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#pragma once
/* CSS Markup Language (CML) v1.0 parser
* revision 0.02
*/
#include <nall/location.hpp>
namespace nall {
struct CML {
auto& setPath(const string& pathname) { settings.path = pathname; return *this; }
auto& setReader(const function<string (string)>& reader) { settings.reader = reader; return *this; }
auto parse(const string& filename) -> string;
auto parse(const string& filedata, const string& pathname) -> string;
private:
struct Settings {
string path;
function<string (string)> reader;
} settings;
struct State {
string output;
} state;
struct Variable {
string name;
string value;
};
vector<Variable> variables;
bool inMedia = false;
bool inMediaNode = false;
auto parseDocument(const string& filedata, const string& pathname, u32 depth) -> bool;
};
inline auto CML::parse(const string& filename) -> string {
if(!settings.path) settings.path = Location::path(filename);
string document = settings.reader ? settings.reader(filename) : string::read(filename);
parseDocument(document, settings.path, 0);
return state.output;
}
inline auto CML::parse(const string& filedata, const string& pathname) -> string {
settings.path = pathname;
parseDocument(filedata, settings.path, 0);
return state.output;
}
inline auto CML::parseDocument(const string& filedata, const string& pathname, u32 depth) -> bool {
if(depth >= 100) return false; //prevent infinite recursion
auto vendorAppend = [&](const string& name, const string& value) {
state.output.append(" -moz-", name, ": ", value, ";\n");
state.output.append(" -webkit-", name, ": ", value, ";\n");
};
for(auto& block : filedata.split("\n\n")) {
auto lines = block.stripRight().split("\n");
auto name = lines.takeFirst();
if(name.beginsWith("include ")) {
name.trimLeft("include ", 1L);
string filename{pathname, name};
string document = settings.reader ? settings.reader(filename) : string::read(filename);
parseDocument(document, Location::path(filename), depth + 1);
continue;
}
if(name == "variables") {
for(auto& line : lines) {
auto data = line.split(":", 1L).strip();
variables.append({data(0), data(1)});
}
continue;
}
state.output.append(name, " {\n");
inMedia = name.beginsWith("@media");
for(auto& line : lines) {
if(inMedia && !line.find(": ")) {
if(inMediaNode) state.output.append(" }\n");
state.output.append(line, " {\n");
inMediaNode = true;
continue;
}
auto data = line.split(":", 1L).strip();
auto name = data(0), value = data(1);
while(auto offset = value.find("var(")) {
bool found = false;
if(auto length = value.findFrom(*offset, ")")) {
string name = slice(value, *offset + 4, *length - 4);
for(auto& variable : variables) {
if(variable.name == name) {
value = {slice(value, 0, *offset), variable.value, slice(value, *offset + *length + 1)};
found = true;
break;
}
}
}
if(!found) break;
}
state.output.append(inMedia ? " " : " ", name, ": ", value, ";\n");
if(name == "box-sizing") vendorAppend(name, value);
}
if(inMediaNode) {
state.output.append(" }\n");
inMediaNode = false;
}
state.output.append("}\n\n");
}
return true;
}
}
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