1# -*- coding: utf-8 -*-
2
3# Copyright (c) 2017 - 2021 Detlev Offenbach <detlev@die-offenbachs.de>
4#
5
6"""
7Module implementing a JSON lexer with some additional methods.
8"""
9
10from PyQt5.Qsci import QsciLexerJSON
11
12from .Lexer import Lexer
13import Preferences
14
15
16class LexerJSON(Lexer, QsciLexerJSON):
17    """
18    Subclass to implement some additional lexer dependent methods.
19    """
20    def __init__(self, parent=None):
21        """
22        Constructor
23
24        @param parent parent widget of this lexer
25        """
26        QsciLexerJSON.__init__(self, parent)
27        Lexer.__init__(self)
28
29        self.commentString = "//"
30        self.streamCommentString = {
31            'start': '/* ',
32            'end': ' */'
33        }
34
35        self.keywordSetDescriptions = [
36            self.tr("JSON Keywords"),
37            self.tr("JSON-LD Keywords"),
38        ]
39
40    def initProperties(self):
41        """
42        Public slot to initialize the properties.
43        """
44        self.setHighlightComments(
45            Preferences.getEditor("JSONHightlightComments"))
46        self.setHighlightEscapeSequences(
47            Preferences.getEditor("JSONHighlightEscapeSequences"))
48        self.setFoldCompact(
49            Preferences.getEditor("AllFoldCompact"))
50
51    def isCommentStyle(self, style):
52        """
53        Public method to check, if a style is a comment style.
54
55        @param style style to check (integer)
56        @return flag indicating a comment style (boolean)
57        """
58        return style in [QsciLexerJSON.CommentLine,
59                         QsciLexerJSON.CommentBlock]
60
61    def isStringStyle(self, style):
62        """
63        Public method to check, if a style is a string style.
64
65        @param style style to check (integer)
66        @return flag indicating a string style (boolean)
67        """
68        return style in [QsciLexerJSON.String,
69                         QsciLexerJSON.UnclosedString]
70
71    def defaultKeywords(self, kwSet):
72        """
73        Public method to get the default keywords.
74
75        @param kwSet number of the keyword set (integer)
76        @return string giving the keywords (string) or None
77        """
78        return QsciLexerJSON.keywords(self, kwSet)
79
80    def maximumKeywordSet(self):
81        """
82        Public method to get the maximum keyword set.
83
84        @return maximum keyword set (integer)
85        """
86        return 2
87