xkblayout-state/wrapper.cpp

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2010-01-03 05:02:57 +08:00
// wrapper.cpp
// A small wrapper program around Jay Bromley's keyboard layout information class.
//
// Compilation:
// g++ -o xkblayout-state XKeyboard.cpp wrapper.cpp -lX11
//
// This program is free software; you can redistribute it and/or modify it
// under the terms of the GNU General Public License as published by the Free
// Software Foundation; either version 2 of the License, or (at your option)
// any later version.
#include <iostream>
#include <string>
#include <cstdlib>
#include "XKeyboard.h"
using namespace std;
void print_usage(string progname)
{
cerr << endl
<< "xkblayout-state v1" << endl
<< endl
<< "Usage: " << endl
<< endl
<< "To get the current layout(s):" << endl
<< " " << progname << " print format" << endl
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<< endl
<< "This causes the 'format' string to be printed on stdout with the following substitutions:" << endl
<< " %c -> current layout number" << endl
<< " %n -> current layout name" << endl
<< " %s -> current layout symbol" << endl
<< " %v -> current layout variant" << endl
<< " %e -> current layout variant (equals to %s if %v is empty)" << endl
<< " %C -> layout count" << endl
<< " %N -> layout names (one per line)" << endl
<< " %S -> layout symbols (one per line)" << endl
<< " %V -> layout variants (one per line)" << endl
<< " %E -> layout variants (one per line; layout symbol is used if variant is empty)" << endl
<< " %% -> A literal '%'" << endl
<< endl
<< "For example:" << endl
<< " " << progname << " print \"Current layout: %s(%e)\"" << endl
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<< endl
<< "To set the current layout:" << endl
<< " " << progname << " set layout_number" << endl
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<< endl
<< "Here 'layout_number' is the number of the layout to be set (starting from 0)" << endl
<< "and can be either absolute (default) or relative (if preceded with a plus or minus sign)." << endl
<< endl
<< "For example:" << endl
<< " " << progname << " set 1" << endl
<< " " << progname << " set +1" << endl
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<< endl;
}
void print_status(XKeyboard& xkb, string format) {
for (size_t i = 0; i < format.length(); ++i) {
if (format[i] == '%' && i < format.length()-1) {
switch (format[i+1]) {
case 'c':
cout << xkb.currentGroupNum();
break;
case 'n':
cout << xkb.currentGroupName();
break;
case 's':
cout << xkb.currentGroupSymbol();
break;
case 'v':
cout << xkb.currentGroupVariant();
break;
case 'e':
if (xkb.currentGroupVariant().empty())
cout << xkb.currentGroupSymbol();
else
cout << xkb.currentGroupVariant();
break;
case 'C':
cout << xkb.groupCount();
break;
case 'N':
for (size_t j = 0; j < xkb.groupNames().size(); ++j)
cout << xkb.groupNames()[j] << endl;
break;
case 'S':
for (size_t j = 0; j < xkb.groupSymbols().size(); ++j)
cout << xkb.groupSymbols()[j] << endl;
break;
case 'V':
for (size_t j = 0; j < xkb.groupVariants().size(); ++j)
cout << xkb.groupVariants()[j] << endl;
break;
case 'E':
for (size_t j = 0; j < xkb.groupVariants().size(); ++j)
if (xkb.groupVariants()[j].empty())
cout << xkb.groupSymbols()[j] << endl;
else
cout << xkb.groupVariants()[j] << endl;
break;
default:
cout << format[i+1];
break;
}
++i;
} else { // not '%'
cout << format[i];
}
}
}
bool set_group(XKeyboard& xkb, string group) {
bool relative = (group[0] == '+' || group[0] == '-');
int group_int = atoi(group.c_str());
if (relative)
return xkb.changeGroup(group_int);
else
return xkb.setGroupByNum(group_int);
}
int main(int argc, char* argv[])
{
try {
XKeyboard xkb;
if (argc != 3) {
print_usage(string(argv[0]));
return EXIT_FAILURE;
} else {
string command(argv[1]);
if (command == "print") {
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print_status(xkb, string(argv[2]));
return EXIT_SUCCESS;
} else if (command == "set") {
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if (!set_group(xkb, string(argv[2]))) {
cerr << "Failed to set layout" << endl;
return EXIT_FAILURE;
}
} else {
print_usage(string(argv[0]));
return EXIT_FAILURE;
}
}
}
catch (exception e) {
cerr << e.what() << endl;
return EXIT_FAILURE;
}
}