mirror of
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131 lines
4.8 KiB
Python
131 lines
4.8 KiB
Python
#!/usr/bin/python
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# -*- coding: utf8 -*-
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import re
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from PyQt5.QtCore import Qt
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from PyQt5.QtGui import QTextCharFormat, QFont, QTextCursor, QFontMetrics
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from manuskript.ui.editors.basicHighlighter import basicHighlighter
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class MMDHighlighter(basicHighlighter):
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MARKDOWN_REGEX = {
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'Bold': '(\*\*)(.+?)(\*\*)',
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'Bold2': '(__)(.+?)(__)',
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'Italic': '(\*)([^\*].+?[^\*])(\*)',
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'Italic2': '(_)([^_].+?[^_])(_)',
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'Title': '^(#+)(\s*)(.*)(#*)',
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'HTML': '<.+?>',
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'Blockquotes': '^(> )+.*$',
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'OrderedList': '^\d+\.\s+',
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'UnorderedList': '^[\*\+-]\s+',
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'Code': '^\s{4,}.*$',
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'Links-inline': '(\[)(.*?)(\])(\()(.*?)(\))',
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'Links-ref': '(\[)(.*?)(\])\s?(\[)(.*?)(\])',
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'Links-ref2': '^\s{,3}(\[)(.*?)(\]:)\s+([^\s]*)\s*(.*?)*$',
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}
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def __init__(self, editor, style="Default"):
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basicHighlighter.__init__(self, editor)
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self.editor = editor
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self.rules = {}
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for key in self.MARKDOWN_REGEX:
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self.rules[key] = re.compile(self.MARKDOWN_REGEX[key])
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def highlightBlock(self, text):
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basicHighlighter.highlightBlockBefore(self, text)
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self.doHighlightBlock(text)
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basicHighlighter.highlightBlockAfter(self, text)
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def doHighlightBlock(self, text):
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"""
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A quick-n-dirty very basic highlighter, that fails in most non-trivial cases. And is ugly.
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"""
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# Creates textCharFormat
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cfOperator = QTextCharFormat()
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cfOperator.setForeground(Qt.lightGray)
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cfBold = QTextCharFormat()
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cfBold.setFontWeight(QFont.Bold)
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cfItalic = QTextCharFormat()
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cfItalic.setFontItalic(True)
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# Titles (only atx-style, with #, not underlined)
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defaultSize = self._defaultCharFormat.font().pointSize()
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r = self.rules["Title"]
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for m in r.finditer(text):
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cfOperator.setFontPointSize(defaultSize + 12 - 2 * len(m.group(1)))
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cfBold.setFontPointSize(defaultSize + 12 - 2 * len(m.group(1)))
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self.setFormat(m.start(1), len(m.group(1)), cfOperator)
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self.setFormat(m.start(3), len(m.group(3)), cfBold)
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self.setFormat(m.start(4), len(m.group(4)), cfOperator)
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# Code blocks
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r = self.rules["Code"]
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format = QTextCharFormat()
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format.setForeground(Qt.darkGray)
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format.setFontFixedPitch(True)
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for m in r.finditer(text):
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self.setFormat(m.start(), m.end() - m.start(), format)
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# Basic stuff
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stuff = [
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("Blockquotes", Qt.blue),
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("OrderedList", Qt.red),
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("UnorderedList", Qt.darkRed),
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("HTML", Qt.darkGreen),
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]
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for name, color in stuff:
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r = self.rules[name]
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format = QTextCharFormat()
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format.setForeground(color)
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for m in r.finditer(text):
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self.setFormat(m.start(), m.end() - m.start(), format)
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# Bold and Italic
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for name, style in [
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("Italic", cfItalic),
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("Italic2", cfItalic),
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("Bold", cfBold),
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("Bold2", cfBold),
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]:
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r = self.rules[name]
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for m in r.finditer(text):
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self.setFormat(m.start(1), len(m.group(1)), cfOperator)
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self.setFormat(m.start(2), len(m.group(2)), style)
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self.setFormat(m.start(3), len(m.group(3)), cfOperator)
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# Links
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cfURL = QTextCharFormat()
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cfURL.setForeground(Qt.darkGreen)
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cfURL.setFontItalic(True)
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cfText = QTextCharFormat()
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cfText.setForeground(Qt.darkBlue)
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cfIdentifier = QTextCharFormat()
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cfIdentifier.setForeground(Qt.darkMagenta)
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for type in ['Links-inline', 'Links-ref']:
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r = self.rules[type]
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for m in r.finditer(text):
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self.setFormat(m.start(1), len(m.group(1)), cfOperator)
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self.setFormat(m.start(2), len(m.group(2)), cfText)
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self.setFormat(m.start(3), len(m.group(3)), cfOperator)
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self.setFormat(m.start(4), len(m.group(4)), cfOperator)
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self.setFormat(m.start(5), len(m.group(5)), cfURL if "inline" in type else cfIdentifier)
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self.setFormat(m.start(6), len(m.group(6)), cfOperator)
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r = self.rules["Links-ref2"]
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for m in r.finditer(text):
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self.setFormat(m.start(1), len(m.group(1)), cfOperator)
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self.setFormat(m.start(2), len(m.group(2)), cfIdentifier)
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self.setFormat(m.start(3), len(m.group(3)), cfOperator)
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self.setFormat(m.start(4), len(m.group(4)), cfURL)
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self.setFormat(m.start(5), len(m.group(5)), cfText)
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