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latex.js
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latex.js
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// -----------------------------------------------------------------------------
// Spell Right extension for Visual Studio Code (VSCode)
// Copyright (c) 2017-2018 Bartosz Antosik. Licensed under the MIT License.
// -----------------------------------------------------------------------------
'use strict';
const vscode = require('vscode');
const Parser = require('../parser');
const DocumentTypes = require('../doctype');
const ESCAPE_COMBINE = {
"\\\`": '\u0300',
'\\\'': '\u0301',
'\\\^': '\u0302',
'\\\"': '\u0308',
'\\H': '\u030B',
'\\\~': '\u0303',
'\\c': '\u0327',
'\\k': '\u0328',
'\\\=': '\u035e',
'\\b': '\u0329',
'\\\.': '\u0307',
'\\d': '\u0323',
'\\r': '\u030a',
'\\u': '\u0306',
'\\v': '\u030c'
};
const ESCAPE_COMMANDS = [
'H',
'c',
'k',
'l',
'L',
'b',
'd',
'r',
'u',
'v',
't',
'o',
'O',
'i',
'j',
'aa',
'AA'
];
class LaTeX extends Parser.default {
constructor() {
super(...arguments);
this.options = {
start: null,
end: null,
line: '%'
};
}
_filter_global(document, text, options) {
var match;
// Matching RegExps from settings. They are "spaced out" just except
// EOL chars so NOT to change the size/geometry of the document.
for (var i = 0; i < options.ignoreRegExpsMap.length; i++) {
while (match = options.ignoreRegExpsMap[i].exec(text)) {
var replace = match[0].replace(/(?:[^\r\n]|\r(?!\n))/g, ' ');
text = Parser.replaceAt(text, match.index, replace);
}
}
// Remove math
var re = /(\$|\\\(|\\\[).+?(\$|\\\)|\\\])/g;
var match;
while (match = re.exec(text)) {
var replace = ' '.repeat(match[0].length);
text = Parser.replaceAt(text, match.index, replace);
}
return text;
}
_filter_line(document, text, options) {
var match;
// Space out commands that should have parameter list spell checked.
for (var i = 0; i < options.latexSpellParameters.length; i++) {
var re = new RegExp('\\\\' + options.latexSpellParameters[i] + '[\\s]*[\\{\\[]+', 'g');
while (match = re.exec(text)) {
var replace = match[0].replace(/(?:[^\r\n]|\r(?!\n))/g, ' ');
text = Parser.replaceAt(text, match.index, replace);
}
}
// Remove commands
var re = /\\(\w+)\*?[\s]*([\s]*(\{(?:\{[^\}]*\}|[^\{\}])*\})|[\s]*(\[(?:\[[^\]]*\]|[^\[\]])*\])|[\s]*(\<(?:\<[^>]]*\>|[^\<\>])*\>))*/g;
while (match = re.exec(text)) {
if (ESCAPE_COMMANDS.indexOf(match[1]) > -1) continue;
var replace = match[0].replace(/(?:[^\r\n]|\r(?!\n))/g, ' ');
text = Parser.replaceAt(text, match.index, replace);
}
// Remove magic comments
var re = /\!(TEX|BIB).*/gi;
var match;
while (match = re.exec(text)) {
// Skip magic comment(s) serviced by the extension
var _command_tex = SPELLRIGHT_COMMAND_TEX;
var _command_tex_m = _command_tex.exec(text);
if (_command_tex_m && match.index != _command_tex_m) continue;
var replace = ' '.repeat(match[0].length);
text = Parser.replaceAt(text, match.index, replace);
}
// Remove URLs
var re = /(http|ftp|https):\/\/[\w-]+(\.[\w-]+)+([\w.,@?^=%&:\/~+#-]*[\w@?^=%&\/~+#-])?/g;
while (match = re.exec(text)) {
var replace = ' '.repeat(match[0].length);
text = Parser.replaceAt(text, match.index, replace);
}
// Remove e-mail addresses
var re = /(mailto:)*(([^<>()[\]\\.,;:\s@\"]+(\.[^<>()[\]\\.,;:\s@\"]+)*)|(\".+\"))@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\])|(([a-zA-Z\-0-9]+\.)+[a-zA-Z]{2,}))/g;
while (match = re.exec(text)) {
var replace = ' '.repeat(match[0].length);
text = Parser.replaceAt(text, match.index, replace);
}
return text;
}
_parse(document, diagnostics, options, checkAndMarkCallback, commandCallback, contextCallback, sline, scharacter, eline, echaracter) {
var text = this._filter_global(document, document.getText(), options);
var _pos = 0;
var _linecount = 0;
var _colcount = 0;
var _syntax = 0;
var InLineComment = false;
var InContent = true;
var _line_text = '';
var _line_trace = (-1);
var token = '';
var extoken = '';
var charmap = [];
var linenumber = 0;
var colnumber = 0;
var _line = null;
var _line_m = null;
var _command = SPELLRIGHT_COMMAND;
var _command_m = _command.exec(text);
var _command_tex = SPELLRIGHT_COMMAND_TEX;
_command_tex.lastIndex = 0;
var _command_tex_m = _command_tex.exec(text);
var context = 'body';
contextCallback(context);
if (typeof this.options.line !== 'undefined') {
_line = new RegExp(this.options.line, 'g');
_line_m = _line.exec(text);
}
if (typeof sline === 'undefined')
sline = 0;
if (typeof eline === 'undefined')
eline = Number.MAX_SAFE_INTEGER;
// Extract areas to spellcheck (body, comments, strings etc.)
while (_pos < text.length) {
// Line comment start
if (_line_m !== null && _pos == _line_m.index) {
if (!InLineComment) {
_colcount += _line_m[0].length;
_pos += _line_m[0].length;
InLineComment = true;
context = 'comments';
contextCallback(context);
_line.lastIndex = _pos;
}
_line_m = _line.exec(text);
continue;
}
// Detect commands & pass them up
if (InLineComment) {
if (_command_m !== null && _pos == _command_m.index) {
var _range = new vscode.Range(_linecount, _colcount, _linecount, _colcount + _command_m[0].length);
_colcount += _command_m[0].length;
_pos += _command_m[0].length;
_command.lastIndex = _pos;
commandCallback(_command_m[1], _command_m[2].trim());
_command_m = _command.exec(text);
continue;
}
if (_command_tex_m !== null && _pos == _command_tex_m.index) {
var _range = new vscode.Range(_linecount, _colcount, _linecount, _colcount + _command_tex_m[0].length);
_colcount += _command_tex_m[0].length;
_pos += _command_tex_m[0].length;
_command_tex.lastIndex = _pos;
commandCallback('language', _command_tex_m[1]);
_command_tex_m = _command_tex.exec(text);
continue;
}
}
if (InLineComment || InContent) {
if (token == '') {
linenumber = _linecount;
colnumber = _colcount;
}
if (checkAndMarkCallback && sline <= linenumber && linenumber <= eline) {
// Extract line, then filter & spell
if (_line_trace != _linecount) {
var _n_pos = text.indexOf('\n', _pos);
if (_n_pos == -1) _n_pos = text.length;
if(text[_n_pos - 1] == '\r') {
var _line_len = _colcount + _n_pos - _pos - 1;
} else {
var _line_len = _colcount + _n_pos - _pos;
}
_line_text = this._filter_line(document, text.substr(_pos - _colcount, _line_len), options);
_line_trace = _linecount;
}
// Detect & collect LaTeX escape sequences (\"{o}, \'{a}, etc.)
while (_line_text[_colcount] === '\\') {
var _escape;
// General rule for most COMBINED characters
_escape = /(\\[\`\'\^\"\~\=\.Hckbdruv])(\{)(\w)(\})/g;
_escape.lastIndex = _colcount;
var _escape_m = _escape.exec(_line_text);
if (_escape_m != null && _escape_m.index == _colcount) {
token += _escape_m[0];
extoken += _escape_m[3] + ESCAPE_COMBINE[_escape_m[1]];
extoken = extoken.normalize('NFC');
// Correct pointers with "eaten" characters
_pos += _escape_m[0].length;
_colcount += _escape_m[0].length;
charmap.push(_escape_m[0]);
continue;
}
// Handpick "BARRED L"
_escape = /(\\[lL])(\{\})/g;
_escape.lastIndex = _colcount;
var _escape_m = _escape.exec(_line_text);
if (_escape_m != null && _escape_m.index == _colcount) {
switch (_escape_m[1]) {
case '\\l':
extoken += 'ł';
break;
case '\\L':
extoken += 'Ł';
break;
}
token += _escape_m[0];
_pos += _escape_m[0].length;
_colcount += _escape_m[0].length;
charmap.push(_escape_m[0]);
continue;
}
// Handpick "SLASHED O"
_escape = /(\\[oO])(\{\})/g;
_escape.lastIndex = _colcount;
var _escape_m = _escape.exec(_line_text);
if (_escape_m != null && _escape_m.index == _colcount) {
switch(_escape_m[1]) {
case '\\o':
extoken += 'ø';
break;
case '\\O':
extoken += 'Ø';
break;
}
token += _escape_m[0];
_pos += _escape_m[0].length;
_colcount += _escape_m[0].length;
charmap.push(_escape_m[0]);
continue;
}
// Handpick "RING ABOVE A"
_escape = /(\\(aa|AA))(\{\})/g;
_escape.lastIndex = _colcount;
var _escape_m = _escape.exec(_line_text);
if (_escape_m != null && _escape_m.index == _colcount) {
switch (_escape_m[1]) {
case '\\aa':
extoken += 'å';
break;
case '\\AA':
extoken += 'Å';
break;
}
token += _escape_m[0];
_pos += _escape_m[0].length;
_colcount += _escape_m[0].length;
charmap.push(_escape_m[0]);
continue;
}
// Handpick "COMBINED i/j (dot removed)"
_escape = /(\\[\`\'\^\"v])(\{)\\([ij])(\})/g;
_escape.lastIndex = _colcount;
var _escape_m = _escape.exec(_line_text);
if (_escape_m != null && _escape_m.index == _colcount) {
switch (_escape_m[1]) {
case '\\\`':
extoken += (_escape_m[3] = 'i' ? 'ì' : ' ');
break;
case '\\\'':
extoken += (_escape_m[3] = 'i' ? 'í' : 'ȷ́');
break;
case '\\\^':
extoken += (_escape_m[3] = 'i' ? 'î' : 'ĵ');
break;
case '\\\"':
extoken += (_escape_m[3] = 'i' ? 'ï' : ' ');
break;
case '\\v':
extoken += (_escape_m[3] = 'j' ? 'ǰ' : 'J̌');
break;
}
token += _escape_m[0];
_pos += _escape_m[0].length;
_colcount += _escape_m[0].length;
charmap.push(_escape_m[0]);
continue;
}
_pos++;
_colcount++;
}
// Build lexem to check
if (_line_text[_colcount] && SPELLRIGHT_LEXEM_BUILD.test(_line_text[_colcount])) {
token += _line_text[_colcount];
extoken += _line_text[_colcount];
charmap.push(_line_text[_colcount]);
}
// Check spelling & tag diagnostics
if (token && (SPELLRIGHT_LEXEM_SPELL.test(_line_text[_colcount]) || _colcount == _line_text.length - 1)) {
var _token = { word: extoken, parser: 'latex' };
if (token != extoken) {
_token.source = token;
_token.map = charmap;
}
if (typeof echaracter !== 'undefined') {
// Here skip spelling token (word) currently being changed
if (echaracter != colnumber + (token.length - 1)) {
checkAndMarkCallback(document, context, diagnostics, _token, linenumber, colnumber);
}
} else {
checkAndMarkCallback(document, context, diagnostics, _token, linenumber, colnumber);
}
token = '';
extoken = '';
charmap = [];
}
}
}
// Line end - finish token, string & line comment etc. Should be
// fine for either LF or CRLF combination that VSCode supports.
if (text[_pos] === '\n') {
_linecount++;
_colcount = 0;
if (InLineComment) {
InLineComment = false;
context = 'body';
contextCallback(context);
}
} else {
_colcount++;
}
_pos++;
}
return { syntax: _syntax, linecount: _linecount };
}
}
Object.defineProperty(exports, '__esModule', { value: true });
exports.default = LaTeX;