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import Version from './version.js';
var Symbols = {"symbols":{}, "templates":{}};
Symbols.make_template_symbol = function(template_name, name, args){
var template = JSON.parse(JSON.stringify(Symbols.templates[template_name]));
return Symbols.eval_template(template, name, args);
}
Symbols.eval_template = function(template, name, args){
args['name'] = name;
if(Object.prototype.toString.call(template) == "[object String]") {
var ans = template;
for(var nam in args) {
ans = ans.replace(new RegExp("\\{\\$"+nam+"\\}"),args[nam]);
}
return ans;
}
else {
for(var x in template) {
template[x] = Symbols.eval_template(template[x], name, args)
}
return template;
}
}
Symbols.lookup_type = function(type){
for(var s in Symbols.symbols){
if(Symbols.symbols[s].attrs.type == type) return s;
}
}
Symbols.add_symbols = function(syms){
var version = syms["_version"];
var collection_name = syms["_name"];
delete syms["_version"];
delete syms["_name"];
Iif(!version || version != Version.SYMBOL_VERSION) Version.SYMBOL_ERROR(collection_name, version);
var templates = syms["_templates"];
Eif(templates){
for(var t in templates){
Symbols.templates[t] = templates[t];
}
delete syms["_templates"];
}
for(var s in syms){
if(syms[s].template){
for(var v in syms[s].values){
var name = null;
var args = null;
if(Object.prototype.toString.call(syms[s].values) == "[object Array]"){
name = syms[s].values[v];
args = {}
}
else{
name = v;
args = syms[s].values[v];
}
Symbols.symbols[name] = Symbols.make_template_symbol(syms[s].template, name, args);
}
}
else{
Symbols.symbols[s] = syms[s];
}
}
}
Symbols.validate = function(){
for(var sym in Symbols.symbols){
if(!Symbols.symbols[sym].output.latex) throw "Symbol " + sym + " missing output.latex (needed for display)";
if(!Symbols.symbols[sym].attrs.name) throw "Symbol " + sym + " missing attrs.name (needed for text output)";
if(!Symbols.symbols[sym].attrs.group) throw "Symbol " + sym + " missing attrs.group (needed for mobile)";
//for(var i = 0; i < sym.length; i++)
// if(sym.substring(0,i) in Symbols.symbols) throw "WARNING: Symbols are not prefix free: '" + sym.substring(0,i) + "' and '" + sym + "' are both symbols";
}
}
// Returns an array with alternating text and argument elements of the form
// {"type":"text", "val":the_text} or {"type":"arg", "index":the_index, "seperators":[sep1,sep2,...], "template":[...]}
Symbols.split_output = function(output){
var regex = /\{\$([0-9]+)/g, result, starts = [], indices = [], i;
var ans = [];
while ((result = regex.exec(output))){
starts.push(result.index);
indices.push(parseInt(result[1]));
}
ans.push({"type":"text","val":output.substring(0,starts.length > 0 ? starts[0] : output.length)}); // Push the first text bit
for(i = 0; i < starts.length; i++){
var idx = starts[i]+1;
// Find template (if defined)
// var tmpl_str = "";
// var tmpl = [];
// if(output[idx] == "["){
// idx++;
// var tmpl_opens = 1;
// while(opens > 0 && idx < output.length){
// if(output[idx] == "]"){ tmpl_opens--; }
// if(output[idx] == "["){ tmpl_opens++; }
// if(tmpl_opens > 1){ tmpl_str += output[idx]; }
// idx++;
// }
// tmpl = Symbols.split_output(tmpl_str);
// }
var separators = [];
var sep = "";
var opens = 1
while(opens > 0 && idx < output.length){
if(output[idx] == "}"){
if(opens == 2){ separators.push(sep); sep = ""; }
opens--; }
if(opens >= 2){ sep += output[idx]; }
if(output[idx] == "{"){ opens++; }
idx++;
}
ans.push({"type":"arg","index":indices[i],"separators":separators});
var next = (i == starts.length - 1) ? output.length : starts[i+1];
ans.push({"type":"text","val":output.substring(idx,next)}); // Push the next text bit
}
return ans;
}
Symbols.add_blanks = function(output, blank){
var out = Symbols.split_output(output);
var ans = "";
for(var i = 0; i < out.length; i++){
if(out[i]["type"] == "text"){
ans += out[i]['val'];
}
else ans += blank;
}
return ans;
}
Symbols.symbol_to_node = function(s, content, base){
// s is a symbol
//
// content is a list of nodes to insert
var f = base.createElement("f");
for(var attr in s.attrs){
f.setAttribute(attr, s.attrs[attr]);
}
if("ast" in s){
if("type" in s.ast) f.setAttribute("ast_type",s.ast["type"])
if("value" in s.ast) f.setAttribute("ast_value",s.ast["value"])
}
//if(s['char']) f.setAttribute("c","yes");
var first_ref=-1, arglist = [];
var first, i;
// Make the b nodes for rendering each output
for(var t in s["output"]){
var b = base.createElement("b");
b.setAttribute("p",t);
var out = Symbols.split_output(s["output"][t]);
for(i = 0; i < out.length; i++){
if(out[i]["type"] == "text"){
if(out[i]["val"].length > 0) b.appendChild(base.createTextNode(out[i]['val']));
}
else{
if(t == 'latex') arglist.push(out[i]);
var nt = base.createElement("r");
nt.setAttribute("ref",out[i]["index"]);
if(out[i]["separators"].length > 0) nt.setAttribute("d",out[i]["separators"].length);
for(var j = 0; j < out[i]["separators"].length; j++) nt.setAttribute("sep"+j,out[i]["separators"][j]);
if(t == 'latex' && first_ref == -1) first_ref = out[i]["index"];
b.appendChild(nt);
}
}
f.appendChild(b);
}
// Now make the c/l nodes for storing the content
for(i = 0; i < arglist.length; i++){
var a = arglist[i];
var nc;
if(i in content && a['separators'].length > 0) { // If the content for this node is provided and is an array, then dig down to find the first c child
f.appendChild(content[i][0]);
nc = content[i][0];
while(nc.nodeName != "c")
nc = nc.firstChild;
}
else if(i in content) { // If the content for this node is provided and not an array, create the c node and populate its content
var node_list = content[i];
nc = base.createElement("c");
for(var se = 0; se < node_list.length; se++)
nc.appendChild(node_list[se].cloneNode(true));
f.appendChild(nc)
}
else{ // Otherwise create the c node and possibly l nodes
nc = base.createElement("c");
var new_e = base.createElement("e");
new_e.appendChild(base.createTextNode(""));
nc.appendChild(new_e);
var par = f; // Now we add nested l elements if this is an array of dimension > 0
for(j = 0; j < a['separators'].length; j++){
var nl = base.createElement("l");
nl.setAttribute("s","1");
par.appendChild(nl);
par = nl;
}
par.appendChild(nc);
}
if(i+1 == first_ref) first = nc.lastChild; // Note the first node we should visit based on the LaTeX output
if(s['args'] && s['args'][i]){ // Set the arguments for the c node based on the symbol
for(var arg in s['args'][i]){
nc.setAttribute(arg,s['args'][i][arg]);
}
}
}
return {"f":f, "first":first, "args":arglist};
}
// class Template{
// constructor(name, definition){
// this.name = name;
// this.protosym = new Symbol(`__${name}`, definition);
// }
// evaluate(args){
// let sym = {...this.protosym};
// let r = function(src){
// for(var n in args) {
// return src.replace(new RegExp("\\{\\$"+n+"\\}"),args[n]);
// }
// };
// Object.keys(sym.outputs).forEach({(x) => sym.outputs[x] = r(sym.outputs[x])});
// Object.keys(sym.attrs).forEach({(x) => sym.attrs[x] = r(sym.attrs[x])});
// sym.args.forEach({(x) => Object.keys(sym.args[x]).forEach({(y) => sym.args[x][y] = r(sym.args[x][y])});
// }
// }
// class Symbol{
// constructor(name, definition){
// this.name = name;
// this.outputs = config.outputs;
// this.args = config.args;
// this.attrs = config.attrs;
// this.input = config.input;
// this.keys = config.keys;
// this.ast_value = config.ast.value;
// this.ast_type = config.ast.type;
// }
// }
Symbols.add_symbols(DEFAULT_SYMBOLS);
export default Symbols;
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