mirror of https://github.com/bsnes-emu/bsnes.git
106 lines
3.0 KiB
C++
106 lines
3.0 KiB
C++
#ifdef NALL_STRING_INTERNAL_HPP
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/* CSS Markup Language (CML) v1.0 parser
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* revision 0.02
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*/
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namespace nall { namespace {
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struct CML {
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auto& setPath(const string& pathname) { settings.path = pathname; return *this; }
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auto& setReader(const function<string (string)>& reader) { settings.reader = reader; return *this; }
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auto parse(const string& filename) -> string;
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auto parse(const string& filedata, const string& pathname) -> string;
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private:
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struct Settings {
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string path;
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function<string (string)> reader;
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} settings;
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struct State {
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string output;
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} state;
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struct Variable {
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string name;
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string value;
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};
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vector<Variable> variables;
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auto parseDocument(const string& filedata, const string& pathname, uint depth) -> bool;
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};
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auto CML::parse(const string& filename) -> string {
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if(!settings.path) settings.path = pathname(filename);
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string document = settings.reader ? settings.reader(filename) : string::read(filename);
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parseDocument(document, settings.path, 0);
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return state.output;
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}
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auto CML::parse(const string& filedata, const string& pathname) -> string {
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settings.path = pathname;
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parseDocument(filedata, settings.path, 0);
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return state.output;
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}
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auto CML::parseDocument(const string& filedata, const string& pathname, uint depth) -> bool {
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if(depth >= 100) return false; //prevent infinite recursion
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auto vendorAppend = [&](const string& name, const string& value) {
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state.output.append(" -moz-", name, ": ", value, ";\n");
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state.output.append(" -webkit-", name, ": ", value, ";\n");
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};
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for(auto& block : filedata.split("\n\n")) {
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lstring lines = block.rstrip().split("\n");
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string name = lines.takeFirst();
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if(name.beginsWith("include ")) {
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name.ltrim("include ", 1L);
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string filename{pathname, name};
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string document = settings.reader ? settings.reader(filename) : string::read(filename);
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parseDocument(document, nall::pathname(filename), depth + 1);
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continue;
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}
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if(name == "variables") {
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for(auto& line : lines) {
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auto data = line.split(":", 1L).strip();
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variables.append({data(0), data(1)});
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}
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continue;
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}
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state.output.append(name, " {\n");
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for(auto& line : lines) {
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auto data = line.split(":", 1L).strip();
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auto name = data(0), value = data(1);
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while(auto offset = value.find("var(")) {
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bool found = false;
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if(auto length = value.findFrom(*offset, ")")) {
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string name = slice(value, *offset + 4, *length - 4);
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for(auto& variable : variables) {
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if(variable.name == name) {
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value = {slice(value, 0, *offset), variable.value, slice(value, *offset + *length + 1)};
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found = true;
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break;
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}
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}
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}
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if(!found) break;
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}
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state.output.append(" ", name, ": ", value, ";\n");
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if(name == "box-sizing") vendorAppend(name, value);
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}
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state.output.append("}\n\n");
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}
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return true;
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}
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}}
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#endif
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