diff options
Diffstat (limited to 'markdown/extensions/tables.py')
| -rw-r--r-- | markdown/extensions/tables.py | 79 |
1 files changed, 53 insertions, 26 deletions
diff --git a/markdown/extensions/tables.py b/markdown/extensions/tables.py index 4bb2076..ebe6ffa 100644 --- a/markdown/extensions/tables.py +++ b/markdown/extensions/tables.py @@ -26,28 +26,43 @@ import re class TableProcessor(BlockProcessor): """ Process Tables. """ - RE_CODE_PIPES = re.compile(r'(?:(\\\\)|(`+)|(\\\|)|(\|))') + RE_CODE_PIPES = re.compile(r'(?:(\\\\)|(\\`+)|(`+)|(\\\|)|(\|))') + RE_END_BORDER = re.compile(r'(?<!\\)(?:\\\\)*\|$') + + def __init__(self, parser): + self.border = False + self.separator = '' + super(TableProcessor, self).__init__(parser) def test(self, parent, block): - rows = block.split('\n') - return (len(rows) > 1 and '|' in rows[0] and - '|' in rows[1] and '-' in rows[1] and - rows[1].strip()[0] in ['|', ':', '-'] and - set(rows[1]) <= set('|:- ')) + """ + Ensure first two rows (column header and separator row) are valid table rows. + + Keep border check and separator row do avoid repeating the work. + """ + is_table = False + header = [row.strip() for row in block.split('\n')[0:2]] + if len(header) == 2: + self.border = header[0].startswith('|') + row = self._split_row(header[0]) + is_table = len(row) > 1 + + if is_table: + row = self._split_row(header[1]) + is_table = len(row) > 1 and set(''.join(row)) <= set('|:- ') + if is_table: + self.separator = row + return is_table def run(self, parent, blocks): """ Parse a table block and build table. """ block = blocks.pop(0).split('\n') header = block[0].strip() - seperator = block[1].strip() rows = [] if len(block) < 3 else block[2:] - # Get format type (bordered by pipes or not) - border = False - if header.startswith('|'): - border = True + # Get alignment of columns align = [] - for c in self._split_row(seperator, border): + for c in self.separator: c = c.strip() if c.startswith(':') and c.endswith(':'): align.append('center') @@ -57,21 +72,22 @@ class TableProcessor(BlockProcessor): align.append('right') else: align.append(None) + # Build table table = etree.SubElement(parent, 'table') thead = etree.SubElement(table, 'thead') - self._build_row(header, thead, align, border) + self._build_row(header, thead, align) tbody = etree.SubElement(table, 'tbody') for row in rows: - self._build_row(row.strip(), tbody, align, border) + self._build_row(row.strip(), tbody, align) - def _build_row(self, row, parent, align, border): + def _build_row(self, row, parent, align): """ Given a row of text, build table cells. """ tr = etree.SubElement(parent, 'tr') tag = 'td' if parent.tag == 'thead': tag = 'th' - cells = self._split_row(row, border) + cells = self._split_row(row) # We use align here rather than cells to ensure every row # contains the same number of columns. for i, a in enumerate(align): @@ -83,13 +99,12 @@ class TableProcessor(BlockProcessor): if a: c.set('align', a) - def _split_row(self, row, border): + def _split_row(self, row): """ split a row of text into list of cells. """ - if border: + if self.border: if row.startswith('|'): row = row[1:] - if row.endswith('|'): - row = row[:-1] + row = self.RE_END_BORDER.sub('', row) return self._split(row) def _split(self, row): @@ -106,23 +121,33 @@ class TableProcessor(BlockProcessor): for m in self.RE_CODE_PIPES.finditer(row): # Store ` data (len, start_pos, end_pos) if m.group(2): + # \`+ + # Store length of each tic group: subtract \ + tics.append(len(m.group(2)) - 1) + # Store start of group, end of group, and escape length + tic_points.append((m.start(2), m.end(2) - 1, 1)) + elif m.group(3): # `+ # Store length of each tic group - tics.append(len(m.group(2))) - # Store start and end of tic group - tic_points.append((m.start(2), m.end(2) - 1)) + tics.append(len(m.group(3))) + # Store start of group, end of group, and escape length + tic_points.append((m.start(3), m.end(3) - 1, 0)) # Store pipe location - elif m.group(4): - pipes.append(m.start(4)) + elif m.group(5): + pipes.append(m.start(5)) # Pair up tics according to size if possible + # Subtract the escape length *only* from the opening. # Walk through tic list and see if tic has a close. # Store the tic region (start of region, end of region). pos = 0 tic_len = len(tics) while pos < tic_len: try: - index = tics[pos + 1:].index(tics[pos]) + 1 + tic_size = tics[pos] - tic_points[pos][2] + if tic_size == 0: + raise ValueError + index = tics[pos + 1:].index(tic_size) + 1 tic_region.append((tic_points[pos][0], tic_points[pos + index][1])) pos += index + 1 except ValueError: @@ -160,6 +185,8 @@ class TableExtension(Extension): def extendMarkdown(self, md, md_globals): """ Add an instance of TableProcessor to BlockParser. """ + if '|' not in md.ESCAPED_CHARS: + md.ESCAPED_CHARS.append('|') md.parser.blockprocessors.add('table', TableProcessor(md.parser), '<hashheader') |