Veronica Berglyd Olsen
407 lines
15 KiB
Python
407 lines
15 KiB
Python
"""
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novelWriter – QTextDocument Converter
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=====================================
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File History:
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Created: 2024-05-21 [2.5b1] ToQTextDocument
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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 pathlib import Path
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from PyQt5.QtCore import QMarginsF, QSizeF
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from PyQt5.QtGui import (
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QColor, QFont, QFontMetricsF, QPageSize, QTextBlockFormat, QTextCharFormat,
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QTextCursor, QTextDocument
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)
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from PyQt5.QtPrintSupport import QPrinter
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from novelwriter.constants import nwStyles, nwUnicode
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from novelwriter.core.project import NWProject
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from novelwriter.formats.shared import BlockFmt, BlockTyp, T_Formats, TextFmt
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from novelwriter.formats.tokenizer import HEADINGS, Tokenizer
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from novelwriter.types import (
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QtAlignAbsolute, QtAlignCenter, QtAlignJustify, QtAlignLeft, QtAlignRight,
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QtKeepAnchor, QtMoveAnchor, QtPageBreakAfter, QtPageBreakBefore,
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QtTransparent, QtVAlignNormal, QtVAlignSub, 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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def newBlock(cursor: QTextCursor, 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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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._document.setDocumentMargin(0)
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self._usedNotes: dict[str, int] = {}
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self._usedFields: list[tuple[int, str]] = []
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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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self._pageSize = QPageSize(QPageSize.PageSizeId.A4)
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self._pageMargins = QMarginsF(20.0, 20.0, 20.0, 20.0)
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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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# Setters
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##
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def setPageLayout(
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self, width: float, height: float, top: float, bottom: float, left: float, right: float
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) -> None:
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"""Set the document page size and margins in millimetres."""
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self._pageSize = QPageSize(QSizeF(width, height), QPageSize.Unit.Millimeter)
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self._pageMargins = QMarginsF(left, top, right, bottom)
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return
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##
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# Class Methods
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##
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def initDocument(self) -> None:
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"""Initialise all computed values of the document."""
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super().initDocument()
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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 = QFontMetricsF(self._textFont)
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mPx = qMetric.ascent() # 1 em in pixels
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fPt = self._textFont.pointSizeF()
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# Scaled Sizes
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# ============
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self._mHead = {
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BlockTyp.TITLE: (mPx * self._marginTitle[0], mPx * self._marginTitle[1]),
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BlockTyp.HEAD1: (mPx * self._marginHead1[0], mPx * self._marginHead1[1]),
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BlockTyp.HEAD2: (mPx * self._marginHead2[0], mPx * self._marginHead2[1]),
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BlockTyp.HEAD3: (mPx * self._marginHead3[0], mPx * self._marginHead3[1]),
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BlockTyp.HEAD4: (mPx * self._marginHead4[0], mPx * self._marginHead4[1]),
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}
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hScale = self._scaleHeads
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self._sHead = {
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BlockTyp.TITLE: (nwStyles.H_SIZES.get(0, 1.0) * fPt) if hScale else fPt,
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BlockTyp.HEAD1: (nwStyles.H_SIZES.get(1, 1.0) * fPt) if hScale else fPt,
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BlockTyp.HEAD2: (nwStyles.H_SIZES.get(2, 1.0) * fPt) if hScale else fPt,
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BlockTyp.HEAD3: (nwStyles.H_SIZES.get(3, 1.0) * fPt) if hScale else fPt,
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BlockTyp.HEAD4: (nwStyles.H_SIZES.get(4, 1.0) * fPt) if hScale else fPt,
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}
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self._mText = (mPx * self._marginText[0], mPx * self._marginText[1])
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self._mMeta = (mPx * self._marginMeta[0], mPx * self._marginMeta[1])
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self._mSep = (mPx * self._marginSep[0], mPx * self._marginSep[1])
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self._mIndent = mPx * 2.0
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self._tIndent = mPx * self._firstWidth
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# Text Formats
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# ============
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QtPropLineHeight = QTextBlockFormat.LineHeightTypes.ProportionalHeight
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self._blockFmt = QTextBlockFormat()
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self._blockFmt.setTopMargin(self._mText[0])
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self._blockFmt.setBottomMargin(self._mText[1])
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self._blockFmt.setAlignment(QtAlignAbsolute)
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self._blockFmt.setLineHeight(100.0*self._lineHeight, QtPropLineHeight)
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self._charFmt = QTextCharFormat()
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self._charFmt.setBackground(QtTransparent)
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self._charFmt.setForeground(self._theme.text)
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self._init = True
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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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cursor.movePosition(QTextCursor.MoveOperation.End)
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for tType, tMeta, tText, tFormat, tStyle in self._blocks:
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bFmt = QTextBlockFormat(self._blockFmt)
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if tType in (BlockTyp.COMMENT, BlockTyp.KEYWORD):
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bFmt.setTopMargin(self._mMeta[0])
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bFmt.setBottomMargin(self._mMeta[1])
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elif tType == BlockTyp.SEP:
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bFmt.setTopMargin(self._mSep[0])
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bFmt.setBottomMargin(self._mSep[1])
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if tStyle is not None:
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if tStyle & BlockFmt.LEFT:
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bFmt.setAlignment(QtAlignLeft)
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elif tStyle & BlockFmt.RIGHT:
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bFmt.setAlignment(QtAlignRight)
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elif tStyle & BlockFmt.CENTRE:
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bFmt.setAlignment(QtAlignCenter)
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elif tStyle & BlockFmt.JUSTIFY:
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bFmt.setAlignment(QtAlignJustify)
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if tStyle & BlockFmt.PBB:
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bFmt.setPageBreakPolicy(QtPageBreakBefore)
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if tStyle & BlockFmt.PBA:
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bFmt.setPageBreakPolicy(QtPageBreakAfter)
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if tStyle & BlockFmt.Z_BTM:
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bFmt.setBottomMargin(0.0)
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if tStyle & BlockFmt.Z_TOP:
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bFmt.setTopMargin(0.0)
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if tStyle & BlockFmt.IND_L:
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bFmt.setLeftMargin(self._mIndent)
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if tStyle & BlockFmt.IND_R:
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bFmt.setRightMargin(self._mIndent)
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if tStyle & BlockFmt.IND_T:
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bFmt.setTextIndent(self._tIndent)
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if tType in (BlockTyp.TEXT, BlockTyp.COMMENT, BlockTyp.KEYWORD):
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newBlock(cursor, bFmt)
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self._insertFragments(tText, tFormat, cursor, self._charFmt)
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elif tType in HEADINGS:
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bFmt, cFmt = self._genHeadStyle(tType, tMeta, bFmt)
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newBlock(cursor, bFmt)
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cursor.insertText(tText, cFmt)
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elif tType == BlockTyp.SEP:
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newBlock(cursor, bFmt)
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cursor.insertText(tText, self._charFmt)
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elif tType == BlockTyp.SKIP:
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newBlock(cursor, bFmt)
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cursor.insertText(nwUnicode.U_NBSP, self._charFmt)
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self._document.blockSignals(False)
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return
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def saveDocument(self, path: Path) -> None:
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"""Save the document as a PDF file."""
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m = self._pageMargins
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printer = QPrinter(QPrinter.PrinterMode.PrinterResolution)
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printer.setOutputFormat(QPrinter.OutputFormat.PdfFormat)
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printer.setPageSize(self._pageSize)
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printer.setPageMargins(m.left(), m.top(), m.right(), m.bottom(), QPrinter.Unit.Millimeter)
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printer.setOutputFileName(str(path))
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self._document.setPageSize(self._pageSize.size(QPageSize.Unit.Point))
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self._document.print(printer)
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return
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def closeDocument(self) -> None:
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"""Run close document tasks."""
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self._document.blockSignals(True)
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# Replace fields if there are stats available
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if self._usedFields and self._counts:
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cursor = QTextCursor(self._document)
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for pos, field in reversed(self._usedFields):
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if (value := self._counts.get(field)) is not None:
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cursor.setPosition(pos, QtMoveAnchor)
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cursor.setPosition(pos + 1, QtKeepAnchor)
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cursor.insertText(self._formatInt(value))
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# Add footnotes
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if self._usedNotes:
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cursor = QTextCursor(self._document)
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cursor.movePosition(QTextCursor.MoveOperation.End)
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bFmt, cFmt = self._genHeadStyle(BlockTyp.HEAD4, "", self._blockFmt)
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newBlock(cursor, bFmt)
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cursor.insertText(self._localLookup("Footnotes"), cFmt)
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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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cFmt = QTextCharFormat(self._charFmt)
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cFmt.setForeground(self._theme.code)
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cFmt.setAnchor(True)
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cFmt.setAnchorNames([f"footnote_{index}"])
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newBlock(cursor, self._blockFmt)
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cursor.insertText(f"{index}. ", cFmt)
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self._insertFragments(*content, cursor, self._charFmt)
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self._document.blockSignals(False)
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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, dFmt: QTextCharFormat
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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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temp = text.replace("\n", nwUnicode.U_LSEP)
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start = 0
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primary: QColor | None = None
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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(temp[start:pos], cFmt)
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# Construct next format
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if fmt == TextFmt.B_B:
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cFmt.setFontWeight(self._bold)
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elif fmt == TextFmt.B_E:
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cFmt.setFontWeight(self._normal)
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elif fmt == TextFmt.I_B:
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cFmt.setFontItalic(True)
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elif fmt == TextFmt.I_E:
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cFmt.setFontItalic(False)
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elif fmt == TextFmt.D_B:
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cFmt.setFontStrikeOut(True)
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elif fmt == TextFmt.D_E:
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cFmt.setFontStrikeOut(False)
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elif fmt == TextFmt.U_B:
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cFmt.setFontUnderline(True)
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elif fmt == TextFmt.U_E:
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cFmt.setFontUnderline(False)
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elif fmt == TextFmt.M_B:
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cFmt.setBackground(self._theme.highlight)
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elif fmt == TextFmt.M_E:
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cFmt.setBackground(QtTransparent)
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elif fmt == TextFmt.SUP_B:
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cFmt.setVerticalAlignment(QtVAlignSuper)
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elif fmt == TextFmt.SUP_E:
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cFmt.setVerticalAlignment(QtVAlignNormal)
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elif fmt == TextFmt.SUB_B:
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cFmt.setVerticalAlignment(QtVAlignSub)
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elif fmt == TextFmt.SUB_E:
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cFmt.setVerticalAlignment(QtVAlignNormal)
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elif fmt == TextFmt.COL_B:
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if color := self._classes.get(data):
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cFmt.setForeground(color)
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primary = color
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elif fmt == TextFmt.COL_E:
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cFmt.setForeground(self._theme.text)
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primary = None
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elif fmt == TextFmt.ANM_B:
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cFmt.setAnchor(True)
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cFmt.setAnchorNames([data])
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elif fmt == TextFmt.ANM_E:
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cFmt.setAnchor(False)
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elif fmt == TextFmt.ARF_B:
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cFmt.setFontUnderline(True)
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cFmt.setAnchor(True)
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cFmt.setAnchorHref(data)
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elif fmt == TextFmt.ARF_E:
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cFmt.setFontUnderline(False)
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cFmt.setAnchor(False)
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cFmt.setAnchorHref("")
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elif fmt == TextFmt.HRF_B:
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cFmt.setForeground(self._theme.link)
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cFmt.setFontUnderline(True)
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cFmt.setAnchor(True)
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cFmt.setAnchorHref(data)
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elif fmt == TextFmt.HRF_E:
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cFmt.setForeground(primary or self._theme.text)
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cFmt.setFontUnderline(False)
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cFmt.setAnchor(False)
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cFmt.setAnchorHref("")
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elif fmt == TextFmt.FNOTE:
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xFmt = QTextCharFormat(self._charFmt)
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xFmt.setForeground(self._theme.code)
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xFmt.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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xFmt.setAnchor(True)
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xFmt.setAnchorHref(f"#footnote_{index}")
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xFmt.setFontUnderline(True)
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cursor.insertText(f"[{index}]", xFmt)
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else:
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cursor.insertText("[ERR]", cFmt)
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elif fmt == TextFmt.FIELD:
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if field := data.partition(":")[2]:
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self._usedFields.append((cursor.position(), field))
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cursor.insertText("0", cFmt)
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pass
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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(temp[start:], cFmt)
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return
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def _genHeadStyle(self, hType: BlockTyp, hKey: str, rFmt: QTextBlockFormat) -> T_TextStyle:
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"""Generate a heading style set."""
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mTop, mBottom = self._mHead.get(hType, (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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hCol = self._colorHeads and hType != BlockTyp.TITLE
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cFmt = QTextCharFormat(self._charFmt)
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cFmt.setForeground(self._theme.head if hCol else self._theme.text)
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cFmt.setFontWeight(self._bold if self._boldHeads else self._normal)
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cFmt.setFontPointSize(self._sHead.get(hType, 1.0))
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if hKey:
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cFmt.setAnchorNames([hKey])
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cFmt.setAnchor(True)
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return bFmt, cFmt
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