Constraint table within a numbering list to not exceed page margin #202

Author: onizet

src/Html2OpenXml/Expressions/Numbering/ListExpression.cs

@@ -93,13 +93,20 @@ public override IEnumerable<OpenXmlElement> Interpret(ParsingContext context)
 
             // table must be aligned to the list item
             var tables = childElements.OfType<Table>();
+            var tableIndentation = level * Indentation * 2;
             foreach (var table in tables)
             {
                 var tableProperties = table.GetFirstChild<TableProperties>();
                 if (tableProperties == null)
                     table.PrependChild(tableProperties = new());
 
-                tableProperties.TableIndentation ??= new() { Width = level * Indentation * 2 };
+                tableProperties.TableIndentation ??= new() { Width = tableIndentation };
+                // ensure to restrain the table width to the list item
+                if (tableProperties.TableWidth?.Type?.Value == TableWidthUnitValues.Pct
+                    && tableProperties.TableWidth?.Width?.Value == "5000")
+                {
+                    tableProperties.TableWidth.Width = (5000 - tableIndentation).ToString();
+                }
             }
 
             // ensure to filter out any non-paragraph like any nested table

test/HtmlToOpenXml.Tests/NumberingTests.cs

@@ -636,6 +636,10 @@ public void NestedTable_ReturnsAlignedTable()
                 Assert.That(tableProperties, Is.Not.Null);
                 Assert.That(tableProperties.TableIndentation, Is.Not.Null);
                 Assert.That(tableProperties.TableIndentation.Width?.Value, Is.EqualTo(720 * (i+1)));
+                Assert.That(tableProperties.TableWidth, Is.Not.Null);
+                Assert.That(tableProperties.TableWidth.Type?.Value, Is.EqualTo(TableWidthUnitValues.Pct));
+                Assert.That(tableProperties.TableWidth.Width?.HasValue, Is.True);
+                Assert.That(Convert.ToInt32(tableProperties.TableWidth.Width.Value), Is.GreaterThan(0).And.LessThan(5000));
             }
         }
     }