Enhance UDL lexer



  • @Alan-Kilborn

    Manager summary :-)

    I failed at the documentation by stating that comment style is using id 2 and
    comment line style is using 1 whereas it is exactly the opposite.



  • @Alan-Kilborn

    (AFAIK, the accepted language of this forum in English.)

    maybe one accepted language as we see more often :-)



  • But thanks, @Alan-Kilborn,

    Chrome used to be my backup browser, but I’ve recently switched to it being my primary, and I didn’t know there was an easy RClick>Translate option in Chrome. When I ran it on the German on this page, it translated okay for me. (Which is good, because my 2 years of highschool German from more than a quarter-century ago just didn’t cut it.)

    But I do agree that the forum’s default language is English, and if people want help here, they should at least provide the translation for us. I understand that some of the posters might be more comfortable (or equally comfortable) in German; and it’s fine for someone fluent in German to answer in German; but also provide a translation to English, so the other people who read this thread – both for those who have started to help, and got lost when it switched language; and for those who come here searching for a solution to a similar problem, and find that the actual answer is buried in another language, when it started in English.



  • In the source code I find the place where the numbers are assigned or do not arise.
    I would like to find that to be able to understand it.
    Then the template would have to be adjusted.



  • Ok, :-D

    the outcome of the discussion is that I need to post another version of the script
    which hopefully adresses @guy038 findings as well,

    So dear future reader,
    if you have read until here - forget about everything you read and hope that you will find
    a new version of the script as another post after this one.
    :-D



  • @Ekopalypse

    omg … you are german speaking … that’s the last thing i would have expected … your name sounded so apocalyptically greek 😉



  • @Gerald-Kirchner

    starting from line 266.



  • @Meta-Chuh

    well my name is eren and a nickname is eko.
    And you are absolutely right about apocalypse.
    In my first week at work, everyone learned that I could be called eko.
    At one time I did something terribly wrong which lead to an failure of the
    whole production system. My colleague said something like
    “this must be the feeling when the 4 apocalyptic riders arrive” and another one
    managed to make eko and apocalyptic to result in ekopalypse.
    So here comes the ekopalypse :-D



  • thanks for the insight, @Ekopalypse
    the combination of all, name, mishap at work, and this community, gives way to a perfect book title:

    … the holy apocalypse and his fantastic 4 riders … 😂😂👍



  • LOL :-D



  • In order to be able to solve the issue about scrolling the second editor
    instance and having styling in it, it is needed to have a way to identify which
    scintilla instance sent which scintilla notification.
    This can be achieved by using the SCI_SETIDENTIFIER as described here.

    I’ve opened two issues one here and one there to address this.
    Hopefully this will be implemented soon.

    The issue about zooming and word wrap, actually it is a word wrap only issue,
    should be solved with this version, also the documentation fix is implemented ;-)

    # -*- coding: utf-8 -*-
    
    from Npp import editor, editor1, editor2, notepad, NOTIFICATION, SCINTILLANOTIFICATION, INDICATORSTYLE
    import ctypes
    import ctypes.wintypes as wintypes
    
    from collections import OrderedDict
    regexes = OrderedDict()
    
    # ------------------------------------------------- configuration area ---------------------------------------------------
    #
    # Define the lexer name exactly as it can be found in the Language menu
    lexer_name = 'BR! Source'
    
    # Definition of colors and regular expressions
    #   Note, the order in which regular expressions will be processed
    #   is determined by its creation, that is, the first definition is processed first, then the 2nd, and so on
    #
    #   The basic structure always looks like this
    #
    #   regexes[(a, b)] = (c, d)
    #
    #   regexes = an ordered dictionary which ensures that the regular expressions are always processed in the same order
    #   a = a unique number - suggestion, start with 0 and always increase by one
    #   b = color in the form of (r,g,b) such as (255,0,0) for the color red
    #   c = raw byte string, describes the regular expression. Example r'\w+'
    #   d = number of the match group to be used
    
    
    # Examples:
    #   All found words which may consist of letter, numbers and the underscore,
    #   with the exception of those that begin with fn, are displayed in a blue-like color.
    #   The results from match group 1 should be used for this.
    regexes[(0, (79, 175, 239))] = (r'fn\w+\$|(\w+\$)', 1)
    
    #   All numbers are to be displayed in an orange-like color, the results from
    #   matchgroup 0, the standard matchgroup, should be used for this.
    regexes[(1, (252, 173, 67))] = (r'\d', 0)
    
    # Definition of which area should not be styled
    # 1 = comment style
    # 2 = comment line style
    # 16 = delimiter1
    # ...
    # 23 = delimiter8
    excluded_styles = [1, 2, 16, 17, 18, 19, 20, 21, 22, 23]
    
    # ------------------------------------------------ /configuration area ---------------------------------------------------
    
    try:
        EnhanceUDLLexer().main()
    except NameError:
    
        user32 = wintypes.WinDLL('user32')
    
        WM_USER = 1024
        NPPMSG = WM_USER+1000
        NPPM_GETLANGUAGEDESC = NPPMSG+84
        SC_INDICVALUEBIT = 0x1000000
        SC_INDICFLAG_VALUEFORE = 1
    
    
        class SingletonEnhanceUDLLexer(type):
            '''
                Ensures, more or less, that only one
                instance of the main class can be instantiated
            '''
            _instance = None
            def __call__(cls, *args, **kwargs):
                if cls._instance is None:
                    cls._instance = super(SingletonEnhanceUDLLexer, cls).__call__(*args, **kwargs)
                return cls._instance
    
    
        class EnhanceUDLLexer(object):
            '''
                Provides additional color options and should be used in conjunction with the built-in UDL function.
                An indicator is used to avoid style collisions.
                Although the Scintilla documentation states that indicators 0-7 are reserved for the lexers,
                indicator 0 is used because UDL uses none internally.
    
                Even when using more than one regex, it is not necessary to define more than one indicator
                because the class uses the flag SC_INDICFLAG_VALUEFORE.
                See https://www.scintilla.org/ScintillaDoc.html#Indicators for more information on that topic
            '''
            __metaclass__ = SingletonEnhanceUDLLexer
    
            def __init__(self):
                '''
                    Instantiated the class,
                    because of __metaclass__ = ... usage, is called once only.
                '''
                editor.callbackSync(self.on_updateui, [SCINTILLANOTIFICATION.UPDATEUI])
                notepad.callback(self.on_langchanged, [NOTIFICATION.LANGCHANGED])
                notepad.callback(self.on_bufferactivated, [NOTIFICATION.BUFFERACTIVATED])
                self.doc_is_of_interest = False
                self.lexer_name = None
                self.npp_hwnd = user32.FindWindowW(u'Notepad++', None)
                self.configure()
    
    
            @staticmethod
            def rgb(r, g, b):
                '''
                    Helper function
                    Retrieves rgb color triple and converts it
                    into its integer representation
    
                    Args:
                        r = integer, red color value in range of 0-255
                        g = integer, green color value in range of 0-255
                        b = integer, blue color value in range of 0-255
                    Returns:
                        integer
                '''
                return (b << 16) + (g << 8) + r
    
    
            @staticmethod
            def paint_it(color, pos, length):
                '''
                    This is where the actual coloring takes place.
                    Color, the position of the first character and
                    the length of the text to be colored must be provided.
                    Coloring occurs only if the position is not within the excluded range.
    
                    Args:
                        color = integer, expected in range of 0-16777215
                        pos = integer,  denotes the start position
                        length = integer, denotes how many chars need to be colored.
                    Returns:
                        None
                '''
                if pos < 0 or editor.getStyleAt(pos) in excluded_styles:
                    return
                editor.setIndicatorCurrent(0)
                editor.setIndicatorValue(color)
                editor.indicatorFillRange(pos, length)
    
    
            def style(self):
                '''
                    Calculates the text area to be searched for in the current document.
                    Calls up the regexes to find the position and
                    calculates the length of the text to be colored.
                    Deletes the old indicators before setting new ones.
    
                    Args:
                        None
                    Returns:
                        None
                '''
                start_line = editor.docLineFromVisible(editor.getFirstVisibleLine())
                end_line = editor.docLineFromVisible(start_line + editor.linesOnScreen())
                start_position = editor.positionFromLine(start_line)
                end_position = editor.getLineEndPosition(end_line)
                editor.setIndicatorCurrent(0)
                editor.indicatorClearRange(0, editor.getTextLength())
                for color, regex in self.regexes.items():
                    editor.research(regex[0],
                                    lambda m: self.paint_it(color[1],
                                                            m.span(regex[1])[0],
                                                            m.span(regex[1])[1] - m.span(regex[1])[0]),
                                    0,
                                    start_position,
                                    end_position)
    
    
            def configure(self):
                '''
                    Define basic indicator settings, the needed regexes as well as the lexer name.
    
                    Args:
                        None
                    Returns:
                        None
                '''
                editor1.indicSetStyle(0, INDICATORSTYLE.TEXTFORE)
                editor1.indicSetFlags(0, SC_INDICFLAG_VALUEFORE)
                editor2.indicSetStyle(0, INDICATORSTYLE.TEXTFORE)
                editor2.indicSetFlags(0, SC_INDICFLAG_VALUEFORE)
                self.regexes = OrderedDict([ ((k[0], self.rgb(*k[1]) | SC_INDICVALUEBIT), v) for k, v in regexes.items() ])
                self.lexer_name = u'User Defined language file - %s' % lexer_name
    
    
            def check_lexer(self):
                '''
                    Checks if the current document is of interest
                    and sets the flag accordingly
    
                    Args:
                        None
                    Returns:
                        None
                '''
                language = notepad.getLangType()
                length = user32.SendMessageW(self.npp_hwnd, NPPM_GETLANGUAGEDESC, language, None)
                buffer = ctypes.create_unicode_buffer(u' ' * length)
                user32.SendMessageW(self.npp_hwnd, NPPM_GETLANGUAGEDESC, language, ctypes.byref(buffer))
                self.doc_is_of_interest = True if buffer.value == self.lexer_name else False
    
    
            def on_bufferactivated(self, args):
                '''
                    Callback which gets called every time one switches a document.
                    Triggers the check if the document is of interest.
    
                    Args:
                        provided by notepad object but none are of interest
                    Returns:
                        None
                '''
                self.check_lexer()
    
    
            def on_updateui(self, args):
                '''
                    Callback which gets called every time scintilla
                    (aka the editor) changed something within the document.
    
                    Triggers the styling function if the document is of interest.
    
                    Args:
                        provided by scintilla but none are of interest
                    Returns:
                        None
                '''
                if self.doc_is_of_interest:
                    self.style()
    
    
            def on_langchanged(self, args):
                '''
                    Callback gets called every time one uses the Language menu to set a lexer
                    Triggers the check if the document is of interest
    
                    Args:
                        provided by notepad object but none are of interest
                    Returns:
                        None
                '''
                self.check_lexer()
    
    
            def main(self):
                '''
                    Main function entry point.
                    Simulates two events to enforce detection of current document
                    and potential styling.
    
                    Args:
                        None
                    Returns:
                        None
                '''
                self.on_bufferactivated(None)
                self.on_updateui(None)
    
        EnhanceUDLLexer().main()
    
    


  • @Ekopalypse said:

    I’ve opened two issues one here and one there to address this.

    I don’t mean to be a debbie downer but good luck with the “there” one. The “here” one is much more likely to happen, although it seems that even PS development has slowed way down after being encouragingly active for a while.



  • @Ekopalypse

    Hopefully this will be implemented soon.

    my experience says this is rather “en attendant godot” or “warten auf godot” ;-)


Log in to reply