fix: keep list item bullet inline with nested paragraph text (#2589)

lib/Epub/Epub/parsers/ChapterHtmlSlimParser.cpp

@@ -225,6 +225,7 @@ void ChapterHtmlSlimParser::flushPartWordBuffer() {
   currentTextBlock->addWord(partWordBuffer, fontStyle, false, nextWordContinues);
   partWordBufferIndex = 0;
   nextWordContinues = false;
+  listItemBulletOnly = false;
 }
 
 // start a new text block if needed
@@ -254,6 +255,17 @@ void ChapterHtmlSlimParser::startNewTextBlock(const BlockStyle& blockStyle) {
       return;
     }
 
+    // <li> added a bullet as the first word, making the block non-empty. When a nested
+    // block-level child (<p>, <div>, etc.) opens, reuse the block instead of flushing
+    // the bullet to its own line. The bullet stays inline with the child's text.
+    if (listItemBulletOnly) {
+      const auto style = currentTextBlock->getBlockStyle();
+      currentTextBlock->setBlockStyle(style.getCombinedBlockStyle(blockStyle, BlockStyle::CombineAxis::Vertical));
+      listItemBulletOnly = false;
+      flushPendingAnchor();
+      return;
+    }
+
     makePages();
   }
   // If the pending anchor is a TOC chapter boundary, force a page break after the previous
@@ -261,6 +273,7 @@ void ChapterHtmlSlimParser::startNewTextBlock(const BlockStyle& blockStyle) {
   flushPendingAnchor();
   currentTextBlock.reset(new ParsedText(extraParagraphSpacing, hyphenationEnabled, focusReadingEnabled, blockStyle));
   wordsExtractedInBlock = 0;
+  listItemBulletOnly = false;
 }
 
 void ChapterHtmlSlimParser::emitHorizontalRule(const BlockStyle& blockStyle) {
@@ -880,6 +893,7 @@ void XMLCALL ChapterHtmlSlimParser::startElement(void* userData, const XML_Char*
 
       if (strcmp(name, "li") == 0) {
         self->currentTextBlock->addWord("\xe2\x80\xa2", EpdFontFamily::REGULAR);
+        self->listItemBulletOnly = true;
       }
     }
   } else if (matches(name, UNDERLINE_TAGS, std::size(UNDERLINE_TAGS))) {
@@ -1286,6 +1300,13 @@ void XMLCALL ChapterHtmlSlimParser::endElement(void* userData, const XML_Char* n
       }
       self->blockStyleStack.pop_back();
     }
+
+    // </li> closes: if the bullet never got inline text (empty <li> or <li> with only
+    // block children that were flushed), clear the flag so the next sibling doesn't
+    // merge into this block.
+    if (strcmp(name, "li") == 0) {
+      self->listItemBulletOnly = false;
+    }
   }
 }
 

lib/Epub/Epub/parsers/ChapterHtmlSlimParser.h

@@ -80,6 +80,7 @@ class ChapterHtmlSlimParser {
   int tableDepth = 0;
   int tableRowIndex = 0;
   int tableColIndex = 0;
+  bool listItemBulletOnly = false;  // true when currentTextBlock has only the <li> bullet
 
   // Anchor-to-page mapping: tracks which page each HTML id attribute lands on
   int completedPageCount = 0;