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112 lines
2.9 KiB
C++
112 lines
2.9 KiB
C++
/***************************************************************************
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**
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** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
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** All rights reserved.
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** Contact: Nokia Corporation (directui@nokia.com)
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**
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** This file is part of applauncherd
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**
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** If you have questions regarding the use of this file, please contact
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** Nokia at directui@nokia.com.
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**
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** This library is free software; you can redistribute it and/or
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** modify it under the terms of the GNU Lesser General Public
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** License version 2.1 as published by the Free Software Foundation
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** and appearing in the file LICENSE.LGPL included in the packaging
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** of this file.
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**
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****************************************************************************/
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#include <X11/Xlib.h>
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#include <X11/Xatom.h>
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#include <cstdlib>
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using std::atoi;
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#include <iostream>
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using std::cout;
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using std::endl;
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#include <list>
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using std::list;
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class WindowsMatchingPid
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{
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public:
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WindowsMatchingPid(Display *display, Window wRoot, unsigned long pid)
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: m_display(display)
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, m_pid(pid)
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{
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// Get the PID property atom.
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m_atomPID = XInternAtom(display, "_NET_WM_PID", False);
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search(wRoot);
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}
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const list<Window> &result() const { return m_result; }
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private:
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Display *m_display;
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unsigned long m_pid;
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Atom m_atomPID;
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list<Window> m_result;
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void search(Window w)
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{
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// Get the PID for the current Window.
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Atom type;
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int format;
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unsigned long nItems;
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unsigned long bytesAfter;
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unsigned char *propPID = 0;
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if(Success == XGetWindowProperty(m_display, w, m_atomPID, 0, 1, False, XA_CARDINAL,
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&type, &format, &nItems, &bytesAfter, &propPID))
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{
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if(propPID != 0)
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{
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// If the PID matches, add this window to the result set.
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if(m_pid == *((unsigned long *)propPID))
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m_result.push_back(w);
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XFree(propPID);
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}
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}
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// Recurse into child windows.
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Window wRoot;
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Window wParent;
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Window *wChild;
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unsigned numChildren;
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if(XQueryTree(m_display, w, &wRoot, &wParent, &wChild, &numChildren) != 0)
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{
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for(unsigned i = 0; i < numChildren; i++)
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search(wChild[i]);
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}
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}
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};
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int main(int argc, char **argv)
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{
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if(argc < 2) return EXIT_FAILURE;
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const int pid = atoi(argv[1]);
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// Start with the root window.
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Display *display = XOpenDisplay(0);
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WindowsMatchingPid match(display, XDefaultRootWindow(display), pid);
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// Print the resulting window id's
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const list<Window> &result = match.result();
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for(list<Window>::const_iterator it = result.begin(); it != result.end(); it++)
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cout << "0x" << std::hex << (unsigned long)(*it) << std::dec << endl;
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return EXIT_SUCCESS;
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}
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