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// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
// vim: ts=8 sw=2 smarttab
#include "tools/rbd/OptionPrinter.h"
#include "tools/rbd/IndentStream.h"
namespace rbd {
namespace po = boost::program_options;
const std::string OptionPrinter::POSITIONAL_ARGUMENTS("Positional arguments");
const std::string OptionPrinter::OPTIONAL_ARGUMENTS("Optional arguments");
const size_t OptionPrinter::MAX_DESCRIPTION_OFFSET;
OptionPrinter::OptionPrinter(const OptionsDescription &positional,
const OptionsDescription &optional)
: m_positional(positional), m_optional(optional) {
}
void OptionPrinter::print_short(std::ostream &os, size_t initial_offset) {
size_t name_width = std::min(initial_offset, MAX_DESCRIPTION_OFFSET) + 1;
IndentStream indent_stream(name_width, initial_offset, LINE_WIDTH, os);
indent_stream.set_delimiter("[");
for (size_t i = 0; i < m_optional.options().size(); ++i) {
bool required = m_optional.options()[i]->semantic()->is_required();
if (!required) {
indent_stream << "[";
}
indent_stream << "--" << m_optional.options()[i]->long_name();
if (m_optional.options()[i]->semantic()->max_tokens() != 0) {
indent_stream << " <" << m_optional.options()[i]->long_name() << ">";
}
if (!required) {
indent_stream << "]";
}
indent_stream << " ";
}
if (m_optional.options().size() > 0 || m_positional.options().size() == 0) {
indent_stream << std::endl;
}
if (m_positional.options().size() > 0) {
indent_stream.set_delimiter(" ");
for (size_t i = 0; i < m_positional.options().size(); ++i) {
indent_stream << "<" << m_positional.options()[i]->long_name() << "> ";
if (m_positional.options()[i]->semantic()->max_tokens() > 1) {
indent_stream << "[<" << m_positional.options()[i]->long_name()
<< "> ...]";
break;
}
}
indent_stream << std::endl;
}
}
void OptionPrinter::print_detailed(std::ostream &os) {
std::string indent_prefix(2, ' ');
size_t name_width = compute_name_width(indent_prefix.size());
if (m_positional.options().size() > 0) {
std::cout << POSITIONAL_ARGUMENTS << std::endl;
for (size_t i = 0; i < m_positional.options().size(); ++i) {
std::stringstream ss;
ss << indent_prefix << "<" << m_positional.options()[i]->long_name()
<< ">";
std::cout << ss.str();
IndentStream indent_stream(name_width, ss.str().size(), LINE_WIDTH, os);
indent_stream << m_positional.options()[i]->description() << std::endl;
}
std::cout << std::endl;
}
if (m_optional.options().size() > 0) {
std::cout << OPTIONAL_ARGUMENTS << std::endl;
for (size_t i = 0; i < m_optional.options().size(); ++i) {
std::stringstream ss;
ss << indent_prefix
<< m_optional.options()[i]->format_name() << " "
<< m_optional.options()[i]->format_parameter();
std::cout << ss.str();
IndentStream indent_stream(name_width, ss.str().size(), LINE_WIDTH, os);
indent_stream << m_optional.options()[i]->description() << std::endl;
}
std::cout << std::endl;
}
}
size_t OptionPrinter::compute_name_width(size_t indent) {
size_t width = MIN_NAME_WIDTH;
std::vector<OptionsDescription> descs = {m_positional, m_optional};
for (size_t desc_idx = 0; desc_idx < descs.size(); ++desc_idx) {
const OptionsDescription &desc = descs[desc_idx];
for (size_t opt_idx = 0; opt_idx < desc.options().size(); ++opt_idx) {
size_t name_width = desc.options()[opt_idx]->format_name().size() +
desc.options()[opt_idx]->format_parameter().size()
+ 1;
width = std::max(width, name_width);
}
}
width += indent;
width = std::min(width, MAX_DESCRIPTION_OFFSET) + 1;
return width;
}
} // namespace rbd
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