \
XCB_EVENT_MASK_POINTER_MOTION | \
XCB_EVENT_MASK_PROPERTY_CHANGE | \
XCB_EVENT_MASK_FOCUS_CHANGE | \
XCB_EVENT_MASK_ENTER_WINDOW)
//Internal XCB private objects class
class NativeWindowSystem::p_objects{
public:
xcb_ewmh_connection_t EWMH; //This is where all the screen info and atoms are located
QHash<QString, xcb_atom_t> ATOMS;
xcb_screen_t *root_screen;
xcb_window_t root_window, wm_window, tray_window;
//Functions for setting up these objects as needed
bool init_ATOMS(){
QStringList atoms;
atoms << "WM_TAKE_FOCUS" << "WM_DELETE_WINDOW" << "WM_PROTOCOLS" << "WM_CHANGE_STATE" << "_NET_SYSTEM_TRAY_OPCODE" << "_NET_SYSTEM_TRAY_ORIENTATION" << "_NET_SYSTEM_TRAY_VISUAL" << QString("_NET_SYSTEM_TRAY_S%1").arg(QString::number(QX11Info::appScreen()));
//Create all the requests for the atoms
QList<xcb_intern_atom_reply_t*> reply;
for(int i=0; i<atoms.length(); i++){
reply << xcb_intern_atom_reply(QX11Info::connection(), \
xcb_intern_atom(QX11Info::connection(), 0, atoms[i].length(), atoms[i].toLocal8Bit()), NULL);
}
//Now evaluate all the requests and save the atoms
for(int i=0; i<reply.length(); i++){ //NOTE: this will always be the same length as the "atoms" list
if(reply[i]!=0){
obj->ATOMS.insert(atoms[i], reply[i]->atom);
free(reply[i]); //done with this reply
}else{
//Invalid atom - could not be created
qDebug() << "Could not initialize XCB atom:" << atoms[i];
}
} //loop over reply
return (obj->ATOMS.keys.length() == atoms.length());
}
bool register_wm(){
uint32_t value_list[1] = {ROOT_WIN_EVENT_MASK};
xcb_generic_error_t *status = xcb_request_check( QX11Info::connection(), xcb_change_window_attributes_checked(QX11Info::connection(), root_window, XCB_CW_EVENT_MASK, value_list));
if(status!=0){ return false; }
uint32_t params[] = {1};
wm_window = xcb_generate_id(QX11Info::connection()); //need a new ID
xcb_create_window(QX11Info::connection(), root_screen->root_depth, \
win, root_window, -1, -1, 1, 1, 0, \
XCB_WINDOW_CLASS_INPUT_OUTPUT, root_screen->root_visual, \
XCB_CW_OVERRIDE_REDIRECT, params);
if(wm_window==0){ return false; }
//Set the _NET_SUPPORTING_WM property on the root window first
xcb_ewmh_set_supporting_wm_check(&EWMH, root_window, wm_window);
//Also set this property on the child window (pointing to itself)
xcb_ewmh_set_supporting_wm_check(&EWMH, wm_window, wm_window);
//Now also setup the root event mask on the wm_window
status = xcb_request_check( QX11Info::connection(), xcb_change_window_attributes_checked(QX11Info::connection(), wm_window, XCB_CW_EVENT_MASK, value_list));
if(status!=0){ return false; }
return true;
}
bool startSystemTray{
xcb_atom_t _NET_SYSTEM_TRAY_S = ATOMS.value(QString("_NET_SYSTEM_TRAY_S%1").arg(QString::number(QX11Info::appScreen())) );
//Make sure that there is no other system tray running
xcb_get_selection_owner_reply_t *ownreply = xcb_get_selection_owner_reply(QX11Info::connection(), \
xcb_get_selection_owner_unchecked(QX11Info::connection(), _NET_SYSTEM_TRAY_S), NULL);
if(ownreply==0){
qWarning() << " - Could not get owner selection reply";
return false;
}else if(ownreply->owner != 0){
free(ownreply);
qWarning() << " - An alternate system tray is currently in use";
return false;
}
free(ownreply);
//Now create the window to use (just offscreen)
//TODO
}
}; //end private objects class
//inline functions for setting up the internal objects
// === PUBLIC ===
NativeWindowSystem::NativeWindowSystem() : QObject(){
obj = 0;
}
NativeWindowSystem::~NativeWindowSystem(){
xcb_ewmh_connection_wipe(obj->EWMH);
free(obj);
}
//Overarching start/stop functions
bool NativeWindowSystem::start(){
//Initialize the XCB/EWMH objects
if(obj==0){
obj = new p_objects(); } //instantiate the private objects
obj->wm_window = 0;
obj->tray_window = 0;
xcb_intern_atom_cookie_t *cookie = xcb_ewmh_init_atoms(QX11Info::connection(), &obj->EWMH);
if(!xcb_ewmh_init_atoms_replies(&obj->EWMH, cookie, NULL) ){
qDebug() << "Error with XCB atom initializations";
return false;
}
obj->root_screen = xcb_aux_get_screen(QX11Info::connection(), QX11Info::appScreen());
obj->root_window = obj->root_screen->root; //simplification for later - minor duplication of memory (unsigned int)
//Initialize all the extra atoms that the EWMH object does not have
if( !obj->init_ATOMS() ){ return false; }
} //Done with private object init
bool ok = obj->register_wm();
if(ok){ ok = obj->startSystemTray(); }
return ok;
}
void NativeWindowSystem::stop(){
}
// === PRIVATE ===
void NativeWindowSystem::UpdateWindowProperties(NativeWindow* win, QList< NativeWindow::Property > props){
}
// === PUBLIC SLOTS ===
//These are the slots which are only used by the desktop system itself or the NativeWindowEventFilter
void NativeWindowSystem::RegisterVirtualRoot(WId){
}
//NativeWindowEventFilter interactions
void NativeWindowSystem::NewWindowDetected(WId){
}
void NativeWindowSystem::NewTrayWindowDetected(WId){
}
void NativeWindowSystem::WindowCloseDetected(WId){
}
void NativeWindowSystem::WindowPropertyChanged(WId, NativeWindow::Property){
}
void NativeWindowSystem::NewKeyPress(int keycode){
}
void NativeWindowSystem::NewKeyRelease(int keycode){
}
void NativeWindowSystem::NewMousePress(int buttoncode){
}
void NativeWindowSystem::NewMouseRelease(int buttoncode){
}
// === PRIVATE SLOTS ===
//These are the slots which are built-in and automatically connected when a new NativeWindow is created
void NativeWindowSystem::RequestPropertiesChange(WId win, QList<NativeWindow::Property> props, QList<QVariant> vals){
//Find the window object associated with this id
bool istraywin = false; //just in case we care later if it is a tray window or a regular window
NativeWindow *WIN = findWindow(win);
if(WIN==0){ istraywin = true; WIN = findTrayWindow(win); }
if(WIN==0){ return; } //invalid window ID - no longer available
//Now make any changes as needed
}
void NativeWindowSystem::RequestActivate(WId){
}
void NativeWindowSystem::RequestClose(WId){
}
void NativeWindowSystem::RequestSetVisible(WId, bool){
}
void NativeWindowSystem::RequestSetGeometry(WId, QRect){
}
void NativeWindowSystem::RequestSetFrameExtents(WId, QList<int>){
//[Left,Top,Right,Bottom] in pixels
}
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