mirror of
https://github.com/Jermolene/TiddlyWiki5
synced 2024-11-15 22:34:51 +00:00
359 lines
12 KiB
JavaScript
359 lines
12 KiB
JavaScript
/* start bibtexParse 0.0.24 */
|
||
|
||
//Original work by Henrik Muehe (c) 2010
|
||
//
|
||
//CommonJS port by Mikola Lysenko 2013
|
||
//
|
||
//Choice of compact (default) or pretty output from toBibtex:
|
||
// Nick Bailey, 2017.
|
||
//
|
||
//Port to Browser lib by ORCID / RCPETERS
|
||
//
|
||
//Issues:
|
||
//no comment handling within strings
|
||
//no string concatenation
|
||
//no variable values yet
|
||
//Grammar implemented here:
|
||
//bibtex -> (string | preamble | comment | entry)*;
|
||
//string -> '@STRING' '{' key_equals_value '}';
|
||
//preamble -> '@PREAMBLE' '{' value '}';
|
||
//comment -> '@COMMENT' '{' value '}';
|
||
//entry -> '@' key '{' key ',' key_value_list '}';
|
||
//key_value_list -> key_equals_value (',' key_equals_value)*;
|
||
//key_equals_value -> key '=' value;
|
||
//value -> value_quotes | value_braces | key;
|
||
//value_quotes -> '"' .*? '"'; // not quite
|
||
//value_braces -> '{' .*? '"'; // not quite
|
||
(function(exports) {
|
||
|
||
function BibtexParser() {
|
||
|
||
this.months = ["jan", "feb", "mar", "apr", "may", "jun", "jul", "aug", "sep", "oct", "nov", "dec"];
|
||
this.notKey = [',','{','}',' ','='];
|
||
this.pos = 0;
|
||
this.input = "";
|
||
this.entries = new Array();
|
||
|
||
this.currentEntry = "";
|
||
|
||
this.setInput = function(t) {
|
||
this.input = t;
|
||
};
|
||
|
||
this.getEntries = function() {
|
||
return this.entries;
|
||
};
|
||
|
||
this.isWhitespace = function(s) {
|
||
return (s == ' ' || s == '\r' || s == '\t' || s == '\n');
|
||
};
|
||
|
||
this.match = function(s, canCommentOut) {
|
||
if (canCommentOut == undefined || canCommentOut == null)
|
||
canCommentOut = true;
|
||
this.skipWhitespace(canCommentOut);
|
||
if (this.input.substring(this.pos, this.pos + s.length) == s) {
|
||
this.pos += s.length;
|
||
} else {
|
||
throw TypeError("Token mismatch: match", "expected " + s + ", found "
|
||
+ this.input.substring(this.pos));
|
||
};
|
||
this.skipWhitespace(canCommentOut);
|
||
};
|
||
|
||
this.tryMatch = function(s, canCommentOut) {
|
||
if (canCommentOut == undefined || canCommentOut == null)
|
||
canCommentOut = true;
|
||
this.skipWhitespace(canCommentOut);
|
||
if (this.input.substring(this.pos, this.pos + s.length) == s) {
|
||
return true;
|
||
} else {
|
||
return false;
|
||
};
|
||
this.skipWhitespace(canCommentOut);
|
||
};
|
||
|
||
/* when search for a match all text can be ignored, not just white space */
|
||
this.matchAt = function() {
|
||
while (this.input.length > this.pos && this.input[this.pos] != '@') {
|
||
this.pos++;
|
||
};
|
||
|
||
if (this.input[this.pos] == '@') {
|
||
return true;
|
||
};
|
||
return false;
|
||
};
|
||
|
||
this.skipWhitespace = function(canCommentOut) {
|
||
while (this.isWhitespace(this.input[this.pos])) {
|
||
this.pos++;
|
||
};
|
||
if (this.input[this.pos] == "%" && canCommentOut == true) {
|
||
while (this.input[this.pos] != "\n") {
|
||
this.pos++;
|
||
};
|
||
this.skipWhitespace(canCommentOut);
|
||
};
|
||
};
|
||
|
||
this.value_braces = function() {
|
||
var bracecount = 0;
|
||
this.match("{", false);
|
||
var start = this.pos;
|
||
var escaped = false;
|
||
while (true) {
|
||
if (!escaped) {
|
||
if (this.input[this.pos] == '}') {
|
||
if (bracecount > 0) {
|
||
bracecount--;
|
||
} else {
|
||
var end = this.pos;
|
||
this.match("}", false);
|
||
return this.input.substring(start, end);
|
||
};
|
||
} else if (this.input[this.pos] == '{') {
|
||
bracecount++;
|
||
} else if (this.pos >= this.input.length - 1) {
|
||
throw TypeError("Unterminated value: value_braces");
|
||
};
|
||
};
|
||
if (this.input[this.pos] == '\\' && escaped == false)
|
||
escaped = true;
|
||
else
|
||
escaped = false;
|
||
this.pos++;
|
||
};
|
||
};
|
||
|
||
this.value_comment = function() {
|
||
var str = '';
|
||
var brcktCnt = 0;
|
||
while (!(this.tryMatch("}", false) && brcktCnt == 0)) {
|
||
str = str + this.input[this.pos];
|
||
if (this.input[this.pos] == '{')
|
||
brcktCnt++;
|
||
if (this.input[this.pos] == '}')
|
||
brcktCnt--;
|
||
if (this.pos >= this.input.length - 1) {
|
||
throw TypeError("Unterminated value: value_comment", + this.input.substring(start));
|
||
};
|
||
this.pos++;
|
||
};
|
||
return str;
|
||
};
|
||
|
||
this.value_quotes = function() {
|
||
this.match('"', false);
|
||
var start = this.pos;
|
||
var escaped = false;
|
||
while (true) {
|
||
if (!escaped) {
|
||
if (this.input[this.pos] == '"') {
|
||
var end = this.pos;
|
||
this.match('"', false);
|
||
return this.input.substring(start, end);
|
||
} else if (this.pos >= this.input.length - 1) {
|
||
throw TypeError("Unterminated value: value_quotes", this.input.substring(start));
|
||
};
|
||
}
|
||
if (this.input[this.pos] == '\\' && escaped == false)
|
||
escaped = true;
|
||
else
|
||
escaped = false;
|
||
this.pos++;
|
||
};
|
||
};
|
||
|
||
this.single_value = function() {
|
||
var start = this.pos;
|
||
if (this.tryMatch("{")) {
|
||
return this.value_braces();
|
||
} else if (this.tryMatch('"')) {
|
||
return this.value_quotes();
|
||
} else {
|
||
var k = this.key();
|
||
if (k.match("^[0-9]+$"))
|
||
return k;
|
||
else if (this.months.indexOf(k.toLowerCase()) >= 0)
|
||
return k.toLowerCase();
|
||
else
|
||
throw "Value expected: single_value" + this.input.substring(start) + ' for key: ' + k;
|
||
|
||
};
|
||
};
|
||
|
||
this.value = function() {
|
||
var values = [];
|
||
values.push(this.single_value());
|
||
while (this.tryMatch("#")) {
|
||
this.match("#");
|
||
values.push(this.single_value());
|
||
};
|
||
return values.join("");
|
||
};
|
||
|
||
this.key = function(optional) {
|
||
var start = this.pos;
|
||
while (true) {
|
||
if (this.pos >= this.input.length) {
|
||
throw TypeError("Runaway key: key");
|
||
};
|
||
// а-яА-Я is Cyrillic
|
||
//console.log(this.input[this.pos]);
|
||
if (this.notKey.indexOf(this.input[this.pos]) >= 0) {
|
||
if (optional && this.input[this.pos] != ',') {
|
||
this.pos = start;
|
||
return null;
|
||
};
|
||
return this.input.substring(start, this.pos);
|
||
} else {
|
||
this.pos++;
|
||
|
||
};
|
||
};
|
||
};
|
||
|
||
this.key_equals_value = function() {
|
||
var key = this.key();
|
||
if (this.tryMatch("=")) {
|
||
this.match("=");
|
||
var val = this.value();
|
||
key = key.trim()
|
||
return [ key, val ];
|
||
} else {
|
||
throw TypeError("Value expected, equals sign missing: key_equals_value",
|
||
this.input.substring(this.pos));
|
||
};
|
||
};
|
||
|
||
this.key_value_list = function() {
|
||
var kv = this.key_equals_value();
|
||
this.currentEntry['entryTags'] = {};
|
||
this.currentEntry['entryTags'][kv[0]] = kv[1];
|
||
while (this.tryMatch(",")) {
|
||
this.match(",");
|
||
// fixes problems with commas at the end of a list
|
||
if (this.tryMatch("}")) {
|
||
break;
|
||
}
|
||
;
|
||
kv = this.key_equals_value();
|
||
this.currentEntry['entryTags'][kv[0]] = kv[1];
|
||
};
|
||
};
|
||
|
||
this.entry_body = function(d) {
|
||
this.currentEntry = {};
|
||
this.currentEntry['citationKey'] = this.key(true);
|
||
this.currentEntry['entryType'] = d.substring(1);
|
||
if (this.currentEntry['citationKey'] != null) {
|
||
this.match(",");
|
||
}
|
||
this.key_value_list();
|
||
this.entries.push(this.currentEntry);
|
||
};
|
||
|
||
this.directive = function() {
|
||
this.match("@");
|
||
return "@" + this.key();
|
||
};
|
||
|
||
this.preamble = function() {
|
||
this.currentEntry = {};
|
||
this.currentEntry['entryType'] = 'PREAMBLE';
|
||
this.currentEntry['entry'] = this.value_comment();
|
||
this.entries.push(this.currentEntry);
|
||
};
|
||
|
||
this.comment = function() {
|
||
this.currentEntry = {};
|
||
this.currentEntry['entryType'] = 'COMMENT';
|
||
this.currentEntry['entry'] = this.value_comment();
|
||
this.entries.push(this.currentEntry);
|
||
};
|
||
|
||
this.entry = function(d) {
|
||
this.entry_body(d);
|
||
};
|
||
|
||
this.alernativeCitationKey = function () {
|
||
this.entries.forEach(function (entry) {
|
||
if (!entry.citationKey && entry.entryTags) {
|
||
entry.citationKey = '';
|
||
if (entry.entryTags.author) {
|
||
entry.citationKey += entry.entryTags.author.split(',')[0] += ', ';
|
||
}
|
||
entry.citationKey += entry.entryTags.year;
|
||
}
|
||
});
|
||
}
|
||
|
||
this.bibtex = function() {
|
||
while (this.matchAt()) {
|
||
var d = this.directive();
|
||
this.match("{");
|
||
if (d.toUpperCase() == "@STRING") {
|
||
this.string();
|
||
} else if (d.toUpperCase() == "@PREAMBLE") {
|
||
this.preamble();
|
||
} else if (d.toUpperCase() == "@COMMENT") {
|
||
this.comment();
|
||
} else {
|
||
this.entry(d);
|
||
}
|
||
this.match("}");
|
||
};
|
||
|
||
this.alernativeCitationKey();
|
||
};
|
||
};
|
||
|
||
exports.toJSON = function(bibtex) {
|
||
var b = new BibtexParser();
|
||
b.setInput(bibtex);
|
||
b.bibtex();
|
||
return b.entries;
|
||
};
|
||
|
||
/* added during hackathon don't hate on me */
|
||
/* Increased the amount of white-space to make entries
|
||
* more attractive to humans. Pass compact as false
|
||
* to enable */
|
||
exports.toBibtex = function(json, compact) {
|
||
if (compact === undefined) compact = true;
|
||
var out = '';
|
||
|
||
var entrysep = ',';
|
||
var indent = '';
|
||
if (!compact) {
|
||
entrysep = ',\n';
|
||
indent = ' ';
|
||
}
|
||
for ( var i in json) {
|
||
out += "@" + json[i].entryType;
|
||
out += '{';
|
||
if (json[i].citationKey)
|
||
out += json[i].citationKey + entrysep;
|
||
if (json[i].entry)
|
||
out += json[i].entry ;
|
||
if (json[i].entryTags) {
|
||
var tags = indent;
|
||
for (var jdx in json[i].entryTags) {
|
||
if (tags.trim().length != 0)
|
||
tags += entrysep + indent;
|
||
tags += jdx + (compact ? '={' : ' = {') +
|
||
json[i].entryTags[jdx] + '}';
|
||
}
|
||
out += tags;
|
||
}
|
||
out += compact ? '}\n' : '\n}\n\n';
|
||
}
|
||
return out;
|
||
|
||
};
|
||
|
||
})(typeof exports === 'undefined' ? this['bibtexParse'] = {} : exports);
|
||
|
||
/* end bibtexParse */
|