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#include <formatstring.h>
#include <utils.h>
#include <logger.h>
#include <sstream>
#include <vector>
#include <cstdlib>
namespace newsbeuter {
void fmtstr_formatter::register_fmt(char f, const std::string& value) {
fmts[f] = utils::str2wstr(value);
}
std::string fmtstr_formatter::do_format(const std::string& fmt, unsigned int width) {
std::string result;
if (fmt.length() > 0) {
std::wstring wfmt(utils::str2wstr(fmt));
std::wstring w = do_wformat(wfmt, width);
result = utils::wstr2str(w);
}
return result;
}
std::wstring fmtstr_formatter::do_wformat(const std::wstring& wfmt, unsigned int width) {
std::wstring result;
unsigned int i;
unsigned int fmtlen = wfmt.length();
for (i=0;i<fmtlen;++i) {
if (wfmt[i] == L'%') {
if (i<(fmtlen-1)) {
if (wfmt[i+1] == L'-' || iswdigit(wfmt[i+1])) {
std::wstring number;
wchar_t c;
while ((wfmt[i+1] == L'-' || iswdigit(wfmt[i+1])) && i<(fmtlen-1)) {
number.append(1,wfmt[i+1]);
++i;
}
if (i<(fmtlen-1)) {
c = wfmt[i+1];
++i;
std::wistringstream is(number);
int align;
is >> align;
if (static_cast<unsigned int>(abs(align)) > fmts[c].length()) {
wchar_t buf[256];
swprintf(buf,sizeof(buf)/sizeof(*buf),L"%*ls", align, fmts[c].c_str());
result.append(buf);
} else {
result.append(fmts[c].substr(0,abs(align)));
}
}
} else if (wfmt[i+1] == L'%') {
result.append(1, L'%');
++i;
} else if (wfmt[i+1] == L'>') {
if (wfmt[i+2]) {
if (width == 0) {
result.append(1, wfmt[i+2]);
i += 2;
} else {
std::wstring rightside = do_wformat(&wfmt[i+3], 0);
int diff = width - wcswidth(result.c_str(),result.length()) - wcswidth(rightside.c_str(), rightside.length());
if (diff > 0) {
result.append(diff, wfmt[i+2]);
}
result.append(rightside);
i = fmtlen;
}
}
} else if (wfmt[i+1] == L'?') {
unsigned int j = i+2;
while (wfmt[j] && wfmt[j] != L'?')
j++;
if (wfmt[j]) {
std::wstring cond = wfmt.substr(i+2, j - i - 2);
unsigned int k = j + 1;
while (wfmt[k] && wfmt[k] != L'?')
k++;
if (wfmt[k]) {
std::wstring values = wfmt.substr(j+1, k - j - 1);
std::vector<std::wstring> pair = utils::wtokenize(values,L"&");
while (pair.size() < 2)
pair.push_back(L"");
std::wstring subresult;
if (fmts[cond[0]].length() > 0) {
if (pair[0].length() > 0)
subresult = do_wformat(pair[0], width);
} else {
if (pair[1].length() > 0)
subresult = do_wformat(pair[1], width);
}
result.append(subresult);
i = k;
} else {
i = k - 1;
}
} else {
i = j - 1;
}
} else {
result.append(fmts[wfmt[i+1]]);
++i;
}
}
} else {
result.append(1, wfmt[i]);
}
}
return result;
}
}
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