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#include "format.h"
#if 0
#ifdef USE_BOOST_PYTHON
#include "py_eval.h"
#endif
#endif
namespace ledger {
void format_t::parse(const string& fmt)
{
element_t * current = NULL;
char buf[1024];
char * q = buf;
if (elements.size() > 0)
clear_elements();
format_string = fmt;
for (const char * p = fmt.c_str(); *p; p++) {
if (*p != '%' && *p != '\\') {
*q++ = *p;
continue;
}
else if (*p == '\\') {
p++;
switch (*p) {
case 'b': *q++ = '\b'; break;
case 'f': *q++ = '\f'; break;
case 'n': *q++ = '\n'; break;
case 'r': *q++ = '\r'; break;
case 't': *q++ = '\t'; break;
case 'v': *q++ = '\v'; break;
default:
*q++ = *p;
break;
}
continue;
}
else {
assert(*p == '%');
if (*(p + 1) == '%') {
p++; // %% is the same as \%
*q++ = *p;
continue;
}
}
current = new element_t;
elements.push_back(current);
if (q != buf) {
current->kind = element_t::TEXT;
current->chars = new string(buf, q);
q = buf;
current = new element_t;
elements.push_back(current);
}
++p;
if (*p == '-') {
current->align_left = true;
++p;
}
if (*p && std::isdigit(*p)) {
int num = *p++ - '0';
while (*p && std::isdigit(*p)) {
num *= 10;
num += *p++ - '0';
}
current->min_width = num;
}
if (*p == '.') {
++p;
int num = 0;
while (*p && std::isdigit(*p)) {
num *= 10;
num += *p++ - '0';
}
current->max_width = num;
if (current->min_width == -1)
current->min_width = current->max_width;
}
if (current->max_width != -1 && current->min_width != -1 &&
current->max_width < current->min_width)
throw new format_error("Maximum width is less than the minimum width");
switch (*p) {
case '|':
current->kind = element_t::COLUMN;
break;
case '{':
case '(': {
char open = *p;
char close = *p == '{' ? '}' : ')';
++p;
const char * b = p;
int depth = 1;
while (*p) {
if (*p == close && --depth == 0)
break;
else if (*p == open)
++depth;
p++;
}
if (*p != close)
throw new format_error(string("Missing '") + close + "'");
if (open == '{') {
assert(! current->xpath);
current->kind = element_t::XPATH;
current->xpath = new xml::xpath_t(string(b, p));
} else {
assert(! current->format);
current->kind = element_t::GROUP;
current->format = new format_t(string(b, p));
}
break;
}
default:
assert(! current->xpath);
current->kind = element_t::XPATH;
current->xpath = new xml::xpath_t(string(p, p + 1));
break;
}
}
if (q != buf) {
current = new element_t;
elements.push_back(current);
current->kind = element_t::TEXT;
current->chars = new string(buf, q);
}
}
void format_t::compile(xml::node_t * context)
{
for (std::list<element_t *>::iterator i = elements.begin();
i != elements.end();
i++)
switch ((*i)->kind) {
case element_t::XPATH:
assert((*i)->xpath);
(*i)->xpath->compile(context);
break;
case element_t::GROUP:
assert((*i)->format);
(*i)->format->compile(context);
break;
default:
break;
}
}
int format_t::element_formatter_t::operator()
(std::ostream& out_str, element_t * elem, xml::node_t * context,
int column) const
{
if (elem->kind == element_t::COLUMN) {
if (elem->max_width != -1 && elem->max_width < column) {
out_str << '\n';
column = 0;
}
if (elem->min_width != -1 && elem->min_width > column) {
out_str << string(elem->min_width - column, ' ');
column = elem->min_width;
}
return column;
}
std::ostringstream out;
if (elem->align_left)
out << std::left;
else
out << std::right;
if (elem->min_width > 0)
out.width(elem->min_width);
int start_column = column;
if (elem->kind == element_t::XPATH)
elem->xpath->calc(context).strip_annotations()
.write(out, elem->min_width, elem->max_width);
else if (elem->kind == element_t::GROUP)
column = elem->format->format(out, context, column);
else if (elem->kind == element_t::TEXT)
out << *elem->chars;
else
assert(0);
string temp = out.str();
for (string::const_iterator i = temp.begin();
i != temp.end();
i++)
if (*i == '\n' || *i == '\r')
column = 0;
else
column++;
int virtual_width = column - start_column;
if (elem->min_width != -1 && virtual_width < elem->min_width) {
out_str << temp << string(' ', elem->min_width - virtual_width);
}
else if (elem->max_width != -1 && virtual_width > elem->max_width) {
temp.erase(temp.length() - (virtual_width - elem->max_width));
out_str << temp;
}
else {
out_str << temp;
}
return column;
}
int format_t::format(std::ostream& out, xml::node_t * context,
int column, const element_formatter_t& formatter) const
{
for (std::list<element_t *>::const_iterator i = elements.begin();
i != elements.end();
i++)
column = formatter(out, *i, context, column);
return column;
}
} // namespace ledger
#if 0
#ifdef USE_BOOST_PYTHON
using namespace boost::python;
using namespace ledger;
void export_format()
{
class_< format_t > ("Format")
.def(init<string>())
.def("parse", &format_t::parse)
.def("format", &format_t::format)
;
}
#endif // USE_BOOST_PYTHON
#endif
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