We ignore tabs unless a tab width has been set.

* Check that the character at the given position is a word or punctuation character and that * the next character is of a different character class.

* Check that the character at the given position is a word or punctuation character and that * the previous character is of a different character cla

Retrieve the length of the buffer.

Returns true if support for Less CSS is enabled. \sa setLessLanguage()

只识别中文和英文两种单词的状态

* Lexes the Scintilla document. * @param startPos The position in the document to start lexing at. * @param lengthDoc The number of bytes in the d

There are cases not handled correctly, like $abcd\textrm{what is $x+y$}z+w$. But I think it's already good enough.

Deleted so LexState objects can not be copied.

Constructs a new instance of the lexer. */

Constructor. */