mirror of
https://github.com/LCPQ/QUESTDB_website.git
synced 2024-11-04 05:03:53 +01:00
386 lines
11 KiB
JavaScript
386 lines
11 KiB
JavaScript
// source: https://github.com/kercl/LaTeX-to-Unicode/tree/master
|
||
|
||
texparser = {
|
||
replace_chars: function(x, table) {
|
||
var res = "";
|
||
for(i in x)
|
||
if(x[i] in table)
|
||
res = res + table[x[i]];
|
||
else
|
||
res = res + x[i];
|
||
return res;
|
||
},
|
||
|
||
trim_tokens: function(tokens) {
|
||
var beg = 0, end = tokens.length - 1;
|
||
for(; beg < tokens.length; beg++)
|
||
if(!this.whitespace(tokens[beg].object))
|
||
break;
|
||
for(; end >= 0; end--)
|
||
if(!this.whitespace(tokens[end].object))
|
||
break;
|
||
return tokens.slice(beg, end);
|
||
},
|
||
|
||
strings_disjoint: function(x, y) {
|
||
if(x.length != y.length)
|
||
return false;
|
||
|
||
for(var i = 0; i < x.length; i++)
|
||
if(x[i] == y[i])
|
||
return false;
|
||
return true;
|
||
},
|
||
|
||
optimize: function(tokens) {
|
||
var single = "";
|
||
var sliceat = -1;
|
||
|
||
for(var i = 0; i < tokens.length; i++) {
|
||
if((tokens[i].object.length == 1 &&
|
||
"_^{}$".indexOf(tokens[i].object) == -1) || this.whitespace(tokens[i].object))
|
||
single = single + tokens[i].object;
|
||
else {
|
||
sliceat = i;
|
||
break;
|
||
}
|
||
}
|
||
if(sliceat == -1)
|
||
return [{object:single}];
|
||
return [{object:single}].concat(tokens.slice(sliceat));
|
||
},
|
||
|
||
tokenize: function(str) {
|
||
var ret = [];
|
||
|
||
str = str.replace(/\u200B/g, "\\");
|
||
|
||
while(str != "") {
|
||
var s = "";
|
||
if("_^{}$".indexOf(str[0]) > -1) {
|
||
s = str[0];
|
||
}else if(str[0] == '\\') {
|
||
s = str.match(/^\\([a-zA-Z]+|\$|\\|\{|\}| |\_|\^)/g);
|
||
if(s != null)
|
||
s = s[0];
|
||
else
|
||
s = str[0];
|
||
}else {
|
||
var s1 = str.match(/^[^_\\\$\^\{\}\s]/g),
|
||
s2 = str.match(/^[^_\\\$\^\{\}\S]+/g);
|
||
|
||
if(s1 == null) {
|
||
s = s2[0];
|
||
}else if(s2 == null) { // not whitespace
|
||
s = s1[0];
|
||
}else {
|
||
s = s[0];
|
||
}
|
||
}
|
||
|
||
ret.push({object:s});
|
||
str = str.substring(Math.max(1,s.length));
|
||
}
|
||
var ret2 = this.optimize(ret);
|
||
return ret2;
|
||
},
|
||
|
||
whitespace: function(str) {
|
||
return str.match(/^\s+/g) != null;
|
||
},
|
||
|
||
tag: function(tok) {
|
||
return (tok.object[0] == "\\" && tok.object.length > 1) || tok.object == "^" || tok.object == "_";
|
||
},
|
||
|
||
extract_block: function(tokens, begin, start_token, end_token) {
|
||
start_token = typeof start_token !== 'undefined' ? start_token : "{";
|
||
end_token = typeof end_token !== 'undefined' ? end_token : "}";
|
||
|
||
if(tokens[begin] == undefined)
|
||
return [];
|
||
|
||
if((this.tag(tokens[begin]) || tokens[begin].object == "\\") && tokens[begin].caret != undefined)
|
||
return [];
|
||
|
||
if(tokens[begin].object != start_token)
|
||
return [tokens[begin]];
|
||
if(tokens[begin].closed != true)
|
||
return [];
|
||
|
||
var bc = 1;
|
||
var res = [tokens[begin]];
|
||
|
||
for(var i = begin+1; i < tokens.length; i++) {
|
||
if(tokens[i].object == start_token)
|
||
bc++;
|
||
else if(tokens[i].object == end_token) {
|
||
bc--;
|
||
if(bc == 0) {
|
||
res.push(tokens[i]);
|
||
return res;
|
||
}
|
||
}
|
||
res.push(tokens[i]);
|
||
}
|
||
|
||
return [];
|
||
},
|
||
|
||
finish: function(str) {
|
||
return str;
|
||
},
|
||
|
||
reformat_math: function(str) {
|
||
var res = tag_table["\\textit"].value(str.replace(/\\ /g, "\u00A0"));
|
||
res = res.replace(/ /g, "");
|
||
return res.replace(/[><=≌≊≆≈⋍∽≅⋞⋟⪖⪕⩵≡≧⩾≥⟵≫⪊≩⪈≳⪆⋛⪌≷⇔↔≦⩽⪅⋚⪋≲≤⪉≨⪇≴←⟵⇐↔⇔→⟶⇒↦≹∈∋∌∉≸≮≯≠≾≼≼⪹⪵⇒≿⫅⊆⫋⊊⊂≽≽⪺⪶⋩≻⫆⊇⫌⊋⊃⋑⋐]|:./g, function(x) {
|
||
if(x.match(/:./g))
|
||
return ": " + x[1];
|
||
return "\u2009" + x + "\u2009";
|
||
}).trim();
|
||
},
|
||
|
||
parse_str: function(str, cursorpos) {
|
||
var bracketstack = [], beginstack = [];
|
||
var tokens = this.tokenize(str);
|
||
|
||
var carettrace = 0;
|
||
var mathmodebegin = -1;
|
||
|
||
for(var i = 0; i < tokens.length; i++) {
|
||
if(tokens[i].object == "{") {
|
||
bracketstack.push(i);
|
||
}else if(tokens[i].object == "}" && bracketstack.length > 0) {
|
||
tokens[bracketstack[bracketstack.length-1]].closed = true;
|
||
tokens[i].closed = true;
|
||
bracketstack.pop();
|
||
}
|
||
|
||
if(tokens[i].object == "\\begin") {
|
||
beginstack.push(i);
|
||
}else if(tokens[i].object == "\\end" && beginstack.length > 0) {
|
||
tokens[beginstack[beginstack.length-1]].closed = true;
|
||
tokens[i].closed = true;
|
||
beginstack.pop();
|
||
}
|
||
|
||
if(tokens[i].object == "$") {
|
||
if(mathmodebegin != -1) {
|
||
tokens[mathmodebegin].closed = true;
|
||
tokens[i].closed = true;
|
||
}else {
|
||
mathmodebegin = i;
|
||
}
|
||
}
|
||
|
||
if(cursorpos > carettrace && cursorpos <= carettrace + tokens[i].object.length)
|
||
tokens[i].caret = cursorpos - carettrace;
|
||
carettrace = carettrace + tokens[i].object.length;
|
||
}
|
||
|
||
for(var i = 0; i < bracketstack.length; i++)
|
||
tokens[bracketstack[i]].closed = false;
|
||
for(var i = 0; i < beginstack.length; i++)
|
||
tokens[beginstack[i]].closed = false;
|
||
|
||
var res = this.parse(tokens);
|
||
return res;
|
||
},
|
||
|
||
"itemize": function(tokens) {
|
||
console.log("itemize");
|
||
|
||
var tmp_tokens = [];
|
||
for(var i = 0; i < tokens.length - 1; i++) {
|
||
if(tokens[i].object == "\\item" && this.whitespace(tokens[i + 1].object)) {
|
||
tmp_tokens.push(tokens[i]);
|
||
i = i + 1;
|
||
}else if(tokens[i + 1].object == "\\item" && this.whitespace(tokens[i].object)) {
|
||
}else if(tokens[i].object.indexOf("\n") > -1) {
|
||
tmp_tokens.push({object:"\n"});
|
||
}else {
|
||
tmp_tokens.push(tokens[i]);
|
||
}
|
||
}
|
||
console.log(tmp_tokens);
|
||
tag_table["\\item"] = {type:"symbol",value:"\n • "};
|
||
var res = this.parse(tmp_tokens);
|
||
tag_table["\\item"] = undefined;
|
||
|
||
res.text = res.text.replace(/\n( • )?/g, function(x) { if(x.length == 1) return "\n "; else return x; }) + "\n\n";
|
||
|
||
return res;
|
||
},
|
||
|
||
"theorem": function(tokens) {
|
||
var res = this.parse(this.trim_tokens(tokens));
|
||
res.text = tag_table["\\textbf"].value("Theorem: ") + res.text + "\n";
|
||
return res;
|
||
},
|
||
|
||
"proof": function(tokens) {
|
||
var res = this.parse(this.trim_tokens(tokens));
|
||
res.text = tag_table["\\textbf"].value("Proof: ") + res.text + "\n\u200F□\u200F\n";
|
||
return res;
|
||
},
|
||
|
||
"align*": function(tokens) {
|
||
var res = this.parse( [{object:"$",closed:true}].concat(this.trim_tokens(tokens)).concat([{object:"$",closed:true}]) );
|
||
res.text = "\n " + res.text.replace(/\n/g, "\n ") + "\n\n";
|
||
return res;
|
||
},
|
||
|
||
parse_depth:0,
|
||
parse: function(tokens) {
|
||
this.parse_depth++;
|
||
|
||
var res = "", mathmode = null;
|
||
var cursorpos = -1;
|
||
|
||
var decorator_stack = [];
|
||
|
||
for(var i = 0; i < tokens.length; i++) {
|
||
if(tokens[i].caret != undefined && tokens[i].closed == undefined) {
|
||
if(tokens[i].object != "\\\\"
|
||
&& tokens[i].object != "\\_"
|
||
&& tokens[i].object != "\\}"
|
||
&& tokens[i].object != "\\{"
|
||
&& tokens[i].object != "\\$"
|
||
&& tokens[i].object != "\\^"
|
||
&& tokens[i].object != "\\$") {
|
||
cursorpos = res.length + tokens[i].caret;
|
||
res = res + tokens[i].object;
|
||
continue;
|
||
}
|
||
}
|
||
|
||
if(tokens[i].object == "{" || tokens[i].object == "}") {
|
||
if(tokens[i].closed != true)
|
||
res = res + tokens[i].object;
|
||
if(tokens[i].caret != undefined && tokens[i].object == "}") {
|
||
cursorpos = cursorpos + res.length + 1;
|
||
}
|
||
}else if(tokens[i].object == "$" && tokens[i].closed == true) {
|
||
if(mathmode == null) {
|
||
mathmode = res;
|
||
res = "";
|
||
}else {
|
||
res = mathmode + this.reformat_math(res);
|
||
mathmode = null;
|
||
}
|
||
}else {
|
||
if(this.tag(tokens[i])) {
|
||
if(tag_table[tokens[i].object] != undefined) {
|
||
if(tag_table[tokens[i].object].type == "symbol") {
|
||
var val = tag_table[tokens[i].object].value;
|
||
res = res + val;
|
||
if(tokens[i].caret != undefined && cursorpos == -1)
|
||
cursorpos = res.length + val.length - 1;
|
||
}else if(tag_table[tokens[i].object].type == "decorator" && i < tokens.length - 1) {
|
||
var subblock = this.extract_block(tokens, i+1);
|
||
if(subblock.length > 0) {
|
||
sret = this.parse(subblock);
|
||
var subs = tag_table[tokens[i].object].value(sret.text);
|
||
res = res + subs;
|
||
if(sret.caret != -1 && cursorpos == -1) {
|
||
cursorpos = res.length;
|
||
}
|
||
i = i + subblock.length;
|
||
}else {
|
||
res = res + tokens[i].object;
|
||
}
|
||
}else if(tag_table[tokens[i].object].type == "decorator2" && i < tokens.length - 1) {
|
||
var subblock = this.extract_block(tokens, i+1);
|
||
var init_i = i;
|
||
if(subblock.length > 0) {
|
||
i = i + subblock.length;
|
||
var subblock2 = this.extract_block(tokens, i+1);
|
||
if(subblock2.length > 0) {
|
||
var sret1 = this.parse(subblock);
|
||
var sret2 = this.parse(subblock2);
|
||
if(cursorpos == -1)
|
||
cursorpos = sret1.caret + res.length;
|
||
if(cursorpos == -1)
|
||
cursorpos = sret2.caret + res.length;
|
||
var subs = tag_table[tokens[init_i].object].value(sret1.text, sret2.text);
|
||
res = res + subs;
|
||
|
||
i = i + subblock2.length;
|
||
|
||
if((sret1.caret != -1 || sret2.caret != -1) && cursorpos == -1) {
|
||
cursorpos = res.length + subs.length + 2;
|
||
}else if(tokens[i].caret != undefined) {
|
||
cursorpos = res.length + subs.length + 1;
|
||
|
||
}
|
||
}else {
|
||
res = res + tokens[init_i].object;
|
||
i = init_i;
|
||
if(tokens[i + 1].object == "{") {
|
||
tokens[i + 1].closed = undefined;
|
||
console.log(tokens[i + subblock.length]);
|
||
tokens[i + subblock.length].closed = undefined;
|
||
}
|
||
console.log("frac not finished:");
|
||
console.log(tokens);
|
||
}
|
||
}else {
|
||
res = res + tokens[i].object;
|
||
}
|
||
}else
|
||
res = res + tokens[i].object;
|
||
}else if(tokens[i].object == "\\begin" && i+1 < tokens.length) {
|
||
if(tokens[i+1].object == "{") {
|
||
var subblock = this.extract_block(tokens, i, "\\begin", "\\end");
|
||
var argument = this.extract_block(tokens, i+1);
|
||
if(argument.length > 0) {
|
||
tokens[i+1].closed = false;
|
||
tokens[i+argument.length].closed = false;
|
||
|
||
if(subblock.length > 0) {
|
||
var argument_parsed = this.parse(argument.slice(1,argument.length-1));
|
||
if(argument_parsed.text != this.parse(this.extract_block(tokens, i + subblock.length)).text) {
|
||
res = res + tokens[i].object;
|
||
continue;
|
||
}
|
||
if(argument_parsed.text in this) {
|
||
i = i + subblock.length + argument.length;
|
||
var parsed_block = this[argument_parsed.text](subblock.slice(argument.length + 1, subblock.length));
|
||
res = res + parsed_block.text;
|
||
|
||
}else {
|
||
res = res + tokens[i].object;
|
||
}
|
||
}else
|
||
res = res + tokens[i].object;
|
||
}else {
|
||
res = res + tokens[i].object;
|
||
}
|
||
}else
|
||
res = res + tokens[i].object;
|
||
}else if(tokens[i].object == "\\end" && i+1 < tokens.length) {
|
||
if(tokens[i+1].object == "{") {
|
||
var argument = this.extract_block(tokens, i+1);
|
||
if(argument.length > 0) {
|
||
tokens[i+1].closed = false;
|
||
tokens[i+argument.length].closed = false;
|
||
res = res + tokens[i].object;
|
||
}else {
|
||
res = res + tokens[i].object;
|
||
}
|
||
}else
|
||
res = res + tokens[i].object;
|
||
}else {
|
||
res = res + tokens[i].object;
|
||
}
|
||
}else {
|
||
res = res + tokens[i].object;
|
||
}
|
||
}
|
||
}
|
||
this.parse_depth--;
|
||
return {text:res, caret:cursorpos};
|
||
}
|
||
}
|