fix: Prevent text wrapping when already within width (#113)

Author: DenverCoder1

Diff for: table2ascii/table_to_ascii.py

@@ -130,6 +130,11 @@ def __determine_alignments(
 
         return list(alignments)
 
+    def __widest_line(self, value: SupportsStr) -> int:
+        """Returns the width of the longest line in a multi-line string"""
+        text = str(value)
+        return max(self.__str_width(line) for line in text.splitlines()) if len(text) else 0
+
     def __auto_column_widths(self) -> list[int]:
         """Get the minimum number of characters needed for the values in each column in the table
         with 1 space of padding on each side.
@@ -138,18 +143,13 @@ def __auto_column_widths(self) -> list[int]:
             The minimum number of characters needed for each column
         """
 
-        def widest_line(value: SupportsStr) -> int:
-            """Returns the width of the longest line in a multi-line string"""
-            text = str(value)
-            return max(self.__str_width(line) for line in text.splitlines()) if len(text) else 0
-
         def get_column_width(row: Sequence[SupportsStr], column: int) -> int:
             """Get the width of a cell in a column"""
             value = row[column]
             next_value = row[column + 1] if column < self.__columns - 1 else None
             if value is Merge.LEFT or next_value is Merge.LEFT:
                 return 0
-            return widest_line(value)
+            return self.__widest_line(value)
 
         column_widths = []
         # get the width necessary for each column
@@ -306,7 +306,12 @@ def __wrap_long_lines_in_merged_cells(
                 if row[other_col_index] is not Merge.LEFT:
                     break
                 merged_width += self.__column_widths[other_col_index] + len(column_separator)
-            cell = textwrap.fill(str(cell), merged_width - self.__cell_padding * 2)
+            cell = str(cell)
+            # if the text is too wide, wrap it
+            inner_cell_width = merged_width - self.__cell_padding * 2
+            if self.__widest_line(cell) > inner_cell_width:
+                cell = textwrap.fill(cell, inner_cell_width)
+            # add the wrapped cell to the row
             wrapped_row.append(cell)
         return wrapped_row
 

Diff for: tests/test_convert.py

@@ -305,3 +305,22 @@ def test_east_asian_wide_characters_and_zero_width_no_wcwidth():
         "╚════╩═══════════════╝"
     )
     assert text == expected
+
+
+def test_multiline_cells_with_wrappable_lines():
+    text = t2a(
+        header=["Test"],
+        body=[["Line One...\nSecond Line...\nLineNumThree\nLineFour\nFive FinalLine"]],
+    )
+    expected = (
+        "╔════════════════╗\n"
+        "║      Test      ║\n"
+        "╟────────────────╢\n"
+        "║  Line One...   ║\n"
+        "║ Second Line... ║\n"
+        "║  LineNumThree  ║\n"
+        "║    LineFour    ║\n"
+        "║ Five FinalLine ║\n"
+        "╚════════════════╝"
+    )
+    assert text == expected