github.com/aretext/aretext@v1.3.0/state/syntax.go (about)

     1  package state
     2  
     3  import (
     4  	"github.com/aretext/aretext/syntax"
     5  	"github.com/aretext/aretext/syntax/parser"
     6  )
     7  
     8  // SetSyntax sets the syntax language for the current document.
     9  func SetSyntax(state *EditorState, language syntax.Language) {
    10  	setSyntaxAndRetokenize(state.documentBuffer, language)
    11  }
    12  
    13  // setSyntaxAndRetokenize changes the syntax language of the buffer and updates the tokens.
    14  func setSyntaxAndRetokenize(buffer *BufferState, language syntax.Language) {
    15  	buffer.syntaxLanguage = language
    16  	buffer.syntaxParser = syntax.ParserForLanguage(language)
    17  
    18  	if buffer.syntaxParser == nil {
    19  		buffer.syntaxLanguage = syntax.LanguagePlaintext
    20  		return
    21  	}
    22  
    23  	buffer.syntaxParser.ParseAll(buffer.textTree)
    24  }
    25  
    26  // retokenizeAfterEdit updates syntax tokens after an edit to the text (insert or delete).
    27  func retokenizeAfterEdit(buffer *BufferState, edit parser.Edit) {
    28  	if buffer.syntaxParser == nil {
    29  		return
    30  	}
    31  
    32  	buffer.syntaxParser.ReparseAfterEdit(buffer.textTree, edit)
    33  }