--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/eric6/UI/Previewers/MarkdownExtensions.py Fri Oct 25 20:15:51 2019 +0200
@@ -0,0 +1,144 @@
+# -*- coding: utf-8 -*-
+
+# Copyright (c) 2019 Detlev Offenbach <detlev@die-offenbachs.de>
+#
+
+"""
+Module implementing some Markdown extensions.
+"""
+
+import re
+
+from markdown.extensions import Extension
+from markdown.preprocessors import Preprocessor
+
+from markdown.inlinepatterns import SimpleTagInlineProcessor
+
+######################################################################
+## Code below is an enhanced copy of the Mermaid extension
+##
+## Original code Copyright 2018-2020 [Olivier Ruelle]
+## License: GNU GPLv3
+######################################################################
+
+MermaidRegex = re.compile(
+ r"^(?P<mermaid_sign>[\~\`]){3}[ \t]*[Mm]ermaid[ \t]*$"
+)
+MermaidRegexFullText = re.compile(
+ r"([\~\`]){3}[ \t]*[Mm]ermaid"
+)
+
+
+class MermaidPreprocessor(Preprocessor):
+ """
+ Class implementing a markdown pre-processor for Mermaid.
+ """
+ def run(self, lines):
+ """
+ Public method to do the pre-processing.
+
+ @param lines text lines to be processed
+ @type list of str
+ @return processed lines
+ @rtype list of str
+ """
+ new_lines = []
+ mermaid_sign = ""
+ m_start = None
+ m_end = None
+ in_mermaid_code = False
+ is_mermaid = False
+ old_line = ""
+ for line in lines:
+ # Wait for starting line with MermaidRegex
+ # (~~~ or ``` following by [mM]ermaid )
+ if not in_mermaid_code:
+ m_start = MermaidRegex.match(line)
+ else:
+ m_end = re.match(r"^[" + mermaid_sign + "]{3}[ \t]*$", line)
+ if m_end:
+ in_mermaid_code = False
+
+ if m_start:
+ in_mermaid_code = True
+ mermaid_sign = m_start.group("mermaid_sign")
+ if not re.match(r"^[\ \t]*$", old_line):
+ new_lines.append("")
+ if not is_mermaid:
+ is_mermaid = True
+ new_lines.append('<div class="mermaid">')
+ m_start = None
+ elif m_end:
+ new_lines.append('</div>')
+ new_lines.append("")
+ m_end = None
+ elif in_mermaid_code:
+ new_lines.append(
+ line.strip()
+ .replace("<", "<")
+ .replace(">", ">")
+ )
+ else:
+
+ new_lines.append(line)
+
+ old_line = line
+
+ if is_mermaid:
+ new_lines.append('')
+ new_lines.append(
+ '<script>mermaid.initialize({startOnLoad:true});</script>'
+ )
+
+ return new_lines
+
+
+class MermaidExtension(Extension):
+ """
+ Class implementing a Markdown Extension for Mermaid.
+ """
+ def extendMarkdown(self, md, md_globals):
+ """
+ Public method to register the extension.
+
+ @param md reference to markdown
+ @param md_globals global config parameters
+ """
+ md.preprocessors.register(MermaidPreprocessor(md), 'mermaid', 35)
+ md.registerExtension(self)
+
+######################################################################
+## Some extension to some basic additions
+######################################################################
+
+
+class SimplePatternExtension(Extension):
+ """
+ Class implementing a Markdown extension for ~, ~~, ^, ^^ and ==.
+
+ Note: This is a very simple pattern extension that might conflict with
+ formulas set for MathJax. Use the 'pymdown-extensions' package in this
+ case.
+ """
+ DEL_RE = r'(~~)(.+?)~~'
+ SUB_RE = r'(~)(.+?)~'
+ INS_RE = r'(\^\^)(.*?)\^\^'
+ SUP_RE = r'(\^)(.*?)\^'
+ MARK_RE = r'(==)(.*?)=='
+
+ def extendMarkdown(self, md):
+ """
+ Public method to register the extension.
+
+ @param md reference to markdown
+ """
+ md.inlinePatterns.register(
+ SimpleTagInlineProcessor(self.SUB_RE, 'sub'), 'subscript', 30)
+ md.inlinePatterns.register(
+ SimpleTagInlineProcessor(self.DEL_RE, 'del'), 'deleted', 40)
+ md.inlinePatterns.register(
+ SimpleTagInlineProcessor(self.SUP_RE, 'sup'), 'superscript', 30)
+ md.inlinePatterns.register(
+ SimpleTagInlineProcessor(self.INS_RE, 'ins'), 'inserted', 40)
+ md.inlinePatterns.register(
+ SimpleTagInlineProcessor(self.MARK_RE, 'mark'), 'mark', 40)
