aboutsummaryrefslogtreecommitdiff
path: root/src/CommandParser.cc
blob: dc2f2973cb7623b78f8ff808ee5f7cefc664be30 (plain)
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
// CommandParser.cc for Fluxbox - an X11 Window manager
// Copyright (c) 2003 Henrik Kinnunen (fluxgen{<a*t>}users.sourceforge.net)
//                and Simon Bowden (rathnor at users.sourceforge.net)
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the "Software"),
// to deal in the Software without restriction, including without limitation
// the rights to use, copy, modify, merge, publish, distribute, sublicense,
// and/or sell copies of the Software, and to permit persons to whom the
// Software is furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
// THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
// DEALINGS IN THE SOFTWARE.

// $Id: CommandParser.cc,v 1.1 2003/06/30 14:44:43 fluxgen Exp $

#include "CommandParser.hh"

#include "StringUtil.hh"

#include <vector>
#include <iostream>
#include <iterator>
using namespace std;
namespace {

string::size_type removeFirstWhitespace(std::string &str) {
    string::size_type first_pos = str.find_first_not_of(" \t");
    if (first_pos != string::npos)
        str.erase(0, first_pos);
    return first_pos;
}

}; // end anonymous namespace

CommandFactory::CommandFactory() {

}

CommandFactory::~CommandFactory() {
    // remove all associations with this factory
    CommandParser::instance().removeAssociation(*this);
}

void CommandFactory::addCommand(const std::string &command_name) {
    CommandParser::instance().associateCommand(command_name, *this);
}

CommandParser &CommandParser::instance() {
    static CommandParser singleton;
    return singleton;
}

FbTk::Command *CommandParser::parseLine(const std::string &line) {
    
    // parse arguments and command
    string command = line;
    string arguments;
    string::size_type first_pos = removeFirstWhitespace(command);
    string::size_type second_pos = command.find_first_of(" \t", first_pos);
    if (second_pos != string::npos) {
        // ok we have arguments, parsing them here
        arguments = command.substr(second_pos);
        removeFirstWhitespace(arguments);
        command.erase(second_pos); // remove argument from command                
    }

    // now we have parsed command and arguments
#ifdef DEBUG
    cerr<<__FILE__<<"("<<__FUNCTION__<<"): command = ["<<
      command<<"] arguments=["<<arguments<<"]"<<endl;
#endif // DEBUG

    FbTk::StringUtil::toLower(command);

    // we didn't find any matching command in default commands,
    // so we search in the command creators modules for a matching command string
    return toCommand(command, arguments);

}

ostream &operator << (ostream &the_stream, const CommandParser::CommandFactoryMap::value_type &value) {
    the_stream<<value.first;
    return the_stream;
}

void CommandParser::showCommands(std::ostream &the_stream) const {
    // copy command strings to stream
    copy(m_commandfactorys.begin(),
         m_commandfactorys.end(),
         ostream_iterator<CommandFactoryMap::value_type>(the_stream, "\n"));
}

FbTk::Command *CommandParser::toCommand(const std::string &command_str, const std::string &arguments) {
    if (m_commandfactorys[command_str] != 0)
        return m_commandfactorys[command_str]->stringToCommand(command_str, arguments);

    return 0;
}

void CommandParser::associateCommand(const std::string &command, CommandFactory &factory) {
    // we shouldnt override other commands
    if (m_commandfactorys[command] != 0)
        return;

    m_commandfactorys[command] = &factory;
}

void CommandParser::removeAssociation(CommandFactory &factory) {
    std::vector<std::string> commands; // commands that are associated with the factory
    // find associations
    CommandFactoryMap::iterator factory_it = m_commandfactorys.begin();
    const CommandFactoryMap::iterator factory_it_end = m_commandfactorys.end();
    for (; factory_it != factory_it_end; ++factory_it) {
        if ((*factory_it).second == &factory)
            commands.push_back((*factory_it).first);
    }
    // remove all associations
    while (!commands.empty()) {
        m_commandfactorys.erase(commands.back());
        commands.pop_back();
    }
}