feat: add support for bold list text in DOCX to PDF conversion

Author: shps951023

src/MiniPdf/DocxReader.cs

@@ -451,6 +451,7 @@ internal static DocxDocument Read(Stream stream)
         bool snapToGrid = true;
         int listLevel = 0;
         string? listText = null;
+        bool listTextBold = false;
         string? styleId = null;
         bool bold = false;
         bool italic = false;
@@ -562,6 +563,7 @@ internal static DocxDocument Read(Stream stream)
                     var lvlDef = numDef.Levels.FirstOrDefault(l => l.Ilvl == listLevel) ?? numDef.Levels.FirstOrDefault();
                     if (lvlDef != null)
                     {
+                        if (lvlDef.Bold) listTextBold = true;
                         if (indentLeft == 0 && lvlDef.IndentLeft > 0)
                             indentLeft = lvlDef.IndentLeft;
                         if (indentFirstLine == 0 && lvlDef.Hanging > 0)
@@ -855,7 +857,7 @@ internal static DocxDocument Read(Stream stream)
         // If paragraph has no runs and no images, represent as empty paragraph for spacing
         return new DocxParagraph(runs, images, alignment, spacingBefore, spacingAfter,
             lineSpacing, lineSpacingAbsolute, lineSpacingExact, indentLeft, indentRight, indentFirstLine,
-            isBulletList, isNumberedList, listLevel, listText, styleId,
+            isBulletList, isNumberedList, listLevel, listText, listTextBold, styleId,
             bold, italic, fontSize, color, pageBreakBefore, pageBreakAfter, paragraphShading, tabStops,
             sectionBreakLayout, borders, shapes.Count > 0 ? shapes : null,
             ContextualSpacing: contextualSpacing, SnapToGrid: snapToGrid,
@@ -3410,8 +3412,12 @@ private static Dictionary<string, DocxNumberingDef> ReadNumbering(ZipArchive arc
                         lvlHanging = lh / 20f;
                 }
                 // Read bullet font name from rPr/rFonts (e.g. Wingdings, Symbol)
-                var lvlFontName = lvl.Element(W + "rPr")?.Element(W + "rFonts")?.Attribute(W + "ascii")?.Value;
-                levels.Add(new DocxNumberingLevelDef(ilvl, numFmt, lvlText, startVal, lvlIndentLeft, lvlHanging, lvlFontName));
+                var lvlRPr = lvl.Element(W + "rPr");
+                var lvlFontName = lvlRPr?.Element(W + "rFonts")?.Attribute(W + "ascii")?.Value;
+                // Read bold from numbering level rPr (used for list label rendering)
+                var lvlBoldEl = lvlRPr?.Element(W + "b");
+                var lvlBold = lvlBoldEl != null && lvlBoldEl.Attribute(W + "val")?.Value is not ("0" or "false");
+                levels.Add(new DocxNumberingLevelDef(ilvl, numFmt, lvlText, startVal, lvlIndentLeft, lvlHanging, lvlFontName, lvlBold));
             }
             abstractDefs[absId] = levels;
         }
@@ -3496,6 +3502,7 @@ internal sealed record DocxParagraph(
     bool IsNumberedList = false,
     int ListLevel = 0,
     string? ListText = null,
+    bool ListTextBold = false,
     string? StyleId = null,
     bool Bold = false,
     bool Italic = false,
@@ -3833,4 +3840,4 @@ private static string ToRoman(int num)
     }
 }
 
-internal sealed record DocxNumberingLevelDef(int Ilvl, string NumFmt, string LvlText, int Start, float IndentLeft = 0, float Hanging = 0, string? FontName = null);
+internal sealed record DocxNumberingLevelDef(int Ilvl, string NumFmt, string LvlText, int Start, float IndentLeft = 0, float Hanging = 0, string? FontName = null, bool Bold = false);

src/MiniPdf/DocxToPdfConverter.cs

@@ -1025,7 +1025,7 @@ private static void RenderParagraph(RenderState state, DocxParagraph paragraph)
             {
                 // Hanging indent from DOCX: number at outdented position, body text at indentLeft
                 var numberX = options.MarginLeft + paragraph.IndentLeft + paragraph.IndentFirstLine;
-                state.CurrentPage!.AddText(paragraph.ListText, numberX, state.CurrentY, fontSize, preferredFontName: listFont);
+                state.CurrentPage!.AddText(paragraph.ListText, numberX, state.CurrentY, fontSize, preferredFontName: listFont, bold: paragraph.ListTextBold);
                 // x and availableWidth remain unchanged (body text wraps at indentLeft)
             }
             else
@@ -1036,13 +1036,13 @@ private static void RenderParagraph(RenderState state, DocxParagraph paragraph)
                     // Style already provides left indentation (e.g. ListParagraph)
                     // Place the label to the left of the text body without reducing available width
                     var numberX = options.MarginLeft + Math.Max(0, paragraph.IndentLeft - 18f);
-                    state.CurrentPage!.AddText(paragraph.ListText, numberX, state.CurrentY, fontSize, preferredFontName: listFont);
+                    state.CurrentPage!.AddText(paragraph.ListText, numberX, state.CurrentY, fontSize, preferredFontName: listFont, bold: paragraph.ListTextBold);
                     // x and availableWidth remain unchanged (indentLeft already accounts for list)
                 }
                 else
                 {
                     var listIndent = 18f * (paragraph.ListLevel + 1);
-                    state.CurrentPage!.AddText(paragraph.ListText, x + listIndent - 12f, state.CurrentY, fontSize, preferredFontName: listFont);
+                    state.CurrentPage!.AddText(paragraph.ListText, x + listIndent - 12f, state.CurrentY, fontSize, preferredFontName: listFont, bold: paragraph.ListTextBold);
                     x += listIndent;
                     availableWidth -= listIndent;
                 }
@@ -1237,7 +1237,7 @@ private static void RenderParagraph(RenderState state, DocxParagraph paragraph)
                 paragraph.SpacingBefore, paragraph.SpacingAfter, paragraph.LineSpacing, paragraph.LineSpacingAbsolute,
                 paragraph.LineSpacingExact, paragraph.IndentLeft, paragraph.IndentRight, paragraph.IndentFirstLine,
                 paragraph.IsBulletList, paragraph.IsNumberedList, paragraph.ListLevel, paragraph.ListText,
-                paragraph.StyleId, paragraph.Bold, paragraph.Italic, paragraph.FontSize, paragraph.Color,
+                paragraph.ListTextBold, paragraph.StyleId, paragraph.Bold, paragraph.Italic, paragraph.FontSize, paragraph.Color,
                 paragraph.HasPageBreakBefore, paragraph.HasPageBreakAfter, paragraph.Shading, paragraph.TabStops,
                 paragraph.SectionBreak, paragraph.Borders),
                 x, firstLineX, wrapAvailableWidth, wrapFirstLineWidth, fontSize, lineHeight);