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

# Copyright (c) 2005 - 2020 Detlev Offenbach <detlev@die-offenbachs.de>
#

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


from PyQt5.Qsci import QsciLexerCSS

from .Lexer import Lexer
import Preferences


class LexerCSS(Lexer, QsciLexerCSS):
    """
    Subclass to implement some additional lexer dependant methods.
    """
    def __init__(self, parent=None):
        """
        Constructor
        
        @param parent parent widget of this lexer
        """
        QsciLexerCSS.__init__(self, parent)
        Lexer.__init__(self)
        
        self.commentString = "#"
        self.streamCommentString = {
            'start': '/* ',
            'end': ' */'
        }
        
        self.keywordSetDescriptions = [
            self.tr("CSS1 Properties"),
            self.tr("Pseudo-Classes"),
            self.tr("CSS2 Properties"),
            self.tr("CSS3 Properties"),
            self.tr("Pseudo-Elements"),
            self.tr("Browser-Specific CSS Properties"),
            self.tr("Browser-Specific Pseudo-Classes"),
            self.tr("Browser-Specific Pseudo-Elements"),
        ]
    
    def initProperties(self):
        """
        Public slot to initialize the properties.
        """
        self.setFoldComments(Preferences.getEditor("CssFoldComment"))
        self.setFoldCompact(Preferences.getEditor("AllFoldCompact"))
        try:
            self.setHSSLanguage(
                Preferences.getEditor("CssHssSupport"))
            self.setLessLanguage(
                Preferences.getEditor("CssLessSupport"))
            self.setSCSSLanguage(
                Preferences.getEditor("CssSassySupport"))
        except AttributeError:
            pass
    
    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 [QsciLexerCSS.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 [QsciLexerCSS.DoubleQuotedString,
                         QsciLexerCSS.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
        """
        if kwSet == 1:
            return (
                "color background-color background-image background-repeat"
                " background-attachment background-position background"
                " font-family font-style font-variant font-weight font-size"
                " font word-spacing letter-spacing text-decoration"
                " vertical-align text-transform text-align text-indent"
                " line-height margin-top margin-right margin-bottom"
                " margin-left margin padding-top padding-right padding-bottom"
                " padding-left padding border-top-width border-right-width"
                " border-bottom-width border-left-width border-width"
                " border-top border-right border-bottom border-left border"
                " border-color border-style width height float clear display"
                " white-space list-style-type list-style-image"
                " list-style-position list-style"
            )
        
        if kwSet == 2:
            return (
                "link active visited first-child focus hover lang left"
                " right first empty enabled disabled checked not root target"
                " only-child last-child nth-child nth-last-child first-of-type"
                " last-of-type nth-of-type nth-last-of-type only-of-type valid"
                " invalid required optional first-letter first-line before"
                " after"
            )
        
        if kwSet == 3:
            return (
                "border-top-color border-right-color border-bottom-color"
                " border-left-color border-color border-top-style"
                " border-right-style border-bottom-style border-left-style"
                " border-style top right bottom left position z-index"
                " direction unicode-bidi min-width max-width min-height"
                " max-height overflow clip visibility content quotes"
                " counter-reset counter-increment marker-offset size marks"
                " page-break-before page-break-after page-break-inside page"
                " orphans widows font-stretch font-size-adjust unicode-range"
                " units-per-em src panose-1 stemv stemh slope cap-height"
                " x-height ascent descent widths bbox definition-src baseline"
                " centerline mathline topline text-shadow caption-side"
                " table-layout border-collapse border-spacing empty-cells"
                " speak-header cursor outline outline-width outline-style"
                " outline-color volume speak pause-before pause-after pause"
                " cue-before cue-after cue play-during azimuth elevation"
                " speech-rate voice-family pitch pitch-range stress richness"
                " speak-punctuation speak-numeral"
            )
        
        if kwSet == 4:
            return (
                "background-size border-radius border-top-right-radius"
                " border-bottom-right-radius border-bottom-left-radius"
                " border-top-left-radius box-shadow columns column-width"
                " column-count column-rule column-gap column-rule-color"
                " column-rule-style column-rule-width resize opacity word-wrap"
            )
        
        if kwSet == 5:
            return (
                "first-letter first-line before after selection"
            )
        
        if kwSet == 6:
            return (
                "^-moz- ^-webkit- ^-o- ^-ms- filter"
            )
        
        if kwSet == 7:
            return (
                "indeterminate default ^-moz- ^-webkit- ^-o- ^-ms-"
            )
        
        if kwSet == 8:
            return (
                "selection ^-moz- ^-webkit- ^-o- ^-ms-"
            )
        
        return QsciLexerCSS.keywords(self, kwSet)
