Veronica K. B. Olsen
366 lines
13 KiB
Python
366 lines
13 KiB
Python
# -*- coding: utf-8 -*-
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"""novelWriter Text Tokenizer
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novelWriter – Text Tokenizer
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==============================
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Splits a piece of nW markdown text into its elements
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File History:
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Created: 2019-05-05 [0.0.1]
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This file is a part of novelWriter
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Copyright 2020, Veronica Berglyd Olsen
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>.
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"""
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import logging
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import re
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import nw
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from operator import itemgetter
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from PyQt5.QtCore import QRegularExpression
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from nw.core.document import NWDoc
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from nw.core.tools import numberToWord
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from nw.constants import nwItemLayout
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logger = logging.getLogger(__name__)
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class Tokenizer():
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FMT_B_B = 1 # Begin bold
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FMT_B_E = 2 # End bold
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FMT_I_B = 3 # Begin italics
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FMT_I_E = 4 # End italics
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FMT_U_B = 5 # Begin underline
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FMT_U_E = 6 # End underline
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T_EMPTY = 1 # Empty line (new paragraph)
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T_COMMENT = 2 # Comment line
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T_KEYWORD = 3 # Command line
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T_HEAD1 = 4 # Header 1 (title)
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T_HEAD2 = 5 # Header 2 (chapter)
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T_HEAD3 = 6 # Header 3 (scene)
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T_HEAD4 = 7 # Header 4
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T_TEXT = 8 # Text line
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T_SEP = 9 # Scene separator
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T_SKIP = 10 # Paragraph break
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T_PBREAK = 11 # Page break
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A_LEFT = 1 # Left aligned
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A_RIGHT = 2 # Right aligned
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A_CENTRE = 3 # Centred
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A_JUSTIFY = 4 # Justified
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def __init__(self, theProject, theParent):
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self.mainConf = nw.CONFIG
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self.theProject = theProject
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self.theParent = theParent
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# Data Variables
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self.theText = None # The raw text to be tokenized
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self.theHandle = None # The handle associated with the text
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self.theItem = None # The NWItem associated with the handle
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self.theTokens = None # The list of the processed tokens
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self.theResult = None # The result text after conversion
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# User Settings
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self.doComments = False # Also process comments
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self.doKeywords = False # Also process keywords like tags and references
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self.fmtTitle = "%title%" # Formatting for titles
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self.fmtChapter = "%title%" # Formatting for numbered chapters
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self.fmtUnNum = "%title%" # Formatting for unnumbered chapters
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self.fmtScene = "%title%" # Formatting for scenes
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self.fmtSection = "%title%" # Formatting for sections
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self.hideScene = False # Do not include scene headers
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self.hideSection = False # Do not include section headers
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# Instance Variables
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self.numChapter = 0 # Counter for chapter numbers
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self.firstScene = False # Flag to indicate that the first scene of the chapter
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return
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def clearData(self):
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"""Clear the data arrays and variables, but not settings, so the class
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can be reused for multiple documents.
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"""
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self.theText = None
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self.theHandle = None
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self.theItem = None
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self.theTokens = None
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self.theResult = None
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self.numChapter = 0
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self.firstScene = False
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return
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##
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# Setters
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##
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def setComments(self, doComments):
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self.doComments = doComments
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return
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def setKeywords(self, doKeywords):
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self.doKeywords = doKeywords
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return
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def setTitleFormat(self, fmtTitle):
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self.fmtTitle = fmtTitle
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return
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def setChapterFormat(self, fmtChapter):
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self.fmtChapter = fmtChapter
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return
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def setUnNumberedFormat(self, fmtUnNum):
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self.fmtUnNum = fmtUnNum
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return
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def setSceneFormat(self, fmtScene, hideScene):
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self.fmtScene = fmtScene
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self.hideScene = hideScene
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return
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def setSectionFormat(self, fmtSection, hideSection):
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self.fmtSection = fmtSection
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self.hideSection = hideSection
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return
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##
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# Class Methods
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##
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def setText(self, theHandle, theText=None):
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"""Set the text for the tokenizer from a handle. If theText is
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not set, load it from the file.
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"""
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self.theHandle = theHandle
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self.theItem = self.theProject.projTree[theHandle]
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if theText is not None:
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# If the text is set, just use that
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self.theText = theText
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else:
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# Otherwise, load it from file
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theDocument = NWDoc(self.theProject, self.theParent)
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self.theText = theDocument.openDocument(theHandle)
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return
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def doAutoReplace(self):
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"""Run through the user's auto-replace dictionary.
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"""
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if len(self.theProject.autoReplace) > 0:
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repDict = {}
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for aKey, aVal in self.theProject.autoReplace.items():
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repDict["<%s>" % aKey] = aVal
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xRep = re.compile("|".join([re.escape(k) for k in repDict.keys()]), flags=re.DOTALL)
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self.theText = xRep.sub(lambda x: repDict[x.group(0)], self.theText)
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return
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def doPostProcessing(self):
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return
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def tokenizeText(self):
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"""Scan the text for either lines starting with specific
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characters that indicate headers, comments, commands etc, or
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just contains plain text. in the case of plain text, apply the
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same RegExes that the syntax highlighter uses and save the
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locations of these formatting tags into the token array.
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"""
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# RegExes for adding formatting tags within text lines
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# Keep in sync with the DocHighlighter class
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rxFormats = [(
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QRegularExpression(r"(?<![\w|\\])([\*]{2})(?!\s)(?m:(.+?))(?<![\s|\\])(\1)(?!\w)"),
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[None, self.FMT_B_B, None, self.FMT_B_E]
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),(
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QRegularExpression(r"(?<![\w|_|\\])([_])(?!\s|\1)(?m:(.+?))(?<![\s|\\])(\1)(?!\w)"),
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[None, self.FMT_I_B, None, self.FMT_I_E]
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),(
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QRegularExpression(r"(?<![\w|\\])([_]{2})(?!\s)(?m:(.+?))(?<![\s|\\])(\1)(?!\w)"),
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[None, self.FMT_U_B, None, self.FMT_U_E]
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)]
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self.theTokens = []
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for aLine in self.theText.splitlines():
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# Tag lines starting with specific characters
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if len(aLine.strip()) == 0:
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self.theTokens.append((self.T_EMPTY,"",None,self.A_LEFT))
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elif aLine[0] == "%":
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self.theTokens.append((self.T_COMMENT,aLine[1:].strip(),None,self.A_LEFT))
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elif aLine[0] == "@":
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self.theTokens.append((self.T_KEYWORD,aLine[1:].strip(),None,self.A_LEFT))
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elif aLine[:2] == "# ":
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self.theTokens.append((self.T_HEAD1,aLine[2:].strip(),None,self.A_LEFT))
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elif aLine[:3] == "## ":
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self.theTokens.append((self.T_HEAD2,aLine[3:].strip(),None,self.A_LEFT))
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elif aLine[:4] == "### ":
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self.theTokens.append((self.T_HEAD3,aLine[4:].strip(),None,self.A_LEFT))
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elif aLine[:5] == "#### ":
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self.theTokens.append((self.T_HEAD4,aLine[5:].strip(),None,self.A_LEFT))
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else:
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# Otherwise we use RegEx to find formatting tags within a line of text
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fmtPos = []
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for theRX, theKeys in rxFormats:
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rxThis = theRX.globalMatch(aLine, 0)
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while rxThis.hasNext():
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rxMatch = rxThis.next()
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for n in range(1,len(theKeys)):
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if theKeys[n] is not None:
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xPos = rxMatch.capturedStart(n)
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xLen = rxMatch.capturedLength(n)
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fmtPos.append([xPos,xLen,theKeys[n]])
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# Save the line as is, but append the array of formatting locations
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# sorted by position
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fmtPos = sorted(fmtPos,key=itemgetter(0))
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self.theTokens.append((self.T_TEXT,aLine,fmtPos,self.A_LEFT))
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# Always add an empty line at the end
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self.theTokens.append((self.T_EMPTY,"",None,self.A_LEFT))
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return
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def doHeaders(self):
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"""Apply formatting to the text headers according to document
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layout and user settings.
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"""
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isNone = self.theItem.itemLayout == nwItemLayout.NO_LAYOUT
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isTitle = self.theItem.itemLayout == nwItemLayout.TITLE
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isBook = self.theItem.itemLayout == nwItemLayout.BOOK
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isPage = self.theItem.itemLayout == nwItemLayout.PAGE
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isPart = self.theItem.itemLayout == nwItemLayout.PARTITION
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isUnNum = self.theItem.itemLayout == nwItemLayout.UNNUMBERED
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isChap = self.theItem.itemLayout == nwItemLayout.CHAPTER
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isScene = self.theItem.itemLayout == nwItemLayout.SCENE
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isNote = self.theItem.itemLayout == nwItemLayout.NOTE
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# No special header formatting for notes and no-layout files
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if isNone or isNote:
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return
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# For novel files, we need to handle chapter numbering and scene
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# breaks
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if isBook or isUnNum or isChap or isScene:
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for n in range(len(self.theTokens)):
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tToken = self.theTokens[n]
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tType = tToken[0]
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tText = tToken[1]
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if tType == self.T_TEXT:
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self.firstScene = False
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elif tType == self.T_HEAD2:
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if not isUnNum:
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self.numChapter += 1
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tText = self._formatChapter(tText,isUnNum)
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self.theTokens[n] = (tType,tText,None,self.A_LEFT)
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self.firstScene = True
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elif tType == self.T_HEAD3:
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tTemp = self._formatScene(tText)
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if tTemp == "" and self.hideScene:
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self.theTokens[n] = (self.T_EMPTY,"",None,self.A_LEFT)
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elif tTemp == "" and not self.hideScene:
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if self.firstScene:
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self.theTokens[n] = (self.T_EMPTY,"",None,self.A_LEFT)
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else:
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self.theTokens[n] = (self.T_SKIP,"",None,self.A_LEFT)
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elif tTemp == self.fmtScene:
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if self.firstScene:
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self.theTokens[n] = (self.T_EMPTY,"",None,self.A_LEFT)
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else:
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self.theTokens[n] = (self.T_SEP,tTemp,None,self.A_CENTRE)
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else:
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self.theTokens[n] = (tType,tTemp,None,self.A_LEFT)
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self.firstScene = False
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elif tType == self.T_HEAD4:
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tTemp = self._formatSection(tText)
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if tTemp == "" and self.hideSection:
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self.theTokens[n] = (self.T_EMPTY,"",None,self.A_LEFT)
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elif tTemp == "" and not self.hideSection:
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self.theTokens[n] = (self.T_SKIP,"",None,self.A_LEFT)
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elif tTemp == self.fmtSection:
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self.theTokens[n] = (self.T_SEP,tTemp,None,self.A_CENTRE)
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else:
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self.theTokens[n] = (tType,tTemp,None,self.A_LEFT)
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# For title page and partitions, we need to centre all text
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# and for some formats, we need a page break
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if isTitle or isPart:
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for n in range(len(self.theTokens)):
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tToken = self.theTokens[n]
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tType = tToken[0]
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tText = tToken[1]
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tFormat = tToken[2]
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self.theTokens[n] = (tType,tText,tFormat,self.A_CENTRE)
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self.theTokens.append((self.T_PBREAK,"",None,self.A_LEFT))
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return
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##
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# Internal Functions
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##
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def _formatTitle(self, theText):
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"""Replace tokens for headers level 1.
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"""
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theTitle = self.fmtTitle
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theTitle = theTitle.replace("%title%", theText)
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return theTitle
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def _formatChapter(self, theText, noNum):
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"""Replace tokens for headers level 2.
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"""
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if noNum:
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theTitle = self.fmtUnNum
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theTitle = theTitle.replace("%title%", theText)
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else:
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theTitle = self.fmtChapter
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theTitle = theTitle.replace("%title%", theText)
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theTitle = theTitle.replace("%num%", str(self.numChapter))
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theTitle = theTitle.replace("%numword%", numberToWord(self.numChapter,"en"))
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return theTitle
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def _formatScene(self, theText):
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"""Replace tokens for headers level 3.
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"""
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theTitle = self.fmtScene
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theTitle = theTitle.replace("%title%", theText)
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return theTitle
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def _formatSection(self, theText):
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"""Replace tokens for headers level 4.
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"""
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theTitle = self.fmtSection
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theTitle = theTitle.replace("%title%", theText)
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return theTitle
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# END Class Tokenizer
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