Add text paragraph formatting
This commit is contained in:
Veronica Berglyd Olsen
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"""
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novelWriter – Markdown Text Converter
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=====================================
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File History:
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Created: 2021-02-06 [1.2b1] ToMarkdown
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This file is a part of novelWriter
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Copyright 2018–2024, 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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from __future__ import annotations
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import logging
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from PyQt5.QtGui import (
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QColor, QFont, QFontMetrics, QTextBlockFormat, QTextCharFormat,
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QTextCursor, QTextDocument
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)
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from novelwriter import SHARED
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from novelwriter.constants import nwHeaders
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from novelwriter.core.project import NWProject
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from novelwriter.core.tokenizer import T_Formats, Tokenizer
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from novelwriter.types import (
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QtAlignCenter, QtAlignJustify, QtAlignLeft, QtAlignRight, QtPageBreakAfter,
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QtPageBreakBefore, QtTransparent, QtVAlignNormal, QtVAlignSub,
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QtVAlignSuper
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)
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logger = logging.getLogger(__name__)
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T_TextStyle = tuple[QTextBlockFormat, QTextCharFormat]
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class ToQTextDocument(Tokenizer):
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"""Core: QTextDocument Writer
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Extend the Tokenizer class to generate a QTextDocument output. This
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is intended for usage in the document viewer and build tool preview.
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"""
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def __init__(self, project: NWProject) -> None:
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super().__init__(project)
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self._document = QTextDocument()
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self._document.setUndoRedoEnabled(False)
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self._styles: dict[int, T_TextStyle] = {}
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self._usedNotes: dict[str, int] = {}
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self._init = False
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self._bold = QFont.Weight.Bold
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self._normal = QFont.Weight.Normal
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return
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def initDocument(self) -> None:
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"""Initialise all computed values of the document."""
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self._document.setUndoRedoEnabled(False)
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self._document.blockSignals(True)
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self._document.clear()
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self._document.setDefaultFont(self._textFont)
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qMetric = QFontMetrics(self._textFont)
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mScale = qMetric.height()
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fPt = self._textFont.pointSizeF()
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self._mHead = {
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self.T_TITLE: (mScale * self._marginTitle[0], mScale * self._marginTitle[1]),
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self.T_HEAD1: (mScale * self._marginHead1[0], mScale * self._marginHead1[1]),
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self.T_HEAD2: (mScale * self._marginHead2[0], mScale * self._marginHead2[1]),
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self.T_HEAD3: (mScale * self._marginHead3[0], mScale * self._marginHead3[1]),
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self.T_HEAD4: (mScale * self._marginHead4[0], mScale * self._marginHead4[1]),
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}
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self._sHead = {
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self.T_TITLE: nwHeaders.H_SIZES.get(1, 1.0) * fPt,
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self.T_HEAD1: nwHeaders.H_SIZES.get(1, 1.0) * fPt,
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self.T_HEAD2: nwHeaders.H_SIZES.get(2, 1.0) * fPt,
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self.T_HEAD3: nwHeaders.H_SIZES.get(3, 1.0) * fPt,
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self.T_HEAD4: nwHeaders.H_SIZES.get(4, 1.0) * fPt,
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}
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self._mText = (mScale * self._marginText[0], mScale * self._marginText[1])
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self._mMeta = (mScale * self._marginMeta[0], mScale * self._marginMeta[1])
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self._defaultChar = QTextCharFormat()
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self._defaultChar.setForeground(SHARED.theme.colText)
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self._defaultBlock = QTextBlockFormat()
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self._defaultBlock.setTopMargin(self._mText[0])
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self._defaultBlock.setBottomMargin(self._mText[1])
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self._init = True
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return
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##
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# Properties
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##
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@property
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def document(self) -> QTextDocument:
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"""Return the document."""
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return self._document
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##
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# Class Methods
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##
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def clearDocument(self) -> None:
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"""Clear the document so the class can be reused."""
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self._document.clear()
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return
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def doConvert(self) -> None:
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"""Write text tokens into the document."""
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if not self._init:
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return
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self._document.blockSignals(True)
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cursor = QTextCursor(self._document)
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def newBlock(bFmt: QTextBlockFormat) -> None:
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if cursor.position() > 0:
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cursor.insertBlock(bFmt)
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else:
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cursor.setBlockFormat(bFmt)
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for tType, _, tText, tFormat, tStyle in self._tokens:
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# Styles
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bFmt = QTextBlockFormat(self._defaultBlock)
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if tStyle is not None:
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if tStyle & self.A_LEFT:
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bFmt.setAlignment(QtAlignLeft)
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elif tStyle & self.A_RIGHT:
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bFmt.setAlignment(QtAlignRight)
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elif tStyle & self.A_CENTRE:
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bFmt.setAlignment(QtAlignCenter)
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elif tStyle & self.A_JUSTIFY:
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bFmt.setAlignment(QtAlignJustify)
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if tStyle & self.A_PBB:
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bFmt.setPageBreakPolicy(QtPageBreakBefore)
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if tStyle & self.A_PBA:
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bFmt.setPageBreakPolicy(QtPageBreakAfter)
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if tStyle & self.A_Z_BTMMRG:
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bFmt.setBottomMargin(0.0)
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if tStyle & self.A_Z_TOPMRG:
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bFmt.setTopMargin(0.0)
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if tStyle & self.A_IND_L:
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bFmt.setLeftMargin(self._blockIndent)
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if tStyle & self.A_IND_R:
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bFmt.setRightMargin(self._blockIndent)
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if tType == self.T_TEXT:
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newBlock(bFmt)
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self._insertFragments(tText, tFormat, cursor, self._defaultChar)
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elif tType in self.L_HEADINGS:
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bFmt, cFmt = self._genHeadStyle(tType, bFmt)
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newBlock(bFmt)
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cursor.insertText(tText, cFmt)
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elif tType == self.T_SEP:
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newBlock(bFmt)
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cursor.insertText(tText, self._defaultChar)
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elif tType == self.T_SKIP:
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newBlock(bFmt)
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elif tType == self.T_SYNOPSIS and self._doSynopsis:
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pass
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elif tType == self.T_SHORT and self._doSynopsis:
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pass
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elif tType == self.T_COMMENT and self._doComments:
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pass
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elif tType == self.T_KEYWORD and self._doKeywords:
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pass
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self._document.blockSignals(False)
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return
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def appendFootnotes(self) -> None:
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"""Append the footnotes in the buffer."""
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# if self._usedNotes:
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# tags = STD_MD if self._genMode == self.M_STD else EXT_MD
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# footnotes = self._localLookup("Footnotes")
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# lines = []
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# lines.append(f"### {footnotes}\n\n")
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# for key, index in self._usedNotes.items():
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# if content := self._footnotes.get(key):
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# marker = f"{index}. "
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# text = self._formatText(*content, tags)
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# lines.append(f"{marker}{text}\n")
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# lines.append("\n")
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# result = "".join(lines)
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# self._result += result
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# self._fullMD.append(result)
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return
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##
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# Internal Functions
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##
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def _insertFragments(
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self, text: str, tFmt: T_Formats, cursor: QTextCursor,
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dFmt: QTextCharFormat, bgCol: QColor = QtTransparent
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) -> None:
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"""Apply formatting tags to text."""
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cFmt = QTextCharFormat(dFmt)
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start = 0
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for pos, fmt, data in tFmt:
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# Insert buffer with previous format
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cursor.insertText(text[start:pos], cFmt)
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# Construct next format
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if fmt == self.FMT_B_B:
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cFmt.setFontWeight(self._bold)
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elif fmt == self.FMT_B_E:
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cFmt.setFontWeight(self._normal)
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elif fmt == self.FMT_I_B:
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cFmt.setFontItalic(True)
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elif fmt == self.FMT_I_E:
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cFmt.setFontItalic(False)
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elif fmt == self.FMT_D_B:
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cFmt.setFontStrikeOut(True)
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elif fmt == self.FMT_D_E:
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cFmt.setFontStrikeOut(False)
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elif fmt == self.FMT_U_B:
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cFmt.setFontUnderline(True)
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elif fmt == self.FMT_U_E:
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cFmt.setFontUnderline(False)
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elif fmt == self.FMT_M_B:
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cFmt.setBackground(SHARED.theme.colMark)
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elif fmt == self.FMT_M_E:
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cFmt.setBackground(bgCol)
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elif fmt == self.FMT_SUP_B:
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cFmt.setVerticalAlignment(QtVAlignSuper)
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elif fmt == self.FMT_SUP_E:
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cFmt.setVerticalAlignment(QtVAlignNormal)
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elif fmt == self.FMT_SUB_B:
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cFmt.setVerticalAlignment(QtVAlignSub)
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elif fmt == self.FMT_SUB_E:
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cFmt.setVerticalAlignment(QtVAlignNormal)
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elif fmt == self.FMT_FNOTE:
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cFmt.setVerticalAlignment(QtVAlignSuper)
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if data in self._footnotes:
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index = len(self._usedNotes) + 1
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self._usedNotes[data] = index
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cursor.insertText(f"[{index}]", cFmt)
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else:
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cursor.insertText("[ERR]", cFmt)
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cFmt.setVerticalAlignment(QtVAlignNormal)
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# Move pos for next pass
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start = pos
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# Insert whatever is left in the buffer
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cursor.insertText(text[start:], cFmt)
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return
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def _formatKeywords(self, text: str, style: int) -> str:
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"""Apply Markdown formatting to keywords."""
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# valid, bits, _ = self._project.index.scanThis("@"+text)
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# if not valid or not bits:
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# return ""
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result = ""
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# if bits[0] in nwLabels.KEY_NAME:
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# result += f"**{self._localLookup(nwLabels.KEY_NAME[bits[0]])}:** "
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# if len(bits) > 1:
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# result += ", ".join(bits[1:])
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# result += " \n" if style & self.A_Z_BTMMRG else "\n\n"
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return result
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def _genHeadStyle(self, level: int, rFmt: QTextBlockFormat) -> T_TextStyle:
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"""Generate a heading style set."""
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mTop, mBottom = self._mHead.get(level, (0.0, 0.0))
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bFmt = QTextBlockFormat(rFmt)
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bFmt.setTopMargin(mTop)
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bFmt.setBottomMargin(mBottom)
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cFmt = QTextCharFormat(self._defaultChar)
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cFmt.setForeground(SHARED.theme.colHead)
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cFmt.setFontWeight(QFont.Weight.Bold)
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cFmt.setFontPointSize(self._sHead.get(level, 1.0))
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return bFmt, cFmt
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