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song format: support for nested braces

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This commit is contained in:
Andrzej Rybczak
2009-08-14 00:30:17 +02:00
parent 42fee12eb0
commit 8ad1a04b68
3 changed files with 128 additions and 204 deletions
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211
src/song.cpp
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@@ -289,118 +289,115 @@ void MPD::Song::SetPosition(int pos)
itsSong->pos = pos;
}
std::string MPD::Song::Format_ParseBraces(std::string::const_iterator &it, std::string::const_iterator end_it) const
{
std::string result;
bool has_some_tags = 0;
MPD::Song::GetFunction get = 0;
while (*++it != '}')
{
while (*it == '{')
{
std::string tags = Format_ParseBraces(it, end_it);
if (!tags.empty())
{
has_some_tags = 1;
result += tags;
}
}
if (*it == '}')
break;
else if (it == end_it)
return "";
if (*it == '%')
{
switch (*++it)
{
case 'l':
get = &MPD::Song::GetLength;
break;
case 'F':
get = &MPD::Song::GetFile;
break;
case 'f':
get = &MPD::Song::GetName;
break;
case 'a':
get = &MPD::Song::GetArtist;
break;
case 'b':
get = &MPD::Song::GetAlbum;
break;
case 'y':
get = &MPD::Song::GetDate;
break;
case 'n':
get = &MPD::Song::GetTrack;
break;
case 'g':
get = &MPD::Song::GetGenre;
break;
case 'c':
get = &MPD::Song::GetComposer;
break;
case 'p':
get = &MPD::Song::GetPerformer;
break;
case 'd':
get = &MPD::Song::GetDisc;
break;
case 'C':
get = &MPD::Song::GetComment;
break;
case 't':
get = &MPD::Song::GetTitle;
break;
default:
break;
}
if (get)
{
std::string tag = (this->*get)();
if (!tag.empty() && (get != &MPD::Song::GetLength || GetTotalLength()))
{
has_some_tags = 1;
result += tag;
}
else
break;
}
}
else
result += *it;
}
if (*it != '}' || !has_some_tags)
{
for (; *it != '}'; ++it) { }
if (*++it == '|')
return Format_ParseBraces(++it, end_it);
else
return "";
}
else
{
if (*++it == '|')
for (; *it != '}' || *++it == '|'; ++it) { }
return result;
}
}
std::string MPD::Song::toString(const std::string &format) const
{
std::string result;
std::string::const_iterator goto_pos, prev_pos;
for (std::string::const_iterator it = format.begin(); it != format.end(); ++it)
{
CHECK_LINKED_TAGS:;
if (*it == '{')
{
prev_pos = it;
GetFunction get = 0;
for (; *it != '}'; ++it)
{
if (*it == '%')
{
switch (*++it)
{
case 'l':
get = &Song::GetLength;
break;
case 'F':
get = &Song::GetFile;
break;
case 'f':
get = &Song::GetName;
break;
case 'a':
get = &Song::GetArtist;
break;
case 'b':
get = &Song::GetAlbum;
break;
case 'y':
get = &Song::GetDate;
break;
case 'n':
get = &Song::GetTrack;
break;
case 'g':
get = &Song::GetGenre;
break;
case 'c':
get = &Song::GetComposer;
break;
case 'p':
get = &Song::GetPerformer;
break;
case 'd':
get = &Song::GetDisc;
break;
case 'C':
get = &Song::GetComment;
break;
case 't':
get = &Song::GetTitle;
break;
default:
break;
}
if (get == &Song::GetLength)
{
if (!GetTotalLength())
break;
}
else if (get)
{
if ((this->*get)().empty())
break;
}
}
}
if (*it == '}')
{
while (1)
{
if (*it == '}' && *(it+1) != '|')
break;
++it;
}
goto_pos = ++it;
it = ++prev_pos;
}
else
{
for (; *it != '}'; ++it) { }
++it;
if (it == format.end())
break;
if (*it == '{' || *it == '|')
{
if (*it == '|')
++it;
goto CHECK_LINKED_TAGS;
}
}
}
while (*it == '{')
result += Format_ParseBraces(it, format.end());
if (it == format.end())
break;
if (*it == '}')
{
if (goto_pos == format.end())
break;
it = goto_pos;
if (*it == '{')
goto CHECK_LINKED_TAGS;
}
if (*it != '%')
{
result += *it;
}
else if (*it == '%')
if (*it == '%')
{
switch (*++it)
{
@@ -447,6 +444,8 @@ std::string MPD::Song::toString(const std::string &format) const
break;
}
}
else
result += *it;
}
return result;
}