1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
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., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.
*/
/*
* This is based on Mark Donohoe's nice KRootProp class (found in
* kdelibs/kdecore/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);
|
