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Diffstat (limited to 'x11/x11globalcomm_impl.cpp')
| -rw-r--r-- | x11/x11globalcomm_impl.cpp | 184 |
1 files changed, 184 insertions, 0 deletions
diff --git a/x11/x11globalcomm_impl.cpp b/x11/x11globalcomm_impl.cpp new file mode 100644 index 0000000..8d5e620 --- /dev/null +++ b/x11/x11globalcomm_impl.cpp @@ -0,0 +1,184 @@ +/* + Copyright (C) 1997 Mark Donohoe (donohoe@kde.org) + Copyright (C) 2000 Stefan Westerfeld (stefan@space.twc.de) + + This library is free software; you can redistribute it and/or + modify it under the terms of the GNU Library General Public + License as published by the Free Software Foundation; either + version 2 of the License, or (at your option) any later version. + + This library 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 + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public License + along with this library; see the file COPYING.LIB. If not, write to + the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, + Boston, MA 02110-1301, USA. +*/ + +/* + * This is based on Mark Donohoe's nice KRootProp class (found in + * tdelibs/tdecore/krootprop.cpp). I couldn't use KRootProp directly, since + * I wanted aRts (and even it's X11 support) to work without KDE and/or Qt + * installed at all. + */ + +#include <sys/types.h> +#include <sys/stat.h> +#include <fcntl.h> +#include <X11/Xlib.h> +#include <X11/Xatom.h> +#include "x11globalcomm.h" +#include "debug.h" +#include <iostream> + +using namespace std; +using namespace Arts; + +class X11GlobalComm_impl : virtual public X11GlobalComm_skel { +protected: + Display *X11display; + Window rootWin; + Atom atom; + map<string,string> propertyMap; + bool init; + + void warn(const char *what) + { + arts_warning("X11GlobalComm: %s", what); + } +public: + X11GlobalComm_impl() :rootWin(0), atom(0) + { + X11display = XOpenDisplay(NULL); + if(!X11display) + { + warn("Can't connect to the XServer - Initial references won't work."); + init = false; + } + else + { + rootWin = DefaultRootWindow(X11display); + atom = XInternAtom( X11display, "MCOPGLOBALS" , False); + init = true; + } + } + + ~X11GlobalComm_impl() + { + if(X11display) + XCloseDisplay(X11display); + } + + void read() + { + if(!init) return; + + Atom type; + int format; + unsigned long nitems; + unsigned long bytes_after; + long offset; + unsigned char *buf; + + propertyMap.clear(); + + // If a property has already been opened write + // the dictionary back to the root window + + string s; + offset = 0; bytes_after = 1; + while (bytes_after != 0) + { + XGetWindowProperty( X11display, rootWin, atom, offset, 256, + False, XA_STRING, &type, &format, &nitems, &bytes_after, + &buf); + + if(type == None) // no property -> no contents + return; + + s += (char*) buf; + offset += nitems/4; + if (buf) + XFree((char*) buf); + } + + // Parse through the property string stripping out key value pairs + // and putting them in the dictionary + + while(s.length() >0 ) + { + // parse the string for first key-value pair separator '\n' + int i = s.find("\n",0); + + // extract the key-values pair and remove from string + + string keypair = s.substr(0,i); + s = s.substr(i+1,s.size()-(i+1)); + + // split key and value and add to dictionary + + i = keypair.find( "=" ); + if( i != -1 ) + { + string key = keypair.substr( 0, i ); + string value = keypair.substr( i+1, keypair.size()-(i+1) ); + propertyMap[key] = value; + } + } + } + + void write() + { + if(!init) return; + + // bring map in the variable=value form with \n as seperator + string propString; + + map<string,string>::iterator i = propertyMap.begin(); + for(i = propertyMap.begin(); i != propertyMap.end(); i++) + propString += i->first + "=" + i->second + "\n"; + + // send to the X11 server + XChangeProperty( X11display, rootWin, atom, + XA_STRING, 8, PropModeReplace, + (const unsigned char *)propString.c_str(), + propString.size()+1); + XFlush(X11display); + } + + bool put(const string& variable, const string& value) + { + if(!init) return false; + + read(); + if(propertyMap[variable].empty()) + { + propertyMap[variable] = value; + write(); + return true; + } + return false; + } + + string get(const string& variable) + { + if(!init) return ""; + + read(); + return propertyMap[variable]; + } + + void erase(const string& variable) + { + if(!init) return; + + read(); + propertyMap.erase(variable); + write(); + } +}; + +REGISTER_IMPLEMENTATION(X11GlobalComm_impl); |