1 files changed, 75 insertions, 0 deletions
diff --git a/asciidoc/blocks/table.py b/asciidoc/blocks/table.py
new file mode 100644
index 0000000..489260b
--- /dev/null
+++ b/asciidoc/blocks/table.py
@@ -0,0 +1,75 @@
+import copy
+import re
+from typing import Optional, Tuple
+
+ALIGN = {'<': 'left', '>': 'right', '^': 'center'}
+VALIGN = {'<': 'top', '>': 'bottom', '^': 'middle'}
+
+
+def parse_align_spec(align_spec: Optional[str]) -> Tuple[Optional[str], Optional[str]]:
+    """
+    Parse AsciiDoc cell alignment specifier and return 2-tuple with
+    horizontal and vertical alignment names. Unspecified alignments
+    set to None.
+    """
+    result = (None, None)
+    if align_spec:
+        mo = re.match(r'^([<\^>])?(\.([<\^>]))?$', align_spec)
+        if mo:
+            result = (
+                ALIGN.get(mo.group(1)),
+                VALIGN.get(mo.group(3)),
+            )
+    return result
+
+
+# TODO: remove _table_ from name once Table class has been moved into this file
+def parse_table_span_spec(span_spec: Optional[str]) -> Tuple[int, int]:
+    """
+    Parse AsciiDoc cell span specifier and return 2-tuple with horizontal
+    and vertical span counts. Set default values (1,1) if not
+    specified.
+    """
+    result = (None, None)
+    if span_spec:
+        mo = re.match(r'^(\d+)?(\.(\d+))?$', span_spec)
+        if mo:
+            result = (
+                mo.group(1) and int(mo.group(1)),
+                mo.group(3) and int(mo.group(3)),
+            )
+    return (result[0] or 1, result[1] or 1)
+
+
+class Column:
+    """Table column."""
+    def __init__(self, width=None, align_spec=None, style=None):
+        self.width = width or '1'
+        self.halign, self.valign = parse_align_spec(align_spec)
+        self.style = style      # Style name or None.
+        # Calculated attribute values.
+        self.abswidth = None    # 1..   (page units).
+        self.pcwidth = None     # 1..99 (percentage).
+
+
+class Cell:
+    def __init__(self, data, span_spec=None, align_spec=None, style=None):
+        self.data = data
+        self.span, self.vspan = parse_table_span_spec(span_spec)
+        self.halign, self.valign = parse_align_spec(align_spec)
+        self.style = style
+        self.reserved = False
+
+    def __repr__(self):
+        return '<Cell: %d.%d %s.%s %s "%s">' % (
+            self.span, self.vspan,
+            self.halign, self.valign,
+            self.style or '',
+            self.data)
+
+    def clone_reserve(self):
+        """Return a clone of self to reserve vertically spanned cell."""
+        result = copy.copy(self)
+        result.vspan = 1
+        result.reserved = True
+        return result