eric7/QScintilla/Lexers/LexerPython.py

branch
eric7
changeset 8312
800c432b34c8
parent 8260
2161475d9639
child 8318
962bce857696
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/eric7/QScintilla/Lexers/LexerPython.py	Sat May 15 18:45:04 2021 +0200
@@ -0,0 +1,260 @@
+# -*- coding: utf-8 -*-
+
+# Copyright (c) 2002 - 2021 Detlev Offenbach <detlev@die-offenbachs.de>
+#
+
+"""
+Module implementing a Python lexer with some additional methods.
+"""
+
+import re
+import contextlib
+
+from PyQt5.Qsci import QsciLexerPython, QsciScintilla
+
+from .SubstyledLexer import SubstyledLexer
+import Preferences
+
+
+class LexerPython(SubstyledLexer, QsciLexerPython):
+    """
+    Subclass to implement some additional lexer dependant methods.
+    """
+    def __init__(self, variant="", parent=None):
+        """
+        Constructor
+        
+        @param variant name of the language variant (string)
+        @param parent parent widget of this lexer
+        """
+        QsciLexerPython.__init__(self, parent)
+        SubstyledLexer.__init__(self)
+        
+        self.variant = variant
+        self.commentString = "#"
+        
+        self.keywordSetDescriptions = [
+            self.tr("Keywords"),
+            self.tr("Highlighted identifiers"),
+        ]
+        
+        ##############################################################
+        ## default sub-style definitions
+        ##############################################################
+        
+        # list of style numbers, that support sub-styling
+        self.baseStyles = [11]
+        
+        self.defaultSubStyles = {
+            11: {
+                0: {
+                    "Description": self.tr("Standard Library Modules"),
+                    "Words": """
+ __main__ _dummy_thread _thread abc aifc argparse array ascii ast asynchat
+ asyncio asyncore atexit audioop base64 bdb binascii binhex bisect builtins bz2
+ calendar cgi cgitb chunk cmath cmd code codecs codeop collections colorsys
+ compileall concurrent configparser contextlib contextvars copy copyreg
+ cProfile crypt csv ctypes curses dataclasses datetime dbm decimal difflib dis
+ distutils doctest email encodings ensurepip enum errno faulthandler fcntl
+ filecmp fileinput fnmatch formatter fractions ftplib functools gc getopt
+ getpass gettext glob graphlib grp gzip hashlib heapq hmac html http imaplib
+ imghdr imp importlib inspect io ipaddress itertools json keyword lib2to3
+ linecache locale logging lzma mailbox mailcap marshal math mimetypes mmap
+ modulefinder msilib msvcrt multiprocessing netrc nis nntplib numbers opcode
+ operator optparse os ossaudiodev parser path pathlib pdb pickle pickletools
+ pipes pkgutil platform plistlib poplib posix pprint profile pstats pty pwd
+ py_compile pyclbr pydoc queue quopri random re readline reprlib resource
+ rlcompleter runpy sched secrets select selectors shelve shlex shutil signal
+ site smtpd smtplib sndhdr socket socketserver spwd sqlite3 ssl stat statistics
+ string stringprep struct subprocess sunau symbol symtable sys sysconfig syslog
+ tabnanny tarfile telnetlib tempfile termios test textwrap threading time
+ timeit tkinter token tokenize trace traceback tracemalloc tty turtle
+ turtledemo types typing unicodedata unittest urllib uu uuid venv warnings wave
+ weakref webbrowser winreg winsound wsgiref xdrlib xml xmlrpc zipapp zipfile
+ zipimport zlib zoneinfo""",
+                    "Style": {
+                        "fore": 0xDD9900,
+                        "font_bold": True,
+                    }
+                },
+                1: {
+                    "Description": self.tr("__future__ Imports"),
+                    "Words": """
+ __future__ absolute_import annotations division generators generator_stop
+ nested_scopes print_function unicode_literals with_statement""",
+                    "Style": {
+                        "fore": 0xEE00AA,
+                        "font_italic": True,
+                    }
+                },
+                2: {
+                    "Description": self.tr("PyQt5/6 Modules"),
+                    "Words": """
+ PyQt5 PyQt6 Qsci Qt Qt3DAnimation Qt3DCore Qt3DExtras Qt3DInput Qt3DLogic
+ Qt3DRender QtBluetooth QtChart QtCore QtDataVisualization QtDBus QtDesigner
+ QtGui QtHelp QtLocation QtMacExtras QtMultimedia QtMultimediaWidgets QtNetwork
+ QtNetworkAuth QtNfc QtOpenGL QtOpenGLWidgets QtPositioning QtPrintSupport
+ QtPurchasing QtQml QtQuick QtQuick3D QtQuickWidgets QtRemoteObjects QtSensors
+ QtSerialPort QtSql QtSvg QtSvgWidgets QtTest QtTextToSpeech QtWebChannel
+ QtWebEngine QtWebEngineCore QtWebEngineWidgets QtWebSockets QtWidgets
+ QtWinExtras QtX11Extras QtXml QtXmlPatterns sip""",
+                    "Style": {
+                        "fore": 0x44AADD,
+                        "font_bold": True,
+                    }
+                },
+                3: {
+                    "Description": self.tr("Cython Specifics"),
+                    "Words": "cython pyximport Cython __cinit__ __dealloc__",
+                    "Style": {
+                        "fore": 0xdd0000,
+                        "font_bold": True,
+                    }
+                },
+            },
+        }
+    
+    def language(self):
+        """
+        Public method to get the lexer language.
+        
+        @return lexer language (string)
+        """
+        if not self.variant:
+            return QsciLexerPython.language(self)
+        else:
+            return self.variant
+    
+    def initProperties(self):
+        """
+        Public slot to initialize the properties.
+        """
+        self.setIndentationWarning(
+            Preferences.getEditor("PythonBadIndentation"))
+        self.setFoldComments(Preferences.getEditor("PythonFoldComment"))
+        self.setFoldQuotes(Preferences.getEditor("PythonFoldString"))
+        if not Preferences.getEditor("PythonAutoIndent"):
+            self.setAutoIndentStyle(QsciScintilla.AiMaintain)
+        with contextlib.suppress(AttributeError):
+            self.setV2UnicodeAllowed(
+                Preferences.getEditor("PythonAllowV2Unicode"))
+            self.setV3BinaryOctalAllowed(
+                Preferences.getEditor("PythonAllowV3Binary"))
+            self.setV3BytesAllowed(Preferences.getEditor("PythonAllowV3Bytes"))
+        with contextlib.suppress(AttributeError):
+            self.setFoldQuotes(Preferences.getEditor("PythonFoldQuotes"))
+            self.setStringsOverNewlineAllowed(
+                Preferences.getEditor("PythonStringsOverNewLineAllowed"))
+        with contextlib.suppress(AttributeError):
+            self.setHighlightSubidentifiers(
+                Preferences.getEditor("PythonHighlightSubidentifier"))
+    
+    def getIndentationDifference(self, line, editor):
+        """
+        Public method to determine the difference for the new indentation.
+        
+        @param line line to perform the calculation for (integer)
+        @param editor QScintilla editor
+        @return amount of difference in indentation (integer)
+        """
+        indent_width = editor.getEditorConfig('IndentWidth')
+        
+        lead_spaces = editor.indentation(line)
+        
+        pline = line - 1
+        while pline >= 0 and re.match(r'^\s*(#.*)?$', editor.text(pline)):
+            pline -= 1
+        
+        if pline < 0:
+            last = 0
+        else:
+            previous_lead_spaces = editor.indentation(pline)
+            # trailing spaces
+            m = re.search(r':\s*(#.*)?$', editor.text(pline))
+            last = previous_lead_spaces
+            if m:
+                last += indent_width
+            else:
+                # special cases, like pass (unindent) or return (also unindent)
+                m = re.search(r'(pass\s*(#.*)?$)|(^[^#]return)',
+                              editor.text(pline))
+                if m:
+                    last -= indent_width
+        
+        indentDifference = (
+            last - lead_spaces
+            if (lead_spaces % indent_width != 0 or
+                lead_spaces == 0 or
+                self.lastIndented != line) else
+            -indent_width           # __IGNORE_WARNING_W503__
+        )
+        
+        return indentDifference
+    
+    def autoCompletionWordSeparators(self):
+        """
+        Public method to return the list of separators for autocompletion.
+        
+        @return list of separators (list of strings)
+        """
+        return ['.']
+    
+    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 [QsciLexerPython.Comment,
+                         QsciLexerPython.CommentBlock]
+    
+    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 [QsciLexerPython.DoubleQuotedString,
+                         QsciLexerPython.SingleQuotedString,
+                         QsciLexerPython.TripleDoubleQuotedString,
+                         QsciLexerPython.TripleSingleQuotedString,
+                         QsciLexerPython.UnclosedString]
+    
+    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:
+            if self.language() == "Python3":
+                import keyword
+                keywords = " ".join(keyword.kwlist)
+            elif self.language() == "MicroPython":
+                keywords = ("False None True and as assert break class "
+                            "continue def del elif else except finally for "
+                            "from global if import in is lambda nonlocal not "
+                            "or pass raise return try while with yield")
+            elif self.language() == "Cython":
+                keywords = ("False None True and as assert break class "
+                            "continue def del elif else except finally for "
+                            "from global if import in is lambda nonlocal not "
+                            "or pass raise return try while with yield "
+                            "cdef cimport cpdef ctypedef")
+            else:
+                keywords = QsciLexerPython.keywords(self, kwSet)
+        else:
+            keywords = QsciLexerPython.keywords(self, kwSet)
+        
+        return keywords
+    
+    def maximumKeywordSet(self):
+        """
+        Public method to get the maximum keyword set.
+        
+        @return maximum keyword set (integer)
+        """
+        return 2

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