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# -*- coding: utf-8 -*-

# Copyright (c) 2011 - 2023 Detlev Offenbach <detlev@die-offenbachs.de>
#

"""
Module implementing a Octave lexer with some additional methods.
"""

from PyQt6.Qsci import QsciLexerOctave

from .Lexer import Lexer


class LexerOctave(Lexer, QsciLexerOctave):
    """
    Subclass to implement some additional lexer dependent methods.
    """

    def __init__(self, parent=None):
        """
        Constructor

        @param parent parent widget of this lexer
        """
        QsciLexerOctave.__init__(self, parent)
        Lexer.__init__(self)

        self.commentString = "#"

        self.keywordSetDescriptions = [
            self.tr("Keywords"),
        ]

    def isCommentStyle(self, style):
        """
        Public method to check, if a style is a comment style.

        @param style style to check (integer)
        @return flag indicating a comment style (boolean)
        """
        return style in [QsciLexerOctave.Comment]

    def isStringStyle(self, style):
        """
        Public method to check, if a style is a string style.

        @param style style to check (integer)
        @return flag indicating a string style (boolean)
        """
        return style in [
            QsciLexerOctave.DoubleQuotedString,
            QsciLexerOctave.SingleQuotedString,
        ]

    def defaultKeywords(self, kwSet):
        """
        Public method to get the default keywords.

        @param kwSet number of the keyword set (integer)
        @return string giving the keywords (string) or None
        """
        return QsciLexerOctave.keywords(self, kwSet)


def createLexer(variant="", parent=None):
    """
    Function to instantiate a lexer object.

    @param variant name of the language variant
    @type str
    @param parent parent widget of this lexer
    @type QObject
    @return instantiated lexer object
    @rtype LexerOctave
    """
    return LexerOctave(parent=parent)