Added a filter to convert mathematical expressions

mkdocs_pandoc/filters/math.py

@@ -0,0 +1,28 @@
+# Copyright 2015 Johannes Grassler <[email protected]>
+# Copyright 2016 Kergonath <[email protected]>
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+import re
+
+class MathFilter(object):
+    """Turn the \( \) Markdown math notation into LaTex $$ inlines"""
+
+    def run(self, lines):
+        """Filter method"""
+        ret = []
+        for line in lines:
+            ret.append(re.sub(r'\\\((.*)\\\)', r'$\1$', line))
+
+        return ret

mkdocs_pandoc/filters/metadata.py

@@ -0,0 +1,34 @@
+# Copyright 2015 Johannes Grassler <[email protected]>
+# Copyright 2016 Kergonath <[email protected]>
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+import re
+
+class MetadataFilter(object):
+    """Turn the \( \) Markdown math notation into LaTex $$ inlines"""
+
+    def run(self, lines):
+        """Filter method"""
+        ret = []
+        header = True
+        for line in lines:
+            if header:
+                if not re.match(r'^[a-zA-Z\ ]:', line):
+                    header = False
+                    ret.append(line)
+            else:
+                ret.append(line)
+
+        return ret

mkdocs_pandoc/pandoc_converter.py

@@ -1,7 +1,9 @@
 import mkdocs_pandoc.filters.anchors
+import mkdocs_pandoc.filters.math
 import mkdocs_pandoc.filters.chapterhead
 import mkdocs_pandoc.filters.headlevels
 import mkdocs_pandoc.filters.images
+import mkdocs_pandoc.filters.metadata
 import mkdocs_pandoc.filters.exclude
 import mkdocs_pandoc.filters.include
 import mkdocs_pandoc.filters.tables
@@ -26,6 +28,8 @@ def __init__(self, **kwargs):
         self.filter_xrefs = kwargs.get('filter_xrefs', True)
         self.image_ext = kwargs.get('image_ext', None)
         self.strip_anchors = kwargs.get('strip_anchors', True)
+        self.strip_metadata = kwargs.get('strip_metadata', True)
+        self.convert_math = kwargs.get('convert_math', True)
         self.width = kwargs.get('width', 100)
 
         try:
@@ -133,7 +137,8 @@ def convert(self):
 
             if self.filter_include:
                 lines_tmp = f_include.run(lines_tmp)
-
+
+            lines_tmp = mkdocs_pandoc.filters.metadata.MetadataFilter().run(lines_tmp)
             lines_tmp = f_headlevel.run(lines_tmp)
             lines_tmp = f_chapterhead.run(lines_tmp)
             lines_tmp = f_image.run(lines_tmp)
@@ -146,6 +151,10 @@ def convert(self):
         if self.strip_anchors:
             lines = mkdocs_pandoc.filters.anchors.AnchorFilter().run(lines)
 
+        # Convert math expressions
+        if self.convert_math:
+            lines = mkdocs_pandoc.filters.math.MathFilter().run(lines)
+
         # Fix cross references
         if self.filter_xrefs:
             lines = mkdocs_pandoc.filters.xref.XrefFilter().run(lines)